FICS 1.6.2

9 files changed, 24694 insertions, 0 deletions

diff --git a/data/book/changes.txt b/data/book/changes.txt
new file mode 100644
index 0000000..3314120
--- /dev/null
+++ b/data/book/changes.txt
@@ -0,0 +1,25 @@
+
+To long001.idx:
+
+Changed:
+
+  KGA: bishop's gambit, Chigorin's attack/Gifford variation
+  KGA: bishop's gambit, Chigorin's attack (Gifford variation)
+
+  Santasiere's folly
+  Santasiere's Folly
+
+  Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein)
+  Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein, anti-H\"ubner system)
+
+  Ruy Lopez: closed (8...Na5)
+  Ruy Lopez: closed (9...Na5)
+
+  All occurences of "defence" to "defense"
+  All occurences of "manoevre" to "maneuver"
+  All occurences of "centre" to "center"
+
+Added:
+
+  Queen's pawn: London system
+   d2d4 g8f6 c1f4
diff --git a/data/book/eco000.idx b/data/book/eco000.idx
new file mode 100644
index 0000000..9cfbbea
--- /dev/null
+++ b/data/book/eco000.idx
@@ -0,0 +1,2008 @@
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diff --git a/data/book/eco999.idx b/data/book/eco999.idx
new file mode 100644
index 0000000..9cfbbea
--- /dev/null
+++ b/data/book/eco999.idx
@@ -0,0 +1,2008 @@
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diff --git a/data/book/fen.doc b/data/book/fen.doc
new file mode 100644
index 0000000..da5570c
--- /dev/null
+++ b/data/book/fen.doc
@@ -0,0 +1,130 @@
+
+Opening classification uses modified FEN notation, i.e. the halfmove and
+fullmove numbers are dropped since these are irrelvant for opening positions.
+
+---
+
+16.1.1: History
+
+FEN is based on a 19th century standard for position recording designed by the
+Scotsman David Forsyth, a newspaper journalist.  The original Forsyth standard
+has been slightly extended for use with chess software by Steven Edwards with
+assistance from commentators on the Internet.  This new standard, FEN, was
+first implemented in Edwards' SAN Kit.
+
+16.1.2: Uses for a position notation
+
+Having a standard position notation is particularly important for chess
+programmers as it allows them to share position databases.  For example,
+there exist standard position notation databases with many of the classical
+benchmark tests for chessplaying programs, and by using a common position
+notation format many hours of tedious data entry can be saved.  Additionally,
+a position notation can be useful for page layout programs and for confirming
+position status for e-mail competition.
+
+Many interesting chess problem sets represented using FEN can be found at the
+chess.uoknor.edu ftp site in the directory pub/chess/SAN_testsuites.
+
+
+16.1.3: Data fields
+
+FEN specifies the piece placement, the active color, the castling
+availability, the en passant target square, the halfmove clock, and the
+fullmove number.  These can all fit on a single text line in an easily
+read format.  The length of a FEN position description varies somewhat
+according to the position. In some cases, the description could be eighty
+or more characters in length and so may not fit conveniently on some
+displays.  However, these positions aren't too common.
+
+A FEN description has six fields.  Each field is composed only of non-blank
+printing ASCII characters.  Adjacent fields are separated by a single ASCII
+space character.
+
+
+16.1.3.1: Piece placement data
+
+The first field represents the placement of the pieces on the board.  The
+board contents are specified starting with the eighth rank and ending with
+the first rank.  For each rank, the squares are specified from file a to
+file h.  White pieces are identified by uppercase SAN piece letters
+("PNBRQK") and black pieces are identified by lowercase SAN piece letters
+("pnbrqk").  Empty squares are represented by the digits one through eight;
+the digit used represents the count of contiguous empty squares along a
+rank.  A solidus character "/" is used to separate data of adjacent ranks.
+
+
+16.1.3.2: Active color
+
+The second field represents the active color.  A lower case "w" is used if
+White is to move; a lower case "b" is used if Black is the active player.
+
+
+16.1.3.3: Castling availability
+
+The third field represents castling availability.  This indicates potential
+future castling that may of may not be possible at the moment due to blocking
+pieces or enemy attacks.  If there is no castling availability for either
+side, the single character symbol "-" is used.  Otherwise, a combination of
+from one to four characters are present.  If White has kingside castling
+availability, the uppercase letter "K" appears.  If White has queenside
+castling availability, the uppercase letter "Q" appears.  If Black has
+kingside castling availability, the lowercase letter "k" appears.  If
+Black has queenside castling availability, then the lowercase letter "q"
+appears.  Those letters which appear will be ordered first uppercase before
+lowercase and second kingside before queenside.  There is no white space
+between the letters.
+
+
+16.1.3.4: En passant target square
+
+The fourth field is the en passant target square.  If there is no en passant
+target square then the single character symbol "-" appears.  If there is an
+en passant target square then is represented by a lowercase file character
+immediately followed by a rank digit.  Obviously, the rank digit will be "3"
+following a white pawn double advance (Black is the active color) or else be
+the digit "6" after a black pawn double advance (White being the active
+color).
+
+An en passant target square is given if and only if the last move was a pawn
+advance of two squares.  Therefore, an en passant target square field may have
+a square name even if there is no pawn of the opposing side that may
+immediately execute the en passant capture.
+
+
+16.1.3.5: Halfmove clock
+
+The fifth field is a nonnegative integer representing the halfmove clock.
+This number is the count of halfmoves (or ply) since the last pawn advance
+or capturing move.  This value is used for the fifty move draw rule.
+
+
+16.1.3.6: Fullmove number
+
+The sixth and last field is a positive integer that gives the fullmove number.
+This will have the value "1" for the first move of a game for both White and
+Black.  It is incremented by one immediately after each move by Black.
+
+
+16.1.4: Examples
+
+Here's the FEN for the starting position:
+
+rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
+
+And after the move 1. e4:
+
+rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1
+
+And then after 1. ... c5:
+
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq c6 0 2
+
+And then after 2. Nf3:
+
+rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq - 1 2
+
+For two kings on their home squares and a white pawn on e2 (White to move)
+with thirty eight full moves played with five halfmoves since the last pawn
+move or capture:
+
+4k3/8/8/8/8/8/4P3/4K3 w - - 5 39
diff --git a/data/book/long001.idx b/data/book/long001.idx
new file mode 100644
index 0000000..a370e2e
--- /dev/null
+++ b/data/book/long001.idx
@@ -0,0 +1,8076 @@
+1q3rk1/pp3ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, classical, 13.d1b1 (Mar\'oczy) *
+1r2kb1r/p1pq2pp/Q1n5/3npp2/6b1/P2PPN2/1P3PPP/RNB1KB1R b KQk -
+Sicilian: Najdorf, Poisoned pawn variation *
+1rb2rk1/pp3ppp/5q2/3P4/1n6/2P1Q3/PP3PPP/RN2KB1R w KQ -
+Scotch: Gottschall variation
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ -
+King's Indian: S\"amisch, Panno main line
+1rbq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, Ruban variation
+1rbqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQk -
+English: closed, 5.Rb1 *
+1rbqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3PN/PPPP1PBP/R1BQK2R b KQk -
+English: closed, 5.Rb1 Taimanov variation *
+1rbqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQk -
+two knights defense: Colman variation
+2bqkbnr/r4ppp/p1npp3/1p6/4P3/1BN2N2/PP2QPPP/R1B2RK1 w k -
+Sicilian: Smith-Morra gambit, Chicago defense
+2kr1b1r/ppp3pp/2n2q2/3npp2/6b1/P2PPN2/1PQNBPPP/R1B1K2R b KQ -
+Sicilian: Najdorf, 7...Be7 main line *
+2kr1b1r/ppp3pp/2n5/3qpp2/6b1/3PPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 *
+2kr1b1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P1B1PPP/R2QKB1R b KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7 *
+2kr1b1r/pppq2pp/2n1bp2/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, Yugoslav attack, Rauser variation *
+2kr1b1r/pppq2pp/2n2n2/2Pp1p2/3Pp3/2N1P3/PP1NQPPP/R1B2RK1 b - -
+French: classical, St\a hlberg variation *
+2kr1b1r/pppq2pp/2n2n2/4pp2/1P6/P1NPPb2/3BBPPP/R2QK2R w KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6 *
+2kr1b1r/pppq2pp/2n5/3Npp2/6b1/3PPN2/PP2BPPP/R1BQ1RK1 b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 *
+2kr1b1r/pppq2pp/2n5/3npp2/4P1b1/2NP1N2/PP2BPPP/R1BQ1RK1 b - -
+Sicilian: Richter-Rauzer, Rauzer attack, Geller variation *
+2kr1b1r/pppq2pp/2n5/3npp2/6b1/2NPPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4 *
+2kr1b1r/pppq2pp/2n5/3npp2/6b1/P1NPPN2/1P1BBPPP/R2QK2R b KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7 *
+2kr3r/pp2bppp/2nqbn2/3pp1B1/8/1NN3P1/PPP1PPBP/R2Q1RK1 w - -
+Gr\"unfeld: Russian, Keres variation *
+2kr3r/ppp2ppp/1bn1bPq1/6N1/2ppNPP1/8/PPP4P/R1BQR1K1 w - -
+two knights: Max Lange attack, Berger variation
+2kr3r/pppb1ppp/2n1q2n/1Bb1p3/8/2NP1N2/PPP2PPP/R1BQR1K1 w - -
+Center game: Kupreichik variation *
+2kr3r/pppq2p1/1bn1bp2/3np2p/Q7/2NP1NP1/PP1BPPBP/R1R3K1 w - -
+Sicilian: dragon, Yugoslav attack, 12.h4 *
+2kr3r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP1BPPBP/R2Q1RK1 w - -
+Sicilian: dragon, Yugoslav attack, 10.O-O-O *
+2kr3r/pppqbppp/1nn1p3/4Pb2/2PP4/2N1BN2/PP2B1PP/R2Q1RK1 w - -
+Alekhine's defense: four pawns attack, Tartakower variation
+2kr3r/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, Grigoriev variation *
+2kr3r/ppq1nppp/2nbp3/3p4/3P2b1/5N2/PPP1BPPP/R1BQRNK1 w - -
+QGD: exchange, chameleon variation *
+2krr3/pppq1ppp/1bn5/3n4/QPN1p1b1/P2PPN2/1B3PPP/R3KB1R w KQ -
+Sicilian: Najdorf, Ivkov variation *
+2r1kb1r/1pq2ppp/p1n1pn2/2pp4/3P2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack, Gr\"unfeld variation *
+2r1kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack (with Rc1) *
+2r1kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Rubinstein attack, Karlsbad variation *
+2r1kb1r/ppq2ppp/2n1pn2/2ppN3/3P2b1/2P1P3/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Rubinstein attack, Wolf variation *
+2r1kb1r/ppq2ppp/2n1pn2/3p4/3p2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack, main line *
+2rq1rk1/pp2ppbp/2n2np1/2Pp4/3P2b1/2N1BN2/PP2BPPP/R2Q1RK1 b - -
+QGD: Tarrasch, Bogolyubov variation *
+2rq1rk1/pp2ppbp/2n2np1/3p4/2PP2b1/1PN1BN2/P3BPPP/R2Q1RK1 b - -
+QGD: Tarrasch, Stoltz variation *
+2rq1rk1/pp3ppp/2n1pn2/2bp4/3N4/2P1P3/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, Bd3 line, 11.O-O *
+2rq1rk1/pp3ppp/2n1pn2/2bp4/8/2P1PB1P/PP1N1PP1/R1BQ1RK1 w - -
+QGD: Petrosian variation *
+2rqk2r/pp3pp1/2n1pn2/2bp3p/3N2b1/2P1P3/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Bd3 line, Janowski variation *
+2rqk2r/pp3ppp/2n1pn2/2bp4/1P4b1/2P1PN2/P2NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Bd3 line, fianchetto variation *
+2rqk2r/pp3ppp/2n1pn2/2bp4/3N2b1/2P1P3/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Bd3 line, Capablanca freeing maneuver *
+2rqk2r/pp3ppp/2n1pn2/2bp4/3N4/2P1P3/PP1NQPPP/R1B2RK1 b k -
+QGD: Orthodox defense, Bd3 line *
+2rqk2r/pp3ppp/2n1pn2/3p4/1b1P2b1/1P3N2/P1PNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Capablanca variation *
+2rqk2r/pp3ppp/2nbpn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Bd3 line *
+2rqk2r/pp3ppp/2nbpn2/3p4/3P2b1/1P3N2/P1PNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Pillsbury attack *
+2rqk2r/pp3ppp/4pn2/2bpn3/3N4/2P1P3/PP1NQPPP/R1B2RK1 w k -
+QGD: Orthodox defense, Bd3 line, Alekhine variation *
+2rqkb1r/pp1bpppp/2n2n2/2pp4/Q2P4/2P1PN2/PP1N1PPP/R1B1KB1R w KQk -
+QGD: Rochlin variation *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, 7.Rc1 *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/P3PN2/1PPNBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Swiss (Henneberger) variation *
+2rqkb1r/pp3ppp/2n1pn2/3p4/3p2b1/P3PN2/1PPNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Swiss, Karlsbad variation *
+2rqkb1r/pp3ppp/4pn2/3p4/3P4/1P2B2P/P1P1QPP1/RN3RK1 b k -
+QGD: Tartakower variation *
+2rqkbnr/pp3ppp/2n1p3/2p2b2/2pP4/4BNP1/PP2PPBP/RN1Q1RK1 b k -
+Gr\"unfeld: Gr\"unfeld gambit, Botvinnik variation *
+2rqkbnr/pp3ppp/2n1p3/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w k -
+Gr\"unfeld: Gr\"unfeld gambit, Capablanca variation *
+2rqkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 w k -
+QGD: Anti-neo-orthodox variation *
+3q1rk1/pp3ppp/2r1p3/2b5/4Q3/2P5/PP3PPP/R1B2RK1 b - -
+QGD: Orthodox defense, classical, 13.de *
+3q1rk1/pp3ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 b - -
+QGD: Orthodox defense, classical variation *
+4rrk1/pppb2pp/2np1q2/2b2P2/4Q3/2N4B/PPPPNP1P/R1B1K2R w KQ -
+KGA: Muzio gambit, Paulsen variation *
+5rk1/5ppp/p1pbr3/1p1n3q/P2P2b1/1BPQB1P1/1P1N1P1P/R3R1K1 w - -
+Ruy Lopez: Marshall, main line, Spassky variation
+5rk1/ppq2ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, classical, 13.d1c2 (Vidmar) *
+N1bk1b1r/p2pq2p/1pnn2p1/3Qpp2/8/1B6/PPPP1PPP/R1B1K1NR w KQ -
+Vienna: `Frankenstein-Dracula' variation
+N1bk3r/pp1p1ppp/2n2n2/8/1b6/P4B1q/1PPN1P1P/R1BQK2R b KQ -
+Scotch: Berger variation
+r1b1k1nr/ppp2ppp/1bn5/3p4/4P2q/2NN4/PPPP1PPP/R1BQKB1R w KQkq -
+Vienna: Adams' gambit *
+r1b1k1nr/ppp2ppp/2n5/q3P3/1b6/2N2N2/PPPB1PPP/R2QKB1R b KQkq -
+Scandinavian: Anderssen counter-attack orthodox attack
+r1b1k1nr/pppp1ppp/1b6/8/3qPP2/1PNN2P1/P2PQ2P/n1BK1B1R b kq -
+Vienna: `Frankenstein-Dracula' variation *
+r1b1k1nr/pppp1ppp/1b6/nP2N1q1/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit declined, Hirschbach variation
+r1b1k1nr/pppp1ppp/1bn5/8/4P2q/3N4/PPPPBPPP/RNBQK2R b KQkq -
+Vienna game *
+r1b1k1nr/pppp1ppp/2n2q2/1Nb5/4P3/4B3/PPP2PPP/RN1QKB1R b KQkq -
+Scotch: Blumenfeld attack
+r1b1k1nr/pppp1ppp/2n5/1N6/1b2P2q/8/PPPB1PPP/RN1QKB1R b KQkq -
+Scotch game
+r1b1k1nr/ppppqppp/1bn5/4p1B1/2BPP3/2P2N2/PP3PPP/RN1QK2R b KQkq -
+Giuoco Piano: Mestel variation
+r1b1k1nr/ppppqppp/1bn5/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: center-holding variation
+r1b1k1nr/ppppqppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical defense, Boden variation
+r1b1k1nr/ppppqppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Giuoco Piano: close variation
+r1b1k1nr/pppq1ppp/1b6/n3N3/2B1P3/BQP5/P4PPP/RN3RK1 b kq -
+Evans gambit: Levenfish variation
+r1b1k2r/1pp1qppp/pbnp1n2/4p3/P1BPP3/2P2N1P/1P3PP1/RNBQR1K1 b kq -
+Giuoco Piano: Tarrasch variation
+r1b1k2r/1pp2ppp/p1n5/2bpq3/3NP3/2P1K3/PPN3PP/R1BQ1B1R b kq -
+two knights defense: Fegatello attack, Leonhardt variation *
+r1b1k2r/1pq1bppp/p1nppn2/8/P2NPP2/2N5/1PP1B1PP/R1BQ1R1K b kq -
+Sicilian: Scheveningen, classical, Mar\'oczy system
+r1b1k2r/1pqnbppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/2KR1B1R w kq -
+Sicilian: Najdorf, 7...Be7 main line
+r1b1k2r/2q1bppp/p2p1n2/npp1p3/P2PP3/2P2N2/1PB2PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed, Balla variation
+r1b1k2r/p1q2pp1/2pb1n1p/n3N3/3Pp3/8/PPPBBPPP/RN1QK2R b KQkq -
+two knights defense: Knorre variation
+r1b1k2r/pp1n1ppp/2p1pn2/q2p2B1/1bPP4/2N1P3/PPQN1PPP/R3KB1R b KQkq -
+QGD: Cambridge Springs defense, Bogolyubov variation
+r1b1k2r/pp3ppp/1qn1p3/2bp4/6n1/5NP1/PPPNPPBP/R1BQ1RK1 w kq -
+Gr\"unfeld: Pachman variation *
+r1b1k2r/pp3ppp/3b1q2/3P4/1P2n3/4PN2/5PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Stahlberg variation *
+r1b1k2r/ppp1qppp/5n2/4p1B1/2BnP3/2N5/PPP3PP/R2Q1RK1 b kq -
+Giuoco piano: Holzhausen attack
+r1b1k2r/ppp2ppp/2N5/1B1pP3/4n2q/8/PPP2bPP/RNBQ1K1R w kq -
+Two knights defense, Keidanz variation
+r1b1k2r/ppp3p1/2np1q1p/2b1pP2/2B5/2NP1N2/PPP2PPP/R2QK2R b KQkq -
+KGD: classical, Svenonius variation *
+r1b1k2r/pppp1ppp/1bn5/8/4n2q/2NN4/PPPPBPPP/R1BQK2R w KQkq -
+Vienna: Alekhine variation *
+r1b1k2r/pppp1ppp/2n2q2/2b5/3NP3/4K3/PPP1N1PP/R1BQ1B1R b kq -
+two knights defense: Fegatello attack, Polerio defense *
+r1b1k2r/ppppnp1p/2n4b/4q3/2B2p2/2NP1Q2/PPPB2PP/4RRK1 b kq -
+KGA: Muzio gambit, Paulsen variation
+r1b1k2r/ppppnppp/2n2q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R b KQkq -
+Scotch: Paulsen attack
+r1b1k2r/ppppnppp/2n2q2/2b5/3NP3/2P1B3/PP1Q1PPP/RN2KB1R b KQkq -
+Scotch: Blackburne attack
+r1b1k2r/ppppnppp/2n2q2/2b5/4P3/2P1B3/PPN2PPP/RN1QKB1R b KQkq -
+Scotch: Meitner variation
+r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/1QN2N2/P4PPP/R1BR2K1 b kq -
+Evans gambit: compromised defense, Potter variation
+r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/BQN2N2/P4PPP/R4RK1 b kq -
+Evans gambit: compromised defense, Paulsen variation
+r1b1kb1r/1pp3pp/p1n2n2/5pq1/2BPp3/2N1PP2/PP1N2PP/R1BQ1RK1 b kq -
+French: Steinitz, Brodsky-Jones variation *
+r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b kq -
+Sicilian: Scheveningen, classical
+r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N5/PPP1B1PP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen, classical variation with ...Qc7 and ...Nc6
+r1b1kb1r/2p1nppp/p1p5/3P4/3Pp3/4P3/PPQ1NP1q/RNB1K1R1 w Qkq -
+French: Winawer, advance, poisoned pawn, Konstantinopolsky variation *
+r1b1kb1r/p1q2pp1/2p2n1p/n3N3/4p3/8/PPPPBPPP/RNBQK2R w KQkq -
+two knights defense: G\"oring variation
+r1b1kb1r/p1q2ppp/2p2n2/n3p1N1/8/3B1Q2/PPPP1PPP/RNB1K2R b KQkq -
+two knights defense: Paoli variation
+r1b1kb1r/pp1n1ppp/2p1p3/q2n2B1/3P4/2N1PN2/PP3PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense, Yugoslav variation
+r1b1kb1r/pp1n1ppp/2p1pB2/q2p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD: Cambridge Springs defense, Capablanca variation
+r1b1kb1r/pp1n1ppp/2p1pn2/q2P2B1/3P4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD: Cambridge Springs defense, 7.cd
+r1b1kb1r/pp1n1ppp/2p1pn2/q2p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense
+r1b1kb1r/pp1n1ppp/2p1pn2/q2p4/2PP4/2N2N2/PP1BPPPP/2RQKB1R b Kkq -
+QGD: Rochlin variation
+r1b1kb1r/pp1n1ppp/2p1pn2/q5B1/2pP4/2N1P3/PP1N1PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense, Rubinstein variation
+r1b1kb1r/pp1p1ppp/1qn1pn2/8/2PN4/2N3P1/PP2PP1P/R1BQKB1R w KQkq -
+English: symmetrical, Geller variation
+r1b1kb1r/pp1p1ppp/4pn2/1Bp5/3nPq2/2N2N2/PPPP1PPP/R1BQR1K1 w kq -
+English: four knights, Stean variation *
+r1b1kb1r/pp2pppp/1qn2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: Russian variation *
+r1b1kb1r/pp2pppp/1qn2n2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Reifir (Spielmann) variation
+r1b1kb1r/pp2pppp/1qnp1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin, Benk\"o variation
+r1b1kb1r/pp2pppp/2n2n2/q1pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: Flohr variation *
+r1b1kb1r/pp2pppp/2n2n2/q2p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Czerniak variation
+r1b1kb1r/pp3ppp/1qn1pn2/2pp4/3P4/4PNP1/PPP2PBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Botvinnik variation *
+r1b1kb1r/pp3ppp/1qn1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with e3 & Qb3 *
+r1b1kb1r/pp3ppp/2n2n2/2qpp1B1/8/5NP1/PPP1PPBP/RN1Q1RK1 b kq -
+Gr\"unfeld: Russian, Smyslov variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/1P3NP1/P1P1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Levenfish variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/2N2NP1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: Russian, Byrne (Simagin) variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/2P2NP1/PP2PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Szabo (Boleslavsky) variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Russian variation with e4 *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/N4NP1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: Russian, Prins variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/P4NP1/1PP1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Alekhine (Hungarian) variation *
+r1b1kb1r/pp3ppp/2n5/2pqp3/8/3P1NP1/PP2PP1P/R1BQKB1R b KQkq -
+Sicilian: accelerated fianchetto, Gurgenidze variation *
+r1b1kb1r/ppppq1pp/2n2n2/3Q4/8/5N2/PPP1PPPP/RNB1KB1R w KQkq -
+Queen's pawn: Englund gambit
+r1b1kb1r/ppppq1pp/2n2n2/4N1B1/3Pp3/8/PPP2PPP/RN1QKB1R w KQkq -
+Vienna gambit: Kaufmann variation *
+r1b1kb1r/ppppqppp/5n2/1B2N3/3nPP2/2N5/PPPP2PP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, Bogolyubov variation
+r1b1kb1r/ppq1pppp/2n2n2/1Bpp4/8/2NPPN2/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, Milner-Barry (Zurich) variation *
+r1b1kb1r/ppq2ppp/2n1pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Stoltz variation *
+r1b1kb1r/ppqp1ppp/2B1pn2/2p5/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+English: four knights, Romanishin variation *
+r1b1kbnr/1p2pppp/p1q5/2pp4/1P6/4PN2/P1PP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: classical, Adorjan gambit *
+r1b1kbnr/1p2pppp/p1q5/2pp4/3P4/2N1PN2/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, Botvinnik variation *
+r1b1kbnr/1p2pppp/p1q5/2ppN3/3P4/4P3/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation, main line *
+r1b1kbnr/1pp2ppp/p1pq4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: exchange, Bronstein variation
+r1b1kbnr/1pq1pppp/p1n5/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical, Noa variation, 5.a3 *
+r1b1kbnr/1pq1pppp/p7/2ppN3/3P4/4P3/PPP2PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical, Noa variation, main line, 7.Qc2 *
+r1b1kbnr/1pq2ppp/p3p3/2ppN3/3PP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, San Remo variation *
+r1b1kbnr/1pqp1ppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: Taimanov variation
+r1b1kbnr/2p2ppp/p1p5/3p2q1/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, poisoned pawn variation *
+r1b1kbnr/p1p2ppp/2p5/3pN1q1/3Pp3/4P2P/PPP2PP1/RNBQ1K1R w kq -
+French: MacCutcheon, Duras variation *
+r1b1kbnr/p1pp1ppp/1pn5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -
+Vienna: Steinitz gambit, Fraser-Minckwitz variation
+r1b1kbnr/pp1qpppp/2np4/1B6/3QP3/5N2/PPP2PPP/RNB1K2R w KQkq -
+Sicilian: Chekhover, Zaitsev variation
+r1b1kbnr/pp2pppp/1qn5/1Bp5/2p5/2N1PN2/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6 *
+r1b1kbnr/pp2pppp/1qn5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Spielmann variation *
+r1b1kbnr/pp2pppp/1qn5/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Russian variation *
+r1b1kbnr/pp2pppp/2nq4/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Mikenas attack *
+r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/2PB1N2/PP3PPP/RNBQK2R b KQkq -
+French: advance, Milner-Barry gambit
+r1b1kbnr/ppp1pppp/2n5/3q4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense, Marshall gambit
+r1b1kbnr/ppp1pppp/2n5/7q/8/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Novosibirsk opening *
+r1b1kbnr/ppp1qppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -
+QGD: Albin counter-gambit, Balogh variation
+r1b1kbnr/ppp2ppp/2n5/1B1p2q1/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Russian variation *
+r1b1kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPPN1PPP/RNBQKB1R w KQkq -
+French: Steinitz, Gledhill attack *
+r1b1kbnr/ppp2ppp/2n5/3p4/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -
+Vienna: Steinitz gambit, Zukertort defense
+r1b1kbnr/ppp3pp/2n2q2/3pN3/3PpP2/8/PPP3PP/RNBQKB1R w KQkq -
+Vienna gambit: Heyde variation *
+r1b1kbnr/ppp3pp/2n5/5pq1/2BPp3/4P3/PP1N1PPP/RNBQK2R w KQkq -
+French: Steinitz, Bradford attack *
+r1b1kbnr/pppnq2p/8/4Npp1/3Q1P2/8/PPP3PP/RNB1KB1R w KQkq -
+KGD: Falkbeer, Charousek variation *
+r1b1kbnr/pppp1Npp/8/8/4q3/5n2/PPPPBP1P/RNBQKR2 w Qkq -
+Blackburne shilling gambit
+r1b1kbnr/pppp1p1p/2n5/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq -
+KGA: Herzfeld gambit
+r1b1kbnr/pppp1p1p/5q2/4n3/2B1PQ2/2N5/PPPP2PP/R1B2RK1 w kq -
+Vienna: Hamppe-Muzio, Dubois variation
+r1b1kbnr/pppp1ppp/2n2q2/4p3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Goldman (Spielmann) variation *
+r1b1kbnr/pppp1ppp/2n5/1B2p1q1/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Vienna: Zhuravlev countergambit *
+r1b1kbnr/pppp1ppp/2n5/1N6/4P2q/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Horwitz attack
+r1b1kbnr/pppp1ppp/2n5/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Boden defense
+r1b1kbnr/pppp1ppp/2n5/8/3NP2q/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Scotch: Steinitz variation
+r1b1kbnr/pppp1ppp/2n5/8/3NP2q/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Pulling counter-attack
+r1b1kbnr/pppp1ppp/2n5/8/4P2q/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Fraser attack
+r1b1kbnr/pppp2pp/2n2q2/4N3/3Pp3/8/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit: Paulsen attack *
+r1b1kbnr/pppp2pp/2n2q2/4N3/3PpP2/8/PPP3PP/RNBQKB1R b KQkq f3
+Vienna gambit: Bardeleben variation *
+r1b1kbnr/ppppq1pp/2n5/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Rubinstein variation *
+r1b1kbnr/ppppqppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Vinogradov variation
+r1b1kbnr/ppq1pppp/2n5/1B1p4/3P4/5N2/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation, 5.cd ed *
+r1b1kbnr/ppq1pppp/2n5/1Bp5/2p5/4PN2/PP1P1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: classical, Pir\'c variation *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, 4...c5 *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/8/2N1PN2/PPPP1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, 4...Nc6 *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical variation *
+r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Taimanov variation
+r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Taimanov (Bastrikov) variation
+r1b1kbnr/ppqppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Flohr variation
+r1b2knr/pppp3p/2n2qP1/2b1p2Q/6P1/8/PPPP1PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, Fraser variation *
+r1b2rk1/1p2qp1p/2n1pn2/pBbpN1p1/5B2/2P1P3/PP3PPP/RN1Q1RK1 w - -
+QGD Slav: Dutch, S\"amisch variation *
+r1b2rk1/1p2qppp/2n1pn2/pBbp4/5B2/2P1PN2/PP3PPP/RN1Q1RK1 w - -
+QGD Slav: Dutch variation, main line *
+r1b2rk1/1pp1qppp/2n2n2/p1bPp3/8/2PP1N2/PP1NBPPP/R1BQ1RK1 b - -
+Philidor: Nimzovich, Sozin variation *
+r1b2rk1/1pq1bppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R3QRK1 w - -
+Sicilian: Scheveningen, classical main line
+r1b2rk1/2q1bppp/p1np1n2/1pP1p3/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 b - -
+Ruy Lopez: closed, Chigorin, Rauzer attack
+r1b2rk1/2q1bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Chigorin, 12...Nc6
+r1b2rk1/2q1bppp/p1pp1n2/np2p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Rossolimo defense
+r1b2rk1/2q1bppp/p2p1n2/np2p3/3PP3/5N1P/PPBN1PP1/R1BQR1K1 b - -
+Ruy Lopez: closed, Chigorin, 12...c5d4
+r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Chigorin defense
+r1b2rk1/5ppp/p1pb4/1p1n4/3P4/1BP3Pq/PP3P1P/RNBQR1K1 w - -
+Ruy Lopez: Marshall, main line, 14...Qh3
+r1b2rk1/p1q2ppp/2n2n2/3pp3/N7/1B1P4/PPPB1bPP/R2Q1KNR w - -
+Evans gambit: Fraser-Mortimer attack *
+r1b2rk1/p4ppp/1qB2n2/2bp4/3P4/2N5/PPP2PPP/R1BQK2R b KQ -
+Giuoco Piano: Bernstein variation *
+r1b2rk1/p4ppp/2n2n2/q1bpp1B1/8/1BNP4/PPP2PPP/R2QK1NR w KQ -
+Evans gambit: Fraser attack *
+r1b2rk1/pp1n1ppp/2p1pn2/q2p4/1bPP3B/2N1P3/PPQN1PPP/R3KB1R b KQ -
+QGD: Cambridge Springs defense, Argentine variation
+r1b2rk1/pp1nqppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2Q1RK1 w - -
+Ruy Lopez: open, Malkin variation *
+r1b2rk1/pp1nqppp/2n1p3/3pP3/2pP1P2/2N2N2/PPPQ2PP/2KR1B1R w - -
+French: classical, St\a hlberg variation
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -
+QGD: Orthodox defense, Bd3 line, 11.O-O
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BPN3/4PN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line, Alekhine variation
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/1Q3RK1 b - -
+QGD: Orthodox defense, classical, 13.d1b1 (Mar\'oczy)
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w - -
+QGD: Orthodox defense, classical variation
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PPQ2PPP/5RK1 b - -
+QGD: Orthodox defense, classical, 13.d1c2 (Vidmar)
+r1b2rk1/pp2nppp/2pq1n2/3pp1B1/1b2P2N/1BNP4/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Blake variation
+r1b2rk1/pp2ppbp/1qnp1np1/4P3/3N1P2/2N1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Zollner gambit
+r1b2rk1/pp2ppbp/2nq1np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Botvinnik variation *
+r1b2rk1/pp2ppbp/2q2np1/2pp4/8/1P2P3/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: old main line, 9.Qxc3 *
+r1b2rk1/pp2qppp/1bn2n2/4p3/1P6/P1NPP3/R4PPP/2BQKBNR b K -
+Sicilian: Smith-Morra gambit, Chicago defense *
+r1b2rk1/pp2qppp/2n1pn2/2bp4/2P1P3/2NB1N2/PP2QPPP/R1B2RK1 b - -
+QGD: Semi-Tarrasch, Levenfish variation
+r1b2rk1/pp2qppp/2nb1n2/2p1p3/2BP4/2N1PN2/PP2QPPP/R1B2RK1 w - -
+QGD: Semi-Tarrasch, Levenfish variation *
+r1b2rk1/pp3ppp/2p5/4q3/2B5/2R1P3/PP3PPP/3Q1RK1 w - -
+QGD: Orthodox defense, classical, 13.de
+r1b2rk1/ppp1qppp/2n2n2/1B1pp3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 w - -
+Four knights: Alatortsev variation
+r1b2rk1/ppp1qppp/2np1n2/1B2p1B1/4P3/2PP1N2/P1P2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Metger unpin
+r1b2rk1/pppp2pp/2n5/2b1pq2/4N3/5Q2/PPPP1P1P/R1B1KBNR b KQ -
+Vienna: Hamppe-Muzio, Dubois variation *
+r1b2rk1/ppq1ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky variation with Qc2 *
+r1b2rk1/ppqnppbp/5np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, main line *
+r1b3nr/ppppkBpp/1b6/nP2N1qQ/4P3/8/P1PP1PPP/RNB1K2R b KQ -
+Evans gambit declined, V\'asquez variation
+r1b3r1/ppp2k1p/1b6/nP2B1q1/3PP3/8/P1PN1PPP/R2QK2R b KQ -
+Evans gambit declined, Pavlov variation
+r1bB1rk1/pp3ppp/8/4p3/3nn3/3P4/PPP1KbPP/R2Q1BNR w - -
+Scotch: Sea-cadet mate *
+r1bk1bnr/2p2ppp/p1p5/3P4/3Pp3/4P3/PPQ1NP1q/RNB1K1R1 w Q -
+French: Winawer, advance, poisoned pawn, Euwe-Gligori\'c variation *
+r1bk2nr/pppp1Qpp/1b6/nP2q3/2B1P3/8/PBPP1PPP/RN2K2R b KQ -
+Evans gambit declined, Hicken variation
+r1bk2nr/pppp1ppp/2n3q1/1N6/8/8/PPPNBPPP/R2Q1RK1 w - -
+Scotch: Rosenthal variation
+r1bk2nr/ppppq1pp/2n5/2b1PP1Q/8/8/PPPP2PP/RNBK1BNR b - -
+KGA: L\'opez-Gianutio counter-gambit, Hein variation *
+r1bnk2r/ppppnppp/5q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R w KQkq -
+Scotch: Paulsen, Gunsberg defense
+r1bq1b1r/ppn3pp/2p1k3/3np3/2BPQ3/P1N5/1PP2PPP/R1B1K2R w KQ -
+two knights defense: Fegatello attack, Leonhardt variation
+r1bq1b1r/ppp1n1pp/4k3/3np3/2B5/2N2Q2/PPPP1PPP/R1B1K2R w KQ -
+two knights defense: Fegatello attack, Polerio defense
+r1bq1b1r/ppp2kp1/2n5/1B1p1PPp/3Qn3/5N2/PPP2P1P/RNB1K2R w KQ -
+KGA: Kieseritsky, Brentano defense, Kaplanek variation *
+r1bq1bnr/ppp1k1pp/2n5/3ppP1Q/3P4/2N5/PPP2PPP/R1B1KBNR b KQ -
+Vienna: Steinitz gambit, Zukertort defense *
+r1bq1bnr/ppp1k1pp/2n5/3ppP1Q/8/1PN5/P1PP1PPP/R1B1KBNR b KQ -
+Vienna: Steinitz gambit, Fraser-Minckwitz variation *
+r1bq1k1r/2p2ppp/p4n2/1pbPR1N1/3n4/1B6/PPPP1PPP/RNBQ2K1 w - -
+Ruy Lopez: Rabinovich variation
+r1bq1k1r/pp2nppp/2n5/4p3/2Pp4/3P1NP1/4PP1P/RN1QKB1R w KQ -
+Benk\"o gambit: Ne2 variation *
+r1bq1knr/pp3p1p/2n3p1/4p3/2Pp4/3P1NP1/4PP1P/RN1QKB1R w KQ -
+Benk\"o gambit *
+r1bq1knr/ppp3pp/2n5/2bp1P1Q/4p1P1/3P4/PPP2PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, Grimm attack *
+r1bq1knr/ppp3pp/2n5/2bppP1Q/6P1/8/PPPPNPBP/RNB1K2R b KQ -
+KGA: bishop's gambit, classical defense *
+r1bq1knr/ppp4p/2n3p1/2bppP1Q/6P1/8/PPPPNPBP/RNB1K2R w KQ -
+KGA: bishop's gambit, McDonnell attack *
+r1bq1knr/pppp3p/2n3p1/2b1pP1Q/6P1/8/PPPP1PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, McDonnell attack *
+r1bq1r1k/1pp1b1pp/2n5/p2npp2/8/P1NPPN2/1PQ1BPPP/R1B1K2R w KQ -
+Sicilian: Scheveningen, classical, Mar\'oczy system *
+r1bq1rk1/1p1n1pbp/2pp1np1/p3p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 w - -
+King's Indian: orthodox, 7...Nbd7, main line
+r1bq1rk1/1p1nbppp/p1p1pn2/3P2B1/3P4/2N1PN2/PPQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack, main line
+r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R w K -
+QGD: Orthodox defense, Rubinstein attack, Karlsbad variation
+r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/P1N1PN2/1PQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack, Gr\"unfeld variation
+r1bq1rk1/1p1nppbp/2n3p1/p7/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 b - -
+Benoni: fianchetto, 11...Re8 *
+r1bq1rk1/1p2bppp/2n2n2/p3p1B1/2Pp4/P2P1NP1/1P3PBP/RN1Q1RK1 b - -
+Benoni: classical with ...a6 and 10...Bg4 *
+r1bq1rk1/1p2bppp/2n2n2/p3p3/2Pp4/P2P1NP1/1P3PBP/RNBQ1RK1 w - -
+Benoni: classical, 9...a6, 10.a4 *
+r1bq1rk1/1p2ppbp/2np1np1/p7/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -
+Sicilian: dragon, Yugoslav attack, Byrne variation
+r1bq1rk1/1p2ppbp/2np1np1/p7/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Alekhine variation
+r1bq1rk1/1p3ppp/2n1pn2/pBbp4/5B2/2P1PN2/PP3PPP/RN1QK2R w KQ -
+QGD Slav: Dutch variation *
+r1bq1rk1/1p3ppp/p1n1pn2/1BbP4/8/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd *
+r1bq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Panno variation
+r1bq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, Panno formation
+r1bq1rk1/1pp2ppp/1bn5/p2PN3/1P1P4/P7/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Berger variation *
+r1bq1rk1/1ppnbppp/p3pn2/3P2B1/3P4/2N1PN2/PP3PPP/2RQKB1R b K -
+QGD: Orthodox defense, Swiss, Karlsbad variation
+r1bq1rk1/1ppnbppp/p3pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -
+QGD: Orthodox defense, Swiss (Henneberger) variation
+r1bq1rk1/2p1bpp1/p1np1n1p/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Smyslov defense
+r1bq1rk1/2p1bppp/2np1n2/pp2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Keres (9...a5) variation
+r1bq1rk1/2p1bppp/p1n2n2/1p1P4/4p3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: Marshall, Herman Steiner variation
+r1bq1rk1/2p1bppp/p1n2n2/1p1pp3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: Marshall counter-attack
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/3PP3/1BP2N2/PP3PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, 9.d4
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, 9.h3
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: closed (with ...d6)
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BPP1N2/PP3PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Pilnik variation
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/2P2N2/PPBP1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Lutikov variation
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/PBP2N2/1P1P1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Suetin variation
+r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 b - -
+Ruy Lopez: closed (9...Na5)
+r1bq1rk1/2pnbppp/p1np4/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Ragozin-Petrosian (`Keres') variation
+r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP2N/1BP4P/PP3PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, Breyer, Simagin variation
+r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Breyer, Borisenko variation
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w - -
+Ruy Lopez: closed, 7...O-O
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w - -
+Ruy Lopez: Worrall attack, sharp line
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, 8.c3
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, anti-Marshall 8.a4
+r1bq1rk1/3nbppp/p2p4/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Keres (...Nd7) defense
+r1bq1rk1/4bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Borisenko defense
+r1bq1rk1/4bppp/p1p5/1p1nR3/3P4/1BP5/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: Marshall, main line, 12.d2d4
+r1bq1rk1/4bppp/p1p5/1p1nR3/8/1BP5/PP1P1PPP/RNBQ2K1 w - -
+Ruy Lopez: Marshall counter-attack, 11...c6
+r1bq1rk1/4bppp/p2p1n2/npp1p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed (10...c5)
+r1bq1rk1/4bppp/ppnppn2/8/2P1P3/N1N5/PP2BPPP/R1BQ1RK1 w - -
+Sicilian, Sz\'en, hedgehog variation
+r1bq1rk1/5ppp/p1p1pn2/2bp4/2P5/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line *
+r1bq1rk1/5ppp/p1pbpn2/2pp4/2PP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 8...Bxc3 *
+r1bq1rk1/5ppp/p2b4/1p1p4/3P4/2P1R3/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: Marshall, Kevitz variation
+r1bq1rk1/p1p2ppp/2pp1n2/4p3/1b1PP3/2N2N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: Svenonius variation *
+r1bq1rk1/p1pnbppp/1p3n2/1B1p2B1/3P4/2N1PN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Capablanca variation
+r1bq1rk1/p1pnbppp/1p3n2/3p2B1/3P4/2NBPN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Pillsbury attack
+r1bq1rk1/p1ppbppp/8/2p1P3/3B4/2N5/PPP1QPPP/R3R1K1 w - -
+Ruy Lopez: Berlin defense, Rio de Janeiro variation
+r1bq1rk1/p2nbppp/1pp1pn2/3p4/P1PP4/5NP1/1PQ1PPBP/RNBR2K1 b - -
+Catalan: closed, Zagoryansky variation
+r1bq1rk1/p2nbppp/2p1pn2/1p4B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line, fianchetto variation
+r1bq1rk1/p2pppbp/1pn2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with b3 *
+r1bq1rk1/p3bppp/2n2n2/1pp1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, bayonet attack *
+r1bq1rk1/p3nppp/2p5/2bpp3/8/1P4P1/P1PQPPBP/RNB2RK1 b - -
+Gr\"unfeld: exchange, Larsen variation *
+r1bq1rk1/p3ppbp/1pn2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky variation with b3 *
+r1bq1rk1/p4ppp/2n2n2/2bpp1B1/8/1BNP4/PPP2PPP/R2QK1NR b KQ -
+Evans gambit *
+r1bq1rk1/p4ppp/2n2n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Morphy attack *
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NPP/PP3PB1/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical main line
+r1bq1rk1/pp1n1pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Benoni: fianchetto, 9...Nbd7
+r1bq1rk1/pp1n1pp1/2p1pb1p/8/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -
+QGD: Petrosian variation
+r1bq1rk1/pp1n1ppp/1bp2n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R w KQ -
+Ruy Lopez: open, St. Petersburg variation *
+r1bq1rk1/pp1n1ppp/1bp5/3P4/1PN1p1n1/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Bernstein variation, Karpov gambit *
+r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Bronstein variation
+r1bq1rk1/pp1n1ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...Nbd7
+r1bq1rk1/pp1n2pp/2n1pp2/2bpP3/5PQ1/P1N2N2/1PP3PP/R1B1KB1R w KQ -
+French: Steinitz, Brodsky-Jones variation
+r1bq1rk1/pp1nb1pp/2n2p2/4p3/2Pp4/N2P1NP1/PP3PBP/R1BQR1K1 w - -
+Benoni: classical, 11.f3 *
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 w - -
+Benoni: classical, 9...Re8, 10.Nd2 *
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/N2P1NP1/PP3PBP/R1BQR1K1 b - -
+Benoni: classical with ...Re8 and ...Na6 *
+r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP3P/2N1PN2/PP3PP1/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line, Janowski variation
+r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line, Capablanca freeing maneuver
+r1bq1rk1/pp1nbppp/2p1p3/3p2B1/2PPn3/2N1PN2/PPQ2PPP/2R1KB1R w K -
+QGD: Orthodox defense, Rubinstein attack, Wolf variation
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -
+QGD: Orthodox defense
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack (with Rc1)
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2NBPN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 b - -
+Catalan: closed, Qc2 & b3
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/2NQ1NP1/PP2PPBP/R1B2RK1 b - -
+Catalan: closed, Botvinnik variation
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 b - -
+Catalan: closed, main line
+r1bq1rk1/pp1nbppp/2p4n/3pp1N1/2BPPP2/2P5/PP4PP/RNBQ1RK1 w - -
+Philidor: Hanham, Berger variation
+r1bq1rk1/pp1nbppp/2pp1n2/8/P1BpP3/2N2N2/1PP1QPPP/R1B2RK1 w - -
+Philidor: Nimzovich, Sozin variation
+r1bq1rk1/pp1nbppp/4pn2/2pP2B1/3P4/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)
+r1bq1rk1/pp1p1ppp/2n1pn2/2p5/2PP4/P1PBP3/5PPP/R1BQK1NR w KQ -
+Nimzo-Indian: S\"amisch, main line
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1P2PN2/PB1PBPPP/RN1QK2R b KQ -
+English: symmetrical, hedgehog system *
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1PN2NP1/P2PPPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with b3
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with d3
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with d4
+r1bq1rk1/pp1pppbp/2n2np1/8/2PN4/2N1P3/PP2BPPP/R1BQK2R b KQ -
+English: Symmetrical, Keres defense *
+r1bq1rk1/pp2b1pp/2n2n2/2pp4/4pB2/1N2PP2/PPP1B1PP/RN1Q1RK1 b - -
+Alekhine's defense: four pawns attack, Korchnoi variation *
+r1bq1rk1/pp2bppp/2n1pn2/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQR1K1 b - -
+R\'eti: King's Indian attack, French variation
+r1bq1rk1/pp2bppp/2n2n2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 b - -
+QGD: Tarrasch, Prague variation, 9.Bg5
+r1bq1rk1/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+QGD: Tarrasch, Prague variation, Normal position
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/2PP1NP1/PP3PBP/RNBQ1RK1 b - -
+King's Indian: orthodox, Donner variation *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w - -
+King's Indian: orthodox variation *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, 7...Nbd7 *
+r1bq1rk1/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 w - -
+Benoni: classical, 9.O-O *
+r1bq1rk1/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 b - -
+Benoni: classical, 9...Re8 *
+r1bq1rk1/pp2bppp/2np1n2/4p1B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w - -
+Sicilian: Richter-Rauzer, Rauzer attack, Geller variation
+r1bq1rk1/pp2bppp/2nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4
+r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/1BN1B3/PPP3PP/R2QK2R b KQ -
+Sicilian: Sozin, Fischer variation
+r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: modern Scheveningen, main line
+r1bq1rk1/pp2bppp/3ppn2/6B1/3QPP2/2N5/PPP3PP/2KR1B1R b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
+r1bq1rk1/pp2bppp/3ppn2/6B1/3nPP2/2N5/PPPQ2PP/2KR1B1R w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
+r1bq1rk1/pp2bppp/n1n5/2p1p3/8/PPNPPN2/4BPPP/R1BQ1RK1 b - -
+Sicilian, Sz\'en, hedgehog variation *
+r1bq1rk1/pp2ppbp/2n2np1/2p5/2Pp4/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Yugoslav Panno *
+r1bq1rk1/pp2ppbp/2n2np1/2pp2B1/8/2NP1NP1/PPP1PPBP/R2Q1RK1 b - -
+King's Indian: fianchetto, Simagin variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with d4 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 w - -
+King's Indian: fianchetto, Yugoslav, 7.O-O *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/3P1P2/2P1PN2/PP2B1PP/RNBQ1RK1 b - -
+Dutch: stonewall with Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 w - -
+Dutch: stonewall with Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Uhlmann (Szabo) variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5B2/2NP1NP1/PPP1PPBP/R2Q1RK1 b - -
+King's Indian: fianchetto, lesser Simagin (Spassky) variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5B2/2PP1NP1/PP2PPBP/RN1Q1RK1 b - -
+King's Indian: fianchetto, Larsen system *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/2NP1NP1/PPP1P1BP/R1BQ1RK1 b - -
+Dutch: Leningrad, main variation with Nc6 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/2PP1NP1/PP2P1BP/RNBQ1RK1 b - -
+Dutch: Leningrad, main variation with c6 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 b - -
+Dutch: Ilyin-Genevsky variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/8/1P2PN2/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: old main line, 7.Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/8/P1NP1NP1/1PP1PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Panno variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/Q7/2PP1NP1/PP2PPBP/RNB2RK1 b - -
+King's Indian: fianchetto, Kavalek (Bronstein) variation *
+r1bq1rk1/pp2ppbp/2n2np1/3p4/2PN4/6P1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+QGD: Tarrasch, Prague variation, Normal position *
+r1bq1rk1/pp2ppbp/2n2np1/8/2Pp4/3P1NP1/PP1N1PBP/R1BQ1RK1 b - -
+Benoni: fianchetto, 9...Nbd7 *
+r1bq1rk1/pp2ppbp/2n3p1/8/2BPP3/4B3/P3NPPP/R2Q1RK1 b - -
+Gr\"unfeld: Spassky variation, main line, 10...cd, 11.cd
+r1bq1rk1/pp2ppbp/2np1np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with d3 *
+r1bq1rk1/pp2ppbp/2np1np1/2pP4/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Yugoslav Panno
+r1bq1rk1/pp2ppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R b KQ -
+Sicilian: dragon, Yugoslav attack, 9.Bc4
+r1bq1rk1/pp2ppbp/2np1np1/8/2PNPP2/2N1B3/PP2B1PP/R2QK2R b KQ -
+King's Indian: Four pawns attack, main line
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/2KR3R b - -
+Sicilian: dragon, classical, Grigoriev variation
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R4RK1 b - -
+Sicilian: dragon, classical, Richter variation
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/2KR1B1R b - -
+Sicilian: dragon, Yugoslav attack, Rauser variation
+r1bq1rk1/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 b - -
+Sicilian: dragon, classical, 9.Nb3
+r1bq1rk1/pp2ppbp/5np1/n7/2BP4/2N2N2/PP3PPP/R1BQ1RK1 w - -
+QGD: Tarrasch, R\'eti variation *
+r1bq1rk1/pp3pb1/2n2npp/2ppp3/4P3/2PP1NP1/PP1N1PBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical main line *
+r1bq1rk1/pp3pbp/2n2np1/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical variation, 8.e4 *
+r1bq1rk1/pp3ppp/2B2n2/2b1N3/3p4/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: M\"oller (Therkatz) attack *
+r1bq1rk1/pp3ppp/2B2n2/2bpN3/8/2N5/PPPP1PPP/R1BQK2R b KQ -
+Giuoco Piano *
+r1bq1rk1/pp3ppp/2N2n2/1Bbp4/8/2N5/PPPP1PPP/R1BQK2R b KQ -
+Giuoco Piano: Greco variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP1N1PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Bronstein variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP2QPPP/RNB2RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Smyslov variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP3PPP/RNBQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...dc *
+r1bq1rk1/pp3ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line
+r1bq1rk1/pp3ppp/2n1pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 7...Nc6
+r1bq1rk1/pp3ppp/2n1pn2/2pp4/2PP4/P1PBPN2/5PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 8...Bxc3
+r1bq1rk1/pp3ppp/2n1pn2/8/1bBp4/P1N1PN2/1P3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd
+r1bq1rk1/pp3ppp/2n2n2/2bp4/N7/5NP1/PP2PPBP/R1BQ1RK1 b - -
+QGD: Tarrasch, R\'eti variation
+r1bq1rk1/pp3ppp/2nbpn2/1BPp4/8/2N1PN2/PPP2PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Ragozin variation *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/1P2PN2/P4PPP/RNBQ1RK1 b - -
+Nimzo-Indian: 4.e3, Keres variation *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 7...Nc6 *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/4PN2/PP1N1PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...Nbd7 *
+r1bq1rk1/pp3ppp/2nbpn2/2pp2B1/3P4/2P2NP1/PP2PPBP/RN1Q1RK1 b - -
+Gr\"unfeld: Smyslov defense *
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 b - -
+QGD: Semi-Tarrasch, symmetrical variation *
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+QGD: Semi-Tarrasch, symmetrical variation
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/3P1B2/2P2NP1/PP2PPBP/RN1Q1RK1 b - -
+Gr\"unfeld: Flohr defense *
+r1bq1rk1/pp3ppp/3b4/3P4/1P2n3/4PN2/5PPP/R1BQKB1R w KQ -
+QGD semi-Slav: Meran, Sozin variation *
+r1bq1rk1/pp4bp/2nppnp1/2p5/2P1PPPP/2N5/PP2B3/R1BQK1NR b KQ -
+King's Indian: Six pawns attack
+r1bq1rk1/ppbn1Npp/2p2n2/8/1PBPp3/P1N1B3/2P2PPP/R2Q1RK1 b - -
+Ruy Lopez: open, Dilworth variation *
+r1bq1rk1/ppp1b1pp/2n5/3npp2/8/P1NPPN2/1PQ2PPP/R1B1KB1R b KQ -
+Sicilian: Scheveningen, classical variation with ...Qc7 and ...Nc6 *
+r1bq1rk1/ppp1bppp/2n1pn2/8/3PN3/P5N1/1PP1BPPP/R1BQK2R w KQ -
+French: Winawer, Alekhine gambit, Alatortsev variation
+r1bq1rk1/ppp1bppp/2n5/3np3/8/P2PPN2/1P1N1PPP/R1BQKB1R b KQ -
+Sicilian: Scheveningen, classical, Nd7 system *
+r1bq1rk1/ppp1bppp/2n5/3np3/8/P2PPN2/1PQ2PPP/RNB1KB1R b KQ -
+Sicilian: Scheveningen (Paulsen), classical variation *
+r1bq1rk1/ppp1npbp/3p1np1/3Pp3/1PP1P3/2N2N2/P3BPPP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, bayonet attack
+r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP2BPPP/R1BQNRK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, 9.Ne1
+r1bq1rk1/ppp1nppN/3p4/3P4/2B1R3/8/PP3PPP/R2Q2K1 b - -
+Giuoco Piano: Therkatz-Herzog variation
+r1bq1rk1/ppp1nppp/3p1n2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Pillsbury variation
+r1bq1rk1/ppp1nppp/3p1n2/1B2p3/1b1PP3/2N2N2/PPP1QPPP/R1B2RK1 b - -
+Four knights: Alatortsev variation *
+r1bq1rk1/ppp1nppp/3p1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: symmetrical, Mar\'oczy system *
+r1bq1rk1/ppp1p1bp/2np1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Leningrad, main variation with Nc6
+r1bq1rk1/ppp1ppbp/2n2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Byrne (Simagin) variation
+r1bq1rk1/ppp1ppbp/2n3p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Simagin's improved variation
+r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto with ...Nc6
+r1bq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, 6...Nc6
+r1bq1rk1/ppp1ppbp/n2p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Kazakh variation
+r1bq1rk1/ppp1ppbp/n4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Prins variation
+r1bq1rk1/ppp2pbp/2np1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Uhlmann (Szabo) variation
+r1bq1rk1/ppp2pbp/2np1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)
+r1bq1rk1/ppp2ppp/1b1p1n2/4p3/N3P3/3P1B2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: Rubinstein counter-gambit Mar\'oczy variation
+r1bq1rk1/ppp2ppp/2Bp1n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights *
+r1bq1rk1/ppp2ppp/2n1pn2/8/1bpP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Ragozin variation
+r1bq1rk1/ppp2ppp/2n2n2/1B1pp3/4P3/2PP1N2/P1P2PPP/R1BQ1RK1 w - -
+Four knights: Svenonius variation
+r1bq1rk1/ppp2ppp/2n2n2/3Pp3/1b6/2NP1N2/PPPB1PPP/R2QKB1R b KQ -
+Ruy Lopez: closed Berlin defense, Wolf variation *
+r1bq1rk1/ppp2ppp/2n2n2/3pp3/1b2P3/2NP1N2/PPPBBPPP/R2QK2R b KQ -
+Ruy Lopez: Berlin defense, hedgehog variation *
+r1bq1rk1/ppp2ppp/2n2n2/3pp3/4P3/2bP1N2/PPPBBPPP/R2QK2R w KQ -
+Ruy Lopez: closed Berlin defense, Showalter variation *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: double Ruy Lopez *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: symmetrical variation *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: symmetrical variation
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 b - -
+Four knights: symmetrical, Mar\'oczy system
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/4P3/2PP1N2/P1P2PPP/R1BQR1K1 b - -
+Four knights: Janowski variation
+r1bq1rk1/ppp2ppp/3p1b2/n3p3/4P3/1B1P1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: Rubinstein counter-gambit Mar\'oczy variation *
+r1bq1rk1/ppp3pp/2n2P2/2bp1PB1/8/2p5/PPP2P1P/R2QKBNR w KQ -
+Vienna: Pierce gambit, Rushmere attack *
+r1bq1rk1/ppp3pp/2n5/1B1p1p2/1b2p3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Bardeleben variation *
+r1bq1rk1/pppn1pb1/3p3p/3Pp1pn/2P1P2P/2N2NB1/PP2BPP1/R2QK2R b KQ -
+King's Indian: Petrosian system, Keres variation
+r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Petrosian system, main line
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical variation
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, 7...Nbd7
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQR1K1 b - -
+King's Indian: orthodox, 7...Nbd7, 8.Re1
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2NP1/PP3PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical variation, 8.e4
+r1bq1rk1/pppn1ppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Bernstein variation *
+r1bq1rk1/pppnbBpp/3p1n2/4p1N1/3PP3/2N5/PPP2PPP/R1BQK2R b KQ -
+Philidor: Nimzovich, L\"arobok variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/1QN1PN2/PP3PPP/R3KB1R b KQ -
+QGD: Orthodox defense, Rauzer variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R b K -
+QGD: Orthodox defense, 7.Rc1
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Orthodox defense
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Orthodox defense, Rubinstein variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2NBPN2/PP3PPP/R2QK2R b KQ -
+QGD: Orthodox defense, Botvinnik variation
+r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Catalan: closed, 6...Nbd7
+r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PPQ1PPBP/RNB2RK1 b - -
+Catalan: closed, 7.Qc2
+r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P1P1/2N2P2/PP2B2P/R1BQNRK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, Benk\"o attack
+r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P3/2N2P2/PP2B1PP/R1BQNRK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, main line
+r1bq1rk1/pppnppbp/3p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto with ...Nd7
+r1bq1rk1/pppnppbp/5np1/6N1/2BP4/1QN1P3/PP3PPP/R1B1K2R b KQ -
+Gr\"unfeld: Pachman variation
+r1bq1rk1/pppp1ppp/1bn2n2/1B2p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 w - -
+Ruy Lopez: classical defense, Benelux variation
+r1bq1rk1/pppp1ppp/2B2n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Nimzovich (Paulsen) variation
+r1bq1rk1/pppp1ppp/2n2n2/1B2P3/1b1P1P2/2N5/PPP3PP/R1BQ1RK1 w - -
+Four knights: Bardeleben variation
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: double Ruy Lopez
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2b2N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Nimzovich (Paulsen) variation *
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2bP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights
+r1bq1rk1/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQ -
+Four knights: Rubinstein counter-gambit, Henneberger variation *
+r1bq1rk1/pppp1ppp/2n2n2/b3N3/2BPP3/2P5/P4PPP/RNBQ1RK1 b - -
+Evans gambit: Richardson attack
+r1bq1rk1/pppp1ppp/2n2n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Knorre variation *
+r1bq1rk1/pppp1ppp/2n5/1B1P4/1b2p3/5N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Gunsberg counter-attack
+r1bq1rk1/pppp1ppp/2n5/3Np3/1bB1n3/5N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Marshall variation *
+r1bq1rk1/pppp1ppp/5n2/1B2P3/1b1p4/2N5/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Gunsberg counter-attack *
+r1bq1rk1/pppp1ppp/5n2/1Bb1N3/3nP3/2N5/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Marshall variation
+r1bq1rk1/pppp1ppp/5n2/4n1N1/1bB5/8/PB3PPP/RN1Q1RK1 w - -
+Scotch gambit: Hanneken variation
+r1bq1rk1/pppp2pp/2n2n2/2b1pPP1/8/2N5/PPPP1P1P/R1BQKBNR w KQ -
+Vienna: Hamppe-Muzio gambit *
+r1bq2k1/pp3p1p/5n2/2b1r1p1/3p4/3P1B2/PPP1NPPP/R1BQK2R w KQ -
+Giuoco Piano: M\"oller, bayonet attack *
+r1bq3r/pp3pkp/2n2np1/4p3/2Pp4/3P1NP1/4PPBP/RN1Q1RK1 w - -
+Benk\"o gambit: main line *
+r1bq3r/ppp2k1p/2n3p1/2Qp4/3pP3/8/PPP2PPP/RNB1K2R w KQ -
+Scotch gambit: Cochrane-Shumov defense
+r1bq3r/ppp3pp/5k2/3pN3/1n1Pn3/1Q3P2/PP4PP/RN2K2R b KQ -
+Giuoco Piano: Krause variation
+r1bqk1nr/1ppp1ppp/p1n5/2b1p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Classical defense deferred
+r1bqk1nr/1ppp1ppp/p1n5/4p3/Bb2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Alapin's defense deferred
+r1bqk1nr/1ppp1ppp/pbn5/4p3/PPB1P3/2N2N2/2PP1PPP/R1BQK2R b KQkq -
+Evans gambit declined, Showalter variation
+r1bqk1nr/2pp1ppp/p1n5/1pb1p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Graz variation
+r1bqk1nr/5ppp/p1pbp3/2pp4/2P5/2N1PN2/PP1P1PPP/R1BQ1RK1 b kq -
+Nimzo-Indian: S\"amisch, main line *
+r1bqk1nr/5ppp/p1pbp3/2pp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3, Botvinnik system *
+r1bqk1nr/p1pp1ppp/2n5/bp2p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit: Leonhardt variation
+r1bqk1nr/p4ppp/2p5/2bpp3/8/6P1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: exchange, classical variation *
+r1bqk1nr/pp1n1ppp/2pb4/3p4/2PPp3/1P2P3/P2N1PPP/RNBQKB1R b KQkq -
+French: Tarrasch, Botvinnik variation *
+r1bqk1nr/pp1n1ppp/2pb4/3p4/2PPp3/2N1P3/PP1N1PPP/R1BQKB1R b KQkq -
+French: Tarrasch, closed variation *
+r1bqk1nr/pp1nbppp/2pp4/4P3/2B1P3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Philidor: Hanham, Steiner variation
+r1bqk1nr/pp1p1pbp/2n1p1p1/2p2P2/2B1P3/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+Sicilian: Grand Prix attack, Schofman variation
+r1bqk1nr/pp1p1pbp/2n1p1p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system reversed *
+r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/1P2P3/5N2/P1PP1PPP/RNBQR1K1 b kq -
+Sicilian: Nimzovich-Rossolimo attack, Gurgenidze variation
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+English: symmetrical, Botvinnik system reversed
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: symmetrical, Botvinnik system reversed
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical, Botvinnik system *
+r1bqk1nr/pp1p1pbp/4p1p1/2p5/3nP3/3PB1P1/PPP1NPBP/R2QK1NR b KQkq -
+Sicilian: closed, Smyslov variation
+r1bqk1nr/pp1p1ppp/2n5/2b5/2pNp3/3PP3/PPP2PPP/RNBQKB1R b KQkq -
+Alekhine's defense: two pawns' attack, Mikenas variation *
+r1bqk1nr/pp1pppbp/2N3p1/8/8/6P1/PPP1PP1P/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld, Smyslov defense *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq -
+English: symmetrical variation
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR b KQkq -
+English: ultra-symmetrical variation *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: ultra-symmetrical variation
+r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR b KQkq -
+English: closed system *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2NPB3/PPP2PPP/R2QKBNR b KQkq -
+English, Tr\"oger defense *
+r1bqk1nr/pp1pppbp/2n3p1/8/2P5/8/PPN1PPPP/RNBQKB1R b KQkq -
+English: symmetrical, Rubinstein system *
+r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/4B3/PP3PPP/RN1QKB1R b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 6.Be3
+r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 5...Bg7
+r1bqk1nr/pp1pppbp/2n3p1/8/8/1N4P1/PPP1PP1P/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld, Czech defense *
+r1bqk1nr/pp2b1pp/2n5/2pppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, 6.Be2 *
+r1bqk1nr/pp2b3/2n5/2p1pppp/2P5/2NPPNP1/PP4BP/R1BQ1RK1 w kq -
+King's Indian: Six pawns attack *
+r1bqk1nr/pp2bppp/2n5/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: 5.Be2 *
+r1bqk1nr/pp2ppbp/2n3p1/2pp4/5P2/2PP1N2/PPQ1P1PP/RNB1KB1R b KQkq -
+Dutch: Hort-Antoshin system *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQkq -
+English: closed system (without ...d6) *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR b KQkq -
+English: closed system *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -
+Sicilian: closed
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -
+Sicilian: closed, 6.Be3
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4PP2/2NP2P1/PPP3BP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.f4
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP1NPBP/R1BQK2R w KQkq -
+Sicilian: closed, 6.Ne2 e5 (Botvinnik)
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -
+English: Botvinnik system *
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4PP2/2NP2P1/PPP3BP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.f4 e5 (Botvinnik)
+r1bqk1nr/pp3ppp/2nbp3/1Bpp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5 *
+r1bqk1nr/pp3ppp/2nbp3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 *
+r1bqk1nr/pp3ppp/2nbp3/2pp4/4P3/3P1N2/PPPN1PPP/R1BQKB1R w KQkq -
+Old Indian: Dus-Khotimirsky variation *
+r1bqk1nr/pp3ppp/8/1Pb1p3/1nPp4/3P1N2/4PPPP/RNBQKB1R w KQkq -
+Benk\"o gambit: Nescaf\'e Frapp\'e attack *
+r1bqk1nr/pp4pp/2n5/4pp2/1bPp4/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: Taimanov variation *
+r1bqk1nr/ppp1bp1p/2n5/3pp1p1/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: Chinese variation *
+r1bqk1nr/ppp1bpp1/2n5/3pp2p/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: bayonet (Mariotti) attack *
+r1bqk1nr/ppp1bppp/2n5/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc defense *
+r1bqk1nr/ppp1ppbp/2np2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Modern defense: Averbakh system, Kotov variation
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+English: Botvinnik system
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq -
+Sicilian: closed *
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+English: closed system
+r1bqk1nr/ppp2ppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 b kq -
+Evans gambit: Ulvestad variation
+r1bqk1nr/ppp2ppp/1b1p4/n5B1/2BPP3/2N2N2/P4PPP/R2Q1RK1 b kq -
+Evans gambit: G\"oring attack
+r1bqk1nr/ppp2ppp/1bnp4/4p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Lasker defense
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/2N2N2/P4PPP/R1BQ1RK1 b kq -
+Evans gambit: Morphy attack
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: normal variation
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: LaBourdonnais variation
+r1bqk1nr/ppp2ppp/2n1p3/8/3Pp3/P1N5/1PP2PPP/R1BQKB1R w KQkq -
+French: Winawer, Alekhine gambit, Kan variation
+r1bqk1nr/ppp2ppp/2n5/2bpp3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -
+Evans counter-gambit
+r1bqk1nr/ppp2ppp/2n5/2bpp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Holmov system *
+r1bqk1nr/ppp2ppp/2nb4/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Swiss variation *
+r1bqk1nr/ppp2ppp/2np4/b3p1B1/2BPP3/2P2N2/P4PPP/RN1QK2R b KQkq -
+Evans gambit: Sokolsky variation
+r1bqk1nr/ppp2ppp/2np4/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 w kq -
+Evans gambit
+r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/1QP2N2/P4PPP/RNB1K2R b KQkq -
+Evans gambit: Tartakower attack
+r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/ppp2ppp/2np4/b7/2BpP3/1QP2N2/P4PPP/RNB2RK1 b kq -
+Evans gambit: Waller attack
+r1bqk1nr/ppp2ppp/3b4/3pn3/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Alekhine gambit *
+r1bqk1nr/ppp2ppp/8/2bp4/8/2P2P2/PP3PPP/RNBQKB1R w KQkq -
+Caro-Kann: Forg\'acs variation *
+r1bqk1nr/ppp3bp/2np2p1/4pp2/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.f4 e5 (Botvinnik) *
+r1bqk1nr/ppp3bp/2np2p1/4pp2/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.f4 *
+r1bqk1nr/ppp3pp/1b1p1p2/n7/2BPP3/2N1BN2/P4PPP/R2Q1RK1 b kq -
+Evans gambit: Steinitz variation
+r1bqk1nr/ppp3pp/2n5/2bppp2/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: Austrian attack, Ljubojevi\'c variation *
+r1bqk1nr/pppn1ppp/3p4/2b1p3/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -
+KGD: classical, Hanham variation
+r1bqk1nr/pppp1Bpp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Giuoco Piano: Jerome gambit
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR b Kkq -
+English: closed, 5.Rb1
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: closed system
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq -
+English: closed system (without ...d6)
+r1bqk1nr/pppp1ppp/1bn5/1B2p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical defense, Charousek variation
+r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/PBPP1PPP/RN1QK2R b KQkq -
+Evans gambit declined, Cordel variation
+r1bqk1nr/pppp1ppp/1bn5/4p3/PPB1P3/5N2/2PP1PPP/RNBQK2R b KQkq -
+Evans gambit declined, 5.a4
+r1bqk1nr/pppp1ppp/2n5/1B2p3/1b2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Alapin's defense
+r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: classical defense, 4.c3
+r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical (Cordel) defense
+r1bqk1nr/pppp1ppp/2n5/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R b KQkq -
+Evans gambit declined
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Giuoco Pianissimo
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Giuoco Piano
+r1bqk1nr/pppp1ppp/2n5/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b3N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch game
+r1bqk1nr/pppp1ppp/2n5/2b5/4P3/1N6/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Potter variation
+r1bqk1nr/pppp1ppp/2n5/4p3/1bB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/8/1b2P3/1N6/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Romanishin variation
+r1bqk1nr/pppp1ppp/2n5/8/1b2P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -
+Scotch: G\"oring gambit
+r1bqk1nr/pppp1ppp/2n5/8/1bB1P3/2P2N2/P4PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/8/1bBpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/b3P3/2B5/2P2N2/P4PPP/RNBQK2R b KQkq -
+Scotch gambit: Cochrane variation
+r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 b kq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/b7/2B1P3/2p2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: compromised defense
+r1bqk1nr/pppp1ppp/2nb4/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: Stone-Ware variation
+r1bqk1nr/pppp1ppp/8/1Bb1p3/1P1nP3/5N2/P1PP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: classical defense, Zaitsev variation
+r1bqk1nr/pppp2pp/2n5/1Bb1pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cordel gambit
+r1bqk1nr/pppp2pp/2n5/1Bb2P2/4p3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+KGA: bishop's gambit, Paulsen attack *
+r1bqk1nr/pppp2pp/2n5/2b1p1N1/2B1Pp2/3P4/PPP2PPP/RNBQK2R w KQkq -
+Giuoco Pianissimo: Dubois variation
+r1bqk1nr/pppp2pp/2n5/2b1pP2/8/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Jaenisch variation *
+r1bqk1nr/pppp2pp/2n5/2b1pP2/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+KGA: bishop's gambit, Bogolyubov variation *
+r1bqk1nr/ppppbppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Lucena defense
+r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: 5...Be7
+r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Hungarian defense
+r1bqk1nr/ppppbppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: Romanishin variation
+r1bqk1nr/ppppbppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit: Benima defense
+r1bqk1nr/ppppbppp/2n5/8/4P3/2P1Q3/PP3PPP/RNB1KBNR w KQkq -
+Center game: Charousek variation
+r1bqk1nr/ppppbppp/8/n3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit: Cordel variation
+r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2N5/PPB2PPP/R1BQK2R b KQkq -
+Sicilian: Kan, Mar\'oczy bind - Bronstein variation
+r1bqk2r/1pp1bppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQR1K1 w kq -
+Ruy Lopez: closed, Averbach variation
+r1bqk2r/1pp1bppp/p5n1/3pn3/8/2N1PN2/PPP1BPPP/R1BQ1RK1 b kq -
+French: Winawer, Alekhine gambit, Alatortsev variation *
+r1bqk2r/1ppn1p1p/p4b1Q/1B6/8/2N2N2/PP1P1PPP/n1BK3R w kq -
+Scotch: Berger variation *
+r1bqk2r/1ppp1ppp/p1n2n2/2b1p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: M\"oller defense
+r1bqk2r/1pppbppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Exchange variation doubly deferred (DERLD)
+r1bqk2r/1pppbppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: closed, center attack
+r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: closed defense
+r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB2RK1 b kq -
+Ruy Lopez: Worrall attack
+r1bqk2r/1pppbppp/p1n5/4P3/B2pn3/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: closed, Basque gambit (North Spanish variation)
+r1bqk2r/2p1bppp/p1np1n2/1p2p3/3PP3/1B3N2/PPP2PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed, 7...d6, 8.d4
+r1bqk2r/2p1bppp/p1np1n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w kq -
+Ruy Lopez: Worrall attack, solid line
+r1bqk2r/2pp1ppp/2n2n2/ppb1p3/4P3/PBN5/1PPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, Showalter variation *
+r1bqk2r/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed
+r1bqk2r/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Wing attack
+r1bqk2r/4bppp/p2p1n2/1pp5/3QP3/1B6/PPP2PPP/RNB1R1K1 w kq -
+Ruy Lopez: Noah's ark trap
+r1bqk2r/4nppp/p1pb4/2ppp3/2P5/1PN1P3/P2P1PPP/R1BQNRK1 b kq -
+Nimzo-Indian: S\"amisch, Capablanca variation *
+r1bqk2r/5ppp/p1n1pn2/1pb1P3/2B5/5N2/PP2QPPP/RNB2RK1 b kq -
+QGA: classical, Furman variation
+r1bqk2r/p1ppbppp/2p5/4Pn2/8/5N2/PPP1QPPP/RNB2RK1 w kq -
+Ruy Lopez: Berlin defense, Cordel variation
+r1bqk2r/p3nppp/2p5/2bpp3/2P5/6P1/PP2PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: exchange, Spassky variation *
+r1bqk2r/p3nppp/2p5/2bpp3/8/1P4P1/P1P1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: exchange, Simagin's lesser variation *
+r1bqk2r/p3nppp/2p5/2bpp3/8/2N3P1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: exchange, Simagin's improved variation *
+r1bqk2r/p4ppp/2pbpn2/2pp4/2P5/2NPPN2/PP3PPP/R1BQK2R b KQkq -
+Nimzo-Indian: e3, H\"ubner variation *
+r1bqk2r/pnppbppp/2p5/4P3/2P5/5N2/PP2QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Zukertort variation
+r1bqk2r/pnppbppp/2p5/4P3/3N4/8/PPP1QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Winawer attack
+r1bqk2r/pnppbppp/2p5/4P3/8/1P3N2/P1P1QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Pillsbury variation
+r1bqk2r/pp1n1ppp/2p1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Romih variation
+r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Chigorin defense
+r1bqk2r/pp1n1ppp/3bpn2/2pp4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav: Semmering variation *
+r1bqk2r/pp1n1ppp/3bpn2/2ppN3/3P1P2/2P1P3/PP4PP/RNBQKB1R b KQkq -
+QGD: Stonewall variation *
+r1bqk2r/pp1nbppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Bogolyubov variation
+r1bqk2r/pp1nnppp/3b4/3p4/3Pp3/1NN1P3/PP3PPP/R1BQKB1R b KQkq -
+French: Tarrasch, Leningrad variation *
+r1bqk2r/pp1nnppp/3b4/3p4/3Pp3/2N1P3/PP1N1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, closed variation, main line *
+r1bqk2r/pp1p1ppp/2n1p3/2P5/1bP5/1QN2N2/PP1nPPPP/R3KB1R w KQkq -
+Nimzo-Indian: Spielmann, Karlsbad variation
+r1bqk2r/pp1p1ppp/2n1p3/2n5/1bP5/1QN2N2/PP1BPPPP/R3KB1R w KQkq -
+Nimzo-Indian: Spielmann, San Remo variation
+r1bqk2r/pp1p1ppp/2n1pn2/2P5/1bP5/1QN5/PP2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6
+r1bqk2r/pp1p1ppp/2nNpn2/8/1b2P3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Taimanov, American attack
+r1bqk2r/pp1p1ppp/2nb1n2/2p1p3/8/1P2PN2/PBPP1PPP/RN1QKB1R w KQkq -
+English: Queens Indian, Romanishin variation *
+r1bqk2r/pp1p2pp/2n1p3/2n2p2/1bP5/2N2NP1/PPQBPP1P/R3KB1R b KQkq -
+Nimzo-Indian: Spielmann, St\aa hlberg variation
+r1bqk2r/pp1pnpbp/2n1p1p1/2p5/4P3/2NP2PN/PPP2PBP/R1BQK2R b KQkq -
+English: closed, Taimanov variation *
+r1bqk2r/pp1pnpbp/2n1p1p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -
+English: closed, Hort variation *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system reversed *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq -
+English: symmetrical variation *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: symmetrical variation
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical variation *
+r1bqk2r/pp1pppbp/2n2np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -
+Sicilian: accelerated fianchetto, modern variation with Bc4
+r1bqk2r/pp1pppbp/2n2np1/8/3NP3/6P1/PPP2PBP/RNBQK2R b KQkq -
+English: Anglo-Gr\"unfeld defense, Korchnoi variation *
+r1bqk2r/pp1pppbp/2n3p1/8/2PNP1n1/2N1B3/PP3PPP/R2QKB1R w KQkq -
+Sicilian: accelerated fianchetto, Breyer variation
+r1bqk2r/pp2b1pp/2n2n2/2p1pp2/2Pp4/3PPNP1/PP3PBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack *
+r1bqk2r/pp2b1pp/2n2n2/2p2p2/2PPp3/3P1NP1/PP3PBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, Florentine gambit *
+r1bqk2r/pp2b1pp/2n2n2/2pppp2/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, with Be2 and Nf3 *
+r1bqk2r/pp2b1pp/2n2n2/4pp2/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 b kq -
+Benoni: four pawns attack, main line *
+r1bqk2r/pp2bppp/2n1p3/2pn4/8/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -
+English: Symmetrical, Keres defense
+r1bqk2r/pp2bppp/2n2n2/2p1p3/3pP3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Petrosian system *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/3pP3/3P1NP1/PPPN1PBP/R1BQ1RK1 b kq -
+King's Indian: Petrosian system, main line *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/4p3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Andersson variation *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/P2pP3/3P1NP1/1PP2PBP/RNBQ1RK1 b kq -
+King's Indian: Petrosian system, Stein variation *
+r1bqk2r/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQK2R w KQkq -
+QGD: Tarrasch, Prague variation, 7...Be7
+r1bqk2r/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 b kq -
+King's Indian: classical variation *
+r1bqk2r/pp2bppp/2n2n2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: 6.Be2 *
+r1bqk2r/pp2bppp/2n2n2/2ppp3/8/N2P1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: Kazakh variation *
+r1bqk2r/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: classical without 9.O-O *
+r1bqk2r/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: classical without 9.O-O *
+r1bqk2r/pp2bppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7
+r1bqk2r/pp2bppp/2nppn2/8/2BNP3/2N1B3/PPP1QPPP/R3K2R b KQkq -
+Sicilian: Velimirovi\'c attack
+r1bqk2r/pp2bppp/2nppn2/8/3NPP2/2N1BQ2/PPP3PP/R3KB1R b KQkq -
+Sicilian: Scheveningen, Tal variation
+r1bqk2r/pp2npbp/2n3p1/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Pomar system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+King's Indian: fianchetto, Yugoslav system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R w KQkq -
+Queen's Indian: anti-Queen's Indian system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/2NP1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: fianchetto with ...Nc6 *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/3P1NP1/PPPNPPBP/R1BQ1RK1 b kq -
+King's Indian: fianchetto with ...Nd7 *
+r1bqk2r/pp2ppbp/2n2np1/3p2B1/2PP4/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD: Tarrasch, Wagner variation *
+r1bqk2r/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQK2R b KQkq -
+QGD: Tarrasch, Prague variation, 7...Be7 *
+r1bqk2r/pp2ppbp/2n2np1/8/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: fianchetto variation *
+r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2Q1RK1 b kq -
+Sicilian: dragon, classical, 8.O-O
+r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R3K2R b KQkq -
+Sicilian: dragon, classical, Amsterdam variation
+r1bqk2r/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: dragon, classical, Nottingham variation
+r1bqk2r/pp2ppbp/2np2pn/8/2P1P3/8/PPN1BPPP/RNBQK2R w KQkq -
+Sicilian: accelerated fianchetto, Simagin variation
+r1bqk2r/pp3ppp/2n1pn2/2bp4/1P6/2P1PN2/P2N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran variation *
+r1bqk2r/pp3ppp/2n1pn2/2bp4/8/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 7.Bc4 *
+r1bqk2r/pp3ppp/2n2n2/1Bb1p3/8/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Scotch: G\"oring gambit, Bardeleben variation *
+r1bqk2r/pp3ppp/2n2n2/1Bbpp3/8/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: Greco's attack *
+r1bqk2r/pp3ppp/2nb1n2/1P1pp3/8/P1P1PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Pir\'c variation *
+r1bqk2r/pp3ppp/2nb1n2/3p4/1PP1p3/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, old main line *
+r1bqk2r/pp3ppp/2nb1n2/3pp3/1PP5/P3PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran *
+r1bqk2r/pp3ppp/2nb1n2/4p3/1PPp4/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Reynolds' variation *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/2PP4/4PN2/PP3PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3, main line with ...c5 *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/3P4/1P2PN2/P1P2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3, main line with ...b6 *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/3P4/2P1PN2/PP1N1PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Romih variation *
+r1bqk2r/pp3ppp/2nbpn2/1P1p4/8/2P1PN2/P2N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: neo-Meran (Lundin variation) *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 6.Bd3 *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQK2R b KQkq -
+QGD semi-Slav: Bogolyubov variation *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2PBPN2/PP1N1PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Chigorin defense *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with e3 & Bd3 *
+r1bqk2r/pp3ppp/2nbpn2/2ppN3/3P1P2/2P1P3/PP4PP/RNBQKB1R b KQkq -
+QGD semi-Slav: stonewall defense *
+r1bqk2r/pp3ppp/2nbpn2/3p4/1P6/2P1PN2/PB1N1PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Meran, Wade variation *
+r1bqk2r/pp3ppp/2nbpn2/3p4/1P6/P1P1PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, 8...a6 *
+r1bqk2r/pp3ppp/2nbpn2/3p4/2PN4/2N1P3/PP3PPP/R1BQKB1R w KQkq -
+QGD: Semi-Tarrasch, 7.Bd3 *
+r1bqk2r/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQK2R w KQkq -
+Nimzo-Indian: e3, H\"ubner variation
+r1bqk2r/pp3ppp/3b1n2/3P2N1/1n2p3/P3P3/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Rabinovich variation *
+r1bqk2r/pp3ppp/3b1n2/3P4/1n2N3/P3PN2/5PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Sozin variation *
+r1bqk2r/pp3ppp/3b1n2/3P4/1n2p3/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Blumenfeld variation *
+r1bqk2r/ppb2ppp/2n5/1Bpnp3/8/P1N1PN2/1P1P1PPP/R1BQK2R w KQkq -
+Sicilian: Kan, Mar\'oczy bind - Bronstein variation *
+r1bqk2r/ppp1bpp1/5n1p/3P4/2P1p3/5N2/PPP1QPPP/RNB1K2R w KQkq -
+two knights defense: Mar\'oczy variation
+r1bqk2r/ppp1bppp/1nn5/4p3/4P3/2NP1N2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Boleslavsky variation, 7.Nb3 *
+r1bqk2r/ppp1bppp/2n2n2/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: classical system, 5.Be2 *
+r1bqk2r/ppp1bppp/2n5/1B1pp3/3Pn3/5N2/PPP1QPPP/RNB2RK1 w kq -
+Ruy Lopez: Berlin defense, Trifunovi\'c variation
+r1bqk2r/ppp1bppp/2n5/3np3/4P3/2NP1N2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Boleslavsky variation *
+r1bqk2r/ppp1bppp/2n5/3np3/8/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: classical *
+r1bqk2r/ppp1bppp/2n5/3np3/8/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: modern Scheveningen *
+r1bqk2r/ppp1bppp/2n5/3np3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, 6.Be2 *
+r1bqk2r/ppp1bppp/2n5/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Opo\v censky variation *
+r1bqk2r/ppp1bppp/2n5/3np3/8/P2PPN2/1P3PPP/RNBQKB1R b KQkq -
+Sicilian: Scheveningen (Paulsen), classical variation *
+r1bqk2r/ppp1bppp/2n5/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 b kq -
+Petrov: classical attack, Jaenisch variation
+r1bqk2r/ppp1bppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQR1K1 b kq -
+Petrov: classical attack, Chigorin variation
+r1bqk2r/ppp1bppp/2n5/4p3/4P3/2nP1N2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Boleslavsky, Louma variation *
+r1bqk2r/ppp1npbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.Ne2 e5 (Botvinnik) *
+r1bqk2r/ppp1nppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 w kq -
+Evans gambit: Paulsen variation
+r1bqk2r/ppp1nppp/3p1b2/3P4/2B1R1P1/5N2/PP3P1P/R1BQ2K1 b kq -
+Giuoco Piano: M\"oller, bayonet attack
+r1bqk2r/ppp2pbp/2np2pn/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -
+English: closed, Taimanov variation
+r1bqk2r/ppp2pp1/5n1p/2bP4/2P1p3/8/PPPNQPPP/RNB1K2R b KQkq -
+two knights defense: Yankovich variation
+r1bqk2r/ppp2ppp/1bn5/3np3/1P6/P2PPN2/5PPP/RNBQKB1R b KQkq -
+Sicilian: Sozin with ...a6 and ...b5 *
+r1bqk2r/ppp2ppp/2n1pn2/3p4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Botvinnik variation
+r1bqk2r/ppp2ppp/2n2n2/2bpP3/2Bp4/2P2N2/PP3PPP/RNBQK2R w KQkq d6
+Giuoco Piano
+r1bqk2r/ppp2ppp/2n2n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Schlechter variation *
+r1bqk2r/ppp2ppp/2n2n2/3pp3/4P3/2bP1N2/PPPB1PPP/R2QKB1R w KQkq -
+Ruy Lopez: old Steinitz defense, Nimzovich attack *
+r1bqk2r/ppp2ppp/2n5/1B1pP3/1b1Pn3/5N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: Anderssen variation
+r1bqk2r/ppp2ppp/2n5/2b5/4p3/2PP1NP1/P3PP1P/R1BQKB1R w KQkq -
+Sicilian: Magnus Smith trap *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/1QNP1N2/PP2PPPP/R1B1KB1R b KQkq -
+Sicilian: Sozin, Benk\"o variation *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: Sozin, not Scheveningen *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Sozin, Leonhardt variation *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Sozin attack *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Lipnitzky attack *
+r1bqk2r/ppp2ppp/2n5/3np1N1/1bBP4/8/PPP2PPP/RNBQK2R w KQkq -
+two knights defense: Pincus variation
+r1bqk2r/ppp2ppp/2n5/3np3/1b2P3/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Venice attack *
+r1bqk2r/ppp2ppp/2n5/3np3/1b6/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, Vitoli\'n\'s variation *
+r1bqk2r/ppp2ppp/2n5/3p4/2BP4/1Qb2N2/P4PPP/R1B2RK1 w kq -
+Giuoco Piano: Bernstein variation
+r1bqk2r/ppp2ppp/2n5/3p4/2BPn3/B1P2N2/P4PPP/R2Q1RK1 b kq -
+Giuoco Piano: Steinitz variation
+r1bqk2r/ppp2ppp/2n5/3pp3/2PPn3/P3P3/1PQ2PPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, San Remo variation
+r1bqk2r/ppp2ppp/2n5/3pp3/4P1n1/3P1N2/PPPNBbPP/R1BQ1RK1 w kq -
+Philidor: Nimzovich, L\"arobok variation *
+r1bqk2r/ppp2ppp/2nb4/1B1np3/4P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Pin, Jaffe variation *
+r1bqk2r/ppp2ppp/2np1n2/2b1p1B1/2B1P3/2NP1N2/PPP2PPP/R2QK2R b KQkq -
+Giuoco Pianissimo: Canal variation
+r1bqk2r/ppp2ppp/2np1n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Pianissimo: Italian four knights variation *
+r1bqk2r/ppp2ppp/2np1n2/4p3/4P3/P1P2P2/1PP3PP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange, Romanovsky variation *
+r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R w KQkq -
+Nimzo-Indian: classical, Milner-Barry (Zurich) variation
+r1bqk2r/ppp2ppp/3p1n2/4p1B1/2BnP3/8/PPP2PPP/RN1Q1RK1 w kq -
+Giuoco piano
+r1bqk2r/ppp3p1/2n5/2bppPPp/4n2P/7B/PPPP1P1R/RNBQK1N1 w Qkq -
+KGA: Kieseritsky, long whip defense, Jaenisch variation *
+r1bqk2r/ppp3pp/2nb1n2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.Bd3 *
+r1bqk2r/pppn1ppp/4pn2/3p2B1/1bPP4/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: Manhattan variation
+r1bqk2r/pppn1ppp/5n2/2bP4/8/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, Eliskases variation *
+r1bqk2r/pppnbppp/3p1n2/4p3/3P4/2N1PN2/PPP2PPP/R1BQKB1R w KQkq -
+French: Reversed Philidor formation *
+r1bqk2r/pppnbppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Inverted Hanham *
+r1bqk2r/pppp1p2/5n1p/4p1p1/2BnPP1B/8/PPP3PP/RN1Q1RK1 b kq -
+Giuoco piano: Rosentreter variation
+r1bqk2r/pppp1pbp/2n3pn/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR w Kkq -
+English: closed, 5.Rb1 Taimanov variation
+r1bqk2r/pppp1pp1/5n1p/4n3/2PN3B/2P5/P3PPPP/R2QKB1R w KQkq -
+English: Nenarokov variation
+r1bqk2r/pppp1ppp/1b5n/nP2N3/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit declined, Lange variation
+r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: 4.e3, Taimanov variation
+r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, 4...Nc6
+r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: double Ruy Lopez *
+r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: double Ruy Lopez
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Spanish, classical defense
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/3PBN2/PPP2PPP/RN1QK2R b KQkq -
+Ruy Lopez: Berlin defense, Kaufmann variation
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, Beverwijk variation
+r1bqk2r/pppp1ppp/2n2n2/2b1N3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Boden-Kieseritsky gambit: Lichtenhein defense *
+r1bqk2r/pppp1ppp/2n2n2/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Boden-Kieseritsky gambit *
+r1bqk2r/pppp1ppp/2n2n2/2b1P3/2Bp4/5N2/PPP2PPP/RNBQ1RK1 b kq -
+two knights: Max Lange attack
+r1bqk2r/pppp1ppp/2n2n2/2b1p1N1/2B1P3/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Wilkes Barre (Traxler) variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/1PB1P3/2P2N2/P2P1PPP/RNBQK2R b KQkq -
+Giuoco Piano: Bird's attack
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Piano: four knights variation *
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: four knights variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -
+Giuoco Pianissimo: Italian four knights variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -
+Giuoco Pianissimo
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1PP2/2P5/PP1PQ1PP/RNB1K1NR b KQkq -
+Bishop's opening: Lopez gambit
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Italian variation *
+r1bqk2r/pppp1ppp/2n2n2/2b5/2BPP3/5N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Rubinstein counter-gambit *
+r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Schlechter variation
+r1bqk2r/pppp1ppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Scotch, Krause variation
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Spanish variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2P3/2N3P1/PPPPNP1P/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense, Paulsen variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2PP2/2N5/PPPP2PP/R1BQKBNR w KQkq -
+Ruy Lopez: Schliemann defense, Berger variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Spanish, classical defense *
+r1bqk2r/pppp1ppp/2n2n2/4p3/2P5/2b1PN2/PPQP1PPP/R1B1KB1R w KQkq -
+English: four knights, Romanishin variation
+r1bqk2r/pppp1ppp/2n2n2/4p3/4P3/P1P5/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange, Keres variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/4P3/P1b2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Four knights: Ranken variation *
+r1bqk2r/pppp1ppp/2n2n2/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -
+Scotch: G\"oring gambit, Bardeleben variation
+r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/2N2N2/PP3PPP/R1BQK2R b KQkq -
+Giuoco Piano: Greco's attack
+r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/5N2/PP3PPP/RNBQ1K1R b kq -
+Giuoco Piano: Cracow variation
+r1bqk2r/pppp1ppp/2n2n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: four knights (Tarrasch) variation *
+r1bqk2r/pppp1ppp/2n2n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Three knights variation *
+r1bqk2r/pppp1ppp/2n4n/2b3NQ/2BpP3/8/PPP2PPP/RNB1K2R b KQkq -
+Scotch gambit: Vitzhum attack
+r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+two knights: Max Lange attack, Krause variation
+r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/5N2/PPP2PPP/RNBQ1RK1 w kq -
+two knights: Max Lange attack, Steinitz variation
+r1bqk2r/pppp1ppp/2n5/2bBP3/8/2p2NK1/PP4PP/RNBQ3R b kq -
+Giuoco Piano: Ghulam Kassim variation
+r1bqk2r/pppp1ppp/2n5/2bPp3/4n3/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+Ponziani: Fraser defense
+r1bqk2r/pppp1ppp/2n5/3P4/2B1n3/2b2N2/PP3PPP/R1BQ1RK1 b kq -
+Giuoco Piano: M\"oller (Therkatz) attack
+r1bqk2r/pppp1ppp/2n5/3np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Rubinstein counter-gambit, exchange variation *
+r1bqk2r/pppp1ppp/2n5/8/1bBP4/2n2N2/PP3PPP/R1BQ1RK1 w kq -
+Giuoco Piano: Greco variation
+r1bqk2r/pppp1ppp/2n5/8/2BP4/B1b2N2/P4PPP/R2Q1RK1 b kq -
+Giuoco Piano: Aitken variation
+r1bqk2r/pppp1ppp/2n5/8/2BPn3/2b2N2/PP3PPP/R1BQ1RK1 w kq -
+Giuoco Piano
+r1bqk2r/pppp2pp/2n2n2/1Bb1pQ2/4P3/8/PPPP1PPP/RNB1K1NR w KQkq -
+KGD: Norwalde variation, B\"ucker gambit *
+r1bqk2r/pppp2pp/2n2n2/2b1p3/2P2p2/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+Sicilian: Grand Prix attack, Schofman variation *
+r1bqk2r/pppp2pp/2n2n2/2b1pPP1/8/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: MacDonnell gambit *
+r1bqk2r/pppp2pp/2n5/3Npp2/1b2n3/5N2/PPPPQPPP/R1B1KB1R w KQkq -
+Four knights: Rubinstein counter-gambit, Bogolyubov variation *
+r1bqk2r/ppppbppp/2n2n2/3Np3/4P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Rubinstein counter-gambit, 5.Be2 *
+r1bqk2r/ppppbppp/2n5/1B2P3/4n3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, Minckwitz variation
+r1bqk2r/ppppbppp/2n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open Berlin defense, 5...Be7
+r1bqk2r/ppppbppp/2n5/4P3/2Bpn3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Hungarian defense: Tartakower variation
+r1bqk2r/ppppbppp/2nn4/4N2Q/8/1BN5/PPPP1PPP/R1B1K2R b KQkq -
+Vienna: Alekhine variation
+r1bqk3/ppp3p1/2n5/2bppP2/4n1P1/2PP4/PP3P2/RNBQK1NB w KQq -
+KGA: Greco gambit *
+r1bqkb1r/1p1n1ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen, classical, Nd7 system
+r1bqkb1r/1p1ppppp/p1n2n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Marini variation *
+r1bqkb1r/1p2nppp/p1n1p3/2pp4/3P4/3BPN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: Simagin variation *
+r1bqkb1r/1p2pp1p/2n3p1/p1np4/4PB2/2P2N2/PPQN1PPP/R3KB1R b KQkq -
+QGD Slav: Carlsbad variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp2B1/8/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: Steiner variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/5B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: Czech defense *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/8/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD Slav: Soultanb\'eieff variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav accepted: Alapin variation *
+r1bqkb1r/1p2pppp/2n5/p1Pp4/4nB2/2P1PN2/PP3PPP/RN1QKB1R b KQkq -
+QGD Slav: Wiesbaden variation *
+r1bqkb1r/1p2pppp/2n5/p1Pp4/4nB2/2P2N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: Krause attack *
+r1bqkb1r/1p3ppp/2n1pn2/p1Pp4/5B2/2P2N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: Dutch variation *
+r1bqkb1r/1p3ppp/2n1pn2/p1Pp4/5B2/N1P2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: Dutch, Lasker variation *
+r1bqkb1r/1p3ppp/2n2n2/p1Ppp1B1/8/N1P2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: Smyslov variation *
+r1bqkb1r/1p3ppp/p1n1pn2/3p4/2P1P3/N1N5/PP3PPP/R1BQKB1R w KQkq -
+Sicilian, Sz\'en variation, Dely-Kasparov gambit
+r1bqkb1r/1p3ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6
+r1bqkb1r/1pp1nppp/p1B5/3pP3/8/4P3/PPP2PPP/RNBQK1NR b KQkq -
+French: Winawer, Alekhine gambit *
+r1bqkb1r/1pp2ppp/2P2n2/1p6/3Pp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Rauzer variation *
+r1bqkb1r/1pp2ppp/p1n5/3pP3/8/2N1P3/PPP2PPP/R1BQK1NR b KQkq -
+French: Winawer, Alekhine gambit, Kan variation *
+r1bqkb1r/1pp2ppp/p1np1n2/4p3/B1P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: Morphy defense, Duras variation
+r1bqkb1r/1pp2ppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred (Russian defense)
+r1bqkb1r/1ppn1ppp/p3pn2/8/3P4/6P1/PPQ1PPBP/RNB1K1NR b KQkq -
+Catalan: open, Alekhine variation
+r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Ranken variation
+r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez: Treybal (Bayreuth) variation (exchange var. deferred)
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Gunsberg variation *
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: four knights (Tarrasch) variation
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: Anderssen variation
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: 5.O-O
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Morphy defense
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB1K2R b KQkq -
+Ruy Lopez: Wormald (Alapin) attack
+r1bqkb1r/1ppp1ppp/p1n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, Rosenthal variation
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 6.d4
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Knorre variation
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open (Tarrasch) defense
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPPQPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Tartakower variation
+r1bqkb1r/1ppp1ppp/p1n5/8/B2pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Riga variation
+r1bqkb1r/1pppnppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cozio defense deferred
+r1bqkb1r/2p1nppp/p7/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Zukertort variation
+r1bqkb1r/2p2ppp/p1n5/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 8.de
+r1bqkb1r/2p2ppp/p1n5/1p1pp3/2PPn3/1B3N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Harksen gambit
+r1bqkb1r/2p2ppp/p1np1n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: ...b5 & ...d6
+r1bqkb1r/2p2ppp/p1p2n2/3p4/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, positional main line *
+r1bqkb1r/2p2ppp/p1pp4/4p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred, Rubinstein variation
+r1bqkb1r/2p2ppp/p7/1p1p4/P2pn3/1BN5/1PP2PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Berger variation
+r1bqkb1r/2p2ppp/p7/1p1pp3/P2nn3/1B3N2/1PP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Schlechter defense
+r1bqkb1r/2p3pp/p1p5/3pPp2/4n3/2N2N2/PPP2PPP/R1BQR1K1 b kq -
+Ruy Lopez: Steinitz defense deferred, Boleslavsky variation
+r1bqkb1r/2pp1ppp/p1n5/1p1Pp3/B3n3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Richter variation
+r1bqkb1r/2pp1ppp/p1n5/1p2N3/B2Pn3/8/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Friess attack
+r1bqkb1r/2pp1ppp/p1n5/1p2p3/3Pn3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 7.Bb3
+r1bqkb1r/2pp1ppp/p1n5/1p2p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, 6.d4 b5
+r1bqkb1r/3n1ppp/p1p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, 8...a6
+r1bqkb1r/3n1ppp/p1p1pn2/8/1p1PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Pir\'c variation
+r1bqkb1r/3n1ppp/p3p3/1N2P3/3p2n1/3B1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Rabinovich variation
+r1bqkb1r/3n1ppp/p3pn2/1N2P3/3p4/3B1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, Blumenfeld variation
+r1bqkb1r/3n1ppp/p3pn2/1pp1P3/3P4/2NB1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, old main line
+r1bqkb1r/3n1ppp/p3pn2/1pp5/3PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran
+r1bqkb1r/3n1ppp/p3pn2/1ppP4/4P3/2NB1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, Reynolds' variation
+r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Sveshnikov variation
+r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B1Q2/PP3PPP/R1B1K2R b KQkq -
+QGD semi-Slav: Meran, Stahlberg variation
+r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B4/PP3PPP/R1BQ1RK1 b kq -
+QGD semi-Slav: Meran, Sozin variation
+r1bqkb1r/5ppp/p1np1n2/1p2p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Pelikan, Chelyabinsk variation
+r1bqkb1r/5ppp/p3pn2/1N2n3/3p4/3B1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Sozin variation
+r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Ulvestad variation
+r1bqkb1r/p1p2ppp/8/1p1np3/3nN3/2P5/PP1P1PPP/RNBQKB1R b KQkq -
+two knights defense: Fritz, Gruber variation
+r1bqkb1r/p1pn1ppp/1p2pn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Queen's pawn game, Zukertort variation *
+r1bqkb1r/p1pp1ppp/2p2n2/4P3/8/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Mieses variation
+r1bqkb1r/p1pp1ppp/2p2n2/8/4P3/8/PPPN1PPP/R1BQKB1R b KQkq -
+Scotch: Tartakower variation
+r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N2Q2/PP3PPP/R3KB1R b KQkq -
+QGD semi-Slav: anti-Meran, Szab\'o variation
+r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N3P1/PP3P1P/R2QKB1R b KQkq -
+QGD semi-Slav: anti-Meran, Lilienthal variation
+r1bqkb1r/p2n1ppp/2p1pn2/1p6/2BP4/2N1PN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran variation
+r1bqkb1r/p2n1ppp/2p1pn2/8/1p1P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: neo-Meran (Lundin variation)
+r1bqkb1r/p3pp1p/2pp1np1/4P3/2B5/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Magnus Smith trap
+r1bqkb1r/p4pp1/2p2n1p/n3p1N1/8/8/PPPPBPPP/RNBQK2R w KQkq -
+Two knights defense
+r1bqkb1r/p4pp1/2p2n1p/n3p3/8/7N/PPPPBPPP/RNBQK2R b KQkq -
+two knights defense: Steinitz variation
+r1bqkb1r/p4ppp/2n1pn2/1ppp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Makogonov variation *
+r1bqkb1r/p4ppp/2p2n2/3pp3/8/6P1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: modern exchange variation *
+r1bqkb1r/p4ppp/2p2n2/n3p1N1/8/8/PPPPBPPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R b KQkq -
+two knights defense: Bogolyubov variation
+r1bqkb1r/p4ppp/5n2/np2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQkq -
+two knights defense: Blackburne variation
+r1bqkb1r/pp1n1ppp/2n1p3/2PpP3/5P2/2N5/PPP3PP/R1BQKBNR w KQkq -
+French: Steinitz variation
+r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P1P2/2N1BN2/PPP3PP/R2QKB1R b KQkq -
+French: Steinitz, Boleslavsky variation
+r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -
+French: Tarrasch, closed variation
+r1bqkb1r/pp1n1ppp/2n1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R b KQkq -
+French: Tarrasch, closed variation, main line
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: 5...c6
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/4PN2/PP1N1PPP/R2QKB1R b KQkq -
+QGD: Capablanca variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/P1N1P3/1P3PPP/R2QKBNR b KQkq -
+QGD: Capablanca anti-Cambridge Springs variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD: Alekhine variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 5...Nd7
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq -
+QGD semi-Slav: Stoltz variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: 6.Bd3
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD Slav
+r1bqkb1r/pp1n1ppp/2p1pn2/3pN3/2PP4/2N1P3/PP3PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Rubinstein (anti-Meran) system
+r1bqkb1r/pp1n1ppp/2p1pn2/8/2BP4/2N1PN2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: 7.Bc4
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/2PP4/3BPN2/PP1N1PPP/R1BQK2R w KQkq -
+QGD Slav: Semmering variation
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav *
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD Slav *
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PNP1/PP3P1P/RNBQKB1R b KQkq -
+QGD: Spielmann variation *
+r1bqkb1r/pp1npp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R w KQkq -
+Sicilian: dragon, Levenfish; Flohr variation
+r1bqkb1r/pp1npppp/2n5/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: Nimzovich (knight's tour) variation *
+r1bqkb1r/pp1npppp/2n5/8/2Pp4/B2P1NP1/4PP1P/RN1QKB1R w KQkq -
+Benk\"o gambit: Nd2 variation *
+r1bqkb1r/pp1npppp/5n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Bogo-Indian defense, Gr\"unfeld variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+QGD: Albin counter-gambit, Janowski variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N5/PPP1QPPP/R1B1KBNR b KQkq -
+QGD: Albin counter-gambit, Balogh variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+QGD: Albin counter-gambit, Alapin variation *
+r1bqkb1r/pp1npppp/5n2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: Breyer variation *
+r1bqkb1r/pp1p1Npp/2p1nn2/8/2B1P3/8/PPP2PPP/RNBQ1RK1 b kq -
+Scotch: Cochrane variation
+r1bqkb1r/pp1p1ppp/2n1pn2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, 4.e3 *
+r1bqkb1r/pp1p1ppp/2n1pn2/8/2PN4/2N5/PP2PPPP/R1BQKB1R w KQkq -
+English: symmetrical variation
+r1bqkb1r/pp1p1ppp/2n2n2/2p1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Nimzovich variation *
+r1bqkb1r/pp1p1ppp/2n2n2/4p3/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Pelikan (Lasker/Sveshnikov) variation
+r1bqkb1r/pp1p1ppp/2n5/2ppP3/3P4/5N2/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Nimzovich-Rubinstein; Rubinstein counter-gambit
+r1bqkb1r/pp1p1ppp/n1p2n2/8/2PNp3/2N5/PP1PPPPP/R1BQKB1R w KQkq -
+Sicilian: 2.c3, Heidenfeld variation *
+r1bqkb1r/pp1pnppp/2p2n2/1B2N3/4P3/3P4/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense, Mortimer trap
+r1bqkb1r/pp1ppp1p/2n2np1/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, kingside fianchetto *
+r1bqkb1r/pp1ppppp/2n2n2/1Bp5/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+English: Nimzo-English opening *
+r1bqkb1r/pp1ppppp/2n2n2/2p3B1/4P3/3P4/PPP2PPP/RN1QKBNR b KQkq -
+English, Smyslov defense *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: symmetrical, four knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: symmetrical, four knights system
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+English: four knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+English: three knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -
+English opening *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/8/1P2PN2/P1PP1PPP/RNBQKB1R b KQkq -
+English: Queens Indian formation *
+r1bqkb1r/pp1ppppp/2n2n2/8/2PN4/8/PP2PPPP/RNBQKB1R b KQkq -
+English: symmetrical, three knights system *
+r1bqkb1r/pp1ppppp/2n2n2/8/3N4/8/PPP1PPPP/RNBQKB1R w KQkq -
+English: Anglo-Gr\"unfeld defense *
+r1bqkb1r/pp1ppppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkb1r/pp1ppppp/2n5/2p1P3/1P4n1/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+English: Bellon gambit *
+r1bqkb1r/pp1ppppp/2n5/2pnP3/8/N1P2N2/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: 2.c3, Heidenfeld variation
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein, anti-H\"ubner system) *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/1P2PN2/P1PP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Fischer variation, 5.Ne2 *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: Reshevsky variation *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/BP2PN2/P1PP1PPP/RN1QK2R b KQkq -
+Nimzo-Indian: 4.e3, Bronstein (Byrne) variation *
+r1bqkb1r/pp2nppp/2n5/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Kramer system *
+r1bqkb1r/pp2pp1p/2n2np1/2Pp4/3P4/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: Tarrasch, Folkestone (Swedish) variation *
+r1bqkb1r/pp2pp1p/2n2np1/2pp4/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n2np1/3p4/2PP4/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD: Tarrasch, Prague variation *
+r1bqkb1r/pp2pp1p/2n2np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system *
+r1bqkb1r/pp2pp1p/2n2np1/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n2np1/8/2Pp4/B2P1NP1/4PP1P/RN1QKB1R w KQkq -
+Benk\"o gambit: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n3p1/2pn4/8/1QN1PN2/PP1P1PPP/R1B1KB1R b KQkq -
+English: symmetrical, Geller variation *
+r1bqkb1r/pp2pp1p/2np1np1/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Bondarevsky variation
+r1bqkb1r/pp2pp1p/3p1np1/8/2PQP3/2N5/PP3PPP/R1B1KB1R w KQkq -
+Sicilian: accelerated fianchetto, Gurgenidze variation
+r1bqkb1r/pp2pppp/2n2n2/1Bp1N3/2Pp4/4P3/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: three knights, Euwe variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bp5/2Pp4/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: three knights, Korchnoi variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Ragozin variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+QGD: Chigorin defense, Janowski variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: semi-Slav, Noteboom variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2P2N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav accepted *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA, 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD: Semi-Tarrasch defense *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/1QP2N2/PP2PPPP/RNB1KB1R b KQkq -
+QGD Slav: S\"uchting variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P2NP1/PP2PP1P/RNBQKB1R b KQkq -
+QGD Slav\Gr\"unfeld: Schlechter variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: 4.Nf3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq -
+Gr\"unfeld: Three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/4P3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Old Indian: Ukrainian variation, 4.Nf3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2ppP3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+English: Bradley Beach variation *
+r1bqkb1r/pp2pppp/2n2n2/3p4/2PP4/8/PP3PPP/RNBQKBNR w KQkq -
+QGD: Tarrasch defense *
+r1bqkb1r/pp2pppp/2n2n2/3p4/2Pp4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, 5.cd *
+r1bqkb1r/pp2pppp/2n2n2/3p4/3P1B2/2PB4/PP3PPP/RN1QK1NR b KQkq -
+Caro-Kann: exchange, Rubinstein variation
+r1bqkb1r/pp2pppp/2n2n2/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R b KQkq -
+Benoni defense *
+r1bqkb1r/pp2pppp/2n5/2pn4/8/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq -
+English: symmetrical variation *
+r1bqkb1r/pp2pppp/2np1n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Capablanca variation *
+r1bqkb1r/pp2pppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer
+r1bqkb1r/pp2pppp/2np1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Sozin, not Scheveningen
+r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: classical
+r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian
+r1bqkb1r/pp2pppp/5n2/n2P2B1/2p5/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Herzog defense
+r1bqkb1r/pp3p1p/2n2np1/2Ppp3/3P4/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation *
+r1bqkb1r/pp3ppp/1nn1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R w KQkq -
+French: Tarrasch, Leningrad variation
+r1bqkb1r/pp3ppp/2Np1n2/4p3/4P3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Boleslavsky, Louma variation
+r1bqkb1r/pp3ppp/2Nppn2/6B1/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Richter attack
+r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQK2R b KQkq -
+QGD: Semi-Tarrasch, 7.Bd3
+r1bqkb1r/pp3ppp/2n1p3/2pp4/3Pn3/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Rubinstein (anti-Meran) system *
+r1bqkb1r/pp3ppp/2n1p3/3p4/3PnB2/4P3/PP1N1PPP/RN1QKB1R b KQkq -
+QGD Slav: Amsterdam variation *
+r1bqkb1r/pp3ppp/2n1pn2/1Bpp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5 *
+r1bqkb1r/pp3ppp/2n1pn2/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5 *
+r1bqkb1r/pp3ppp/2n1pn2/2Pp4/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 5.e3 (Alekhine variation) *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: 5...Nd7 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD semi-Slav: 5.e3 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.e3 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/P1P1PN2/1P3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav: accelerated Meran (Alekhine variation) *
+r1bqkb1r/pp3ppp/2n1pn2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, normal variation
+r1bqkb1r/pp3ppp/2n1pn2/3p4/2PN4/4P3/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch with e3 *
+r1bqkb1r/pp3ppp/2n1pn2/3p4/3P1B2/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: exchange variation *
+r1bqkb1r/pp3ppp/2n2n2/1B2p3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch: G\"oring gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Pp4/1P2p3/2P2N2/P3PPPP/RNBQKB1R w KQkq -
+QGD Slav: Tolush-Geller gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Ppp3/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: Slav gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Ppp3/8/P4N2/1PP1PPPP/RNBQKB1R w KQkq -
+QGA, Bogolyubov variation *
+r1bqkb1r/pp3ppp/2n2n2/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -
+QGD: Tarrasch, Prague variation
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/4P3/3P1N2/PPPN1PPP/R1BQKB1R w KQkq -
+Old Indian: main line *
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: 5.Nf3 *
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/Q1P5/3P2P1/PP2PPBP/RNB1K1NR b KQkq -
+Pterodactyl defense *
+r1bqkb1r/pp3ppp/2n2n2/4p3/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: classical with e4 and Nf3 *
+r1bqkb1r/pp3ppp/2np1n2/4p3/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: Boleslavsky variation
+r1bqkb1r/pp3ppp/2np1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Boleslavsky variation, 7.Nb3
+r1bqkb1r/pp3ppp/2nppn2/1B4B1/3NP3/2N5/PPP2PPP/R2QK2R b KQkq -
+Sicilian: Richter-Rauzer, Margate (Alekhine) variation
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, 6...e6
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2NQ4/PPP2PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Keres variation
+r1bqkb1r/pp3ppp/2nppn2/6B1/4P3/1NN5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Pod\v ebrady variation
+r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -
+Sicilian: Sozin, 7.Be3
+r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin, Leonhardt variation
+r1bqkb1r/pp3ppp/2nppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: modern Scheveningen
+r1bqkb1r/pp3ppp/n1n5/2p1p3/3P4/P1N1PN2/1P3PPP/R1BQKB1R b KQkq -
+Sicilian, Sz\'en variation, Dely-Kasparov gambit *
+r1bqkb1r/pp4pp/2n2n2/2p1pp2/2Pp4/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, dynamic line *
+r1bqkb1r/pp4pp/2n2n2/4pp2/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: four pawns attack *
+r1bqkb1r/ppp1nppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, Alekhine (Mar\'oczy) gambit *
+r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/4B3/PP4PP/RN1QKBNR b KQkq -
+Alekhine's defense: four pawns attack, 7.Be3
+r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, 6...Nc6
+r1bqkb1r/ppp2Npp/2n5/3np3/2B5/8/PPPP1PPP/RNBQK2R b KQkq -
+two knights defense: Fegatello attack
+r1bqkb1r/ppp2p1p/2n3p1/3np3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, fianchetto variation *
+r1bqkb1r/ppp2p1p/2n3p1/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Zagreb (fianchetto) variation *
+r1bqkb1r/ppp2p1p/2n5/3np1p1/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, Keres attack *
+r1bqkb1r/ppp2p1p/2n5/3p2p1/Q3nB2/2P2N2/PP2PPPP/RN2KB1R w KQkq -
+Scandinavian defense, Gr\"unfeld variation *
+r1bqkb1r/ppp2pp1/2n2n1p/3p2B1/Q7/5N2/PPP1PPPP/RN2KB1R w KQkq -
+Scandinavian defense, Lasker variation *
+r1bqkb1r/ppp2pp1/2n2n1p/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: classical, h3 system *
+r1bqkb1r/ppp2pp1/2n4p/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Adams attack *
+r1bqkb1r/ppp2pp1/5nn1/3p3p/8/2P3BP/PP1NPPP1/R2QKBNR b KQkq -
+Caro-Kann: classical, 7...Nd7 *
+r1bqkb1r/ppp2pp1/5nn1/3p4/7p/2P3BP/PP1NPPP1/R2QKBNR w KQkq -
+Caro-Kann: classical, Spassky variation *
+r1bqkb1r/ppp2ppp/2Bp1n2/4p3/4P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: Berlin defense, Anderssen variation
+r1bqkb1r/ppp2ppp/2n1pn2/3p4/3PP3/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, Guimard main line
+r1bqkb1r/ppp2ppp/2n1pn2/3p4/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -
+French: Reversed Philidor formation
+r1bqkb1r/ppp2ppp/2n2n2/3Pp3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Scotch, 4...exd4 *
+r1bqkb1r/ppp2ppp/2n2n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: exchange, Bogolyubov variation
+r1bqkb1r/ppp2ppp/2n2n2/3p2B1/Q3P3/8/PPP2PPP/RN2KBNR b KQkq -
+Scandinavian: Anderssen counter-attack, Collijn variation *
+r1bqkb1r/ppp2ppp/2n2n2/3p4/Q3P3/8/PPP2PPP/RNB1KBNR w KQkq -
+Scandinavian: Anderssen counter-attack, Goteborg system *
+r1bqkb1r/ppp2ppp/2n2n2/3p4/Q4B2/5N2/PPP1PPPP/RN2KB1R b KQkq -
+Scandinavian defense *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Scotch variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPN1PPP/R1BQKB1R b KQkq -
+Philidor: Improved Hanham variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -
+Inverted Hanham
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4PP2/3P4/PPP3PP/RNBQKBNR w KQkq -
+Philidor: Philidor counter-gambit, Zukertort variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/2PP2P1/PP2PPBP/RNBQK1NR b KQkq -
+Robatsch defense: two knights, Suttles variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: classical (two knights) system *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R b KQkq -
+Pirc: classical (two knights) system *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: two knights variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Leonhardt variation
+r1bqkb1r/ppp2ppp/2n5/1B1n4/4p3/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Sicilian: Pin, Koch variation *
+r1bqkb1r/ppp2ppp/2n5/1B1np3/8/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Pin variation (Sicilian counter-attack) *
+r1bqkb1r/ppp2ppp/2n5/1B1pp3/4n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Scotch, Krause variation *
+r1bqkb1r/ppp2ppp/2n5/1B2p3/8/2NnPN2/PP1P1PPP/R1BQK2R w KQkq -
+Sicilian: Taimanov, American attack *
+r1bqkb1r/ppp2ppp/2n5/3np1N1/2BP4/8/PPP2PPP/RNBQK2R b KQkq -
+two knights defense: Lolli attack
+r1bqkb1r/ppp2ppp/2n5/3np2Q/8/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Steinitz variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/4P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: Pelikan (Lasker/Sveshnikov) variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N1P3/PP1P1PPP/R1BQKBNR w KQkq -
+Sicilian: Taimanov variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N1P3/PPQP1PPP/R1B1KBNR b KQkq -
+Sicilian: Taimanov (Bastrikov) variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, modern variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2NP1N2/PP2PPPP/R1BQKB1R b KQkq -
+Sicilian *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1N2/PP2PPPP/RNBQKB1R w KQkq -
+Sicilian *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1NP1/PP2PP1P/RNBQKB1R b KQkq -
+Sicilian: dragon variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3PPN2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Scheveningen variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P1N1P3/1P1P1PPP/R1BQKBNR b KQkq -
+Sicilian: Taimanov variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, 5.Nc3 *
+r1bqkb1r/ppp2ppp/2n5/3p4/2Bpn3/2N2N2/PPP2PPP/R1BQR1K1 b kq -
+two knights defense: Canal variation
+r1bqkb1r/ppp2ppp/2n5/4P3/2BP2n1/4p3/PPP3PP/RNBQK1NR w KQkq -
+Philidor: Philidor counter-gambit, Berger variation *
+r1bqkb1r/ppp2ppp/2np1n2/1B2p3/2P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: Berlin defense, Duras variation
+r1bqkb1r/ppp2ppp/2np1n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, 4.O-O, d6
+r1bqkb1r/ppp2ppp/2np1n2/4p3/2P5/1PN1P3/P2P1PPP/R1BQKBNR w KQkq -
+Amsterdam attack
+r1bqkb1r/ppp2ppp/4pn2/4N3/3P4/8/PPP2PPP/R1BQKB1R b KQkq -
+French: Rubinstein, Capablanca line
+r1bqkb1r/ppp2ppp/5n2/3Pp1N1/2Bn4/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Fritz variation
+r1bqkb1r/ppp2ppp/5n2/3Pp3/3n4/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Belgrade gambit *
+r1bqkb1r/ppp2ppp/5n2/3Pp3/3n4/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -
+Three knights: Steinitz, Rosenthal variation *
+r1bqkb1r/ppp2ppp/5n2/3p4/2PPp3/2N5/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: Nimzovich-Rubinstein; Rubinstein counter-gambit *
+r1bqkb1r/ppp2ppp/5n2/3pn3/8/2B1P3/PPP2PPP/RN1QKBNR b KQkq -
+French: Fort Knox variation *
+r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/3P4/PPP2PPP/RNBQK2R b KQkq -
+two knights defense: Kieseritsky variation
+r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense
+r1bqkb1r/ppp2ppp/5n2/nB1Pp1N1/8/8/PPPP1PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/ppp2ppp/6nn/3p4/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, Flohr variation *
+r1bqkb1r/ppp2ppp/8/3p4/4n3/4PN2/PPP2PPP/R1BQKB1R w KQkq -
+French: Rubinstein, Capablanca line *
+r1bqkb1r/ppp3pp/2n2n2/3p1p2/2PPp3/4P3/PP1N1PPP/RNBQKB1R w KQkq -
+French: Steinitz variation *
+r1bqkb1r/ppp3pp/2n2n2/3p1p2/4p3/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.e5 *
+r1bqkb1r/ppp3pp/2n2n2/3p4/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Blackmar-Diemer: Euwe defense *
+r1bqkb1r/ppp3pp/2n2n2/3ppP2/6P1/2N5/PPPP1P1P/R1BQKBNR w KQkq -
+Vienna: Pierce gambit *
+r1bqkb1r/ppp3pp/2n2n2/3ppp2/2P5/3P1NP1/PP2PPBP/RNBQK2R b KQkq -
+Pirc: Austrian attack, dragon formation *
+r1bqkb1r/ppp3pp/2n2n2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq -
+Pirc: Austrian attack *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3P1NP1/PP1NPP1P/R1BQKB1R b KQkq -
+Sicilian: dragon, Levenfish; Flohr variation *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3P1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Sicilian: dragon, Levenfish variation *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, 6.f4 *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 6.f4 *
+r1bqkb1r/ppp4p/3p1nN1/8/3np2Q/8/PPP2PPP/RNB1KB1R w KQkq -
+Vienna gambit, Wurzburger trap *
+r1bqkb1r/pppn1ppp/2np4/1B2p3/3PP3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: closed Berlin defense, Chigorin variation
+r1bqkb1r/pppn1ppp/3p1n2/4p3/2PP4/2NBP3/PP3PPP/R1BQK1NR b KQkq -
+Old Indian: Dus-Khotimirsky variation
+r1bqkb1r/pppn1ppp/3p1n2/4p3/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+Old Indian: main line
+r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Philidor: Improved Hanham variation
+r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR b KQkq -
+QGD
+r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: 4.Bg5 Nbd7
+r1bqkb1r/pppn1ppp/4pn2/8/2QP4/6P1/PP2PPBP/RNB1K1NR b KQkq -
+Catalan: open, 5.Qa4 Nbd7, 6.Qxc4
+r1bqkb1r/pppn1ppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq -
+French: Tarrasch, open variation, main line *
+r1bqkb1r/pppn1ppp/5n2/3p4/3P1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: exchange, S\"amisch variation
+r1bqkb1r/pppn1ppp/5n2/3pp3/3P4/2N1PN2/PPP2PPP/R1BQKB1R b KQkq -
+French: Tarrasch, Guimard main line *
+r1bqkb1r/pppn1ppp/5n2/4N3/4p3/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Sokolsky variation *
+r1bqkb1r/pppn1ppp/8/4p3/8/2P2N2/P1PP1PPP/R1BQKB1R w KQkq -
+Scotch: Tartakower variation *
+r1bqkb1r/pppp1ppp/2n1pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -
+English: Mikenas-Carls, Kevitz variation
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Spanish variation
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, 4.O-O
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense
+r1bqkb1r/pppp1ppp/2n2n2/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, Nyholm attack
+r1bqkb1r/pppp1ppp/2n2n2/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Belgrade gambit
+r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/2N5/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Schultze-M\"uller gambit
+r1bqkb1r/pppp1ppp/2n2n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Nimzovich attack *
+r1bqkb1r/pppp1ppp/2n2n2/4p1B1/3P4/2P5/PP2PPPP/RN1QKBNR b KQkq -
+Caro-Kann: two knights, 3...Bg4 *
+r1bqkb1r/pppp1ppp/2n2n2/4p1N1/2B1P3/8/PPPP1PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Italian variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Vienna game
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense (Modern bishop's opening)
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -
+English: four knights, Nimzovich variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq -
+English: four knights, 4.e3
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: four knights system
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2NP1/PP1PPP1P/R1BQKB1R b KQkq -
+English: four knights, kingside fianchetto
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2NP1N2/PP2PPPP/R1BQKB1R b KQkq -
+English: four knights, Capablanca variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/P1N2N2/1P1PPPPP/R1BQKB1R b KQkq -
+English: four knights, Marini variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: two knights variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Two knights variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Scotch variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1BPPP/RNBQK2R b KQkq -
+Tayler opening
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights game
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Three knights: Steinitz variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Three knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: Jaenisch counter-attack
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov three knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq -
+Four knights: Gunsberg variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Three knights: Winawer defense (Gothic defense) *
+r1bqkb1r/pppp1ppp/2n2n2/6N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense, Perreux variation
+r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit: Dubois-R\'eti defense
+r1bqkb1r/pppp1ppp/2n2n2/8/2PPp3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+English: Bradley Beach variation
+r1bqkb1r/pppp1ppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Schmidt variation
+r1bqkb1r/pppp1ppp/2n2n2/8/3pP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Four knights: Scotch, 4...exd4
+r1bqkb1r/pppp1ppp/2n2n2/8/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -
+Center game: Berger variation
+r1bqkb1r/pppp1ppp/2n5/1B2p3/4n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, open variation
+r1bqkb1r/pppp1ppp/2n5/2n1P3/3N4/8/PPP1QPPP/RNB1KB1R w KQkq -
+Petrov: modern attack, Bardeleben variation
+r1bqkb1r/pppp1ppp/2n5/4p3/4n3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Schultze-M\"uller gambit *
+r1bqkb1r/pppp1ppp/2n5/8/2Bpn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2nn4/1B2P3/8/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open Berlin defense, l'Hermet variation
+r1bqkb1r/pppp1ppp/2nn4/4p2Q/3P4/1BN5/PPP2PPP/R1B1K1NR b KQkq -
+Vienna: Adams' gambit
+r1bqkb1r/pppp1ppp/2nn4/4p3/B2P4/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open Berlin defense, Showalter variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3NP3/2N5/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, exchange variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -
+Four knights: Rubinstein counter-gambit, Henneberger variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Three knights: Schlechter variation *
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Rubinstein counter-gambit
+r1bqkb1r/pppp1ppp/5n2/4p3/3nP3/2N2N2/PPPPBPPP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, 5.Be2
+r1bqkb1r/pppp2p1/2n5/4pPPp/6n1/2N5/PPPP1P1P/R1BQKBNR w KQkq -
+Vienna: Hamppe-Allgaier gambit *
+r1bqkb1r/pppp2p1/2n5/4pPPp/6n1/2NP4/PPP2P1P/R1BQKBNR b KQkq -
+Vienna: Hamppe-Allgaier gambit, Alapin variation *
+r1bqkb1r/pppp2p1/2n5/4pPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Blackburne gambit *
+r1bqkb1r/pppp2pp/2n2n2/4N3/3Pp3/8/PPP1BPPP/RNBQK2R b KQkq -
+Vienna gambit: Breyer variation *
+r1bqkb1r/pppp2pp/2n2n2/4pP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Quaade gambit *
+r1bqkb1r/pppp2pp/2n2n2/4pP2/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna gambit *
+r1bqkb1r/pppp2pp/2n2n2/4pp2/2B1P3/3P4/PPPN1PPP/R1BQK1NR b KQkq -
+KGD: classical, Hanham variation *
+r1bqkb1r/ppppnp1p/2n3p1/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Ruy Lopez: Cozio defense, Paulsen variation
+r1bqkb1r/ppppnppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cozio defense
+r1bqkb1r/ppppnppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: chameleon variation *
+r1bqkb1r/ppppnppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: R\'eti variation
+r1bqkb1r/ppppnppp/5n2/1B2p3/4P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense, Mortimer variation
+r1bqkb1r/ppppnppp/8/1B6/3pP3/8/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Bird's defense, Paulsen variation
+r1bqkb1r/pppppppp/2n2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Kevitz-Trajkovich defense
+r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Taimanov variation
+r1bqkbnr/1pp2ppp/p1n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, 5.a3 *
+r1bqkbnr/1pp2ppp/p1np4/4p3/B1P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Duras (Keres) variation
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Three knights variation
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: modern Steinitz defense, 5.O-O
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense
+r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: exchange, Keres variation
+r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: exchange variation, 5.O-O
+r1bqkbnr/1pp3pp/p1np4/4pp2/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, siesta variation
+r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -
+Ruy Lopez: exchange, Romanovsky variation
+r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: exchange, Gligori\'c variation
+r1bqkbnr/1ppp1p1p/p1n3p1/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: fianchetto defense deferred
+r1bqkbnr/1ppp1ppp/p1B5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez: exchange variation
+r1bqkbnr/1ppp1ppp/p1n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna: Mengarini variation *
+r1bqkbnr/1ppp1ppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez
+r1bqkbnr/1ppp1ppp/p7/4p3/B2nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Bird's defense deferred
+r1bqkbnr/1ppp2pp/p1n5/4pp2/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Schliemann defense deferred
+r1bqkbnr/1ppppppp/p1n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Battambang opening *
+r1bqkbnr/2p2ppp/2p5/p2p4/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, Smyslov variation *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PP2NPPP/RNBQK2R b KQkq -
+French: Winawer, advance, 6...Ne7 *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PPQ2PPP/RNB1K1NR b KQkq -
+French: Winawer, classical variation *
+r1bqkbnr/2p2ppp/p1pp4/4p3/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Richter variation
+r1bqkbnr/2p2ppp/p1pp4/4p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, exchange variation
+r1bqkbnr/2p3pp/p1pp1p2/4p3/3PP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, Alapin variation
+r1bqkbnr/2pp1ppp/p1n5/1p2p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Caro variation
+r1bqkbnr/2pp1ppp/p7/np2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Taimanov (chase/wing/accelerated counterthrust) variation
+r1bqkbnr/4p1pp/p1p2p2/3p4/2Pp4/4PN2/PP3PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/4p1pp/p1p2p2/8/2pN1P2/4P3/PP4PP/RNBQK2R b KQkq -
+Nimzo-Indian: S\"amisch, Romanovsky variation *
+r1bqkbnr/4p1pp/p1p2p2/8/2pN4/4P3/PP3PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch, Keres variation *
+r1bqkbnr/4pppp/p1p5/2pp4/8/4PN2/PPPP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/4pppp/p1p5/2pp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/2P5/1P2PN2/P2P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: S\"amisch, O'Kelly variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/2P5/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p2p4/1pp5/3QP3/1B6/PPP2PPP/RNB1K2R w KQkq -
+Ruy Lopez: Noah's ark trap
+r1bqkbnr/6pp/p1p1pp2/3p4/2PN4/4P3/PP3PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: S\"amisch, Botvinnik variation *
+r1bqkbnr/p1pp1ppp/2n5/1p6/Q7/8/PPP1PPPP/RNB1KBNR w KQkq -
+Scandinavian, Mieses-Kotr\v c gambit *
+r1bqkbnr/p2p1ppp/1pn1p3/2p5/4P3/2NP1N2/PPP2PPP/R1BQKB1R b KQkq -
+Amsterdam attack *
+r1bqkbnr/p3pppp/2p5/2p5/2Pp1P2/6P1/PP1PP2P/RNBQK1NR b KQkq -
+Beefeater defense *
+r1bqkbnr/pp1n1ppp/2pp4/4p1N1/2BPP3/8/PPP2PPP/RNBQK2R b KQkq -
+Philidor: Hanham, Kmoch variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -
+Philidor: Hanham, Schlechter variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Philidor: Hanham, Delmar variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Philidor: Hanham, Krause variation
+r1bqkbnr/pp1npppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Steinitz variation
+r1bqkbnr/pp1p1p1p/2n3p1/2p1p3/2P4P/2NP4/PP2PPP1/R1BQKBNR b KQkq -
+Sicilian: Gloria variation *
+r1bqkbnr/pp1p1ppp/2n1p3/1N6/4P3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian, Sz\'en (`anti-Taimanov') variation
+r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Taimanov variation
+r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/2P5/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+English: Mikenas-Carls, Sicilian variation *
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/8/2N1PN2/PPPP1PPP/R1BQKB1R b KQkq -
+English: Mikenas-Carls, Kevitz variation *
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+English: Mikenas-Carls variation *
+r1bqkbnr/pp1p1ppp/2n5/2p5/3Pp3/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+English: Mikenas-Carls, Flohr variation *
+r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Labourdonnais-L\"owenthal variation
+r1bqkbnr/pp1ppp1p/2N3p1/8/4P3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian: accelerated fianchetto, exchange variation
+r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+English: Bremen, Smyslov system *
+r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Sicilian: Nimzovich-Rossolimo attack (with ...g6, without ...d6)
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+English: Bremen, reverse dragon *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+English: Bremen system, Keres variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2PP4/PP3PPP/RNBQKBNR b KQkq -
+English, Keres variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+English: Carls' Bremen system *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -
+English: Bremen system with ...g6 *
+r1bqkbnr/pp1ppp1p/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind
+r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: accelerated fianchetto, modern variation
+r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Sicilian: Nimzovich-Rossolimo attack (without ...d6)
+r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+English, Kramnik-Shirov counterattack *
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: symmetrical variation
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: symmetrical variation
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppppp/2n5/2p5/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld defense *
+r1bqkbnr/pp1ppppp/2n5/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian defense
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Sicilian: closed
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+English: Sicilian reversed *
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Sicilian: closed, 2...Nc6
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Sicilian: chameleon variation
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Sicilian: Grand Prix attack
+r1bqkbnr/pp1ppppp/2n5/2p5/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq -
+Venezolana opening
+r1bqkbnr/pp1ppppp/2n5/2p5/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/8/7Q/2N5/PPP1PPPP/R1B1KBNR b KQkq -
+Novosibirsk opening
+r1bqkbnr/pp2p1pp/2n2p2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Kmoch variation *
+r1bqkbnr/pp2pp1p/2n3p1/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Romanishin-Kasparov (Steiner) system *
+r1bqkbnr/pp2pp1p/2n5/2pp2p1/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Spike gambit *
+r1bqkbnr/pp2ppp1/2np4/2p4p/2P1P3/2N3P1/PP1P1P1P/R1BQKBNR w KQkq -
+Sicilian: Gloria variation
+r1bqkbnr/pp2pppp/2n5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+Nimzo-Indian defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/1P2P3/P1P2PPP/RNBQKBNR b KQkq -
+QGD: Alapin variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: semi-Slav *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4P3/PPP1BPPP/RNBQK1NR b KQkq -
+QGD: Charousek (Petrosian) variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+QGD: 3.Nc3 *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+QGD: 3...Nf6 *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/P3P3/1PP2PPP/RNBQKBNR b KQkq -
+QGD: Janowski variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3PP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+QGD Slav: Winawer counter-gambit *
+r1bqkbnr/pp2pppp/2n5/2pp4/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Old Indian: Ukrainian variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5B2/3P1N2/PPP1PPPP/RN1QKB1R b KQkq -
+Old Indian: Janowski variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch defense, Rubinstein variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch with c4 & Nc3 *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/6PN/PPPPP2P/RNBQKB1R b KQkq -
+Dutch defense: Bladel variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/8/3P2P1/PPP1PPBP/RNBQK1NR b KQkq -
+Modern defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian defense, 3.Nc3 *
+r1bqkbnr/pp2pppp/2n5/3P4/3p4/4P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch, von Hennig-Schara gambit *
+r1bqkbnr/pp2pppp/2n5/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch defense, 4.cd ed *
+r1bqkbnr/pp2pppp/2n5/3p4/3N4/6P1/PPP1PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld: exchange variation *
+r1bqkbnr/pp2pppp/2n5/3p4/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Nimzovich variation
+r1bqkbnr/pp2pppp/2n5/3p4/3p4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: exchange variation *
+r1bqkbnr/pp2pppp/2n5/8/1pPp4/P4N2/3PPPPP/RNBQKB1R w KQkq -
+Benk\"o gambit: Zaitsev system *
+r1bqkbnr/pp2pppp/8/n2P4/1Pp5/8/P4PPP/RNBQKBNR b KQkq b3
+QGD: Tarrasch defense, Tarrasch gambit *
+r1bqkbnr/pp3p1p/2n3p1/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian with e4 & g3 *
+r1bqkbnr/pp3pp1/2n4p/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Makagonov system (5.h3) *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: 4.e3 c5 *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/1P2PN2/P1PP1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: Fischer variation *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/2N1PN2/PPPP1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: 4.e3, Taimanov variation *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 O-O *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: 4.e3 *
+r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+French: advance, Paulsen attack
+r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR w KQkq -
+French: advance variation
+r1bqkbnr/pp3ppp/2n5/2P1p3/1PPp4/5N2/P3PPPP/RNBQKB1R b KQkq -
+QGA: Linares variation *
+r1bqkbnr/pp3ppp/2n5/2Ppp3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense, Alekhine variation *
+r1bqkbnr/pp3ppp/2n5/2p1p3/2PpP3/3P1NP1/PP3P1P/RNBQKB1R b KQkq -
+Czech Benoni: King's Indian system *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...e6 *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Panov-Botvinnik attack *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, open variation, main line
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...g6 *
+r1bqkbnr/pp3ppp/2n5/2ppp3/3P4/2P1P3/PP3PPP/RNBQKBNR w KQkq -
+QGD: semi-Slav, Marshall gambit *
+r1bqkbnr/pp3ppp/2n5/2ppp3/5P2/3P2P1/PPP1P1BP/RNBQK1NR b KQkq -
+Modern defense: Averbakh system, Randspringer variation *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/2NP2P1/PPP1PPBP/R1BQK1NR b KQkq -
+Modern defense: Averbakh system, Kotov variation *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Modern defense: Averbakh system *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/5NP1/PPPPPPBP/RNBQK2R w KQkq -
+King's Indian: 4.e4 *
+r1bqkbnr/pp3ppp/2n5/3p4/2pP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -
+QGD: Tarrasch, Folkestone (Swedish) variation
+r1bqkbnr/pp3ppp/2n5/3p4/2pPP3/2N2NP1/PP3P1P/R1BQKB1R b KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation
+r1bqkbnr/pp3ppp/2n5/3pp3/2PP4/8/PP3PPP/RNBQKBNR w KQkq -
+QGD: Tarrasch defense, Marshall gambit *
+r1bqkbnr/pp3ppp/2n5/4p3/2Pp4/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Benoni: 6.e4 *
+r1bqkbnr/pp3ppp/2n5/4p3/2Pp4/B2P1N2/4PPPP/RN1QKB1R w KQkq -
+Benk\"o gambit: 7.e4 *
+r1bqkbnr/pp3ppp/2np4/1N2p3/4P3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Labourdonnais-L\"owenthal (Kalashnikov) variation
+r1bqkbnr/pp4pp/2n2p2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, 5...O-O *
+r1bqkbnr/pp4pp/2n2p2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: S\"amisch variation *
+r1bqkbnr/pp4pp/2n5/2pppp2/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Four pawns attack *
+r1bqkbnr/pp4pp/2n5/4pp2/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: pawn storm variation *
+r1bqkbnr/pp4pp/2n5/5p2/2Ppp3/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: Mikenas variation *
+r1bqkbnr/ppnppppp/2p5/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+de Bruycker defense
+r1bqkbnr/ppp1pp1p/2n5/3p2p1/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch, Spielmann gambit *
+r1bqkbnr/ppp1pp1p/2np2p1/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Venezolana opening *
+r1bqkbnr/ppp1pppp/2n5/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn: Anti-Veresov *
+r1bqkbnr/ppp1pppp/2n5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Chigorin defense
+r1bqkbnr/ppp1pppp/2n5/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game, Chigorin variation
+r1bqkbnr/ppp1pppp/2n5/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Chigorin variation *
+r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense, Bogolyubov variation
+r1bqkbnr/ppp1pppp/2n5/8/2Pp4/3P2P1/PP2PP1P/RNBQKBNR b KQkq -
+Old Benoni: Schmid's system *
+r1bqkbnr/ppp1pppp/2n5/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Chigorin defense, Janowski variation
+r1bqkbnr/ppp1pppp/2n5/8/Q1Pp4/5N2/PP1PPPPP/RNB1KB1R b KQkq -
+Woozle defense *
+r1bqkbnr/ppp2p1p/2n3p1/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Sveshnikov system *
+r1bqkbnr/ppp2p1p/2n5/3pP1p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Tartakower variation *
+r1bqkbnr/ppp2p1p/2np4/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R w KQkq -
+Vienna: Hamppe-Allgaier gambit, Alapin variation
+r1bqkbnr/ppp2pp1/6n1/3p3p/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, 6.h4 *
+r1bqkbnr/ppp2ppp/2n1p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, Guimard variation
+r1bqkbnr/ppp2ppp/2n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR b KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4P3/PPPQ1PPP/RNB1K1NR b KQkq -
+French: Winawer, Petrosian variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Dr. Olland (Dutch) variation *
+r1bqkbnr/ppp2ppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR b KQkq -
+French: Winawer (Nimzovich) variation *
+r1bqkbnr/ppp2ppp/2n5/3p4/3Pp3/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Steinitz variation *
+r1bqkbnr/ppp2ppp/2n5/3p4/3Q4/2N5/PPP1PPPP/R1B1KBNR w KQkq -
+KP: Nimzovich defense, Marshall gambit *
+r1bqkbnr/ppp2ppp/2n5/3p4/Q3P3/8/PPP2PPP/RNB1KBNR b KQkq -
+Scandinavian: Anderssen counter-attack *
+r1bqkbnr/ppp2ppp/2n5/3pP3/8/4P3/PPP2PPP/RNBQKBNR b KQkq -
+French: Rubinstein variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/1P1P4/2P5/P3PPPP/RNBQKBNR b KQkq -
+Caro-Kann: Gurgenidze counter-attack *
+r1bqkbnr/ppp2ppp/2n5/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Marshall variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense, Bogolyubov variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2P3P1/PP2PP1P/RNBQKBNR b KQkq -
+Caro-Kann: Gurgenidze system *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Paulsen variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Blackmar-Diemer gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Blackmar-Diemer: Lemberg counter-gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Fyfe gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/2P5/PPNPPPPP/R1BQKBNR b KQkq -
+de Bruycker defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/2PP1N2/PP2PPPP/RNBQKB1R b KQkq -
+Pirc: Ufimtsev-Pytel variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Pirc defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR b KQkq -
+Robatsch (modern) defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -
+Robatsch defense *
+r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+QGD: Albin counter-gambit, Alapin variation
+r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+QGD: Albin counter-gambit, 5.g3
+r1bqkbnr/ppp2ppp/2np4/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: old Steinitz defense
+r1bqkbnr/ppp2ppp/3p4/8/3QP3/3B4/PPP2PPP/RNB1K2R b KQkq -
+Scotch: Ghulam Kassim variation
+r1bqkbnr/ppp2ppp/8/3p4/8/2P2P2/PP2PP1P/RNBQKB1R b KQkq -
+Caro-Kann: Bronstein-Larsen variation *
+r1bqkbnr/ppp2ppp/8/3p4/8/2P2P2/PP3PPP/RNBQKB1R b KQkq -
+Caro-Kann: Tartakower (Nimzovich) variation *
+r1bqkbnr/ppp2ppp/8/3pn3/3Q4/4P3/PPP2PPP/RNB1KBNR b KQkq -
+French: Frere (Becker) variation *
+r1bqkbnr/ppp2ppp/8/3pn3/5B2/2P5/PP2PPPP/RN1QKBNR b KQkq -
+Caro-Kann: classical variation *
+r1bqkbnr/ppp2ppp/8/3pn3/8/2P5/PP1NPPPP/R1BQKBNR b KQkq -
+Caro-Kann: Steinitz variation *
+r1bqkbnr/ppp2ppp/8/3pn3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/ppp2ppp/8/3pn3/8/4P3/PPPN1PPP/R1BQKBNR b KQkq -
+French: Rubinstein variation *
+r1bqkbnr/ppp3pp/2n2p2/3pP3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Rasa-Studier gambit *
+r1bqkbnr/ppp3pp/2n2p2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Steinitz variation
+r1bqkbnr/ppp3pp/2n2p2/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -
+QGD: Albin counter-gambit, Janowski variation
+r1bqkbnr/ppp3pp/2n5/3p1p2/3Pp2P/2P3P1/PP2PPB1/RNBQK1NR b KQkq -
+Robatsch defense: Gurgenidze variation *
+r1bqkbnr/ppp3pp/2n5/3ppP2/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Steinitz gambit *
+r1bqkbnr/ppp3pp/2n5/3ppp2/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Austrian attack *
+r1bqkbnr/ppp3pp/2n5/3ppp2/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: Pseudo-Austrian attack *
+r1bqkbnr/ppp3pp/2n5/5p2/2pPp3/2N1P3/PP1N1PPP/R1BQKB1R b KQkq -
+French: Steinitz variation *
+r1bqkbnr/ppp3pp/2np4/3Ppp2/4P3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Ponziani counter-gambit, Schmidt attack
+r1bqkbnr/ppp3pp/2np4/4N3/3Pp3/8/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit *
+r1bqkbnr/ppp3pp/2np4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit, Steinitz variation *
+r1bqkbnr/ppp3pp/6n1/3p1p2/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, Mar\'oczy attack *
+r1bqkbnr/pppn1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Hanham variation
+r1bqkbnr/pppn1ppp/4p3/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+French: Rubinstein variation
+r1bqkbnr/pppn1ppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, open, 4.ed ed *
+r1bqkbnr/pppn1ppp/8/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, open variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P1P2/4P3/PPP3PP/RNBQKBNR b KQkq -
+French: Tarrasch, Haberditz variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/1QP5/PP2PPPP/RNB1KBNR b KQkq -
+Caro-Kann: Edinburgh variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/2N1P3/PPP2PPP/R1BQKBNR b KQkq -
+French: Tarrasch, Guimard variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: 3.Nd2 *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Tarrasch *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French: Tarrasch, closed variation *
+r1bqkbnr/pppn2pp/3p4/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Keres variation *
+r1bqkbnr/pppnpppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Valencia opening *
+r1bqkbnr/pppp1p1p/2n3p1/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: fianchetto (Smyslov/Barnes) defense
+r1bqkbnr/pppp1p1p/2n3p1/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -
+Three knights: Steinitz, Rosenthal variation
+r1bqkbnr/pppp1p1p/2n3p1/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: closed *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: closed, Korchnoi variation *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Steinitz variation
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Paulsen variation *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna: Paulsen-Mieses variation *
+r1bqkbnr/pppp1p1p/2n5/1B2p1p1/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Brentano defense
+r1bqkbnr/pppp1p1p/2n5/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Neumann defense
+r1bqkbnr/pppp1p1p/2n5/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R b KQkq -
+Vienna: Hamppe-Allgaier gambit
+r1bqkbnr/pppp1p1p/2n5/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Blachly gambit
+r1bqkbnr/pppp1p1p/2n5/6p1/3PPp2/2N2N2/PPP3PP/R1BQKB1R b KQkq -
+Vienna: Pierce gambit
+r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -
+KGA: Muzio gambit, Holloway defense
+r1bqkbnr/pppp1p1p/2n5/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQ1RK1 b kq -
+Vienna: Hamppe-Muzio gambit
+r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez (Spanish opening)
+r1bqkbnr/pppp1ppp/2n5/1B6/3pP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Scotch: Relfsson gambit (`MacLopez')
+r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: Mayet defense
+r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+King's pawn game
+r1bqkbnr/pppp1ppp/2n5/4p3/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -
+Dresden opening
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: three knights system
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+Sicilian: closed, 2...Nc6 *
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: Sicilian reversed
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: closed *
+r1bqkbnr/pppp1ppp/2n5/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: Scandinavian variation *
+r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Vienna: Fyfe gambit
+r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Scotch opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Three knights game
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Vienna: Paulsen variation
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Vienna game, Max Lange defense *
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna game, Max Lange defense
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+Ponziani opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Vienna: Falkbeer variation *
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+King's pawn game
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq -
+Inverted Hungarian
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -
+Konstantinopolsky opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Vienna game *
+r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Vienna gambit
+r1bqkbnr/pppp1ppp/2n5/4p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/pppp1ppp/2n5/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+r1bqkbnr/pppp1ppp/2n5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Maurian defense
+r1bqkbnr/pppp1ppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqkbnr/pppp1ppp/2n5/8/2Q1P3/8/PPP2PPP/RNB1KBNR b KQkq -
+Center game: Hall variation
+r1bqkbnr/pppp1ppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch game
+r1bqkbnr/pppp1ppp/2n5/8/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: S\"amisch attack *
+r1bqkbnr/pppp1ppp/2n5/8/3P4/4p3/PPPNPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Spielmann variation *
+r1bqkbnr/pppp1ppp/2n5/8/3PPp2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Vienna: Steinitz gambit
+r1bqkbnr/pppp1ppp/2n5/8/3QP3/8/PPP2PPP/RNB1KBNR w KQkq -
+Center game
+r1bqkbnr/pppp1ppp/2n5/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Scotch: G\"oring gambit
+r1bqkbnr/pppp1ppp/2n5/8/4P3/4Q3/PPP2PPP/RNB1KBNR b KQkq -
+Center game: Paulsen attack
+r1bqkbnr/pppp1ppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -
+Vienna gambit
+r1bqkbnr/pppp1ppp/2n5/8/8/3Q4/PPP1PPPP/RNB1KBNR b KQkq -
+Scandinavian: Pytel-Wade variation *
+r1bqkbnr/pppp1ppp/8/1B2p3/3nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Bird's defense
+r1bqkbnr/pppp1ppp/8/4n3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Irish (Chicago) gambit
+r1bqkbnr/pppp1ppp/8/4p3/3nP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Lolli variation
+r1bqkbnr/pppp1ppp/8/nB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Pollock defense
+r1bqkbnr/pppp2pp/2n2p2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Nuremberg variation
+r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: Schliemann defense, Berger variation
+r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Schliemann defense
+r1bqkbnr/pppp2pp/2n5/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Latvian: Fraser defense
+r1bqkbnr/pppp2pp/2n5/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Keres (Mason-Steinitz) gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Rousseau gambit
+r1bqkbnr/pppp2pp/2n5/4pp2/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: Grand Prix attack *
+r1bqkbnr/pppp2pp/2n5/4pp2/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Pelikan variation *
+r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Milner-Barry variation *
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Winawer defense (Gothic defense)
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani counter-gambit
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/5p2/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -
+Center game: l'Hermet variation
+r1bqkbnr/pppp3p/2n5/4Ppp1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Bird's opening, Swiss gambit *
+r1bqkbnr/ppppp1pp/2n2p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KP: Neo-Mongoloid defense
+r1bqkbnr/ppppp1pp/2n5/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+KP: Colorado counter
+r1bqkbnr/pppppppp/2n5/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Lundin (Kevitz-Mikenas) defense
+r1bqkbnr/pppppppp/2n5/8/3PP3/2P5/P4PPP/RNBQKBNR b KQkq -
+KP: Nimzovich defense, Wheeler gambit
+r1bqkbnr/pppppppp/2n5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Dunst (Sleipner,Heinrichsen) opening *
+r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Dunst (Sleipner, Heinrichsen) opening *
+r1bqkbnr/pppppppp/n7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Lemming defense
+r1bqkbnr/pppppppp/n7/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Durkin's attack *
+r1bqnrk1/p2p1ppp/1pn1p3/2p5/2PPP3/P1PB4/4NPPP/R1BQK2R w KQ -
+Nimzo-Indian: S\"amisch, Capablanca variation
+r1bqnrk1/pp2b1pp/2n2p2/2p1p3/3pPP2/3P2P1/PPPNN1BP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, main line *
+r1bqnrk1/pp2b2p/2n2p2/2p1p1p1/3pPP2/3P2P1/PPPNN1BP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, Benk\"o attack *
+r1bqnrk1/pp2bppp/2n5/2p1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, 9.Ne1 *
+r1bqr1k1/1p1n1pbp/p2p1np1/2pP4/P7/2N3P1/1P1NPPBP/R1BQ1RK1 w - -
+Benoni: fianchetto, 11...Re8
+r1bqr1k1/p1p2ppp/2pp1n2/4p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: Janowski variation *
+r1bqr1k1/pp1n1ppp/2p2n2/b2pp3/4P3/P1NP1N2/1PP1BPPP/R2QBRK1 b - -
+Ruy Lopez: Kecskem\'et variation *
+r1bqr1k1/pp1n1ppp/2pb1n2/3pN1B1/3P1P2/2N5/PPP1B1PP/R2QK2R w KQ -
+Petrov: classical attack, Berger variation *
+r1bqr1k1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 w - -
+King's Indian: orthodox, 7...Nbd7, 8.Re1 *
+r1bqr1k1/pp2ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky, Winter variation *
+r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N2P2/PP1NB1PP/R1BQ1RK1 b - -
+Benoni: classical, 11.f3
+r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - -
+Benoni: classical with ...Re8 and ...Na6
+r1bqr1k1/ppb2pp1/2p1nn1p/3pp3/NPP1P3/P2P1NP1/2QBBP1P/R3R1K1 b - -
+Ruy Lopez: closed, Chigorin, Yugoslav system *
+r1bqr1k1/ppbn1pp1/2p2n1p/3pp3/1PP1P3/P1NP1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Chigorin, 12...Nc6 *
+r1bqr1k1/ppbn1pp1/2p2n1p/3pp3/1PP1P3/P2P1N2/1B1NBPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Breyer, Gligori\'c variation *
+r1bqr1k1/ppbn1pp1/2p2n1p/4p3/1PPpP1P1/P2P1N2/2Q1BP1P/RNB1K2R b KQ -
+Ruy Lopez: closed, Leonhardt variation *
+r1bqr1k1/ppbn1pp1/2p2n1p/4p3/1Pp1P3/P1NP1N2/2Q1BPPP/R1B2RK1 w - -
+Ruy Lopez: closed, Chigorin, Rauzer attack *
+r1bqr1k1/ppbn1pp1/5n1p/3pp3/NP2P3/P2P1N2/2Q1BPPP/R1B2RK1 w - -
+Ruy Lopez: closed, Chigorin, 12...c5d4 *
+r1bqr1k1/ppp2ppp/2n2n2/2bPN3/3P4/2N5/PPP2PPP/R1BQKB1R w KQ -
+two knights defense: Canal variation *
+r1bqr1k1/ppp2ppp/2n2n2/3pp3/1b2P3/2NP1N2/PPPBBPPP/R2Q1RK1 b - -
+Ruy Lopez: Berlin defense, Tarrasch trap *
+r1bqr1k1/ppp2ppp/2n2n2/4N3/3PpP2/P1P5/2P3PP/R1BQKB1R w KQ -
+Ruy Lopez: Steinitz defense deferred, Boleslavsky variation *
+r1bqr1k1/ppp2ppp/2np1n2/8/1bB1P3/2N1Q2N/PPPB1PPP/2KR3R b - -
+Center game: Kupreichik variation
+r1bqr1k1/ppp2ppp/8/2PPn3/2B2Qn1/2N1Bp2/PPP2PPP/R3K2R w KQ -
+two knights: Max Lange attack, Marshall variation *
+r1bqr1k1/ppp2ppp/8/2PPn3/5Qn1/2N1Bp2/PPP2PPP/R3KB1R b KQ -
+two knights: Max Lange attack, Rubinstein variation *
+r1bqr1k1/ppp2ppp/8/3pn3/3Q4/P1P1B3/1PP2PPP/R3KB1R b KQ -
+Four knights: Spielmann variation *
+r1bqr1k1/ppp4p/8/2PPnpp1/6n1/1BN1BpQ1/PPP2PPP/2KR3R b - -
+two knights: Max Lange attack, Berger variation *
+r1bqr1k1/pppn1pbp/3p1np1/4p3/2PP4/2N1PN2/PP2BPPP/R1BQ1RK1 w - -
+R\'eti: King's Indian attack, French variation *
+r1bqr1k1/pppp1ppp/2n2n2/3NpQ2/1bP5/4PN2/PP1P1PPP/R1B1KB1R b KQ -
+English: four knights, Stean variation
+r1bqrbk1/pp3ppp/2n2n2/2ppp3/P3P3/2PP1NP1/1P1N1PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, 7...Nbd7, main line *
+r1bqrnk1/ppp1bppp/5n2/3p2B1/3P4/2NBP3/PPQ1NPPP/2KR3R b - -
+QGD: exchange, chameleon variation
+r1br2k1/p1q1ppbp/1pn2np1/2pp4/1P1P4/2P1PN2/PB1NBPPP/R2Q1RK1 b - -
+Catalan: closed, Spassky gambit *
+r1br2k1/p3ppbp/1pn2np1/2pq4/8/PP1PPN2/1B1NBPPP/R2QK2R b KQ -
+English: symmetrical, hedgehog, flexible formation *
+r1br2k1/p4ppp/1qn2n2/2b5/B3p3/2N3Q1/PPPPNPPP/R1B1K2R w KQ -
+Evans gambit: compromised defense, Potter variation *
+r1br2k1/pp2qppp/1bn1pn2/3p4/1PP5/P2BPN2/1B1N1PPP/R2QK2R b KQ -
+QGA: classical, Smyslov variation *
+r1br2k1/ppq2ppp/2n1pn2/2P5/1P1p4/P3PN2/1BQ2PPP/R3KB1R b KQ -
+QGA: classical, Flohr variation *
+r1q2rk1/pp2ppbp/2npbnp1/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -
+Sicilian: dragon, classical, R\'eti-Tartakower variation
+r1r3k1/pp1bppbp/2np1np1/q7/3NP2P/1BN1BP2/PPPQ2P1/2KR3R b - -
+Sicilian: dragon, Yugoslav attack, 12.h4
+r2n1rk1/ppp1qppp/3p1n2/1B2p1B1/3PP1b1/2P2N2/P1P2PPP/R2QR1K1 w - -
+Four knights: symmetrical, Capablanca variation
+r2q1bnr/ppp1kBpp/3p4/3NN3/4P3/8/PP3PPP/R1Bb1RK1 b - -
+Scotch: Sea-cadet mate
+r2q1knr/pppb1Bpp/1b1p4/n7/3PP3/2N2N2/P1Q2PPP/R1B2RK1 b - -
+Evans gambit: Fraser-Mortimer attack
+r2q1rk1/1b1nbppp/p2p1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Breyer, Gligori\'c variation
+r2q1rk1/1bp1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Flohr-Zaitsev system (Lenzerheide variation)
+r2q1rk1/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP1NQPPP/R1B2RK1 b - -
+Ruy Lopez: open, Malkin variation
+r2q1rk1/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP3PPP/RNBQR1K1 w - -
+Ruy Lopez: closed, Bogolyubov variation
+r2q1rk1/2p1bppp/p1npbn2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Kholmov variation
+r2q1rk1/2p1bppp/p3b3/1p1pn3/3Nn3/1BP5/PP3PPP/RNBQR1K1 w - -
+Ruy Lopez: open, Breslau variation
+r2q1rk1/2p2ppp/p1n1b3/1pbpP3/8/2P2N2/PPBN1nPP/R1BQ1RK1 w - -
+Ruy Lopez: open, Dilworth variation
+r2q1rk1/3nbppp/bpp1pn2/p2p4/2PP4/1P3NP1/PBQNPPBP/R4RK1 w - -
+Catalan: closed, Sokolsky variation
+r2q1rk1/p1p2ppp/2pp1n2/4p3/1b2P1b1/2NP1N2/PPP1QPPP/R1B2RK1 b - -
+Four knights: symmetrical, Metger unpin *
+r2q1rk1/p3bppp/1pn1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/2RQ1RK1 w - -
+QGD: Tarrasch, Stoltz variation
+r2q1rk1/p3n1pp/2p1bp2/3pp1B1/N1P5/6P1/PP2PbBP/R2Q1RK1 w - -
+Gr\"unfeld: exchange, Seville variation *
+r2q1rk1/p3n1pp/3bbp2/3pp3/N7/4B1P1/PP2PPBP/R2Q1RK1 b - -
+Gr\"unfeld: Spassky variation, main line, 13.Bd3 *
+r2q1rk1/p3n1pp/3bbp2/4p3/N2p4/4B1P1/PP2PPBP/R2Q1RK1 w - -
+Gr\"unfeld: exchange, Sokolsky variation *
+r2q1rk1/p3nppp/4b3/2bpp3/8/2N3P1/PP2PPBP/R1BQ1RK1 w - -
+Gr\"unfeld: Spassky variation, main line, 10...cd, 11.cd *
+r2q1rk1/p4ppp/2n1bn2/2bpp3/N7/1B1P1P2/PPP3PP/R1BQK1NR w KQ -
+Evans gambit: Steinitz variation *
+r2q1rk1/p4ppp/2n2n2/2bpp3/N5b1/1B1P4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: G\"oring attack *
+r2q1rk1/p4ppp/b1B2n2/2bp4/8/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Aitken variation *
+r2q1rk1/p4ppp/b1p2n2/2bpN3/3P4/2N5/PPP2PPP/R1BQK2R w KQ -
+Giuoco Piano: Steinitz variation *
+r2q1rk1/pb1nbppp/2p1pn2/1p1p4/2PP4/1PN2NP1/P1Q1PPBP/R1BR2K1 w - -
+Catalan: closed, Spassky gambit
+r2q1rk1/pp1bbppp/2nppn2/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: modern Scheveningen, main line with Nb3
+r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R b - -
+Sicilian: dragon, Yugoslav attack, 10.O-O-O
+r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -
+Sicilian: dragon, Yugoslav attack, 9...Bd7
+r2q1rk1/pp2b1pp/2n1bn2/2pp4/4pB2/1NN1P3/PPPQBPPP/2KR3R b - -
+Alekhine's defense: four pawns attack, Tartakower variation *
+r2q1rk1/pp2bpp1/2n2n1p/2pp1b2/5B2/1NNP2P1/PP2PPBP/R2Q1RK1 w - -
+Alekhine's defense: exchange, Karpov variation *
+r2q1rk1/pp2bppp/2n1bn2/3p2B1/2pP4/2N2NP1/PP2PPBP/2RQ1RK1 w - -
+QGD: Tarrasch, Bogolyubov variation
+r2q1rk1/pp2bppp/2npbn2/2p3B1/4P3/2N2N2/PPP1BPPP/R2QR1K1 b - -
+Philidor: Berger variation
+r2q1rk1/pp2pBbp/6p1/n1p5/3PP1b1/2P1BP2/P3N1PP/R2Q1RK1 b - -
+Gr\"unfeld: exchange, Seville variation
+r2q1rk1/pp2ppbp/1nnp2p1/5b2/2PP1B2/2N2N1P/PP2BPP1/R2Q1RK1 b - -
+Alekhine's defense: exchange, Karpov variation
+r2q1rk1/pp2ppbp/2n2np1/3p4/2PP2b1/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+QGD: Tarrasch, Prague variation, 9.Bg5 *
+r2q1rk1/pp2ppbp/3p1np1/n4P2/2b1P3/1NNBB3/PPP3PP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Spielmann variation
+r2q1rk1/pp2ppbp/4b1p1/n2P4/4P3/3BBP2/P3N1PP/R2Q1RK1 b - -
+Gr\"unfeld: exchange, Sokolsky variation
+r2q1rk1/pp2ppbp/4b1p1/n7/3PP3/3BBP2/P3N1PP/R2Q1RK1 w - -
+Gr\"unfeld: Spassky variation, main line, 13.Bd3
+r2q1rk1/pp2ppbp/5np1/n2p1P2/4P3/1NNPB3/PP4PP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Bernard defense
+r2q1rk1/pp4pp/1nnpb3/4p3/N2P1p2/5NP1/PP2PPBP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Bernard defense *
+r2q1rk1/ppp1b1pp/1nn1b3/4pp2/8/2NPBNP1/PP2PPBP/R1Q2RK1 b - -
+Sicilian: dragon, classical, R\'eti-Tartakower variation *
+r2q1rk1/ppp1b1pp/1nn1b3/4pp2/8/2NPPN2/PP1BBPPP/R2Q1RK1 w - -
+Sicilian: modern Scheveningen, main line with Nb3 *
+r2q1rk1/ppp1b1pp/2n1b3/3n1p2/4p3/1QNP1NP1/PP2PPBP/R1B2RK1 w - -
+Sicilian: dragon, classical, Zollner gambit *
+r2q1rk1/ppp1b1pp/2n1b3/3npp2/8/2NPPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: modern Scheveningen, main line *
+r2q1rk1/ppp1b1pp/2n1b3/3npp2/8/P1NPPN2/1PQ2PPP/R1B1KB1R w KQ -
+Sicilian: Scheveningen, classical *
+r2q1rk1/ppp1bppp/1nn1b3/4p3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, 9.Nb3 *
+r2q1rk1/ppp1bppp/1nn1b3/4p3/P7/2NP1NP1/1P2PPBP/R1BQ1RK1 b - -
+Sicilian: dragon, classical, Alekhine variation *
+r2q1rk1/ppp1bppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQ -
+Sicilian: dragon, classical, 8.O-O *
+r2q1rk1/ppp1ppbp/1nn3p1/8/3PP1b1/2NQBN2/PP2BPPP/2KR3R b - -
+Gr\"unfeld: Russian, Keres variation
+r2q1rk1/ppp1ppbp/2np1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, lesser Simagin (Spassky) variation
+r2q1rk1/ppp1ppbp/2np1np1/8/2PP2b1/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Simagin variation
+r2q1rk1/ppp2ppp/1bnp4/1B2p2n/3PP1b1/2PQ1N2/PP2NPPP/R1B2RK1 b - -
+Four knights: symmetrical, Blake variation *
+r2q1rk1/ppp2ppp/2n2n2/3pp3/1b2P1b1/2NP1N2/PPPBBPPP/R2QK2R w KQ -
+Ruy Lopez: closed Berlin defense, Bernstein variation *
+r2q1rk1/ppp2ppp/2np1n2/1B2p3/1b2P1b1/2NPBN2/PPP2PPP/R2Q1RK1 b - -
+Four knights: symmetrical, Tarrasch variation *
+r2q1rk1/ppp2ppp/2np1n2/1B2p3/1b2P1b1/3P1N2/PPP1NPPP/R1BQ1RK1 b - -
+Four knights: symmetrical, Pillsbury variation *
+r2q1rk1/ppp2ppp/2npbn2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Tarrasch variation
+r2q1rk1/ppp3pp/1nnbb3/2B1p3/N4p2/3P1NP1/PP2PPBP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Spielmann variation *
+r2q1rk1/ppp3pp/2n5/2bNp3/4P1b1/5N2/PPP1QPPP/R1B1K2R w KQ -
+Giuoco piano: Holzhausen attack *
+r2q1rk1/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQR1K1 w - -
+Ruy Lopez: Berlin defense, Tarrasch trap
+r2q1rk1/pppnbppp/8/8/1n6/2N3Q1/PPPP1PPP/R1BK2NR b - -
+Scotch: Rosenthal variation *
+r2q2k1/pp3ppp/8/2b1r3/3p4/3P4/PPP1NPPn/R1BQ1RK1 w - -
+Giuoco Piano: Therkatz-Herzog variation *
+r2qbrk1/1pp1bppp/p1np1n2/4p3/B2PP3/2P2N2/PP1N1PPP/R1BQR1K1 w - -
+Ruy Lopez: Kecskem\'et variation
+r2qk1nr/pp2bppp/2n1b3/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Semi-Averbakh system *
+r2qk1nr/pp2bppp/2n5/2p1p3/2Pp2b1/3PPNP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: Averbakh, main line *
+r2qk1nr/pp2bppp/2n5/2ppp3/2P3b1/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+King's Indian: Averbakh, 6...c5 *
+r2qk1nr/pp2bppp/2n5/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Averbakh system *
+r2qk1nr/pp4pp/2nbbp2/2ppp3/8/P1PP1NP1/1P2PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, Byrne variation *
+r2qk1nr/ppp1npbp/3pb1p1/3Np3/2P5/4P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+Sicilian: closed, Smyslov variation *
+r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -
+English: closed, Hort variation
+r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.Be3 *
+r2qk1nr/ppp2ppp/1bnp4/8/2BPP1b1/2N2N2/P4PPP/R1BQ1RK1 w kq -
+Evans gambit
+r2qk1nr/ppp2ppp/1bnp4/8/Q1BPP1b1/2N2N2/P4PPP/R1B2RK1 b kq -
+Evans gambit: Fraser attack
+r2qk1nr/ppp2ppp/2nb4/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Tarrasch variation *
+r2qk1nr/ppp2ppp/2np4/2b5/2BpP1b1/2P2N2/PP3PPP/RNBQ1RK1 w kq -
+Scotch gambit: Anderssen (Paulsen, Suhle) counter-attack
+r2qk1nr/ppp2ppp/2np4/b3p3/2BPP1b1/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Alapin-Steinitz variation
+r2qk1nr/pppb1ppp/2nb4/1B1p4/2PQ4/4P3/PP3PPP/RNB1K1NR w KQkq -
+French: Winawer, Kondratiyev variation *
+r2qk1nr/pppb1ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Sanders-Alapin variation
+r2qk2r/1b1n1ppp/p2bpn2/1pp5/3P4/1BN1PN2/PP2QPPP/R1BR2K1 w kq -
+QGA: classical, Smyslov variation
+r2qk2r/1b1nbppp/pp1ppn2/8/2PQ4/1PN2NP1/P3PPBP/R1BR2K1 w kq -
+English: symmetrical, hedgehog, flexible formation
+r2qk2r/1bppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w kq -
+Ruy Lopez: Trajkovi\'c counter-attack
+r2qk2r/1p1bbppp/p1nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/2P1n3/1B3N2/PP2QPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Howell attack, Adam variation
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, classical defense
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQR1K1 b kq -
+Ruy Lopez: open, 9...Be7, 10.Re1
+r2qk2r/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP2QPPP/RNB1K2R w KQkq -
+Ruy Lopez: Wormald attack, Gr\"unfeld variation
+r2qk2r/2p1nppp/p3b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 w kq -
+Ruy Lopez: open, Motzko attack, Nenarokov variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP1N1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, St. Petersburg variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Italian variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 b kq -
+Ruy Lopez: open, Motzko attack
+r2qk2r/3bbppp/p1nppB2/1p6/4PP2/2N2N2/PPPQ2PP/2KR1B1R b kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6
+r2qk2r/p1pn1ppp/8/3pp3/Np2b1Q1/1B6/PPP2K1P/R1B3R1 w kq -
+Evans gambit declined, Pavlov variation *
+r2qk2r/pp1bppbp/2n2np1/2ppN3/8/1P2P3/PBPPBPPP/RN1QK2R w KQkq -
+Queen's Indian: Opo\v censky variation *
+r2qk2r/pp2b1pp/2n1b3/2pnpp2/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w kq -
+King's Indian: Four pawns attack, main line *
+r2qk2r/pp2bpp1/2n2nb1/2p1p2p/3pP1PN/3P3P/PPPN1PB1/R1BQ1RK1 w kq -
+King's Indian: Petrosian system, Keres variation *
+r2qk2r/pp2bppp/2n1bn2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Gligori\'c-Taimanov system *
+r2qk2r/pp3ppp/2n1pn2/3p1b2/1b1P1B2/1QN1PN2/PP3PPP/R3KB1R w KQkq -
+QGD Slav: exchange, Trifunovi\'c variation
+r2qk2r/pp3ppp/2nbp3/3p4/3Pn1b1/1P3N2/PBP1BPPP/RN1Q1RK1 w kq -
+QGD: Pillsbury attack *
+r2qk2r/pp3ppp/2nbpn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Botvinnik variation *
+r2qk2r/ppp1b1pp/2n5/3p1p2/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 b kq -
+Petrov: classical attack, Krause variation
+r2qk2r/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB1N2/PP1N1PPP/R1BQR1K1 b kq -
+Petrov: classical attack, Berger variation
+r2qk2r/ppp1bppp/1nn1b3/4p3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -
+Sicilian: dragon, classical, Nottingham variation *
+r2qk2r/ppp1bppp/2n1b3/3np3/8/3P1NP1/PP2PPBP/RNBQK2R w KQkq -
+Sicilian: dragon, classical attack *
+r2qk2r/ppp1bppp/2n1b3/3np3/8/P1N1P3/1PQP1PPP/R1B1KBNR w KQkq -
+Sicilian: Taimanov variation *
+r2qk2r/ppp2p1p/2n1bPp1/2b3N1/2pp4/8/PPP2PPP/RNBQR1K1 w kq -
+two knights: Max Lange attack, Loman defense
+r2qk2r/ppp2pPp/2n1b3/2b5/2pp4/5N2/PPP2PPP/RNBQR1K1 b kq -
+two knights: Max Lange attack, Schlechter variation
+r2qk2r/ppp2ppp/2n1b3/2bnp3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+Sicilian: accelerated fianchetto, modern variation with Bc4 *
+r2qk2r/ppp2ppp/2n1b3/2bnp3/8/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Sozin, 7.Be3 *
+r2qk2r/ppp2ppp/2n5/3np3/1b4b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Margate (Alekhine) variation *
+r2qk2r/ppp2ppp/2np1n2/2b1p3/2B1P1b1/2NP1N2/PPP2PPP/R1BQK2R w KQkq -
+Giuoco Pianissimo: Canal variation *
+r2qk2r/ppp2ppp/2np1n2/2b5/2B1Pp2/2NP1Q1P/PPP3P1/R1B1K2R w KQkq -
+KGD: classical, Svenonius variation
+r2qk2r/ppp3pp/1bn1b3/3npp2/8/2NPPN2/PP2BPPP/R1BQ1RK1 w kq -
+Sicilian: Sozin, Fischer variation *
+r2qk2r/ppp3pp/2n5/3p1p2/2PPn1bb/3B1N2/PP3PPP/RNBQR1K1 w kq -
+Petrov: classical attack, Mar\'oczy variation
+r2qk2r/pppbbppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 b kq -
+Ruy Lopez: closed Berlin defense, Showalter variation
+r2qk2r/pppbbppp/2np1n2/1B2p1B1/3PP3/2N2N2/PPP2PPP/R2Q1RK1 b kq -
+Ruy Lopez: closed Berlin defense, Bernstein variation
+r2qk2r/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -
+Ruy Lopez: Berlin defense, hedgehog variation
+r2qkb1r/1bpp1ppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Archangelsk (counterthrust) variation
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/1P6/1QP1P3/P4PPP/RNB1K1NR b KQkq -
+QGD: semi-Slav, Junge variation *
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/1P6/2P1P3/P3QPPP/RNB1K1NR b KQkq -
+QGD: semi-Slav, Koomen variation *
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/PP6/2P1P3/5PPP/RNBQK1NR b KQkq -
+QGD: semi-Slav, Abrahams variation *
+r2qkb1r/1p1b1ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/2KR1B1R w kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7
+r2qkb1r/1p3ppp/p1npbn2/4p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Pelikan, Bird variation
+r2qkb1r/1ppbnppp/p1np4/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, Rubinstein variation
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP1QPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Howell attack
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, 8...Be6
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPPN1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Bernstein variation
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 9.c3
+r2qkb1r/2p2ppp/p1n1b3/1pn1P1N1/3p4/1BP5/PP1N1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Bernstein variation, Karpov gambit
+r2qkb1r/2p2ppp/p1n1b3/1pnpP3/8/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Berlin variation
+r2qkb1r/2p2ppp/p1pp1n2/4p3/3PP1b1/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred, Lipnitsky variation
+r2qkb1r/p2b1ppp/5n2/1B1pp3/Q7/4P3/PP3PPP/RNB1K2R b KQkq -
+QGD: Semi-Tarrasch, San Sebastian variation *
+r2qkb1r/p3pppp/2p5/2pn3b/4N3/5N1P/PPPP1PP1/R1BQK2R b KQkq -
+English: Nenarokov variation *
+r2qkb1r/p4ppp/2p1pn2/3p4/3p4/4P2P/PPP1QPP1/RNB2RK1 w kq -
+QGD: Lasker defense, main line *
+r2qkb1r/pb1n1ppp/2p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Wade variation
+r2qkb1r/pp1b1ppp/2n1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Opo\v censky variation *
+r2qkb1r/pp1bppp1/5n1p/1BpP4/4p3/2N5/PPP1QPPP/R3K1NR b KQkq -
+QGD: Albin counter-gambit, Kr\'enosz variation *
+r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Larsen variation
+r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Larsen variation, 7.Qd2
+r2qkb1r/pp1n1ppp/2n1p3/2Pp4/Q5b1/2P1PN2/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense, Rubinstein variation *
+r2qkb1r/pp1n1ppp/4pn2/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Capablanca variation *
+r2qkb1r/pp2n1pp/2n1bp2/2p1p3/3PP3/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox main line *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/4P3/2PP1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox, 7.Nge2 c6 *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/8/2NP1NP1/PPP1PPBP/1RBQ1RK1 b kq -
+King's Indian: S\"amisch, Ruban variation *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/8/P1NP1NP1/1PP1PPBP/R1BQ1RK1 b kq -
+King's Indian: S\"amisch, Panno formation *
+r2qkb1r/pp2pppp/2n2n2/1BPp4/6b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Ragozin, Vienna variation *
+r2qkb1r/pp2pppp/2n2n2/1Bpp3b/8/1P2PN1P/PBPP1PP1/RN1QK2R b KQkq -
+Queen's Indian: 4.Nc3, main line *
+r2qkb1r/pp2pppp/2n2n2/2Pp4/6b1/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav: 5.Bg5 dc *
+r2qkb1r/pp2pppp/2n2n2/2pp1b2/3P4/4PN2/PPP1BPPP/RNBQK2R w KQkq -
+QGD: classical variation (5.Bf4) *
+r2qkb1r/pp2pppp/2n2n2/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.Bf4 *
+r2qkb1r/pp2pppp/2n2n2/2pp4/2PP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch defense, Pillsbury variation *
+r2qkb1r/pp2pppp/2n2n2/2pp4/3P2b1/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.Bg5 *
+r2qkb1r/pp2pppp/2n2n2/2pp4/6b1/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Smyslov system *
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: exchange variation, 6.Bf4 Bf5 *
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD Slav: exchange variation, 6.Bf4 Bf5
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+QGD: exchange, S\"amisch variation *
+r2qkb1r/pp2pppp/2n2n2/8/2Pp2b1/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: Uhlmann variation *
+r2qkb1r/pp2pppp/2n2nb1/2pp4/6PN/1P2P2P/PBPP1P2/RN1QKB1R b KQkq -
+Queen's Indian: 4.Nc3, Botvinnik variation *
+r2qkb1r/pp2pppp/n1p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R w KQkq -
+QGD Slav: Dutch, Lasker variation
+r2qkb1r/pp2pppp/n1p2n2/8/P1pPP1b1/2N2N2/1P3PPP/R1BQKB1R w KQkq -
+QGD Slav: Smyslov variation
+r2qkb1r/pp3p1p/2n3p1/2Pp4/1P2p1b1/2P1PN2/P2N1P2/R1BQKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Lilienthal variation *
+r2qkb1r/pp3ppp/2n1b3/2pnp1N1/8/2N3P1/PP1PPPBP/R1BQK2R b KQkq -
+Sicilian: accelerated fianchetto, Breyer variation *
+r2qkb1r/pp3ppp/2n1bn2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Larsen variation *
+r2qkb1r/pp3ppp/2n1pn2/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with Bf4 & e3 *
+r2qkb1r/pp3ppp/2n1pn2/2pp3b/3P4/1P2PN1P/P1P1BPP1/RNBQ1RK1 b kq -
+QGD: Tartakower (Makagonov-Bondarevsky) system *
+r2qkb1r/pp3ppp/2n1pn2/2pp3b/3P4/4PN1P/PPP1BPP1/RNBQ1RK1 w kq -
+QGD: Neo-orthodox variation, 7.Bh4 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN1P/PPP1BPP1/RNBQ1RK1 b kq -
+QGD: Neo-orthodox variation *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 w kq -
+QGD: 6.Nf3 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 b kq -
+QGD: Orthodox defense *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P4/4Pb1P/PPP1BPP1/RNBQ1RK1 w kq -
+QGD: Neo-orthodox variation, 7.Bxf6 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/Q2P2b1/2P1PN2/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/Q2P4/2P1Pb2/PP1N1PPP/R1B1KB1R w KQkq -
+QGD: Cambridge Springs defense, Capablanca variation *
+r2qkb1r/pp3ppp/2n1pn2/2ppN2b/3P4/4P2P/PPP1BPP1/RNBQ1RK1 b kq -
+QGD: Lasker defense *
+r2qkb1r/pp3ppp/2n1pn2/3p3b/3N4/1P2P2P/P1P1BPP1/RNBQ1RK1 b kq -
+QGD: Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5 *
+r2qkb1r/pp3ppp/2n1pn2/3p4/Q2N2b1/2P1P3/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense, Yugoslav variation *
+r2qkb1r/pp3ppp/2n1pn2/3p4/Q2p2b1/2P1PN2/PP1N1PPP/R1B1KB1R w KQkq -
+QGD: Cambridge Springs defense, 7.cd *
+r2qkb1r/pp3ppp/2n2n2/2Ppp3/6b1/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD semi-Slav: Botvinnik system (anti-Meran) *
+r2qkb1r/pp3ppp/2n2n2/2pp4/3P2b1/2N2NP1/PP2PPBP/R1BQK2R w KQkq -
+QGD: Tarrasch, Wagner variation
+r2qkb1r/pp3ppp/2n2n2/2ppp3/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Alekhine variation *
+r2qkb1r/pp3ppp/2n2n2/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Zinnowitz variation *
+r2qkb1r/pp3ppp/2n2n2/4p3/2Pp2b1/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: classical, 8.Bg5 *
+r2qkb1r/pp3ppp/2n5/2Pp3P/1P2n3/2P1Pp1P/P4P2/RNBQKB1R w KQkq -
+QGD semi-Slav: Ekstrom variation *
+r2qkb1r/pp3ppp/2n5/2Pp3b/1P1Np1n1/2P1P2P/P4P2/RNBQKB1R b KQkq -
+QGD semi-Slav: anti-Meran, Alatortsev system *
+r2qkb1r/pp3ppp/2n5/2Pp3b/1P2p1n1/2P1PN1P/P4P2/RNBQKB1R w KQkq -
+QGD semi-Slav: anti-Meran gambit *
+r2qkb1r/ppp1p1pp/1nn1p3/2P5/3P2b1/5N2/PP4PP/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, Ilyin-Genevsky variation
+r2qkb1r/ppp2ppp/1nn5/4p3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Pod\v ebrady variation *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/2N1P3/PPQP1PPP/R1B1KBNR w KQkq -
+Sicilian: Taimanov variation *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/3P1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Sicilian: dragon, 6.Be3 *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Byrne (English) attack *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1N2/PP1BPPPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Larsen variation *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1NP1/PP2PP1P/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, Bondarevsky variation *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, 6...e6 *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 6.Bg5 *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/P2PPN2/1P3PPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf, 6...e6 *
+r2qkb1r/ppp2ppp/2n5/4p3/6b1/2nPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Richter attack *
+r2qkb1r/ppp2ppp/n1n5/4p3/1P2P1b1/P1NP1N2/5PPP/R1BQKB1R b KQkq -
+Sicilian: Pelikan, Chelyabinsk variation *
+r2qkb1r/ppp2ppp/n1n5/4p3/4P1b1/P1NPBN2/1P3PPP/R2QKB1R b KQkq -
+Sicilian: Pelikan, Bird variation *
+r2qkb1r/ppp2ppp/n7/4p3/1P1nPP2/P1NP4/5P1P/R1BQKB1R b KQkq -
+Sicilian: Sveshnikov variation *
+r2qkb1r/ppp3pp/2n1bn2/3p1p2/2PPp3/2N1P3/PP1N1PPP/R1BQKB1R w KQkq -
+French: Steinitz, Boleslavsky variation *
+r2qkb1r/ppp3pp/2n1bn2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.Be3 *
+r2qkb1r/ppp3pp/2n1bp2/3np3/8/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, 7...O-O *
+r2qkb1r/ppp3pp/2n1bp2/3np3/8/3P1NP1/PP2PPBP/RNBQK2R w KQkq -
+Sicilian: dragon, Yugoslav attack *
+r2qkb1r/ppp3pp/2n5/3npp2/1P4b1/P2PPN2/5PPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf, Polugayevsky variation *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/P2PPN2/1P2BPPP/RNBQK2R b KQkq -
+Sicilian: Najdorf, 7...Be7 *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/P2PPN2/1P3PPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 7.f4 *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/PQ1PPN2/1P3PPP/RNB1KB1R b KQkq -
+Sicilian: Najdorf, 7...Qb6 *
+r2qkb1r/pppb1ppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -
+Ruy Lopez: old Steinitz defense, Nimzovich attack
+r2qkb1r/pppb1ppp/2n2n2/1B6/Q3p3/2N5/PPP2PPP/R1B1K1NR w KQkq -
+Scandinavian: Anderssen counter-attack orthodox attack *
+r2qkb1r/pppb1ppp/2np1n2/1B6/3pP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -
+Ruy Lopez: closed Berlin defense, Wolf variation
+r2qkb1r/pppn2p1/8/3pNbPp/3Pn3/8/PPP2P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano defense, Caro variation *
+r2qkbnr/1p3ppp/p1n1p3/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Capablanca anti-Cambridge Springs variation *
+r2qkbnr/1pp2pp1/p1p5/4p2p/4P1b1/5N1P/PPPP1PP1/RNBQ1RK1 w kq -
+Ruy Lopez: exchange variation, Alapin gambit
+r2qkbnr/1pp3pp/p1np4/4pb2/B7/2P2N2/PP1P1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Siesta, Kopayev variation
+r2qkbnr/1ppb1p1p/p1np2p1/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, fianchetto (Bronstein) variation
+r2qkbnr/1ppb1ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense
+r2qkbnr/pp1b1ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+French: advance, Euwe variation
+r2qkbnr/pp1nppp1/2p3bp/7P/3P4/5NN1/PPP2PP1/R1BQKB1R b KQkq -
+Caro-Kann: classical, Spassky variation
+r2qkbnr/pp1nppp1/2p3bp/8/3P3P/5NN1/PPP2PP1/R1BQKB1R w KQkq -
+Caro-Kann: classical, 7...Nd7
+r2qkbnr/pp2pppp/2n5/1Bp4b/1PPp4/4PN1P/P2P1PP1/RNBQK2R b KQkq -
+Nimzo-Indian: Leningrad, ...b5 gambit *
+r2qkbnr/pp2pppp/2n5/1Bp4b/2Pp4/3PPN1P/PP3PP1/RNBQK2R b KQkq -
+Nimzo-Indian: Leningrad, main line *
+r2qkbnr/pp2pppp/2n5/1Bpp4/6b1/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Leningrad variation *
+r2qkbnr/pp2pppp/2n5/2pp1b2/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: Harrwitz attack *
+r2qkbnr/pp2pppp/2n5/2pp1b2/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: 4.Bf4 *
+r2qkbnr/pp2pppp/2n5/2pp4/2PP2b1/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD: Been-Koomen variation *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+QGD: 4.Bg5 Be7 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: 4.Bg5 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPPN1PPP/R1BQKB1R b KQkq -
+QGD: 4.Bg5 Nbd7 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Stockholm variation *
+r2qkbnr/pp2pppp/2n5/3p4/2Pp2b1/1Q2PN2/PP3PPP/RNB1KB1R b KQkq -
+QGD: Canal (Venice) variation *
+r2qkbnr/pp2pppp/2n5/3p4/2Pp2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch *
+r2qkbnr/pp2pppp/2n5/3p4/3P2b1/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+QGD: exchange, positional line, 5...c6 *
+r2qkbnr/pp2pppp/2n5/3p4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: exchange, positional line *
+r2qkbnr/pp3ppp/2n1p3/1Bpp4/3P2b1/4PN2/PPPN1PPP/R1BQK2R b KQkq -
+QGD: Manhattan variation *
+r2qkbnr/pp3ppp/2n1p3/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Gr\"unfeld gambit *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD: 5...c6 *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 b kq -
+QGD: 4.Bg5 Be7, 5.e3 O-O *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPPN1PPP/R1BQKB1R w KQkq -
+QGD *
+r2qkbnr/pp3ppp/2n1p3/2ppN3/3P2b1/4P3/PPP1BPPP/RNBQK2R b KQkq -
+QGD: Lasker variation *
+r2qkbnr/pp3ppp/2n5/2P5/N2p2b1/5N2/PP2PPPP/R1BQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Herzog defense *
+r2qkbnr/pp3ppp/2n5/2pp4/3P2b1/1QN2N2/PP2PPPP/R1B1KB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Reifir (Spielmann) variation *
+r2qkbnr/pp3ppp/2n5/2pp4/3P2b1/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, normal variation *
+r2qkbnr/pp3ppp/2n5/2pp4/Q2P2b1/2N2N2/PP2PPPP/R1B1KB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Czerniak variation *
+r2qkbnr/pp3ppp/2n5/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: accelerated Averbakh system *
+r2qkbnr/pp3ppp/4p3/3p4/3Q4/6P1/PPb1PPBP/RNB2RK1 w kq -
+Gr\"unfeld: Gr\"unfeld gambit accepted *
+r2qkbnr/pp3ppp/8/3pn3/8/8/PPP1NPPP/RNBQK2R b KQkq -
+Bishop's opening: Lisitsyn variation
+r2qkbnr/pp4pp/2n1bp2/2p1p3/3pP3/2PP1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox, 7.d5 c6 *
+r2qkbnr/pp4pp/2n1bp2/2p1p3/3pP3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: S\"amisch, orthodox, 7.d5 *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox variation *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/8/1P1P1NP1/P1P1PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, double fianchetto variation *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/8/2NP1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: S\"amisch, 6...Nc6 *
+r2qkbnr/ppp1p1pp/2n2p2/3p4/3P1Bb1/5N2/PPP1PPPP/RN1QKB1R w KQkq -
+Richter-Veresov attack, Richter variation *
+r2qkbnr/ppp1pppp/2n5/3p4/3P1B2/5b2/PPP1PPPP/RN1QKB1R w KQkq -
+Richter-Veresov attack, Veresov variation *
+r2qkbnr/ppp1pppp/2n5/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Richter-Veresov attack *
+r2qkbnr/ppp2p1p/2P5/8/2BP1pb1/2N2p2/PPP3PP/R1BQ1RK1 b kq -
+Vienna: Pierce gambit, Rushmere attack
+r2qkbnr/ppp2pp1/2n5/3p3p/2PPp1b1/4P3/PP1NBPPP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Breyer variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4P3/PPPNBPPP/RNBQ1RK1 b kq -
+French: Albin-Alekhine-Ch\^atard attack, Spielmann variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4P3/PPPNBPPP/RNBQK2R w KQkq -
+French: Albin-Alekhine-Ch\^atard attack *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4PP2/PPPNB1PP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Teichmann variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/P3P3/1PPNBPPP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Mar\'oczy variation *
+r2qkbnr/ppp2pp1/2n5/3pP2p/6b1/5NP1/PPPPP2P/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Alekhine variation *
+r2qkbnr/ppp2ppp/2n1b3/1B1p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Janowski variation *
+r2qkbnr/ppp2ppp/2n1b3/3p4/3Pp3/1P2P3/P1P1BPPP/RNBQK1NR b KQkq -
+French: classical, Frankfurt variation *
+r2qkbnr/ppp2ppp/2n1b3/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Henneberger variation *
+r2qkbnr/ppp2ppp/2n5/1B1p3b/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Bernstein variation *
+r2qkbnr/ppp2ppp/2n5/1B1p4/3P2b1/4Pp1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Chigorin variation *
+r2qkbnr/ppp2ppp/2n5/1B1p4/3Pp1b1/4PN2/PPP2PPP/RNBQK2R w KQkq -
+French: MacCutcheon, advance variation *
+r2qkbnr/ppp2ppp/2n5/1B1pp3/3P2b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+French: MacCutcheon variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3P2b1/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+French: exchange, Bogolyubov variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+French: exchange, Svenonius variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3Pp1b1/4P3/PPP1BPPP/RNBQK1NR b KQkq -
+French: classical, Vistaneckis (Nimzovich) variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R b KQkq -
+French: classical variation *
+r2qkbnr/ppp2ppp/2n5/3pN3/3Pp1b1/4P3/PPP1BPPP/RNBQK2R b KQkq -
+French: classical, Tartakower variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/1P3N2/P1PPP1PP/RNBQKB1R b KQkq -
+Dutch: Staunton gambit, Nimzovich variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/2P2N2/PP1PP1PP/RNBQKB1R b KQkq -
+Dutch: Staunton gambit, Chigorin variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French: Burn variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Staunton's line *
+r2qkbnr/ppp2ppp/2n5/3pp3/3P2b1/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+French: classical *
+r2qkbnr/ppp2ppp/2n5/3pp3/3P4/4Pb2/PPP1BPPP/RNBQK2R w KQkq -
+French: classical, Anderssen variation *
+r2qkbnr/ppp2ppp/2n5/3pp3/6b1/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Byrne variation *
+r2qkbnr/ppp2ppp/2npb3/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English, Tr\"oger defense
+r2qkbnr/ppp2ppp/8/3p4/1n1Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Alapin variation *
+r2qkbnr/ppp3pp/2n2p2/3pP3/6b1/5NP1/PPPPP2P/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Lasker variation *
+r2qkbnr/ppp3pp/2n5/3p1p2/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Steinitz variation *
+r2qkbnr/pppb1ppp/2B5/3p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R b KQkq -
+French: MacCutcheon, Lasker variation *
+r2qkbnr/pppb1ppp/2n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Bogolyubov variation *
+r2qkbnr/pppb1ppp/2n5/1B1p4/3Pp3/4P2P/PPPN1PP1/RNBQK2R b KQkq -
+French: MacCutcheon, Tartakower variation *
+r2qkbnr/pppb1ppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, fingerslip variation *
+r2qkbnr/pppb1ppp/2n5/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Caro variation
+r2qkbnr/pppb1ppp/2np4/1B2p3/2PPP3/5N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: old Steinitz defense, semi-Duras variation
+r2qkbnr/pppb2pp/2npP3/1B3p2/3p4/5N2/PPP2PPP/RNBQK2R b KQkq -
+KGD: Falkbeer, Morphy gambit *
+r2qkbnr/pppnpppp/8/3p4/6b1/5NP1/PPPPPPBP/RNBQK2R w KQkq -
+R\'eti: King's Indian attack, Keres variation
+r2qr1k1/p1p2ppp/2p2n2/3pp1B1/1b2P1b1/3P1N2/PPP1QPPP/R2N1RK1 b - -
+Four knights: symmetrical, Capablanca variation *
+r2qr1k1/p1p2ppp/5n2/1p1P3b/Q5P1/2N1Bn1P/PPP1KP2/R4B1R w - -
+two knights defense: Yurdansky attack *
+r2qr1k1/ppp1bppp/2n2n2/4p3/2P3b1/2NPBN2/PP2BPPP/R2Q1RK1 w - -
+Philidor: Berger variation *
+r2r2k1/ppq2ppp/2n1pn2/2bp4/2P5/2N1PN1P/PP1BQPP1/R4RK1 b - -
+QGD: Lasker defense, Russian variation *
+r3k1nr/ppp1qppp/2n5/4P3/1bPp4/5N1P/PP1BPPP1/R2QKB1R w KQkq -
+QGD: Albin counter-gambit, Kr\'enosz variation
+r3k2r/p2q1ppp/5n2/3pp3/1b6/4P3/PP3PPP/RNBQ1RK1 w kq -
+QGD: Semi-Tarrasch, Kmoch variation *
+r3k2r/ppp1qppp/2n1b3/2bnp3/8/2NPPN2/PP2BPPP/R1BQK2R w KQkq -
+Sicilian: Velimirovi\'c attack *
+r3k2r/ppp2ppp/2n1bP2/2b2qN1/2ppN3/8/PPP2PPP/R1BQR1K1 b kq -
+two knights: Max Lange attack, Marshall variation
+r3k2r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP1BPPBP/R2Q1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, 9...Bd7 *
+r3k2r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w kq -
+Sicilian: dragon, Yugoslav attack, 9.Bc4 *
+r3k2r/pppq2pp/2n1bp2/2bnp3/P7/2NP1NP1/1P2PPBP/R1BQ1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, Byrne variation *
+r3k2r/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -
+Sicilian: dragon, classical, Amsterdam variation *
+r3k2r/ppq1ppbp/2N3p1/2pp4/6n1/1P2P3/PBPP1PPP/RN1Q1RK1 w kq -
+Bogo-Indian defense, Monticelli trap *
+r3kb1r/1b3ppp/p2ppn2/qpn1P1B1/3N4/1BN5/PPPQ1PPP/2KRR3 b kq -
+Sicilian: Najdorf, Ivkov variation
+r3kb1r/1bq2ppp/p3pn2/1p1P4/2p5/2N1PN2/PPQ2PPP/R1BR2K1 w kq -
+QGA: classical, Flohr variation
+r3kb1r/1pp2ppp/p1p1b3/3q4/3PN3/8/PPP2PPP/R1BQR1K1 w kq -
+Four knights: Spielmann variation
+r3kb1r/5ppp/b3pn2/1p1qN1B1/3p4/3B4/PP2QPPP/R4RK1 b kq -
+QGD semi-Slav: Meran, Rellstab attack
+r3kb1r/p4ppp/1qp1pn2/3p4/3P4/3Q3P/PPP2PP1/RNB2RK1 b kq -
+QGD: Lasker defense, Bernstein variation *
+r3kb1r/pp1Npppp/1qn2n2/1Bp5/2p5/2N1P3/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, Karlsbad variation *
+r3kb1r/pp1b1ppp/nq2pn2/3p4/3P1B2/4PN2/PP3PPP/RNQ1KB1R w KQkq -
+QGD Slav: Landau variation *
+r3kb1r/pp1bpppp/1qn2n2/1Bp5/2N5/2N1P3/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, San Remo variation *
+r3kb1r/pp1qn1pp/2n1bp2/2ppp3/8/P1NP1NP1/1PP1PPBP/1RBQ1RK1 b kq -
+King's Indian: S\"amisch, Panno main line *
+r3kb1r/pp1qpppp/2np1n2/2p5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+Sicilian: Canal-Sokolsky attack, Bronstein gambit
+r3kb1r/pp2pppp/1qn2n2/2pp4/3P4/2P1PQ1P/PP3PP1/RNB1KB1R w KQkq -
+QGD/QGD semi-Slav: Hastings variation *
+r3kb1r/pp2pppp/2n2n2/2pq4/3P2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, Primitive Pillsbury variation *
+r3kb1r/pp2pppp/2n5/q1p5/1n1PP1b1/P4N2/1P3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, Krause variation *
+r3kb1r/pp3ppp/1qn1bn2/3pp1B1/2P5/6P1/PP1NPPBP/RN1Q1RK1 b kq -
+Gr\"unfeld defense: Smyslov, Yugoslav variation *
+r3kb1r/pp3ppp/1qn1bn2/3pp1B1/8/6P1/PPPNPPBP/RN1Q1RK1 w kq -
+Gr\"unfeld defense: Smyslov, main line *
+r3kb1r/pp3ppp/1qn1pn2/1B1p1b2/3P1B2/2N1PN2/PP3PPP/R2QK2R b KQkq -
+QGD Slav: exchange, Trifunovi\'c variation *
+r3kb1r/pp3ppp/1qn1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Rauzer variation *
+r3kb1r/pp3ppp/2n2q2/2Pp4/1P2p1b1/2P1PN2/P2N1P2/R1BQKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Szab\'o variation *
+r3kb1r/ppp1q1pp/2n5/3n4/1P2p1b1/P3PN2/2Q2PPP/RNB1KB1R w KQkq -
+Sicilian: Najdorf, Polugayevsky, Simagin variation *
+r3kb1r/ppp2ppp/2n1bP2/5qN1/2ppN3/8/PPP2PPP/R1BQR1K1 w kq -
+two knights: Max Lange attack, Rubinstein variation
+r3kb1r/ppp2ppp/2nq4/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Keres variation *
+r3kb1r/ppp3pp/2n1bq2/3npp2/8/2NPPN2/PP2BPPP/R1BQK2R w KQkq -
+Sicilian: Scheveningen, Tal variation *
+r3kb1r/ppp3pp/2n2q2/3npp1b/6P1/P2PPN1P/1P2BP2/RNBQK2R b KQkq -
+Sicilian: Najdorf, G\"oteborg (Argentine) variation *
+r3kb1r/ppp3pp/2n2q2/3npp1b/8/P2PPN1P/1PQ1BPP1/RNB1K2R b KQkq -
+Sicilian: Najdorf, Browne variation *
+r3kb1r/ppp3pp/2n2q2/3npp2/6b1/P2PPN2/1PQ1BPPP/RNB1K2R b KQkq -
+Sicilian: Najdorf variation *
+r3kb1r/pppq1ppp/2n1b3/3np3/8/P2PPN2/1P3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, English variation *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NP1N2/PP1BPPPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Larsen variation, 7.Qd2 *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NPPN2/PP2BPPP/R1BQK2R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P3PPP/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 *
+r3kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Rubinstein variation *
+r3kb1r/ppq2ppp/2n1pn2/2ppN3/3P4/4P2P/PPP1QPP1/RNB2RK1 w kq -
+QGD: Lasker defense, Teichmann variation *
+r3kb1r/ppq2ppp/2n1pn2/3p4/2Pp2b1/4PN2/PP1NBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein) *
+r3kb1r/ppqbpp1p/2n2np1/1Bp5/2N2P2/2N1P3/PP1P2PP/R1BQK2R w KQkq -
+Nimzo-Indian: Spielmann, St\aa hlberg variation *
+r3kb1r/ppqn1ppp/2n1p3/1Bpp3b/Q2P4/2P1PN2/PP1N1PPP/R1B2RK1 w kq -
+QGD: Cambridge Springs defense, Argentine variation *
+r3kb1r/ppqn1ppp/2n1p3/1Bpp4/Q2P2b1/2P1PN2/PP1N1PPP/R1B1K2R w KQkq -
+QGD: Cambridge Springs defense, Bogolyubov variation *
+r3kb1r/ppqn1ppp/2p2n2/4pb2/P1NP4/2N3P1/1P2PP1P/R1BQKB1R w KQkq -
+QGD Slav: Carlsbad variation
+r3kbnr/1ppb1ppp/p1p5/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq -
+Ruy Lopez: exchange, Alekhine variation
+r3kbnr/p1pb1ppp/2p5/3pN1q1/3Pp3/4P1PP/PPP2P2/RNBQK2R b KQkq -
+French: MacCutcheon, Lasker variation, 8...g6 *
+r3kbnr/pp1qpppp/8/2ppP3/2P3b1/6P1/PP2PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld: Lundin variation *
+r3kbnr/ppp2pp1/2n5/1B1p2qP/3P4/4P3/PPP2Pp1/RNBQK1R1 w Qkq -
+French: MacCutcheon, Grigoriev variation *
+r3kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPP1BPPP/RNBQK2R w KQkq -
+French: classical, Anderssen-Richter variation *
+r3kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Pollock variation *
+r3kbnr/pppq1ppp/2n1b3/3pp3/8/2PP1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Pirc: 150 attack *
+r3kbnr/pppq1ppp/2n5/1B1p4/Q7/4PP2/PPP2P1P/RNB1K2R b KQkq -
+French: MacCutcheon, Bogolyubov variation *
+r3kbnr/pppq1ppp/2n5/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Rubinstein variation *
+r3kbnr/ppq1pppp/2n5/3p4/3P2b1/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+QGD: exchange, positional line, 6.Qc2 *
+r3qrk1/ppp1b1pp/2n1b3/3npp2/8/P1NPPN2/1PQ1BPPP/R1B2RK1 b - -
+Sicilian: Scheveningen, classical main line *
+r3r1k1/1p1n1p1p/1bpqb1p1/p2p2B1/1P1N3Q/P1PBR3/5PPP/5RK1 b - -
+Ruy Lopez: Marshall, main line, Spassky variation *
+r3r1k1/2qbbp1p/p2p1np1/npp1p3/3PP3/2P1NN1P/PPB2PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Chigorin, Yugoslav system
+r3r1k1/ppp1qppp/2n5/3b4/2P1p3/8/P1PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: Berlin defense, Rio de Janeiro variation *
+r4b1r/ppp1kp2/2n1bN1p/q5p1/1P1p3B/5N2/P1P2PPP/R2QR1K1 b - -
+two knights defense: Yurdansky attack
+r4rk1/2pqb1pp/p1n1p3/1p1pP3/4R3/1BP5/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: open, Tarrasch trap
+r4rk1/2pqbppp/p1n1b3/3pP3/2B1n3/5N2/PP2QPPP/RNBR2K1 w - -
+Ruy Lopez: open, Howell attack, Ekstr\"om variation
+r4rk1/p4ppp/bqn2n2/2b5/B3p3/2N3Q1/PPPPNPPP/R1B1K2R w KQ -
+Evans gambit: compromised defense, Paulsen variation *
+r4rk1/pbqnppbp/1p3np1/2pp4/P2P4/BPP1PN2/3NBPPP/R2Q1RK1 b - -
+Catalan: closed, Sokolsky variation *
+r4rk1/pp1bqpp1/2n1pn1p/2p5/2BP4/2N1PN2/PPQ2PPP/R2R2K1 w - -
+QGD: Lasker defense, Russian variation
+r4rk1/pp2ppbp/3p1np1/q4P2/4P1P1/2N1B3/PPP1Q2P/R4RK1 b - -
+Sicilian: dragon, classical, Stockholm attack
+r4rk1/pp2qppp/3b4/3P4/1P1Qn1b1/B3PN2/5PPP/R3KB1R w KQ -
+QGD semi-Slav: Meran, Rellstab attack *
+r4rk1/ppp1q2p/2n1b3/4p1p1/Q4p2/3P1NP1/PP2PPBP/R4RK1 w - -
+Sicilian: dragon, classical, Stockholm attack *
+r4rk1/ppp3pp/2n1bq2/4pP2/8/5Q2/PPPP1K1P/RNB2BNR w - -
+KGA: Lolli gambit, Young variation *
+r4rk1/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, Richter variation *
+r4rk1/ppq1ppbp/2n2np1/2pp4/3P1Pb1/2P1PN2/PP2B1PP/RNB1QRK1 w - -
+Dutch: stonewall: Chekhover variation *
+r5nr/pp2k2p/2n2p2/2N1p2q/3pP3/3P2P1/PPP2PBP/RNB2RK1 b - -
+King's Indian: S\"amisch, orthodox, Bronstein variation *
+rn1q1rk1/1p3pbp/p2p1np1/2pP4/P3P1b1/2N2N2/1P2BPPP/R1BQ1RK1 w - -
+Benoni: classical with ...a6 and 10...Bg4
+rn1q1rk1/4ppbp/3p1np1/2pP4/4P3/2N2NP1/PP3PKP/R1BQ3R b - -
+Benk\"o gambit: main line
+rn1q1rk1/p3ppbp/bp3np1/2pp4/3P1P2/2P1PN2/PP2B1PP/RNBQ1RK1 w - -
+Dutch: stonewall with Ba3 *
+rn1q1rk1/pb1pbppp/1p2pn2/8/2PN4/1P1BP3/PB3PPP/RN1Q1RK1 b - -
+Queen's Indian: Averbakh variation
+rn1q1rk1/pb3ppp/1p1bp3/2pn4/8/1P2PN2/PB1PBPPP/RN1Q1RK1 w - -
+Queen's Indian: Averbakh variation *
+rn1q1rk1/pb3ppp/5n2/2b1p3/N2p4/1B1P4/PPP1NPPP/R1BQK2R b KQ -
+Evans gambit: Paulsen variation *
+rn1q1rk1/pb3ppp/5n2/2b1p3/N2p4/1B1P4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Ulvestad variation *
+rn1q1rk1/pb3ppp/8/1Bb5/4N1n1/5N2/PPPP1PPP/R1BQ1RK1 b - -
+Scotch gambit: Hanneken variation *
+rn1q1rk1/pbp1bppp/1p3n2/3pN1B1/3P4/2NBP3/PP3PPP/R2QK2R b KQ -
+QGD: Pillsbury attack
+rn1q1rk1/pbpp1ppp/1p2p3/6N1/2PP4/2n3P1/PPQ1PPBP/R3K2R b KQ -
+Bogo-Indian defense, Monticelli trap
+rn1q1rk1/pbppbppp/1p2p3/8/2PP4/2Q2NP1/PP2PPBP/R1B2RK1 b - -
+Queen's Indian: old main line, 9.Qxc3
+rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -
+Queen's Indian: Euwe variation
+rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Queen's Indian: old main line, 7.Nc3
+rn1q1rk1/pp1nppbp/6p1/2p5/3PP1b1/1QN1BN2/PP3PPP/R3KB1R w KQ -
+Gr\"unfeld defense: Smyslov, Yugoslav variation
+rn1q1rk1/pp2ppbp/2p2np1/3p1b2/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Gr\"unfeld: Flohr defense
+rn1q1rk1/pp2ppbp/2p2np1/3p4/2PP2b1/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Gr\"unfeld: Smyslov defense
+rn1q1rk1/pp2ppbp/2pp1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Larsen system
+rn1q1rk1/pp2ppbp/4bnp1/2Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K -
+Gr\"unfeld: Gr\"unfeld gambit, Botvinnik variation
+rn1q1rk1/pp3ppp/2p1p3/5b2/PbBPn1P1/2N1PN2/1P2QP1P/R1B2RK1 b - -
+QGD Slav: Dutch, S\"amisch variation
+rn1q1rk1/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P2QPPP/R1B2RK1 b - -
+QGD Slav: Dutch variation, main line
+rn1q1rk1/ppp1b1pp/1n2pp2/4Pb2/2PP4/2N2N2/PP2B1PP/R1BQ1RK1 w - -
+Alekhine's defense: four pawns attack, Korchnoi variation
+rn1q1rk1/ppp1ppbp/5np1/8/2QPP1b1/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Smyslov variation
+rn1q1rk1/ppp2ppp/3b4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQ1RK1 w - -
+Petrov: classical attack, Tarrasch variation
+rn1q1rk1/ppp2ppp/8/2bNp3/4P1b1/3P1N2/PPP2PPP/R1BQK2R b KQ -
+Giuoco piano *
+rn1q1rk1/ppp2ppp/8/2bP1b2/4nPP1/5N2/PPP1Q2P/RNB1KB1R w KQ -
+KGD: Falkbeer, Tarrasch variation
+rn1q1rk1/ppp3pp/8/2bNpp1b/4P1P1/5N1P/PPPP1P2/R1BQK2R w KQ -
+Giuoco piano: Rosentreter variation *
+rn1q1rk1/ppp3pp/8/3P1p2/3Pn1b1/3B1N2/PP3PPb/RNBQR1K1 w - -
+Petrov: classical attack, Marshall trap
+rn1q1rk1/pppnppbp/6p1/8/3PP1b1/1QN1BN2/PP3PPP/R3KB1R b KQ -
+Gr\"unfeld defense: Smyslov, main line
+rn1qk1nr/pb3ppp/8/2b1p3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Danish gambit: Schlechter defense *
+rn1qk1nr/pb3ppp/8/2b1p3/8/8/PPPPQPPP/RNB1KBNR b KQkq -
+Danish gambit: Collijn defense *
+rn1qk1nr/pp1bppbp/6p1/2pp4/5P2/4PN2/PPPPB1PP/RNBQK2R b KQkq -
+Dutch-Indian, Alekhine variation *
+rn1qk1nr/pp3ppp/2pb4/3p1b2/3P4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Caro-Kann: exchange, Rubinstein variation *
+rn1qk1nr/ppp1ppbp/3p2p1/8/2PPP1b1/5N2/PP3PPP/RNBQKB1R w KQkq -
+Robatsch defense: Rossolimo variation
+rn1qk1nr/ppp2ppp/8/2b1p3/Q3P1b1/2P2N2/PP1P2PP/RNB1KB1R b KQkq -
+KGD: classical, Marshall attack
+rn1qk2r/1bpp1ppp/1p2pn2/p7/1bPP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -
+Queen's Indian: Yates variation
+rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R w KQkq -
+Nimzo-Indian: 4.e3, Bronstein (Byrne) variation
+rn1qk2r/p4ppp/2p2n2/2bpp3/B3P1b1/2NP4/PPP2PPP/R1BQK1NR w KQkq -
+Evans gambit: Sokolsky variation *
+rn1qk2r/pb1pbppp/1p2pn2/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -
+English: symmetrical, hedgehog system
+rn1qk2r/pbpp1pp1/1p2pn1p/8/1bPP3B/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+Queen's Indian: 4.Nc3, main line
+rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Queen's Indian: Capablanca variation
+rn1qk2r/pbpp1ppp/5n2/1pb1p3/4P3/1BN5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, Cordel variation *
+rn1qk2r/pbppbppp/1p2p3/8/2PPn3/2N2NP1/PP1BPPBP/R2QK2R b KQkq -
+Queen's Indian: Opo\v censky variation
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R b KQkq -
+Queen's Indian: anti-Queen's Indian system
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -
+Queen's Indian: Riumin variation
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b kq -
+Queen's Indian: old main line, 6.O-O
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Queen's Indian: 5.Bg2 Be7
+rn1qk2r/pp1bppbp/5np1/1Bpp4/P7/1P2PN2/1BPP1PPP/RN1QK2R b KQkq -
+Queen's Indian: Yates variation *
+rn1qk2r/pp1bppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R b KQkq -
+Queen's Indian: Riumin variation *
+rn1qk2r/pp3ppp/2p1b3/3np3/1bB5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Paulsen attack *
+rn1qk2r/pp3ppp/2p1b3/3np3/1bB5/5Q2/PPPPNPPP/R1BNK2R b KQkq -
+Scotch: Paulsen, Gunsberg defense *
+rn1qk2r/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P3PPP/R1BQ1RK1 b kq -
+QGD Slav: Dutch variation
+rn1qk2r/pp3ppp/2p2n2/2bpp3/4P1b1/1BN5/PPPPQPPP/R1B1K1NR w KQkq -
+Giuoco Piano: Mestel variation *
+rn1qk2r/ppp2ppp/3pbn2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Ruy Lopez: Berlin defense, Kaufmann variation *
+rn1qk2r/ppp2ppp/8/2bP1b2/4nP2/5N2/PPP1Q1PP/RNB1KB1R w KQkq -
+KGD: Falkbeer, main line, 7...Bf5
+rn1qk2r/ppp3p1/8/2bpP1Pp/4b3/7P/PPP3K1/RNBQ1BNR w kq -
+KGA: Allgaier, Cook variation *
+rn1qk2r/pppbbppp/8/3pP3/N3n3/2PB1N1P/P1Q2PP1/R1B1K2R w KQkq -
+two knights defense: Knorre variation *
+rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1B2PN2/PP2QPPP/RNB2RK1 w kq -
+QGA: classical, 8...Bb7
+rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N3P1/PP3P1P/R1BQ1KNR b kq -
+Benk\"o gambit
+rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N5/PP2NPPP/R1BQ1K1R b kq -
+Benk\"o gambit: Ne2 variation
+rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+Benk\"o gambit: fianchetto variation
+rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -
+Benk\"o gambit: Nd2 variation
+rn1qkb1r/4pppp/b2p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Benk\"o gambit: 7.e4
+rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq -
+Queen's Indian: Nimzovich variation (exaggerated fianchetto)
+rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+English: Wimpey system *
+rn1qkb1r/pb1p1ppp/1p3n2/2pp2N1/2P5/6P1/PP2PPBP/RNBQK2R b KQkq -
+Queen's Indian: B\"urger variation
+rn1qkb1r/pb1p1ppp/1p3n2/2pp4/2P4N/6P1/PP2PPBP/RNBQK2R b KQkq -
+Queen's Indian: Rubinstein variation
+rn1qkb1r/pb1ppppp/1p3n2/2p3B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: Capablanca's variation *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: New York (London) defensive system *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+English: Caro-Kann defensive system *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/2P2NP1/PP2PP1P/RNBQKB1R b KQkq -
+English: Bled variation *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Queen's Indian: Marienbad system
+rn1qkb1r/pb1ppppp/1p3n2/8/2PQ4/5NP1/PP2PPBP/RNB1K2R b KQkq -
+Queen's Indian: Marienbad system, Berg variation
+rn1qkb1r/pbpp1p2/1p2p2p/6pn/2PP4/2N2NB1/PP2PPPP/R2QKB1R w KQkq -
+Queen's Indian: 4.Nc3, Botvinnik variation
+rn1qkb1r/pbpp1ppp/1p2pn2/8/2P1P3/2NB1N2/PP1P1PPP/R1BQK2R b KQkq -
+English: Queens Indian, Romanishin variation
+rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq -
+Queen's Indian: 4.g3 Bb7
+rn1qkb1r/pp1bpppp/5n2/1Bpp4/8/4PN2/PPPPQPPP/RNB1K2R b KQkq -
+Bogo-Indian defense, Nimzovich variation *
+rn1qkb1r/pp1n1ppp/4p3/3pNb2/3P4/2N1P3/PP3PPP/R1BQKB1R w KQkq -
+QGD Slav: Amsterdam variation
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: New York (London) defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -
+English: London defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD Slav: 4.e3 Bf5
+rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: Capablanca's variation
+rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -
+English: Torre defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p4/6b1/5NP1/PPPPPPBP/RNBQ1RK1 w kq -
+R\'eti: King's Indian attack, Yugoslav variation
+rn1qkb1r/pp2pppp/2p2n2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R b KQkq -
+QGD Slav: Krause attack
+rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R b KQkq -
+QGD Slav: Dutch variation
+rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Czech defense
+rn1qkb1r/pp2pppp/2p2n2/8/P1pP2b1/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Steiner variation
+rn1qkb1r/pp2pppp/2pp4/3nP3/3P2b1/5N2/PPP1BPPP/RNBQK2R w KQkq -
+Alekhine's defense: modern, Flohr variation
+rn1qkb1r/pp2pppp/5n2/1Bpp4/3P2b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Vienna variation *
+rn1qkb1r/pp2pppp/5n2/2p5/1PPp2b1/4PN2/P2P1PPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit, Dus-Chotimursky variation *
+rn1qkb1r/pp2pppp/5n2/2pp1b2/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: Miles variation *
+rn1qkb1r/pp2pppp/5n2/2pp4/3P2b1/4PN1P/PPP2PP1/RNBQKB1R b KQkq -
+QGD: Capablanca-Duras variation *
+rn1qkb1r/pp2pppp/5n2/2pp4/3P2b1/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD *
+rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: exchange variation
+rn1qkb1r/pp2pppp/5n2/8/1PPp2b1/5N1P/P2P1PP1/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit, Spielmann variation *
+rn1qkb1r/pp3ppp/2p1pn2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Wiesbaden variation
+rn1qkb1r/pp3ppp/4b3/2pnp3/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 6.Be3 *
+rn1qkb1r/ppn2ppp/2p1b3/4p3/2B5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Meitner variation *
+rn1qkb1r/ppp1pppp/1n1p4/3PP3/2P3b1/5N2/PP3PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Vitolins attack
+rn1qkb1r/ppp1pppp/1n1p4/4Pb2/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, Trifunovi\'c variation
+rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Old Indian: Janowski variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/2PP2b1/5N2/PP3PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Alekhine variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N1P/PPP2PP1/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Panov variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern variation, 4...Bg4
+rn1qkb1r/ppp1pppp/4bn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Flohr variation
+rn1qkb1r/ppp1pppp/5B2/3p1b2/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -
+Richter-Veresov attack, Veresov variation
+rn1qkb1r/ppp1pppp/5n2/3p1b2/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's bishop game *
+rn1qkb1r/ppp1pppp/5n2/3p1b2/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: London system *
+rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N2P2/PPP1P1PP/R2QKBNR b KQkq -
+Richter-Veresov attack, Richter variation
+rn1qkb1r/ppp1pppp/5n2/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Torre attack (Tartakower variation) *
+rn1qkb1r/ppp1pppp/5n2/3p4/6b1/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Torre attack *
+rn1qkb1r/ppp1pppp/5n2/3p4/6b1/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: Torre attack *
+rn1qkb1r/ppp1pppp/5n2/8/2pP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Janowsky-Larsen variation
+rn1qkb1r/ppp2ppp/4b3/4p3/1nB5/2N2Q2/PPPP1PPP/R1B1K1NR w KQkq -
+Scotch: Blumenfeld attack *
+rn1qkb1r/ppp2ppp/5n2/3pp3/2P3b1/4PN2/PP1P1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Torre attack, Wagner gambit *
+rn1qkb1r/ppp2ppp/8/3pP3/4n1b1/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq -
+Vienna gambit: Kaufmann variation
+rn1qkb1r/ppp3p1/8/3ppbPp/3Pn3/5N2/PPP2P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano defense *
+rn1qkb1r/pppb1ppp/8/1B2p2Q/1n6/2N5/PPPP1PPP/R1B1K1NR w KQkq -
+Scotch game *
+rn1qkbnr/1bpp1ppp/p7/1P6/3Q4/8/PP2PPPP/RNB1KBNR w KQkq -
+Sicilian: wing gambit, Marienbad variation *
+rn1qkbnr/1pp2ppp/p3p3/3P4/2B3b1/4PN2/PP3PPP/RNBQK2R b KQkq -
+QGA: Alekhine defense, Alatortsev variation
+rn1qkbnr/p1pppppp/bp6/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Guatemala defense
+rn1qkbnr/pp1b1ppp/4P3/1Bp5/4p3/8/PPP2PPP/RNBQK1NR b KQkq -
+QGD: Albin counter-gambit, Lasker trap *
+rn1qkbnr/pp1bpppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Sicilian: Canal-Sokolsky attack, 3...Bd7
+rn1qkbnr/pp2pppp/2p3b1/8/3P1P2/6N1/PPP3PP/R1BQKBNR b KQkq -
+Caro-Kann: classical, Mar\'oczy attack
+rn1qkbnr/pp2pppp/2p3b1/8/3P3P/6N1/PPP2PP1/R1BQKBNR b KQkq -
+Caro-Kann: classical, 6.h4
+rn1qkbnr/pp2pppp/2p3b1/8/3P4/6NN/PPP2PPP/R1BQKB1R b KQkq -
+Caro-Kann: classical, Flohr variation
+rn1qkbnr/pp2pppp/2p5/3p4/2P3b1/1P3N2/P2PPPPP/RNBQKB1R w KQkq -
+English: Caro-Kann defensive system, Bogolyubov variation
+rn1qkbnr/pp2pppp/2p5/3p4/4P1b1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Caro-Kann: two knights, 3...Bg4
+rn1qkbnr/pp2pppp/2p5/5b2/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: classical variation
+rn1qkbnr/pp2pppp/8/2p2bN1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Rubinstein variation *
+rn1qkbnr/pp2pppp/8/2pp4/6b1/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Neo-Indian (Seirawan) attack *
+rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/2P5/PP2BPPP/RNBQK1NR b KQkq -
+Caro-Kann: advance, Short variation
+rn1qkbnr/pp4pp/4b3/2pp4/4p3/1NN5/PPP1PPPP/R1BQKB1R w KQkq -
+Alekhine's defense: four pawns attack, 7.Be3 *
+rn1qkbnr/ppp1pppp/3p4/8/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Old Indian: Tartakower (Wade) variation
+rn1qkbnr/ppp1pppp/3p4/8/4P1b1/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+R\'eti: Wade defense
+rn1qkbnr/ppp1pppp/4b3/8/2p5/4PN2/PP1P1PPP/RNBQKB1R w KQkq -
+R\'eti accepted: Keres variation
+rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn, Mason variation, Steinitz counter-gambit *
+rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Grau (Sahovic) defense
+rn1qkbnr/ppp1pppp/8/3p1b2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn, Mason variation *
+rn1qkbnr/ppp1pppp/8/3p1b2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn: London system *
+rn1qkbnr/ppp1pppp/8/3p4/2P3b1/8/PP1PPPBP/RNBQK1NR b KQkq -
+Grob: Fritz gambit
+rn1qkbnr/ppp1pppp/8/3p4/3P2b1/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Queen's pawn: Anti-Veresov
+rn1qkbnr/ppp1pppp/8/3p4/3P2b1/8/PPP1PPPP/RNBQKBNR w KQkq -
+Levitsky attack (Queen's bishop attack) *
+rn1qkbnr/ppp1pppp/8/3p4/5Pb1/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, 2.Bg5 variation *
+rn1qkbnr/ppp1pppp/8/3p4/6b1/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Trompovsky attack (Ruth, Opo\v censk\'y opening) *
+rn1qkbnr/ppp1pppp/8/8/2Pp2b1/8/PP1PPPBP/RNBQK1NR w KQkq -
+Grob: Romford counter-gambit
+rn1qkbnr/ppp2ppp/2b1p3/8/3PN3/5N2/PPP2PPP/R1BQKB1R w KQkq -
+French: Fort Knox variation
+rn1qkbnr/ppp2ppp/3p4/4p3/2P3b1/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English, Smyslov defense
+rn1qkbnr/ppp2ppp/4b3/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Alapin variation *
+rn1qkbnr/ppp2ppp/8/3p4/5p2/6PB/PPPPP2P/RNBQK2R w KQkq -
+Amar gambit
+rn1qkbnr/pppb1ppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R w KQkq -
+Philidor: Boden variation
+rn2k2r/pbpp1ppp/8/2b1p3/Np2Q3/1B6/PPPP1qPP/R1BK2NR w kq -
+Evans gambit declined, Hicken variation *
+rn2k2r/pp4pp/1q3p2/1N1pN3/3Pn3/5K2/PPP3PP/R1BQ3R w kq -
+Giuoco Piano: Krause variation *
+rn2kb1r/pp1q1ppp/2p1b3/3np3/2B5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Blackburne attack *
+rn2kb1r/pp2pppp/2p2n2/q3Nb2/3P2P1/2N5/PPP2P1P/R1BQKB1R b KQkq -
+Scandinavian defense, Gr\"unfeld variation
+rn2kb1r/pp3ppp/2p1q3/1N6/3p4/5Q2/PP3PPP/1RB2RK1 b kq -
+Scotch: Gottschall variation *
+rn2kb1r/ppp1pppp/5n2/q4b2/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Scandinavian defense
+rn2kb1r/ppp1pppp/5n2/q7/3P2b1/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -
+Scandinavian defense, Lasker variation
+rn2kbnr/pp1b1ppp/1q2p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+French: advance, Wade variation
+rn2kbnr/pp1qpppp/3p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Canal-Sokolsky attack, Sokolsky variation
+rn2kbnr/ppp2ppp/8/q3p3/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Scandinavian: Anderssen counter-attack, Collijn variation
+rn3rk1/p1p1qpp1/1p2b2p/3p4/3P4/4PN2/PP3PPP/2RQKB1R w K -
+QGD: Tartakower variation
+rn3rk1/p4ppp/bqp5/2b1p3/N3n3/1B6/PPPQ1PPP/R1B1K1NR w KQ -
+Evans gambit: Levenfish variation *
+rnb1k1nr/p3qppp/2p1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Koomen variation
+rnb1k1nr/p4ppp/1qp1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Junge variation
+rnb1k1nr/pp1pq1pp/2p5/2b1pp2/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Bishop's opening: Lopez gambit *
+rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N2N2/PP3PPP/R1BQKB1R w KQkq -
+Pterodactyl defense
+rnb1k1nr/pp2ppbp/6p1/2qp4/8/4PN2/PPPN1PPP/R1BQKB1R w KQkq -
+Catalan: open, 5.Qa4 Nbd7, 6.Qxc4 *
+rnb1k1nr/pp2ppbp/6p1/q1Pp4/8/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: open, 5.Qa4 *
+rnb1k1nr/pp3ppp/2p5/2PP4/2B4q/5p2/PPP2PPP/RNBQ1RK1 b kq -
+Bishop's opening: Pratt variation *
+rnb1k1nr/pp3ppp/4p3/2pq4/1b1P4/2NB4/PPPB1PPP/R2QK1NR b KQkq -
+French: Winawer, Kondratiyev variation
+rnb1k1nr/ppp2pbp/3p4/4P1p1/2BP1p1q/2N5/PPP3PP/R1BQ1KNR b kq -
+KGA: bishop's gambit, Grimm attack
+rnb1k1nr/ppp2ppp/3b4/3B4/4Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Bor\'en-Svenonius variation
+rnb1k1nr/pppp1pbp/8/6p1/2B1P2q/2N2Qp1/PPPP3P/R1B2KNR b kq -
+KGA: bishop's gambit, Fraser variation
+rnb1k1nr/pppp1pbp/8/6p1/2B1Pp1q/2N3P1/PPPP3P/R1BQ1KNR b kq -
+KGA: bishop's gambit, McDonnell attack
+rnb1k1nr/pppp1ppp/8/2b1p1q1/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -
+Bishop's opening: del Rio variation
+rnb1k1nr/pppp1ppp/8/2b5/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Greco variation
+rnb1k1nr/pppp1ppp/8/4p3/1bB1Pq2/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+KGD: Norwalde variation, B\"ucker gambit
+rnb1k1nr/ppppqppp/1b1P4/4p3/2B1P3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano: Eisinger variation
+rnb1k1nr/pppq1ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer, Petrosian variation
+rnb1k1nr/ppq1ppbp/6p1/3p4/8/P3PN2/1PPN1PPP/R1BQKB1R w KQkq -
+Catalan: open, Alekhine variation *
+rnb1k1nr/ppq2ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq -
+French: Winawer, classical variation
+rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P1NPPP/R1B1KB1R b KQq -
+French: Winawer, advance, poisoned pawn, Konstantinopolsky variation
+rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P2PPP/R1BK1BNR b q -
+French: Winawer, advance, poisoned pawn, Euwe-Gligori\'c variation
+rnb1k2r/1pq1bpp1/p2ppn1p/8/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf, Browne variation
+rnb1k2r/1pq1bppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf variation
+rnb1k2r/2q1bp1p/p2p1n2/1ppPp1p1/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 w kq -
+Ruy Lopez: closed, Leonhardt variation
+rnb1k2r/p1pp1ppp/8/4p3/Np2n1Qq/1B6/PPPPKbPP/R1B3NR w kq -
+Evans gambit declined, V\'asquez variation *
+rnb1k2r/p4ppp/1qp2n2/2bpp3/B3P3/2NP4/PPP2PPP/R1BQK1NR w KQkq -
+Evans gambit: Tartakower attack *
+rnb1k2r/pp2ppbp/5np1/2pq4/8/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+Queen's Indian: Marienbad system, Berg variation *
+rnb1k2r/pp2qppp/1bp2n2/3pp1B1/1P2P3/P1NP1N2/2P1BPPP/R2QK2R b KQkq -
+Ruy Lopez: Wormald attack, Gr\"unfeld variation *
+rnb1k2r/pp3ppp/4p3/q7/1b1PP3/5N2/P2B1PPP/R2QKB1R w KQkq -
+QGD: Semi-Tarrasch, San Sebastian variation
+rnb1k2r/ppp1qppp/5n2/2p1P3/3p4/5N1P/PPP1BPP1/R1BQK2R b KQkq -
+two knights defense: Mar\'oczy variation *
+rnb1k2r/ppp1qppp/5n2/3P4/1bBp4/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Bishop's opening: Urusov gambit, Panov variation
+rnb1k2r/ppp2p1p/4pp2/q7/1b1P4/2N5/PPPQ1PPP/R3KBNR w KQkq -
+French: MacCutcheon, Bogolyubov variation
+rnb1k2r/ppp2p1p/5n2/3qN3/1b1P1ppP/2N5/PPP2KP1/R1BQ1B1R b kq -
+KGA: Kieseritsky, Brentano defense, Kaplanek variation
+rnb1k2r/ppp2ppp/1b6/3qp3/1PP5/P2P4/5PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Noah's ark trap *
+rnb1k2r/ppp2ppp/3b4/3qp3/8/3P4/PPP2PPP/R1BQKBNR w KQkq -
+Scotch: Ghulam Kassim variation *
+rnb1k2r/ppp2ppp/5n2/3qp3/1b6/2NP4/PP1QPPPP/R1B1KBNR b KQkq -
+Sicilian: Chekhover, Zaitsev variation *
+rnb1k2r/ppp2ppp/8/2bPp3/2B3nq/2N4N/PPPP1PPP/R1BQK2R w KQkq -
+Scotch gambit: Vitzhum attack *
+rnb1k2r/ppp2ppp/8/3Pp3/2qP4/2N3P1/PPP2K1P/R1BQ3R b kq -
+Scotch gambit: Cochrane-Shumov defense *
+rnb1k2r/ppp2ppp/8/3np3/8/P1P5/1PPB1PPP/R3KBNR b KQkq -
+Ruy Lopez: exchange, Alekhine variation *
+rnb1k2r/ppp2ppp/8/3q4/4nP2/8/PPPNQbPP/RNBK1B1R b kq -
+KGD: Falkbeer, Alapin variation
+rnb1k2r/ppp3p1/3q1n2/2bppP1p/6P1/3P3P/PPP2PB1/RNBQK1NR w KQkq -
+KGA: Philidor gambit, Schultz variation *
+rnb1k2r/pppnqppp/4p3/1N1pP3/3P4/8/PPP2PPP/R2QKBNR b KQkq -
+French: classical, Alapin variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P1P2/2N5/PPP3PP/R2QKBNR b KQkq -
+French: classical, Steinitz variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq -
+French: classical, Pollock variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPPQ1PPP/R3KBNR b KQkq -
+French: classical, Rubinstein variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2NB4/PPP2PPP/R2QK1NR b KQkq -
+French: classical, Tarrasch variation
+rnb1k2r/pppnqppp/8/2p1P3/2Bp4/5N1P/PPP2PP1/R1BQK2R w KQkq -
+two knights defense: Yankovich variation *
+rnb1k2r/pppp1ppp/3b1q2/8/N3P1n1/2P2N2/P1Q2PPP/R1B1KB1R w KQkq -
+two knights defense: Paoli variation *
+rnb1k2r/pppp1ppp/5q2/8/NP2P1n1/5N2/P4PPP/R1BQKB1R b KQkq -
+two knights defense: Blackburne variation *
+rnb1k2r/pppp1ppp/5q2/8/Nb2P1n1/2P2N2/P4PPP/1RBQKB1R b Kkq -
+two knights defense: Colman variation *
+rnb1k2r/pppp1ppp/5q2/8/Nb2P1n1/2P2N2/P4PPP/R1BQKB1R w KQkq -
+two knights defense: Bogolyubov variation *
+rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N3P1/PPP4P/R1BQ1KNR b kq -
+KGA: bishop's gambit, McDonnell attack
+rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N5/PPP3PP/R1BQ1KNR w kq -
+KGA: bishop's gambit, classical defense
+rnb1k2r/ppppqppp/4pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -
+Bogo-Indian defense, Nimzovich variation
+rnb1k2r/ppppqppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Wormald (Alapin) attack *
+rnb1kb1N/ppp3pp/5n2/3p4/2B1p3/8/PPPP1PqP/RNBQKR2 w Qkq -
+Latvian: Behting variation
+rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq -
+Sicilian: Najdorf, Poisoned pawn variation
+rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 7...Qb6
+rnb1kb1r/1pq2ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen (Paulsen), classical variation
+rnb1kb1r/2q2ppp/p3pn2/1p2P1B1/3N4/2N5/PPP1Q1PP/R3KB1R b KQkq -
+Sicilian: Najdorf, Polugayevsky, Simagin variation
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Ponziani: Leonhardt variation *
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+Ponziani: Steinitz variation *
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N5/PPPB1PPP/R2QKBNR b KQkq -
+Ponziani: Caro variation *
+rnb1kb1r/pp1p2pp/2p2n2/q3p1B1/2B1P3/8/PPP2PPP/RN1QK1NR w KQkq -
+KGD: classical, Marshall attack *
+rnb1kb1r/pp1ppppp/5n2/q1pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Woozle defense
+rnb1kb1r/pp2pppp/1qp2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav: S\"uchting variation
+rnb1kb1r/pp2pppp/5n2/q1Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA: Mannheim variation *
+rnb1kb1r/pp3pp1/2p1pq1p/3p4/2PP4/1QN2N2/PP2PPPP/R3KB1R b KQkq -
+QGD/QGD semi-Slav: Hastings variation
+rnb1kb1r/pp3ppp/1q2pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: Canal (Venice) variation
+rnb1kb1r/ppp1pppp/5n2/8/3q4/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq -
+Queen's pawn: Englund gambit *
+rnb1kb1r/ppp1q1pp/5n2/4Np2/2Bp1B2/8/PPP2PPP/RN1QK2R b KQkq -
+KGD: Falkbeer, main line, 7...Bf5 *
+rnb1kb1r/ppp1q2p/5n2/4Npp1/2Bp1B2/8/PPP2PPP/RN1Q1RK1 b kq -
+KGD: Falkbeer, Tarrasch variation *
+rnb1kb1r/ppp1qppp/5n2/3PN3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, Steinitz variation *
+rnb1kb1r/ppp1qppp/8/3n4/2N1p3/2N5/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov: modern attack, Bardeleben variation *
+rnb1kb1r/ppp2p1p/3p3n/4N3/2BPPppq/8/PPP3PP/RNBQ1K1R w kq -
+KGA: Salvio gambit, Anderssen counter-attack
+rnb1kb1r/ppp2ppp/5n2/3qN3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, main line *
+rnb1kb1r/ppp2ppp/5n2/3qp3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian, Chekhover variation *
+rnb1kb1r/ppp2ppp/5n2/3qp3/8/3P4/PPPB1PPP/RN1QKBNR b KQkq -
+Philidor: Boden variation *
+rnb1kb1r/ppp2ppp/5n2/4N3/3qp3/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Rellstab variation *
+rnb1kb1r/ppp2ppp/8/3NP2q/8/3P1Nn1/PPP4P/R1BQKB1R b KQkq -
+Vienna gambit, Wurzburger trap
+rnb1kb1r/ppp3pp/8/3q1p2/4nPP1/8/PPPNQ2P/R1B1KBNR b KQkq -
+KGD: Falkbeer, Charousek variation
+rnb1kb1r/pppp1p1p/7n/4N3/2BPP1pq/5p2/PPP3PP/RNBQ1K1R w kq -
+KGA: Silberschmidt gambit
+rnb1kb1r/pppp2p1/8/4pq1p/8/3B1N1P/PPPP1K2/RNBQ3R b kq -
+KGA: Allgaier, Horny defense *
+rnb1kb1r/ppppqppp/5n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Cozio (Lasker) attack *
+rnb1kb1r/ppq1p1pp/2pp1n2/5p2/2PP4/2N3P1/PP2PPBP/R1BQK1NR w KQkq -
+Dutch: Hort-Antoshin system
+rnb1kbnr/p1pp1ppp/8/1p6/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Bryan counter-gambit
+rnb1kbnr/pp1ppppp/8/q1p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Stiletto (Althouse) variation
+rnb1kbnr/pp2pppp/1qp5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+Caro-Kann: Edinburgh variation
+rnb1kbnr/pp2pppp/8/3q4/1p6/P7/1BPP1PPP/RN1QKBNR b KQkq -
+Sicilian: wing gambit, Marienbad variation
+rnb1kbnr/pp3ppp/2p1q3/4p3/8/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Center game: Charousek variation *
+rnb1kbnr/ppp1pp1p/3q4/3p2p1/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch, Von Pretzel gambit *
+rnb1kbnr/ppp1pppp/3q4/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Manhattan (Alapin, Ulvestad) variation *
+rnb1kbnr/ppp1pppp/3q4/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scandinavian: Pytel-Wade variation
+rnb1kbnr/ppp1pppp/8/q7/1P6/2N5/P1PP1PPP/R1BQKBNR b KQkq -
+Scandinavian, Mieses-Kotr\v c gambit
+rnb1kbnr/ppp1q1pp/3p4/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, R\'eti variation *
+rnb1kbnr/ppp1q1pp/8/4Np2/3p4/8/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Charousek gambit *
+rnb1kbnr/ppp2p1p/8/3B2p1/4Pp1q/6P1/PPPP3P/RNBQ1KNR b kq -
+KGA: bishop's gambit, Chigorin's attack (Gifford variation)
+rnb1kbnr/ppp2ppp/4p3/3q4/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+French: Frere (Becker) variation
+rnb1kbnr/ppp2ppp/4q3/4p3/5P2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Center game: l'Hermet variation *
+rnb1kbnr/ppp2ppp/4q3/4p3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Center game: Berger variation *
+rnb1kbnr/ppp2ppp/4q3/4p3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Center game: Paulsen attack *
+rnb1kbnr/ppp2ppp/8/2q1p3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Center game: Hall variation *
+rnb1kbnr/ppp2ppp/8/3p2q1/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Nimzovich variation *
+rnb1kbnr/ppp2ppp/8/3qp3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Center game *
+rnb1kbnr/ppp2ppp/8/3qp3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Center game *
+rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Scandinavian: Anderssen counter-attack, Goteborg system
+rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Scandinavian: Anderssen counter-attack
+rnb1kbnr/ppp3pp/3p1q2/8/3Pp3/4N3/PPP2PPP/RNBQKB1R b KQkq -
+Latvian: Nimzovich variation
+rnb1kbnr/pppp1B1p/8/4q3/5p2/5Q2/PPPP2PP/RNB2RK1 b kq -
+KGA: double Muzio gambit
+rnb1kbnr/pppp1p1p/8/4N3/2B1P1pq/5p2/PPPP2PP/RNBQ1K1R w kq -
+KGA: Cochrane gambit
+rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/5Q2/PPPP2PP/RNB2KNR b kq -
+KGA: bishop's gambit, classical defense, Cozio attack
+rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, classical defense
+rnb1kbnr/pppp1ppp/5q2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Greco defense
+rnb1kbnr/pppp1ppp/5q2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Napoleon's opening *
+rnb1kbnr/pppp1ppp/5q2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Norwalde variation
+rnb1kbnr/pppp1ppp/8/4p3/4P2q/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Patzer opening *
+rnb1kbnr/pppp2pp/5q2/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Breyer gambit *
+rnb1kbnr/ppppq1pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Carrera (Basman) gambit *
+rnb1kbnr/ppppq2p/8/4Np2/2BPPppP/8/PPP3P1/RNBQK2R b KQkq -
+KGA: Kieseritsky, Salvio defense, Cozio variation
+rnb1kbnr/ppppqp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Salvio (Rosenthal) defense
+rnb1kbnr/ppppqp1p/8/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -
+KGA: Muzio gambit, From defense
+rnb1kbnr/ppppqp1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -
+KGA: Muzio gambit, Kling and Horwitz counter-attack
+rnb1kbnr/ppppqppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Gunderam defense
+rnb1kbnr/ppppqppp/8/4p3/4PP2/6P1/PPPP3P/RNBQKBNR w KQkq -
+KGD: Keene's defense
+rnb1kbnr/ppppqppp/8/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Chigorin variation *
+rnb1kbnr/ppppqppp/8/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -
+Danish gambit: Collijn defense
+rnb1kbnr/ppq1pppp/8/2p1N3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Fajarowicz, Steiner variation *
+rnb1kbnr/ppq1pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+Queen's pawn: Mengarini attack *
+rnb1kbnr/ppqppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Quinteros variation
+rnb1qrk1/pp2b1pp/2p1pn2/3p1pB1/2PP4/2N2NP1/PPQ1PPBP/R4RK1 b - -
+Dutch: stonewall: Chekhover variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b - -
+Dutch: Ilyin-Genevsky variation with b3
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Ilyin-Genevsky variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQR1K1 b - -
+Dutch: Ilyin-Genevsky, Winter variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PPQ1PPBP/R1B2RK1 b - -
+Dutch: Ilyin-Genevsky variation with Qc2
+rnb1r1k1/ppp2ppp/1b6/3qp3/1PP5/P2P1N2/4BPPP/R1BQK2R b KQ -
+Ruy Lopez: Noah's ark trap *
+rnb2bnr/pppp1k1p/5q2/8/4Pp2/2N1BQ2/PPP3PP/R4RK1 b - -
+KGA: Lolli gambit, Young variation
+rnb2knr/pppp2pp/5q2/2b1pP1Q/6P1/8/PPPP1P1P/RNB1KBNR w KQ -
+KGA: bishop's gambit, classical defense, Cozio attack *
+rnb2rk1/p1p1qppp/1p3n2/8/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Pillsbury variation *
+rnb2rk1/p1pqppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQ1RK1 w - -
+Gr\"unfeld: exchange, Larsen variation
+rnb2rk1/p1q1ppbp/1p3np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Qc2 & b3 *
+rnb2rk1/p4ppp/1qp2n2/2bPp3/B7/2NP4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Waller attack *
+rnb2rk1/pp2ppbp/2pp1np1/q7/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Kavalek (Bronstein) variation
+rnb2rk1/pp2qppp/1b2pn2/3p4/1PP5/P3PN2/1B3PPP/RN1QKB1R b KQ -
+QGA: classical, 8...Bb7 *
+rnb2rk1/pp2qppp/1b3n2/2p1N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R w KQ -
+Ruy Lopez: open, Howell attack, Adam variation *
+rnb2rk1/pp2qppp/4pn2/2bp4/1PP5/P3PN2/5PPP/RNBQKB1R b KQ -
+QGA: classical, 7...b5 *
+rnb2rk1/pp2qppp/4pn2/2bp4/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, 7.Qe2 *
+rnb2rk1/pp2qppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Smyslov variation
+rnb2rk1/pp2qppp/5n2/2b5/1PB1p3/P1N1PN2/5PPP/R1BQK2R w KQ -
+QGA: classical, Furman variation *
+rnb2rk1/pp2qppp/5n2/2p5/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Zukertort variation *
+rnb2rk1/pp3ppp/1bpq1n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R w KQ -
+Ruy Lopez: open, Motzko attack *
+rnb2rk1/pp3ppp/1bpq1n2/4N3/1PBPp3/P3B3/2P1NPPP/R2QK2R b KQ -
+Ruy Lopez: open, Motzko attack, Nenarokov variation *
+rnb2rk1/ppB1ppbp/6p1/3q4/3P4/4P3/PP3PPP/R2QKBNR b KQ -
+Gr\"unfeld: Gr\"unfeld gambit accepted
+rnb2rk1/ppp1qpp1/4p2p/3P4/3P4/2P1PN2/P4PPP/R2QKB1R b KQ -
+QGD: Lasker defense, main line
+rnb2rk1/ppp1qpp1/4p2p/3p4/2PPn3/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Lasker defense, Teichmann variation
+rnb2rk1/ppp1qppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Howell attack *
+rnb2rk1/ppp1qppp/5n2/3pN3/1b1PP3/2N5/PPP1BPPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Trifunovi\'c variation *
+rnb2rk1/ppp1qppp/5n2/8/4pN2/2P5/P1PPBPPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Cordel variation *
+rnb2rk1/ppp1qppp/8/3n4/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Winawer attack *
+rnb2rk1/ppp2pbp/3p2p1/3Pp3/2n1P2Q/2N2P2/PP2K2P/R5NR w - -
+King's Indian: S\"amisch, orthodox, Bronstein variation
+rnb2rk1/ppp2pp1/3q3p/3p4/3P4/1QP1PN2/P4PPP/R3KB1R w KQ -
+QGD: Lasker defense, Bernstein variation
+rnb2rk1/pppp2pp/5q2/2b1pP2/8/2N5/PPPP1P1P/R1BQKBNR b KQ -
+KGA: Muzio gambit, Holloway defense *
+rnb2rk1/pppp2pp/5q2/2b1pP2/8/8/PPPPQP1P/RNB1KBNR b KQ -
+KGA: Muzio gambit, From defense *
+rnb2rk1/pppp2pp/5q2/5P2/4Q3/8/PPPP1b1P/RNB1KBNR w KQ -
+KGA: double Muzio gambit *
+rnb2rk1/ppppqppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: Worrall attack, sharp line *
+rnb2rk1/ppppqppp/1b3n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQK2R b KQ -
+Ruy Lopez: Worrall attack, solid line *
+rnb2rk1/ppppqppp/5n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Tartakower variation *
+rnb2rk1/ppppqppp/5n2/b3p3/4P3/P1N2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Worrall attack *
+rnb2rk1/ppq1ppbp/5np1/2pp4/3P4/4PN2/PPPNBPPP/R1BQ1RK1 w - -
+Catalan: closed, 7.Qc2 *
+rnbk1b1r/pppnqBpp/8/4Np2/3Q4/8/PPP2PPP/RNB1K2R w KQ -
+KGD: Falkbeer, Alapin variation *
+rnbk1bnr/pppp2pp/8/8/2B1pp1q/2N5/PPPPQ1PP/R1BK2NR w - -
+KGA: L\'opez-Gianutio counter-gambit, Hein variation
+rnbq1bnr/ppp3k1/7p/3B4/3PPppP/8/PPP3P1/RNBQK2R b KQ -
+KGA: Allgaier, Urusov attack
+rnbq1bnr/ppp3k1/7p/4B3/2BPp1pP/8/PPP3P1/RN1QK2R b KQ -
+KGA: Allgaier, Cook variation
+rnbq1bnr/pppp1k2/7p/8/2B1PppP/8/PPPP2P1/RNBQK2R b KQ -
+KGA: Allgaier, Walker attack
+rnbq1bnr/pppp1k2/7p/8/3PPppP/8/PPP3P1/RNBQKB1R b KQ -
+KGA: Allgaier, Thorold variation
+rnbq1bnr/pppp1k2/7p/8/4PppP/2N5/PPPP2P1/R1BQKB1R b KQ -
+KGA: Allgaier, Blackburne gambit
+rnbq1bnr/pppp1kpp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQ -
+KGA: Tumbleweed gambit *
+rnbq1bnr/pppppkpp/5p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQ -
+Fried fox defense
+rnbq1bnr/pppppkpp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQ -
+Hammerschlag (Fried fox/Pork chop opening) *
+rnbq1k1r/pp3ppp/5n2/1Bbpp3/8/2N2N2/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Cracow variation *
+rnbq1k1r/ppp2Bpp/8/4N2Q/1b1Pp3/2n5/PPP2PPP/R1B1K2R b KQ -
+Two knights defense, Keidanz variation *
+rnbq1k1r/ppp2pp1/4p2p/3pP3/3Pn1Q1/2P5/P1P2PPP/R1B1KBNR b KQ -
+French: MacCutcheon, Duras variation
+rnbq1k1r/ppp3pp/5P2/2bpp1PQ/4n3/7N/PPPP1P1P/RNB1KB1R b KQ -
+KGA: Silberschmidt gambit *
+rnbq1k1r/ppp3pp/8/2bppPPQ/4n3/3P3N/PPP2P1P/RNB1KB1R b KQ -
+KGA: Salvio gambit, Anderssen counter-attack *
+rnbq1k1r/pppp2pp/5P2/2b1p1PQ/4n3/8/PPPP1P1P/RNB1KBNR b KQ -
+KGA: Cochrane gambit *
+rnbq1k1r/pppp2pp/8/2b1pPPQ/4n3/2N5/PPPP1P1P/R1B1KBNR b KQ -
+KGA: Herzfeld gambit *
+rnbq1knr/pppp2pp/8/2b1pP1Q/1P6/8/P1PP1PPP/RNB1KBNR b KQ -
+KGA: bishop's gambit, Bryan counter-gambit *
+rnbq1knr/pppp2pp/8/2b1pP1Q/2B5/8/PPPP1PPP/RNB1K1NR b KQ -
+KGA: bishop's gambit, Greco variation *
+rnbq1knr/pppp2pp/8/2b1pP1Q/6P1/8/PPPP1P1P/RNB1KBNR b KQ -
+KGA: bishop's gambit, classical defense *
+rnbq1knr/pppp2pp/8/2b1pP1Q/8/2N5/PPPP1PPP/R1B1KBNR b KQ -
+KGA: bishop's gambit, Boden defense *
+rnbq1knr/pppp2pp/8/4pP1Q/3b4/3B4/PPP2PPP/RNB1K1NR b KQ -
+KGA: bishop's gambit, Bor\'en-Svenonius variation *
+rnbq1knr/pppp3p/6p1/4pP1Q/3b2P1/8/PPP2P1P/RNB1KBNR w KQ -
+KGA: bishop's gambit, Chigorin's attack (Gifford variation) *
+rnbq1r1k/p1p4P/5n2/2bpp2B/8/8/PPPP1PPP/RNBQK1NR w KQ -
+Bishop's opening: Four pawns' gambit *
+rnbq1r1k/pppp3P/5n2/2b1p2B/8/8/PPPP1PPP/RNBQK1NR w KQ -
+KGA: Cunningham, three pawns gambit *
+rnbq1rk1/1p2ppbp/p1pp1np1/8/2PPP3/2NBBP2/PP4PP/R2QK1NR w KQ -
+King's Indian: S\"amisch, Byrne variation
+rnbq1rk1/1p3pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 b - -
+Benoni: classical, 9...a6, 10.a4
+rnbq1rk1/1p3ppp/4pn2/p1bp4/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, Rubinstein variation *
+rnbq1rk1/1pp1ppbp/p4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Alekhine (Hungarian) variation
+rnbq1rk1/1pp2pbp/3p1np1/p2Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Petrosian system, Stein variation
+rnbq1rk1/1pp2ppp/1b3n2/p2NN3/1P1PP3/P7/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Schlechter defense *
+rnbq1rk1/1ppp1ppp/1b3n2/p3p3/1P2P3/P1N2N2/2PPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Wing attack *
+rnbq1rk1/2p1bppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, Breyer, 10.d4
+rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Breyer defense
+rnbq1rk1/p1p1bpp1/1p2p2p/3n4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5
+rnbq1rk1/p1p1bpp1/1p2pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Tartakower (Makagonov-Bondarevsky) system
+rnbq1rk1/p1p1ppbp/1p1p1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, double fianchetto variation
+rnbq1rk1/p1p1ppbp/1p3np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Levenfish variation
+rnbq1rk1/p1p1ppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Simagin's lesser variation
+rnbq1rk1/p1p2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -
+Nimzo-Indian: 4.e3, main line with ...b6
+rnbq1rk1/p1pp1ppp/4pn2/1p6/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ -
+Nimzo-Indian: classical, Adorjan gambit
+rnbq1rk1/p1pp1ppp/5n2/1p1Np3/1bB1P3/8/PPPP1PPP/R1BQK1NR w KQ -
+Ruy Lopez: classical defense, Zaitsev variation *
+rnbq1rk1/p2p1ppp/2p2n2/2b1p3/B3P3/2N5/PPPP1PPP/R1BQK1NR w KQ -
+Evans gambit *
+rnbq1rk1/p2p1ppp/2p2n2/2b1p3/B3P3/2NP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit *
+rnbq1rk1/p3ppbp/1p3np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 w - -
+Dutch: stonewall, Botwinnik variation *
+rnbq1rk1/p3ppbp/1p3np1/2pp4/8/1P2PN2/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: Euwe variation *
+rnbq1rk1/p4ppp/1p2pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Keres variation
+rnbq1rk1/p4ppp/2P2n2/2b1p3/B7/2N5/PPPP1PPP/R1BQK1NR b KQ -
+Evans gambit: compromised defense *
+rnbq1rk1/p4ppp/2p2n2/2bpp1B1/B3P3/2NP4/PPP2PPP/R2QK1NR b KQ -
+Evans gambit: Alapin-Steinitz variation *
+rnbq1rk1/p4ppp/2p2n2/2bpp3/4P3/1BNP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit: Lasker defense *
+rnbq1rk1/p4ppp/2p2n2/2bpp3/B3P3/2NP4/PPPB1PPP/R2QK1NR b KQ -
+Evans gambit: Sanders-Alapin variation *
+rnbq1rk1/p4ppp/2p5/2bpp3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -
+Evans gambit: Richardson attack *
+rnbq1rk1/p4ppp/5n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit: normal variation *
+rnbq1rk1/pp1p1ppp/2p2n2/b7/4PB2/P1NP4/1PP3PP/R2QKBNR w KQ -
+Ruy Lopez: Siesta, Kopayev variation *
+rnbq1rk1/pp1p1ppp/4pn2/2P5/1bP5/2N5/PPQ1PPPP/R1B1KBNR w KQ -
+Nimzo-Indian: classical, Pir\'c variation
+rnbq1rk1/pp1pppbp/5np1/2p5/3P4/4PN2/PPP1BPPP/RNBQK2R w KQ -
+English: Neo-Catalan declined *
+rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: stonewall with Nc3
+rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/BP3NP1/P3PPBP/RN1Q1RK1 b - -
+Dutch: stonewall with Ba3
+rnbq1rk1/pp2p1bp/2pp1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Leningrad, main variation with c6
+rnbq1rk1/pp2ppbp/2p2np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O c6
+rnbq1rk1/pp2ppbp/2p2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Szabo (Boleslavsky) variation
+rnbq1rk1/pp2ppbp/3p1np1/2p3B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -
+King's Indian: Averbakh, 6...c5
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Yugoslav, 7.O-O
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto, Yugoslav system
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPPP2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack, with Be2 and Nf3
+rnbq1rk1/pp2ppbp/3p1np1/2pP4/2P1PP2/2N2N2/PP4PP/R1BQKB1R b KQ -
+King's Indian: Four pawns attack, dynamic line
+rnbq1rk1/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQ -
+Sicilian: dragon, Yugoslav attack, 7...O-O
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 b - -
+Dutch: stonewall variation *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/2P2NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O c6 *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/4PN2/PPPNBPPP/R1BQ1RK1 b - -
+Catalan: closed, 6...Nbd7 *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O *
+rnbq1rk1/pp2ppbp/5np1/2pp4/5P2/3PPN2/PPP1B1PP/RNBQ1RK1 b - -
+Dutch: classical variation *
+rnbq1rk1/pp2ppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R w KQ -
+Queen's Indian: old main line, 6.O-O *
+rnbq1rk1/pp2ppbp/5np1/2ppN3/5P2/4P3/PPPPB1PP/RNBQ1RK1 b - -
+Dutch defense, Alekhine variation *
+rnbq1rk1/pp2ppbp/5np1/3p4/3N4/6P1/PPP1PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O *
+rnbq1rk1/pp2ppbp/5np1/3p4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O, main line *
+rnbq1rk1/pp2ppbp/5np1/3p4/3P4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O, main line
+rnbq1rk1/pp2ppbp/5np1/3p4/8/1N4P1/PPP1PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O Nb6 *
+rnbq1rk1/pp2ppbp/5np1/8/2pN4/6P1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.dc *
+rnbq1rk1/pp2ppbp/6p1/2Pn4/8/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.dc
+rnbq1rk1/pp2ppbp/6p1/2p5/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Spassky variation
+rnbq1rk1/pp2ppbp/6p1/2pn4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3
+rnbq1rk1/pp3pbp/2pp1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, orthodox, 7.d5 c6
+rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, orthodox, 7.Nge2 c6
+rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, Donner variation
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+Benoni: classical, 9.O-O
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+Benoni: classical without 9.O-O
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP4PP/R1BQKB1R w KQ -
+Benoni: four pawns attack
+rnbq1rk1/pp3pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+Benoni: fianchetto variation
+rnbq1rk1/pp3pbp/3p1np1/2ppP3/2P2P2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack, Florentine gambit
+rnbq1rk1/pp3pbp/3p1np1/3pp3/2P1P3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, orthodox main line
+rnbq1rk1/pp3pbp/3ppnp1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR w KQ -
+King's Indian: Averbakh, main line
+rnbq1rk1/pp3pbp/3ppnp1/2pP4/2P1PP2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack
+rnbq1rk1/pp3ppp/1b3n2/2ppN3/1P1PP3/P1N5/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Harksen gambit *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R b KQ -
+Ruy Lopez: open, classical defense *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, 9.c3 *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R b KQ -
+Ruy Lopez: open, Italian variation *
+rnbq1rk1/pp3ppp/1bp2n2/8/1PNPp3/P1N1B3/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: open, Berlin variation *
+rnbq1rk1/pp3ppp/2p2n2/2bP2N1/2B1p3/2N5/PPPP1PPP/R1BQK2R w KQ -
+two knights: Max Lange attack, Krause variation *
+rnbq1rk1/pp3ppp/2p2n2/2bPp1B1/2B5/2NP4/PPP2PPP/R2QK1NR b KQ -
+Scotch gambit: Anderssen (Paulsen, Suhle) counter-attack *
+rnbq1rk1/pp3ppp/2p2n2/3pp3/1b2P3/1BN2N2/PPPP1PPP/R1BQ1RK1 b - -
+Ruy Lopez: classical defense, Benelux variation *
+rnbq1rk1/pp3ppp/2p2n2/3pp3/2P5/2NP1N2/PP1QPPPP/R3KB1R w KQ -
+Sicilian: Canal-Sokolsky attack, Bronstein gambit *
+rnbq1rk1/pp3ppp/2p2n2/b2PN3/4p3/P1N5/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, Basque gambit (North Spanish variation) *
+rnbq1rk1/pp3ppp/3b1n2/2ppN1B1/3P4/3B4/PPP2PPP/RN1Q1RK1 b - -
+Petrov: classical attack, Tarrasch variation *
+rnbq1rk1/pp3ppp/3b1n2/2ppN3/3P4/2N5/PPP1BPPP/R1BQK2R w KQ -
+Petrov: classical attack, Jaenisch variation *
+rnbq1rk1/pp3ppp/3b4/2pnp3/8/P2PPNP1/1P3P1P/RNBQKB1R b KQ -
+Sicilian: Kan, Gipslis variation *
+rnbq1rk1/pp3ppp/3b4/2ppN3/3PB3/8/PPP2PPP/RNBQ1RK1 b - -
+Petrov: modern attack, Trifunovi\'c variation *
+rnbq1rk1/pp3ppp/4p3/1B6/3PP3/5N2/P2Q1PPP/R3K2R b KQ -
+QGD: Semi-Tarrasch, Kmoch variation
+rnbq1rk1/pp3ppp/4p3/2pn4/3P4/P1P1PP2/6PP/R1BQKBNR w KQ -
+Nimzo-Indian: S\"amisch, Botvinnik variation
+rnbq1rk1/pp3ppp/4pn2/2bP4/8/4PN2/PP3PPP/RNBQKB1R b KQ -
+QGA: classical, Steinitz variation *
+rnbq1rk1/pp3ppp/4pn2/2bp4/2P5/4PN2/PP3PPP/RNBQKB1R w KQ -
+QGA: classical variation, 6.O-O *
+rnbq1rk1/pp3ppp/4pn2/2bp4/2P5/P3PN2/1P3PPP/RNBQKB1R b KQ -
+QGA: classical, 6...a6 *
+rnbq1rk1/pp3ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...dc
+rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -
+Nimzo-Indian: 4.e3, main line with ...c5
+rnbq1rk1/pp3ppp/5n2/2bpp3/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, Geller variation *
+rnbq1rk1/pp4pp/2p5/2bppp2/3PP1n1/2P4N/PP1NBPPP/R1BQ1RK1 b - -
+Philidor: Hanham, Berger variation *
+rnbq1rk1/ppp1b1pp/3ppn2/5p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch: classical variation
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -
+Dutch: stonewall, Botwinnik variation
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Dutch: stonewall with Nc3
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch: stonewall variation
+rnbq1rk1/ppp1bpp1/4p2p/3p4/2PPn2B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Lasker defense
+rnbq1rk1/ppp1bpp1/4pB1p/3p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: Neo-orthodox variation, 7.Bxf6
+rnbq1rk1/ppp1bpp1/4pn1p/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Neo-orthodox variation
+rnbq1rk1/ppp1bpp1/4pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: Neo-orthodox variation, 7.Bh4
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/2RQKBNR b K -
+QGD: Anti-neo-orthodox variation
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQ -
+QGD: 4.Bg5 Be7, 5.e3 O-O
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: 6.Nf3
+rnbq1rk1/ppp1bppp/8/3p4/3Pn3/3B1N2/PPP2PPP/RNBQ1RK1 w - -
+Petrov: classical attack, Mason variation
+rnbq1rk1/ppp1ppbp/1n4p1/8/3P4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O Nb6
+rnbq1rk1/ppp1ppbp/3p1np1/4P3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQ -
+Pirc: Austrian attack, 6.e5
+rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQ -
+King's Indian: Zinnowitz variation
+rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR b KQ -
+King's Indian: Averbakh system
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1B3/PP2BPPP/R2QK1NR b KQ -
+King's Indian: Semi-Averbakh system
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1BN2/PP3PPP/R2QKB1R b KQ -
+King's Indian: Larsen variation
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: 6.Be2
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR w KQ -
+King's Indian: S\"amisch, 5...O-O
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP2B1PP/R1BQK1NR b KQ -
+King's Indian: Four pawns attack, 6.Be2
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PP3/6P1/PPP1NPBP/RNBQK2R b KQ -
+R\'eti: King's Indian attack, Pachman system *
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N1BN2/PPP3PP/R2QKB1R b KQ -
+Pirc: Austrian attack, 6.Be3
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQ -
+Pirc: Austrian attack
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2NB1N2/PPP3PP/R1BQK2R b KQ -
+Pirc: Austrian attack, 6.Bd3
+rnbq1rk1/ppp1ppbp/5np1/3p4/1PPP4/2N1PN2/P4PPP/R1BQKB1R b KQ -
+Gr\"unfeld: Makogonov variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/2RQKBNR b K -
+Gr\"unfeld: Gr\"unfeld gambit, Capablanca variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/R2QKBNR w KQ -
+Gr\"unfeld: Gr\"unfeld gambit
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R b KQ -
+Gr\"unfeld with Bf4 & e3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R b KQ -
+Gr\"unfeld with e3 & Qb3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP1B1PPP/R2QKB1R b KQ -
+Gr\"unfeld: Opo\v censky variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQ -
+Gr\"unfeld with e3 & Bd3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O
+rnbq1rk1/ppp1ppbp/5np1/3p4/5P2/2P3PN/PP1PP1BP/RNBQK2R b KQ -
+Dutch: Leningrad, Basman system *
+rnbq1rk1/ppp1ppbp/5np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R b KQ -
+Gr\"unfeld: Russian variation with e4
+rnbq1rk1/ppp1ppbp/6p1/3n4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O
+rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR b KQ -
+King's Indian: S\"amisch, orthodox, 7.d5
+rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: Petrosian system
+rnbq1rk1/ppp2pbp/3p1np1/4P3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: Andersson variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BN2/PP2BPPP/R2QK2R b KQ -
+King's Indian: Gligori\'c-Taimanov system
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, orthodox variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+King's Indian: orthodox variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: classical variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N3P1/PP2NPBP/R1BQK2R b KQ -
+King's Indian: Pomar system
+rnbq1rk1/ppp2pbp/4pnp1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Botvinnik variation
+rnbq1rk1/ppp2ppp/1b3n2/3pN3/1P2P3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 7.Bb3 *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: open, 8...Be6 *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P1N5/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 8.de *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P7/2P1NPPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Zukertort variation *
+rnbq1rk1/ppp2ppp/3b1n2/3pN3/3P4/8/PPP1BPPP/RNBQ1RK1 b - -
+Petrov: classical attack, Mason variation *
+rnbq1rk1/ppp2ppp/3bpn2/3p4/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQ -
+Nimzo-Indian: Simagin variation
+rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5
+rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2NBP3/PP3PPP/R1BQK1NR w KQ -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5
+rnbq1rk1/ppp2ppp/4pn2/3p4/2PP4/P1PBP3/5PPP/R1BQK1NR b KQ -
+Nimzo-Indian: 4.e3, Botvinnik system
+rnbq1rk1/ppp2ppp/5P2/2b4Q/2pp4/2P5/PP3PPP/RNB1K1NR w KQ -
+Bishop's opening: Pratt variation
+rnbq1rk1/ppp2ppp/5n2/2b1p3/4p3/2PP4/PP1NBPPP/R1BQK1NR w KQ -
+Philidor: Hanham, Steiner variation *
+rnbq1rk1/ppp2ppp/5n2/2bP2N1/2B1p3/2N5/PPPP1PPP/R1BQK2R b KQ -
+two knights: Max Lange attack, Steinitz variation *
+rnbq1rk1/ppp2ppp/5n2/2bP4/2B1p3/2N2N2/PPPP1PPP/R1BQK2R w KQ -
+two knights: Max Lange attack *
+rnbq1rk1/ppp2ppp/5n2/2bPN3/8/2N5/PPPP1PPP/R1BQKB1R b KQ -
+Two knights defense *
+rnbq1rk1/ppp2ppp/5n2/2bPp3/8/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Two knights defense *
+rnbq1rk1/ppp2ppp/5n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQ -
+Philidor: Hanham, Krause variation *
+rnbq1rk1/ppp2ppp/5n2/3Pp3/1b6/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: Berlin defense, Nyholm attack *
+rnbq1rk1/ppp2ppp/5n2/3pN3/1b2P3/2N5/PPPPBPPP/R1BQK2R b KQ -
+Ruy Lopez: open Berlin defense, 5...Be7 *
+rnbq1rk1/ppp2ppp/5n2/3pN3/1b2P3/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, Rosenthal variation *
+rnbq1rk1/ppp2ppp/5n2/3pN3/4P3/P1PP4/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred, Rubinstein variation *
+rnbq1rk1/ppp2ppp/5n2/3pp1B1/4P3/P1PP1N2/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred, Lipnitsky variation *
+rnbq1rk1/ppp2ppp/5n2/3pp3/1b2P3/2NP4/PPPN1PPP/R1BQKB1R b KQ -
+Ruy Lopez: closed Berlin defense, Chigorin variation *
+rnbq1rk1/ppp2ppp/5n2/4N3/1b2p3/2N5/PPPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Minckwitz variation *
+rnbq1rk1/ppp2ppp/5n2/8/1b2p3/2NN4/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open Berlin defense, l'Hermet variation *
+rnbq1rk1/ppp2ppp/5n2/b2PN3/8/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Riga variation *
+rnbq1rk1/ppp2ppp/5n2/b2p4/4P3/2NN4/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open Berlin defense, Showalter variation *
+rnbq1rk1/ppp2ppp/5n2/b2pN3/1P2P3/P1N5/2PP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, 6.d4 b5 *
+rnbq1rk1/ppp2ppp/5n2/b2pN3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 6.d4 *
+rnbq1rk1/ppp2ppp/5n2/b2pp3/4P3/P1N2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, center attack *
+rnbq1rk1/ppp2ppp/5n2/b3N3/1P1pP3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Richter variation *
+rnbq1rk1/ppp2ppp/8/2b1p3/8/2P1NN2/PP1P1nPP/R1BQKB1R w KQ -
+Scotch: Cochrane variation *
+rnbq1rk1/ppp2ppp/8/3pb3/2PPn3/3B4/PP3PPP/RNBQ1RK1 w - -
+Petrov: modern attack, Trifunovi\'c variation
+rnbq1rk1/ppp2ppp/8/b2pN3/1P2n3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Friess attack *
+rnbq1rk1/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQ -
+French: Albin-Alekhine-Ch\^atard attack, Spielmann variation
+rnbq1rk1/pppp1pp1/5n1p/4p1B1/4P2P/P1P5/1PP2PP1/R2QKBNR b KQ -
+Ruy Lopez: exchange variation, Alapin gambit *
+rnbq1rk1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/1BPP1PPP/R2QKB1R b KQ -
+Ruy Lopez: Archangelsk (counterthrust) variation *
+rnbq1rk1/pppp1ppp/1b3n2/4p3/1P2P3/P1NP1N2/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: ...b5 & ...d6 *
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQ -
+Nimzo-Indian: Reshevsky variation
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQ -
+Nimzo-Indian: 4.e3 O-O
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1PN2/PP3PPP/R1BQKB1R b KQ -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2NBP3/PP3PPP/R1BQK1NR b KQ -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3
+rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P1P3/5PPP/R1BQKBNR b KQ -
+Nimzo-Indian: S\"amisch variation
+rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR w KQ -
+Nimzo-Indian: S\"amisch variation
+rnbq1rk1/pppp1ppp/5n2/4N3/1b2P3/2N5/PPPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, open variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: Berlin defense, 4.O-O *
+rnbq1rk1/pppp1ppp/5n2/4p3/1b2P3/2NP1N2/PPP2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, 4.O-O, d6 *
+rnbq1rk1/pppp1ppp/5n2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Beverwijk variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1P2P2/1PP3PP/R1BQKBNR b KQ -
+Ruy Lopez: exchange, Gligori\'c variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1P5/1PP2PPP/R1BQKBNR w KQ -
+Ruy Lopez: exchange variation, 5.O-O *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1PQ4/1PP2PPP/R1B1KBNR b KQ -
+Ruy Lopez: exchange, Bronstein variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1b2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Exchange variation doubly deferred (DERLD) *
+rnbq1rk1/pppp1ppp/5n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open (Tarrasch) defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/2B1P3/P1N2N2/1PPP1PPP/R1BQK2R b KQ -
+Ruy Lopez: M\"oller defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: 5.O-O *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPPBPPP/R1BQK2R b KQ -
+Ruy Lopez: closed defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred (Russian defense) *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQ -
+Ruy Lopez: modern Steinitz defense, 5.O-O *
+rnbq1rk1/pppp1ppp/8/3Pp3/1b6/8/PPPPNPPP/R1BQKB1R b KQ -
+Ruy Lopez: Bird's defense, Paulsen variation *
+rnbq1rk1/pppp2p1/8/2b2PPp/3pn3/3B1N2/PPP2P1P/RNBQK2R w KQ -
+KGA: Kieseritsky, Rice gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1PBP/RNBQK1NR w KQ -
+KGA: Hanstein gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/3P4/8/PPP2P1P/RNBQKBNR b KQ -
+KGA: Muzio gambit, Brentano defense *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/8/8/PPPP1P1P/RNBQKBNR w KQ -
+KGA: Muzio gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/8/8/PPPPQP1P/RNB1KBNR b KQ -
+KGA: Muzio gambit, Kling and Horwitz counter-attack *
+rnbq1rk1/ppppb1pp/4p3/5p2/2PPn3/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch defense, Alekhine variation
+rnbq1rk1/ppppb1pp/4pn2/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R w KQ -
+Dutch defense
+rnbq1rk1/ppppppbp/5np1/6B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQ -
+R\'eti: King's Indian attack, Yugoslav variation *
+rnbq2k1/pp1p1ppp/1bp5/8/1P1Nr3/P1P5/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall counter-attack, 11...c6 *
+rnbq2k1/pp3ppp/1bp5/3p4/1P1Nr3/P1P5/4BPPP/R1BQ1RK1 w - -
+Ruy Lopez: Marshall, main line, 12.d2d4 *
+rnbq2k1/pp3ppp/1bp5/4r3/1P1Pp3/P1N1P3/2PQB1PP/R4RK1 w - -
+Ruy Lopez: open, Tarrasch trap *
+rnbq2k1/pp3ppp/2p1r3/3p4/1P1P4/P2B4/5PPP/R1BQ1RK1 w - -
+Ruy Lopez: Marshall, Kevitz variation *
+rnbq2k1/pppp1ppp/1b6/3N4/1PBpr1n1/P4N2/2P2PPP/R1BQ1K1R b - -
+Ruy Lopez: Rabinovich variation *
+rnbq3r/pp4pp/2P2nk1/8/2Bbp3/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Ghulam Kassim variation *
+rnbq3r/pppp1k2/3b1n1p/8/4PQ1P/8/PPPP2P1/RNB1KB1R w KQ -
+KGA: Allgaier, Horny defense
+rnbqk1n1/pppp1p1r/7b/4N2p/2BPPppP/2N5/PPP3P1/R1BQK2R b KQq -
+KGA: Kieseritsky, long whip defense, Jaenisch variation
+rnbqk1nb/pp3p2/2pp4/4N1p1/2BPPp2/2N5/PPP3P1/R1BQK3 b Qkq -
+KGA: Greco gambit
+rnbqk1nr/1p1p1ppp/p3p3/2b5/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -
+Sicilian: Kan, Polugaievsky variation
+rnbqk1nr/5ppp/2p1p3/pp6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Abrahams variation
+rnbqk1nr/p1p1bppp/1p2p3/3pP3/3P4/2N1B3/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Frankfurt variation
+rnbqk1nr/p1pp1ppp/8/1pb1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Wing gambit *
+rnbqk1nr/p1pp2pp/8/1Bb1pp2/4P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: MacDonnell double gambit *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2B1P1Q1/8/PPPP1PPP/RNB1K1NR b KQkq -
+Bishop's opening: del Rio variation *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Philidor variation *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Lewis counter-gambit *
+rnbqk1nr/pp1pp2p/6p1/2pP1p2/2P5/2P5/P3PPPP/R1BQKBNR w KQkq -
+Beefeater defense
+rnbqk1nr/pp1ppp1p/6pb/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq -
+Sicilian: Acton extension
+rnbqk1nr/pp1pppbp/8/2p3B1/3P4/8/PPP1PPPP/RN1QKBNR w KQkq -
+Grob: Fritz gambit *
+rnbqk1nr/pp1pppbp/8/2pP2B1/8/8/PPP1PPPP/RN1QKBNR b KQkq -
+Grob: Romford counter-gambit *
+rnbqk1nr/pp2bppp/2p5/3p4/3PpB2/2P1P3/PP3PPP/RN1QKBNR w KQkq -
+Caro-Kann: advance, Short variation *
+rnbqk1nr/pp2ppb1/2p3p1/3pP2p/3P1P2/2N5/PPP3PP/R1BQKBNR w KQkq -
+Robatsch defense: Gurgenidze variation
+rnbqk1nr/pp2ppbp/2pp2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Robatsch defense: two knights, Suttles variation
+rnbqk1nr/pp2ppbp/6p1/1Bpp4/5P2/4PN2/PPPP2PP/RNBQK2R b KQkq -
+Dutch defense: Dutch-Indian (Nimzo-Dutch) variation *
+rnbqk1nr/pp2ppbp/6p1/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: closed *
+rnbqk1nr/pp2ppbp/6p1/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq -
+King's Indian: 3.g3, counterthrust variation *
+rnbqk1nr/pp2ppbp/6p1/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Dutch defense *
+rnbqk1nr/pp2ppbp/6p1/2pp4/5P2/4PN2/PPPPB1PP/RNBQK2R b KQkq -
+Dutch defense *
+rnbqk1nr/pp2ppbp/6p1/3p4/3N4/6P1/PPP1PPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.cd *
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq -
+French: Winawer, advance, Russian variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer, advance variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPPB1PPP/R2QKBNR b KQkq -
+French: Winawer, advance, Bogolyubov variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/P1N5/1PP2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance, 5.a3
+rnbqk1nr/pp3ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance variation
+rnbqk1nr/pp3ppp/4p3/3pP3/1P6/2p2N2/1PP2PPP/R1BQKB1R b KQkq -
+French: Winawer, advance, Rauzer variation
+rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Philidor: Steinitz variation
+rnbqk1nr/ppp1bppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Charousek (Petrosian) variation
+rnbqk1nr/ppp1bppp/4p3/3pP1B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Vistaneckis (Nimzovich) variation
+rnbqk1nr/ppp1p1bp/3p2p1/5p2/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Modern defense: Averbakh system, Randspringer variation
+rnbqk1nr/ppp1ppbp/3p2p1/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Modern defense
+rnbqk1nr/ppp1ppbp/3p2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Modern defense: Averbakh system
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Robatsch defense: two knights variation
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Robatsch defense: Geller's system
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Robatsch defense: Pseudo-Austrian attack
+rnbqk1nr/ppp1ppbp/6p1/3p4/5P2/5NP1/PPPPP2P/RNBQKB1R b KQkq -
+Dutch defense *
+rnbqk1nr/ppp2p1p/3b4/6p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Bird: From gambit, Lasker variation
+rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/3Q1N2/PPP3P1/RNB1K2R b KQkq -
+KGA: Philidor gambit, Schultz variation
+rnbqk1nr/ppp2ppp/1b1p4/8/2P1p3/1N6/PP1PPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Kmoch variation *
+rnbqk1nr/ppp2ppp/3b4/3Pp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+QP counter-gambit: Maroczy gambit
+rnbqk1nr/ppp2ppp/3b4/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Schlechter variation *
+rnbqk1nr/ppp2ppp/3bp3/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn: stonewall attack *
+rnbqk1nr/ppp2ppp/3p4/2b1P3/4P3/5N2/PPPP2PP/RNBQKB1R b KQkq -
+KGD: classical, Soldatenkov variation
+rnbqk1nr/ppp2ppp/3p4/2b1p3/1P2PP2/5N2/P1PP2PP/RNBQKB1R b KQkq -
+KGD: classical, Heath variation
+rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/2P2N2/PP1P2PP/RNBQKB1R b KQkq -
+KGD: classical, 4.c3
+rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+Bishop's opening: Calabrese counter-gambit, Jaenisch variation *
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP1NPPP/R1BQKB1R b KQkq -
+French: Winawer, Alekhine (Mar\'oczy) gambit
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer (Nimzovich) variation
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPPB1PPP/R2QKBNR b KQkq -
+French: Winawer, fingerslip variation
+rnbqk1nr/ppp2ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance variation
+rnbqk1nr/ppp2ppp/4p3/8/3Pp3/P1b5/1PP1NPPP/R1BQKB1R w KQkq -
+French: Winawer, Alekhine gambit
+rnbqk1nr/ppp2ppp/8/2bp4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Balogh variation *
+rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Lewis counter-gambit
+rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Lewis gambit *
+rnbqk1nr/ppp2ppp/8/2bpp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening: Ponziani gambit *
+rnbqk1nr/ppp2ppp/8/4P3/1bP5/4p3/PP1B1PPP/RN1QKBNR w KQkq -
+QGD: Albin counter-gambit, Lasker trap
+rnbqk1nr/ppp3pp/3p4/2b1pp2/4PP2/2P2N2/PP1P2PP/RNBQKB1R w KQkq -
+KGD: classical counter-gambit
+rnbqk1nr/ppp3pp/4P3/2bp2N1/4p3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Philidor: Philidor counter-gambit, Berger variation
+rnbqk1nr/ppp3pp/8/2b2p2/2BpP3/2P2N2/PP4PP/RNBQK2R b KQkq -
+KGD: classical, R\'eti variation
+rnbqk1nr/pppp1pbp/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Paulsen defense
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp1P/5N2/PPPP2P1/RNBQK2R b KQkq -
+KGA: Philidor gambit
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQ1RK1 b kq -
+KGA: Hanstein gambit
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+King's knight's gambit
+rnbqk1nr/pppp1ppp/4p3/8/1bPP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Franco-Indian (Keres) defense
+rnbqk1nr/pppp1ppp/8/2b1p3/1PB1P3/8/P1PP1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Wing gambit
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/2P5/PP1P1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Philidor variation
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Classical variation *
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Classical variation
+rnbqk1nr/pppp1ppp/8/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Lewis gambit
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+Bishop's opening: Philidor counter-attack *
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Bishop's opening: Berlin defense *
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Bishop's opening *
+rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Bishop's opening: Calabrese counter-gambit *
+rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: classical variation
+rnbqk1nr/pppp1ppp/8/2b1p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: Hillbilly attack *
+rnbqk1nr/pppp1ppp/8/2b1p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Krejcik variation *
+rnbqk1nr/pppp1ppp/8/4p3/1bB1PP2/8/P1PP2PP/RNBQK1NR b KQkq -
+Bishop's opening: MacDonnell double gambit
+rnbqk1nr/pppp1ppp/8/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English, Kramnik-Shirov counterattack
+rnbqk1nr/pppp1ppp/8/8/2B1P2b/5N2/PPPP3p/RNBQ1R1K b kq -
+KGA: Cunningham, three pawns gambit
+rnbqk1nr/pppp1ppp/8/8/2B1Pp1b/5NP1/PPPP3P/RNBQK2R b KQkq -
+KGA: Cunningham, Bertin gambit
+rnbqk1nr/pppp1ppp/8/8/2BPP2b/5N2/P1P4p/RNBQ1R1K b kq -
+Bishop's opening: Four pawns' gambit
+rnbqk1nr/pppp2pp/3b4/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Schurig gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/1P6/8/P1PP1PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Bryan counter-gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Bledow variation *
+rnbqk1nr/pppp2pp/8/2b1pP2/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, L\'opez-Gianutio counter-gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+KGA: bishop's gambit, Maurian defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Ruy L\'opez defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Cozio (Morphy) defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: bishop's gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/8/PPPPNPPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Steinitz defense *
+rnbqk1nr/pppp2pp/8/2b1pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening: Greco gambit *
+rnbqk1nr/pppp2pp/8/4Pp2/1b1p4/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Nimzovich variation *
+rnbqk1nr/pppp2pp/8/4pP2/3b4/2P5/PP3PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Anderssen variation *
+rnbqk1nr/pppp2pp/8/4pP2/3b4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Morphy variation *
+rnbqk1nr/ppppb1pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit *
+rnbqk1nr/ppppbp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Polerio defense
+rnbqk1nr/ppppbppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Cunningham defense
+rnbqk1nr/ppppp1bp/6p1/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -
+Dutch: Leningrad, Karlsbad variation
+rnbqk1nr/ppppppbp/6p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Robatsch defense
+rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqk1nr/ppppppbp/6p1/8/3PPP2/8/PPP3PP/RNBQKBNR b KQkq -
+Robatsch defense: three pawns attack
+rnbqk1nr/ppppppbp/8/8/3P2p1/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Grob: spike attack *
+rnbqk1r1/ppp2pP1/4p3/3p4/1b1P2Qp/2N5/PPP2PP1/R3KBNR b KQq -
+French: MacCutcheon, Grigoriev variation
+rnbqk2r/1p2bp2/p2ppn1p/6p1/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf, G\"oteborg (Argentine) variation
+rnbqk2r/1p2bppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 7...Be7
+rnbqk2r/1pp2ppp/1b3n2/p2p4/4p3/1N1P2P1/PPP1PPBP/RNBQK2R w KQkq -
+Alekhine's defense: modern, Keres variation *
+rnbqk2r/1ppnbppp/p3p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Mar\'oczy variation
+rnbqk2r/2pp1ppp/5n2/ppb1p3/4P3/1BN5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, 5.a4 *
+rnbqk2r/p1p2ppp/1p1bpn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Queen's pawn game, Rubinstein (Colle-Zukertort) variation *
+rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: Fischer variation, 5.Ne2
+rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: Fischer variation
+rnbqk2r/p1pp1ppp/5n2/1Bb1p3/4P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p1pp1ppp/5n2/1pb1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined *
+rnbqk2r/p1pp1ppp/5n2/1pb1p3/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq -
+Evans counter-gambit *
+rnbqk2r/p1pp1ppp/8/2b1p3/Np2n1Q1/1B6/PPPP1PPP/R1B1K1NR b KQkq -
+Evans gambit declined, Hirschbach variation *
+rnbqk2r/p1pp1ppp/8/2b1p3/Np2n3/1B5N/PPPP1PPP/R1BQK2R b KQkq -
+Evans gambit declined, Lange variation *
+rnbqk2r/p2p1pp1/4pn1p/1ppP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -
+Nimzo-Indian: Leningrad, ...b5 gambit
+rnbqk2r/p2p1ppp/1p2pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: S\"amisch, O'Kelly variation
+rnbqk2r/p2p1ppp/2p2n2/1pb1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: Bird's attack *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Evans gambit: Mayet defense *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Evans gambit: 5...Be7 *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2NB4/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit: Stone-Ware variation *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/B3P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p4ppp/2p2n2/1Bb1p3/8/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit *
+rnbqk2r/p4ppp/2p2n2/2b5/B3p3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit: Cochrane variation *
+rnbqk2r/p4ppp/2p2n2/2bpp3/B3P3/2NP4/PPP2PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p4ppp/2p2n2/2bpp3/BP2P3/2N5/P1PP1PPP/R1BQK1NR b KQkq -
+Evans gambit: Leonhardt variation *
+rnbqk2r/p4ppp/2p2n2/2bpp3/N3P3/8/PPPPBPPP/R1BQK1NR b KQkq -
+Evans gambit: Cordel variation *
+rnbqk2r/pp1n1ppp/4p3/2bpP3/5PQ1/2N5/PPP3PP/R1B1KBNR b KQkq -
+French: Steinitz, Bradford attack
+rnbqk2r/pp1nbppp/4p3/2ppP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Breyer variation
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Piano *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Giuoco Piano *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N5/PPPPQPPP/R1B1K1NR b KQkq -
+Giuoco Piano: close variation *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/4P3/3P4/PPP1BPPP/RNBQK1NR w KQkq -
+Philidor: Steinitz variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1b2P3/1BN5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: classical defense, Charousek variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Ruy Lopez: classical defense, 4.c3 *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1P3/2N5/PPPPQPPP/R1B1K1NR b KQkq -
+Ruy Lopez: classical defense, Boden variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1PP2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+Ruy Lopez: Cordel gambit *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4P3/P1NP4/1PPB1PPP/R2QKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4PP2/P1NP4/1PP3PP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, siesta variation *
+rnbqk2r/pp1p1ppp/4p3/2pP4/1bP1n3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Nimzo-Indian: three knights, Euwe variation
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein, anti-H\"ubner system)
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: 4.e3 c5
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, 4...c5
+rnbqk2r/pp1p1ppp/4pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pp1p1ppp/4pn2/2pP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: three knights, Korchnoi variation
+rnbqk2r/pp1p1ppp/4pn2/4P3/1b1N4/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Pin, Koch variation
+rnbqk2r/pp1p1ppp/4pn2/8/1b1NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Pin variation (Sicilian counter-attack)
+rnbqk2r/pp1p1ppp/5n2/2p1p3/2P5/3P4/PP1QPPPP/RN2KBNR w KQkq -
+Sicilian: Canal-Sokolsky attack, Sokolsky variation *
+rnbqk2r/pp1p1ppp/5n2/4p3/1b1NP3/2NB4/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Pin, Jaffe variation
+rnbqk2r/pp1p1ppp/5n2/b1p1p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Duras (Keres) variation *
+rnbqk2r/pp1pp1bp/2p3pn/5p2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Dutch: Leningrad, Basman system
+rnbqk2r/pp1pppbp/5np1/2P5/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+English: Neo-Catalan accepted *
+rnbqk2r/pp1pppbp/5np1/2p5/1P6/P3PN2/2PP1PPP/RNBQKB1R b KQkq -
+English: Romanishin gambit *
+rnbqk2r/pp2npbp/6p1/3pp3/8/1N4P1/PPP1PPBP/RNBQK2R w KQkq -
+Neo-Gr\"unfeld, 5.cd, main line *
+rnbqk2r/pp2nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR b KQkq -
+French: Winawer, advance, poisoned pawn variation
+rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R b KQkq -
+French: Winawer, advance, positional main line
+rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq -
+French: Winawer, advance, 6...Ne7
+rnbqk2r/pp2nppp/4p3/2ppP3/P2P4/2P5/2P2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance, Smyslov variation
+rnbqk2r/pp2ppbp/3p1np1/2p5/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQkq -
+Pirc: Austrian attack, dragon formation
+rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: dragon, classical attack
+rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -
+Sicilian: dragon, Yugoslav attack
+rnbqk2r/pp2ppbp/5np1/1Bpp4/8/1P2PN2/PBPP1PPP/RN1QK2R b KQkq -
+Queen's Indian: Capablanca variation *
+rnbqk2r/pp2ppbp/5np1/2Pp4/8/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+Catalan: open, classical line *
+rnbqk2r/pp2ppbp/5np1/2Pp4/8/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: open, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/3P4/4PN2/PPP1BPPP/RNBQK2R w KQkq -
+Catalan: closed, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Neo-Gr\"unfeld, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/5P2/4PN2/PPPPB1PP/RNBQ1RK1 b kq -
+Dutch defense *
+rnbqk2r/pp2ppbp/5np1/2pp4/5P2/5NP1/PPPPP1BP/RNBQK2R w KQkq -
+Dutch: Leningrad, main variation *
+rnbqk2r/pp2ppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R b KQkq -
+Queen's Indian: 5.Bg2 Be7 *
+rnbqk2r/pp2ppbp/6p1/2p4n/2PP4/1P3N2/PB1P1PPP/RN1QKB1R w KQkq -
+Queen's Indian: Rubinstein variation *
+rnbqk2r/pp2ppbp/6p1/2p5/2PP2n1/1P3N2/PB1P1PPP/RN1QKB1R w KQkq -
+Queen's Indian: B\"urger variation *
+rnbqk2r/pp3pbp/3p1np1/1BpP4/4PP2/2N5/PP4PP/R1BQK1NR b KQkq -
+Benoni: Taimanov variation
+rnbqk2r/pp3pbp/3p1np1/2pP2B1/4P3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+Benoni: classical, 8.Bg5
+rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R b KQkq -
+Benoni: classical without 9.O-O
+rnbqk2r/pp3pbp/3p1np1/2pPP3/5P2/2N5/PP4PP/R1BQKBNR b KQkq -
+Benoni: Mikenas variation
+rnbqk2r/pp3pp1/3ppn1p/2pP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -
+Nimzo-Indian: Leningrad, main line
+rnbqk2r/pp3ppp/2p2n2/1BbP4/3p4/5N2/PPP1QPPP/RNB1K2R b KQkq -
+Bishop's opening: Urusov gambit, Panov variation *
+rnbqk2r/pp3ppp/2p2n2/2b1p3/4P3/1B1p4/PPPPQPPP/RNB1K1NR w KQkq -
+Giuoco Piano: Eisinger variation *
+rnbqk2r/pp3ppp/2p2n2/2bP4/2BPp3/2N2N2/PPP2PPP/R1BQK2R b KQkq d3
+Giuoco Piano *
+rnbqk2r/pp3ppp/2p2n2/2bPN3/4p3/2N5/PPPPBPPP/R1BQK2R b KQkq -
+Hungarian defense: Tartakower variation *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/4P3/1BN5/PPPPQPPP/R1B1K1NR b KQkq -
+Giuoco Piano: center-holding variation *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Delmar variation *
+rnbqk2r/pp3ppp/2p2n2/b2pp3/4P3/P1NP2P1/1PPB1P1P/R2QKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, fianchetto (Bronstein) variation *
+rnbqk2r/pp3ppp/2p2n2/b2pp3/4P3/P1NP4/1PPBNPPP/R2QKB1R b KQkq -
+Ruy Lopez: modern Steinitz defense, Rubinstein variation *
+rnbqk2r/pp3ppp/2pb1n2/3p4/2PPp3/1QN1P3/PP3PPP/R1B1KBNR w KQkq -
+French: advance, Milner-Barry gambit *
+rnbqk2r/pp3ppp/2pb4/4n3/3pP3/3P1N2/PPP1B1PP/RNBQK2R b KQkq -
+Ponziani counter-gambit, Cordel variation *
+rnbqk2r/pp3ppp/2pbpn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Colle system *
+rnbqk2r/pp3ppp/3p1n2/2p1p3/1b2P3/2NP1N2/PPP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Berlin defense, Duras variation *
+rnbqk2r/pp3ppp/3p1n2/b1p1p3/4P3/P1NP1N2/1PP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Morphy defense, Duras variation *
+rnbqk2r/pp3ppp/4p3/2Pn4/8/P1P2P2/4P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch, Keres variation
+rnbqk2r/pp3ppp/4pn2/2b3B1/3p4/P3P3/1PP2PPP/RN1QKBNR w KQkq -
+QGA: Alekhine defense, Alatortsev variation *
+rnbqk2r/pp3ppp/4pn2/2bp4/2P5/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGA: classical variation *
+rnbqk2r/pp3ppp/4pn2/2pP4/3P4/P1P2P2/4P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pp3ppp/5n2/1B1pN3/1b1Pp3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Giuoco Piano: Anderssen variation *
+rnbqk2r/pp3ppp/5n2/2bpp3/2B5/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano *
+rnbqk2r/pp3ppp/5n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR b KQkq -
+Giuoco Piano: LaBourdonnais variation *
+rnbqk2r/pp3ppp/5n2/2ppp3/1b2P3/2NP4/PPPB1PPP/R2QKBNR w KQkq -
+Ruy Lopez: old Steinitz defense, semi-Duras variation *
+rnbqk2r/pp4pp/2p2n2/2bPp3/2B2P2/8/PPP3PP/RNBQK1NR w KQkq -
+KGD: classical, R\'eti variation *
+rnbqk2r/pp4pp/4p3/2Pn1p2/8/P1P2P2/4P1PP/R1BQKBNR w KQkq -
+Nimzo-Indian: S\"amisch, Romanovsky variation
+rnbqk2r/ppn1bppp/8/2p1p3/8/2NP2PN/PP2PPBP/R1BQK2R b KQkq -
+Sicilian: accelerated fianchetto, Simagin variation *
+rnbqk2r/ppp1b1pp/3p1n2/3Pp3/4N3/2PB4/PP3PPP/RNBQK2R w KQkq -
+Ponziani counter-gambit, Cordel variation
+rnbqk2r/ppp1bppp/4p3/3p2B1/2PPn3/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: Lasker variation
+rnbqk2r/ppp1bppp/4p3/3pP1B1/3Pn3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Tartakower variation
+rnbqk2r/ppp1bppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq -
+French: classical, Anderssen-Richter variation
+rnbqk2r/ppp1bppp/4pB2/3p4/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: classical, Anderssen variation
+rnbqk2r/ppp1bppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: 4.Bg5 Be7
+rnbqk2r/ppp1bppp/4pn2/3p2B1/3PP3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical
+rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq -
+English: Neo-Catalan declined
+rnbqk2r/ppp1bppp/4pn2/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: classical variation (5.Bf4)
+rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Catalan: closed, 5.Nf3
+rnbqk2r/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Catalan: open, classical line
+rnbqk2r/ppp1bppp/5n2/3p2B1/3Np3/2PP4/PP2PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: modern, Flohr variation *
+rnbqk2r/ppp1bppp/5n2/3pp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Tayler opening *
+rnbqk2r/ppp1bppp/8/3pP3/4n3/2N2N2/PPPP2PP/R1BQKB1R w KQkq -
+Vienna gambit: Breyer variation
+rnbqk2r/ppp1npbp/6p1/3pp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+R\'eti: King's Indian attack, Pachman system
+rnbqk2r/ppp1nppp/8/8/3PN3/8/PP3PPP/R2QKBNR w KQkq -
+Bishop's opening: Lisitsyn variation *
+rnbqk2r/ppp1ppbp/1n1p2p1/4P3/P2P4/1B3N2/1PP2PPP/RNBQK2R b KQkq -
+Alekhine's defense: modern, Keres variation
+rnbqk2r/ppp1ppbp/1n4p1/8/3PP3/6P1/PP2NPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.cd, main line
+rnbqk2r/ppp1ppbp/3p1np1/6B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+King's Indian: Smyslov system
+rnbqk2r/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP3PPP/R2QKBNR b KQkq -
+King's Indian: accelerated Averbakh system
+rnbqk2r/ppp1ppbp/3p1np1/8/2BPPP2/2N5/PPP3PP/R1BQK1NR b KQkq -
+Pirc: Austrian attack, Ljubojevi\'c variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+King's Indian: fianchetto variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+King's Indian: 5.Nf3
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR b KQkq -
+King's Indian: S\"amisch variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N3P1/PP3P1P/R1BQKBNR b KQkq -
+King's Indian with e4 & g3
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N4P/PP3PP1/R1BQKBNR b KQkq -
+King's Indian: Makagonov system (5.h3)
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2BPPP/R1BQK1NR b KQkq -
+King's Indian: 5.Be2
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2NPPP/R1BQKB1R b KQkq -
+King's Indian: Kramer system
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR b KQkq -
+King's Indian: Four pawns attack
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP1P1/2N5/PPP1BP1P/R1BQK1NR b KQkq -
+Pirc: Chinese variation
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP2P/2N5/PPP1BPP1/R1BQK1NR b KQkq -
+Pirc: bayonet (Mariotti) attack
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -
+Pirc: classical, h3 system
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQK2R b KQkq -
+Pirc: classical system, 5.Be2
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Pirc: classical (two knights) system
+rnbqk2r/ppp1ppbp/5np1/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Gr\"unfeld: 5.Bg5
+rnbqk2r/ppp1ppbp/5np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq -
+Queen's Indian: Marienbad system *
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Gr\"unfeld: 5.Bf4
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/1QN2N2/PP2PPPP/R1B1KB1R b KQkq -
+Gr\"unfeld: Russian variation
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+Gr\"unfeld: 5.e3
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Gr\"unfeld: Three knights variation
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.Nf3
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+King's Indian: 3.g3, counterthrust variation
+rnbqk2r/ppp1ppbp/5np1/3p4/Q1PP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq -
+Gr\"unfeld: Flohr variation
+rnbqk2r/ppp1ppbp/6p1/3n4/3P4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Neo-Gr\"unfeld, 5.cd
+rnbqk2r/ppp1ppbp/6p1/8/2BPP3/2P5/P4PPP/R1BQK1NR b KQkq -
+Gr\"unfeld: exchange, classical variation
+rnbqk2r/ppp1ppbp/6p1/8/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq -
+Gr\"unfeld: modern exchange variation
+rnbqk2r/ppp1ppbp/6pn/3p4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Dutch defense, Blackburne variation *
+rnbqk2r/ppp1ppbp/6pn/3p4/5P2/6P1/PPPPP1BP/RNBQK1NR w KQkq -
+Dutch: Leningrad, Karlsbad variation *
+rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQ1RK1 b kq -
+KGA: Kieseritsky, Rice gambit
+rnbqk2r/ppp2p2/4p1pp/3pP3/3Pn1Q1/2P5/P1PB1PPP/R3KBNR w KQkq -
+French: MacCutcheon, Lasker variation, 8...g6
+rnbqk2r/ppp2pbp/6p1/3np3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: Anglo-Gr\"unfeld defense, Korchnoi variation
+rnbqk2r/ppp2pp1/4pP1p/3p2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Chigorin variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P3B/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Bernstein variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N1B3/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Janowski variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: MacCutcheon, Dr. Olland (Dutch) variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/3P4/2b5/PPPB1PPP/R2QKBNR w KQkq -
+French: MacCutcheon, Lasker variation
+rnbqk2r/ppp2ppp/3b1n2/3pN3/3P4/3B4/PPP2PPP/RNBQK2R b KQkq -
+Petrov: classical attack, Marshall variation *
+rnbqk2r/ppp2ppp/3b3n/8/3P4/5N2/PPP1P1PP/RNBQKB1R b KQkq -
+Bird: From gambit, Lipke variation
+rnbqk2r/ppp2ppp/3b4/3np3/2B5/P3P3/1P1P1PPP/RNBQK1NR b KQkq -
+Sicilian: Kan, Polugaievsky variation *
+rnbqk2r/ppp2ppp/3b4/3np3/8/P3P1P1/1P1P1P1P/RNBQKBNR b KQkq -
+Sicilian: Kan, Swiss cheese variation *
+rnbqk2r/ppp2ppp/3b4/3np3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, 5.Bd3 *
+rnbqk2r/ppp2ppp/3b4/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq -
+Petrov: classical attack, Marshall variation
+rnbqk2r/ppp2ppp/3bpn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Pianissimo *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Giuoco Pianissimo *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense (Modern bishop's opening) *
+rnbqk2r/ppp2ppp/3p1n2/4p3/1b2P3/5N2/PPPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense, Mortimer variation *
+rnbqk2r/ppp2ppp/3p1n2/4p3/4P3/2bP1N2/PPP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Berlin defense, Anderssen variation *
+rnbqk2r/ppp2ppp/3p1n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Anderssen variation *
+rnbqk2r/ppp2ppp/3p4/2b1pP2/2B1P1n1/2N5/PPPP2PP/R1BQK1NR b KQkq -
+Giuoco Pianissimo: Dubois variation *
+rnbqk2r/ppp2ppp/3p4/2b5/N2pP1n1/5N2/PPP2PPP/R1BQKB1R w KQkq -
+two knights defense: Kieseritsky variation *
+rnbqk2r/ppp2ppp/3p4/4p3/1b2n3/2P2N2/PP1PNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense, Mortimer trap *
+rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P1Q5/1P2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation, main line
+rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P7/1PQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical, Noa variation, main line, 7.Qc2
+rnbqk2r/ppp2ppp/4pn2/3p2B1/1b1PP3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: MacCutcheon variation
+rnbqk2r/ppp2ppp/4pn2/3p2B1/1bPP4/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD: Vienna variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: Ragozin variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical, Noa variation, 5.a3
+rnbqk2r/ppp2ppp/4pn2/3pP1B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, advance variation
+rnbqk2r/ppp2ppp/4pn2/6B1/1bpP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD: Ragozin, Vienna variation
+rnbqk2r/ppp2ppp/5n2/1BbPp3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/5n2/2bPp3/1PP5/8/P2P1PPP/RNBQKBNR b KQkq -
+Center game, Kieseritsky variation *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Scotch gambit: Dubois-R\'eti defense *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Scotch gambit: Benima defense *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening/Petrov: Urusov gambit *
+rnbqk2r/ppp2ppp/5n2/2bpp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/ppp2ppp/5n2/2bpp3/4P3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Klein variation *
+rnbqk2r/ppp2ppp/5n2/3P4/1b3P2/2NPp3/PPPB2PP/R2QKBNR w KQkq -
+KGD: Falkbeer, Morphy gambit
+rnbqk2r/ppp2ppp/5n2/3Pp3/1b6/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch: Relfsson gambit (`MacLopez') *
+rnbqk2r/ppp2ppp/5n2/3p4/1b1P4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation, 5.cd ed
+rnbqk2r/ppp2ppp/5n2/3pp3/4P3/P1PP1P2/2P3PP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, Alapin variation *
+rnbqk2r/ppp2ppp/5n2/3pp3/4P3/P1PP4/2P2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Richter variation *
+rnbqk2r/ppp2ppp/8/1Bbp4/3NP1n1/2N5/PPP2PPP/R1BQK2R b KQkq -
+two knights defense: Pincus variation *
+rnbqk2r/ppp2ppp/8/2bPp3/2B3n1/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/8/2bPp3/5P2/3P3N/PPP3Pn/RNBQKB1R w KQkq -
+Philidor: L\'opez counter-gambit, Jaenisch variation *
+rnbqk2r/ppp2ppp/8/2bPp3/6n1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense, Perreux variation *
+rnbqk2r/ppp2ppp/8/2bp4/3NP1n1/2N5/PPP2PPP/R1BQKB1R w KQkq -
+two knights defense: Lolli attack *
+rnbqk2r/ppp2ppp/8/2bpp3/4P1n1/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Kmoch variation *
+rnbqk2r/ppp3p1/8/2bppPPp/4nP2/8/PPPPQ2P/RNB1KBNR w KQkq -
+KGA: Kieseritsky, Salvio defense, Cozio variation *
+rnbqk2r/ppp3p1/8/3ppPPp/3b4/7P/PPP3K1/RNBQ1BNR w kq -
+KGA: Allgaier, Urusov attack *
+rnbqk2r/ppp3pp/5n2/2bppPP1/8/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Ghulam Kassim gambit *
+rnbqk2r/ppp3pp/5p2/3np3/1b2P3/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Prins variation, Venice attack *
+rnbqk2r/pppn1pp1/4p2p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq -
+French: MacCutcheon, Tartakower variation
+rnbqk2r/pppnb1pp/4pp2/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Teichmann variation
+rnbqk2r/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR b KQkq -
+French: Albin-Alekhine-Ch\^atard attack
+rnbqk2r/pppp1ppp/1b3n2/4p3/1PB1P3/P1N5/2PP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Graz variation *
+rnbqk2r/pppp1ppp/1b3n2/4p3/NP2P3/P7/2PP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Taimanov (chase/wing/accelerated counterthrust) variation *
+rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+Nimzo-Indian: Leningrad variation
+rnbqk2r/pppp1ppp/4pn2/8/1bP5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: Nimzo-English opening
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: Spielmann variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq -
+Nimzo-Indian: 4.e3
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: three knights variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: Kmoch variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq -
+Nimzo-Indian: Romanishin-Kasparov (Steiner) system
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Nimzo-Indian defense
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2NQ4/PP2PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: Mikenas attack
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+Bogo-Indian defense, Gr\"unfeld variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Bogo-Indian defense
+rnbqk2r/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pppp1ppp/5n2/1B2p3/1b2P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Alapin's defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Giuoco Piano *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Two knights defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+King's pawn game *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Hungarian defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: Italian variation *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Rousseau gambit *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+Philidor: L\'opez counter-gambit *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+Latvian gambit, 3.Bc4 *
+rnbqk2r/pppp1ppp/5n2/3Np3/1b2P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Bird's defense *
+rnbqk2r/pppp1ppp/5n2/4P3/1bB2p2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+KGA: bishop's gambit, Paulsen attack
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: Brentano defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P1Q1/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Vienna: Zhuravlev countergambit
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N2P2/PPPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Nuremberg variation *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: fianchetto (Smyslov/Barnes) defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez (Spanish opening) *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Ruy Lopez: Lucena defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPQPPP/R1B1KBNR b KQkq -
+Ruy Lopez: Vinogradov variation *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2NP4/PPP2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: old Steinitz defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Schliemann defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: classical (Cordel) defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+Sicilian: Nimzovich-Rossolimo attack (with ...g6, without ...d6) *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen, Smyslov system
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: Nimzovich-Rossolimo attack (without ...d6) *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/3P4/PP1BPPPP/RN1QKBNR b KQkq -
+Sicilian: Canal-Sokolsky attack, 3...Bd7 *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack *
+rnbqk2r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1bPP/R1BQK1NR w KQkq -
+Giuoco Piano: Jerome gambit *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1PP4/2P2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, exchange variation *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1b2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Treybal (Bayreuth) variation (exchange var. deferred) *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1b5/1PPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange variation *
+rnbqk2r/pppp1ppp/5n2/4p3/Nb2P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Pollock defense *
+rnbqk2r/pppp1ppp/5n2/b2Np3/4P3/P7/1PPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Bird's defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/1P2P3/P1N5/2PP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Caro variation *
+rnbqk2r/pppp1ppp/5n2/b3p3/2B1P3/P1N5/1PPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Classical defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq -
+Ruy Lopez: Morphy defense *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N3P1/1PPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: fianchetto defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N5/1PPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N5/1PPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pppp1ppp/5n2/b3p3/4PP2/P1N5/1PPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Schliemann defense deferred *
+rnbqk2r/pppp1ppp/5n2/bB2p3/4P3/P1N5/1PPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Alapin's defense deferred *
+rnbqk2r/pppp1ppp/8/2b1P3/3Pn3/8/PPP3PP/RNBQKBNR b KQkq -
+Latvian: Polerio variation *
+rnbqk2r/pppp1ppp/8/2b1P3/4n3/5N2/PPPP2PP/RNBQKB1R b KQkq -
+Latvian: corkscrew counter-gambit *
+rnbqk2r/pppp1ppp/8/2b1p3/2B1P1n1/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+two knights defense: Wilkes Barre (Traxler) variation *
+rnbqk2r/pppp1ppp/8/2b1p3/4P1n1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/pppp1ppp/8/2b5/1P1pP1n1/2N2N2/P1P2PPP/R1BQKB1R b KQkq -
+two knights defense: Ulvestad variation *
+rnbqk2r/pppp1ppp/8/2b5/3NP3/2N5/PPP2nPP/R1BQKB1R w KQkq -
+two knights defense: Fegatello attack *
+rnbqk2r/pppp1ppp/8/2b5/N2pP1n1/5N2/PPP2PPP/R1BQKB1R b KQkq -
+two knights defense *
+rnbqk2r/pppp1ppp/8/2bN4/3pP1n1/5N2/PPP2PPP/R1BQKB1R b KQkq -
+two knights defense: Fritz variation *
+rnbqk2r/pppp1ppp/8/8/Nb1pP1n1/5N2/PPP2PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/pppp2p1/5n2/2b1pP1p/6P1/8/PPPP1PBP/RNBQK1NR w KQkq -
+KGA: Philidor gambit *
+rnbqk2r/pppp2p1/8/2b1pPPp/4n3/5N2/PPPP1P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense, 6.Bc4 *
+rnbqk2r/pppp2p1/8/2b1pPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Walker attack *
+rnbqk2r/pppp2pp/4pn2/5p2/1bPP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Dutch defense: Dutch-Indian (Nimzo-Dutch) variation
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+KGA: Blachly gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: King's knight's gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1PBP/RNBQK1NR b KQkq -
+King's knight's gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/8/5N2/PPPPBPPP/RNBQK2R b KQkq -
+KGA: Cunningham, Euwe defense *
+rnbqk2r/pppp2pp/5n2/2b2P2/3N4/2P5/P4PPP/RNBQKB1R b KQkq -
+KGA: Abbazia defense, Botvinnik variation *
+rnbqk2r/pppp2pp/5n2/4pPP1/8/8/PPPP1b1P/RNBQKBNR w KQkq -
+KGA: Lolli gambit (wild Muzio gambit) *
+rnbqk2r/pppp2pp/8/2b1pPP1/4n3/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Salvio gambit *
+rnbqk2r/pppp3p/5np1/2b1pP1B/8/8/PPPP1PPP/RNBQK1NR w KQkq -
+KGA: Cunningham, Bertin gambit *
+rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP1BPPBP/RN1QK1NR w KQkq -
+Dutch-Indian, Alekhine variation
+rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Dutch defense
+rnbqk2r/ppppbppp/3n4/4p2Q/8/1BN5/PPPP1PPP/R1B1K1NR w KQkq -
+Vienna game
+rnbqk2r/ppppbppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Inverted Hungarian *
+rnbqk2r/ppppbppp/5n2/8/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Cunningham, Euwe defense
+rnbqk2r/ppppbppp/7n/8/N3P3/2P2N1P/P4PP1/R1BQKB1R w KQkq -
+two knights defense: Steinitz variation *
+rnbqk2r/ppppbppp/8/4P3/N3n3/2P2N1P/P1Q2PP1/R1B1KB1R b KQkq -
+two knights defense: G\"oring variation *
+rnbqk2r/ppppbppp/8/8/N3P1n1/2P2N1P/P4PP1/R1BQKB1R b KQkq -
+Two knights defense *
+rnbqk2r/ppppbppp/8/8/N3P1n1/2P2N2/P4PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/ppppp1bp/5np1/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Dutch: Leningrad, main variation
+rnbqk2r/ppppp2p/6pb/5P2/3P4/8/PPP2PPP/RN1QKBNR b KQkq -
+Amar gambit *
+rnbqk2r/ppppppbp/5np1/6B1/3P4/8/PPPNPPPP/R2QKBNR b KQkq -
+R\'eti: King's Indian attack, Keres variation *
+rnbqk2r/ppppppbp/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+R\'eti: King's Indian attack *
+rnbqk2r/ppppppbp/5np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+King's Indian: 4.e4
+rnbqkb1r/1p2pppp/p2p1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Najdorf, 6.Bg5
+rnbqkb1r/1p2pppp/p2p1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Najdorf, Lipnitzky attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Najdorf, Byrne (English) attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Najdorf, Zagreb (fianchetto) variation
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N4P/PPP2PP1/R1BQKB1R b KQkq -
+Sicilian: Najdorf, Adams attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Najdorf, Opo\v censky variation
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Najdorf
+rnbqkb1r/1p2pppp/p2p1n2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: Najdorf, 6.f4
+rnbqkb1r/1p2pppp/p4n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: Petrosian system *
+rnbqkb1r/1p3p1p/p2ppnp1/8/2PNP3/3B4/PP3PPP/RNBQ1RK1 w kq -
+Sicilian: Kan, Gipslis variation
+rnbqkb1r/1p3ppp/p1p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: accelerated Meran (Alekhine variation)
+rnbqkb1r/1p3ppp/p2ppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 6...e6
+rnbqkb1r/1p3ppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R b KQkq -
+Sicilian: Najdorf, 7.f4
+rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1B3/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Scheveningen, English variation
+rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: Scheveningen (Paulsen), classical variation
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP2QPPP/RNB2RK1 b kq -
+QGA: classical, 7.Qe2
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq -
+QGA: classical, 6...a6
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BPP3/5N2/PP3PPP/RNBQ1RK1 b kq -
+QGA: classical, Geller variation
+rnbqkb1r/1p3ppp/p3pn2/2p5/P1BP4/4PN2/1P3PPP/RNBQ1RK1 b kq -
+QGA: classical, Rubinstein variation
+rnbqkb1r/1p3ppp/p4n2/1N1pp1B1/Q1P5/2N5/PP2PPPP/R3KB1R b KQkq -
+QGD: Semi-Tarrasch, Krause variation
+rnbqkb1r/1pp1pppp/p4n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGA, Bogolyubov variation
+rnbqkb1r/1ppp1ppp/p3pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Dzindzikhashvili defense
+rnbqkb1r/2pp1ppp/p3pn2/1p6/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -
+English: Romanishin gambit
+rnbqkb1r/3ppppp/P4n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq -
+Benk\"o gambit accepted
+rnbqkb1r/3ppppp/p4n2/1PpP4/8/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Benk\"o gambit: Zaitsev system
+rnbqkb1r/3ppppp/p4n2/1PpP4/8/8/PP2PPPP/RNBQKBNR w KQkq -
+Benk\"o gambit half accepted
+rnbqkb1r/4pppp/3p1n2/1NpP4/1pB1P3/8/PP3PPP/R1BQK1NR b KQkq -
+Benk\"o gambit: Nescaf\'e Frapp\'e attack
+rnbqkb1r/5ppp/p2ppn2/1p4B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, Polugayevsky variation
+rnbqkb1r/5ppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin with ...a6 and ...b5
+rnbqkb1r/5ppp/p3pn2/1pp5/2BP4/4PN2/PP2QPPP/RNB2RK1 w kq -
+QGA: classical, 7...b5
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: Queens Indian formation
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP1B2/5N2/PP2PPPP/RN1QKB1R b KQkq -
+Queen's Indian: Miles variation
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Queen's Indian: 4.Nc3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+Queen's Indian: 4.e3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Queen's Indian defense
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+Queen's Indian: 4.g3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/P4N2/1P2PPPP/RNBQKB1R b KQkq -
+Queen's Indian: Petrosian system
+rnbqkb1r/p1pp1ppp/5n2/1p2p3/2P5/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit deferred *
+rnbqkb1r/p1pp1ppp/5n2/1p4N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq -
+English: Bellon gambit
+rnbqkb1r/p1pp1ppp/5n2/1p6/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: Wing gambit *
+rnbqkb1r/p1pp2pp/5n2/1p2pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, Heath variation *
+rnbqkb1r/p1ppp1pp/1p3n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+Dutch: Staunton gambit, Nimzovich variation
+rnbqkb1r/p1pppp1p/5np1/1p1P4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+King's Indian: Danube gambit
+rnbqkb1r/p1pppp1p/5np1/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack, R\'eti-Smyslov variation *
+rnbqkb1r/p1pppppp/1p3n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's Indian accelerated
+rnbqkb1r/p1pppppp/1p3n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's Indian defense
+rnbqkb1r/p1pppppp/1p3n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: Nimzovich-Larsen attack *
+rnbqkb1r/p1pppppp/5n2/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Santasiere's folly *
+rnbqkb1r/p1pppppp/5n2/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack, Spassky's variation
+rnbqkb1r/p1pppppp/8/1p1nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Alekhine's defense: O'Sullivan gambit
+rnbqkb1r/p2n1ppp/1p2p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -
+French: Tarrasch, Botvinnik variation
+rnbqkb1r/p2p1pp1/5n1p/1ppP2B1/8/5N2/PP2PPPP/RN1QKB1R w KQkq -
+Blumenfeld counter-gambit, Spielmann variation
+rnbqkb1r/p2p1ppp/4pn2/1ppP2B1/2P5/5N2/PP2PPPP/RN1QKB1R b KQkq -
+Blumenfeld counter-gambit, Dus-Chotimursky variation
+rnbqkb1r/p2p1ppp/4pn2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit
+rnbqkb1r/p2ppp1p/1p3np1/2p3B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: Torre defensive system *
+rnbqkb1r/p2ppp1p/1p3np1/2p5/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: London defensive system *
+rnbqkb1r/p2ppppp/1p3n2/2p3B1/3P4/2P5/PP2PPPP/RN1QKBNR b KQkq -
+English: Caro-Kann defensive system, Bogolyubov variation *
+rnbqkb1r/p2ppppp/1p3n2/2p5/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+English: Caro-Kann defensive system *
+rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benk\"o gambit
+rnbqkb1r/p3pppp/2p2n2/1p2P3/2pP4/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: Tolush-Geller gambit
+rnbqkb1r/p3pppp/5n2/1ppP4/2p1P3/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGA: Linares variation
+rnbqkb1r/p4p2/2p1p2p/1p1nP1N1/2pP3B/2N5/PP3PPP/R2QKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Alatortsev system
+rnbqkb1r/p4p2/2p1pP1p/1p2N3/2pP3p/2N5/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Ekstrom variation
+rnbqkb1r/p4p2/2p1pn1p/1p2P1N1/2pP3B/2N5/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: anti-Meran gambit
+rnbqkb1r/p4ppp/2p5/3n4/2B2p2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Abbazia defense, Botvinnik variation
+rnbqkb1r/p5pp/4pn2/1Ppp4/8/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit accepted
+rnbqkb1r/pp1n1ppp/4p3/2ppP3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQkq -
+French: Steinitz variation
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen system, Keres variation
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Ponziani: Jaenisch counter-attack *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Ponziani opening *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Ponziani: Romanishin variation *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Ponziani: R\'eti variation *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Ponziani counter-gambit *
+rnbqkb1r/pp1p1ppp/2p2n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR w KQkq -
+KGA: bishop's gambit, Jaenisch variation
+rnbqkb1r/pp1p1ppp/2p5/3Nn3/1P1NP3/8/P1P2PPP/R1BQKB1R w KQkq -
+two knights defense: Fritz, Gruber variation *
+rnbqkb1r/pp1p1ppp/4pn2/2P5/8/4B3/PPP1PPPP/RN1QKBNR b KQkq -
+R\'eti accepted: Keres variation *
+rnbqkb1r/pp1p1ppp/4pn2/2p3B1/3PP3/5N2/PPP2PPP/RN1QKB1R b KQkq -
+Queen's pawn: Torre attack, Wagner gambit
+rnbqkb1r/pp1p1ppp/4pn2/2p5/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -
+English: Mikenas-Carls, Sicilian variation
+rnbqkb1r/pp1p1ppp/4pn2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense
+rnbqkb1r/pp1p1ppp/4pn2/8/2PN4/8/PP2PPPP/RNBQKB1R w KQkq -
+English: symmetrical variation
+rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Anderssen variation
+rnbqkb1r/pp1p1ppp/5n2/2p1N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Kaufmann attack *
+rnbqkb1r/pp1p1ppp/5n2/2p1p3/2P5/6PB/PP1PPP1P/RNBQK1NR b KQkq -
+Sicilian: Acton extension *
+rnbqkb1r/pp1p1ppp/5n2/2p1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Dresden opening *
+rnbqkb1r/pp1p1ppp/5n2/2pPp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq e6
+Czech Benoni defense
+rnbqkb1r/pp1p2pp/2p2n2/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, 4.c3 *
+rnbqkb1r/pp1p2pp/2p2n2/4pp2/2B1PP2/3P4/PPP3PP/RNBQK1NR b KQkq -
+KGD: classical counter-gambit *
+rnbqkb1r/pp1pp1pp/2p2n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+Dutch: Staunton gambit, Chigorin variation
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+English: Kurajica defense *
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+English opening: Agincourt variation *
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+English: Neo-Catalan *
+rnbqkb1r/pp1ppppp/1n6/2p1P3/8/1B1P4/PPP2PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Kmoch variation
+rnbqkb1r/pp1ppppp/2p2n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Caro-Masi defense
+rnbqkb1r/pp1ppppp/5n2/2P5/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti accepted *
+rnbqkb1r/pp1ppppp/5n2/2p1P3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+English, Nimzovich, Flohr variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: symmetrical variation
+rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+English: symmetrical, Benoni formation
+rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense
+rnbqkb1r/pp1ppppp/5n2/2p5/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+English opening: Agincourt variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti opening *
+rnbqkb1r/pp1ppppp/5n2/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Nimzovich-Rubinstein variation
+rnbqkb1r/pp1ppppp/5n2/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+English, Nimzovich variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English opening *
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Old Benoni defense
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti: advance variation *
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkb1r/pp1ppppp/5n2/3P4/2p5/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Hawk (Habichd) defense
+rnbqkb1r/pp1ppppp/8/2pP4/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -
+Vulture defense
+rnbqkb1r/pp2pp1p/2p2np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: Bled variation
+rnbqkb1r/pp2pp1p/2p2np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav\Gr\"unfeld: Schlechter variation
+rnbqkb1r/pp2pp1p/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Bronstein-Larsen variation
+rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B3/PPPQ1PPP/R3KBNR b KQkq -
+Pirc: 150 attack
+rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: dragon, 6.Be3
+rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: dragon variation
+rnbqkb1r/pp2pp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: dragon, Levenfish variation
+rnbqkb1r/pp2pp1p/5np1/2pP4/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+QGD: Albin counter-gambit, 5.g3 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.g3 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/1P2PN2/PBPP1PPP/RN1QKB1R b KQkq -
+Queen's Indian: 4.g3 Bb7 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/BP2PN2/P1PP1PPP/RN1QKB1R b KQkq -
+Queen's Indian: Nimzovich variation (exaggerated fianchetto) *
+rnbqkb1r/pp2pp1p/5np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...g6
+rnbqkb1r/pp2pp1p/6p1/2p3B1/2PPp3/8/PP1QPPPP/R3KBNR w KQkq -
+Gr\"unfeld: Lundin variation
+rnbqkb1r/pp2pppp/2p2n2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -
+Scandinavian gambit
+rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq -
+English: Caro-Kann defensive system
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD Slav: 4.Nc3
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD Slav: 4.e3
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+QGD Slav: Breyer variation
+rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: 5.e3 (Alekhine variation)
+rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav accepted
+rnbqkb1r/pp2pppp/2p2n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: Slav gambit
+rnbqkb1r/pp2pppp/2p2n2/8/3PN3/3B4/PPP2PPP/R1BQK1NR b KQkq -
+Caro-Kann: Alekhine gambit
+rnbqkb1r/pp2pppp/2p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R b KQkq -
+QGD Slav accepted: Alapin variation
+rnbqkb1r/pp2pppp/2pp1n2/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Pirc: Ufimtsev-Pytel variation
+rnbqkb1r/pp2pppp/3p1n2/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Cortlever (Alatortsev) variation
+rnbqkb1r/pp2pppp/3p1n2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense, Hromodka system
+rnbqkb1r/pp2pppp/3p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian
+rnbqkb1r/pp2pppp/3p1n2/8/3NP3/5P2/PPP3PP/RNBQKB1R b KQkq -
+Sicilian: Prins (Moscow) variation
+rnbqkb1r/pp2pppp/5n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+Bogo-Indian defense *
+rnbqkb1r/pp2pppp/5n2/2Pp4/1P6/8/P1P1PPPP/RNBQKBNR b KQkq -
+QGA: Ericson variation *
+rnbqkb1r/pp2pppp/5n2/2Pp4/3P4/8/PP3PPP/RNBQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik, Gunderam attack
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's gambit accepted *
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+QGA: 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/P7/1PP1PPPP/RNBQKBNR b KQkq -
+QGA: Alekhine defense *
+rnbqkb1r/pp2pppp/5n2/2p3N1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Adler variation *
+rnbqkb1r/pp2pppp/5n2/2p5/1PPp4/4PN2/P2P1PPP/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit *
+rnbqkb1r/pp2pppp/5n2/2pP4/4p3/8/PPP2PPP/RNBQKBNR w KQkq -
+QGD: Albin counter-gambit *
+rnbqkb1r/pp2pppp/5n2/2pp4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English: symmetrical, Benoni formation *
+rnbqkb1r/pp2pppp/5n2/2pp4/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav: 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld defense *
+rnbqkb1r/pp2pppp/5n2/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Bird's opening: Lasker variation
+rnbqkb1r/pp2pppp/5n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R b KQkq -
+Queen's Indian defense *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian, 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/P3PN2/1PPP1PPP/RNBQKB1R b KQkq -
+Dzindzikhashvili defense *
+rnbqkb1r/pp2pppp/5n2/2ppN3/8/4P3/PPPP1PPP/RNBQKB1R b KQkq -
+D\"ory defense *
+rnbqkb1r/pp2pppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik attack
+rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav: exchange variation *
+rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: exchange variation
+rnbqkb1r/pp2pppp/5n2/8/1pPP4/4PN2/P5PP/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit accepted *
+rnbqkb1r/pp2pppp/8/2pn4/8/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: symmetrical, three knights system
+rnbqkb1r/pp2pppp/8/2pn4/8/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+English: symmetrical variation *
+rnbqkb1r/pp3p1p/2p1pnp1/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Spielmann variation
+rnbqkb1r/pp3p1p/3p1np1/2pP2B1/8/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Benoni: Uhlmann variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+Benoni: classical with e4 and Nf3
+rnbqkb1r/pp3p1p/3p1np1/2pP4/4PP2/2N5/PP4PP/R1BQKBNR b KQkq -
+Benoni: pawn storm variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Benoni defense
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+Benoni: fianchetto variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -
+Benoni: Nimzovich (knight's tour) variation
+rnbqkb1r/pp3p1p/3p1np1/2pPp3/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Czech Benoni: King's Indian system
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: 5.e3
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD semi-Slav
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav
+rnbqkb1r/pp3ppp/2p1pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD semi-Slav: 5.Bg5 dc
+rnbqkb1r/pp3ppp/2p1pn2/6B1/2pPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Botvinnik system (anti-Meran)
+rnbqkb1r/pp3ppp/2p1pn2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Soultanb\'eieff variation
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/4P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Andreaschek gambit *
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch: G\"oring gambit *
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: Tartakower variation *
+rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: exchange, positional line, 5...c6
+rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PPQ1PPPP/R3KBNR b KQkq -
+QGD: exchange, positional line, 6.Qc2
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/1Q2P3/PP1B1PPP/RN2KBNR b KQkq -
+French: advance, Wade variation *
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/2N1P3/PP1B1PPP/R2QKBNR b KQkq -
+French: advance, Euwe variation *
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+French: advance, Paulsen attack *
+rnbqkb1r/pp3ppp/2p2n2/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: Geller's system *
+rnbqkb1r/pp3ppp/2p2n2/4N3/2BpP3/2N5/PPPP1PPP/R1BQK2R b KQkq -
+Ponziani: Fraser defense *
+rnbqkb1r/pp3ppp/2p2n2/4p3/3pPP2/2NP4/PPP3PP/R1BQKBNR w KQkq -
+Ponziani counter-gambit, Schmidt attack *
+rnbqkb1r/pp3ppp/2p2p2/8/2BP4/8/PPP2PPP/R1BQK1NR b KQkq -
+Caro-Kann: Forg\'acs variation
+rnbqkb1r/pp3ppp/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Tartakower (Nimzovich) variation
+rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Venice attack
+rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/5P2/PPP3PP/RNBQK2R b KQkq -
+Sicilian: Prins variation, Venice attack
+rnbqkb1r/pp3ppp/3p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Benoni: 6.e4
+rnbqkb1r/pp3ppp/3ppn2/1B6/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Scheveningen, Vitoli\'n\'s variation
+rnbqkb1r/pp3ppp/3ppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Sozin attack
+rnbqkb1r/pp3ppp/3ppn2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, Keres attack
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, fianchetto variation
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Scheveningen, 6.Be2
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Scheveningen variation
+rnbqkb1r/pp3ppp/3ppn2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, 6.f4
+rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD: Semi-Tarrasch with e3
+rnbqkb1r/pp3ppp/4pn2/2Pp2B1/8/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+QGA, Janowsky-Larsen variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/1P6/P7/2P1PPPP/RNBQKBNR b KQkq -
+QGA: Haberditz variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/4BN2/PPP1PPPP/RN1QKB1R b KQkq -
+QGA, Flohr variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+QGA: 4...e6 *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA, 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+QGA, Smyslov variation *
+rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 b kq -
+QGA: classical variation, 6.O-O
+rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQK2R w KQkq -
+QGA: classical variation
+rnbqkb1r/pp3ppp/4pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: Semi-Tarrasch
+rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Semi-Tarrasch, 5.cd
+rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: Semi-Tarrasch defense, Pillsbury variation
+rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: Been-Koomen variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/2P5/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq -
+English: Wimpey system
+rnbqkb1r/pp3ppp/4pn2/2pp4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: Semi-Tarrasch defense
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: 4.e3 Bf5 *
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P1BPN2/P1P2PPP/RNBQK2R b KQkq -
+Queen's pawn game, Rubinstein (Colle-Zukertort) variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P2PN2/P1PN1PPP/R1BQKB1R b KQkq -
+Queen's pawn game, Zukertort variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2PBPN2/PP3PPP/RNBQK2R b KQkq -
+Colle system
+rnbqkb1r/pp3ppp/4pn2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/3p2B1/2PQ4/2N2N2/PP2PPPP/R3KB1R b KQkq -
+QGD: Semi-Tarrasch, Primitive Pillsbury variation
+rnbqkb1r/pp3ppp/4pn2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...e6
+rnbqkb1r/pp3ppp/4pn2/8/2Bp4/4PN2/PP3PPP/RNBQ1RK1 w kq -
+QGA: classical, Steinitz variation
+rnbqkb1r/pp3ppp/5n2/2Ppp3/8/P7/1PP1PPPP/RNBQKBNR w KQkq -
+QGA: Alekhine defense, Borisenko-Furman variation *
+rnbqkb1r/pp3ppp/5n2/2p3B1/3pp3/1N1P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Vitolins attack *
+rnbqkb1r/pp3ppp/5n2/2pp2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Alekhine variation *
+rnbqkb1r/pp3ppp/5n2/2ppp1B1/8/3P2P1/PPP1PPBP/RN1QK1NR b KQkq -
+Robatsch defense: Rossolimo variation *
+rnbqkb1r/pp3ppp/8/2pnp3/8/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind *
+rnbqkb1r/pp3ppp/8/2pnp3/8/2N3P1/PP1PPPBP/R1BQK1NR b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 5...Bg7 *
+rnbqkb1r/pp3ppp/8/2pnp3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, Mar\'oczy bind (R\'eti variation) *
+rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: stonewall defense
+rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/3BPN2/PP1N1PPP/R1BQK2R w KQkq -
+QGD: Stonewall variation
+rnbqkb1r/pp4pp/5n2/3p2B1/2p5/1NN1P3/PPP1P1PP/R2QKB1R w KQkq -
+Alekhine's defense: four pawns attack, Ilyin-Genevsky variation *
+rnbqkb1r/ppn1pppp/8/2p5/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical, Rubinstein system
+rnbqkb1r/ppp1p1pp/5n2/3p4/8/3B3N/PPP2PPP/RNBQK2R w KQkq -
+Bird: From gambit, Lipke variation *
+rnbqkb1r/ppp1pp1p/1n1p2p1/4P3/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, fianchetto variation
+rnbqkb1r/ppp1pp1p/1n1p4/4P1p1/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, Planinc variation
+rnbqkb1r/ppp1pp1p/1n4p1/8/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: Anglo-Gr\"unfeld, Czech defense
+rnbqkb1r/ppp1pp1p/3p1np1/6B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -
+Pirc: Byrne variation
+rnbqkb1r/ppp1pp1p/3p1np1/8/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq -
+Pirc: Holmov system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Pirc: classical (two knights) system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N3P1/PPP2P1P/R1BQKBNR b KQkq -
+Pirc: Sveshnikov system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP1BPPP/R1BQK1NR b KQkq -
+Pirc defense
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Pirc defense
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Pirc: Austrian attack
+rnbqkb1r/ppp1pp1p/3p2p1/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, fianchetto variation
+rnbqkb1r/ppp1pp1p/5np1/3P4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Scandinavian: Richter variation
+rnbqkb1r/ppp1pp1p/5np1/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+Gr\"unfeld: Stockholm variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq -
+Gr\"unfeld: 4.Bf4
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP2P1/2N5/PP2PP1P/R1BQKBNR b KQkq -
+Gr\"unfeld: Spike gambit
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -
+Gr\"unfeld: Russian variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Gr\"unfeld: Three knights variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Neo-Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq -
+Neo-Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -
+Neo-Gr\"unfeld (Kemeri) defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: fianchetto without c4 *
+rnbqkb1r/ppp1pp1p/5np1/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Smyslov variation
+rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Gr\"unfeld: exchange variation
+rnbqkb1r/ppp1pp1p/6p1/8/8/2n3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: Anglo-Gr\"unfeld, Smyslov defense
+rnbqkb1r/ppp1pppp/1n1P4/8/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Alekhine's defense: exchange variation
+rnbqkb1r/ppp1pppp/1n1p4/4P3/2PP1P2/8/PP4PP/RNBQKBNR b KQkq -
+Alekhine's defense: four pawns attack
+rnbqkb1r/ppp1pppp/1n1p4/4P3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, Schmid variation
+rnbqkb1r/ppp1pppp/3p1n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Old Indian defense
+rnbqkb1r/ppp1pppp/3p1n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: old Indian attack *
+rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Pirc defense
+rnbqkb1r/ppp1pppp/3p4/3nP3/2BP4/8/PPP2PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Balogh variation
+rnbqkb1r/ppp1pppp/3p4/3nP3/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern variation
+rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/ppp1pppp/5n2/2P5/3p4/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Hawk (Habichd) defense *
+rnbqkb1r/ppp1pppp/5n2/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Scandinavian defense
+rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Scandinavian defense
+rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -
+Richter-Veresov attack
+rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Torre attack (Tartakower variation)
+rnbqkb1r/ppp1pppp/5n2/3p2B1/8/3P4/PPP1PPPP/RN1QKBNR b KQkq -
+Old Indian: Tartakower (Wade) variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: Anglo-Gr\"unfeld defense
+rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn game, Krause variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Marshall defense
+rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Queen's bishop game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P2P1/5P2/PPP1P2P/RNBQKBNR b KQkq -
+Gedult attack
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+Queen's pawn game, Chigorin variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/3BP3/PPP2PPP/RNBQK1NR b KQkq -
+Queen's pawn: stonewall attack
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Blackmar-Diemer gambit
+rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -
+Blackmar-Diemer gambit
+rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Alekhine's defense: Scandinavian variation
+rnbqkb1r/ppp1pppp/5n2/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+Queen's Indian defense *
+rnbqkb1r/ppp1pppp/5n2/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+King's Indian: East Indian defense *
+rnbqkb1r/ppp1pppp/5n2/3pN3/8/8/PPPPPPPP/RNBQKB1R b KQkq -
+D\"ory defense *
+rnbqkb1r/ppp1pppp/5n2/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+Old Benoni defense *
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGA, 4.Nc3
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGA, 4.e3
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Queen's gambit accepted
+rnbqkb1r/ppp1pppp/5n2/8/Q1pP4/5N2/PP2PPPP/RNB1KB1R b KQkq -
+QGA: Mannheim variation
+rnbqkb1r/ppp1pppp/8/3n4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Scandinavian: Marshall variation
+rnbqkb1r/ppp1pppp/8/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: Anglo-Gr\"unfeld defense
+rnbqkb1r/ppp1pppp/8/3np3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, Larsen variation
+rnbqkb1r/ppp1pppp/8/8/1nPP4/8/PP3PPP/RNBQKBNR w KQkq -
+Scandinavian: Kiel variation
+rnbqkb1r/ppp2Npp/3p1n2/8/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Cochrane gambit
+rnbqkb1r/ppp2p1p/5n2/3p4/4PpNP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense, Rivi\`ere variation
+rnbqkb1r/ppp2p1p/5n2/3pN3/3PPBpP/8/PPP3P1/RN1QKB1R b KQkq -
+KGA: Kieseritsky, Brentano defense
+rnbqkb1r/ppp2p1p/8/3pN3/3PnBpP/8/PPPN2P1/R2QKB1R b KQkq -
+KGA: Kieseritsky, Brentano defense, Caro variation
+rnbqkb1r/ppp2pp1/4pn1p/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD: Capablanca-Duras variation
+rnbqkb1r/ppp2pp1/5n1p/3p2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Panov variation *
+rnbqkb1r/ppp2ppp/1n6/1B2p3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch: Romanishin variation *
+rnbqkb1r/ppp2ppp/1n6/4p3/2B5/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch: Potter variation *
+rnbqkb1r/ppp2ppp/3p1n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: French attack *
+rnbqkb1r/ppp2ppp/3p1n2/4P3/4P3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich variation
+rnbqkb1r/ppp2ppp/3p1n2/4p1N1/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich, Locock variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Philidor: Nimzovich, Klein variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Old Indian: Ukrainian variation, 4.Nf3
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Old Indian: Ukrainian variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich (Jaenisch) variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+R\'eti: Lisitsin gambit deferred *
+rnbqkb1r/ppp2ppp/3p1n2/8/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Paulsen attack
+rnbqkb1r/ppp2ppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: exchange variation
+rnbqkb1r/ppp2ppp/3p1n2/8/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: classical attack, close variation
+rnbqkb1r/ppp2ppp/3p4/3QP3/4n3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Philidor: Nimzovich, Rellstab variation
+rnbqkb1r/ppp2ppp/3p4/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR w KQkq -
+Budapest: Alekhine variation, Balogh gambit
+rnbqkb1r/ppp2ppp/3p4/4P3/4n3/5N2/PPPN1PPP/R1BQKB1R b KQkq -
+Philidor: Nimzovich, Sokolsky variation
+rnbqkb1r/ppp2ppp/3p4/8/2P1n3/5N2/PP1P1PPP/RNBQKB1R b KQkq -
+Petrov: Kaufmann attack
+rnbqkb1r/ppp2ppp/3p4/8/3Pn3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: classical attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov: Nimzovich attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: French attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPPQPPP/RNB1KB1R b KQkq -
+Petrov: Cozio (Lasker) attack
+rnbqkb1r/ppp2ppp/3pp3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR w KQkq -
+Alekhine's defense: two pawns' attack, Mikenas variation
+rnbqkb1r/ppp2ppp/4n3/3pP3/8/3P1Q2/PPP3PP/RNB1KBNR w KQkq -
+Latvian: Nimzovich variation *
+rnbqkb1r/ppp2ppp/4pn2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -
+Scandinavian: Icelandic gambit
+rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+QGD: exchange variation
+rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: 4.Bg5
+rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD
+rnbqkb1r/ppp2ppp/4pn2/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -
+English: Neo-Catalan
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: Harrwitz attack
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: 4.Nf3
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: 3...Nf6
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -
+Catalan: closed
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R b KQkq -
+Queen's pawn game
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Queen's pawn game
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq -
+French: Henneberger variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French defense
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2NB4/PPP2PPP/R1BQK1NR b KQkq -
+French: Swiss variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, closed variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Yusupov-Rubinstein system *
+rnbqkb1r/ppp2ppp/4pn2/3pP3/2P5/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+English: Mikenas-Carls, Flohr variation
+rnbqkb1r/ppp2ppp/4pn2/3pP3/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Steinitz variation
+rnbqkb1r/ppp2ppp/4pn2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: Burn variation
+rnbqkb1r/ppp2ppp/4pn2/8/2p5/5NP1/PP1PPPBP/RNBQK2R w KQkq -
+English: Neo-Catalan accepted
+rnbqkb1r/ppp2ppp/4pn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA: 4...e6
+rnbqkb1r/ppp2ppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Catalan: open, 5.Nf3
+rnbqkb1r/ppp2ppp/4pn2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -
+Blackmar-Diemer: Euwe defense
+rnbqkb1r/ppp2ppp/4pn2/8/Q1pP4/6P1/PP2PPBP/RNB1K1NR b KQkq -
+Catalan: open, 5.Qa4
+rnbqkb1r/ppp2ppp/5n2/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Morphy variation
+rnbqkb1r/ppp2ppp/5n2/3Np3/4P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Scotch: Lolli variation *
+rnbqkb1r/ppp2ppp/5n2/3P4/4PP2/8/PPP3PP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 5.de
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq -
+KGD: Falkbeer, Rubinstein variation
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPP1Q1PP/RNB1KBNR b KQkq -
+KGD: Falkbeer, R\'eti variation
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPPN2PP/R1BQKBNR b KQkq -
+KGD: Falkbeer, Keres variation
+rnbqkb1r/ppp2ppp/5n2/3P4/5p2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Abbazia defense, modern variation
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Sicilian *
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/4P3/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: modern variation, 4...Bg4 *
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: exchange, positional line
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: exchange, Svenonius variation
+rnbqkb1r/ppp2ppp/5n2/3p4/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Nimzovich system *
+rnbqkb1r/ppp2ppp/5n2/3p4/3NP3/8/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Larsen variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/3Np3/3P2P1/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: modern, fianchetto variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/4p3/1N1P4/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Schmid variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: classical attack, close variation *
+rnbqkb1r/ppp2ppp/5n2/3pN3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: modern attack, Symmetrical variation *
+rnbqkb1r/ppp2ppp/5n2/3pN3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: classical attack *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen, reverse dragon
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/3P1N2/PP2PPPP/RNBQKB1R b KQkq -
+Sicilian: Cortlever (Alatortsev) variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: Marshall variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Blackmar-Diemer: Lemberg counter-gambit
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch opening *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich (Jaenisch) variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -
+Philidor's defense *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P4/PPPN1PPP/R1BQKBNR b KQkq -
+Philidor: Hanham variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern (Steinitz) attack *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR w KQkq -
+Vienna gambit
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2NP4/PPP3PP/R1BQKBNR b KQkq -
+Vienna gambit, Steinitz variation
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+Philidor: Philidor counter-gambit *
+rnbqkb1r/ppp2ppp/5n2/4p2Q/8/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Fraser attack *
+rnbqkb1r/ppp2ppp/5n2/4p3/4p3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich variation *
+rnbqkb1r/ppp2ppp/8/3P4/4nP2/8/PPP1Q1PP/RNB1KBNR b KQkq -
+KGD: Falkbeer, Charousek gambit
+rnbqkb1r/ppp2ppp/8/3n4/3p4/8/PPP2PPP/RNBQKBNR w KQkq -
+Philidor: Paulsen attack *
+rnbqkb1r/ppp2ppp/8/3np2Q/8/2N5/PPPP1PPP/R1B1KBNR b KQkq -
+Scotch: Pulling counter-attack *
+rnbqkb1r/ppp2ppp/8/3np3/2B5/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch game *
+rnbqkb1r/ppp2ppp/8/3np3/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Sicilian: Nimzovich variation *
+rnbqkb1r/ppp2ppp/8/3np3/4P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+Sicilian: Labourdonnais-L\"owenthal variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N1P3/PP1P1PPP/R1BQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Scotch: Schmidt variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch game *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N5/PPQPPPPP/R1B1KBNR b KQkq -
+Sicilian: Flohr variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P2P1/PPP2P1P/RNBQKBNR b KQkq -
+Philidor: Larsen variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P4/PPP2PPP/RNBQKBNR w KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+Sicilian: Anderssen variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/P3P3/1P1P1PPP/RNBQKBNR b KQkq -
+Sicilian: Kan variation *
+rnbqkb1r/ppp2ppp/8/3pP3/4n3/2N2Q2/PPPP2PP/R1B1KBNR b KQkq -
+Vienna gambit: Paulsen attack
+rnbqkb1r/ppp2ppp/8/3pP3/4n3/2NP4/PPP3PP/R1BQKBNR b KQkq -
+Vienna gambit
+rnbqkb1r/ppp2ppp/8/3pp3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Boden-Kieseritsky gambit: Lichtenhein defense
+rnbqkb1r/ppp2ppp/8/3pp3/4N3/8/PPPP1PPP/R1BQKBNR w KQkq -
+Irish (Chicago) gambit *
+rnbqkb1r/ppp2ppp/8/3pp3/4P1n1/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Locock variation *
+rnbqkb1r/ppp2ppp/8/4P3/3P2n1/4p3/PPP3PP/RNBQKBNR w KQkq -
+Philidor: Philidor counter-gambit, del Rio attack *
+rnbqkb1r/ppp2ppp/8/4p2Q/1n6/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Horwitz attack *
+rnbqkb1r/ppp2ppp/8/4p3/1n2P3/2NP4/PP3PPP/R1BQKBNR b KQkq -
+Sicilian: Labourdonnais-L\"owenthal (Kalashnikov) variation *
+rnbqkb1r/ppp2ppp/8/4p3/1n6/2N1P3/PP1P1PPP/R1BQKBNR w KQkq -
+Sicilian, Sz\'en (`anti-Taimanov') variation *
+rnbqkb1r/ppp2ppp/8/4p3/8/2n3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, exchange variation *
+rnbqkb1r/ppp2ppp/8/8/4p3/2P2N2/P1PP1PPP/R1BQKB1R w KQkq -
+Scotch: Mieses variation *
+rnbqkb1r/ppp3p1/8/3ppPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Thorold variation *
+rnbqkb1r/ppp3pN/3p3n/5p2/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Philidor: L\'opez counter-gambit, Jaenisch variation
+rnbqkb1r/ppp3pp/5n2/3ppP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Rosentreter gambit *
+rnbqkb1r/ppp3pp/5p2/3np3/8/3P1N2/PP2PPPP/RNBQKB1R w KQkq -
+Sicilian: Prins (Moscow) variation *
+rnbqkb1r/ppp3pp/8/3pPp2/3Pn3/2N2Q2/PPP3PP/R1B1KBNR b KQkq -
+Vienna gambit: Heyde variation
+rnbqkb1r/ppp3pp/8/3pPp2/4n3/2N2Q2/PPPP2PP/R1B1KBNR w KQkq f6
+Vienna gambit: Bardeleben variation
+rnbqkb1r/ppp3pp/8/3ppPP1/4n3/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: S\o rensen gambit *
+rnbqkb1r/pppn1ppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq -
+French: Steinitz, Gledhill attack
+rnbqkb1r/pppnpppp/4P3/3p4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Alekhine's defense: Spielmann variation
+rnbqkb1r/pppp1p1p/5n2/4N3/2B1PppP/8/PPPP2P1/RNBQK2R b KQkq -
+KGA: Kieseritsky, Berlin defense, 6.Bc4
+rnbqkb1r/pppp1p1p/5n2/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense
+rnbqkb1r/pppp1p1p/5n2/6N1/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Allgaier, Schlechter defense
+rnbqkb1r/pppp1p1p/5np1/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen system with ...g6
+rnbqkb1r/pppp1p1p/5np1/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Konstantinopolsky opening *
+rnbqkb1r/pppp1ppp/2n5/8/2P1PP2/8/PP4PP/RNBQKBNR w KQkq -
+Budapest: Alekhine, Abonyi variation
+rnbqkb1r/pppp1ppp/4p3/8/2PPn3/5N2/PP2PPPP/RNBQKB1R w KQkq -
+D\"ory defense
+rnbqkb1r/pppp1ppp/4pn2/6B1/2PP4/8/PP2PPPP/RN1QKBNR b KQkq -
+Neo-Indian (Seirawan) attack
+rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Queen's pawn: Torre attack
+rnbqkb1r/pppp1ppp/4pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+English: Mikenas-Carls variation
+rnbqkb1r/pppp1ppp/4pn2/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English opening
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+Catalan opening
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkb1r/pppp1ppp/4pn2/8/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn: Yusupov-Rubinstein system
+rnbqkb1r/pppp1ppp/5n2/4p1B1/8/3P4/PPP1PPPP/RN1QKBNR b KQkq -
+R\'eti: Wade defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Vienna game
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Petrov: Italian variation
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Berlin defense
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq -
+Bishop's opening: Greco gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Ponziani gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/1P6/P2PPPPP/RNBQKBNR b KQkq -
+Sicilian: Katalimov variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: Carls' Bremen system
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English opening
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Sicilian *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/4P3/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Sicilian: Nimzovich-Rubinstein variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/6P1/PP1PPP1P/RNBQKBNR b KQkq -
+Sicilian: Hungarian variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/8/PPQPPPPP/RNB1KBNR b KQkq -
+Sicilian: Quinteros variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/P7/1P1PPPPP/RNBQKBNR b KQkq -
+Sicilian: O'Kelly variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest defense declined
+rnbqkb1r/pppp1ppp/5n2/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Tennison (Lemberg, Zukertort) gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: modern (Steinitz) attack
+rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+QP counter-gambit (elephant gambit) *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov three knights game
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Vienna: Paulsen-Mieses variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+King's pawn game *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Falkbeer variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Philidor's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov's defense
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq -
+Damiano's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+Greco defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's knight opening *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+Gunderam defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/P1N5/1PPP1PPP/R1BQKBNR b KQkq -
+Vienna: Mengarini variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Vienna gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Latvian counter-gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: 2...Nf6
+rnbqkb1r/pppp1ppp/5n2/4p3/5P2/2N5/PPPPP1PP/R1BQKBNR b KQkq -
+KP: Colorado counter *
+rnbqkb1r/pppp1ppp/5n2/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+R\'eti: Pirc-Lisitsin gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/Q1P5/8/PP1PPPPP/RNB1KBNR b KQkq -
+Sicilian: Stiletto (Althouse) variation *
+rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+KGA: bishop's gambit, Bogolyubov variation
+rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Cozio (Morphy) defense
+rnbqkb1r/pppp1ppp/5n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Bishop's opening/Petrov: Urusov gambit
+rnbqkb1r/pppp1ppp/5n2/8/3pP3/3B4/PPP2PPP/RNBQK1NR b KQkq -
+QP counter-gambit: Maroczy gambit *
+rnbqkb1r/pppp1ppp/5n2/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Schallop defense
+rnbqkb1r/pppp1ppp/8/2n1p3/8/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Paulsen attack *
+rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Damiano variation *
+rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: Damiano variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR b KQkq -
+Budapest: Alekhine variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest: Fajarowicz variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PPQ1PPPP/RNB1KBNR b KQkq -
+Budapest: Fajarowicz, Steiner variation
+rnbqkb1r/pppp1ppp/8/4P3/2P2Bn1/8/PP2PPPP/RN1QKBNR b KQkq -
+Budapest: Rubinstein variation
+rnbqkb1r/pppp1ppp/8/4P3/2P3n1/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Budapest: Adler variation
+rnbqkb1r/pppp1ppp/8/4P3/2P3n1/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest defense
+rnbqkb1r/pppp1ppp/8/4P3/3Qn3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Petrov: modern attack, main line
+rnbqkb1r/pppp1ppp/8/4P3/3pn3/5N2/PPP1QPPP/RNB1KB1R b KQkq -
+Petrov: modern attack, Steinitz variation
+rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Boden-Kieseritsky gambit
+rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Vienna game
+rnbqkb1r/pppp1ppp/8/4p3/3Pn3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, Symmetrical variation
+rnbqkb1r/pppp1ppp/8/4p3/4nP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Latvian: Fraser defense *
+rnbqkb1r/pppp1ppp/8/4p3/8/3P1N2/PPP2nPP/RNBQKB1R w KQkq -
+Petrov: Cochrane gambit *
+rnbqkb1r/pppp2p1/5n2/4pP1p/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+King's knight's gambit *
+rnbqkb1r/pppp2p1/8/4pPPp/3Pn3/8/PPP2P1P/RNBQKBNR b KQkq -
+KGA: Kieseritsky, Brentano (Campbell) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n2P/8/PPPP1P2/RNBQKBNR b KQkq -
+KGA: Kieseritsky, long whip (Stockwhip, classical) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+KGA: Kieseritsky, Neumann defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/3P4/PPP2P1P/RNBQKBNR b KQkq -
+KGA: Kieseritsky, Kolisch defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/5N2/PPPP1P1P/RNBQKB1R b KQkq -
+KGA: Kieseritsky, Berlin defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPP1PBP/RNBQK1NR b KQkq -
+KGA: Kieseritsky, Paulsen defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPPBP1P/RNBQK1NR b KQkq -
+KGA: Kieseritsky, Polerio defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPPQP1P/RNB1KBNR b KQkq -
+KGA: Kieseritsky, Salvio (Rosenthal) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/6n1/5N2/PPPP1P1P/RNBQKB1R b KQkq -
+KGA: Allgaier, Schlechter defense *
+rnbqkb1r/pppp2p1/8/4pPPp/6n1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Allgaier gambit *
+rnbqkb1r/pppp2p1/8/4pPnp/3P4/5N2/PPP2P1P/RNBQKB1R b KQkq -
+KGA: Kieseritsky, Berlin defense, Rivi\`ere variation *
+rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Bird's opening: Lasker variation *
+rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -
+Dutch defense
+rnbqkb1r/pppp2pp/4pn2/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -
+Dutch defense, Blackburne variation
+rnbqkb1r/pppp2pp/5n2/4N3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -
+Latvian: corkscrew counter-gambit
+rnbqkb1r/pppp2pp/5n2/4p3/2B1p3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, Soldatenkov variation *
+rnbqkb1r/pppp2pp/5n2/4pP2/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGA: Abbazia defense (classical defense, modern defense[!]) *
+rnbqkb1r/pppp2pp/5n2/4pP2/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGA: Gianutio counter-gambit *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/3P4/PPP2PPP/RNBQKBNR b KQkq -
+KGA: Fischer defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGA: Schallop defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/7P/PPPP1PP1/RNBQKBNR b KQkq -
+KGA: Becker defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's knight's gambit *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPPBPPP/RNBQK1NR b KQkq -
+KGA: Cunningham defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPPNPPP/RNBQKB1R b KQkq -
+KGA: Bonsch-Osmolovsky variation *
+rnbqkb1r/pppp2pp/5n2/4pp2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Tartakower variation *
+rnbqkb1r/pppp2pp/5n2/5P2/3p4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+KGA: Abbazia defense, modern variation *
+rnbqkb1r/ppppnppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Keres variation (2.Ne2) *
+rnbqkb1r/ppppnppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alapin's opening *
+rnbqkb1r/ppppnppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Steinitz defense
+rnbqkb1r/ppppnppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Bonsch-Osmolovsky variation
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Dutch with c4 & Nc3
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+Dutch with c4 & g3
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Dutch defense
+rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/2N5/PPP1PP1P/R1BQKBNR b KQkq -
+Dutch, Spielmann gambit
+rnbqkb1r/ppppp1pp/5n2/5p2/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+R\'eti: Lisitsin gambit deferred
+rnbqkb1r/ppppp1pp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Staunton's line
+rnbqkb1r/ppppp1pp/5n2/8/3Pp1P1/2N5/PPP2P1P/R1BQKBNR b KQkq -
+Dutch: Staunton gambit, Tartakower variation
+rnbqkb1r/ppppp1pp/5n2/8/4pPP1/2N5/PPPP3P/R1BQKBNR b KQkq -
+Bird's opening, Swiss gambit
+rnbqkb1r/ppppp1pp/5n2/8/6P1/3B4/PPP2P1P/RNBQK1NR b KQkq -
+Bird: From gambit, Lasker variation *
+rnbqkb1r/ppppp2p/5np1/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -
+Dutch: Leningrad variation
+rnbqkb1r/ppppp2p/5np1/5p2/3P4/6P1/PPP1PPBP/RNBQK1NR w KQkq -
+Dutch defense
+rnbqkb1r/ppppp2p/5np1/6B1/3Pp2P/2N5/PPP2PP1/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Alekhine variation
+rnbqkb1r/ppppp2p/5np1/6B1/3Pp3/2N2P2/PPP3PP/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Lasker variation
+rnbqkb1r/ppppp2p/5ppn/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -
+Hippopotamus defense
+rnbqkb1r/ppppp2p/6pn/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Dutch defense: Bladel variation
+rnbqkb1r/pppppp1p/5np1/3P4/2P5/8/PP2PPPP/RNBQKBNR b KQkq -
+King's Indian: Anti-Gr\"unfeld
+rnbqkb1r/pppppp1p/5np1/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+King's Indian: Torre attack
+rnbqkb1r/pppppp1p/5np1/8/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack, Spassky's variation *
+rnbqkb1r/pppppp1p/5np1/8/1P6/5NP1/P1PPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack, R\'eti-Smyslov variation
+rnbqkb1r/pppppp1p/5np1/8/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+King's Indian defense, 3.Nc3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+King's Indian, 3.Nf3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+King's Indian: 3.g3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+R\'eti: King's Indian attack (with ...c5) *
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+King's Indian defense
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PPQ1PPPP/RNB1KBNR b KQkq -
+Queen's pawn: Mengarini attack
+rnbqkb1r/pppppp1p/5np1/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+King's Indian: London system
+rnbqkb1r/pppppp1p/5np1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+King's Indian: East Indian defense
+rnbqkb1r/pppppp1p/5np1/8/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+King's Indian: fianchetto without c4
+rnbqkb1r/pppppp1p/5np1/8/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -
+R\'eti: King's Indian attack *
+rnbqkb1r/pppppp1p/5np1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: King's Indian attack (Barcza system) *
+rnbqkb1r/pppppp1p/5np1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Benko's opening: reversed Alekhine *
+rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack *
+rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack
+rnbqkb1r/ppppppnp/6p1/4P3/3P2P1/8/PPP2P1P/RNBQKBNR w KQkq -
+Norwegian defense
+rnbqkb1r/pppppppp/1n6/2P1P3/8/8/PP1P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: two pawns' (Lasker's) attack
+rnbqkb1r/pppppppp/1n6/4P3/2P5/1P6/P2P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Steiner variation
+rnbqkb1r/pppppppp/5n2/6B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Trompovsky attack (Ruth, Opo\v censk\'y opening)
+rnbqkb1r/pppppppp/5n2/8/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -
+English orang-utan
+rnbqkb1r/pppppppp/5n2/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Krejcik variation
+rnbqkb1r/pppppppp/5n2/8/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English opening
+rnbqkb1r/pppppppp/5n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+English opening
+rnbqkb1r/pppppppp/5n2/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English, 1...Nf6 (Anglo-Indian defense)
+rnbqkb1r/pppppppp/5n2/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn: London system
+rnbqkb1r/pppppppp/5n2/8/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq -
+Canard opening
+rnbqkb1r/pppppppp/5n2/8/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -
+Queen's pawn: Bronstein gambit
+rnbqkb1r/pppppppp/5n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/3P4/5P2/PPP1P1PP/RNBQKBNR b KQkq -
+Paleface attack
+rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Mar\'oczy variation
+rnbqkb1r/pppppppp/5n2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/5n2/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+R\'eti v Dutch *
+rnbqkb1r/pppppppp/5n2/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+R\'eti: Herrstr\"om gambit *
+rnbqkb1r/pppppppp/5n2/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Indian variation
+rnbqkb1r/pppppppp/5n2/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkb1r/pppppppp/5n2/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/7n/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -
+Polish: T\"ubingen variation
+rnbqkb1r/pppppppp/7n/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Amar (Paris) opening *
+rnbqkb1r/pppppppp/8/3nP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/3nP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/3nP3/8/1P6/P1PP1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Welling variation
+rnbqkb1r/pppppppp/8/3nP3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Alekhine's defense: S\"amisch attack
+rnbqkb1r/pppppppp/8/3nP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/4P3/4n3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense: Mokele Mbembe (B\"ucker) variation
+rnbqkb1r/pppppppp/8/8/3Pn3/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+D\"ory defense
+rnbqkbnr/1p1p1p1p/p3p1p1/8/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -
+Sicilian: Kan, Swiss cheese variation
+rnbqkbnr/1p1p1ppp/p3p3/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Kan, Mar\'oczy bind (R\'eti variation)
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Kan, 5.Nc3
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R b KQkq -
+Sicilian: Kan, 5.Bd3
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Kan variation
+rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: O'Kelly variation
+rnbqkbnr/1pp1pppp/p7/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGA: Alekhine defense
+rnbqkbnr/1pp1pppp/p7/8/2pPP3/5N2/PP3PPP/RNBQKB1R b KQkq -
+QGA: Alekhine defense, Borisenko-Furman variation
+rnbqkbnr/1pp2ppp/p3p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Janowski variation
+rnbqkbnr/1ppp1ppp/p3p3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+St. George defense
+rnbqkbnr/1ppp1ppp/p7/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Mengarini's opening *
+rnbqkbnr/1pppppp1/8/p6p/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Crab opening *
+rnbqkbnr/1pppppp1/p6p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Global opening *
+rnbqkbnr/1ppppppp/8/p7/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Corn stalk defense
+rnbqkbnr/1ppppppp/8/p7/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Ware (Meadow Hay) opening *
+rnbqkbnr/1ppppppp/p7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+St. George (Baker) defense
+rnbqkbnr/1ppppppp/p7/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Anderssen's opening *
+rnbqkbnr/2p1pppp/p7/1p6/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA: Haberditz variation
+rnbqkbnr/2pp1ppp/P7/4p3/8/8/PP1PPPPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit, Carlsbad variation *
+rnbqkbnr/2pp1ppp/p7/1P2p3/8/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit, Marshall variation *
+rnbqkbnr/p1p1pppp/8/1p6/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGA: Ericson variation
+rnbqkbnr/p1p2ppp/1p2p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Alapin variation
+rnbqkbnr/p1pp1ppp/1p2p3/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Keres defense
+rnbqkbnr/p1pp1ppp/1p6/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: R\'eti (Spielmann) variation *
+rnbqkbnr/p1pp1ppp/1p6/8/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Welling variation *
+rnbqkbnr/p1pp1ppp/8/1p2p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit *
+rnbqkbnr/p1pp1ppp/8/1p6/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Bryan counter-gambit
+rnbqkbnr/p1pp2pp/1p6/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Orsini gambit *
+rnbqkbnr/p1pppppp/1p6/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: Polish variation *
+rnbqkbnr/p1pppppp/1p6/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: English variation *
+rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: classical variation *
+rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: English defense
+rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: modern variation *
+rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Owen defense
+rnbqkbnr/p1pppppp/1p6/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: Dutch variation *
+rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: symmetrical variation *
+rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: symmetrical variation
+rnbqkbnr/p1pppppp/1p6/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Nimzovich-Larsen attack: Indian variation *
+rnbqkbnr/p1pppppp/1p6/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack *
+rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Jaenisch gambit
+rnbqkbnr/p1pppppp/8/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Polish defense
+rnbqkbnr/p1pppppp/8/1p6/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Polish variation
+rnbqkbnr/p1pppppp/8/1p6/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Polish: Outflank variation *
+rnbqkbnr/p1pppppp/8/1p6/8/7N/PPPPPPPP/RNBQKB1R b KQkq -
+Polish: T\"ubingen variation *
+rnbqkbnr/p1pppppp/8/1p6/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Polish (Sokolsky) opening *
+rnbqkbnr/p2p1ppp/1p6/2p5/4p3/1N6/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Steiner variation *
+rnbqkbnr/p2p1ppp/8/1Pp1p3/8/8/PP1PPPPP/RNBQKBNR w KQkq c6
+Sicilian: wing gambit, Santasiere variation *
+rnbqkbnr/p2p1ppp/8/1pp5/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Center game, Kieseritsky variation
+rnbqkbnr/p2ppppp/1p6/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Katalimov variation
+rnbqkbnr/p2ppppp/8/1pp5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English orang-utan *
+rnbqkbnr/p3pppp/2p5/1p1p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Gurgenidze counter-attack
+rnbqkbnr/p4ppp/2p5/3pp3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense, Wheeler gambit *
+rnbqkbnr/p4ppp/8/1pP5/N2p4/8/PP2PPPP/R1BQKBNR w KQkq b6
+QGD: Tarrasch defense, Tarrasch gambit
+rnbqkbnr/pp1p1ppp/2p5/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Philidor counter-attack
+rnbqkbnr/pp1p1ppp/2p5/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Alapin's variation (2.c3) *
+rnbqkbnr/pp1p1ppp/2p5/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Lopez opening *
+rnbqkbnr/pp1p1ppp/2p5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Ruy L\'opez defense
+rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian defense
+rnbqkbnr/pp1p1ppp/4p3/2pP4/4P3/8/PPP2PPP/RNBQKBNR b KQkq -
+Old Benoni: Franco-Benoni defense
+rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+rnbqkbnr/pp1p1ppp/8/2p1p3/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+Caro-Kann: anti-anti-Caro-Kann defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -
+English: Adorjan defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Mafia defense
+rnbqkbnr/pp1p1ppp/8/2p1p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: anti-Caro-Kann defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense, Steiner variation *
+rnbqkbnr/pp1p1ppp/8/2p5/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/pp1p1ppp/8/2p5/3p4/2P2N2/PP2PPPP/RNBQKB1R b KQkq -
+Scandinavian gambit *
+rnbqkbnr/pp1p1ppp/8/2p5/3p4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Scandinavian: Icelandic gambit *
+rnbqkbnr/pp1p1ppp/8/2pPp3/8/8/PPP1PPPP/RNBQKBNR w KQkq e6
+Old Benoni defense
+rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Andreaschek gambit
+rnbqkbnr/pp1p1ppp/8/8/2p1p3/1N6/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: two pawns' (Lasker's) attack *
+rnbqkbnr/pp1pp1pp/8/2p2p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Mujannah opening *
+rnbqkbnr/pp1pp1pp/8/2pP1p2/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni: Mujannah formation
+rnbqkbnr/pp1ppp1p/6p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Hungarian variation
+rnbqkbnr/pp1ppppp/2p5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -
+Polish: Outflank variation
+rnbqkbnr/pp1ppppp/2p5/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Caro-Kann: Hillbilly attack
+rnbqkbnr/pp1ppppp/2p5/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+Caro-Kann: anti-Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Caro-Kann defensive system
+rnbqkbnr/pp1ppppp/2p5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: closed (Breyer) variation
+rnbqkbnr/pp1ppppp/2p5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Saragossa opening *
+rnbqkbnr/pp1ppppp/8/2p5/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit
+rnbqkbnr/pp1ppppp/8/2p5/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+English: Jaenisch gambit *
+rnbqkbnr/pp1ppppp/8/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English: symmetrical variation
+rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+English: symmetrical variation *
+rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: symmetrical variation
+rnbqkbnr/pp1ppppp/8/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkbnr/pp1ppppp/8/2p5/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Sicilian: Smith-Morra gambit
+rnbqkbnr/pp1ppppp/8/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Sicilian: closed
+rnbqkbnr/pp1ppppp/8/2p5/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian: Alapin's variation (2.c3)
+rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Sicilian defense
+rnbqkbnr/pp1ppppp/8/2p5/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -
+Sicilian: Steinitz variation
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Sicilian defense
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -
+Sicilian: Keres variation (2.Ne2)
+rnbqkbnr/pp1ppppp/8/2p5/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Sicilian: Grand Prix attack
+rnbqkbnr/pp1ppppp/8/2p5/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+English: Anglo-Dutch defense *
+rnbqkbnr/pp1ppppp/8/2p5/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: English variation
+rnbqkbnr/pp1ppppp/8/2p5/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+English: Caro-Kann defensive system *
+rnbqkbnr/pp1ppppp/8/2p5/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+English, 1...Nf6 (Anglo-Indian defense) *
+rnbqkbnr/pp1ppppp/8/2p5/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/8/1p2P3/P7/2PP1PPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit, Marshall variation
+rnbqkbnr/pp1ppppp/8/8/1pP1P3/8/P2P1PPP/RNBQKBNR b KQkq c3
+Sicilian: wing gambit, Santasiere variation
+rnbqkbnr/pp1ppppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: Smith-Morra gambit
+rnbqkbnr/pp1ppppp/8/8/4P3/p7/2PP1PPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit, Carlsbad variation
+rnbqkbnr/pp2p1pp/5p2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld defense *
+rnbqkbnr/pp2pp1p/2p3p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Gurgenidze system
+rnbqkbnr/pp2pp1p/3p2p1/2pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Old Benoni: Schmid's system
+rnbqkbnr/pp2pp1p/6p1/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld (Kemeri) defense *
+rnbqkbnr/pp2pp1p/6p1/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch with c4 & g3 *
+rnbqkbnr/pp2pp1p/6p1/2pp4/5P2/5NP1/PPPPP2P/RNBQKB1R b KQkq -
+Dutch: Leningrad variation *
+rnbqkbnr/pp2pp1p/6p1/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Catalan opening *
+rnbqkbnr/pp2pp1p/6p1/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: 3.g3 *
+rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PP2PPPP/RNBQKBNR b KQkq -
+QGD Slav defense: exchange variation
+rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: exchange variation
+rnbqkbnr/pp2pppp/2p5/3p2P1/8/8/PPPPPPBP/RNBQK1NR b KQkq -
+Grob: spike attack
+rnbqkbnr/pp2pppp/2p5/3p4/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+Caro-Kann: anti-anti-Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/2P5/1P3N2/P2PPPPP/RNBQKB1R b KQkq -
+English: Caro-Kann defensive system
+rnbqkbnr/pp2pppp/2p5/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav: 3.Nf3
+rnbqkbnr/pp2pppp/2p5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -
+Caro-Kann: Tartakower (fantasy) variation
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -
+Caro-Kann: 3.Nd2
+rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Caro-Kann: two knights variation
+rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2Q2/PPPP1PPP/R1B1KBNR b KQkq -
+Caro-Kann: Goldman (Spielmann) variation
+rnbqkbnr/pp2pppp/2p5/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: advance variation
+rnbqkbnr/pp2pppp/2p5/8/2pPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD Slav defense, Alekhine variation
+rnbqkbnr/pp2pppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+Caro-Kann: Rasa-Studier gambit
+rnbqkbnr/pp2pppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Sicilian: Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack
+rnbqkbnr/pp2pppp/3p4/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+Sicilian: wing gambit deferred
+rnbqkbnr/pp2pppp/3p4/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/3p4/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkbnr/pp2pppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Sicilian, Chekhover variation
+rnbqkbnr/pp2pppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Tartakower variation
+rnbqkbnr/pp2pppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/8/1Bpp4/8/4P3/PPPP1PPP/RNBQK1NR b KQkq -
+Queen's pawn: Franco-Indian (Keres) defense *
+rnbqkbnr/pp2pppp/8/2Pp4/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's gambit accepted *
+rnbqkbnr/pp2pppp/8/2p1N3/2Pp4/8/PP1PPPPP/RNBQKB1R b KQkq -
+Vulture defense *
+rnbqkbnr/pp2pppp/8/2p1N3/4p3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest: Fajarowicz variation *
+rnbqkbnr/pp2pppp/8/2p3N1/4p3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest defense *
+rnbqkbnr/pp2pppp/8/2p5/1P1p4/5NP1/P1PPPP1P/RNBQKB1R b KQkq -
+King's Indian: Danube gambit *
+rnbqkbnr/pp2pppp/8/2p5/1PPp4/5N2/P2PPPPP/RNBQKB1R b KQkq -
+Benk\"o gambit *
+rnbqkbnr/pp2pppp/8/2p5/2Pp4/3P1N2/PP2PPPP/RNBQKB1R b KQkq -
+Benoni defense, Hromodka system *
+rnbqkbnr/pp2pppp/8/2p5/2Pp4/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+Benoni defense *
+rnbqkbnr/pp2pppp/8/2p5/2PpP3/5N2/PP1P1PPP/RNBQKB1R b KQkq e3
+Czech Benoni defense *
+rnbqkbnr/pp2pppp/8/2p5/3p4/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: Anti-Gr\"unfeld *
+rnbqkbnr/pp2pppp/8/2pp4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Benoni defense *
+rnbqkbnr/pp2pppp/8/2pp4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+QGD: symmetrical (Austrian) defense *
+rnbqkbnr/pp2pppp/8/2pp4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: symmetrical (Austrian) defense
+rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+QGD: Grau (Sahovic) defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR w KQkq -
+Queen's pawn, Mason variation, Steinitz counter-gambit
+rnbqkbnr/pp2pppp/8/2pp4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+QGD: Chigorin defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+QGD Slav defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+Queen's gambit declined *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+QGD: Marshall defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game, Krause variation
+rnbqkbnr/pp2pppp/8/2pp4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's gambit declined *
+rnbqkbnr/pp2pppp/8/2pp4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+QGD: Albin counter-gambit *
+rnbqkbnr/pp2pppp/8/2pp4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest defense declined *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/4P3/PPPP2PP/RNBQKBNR b KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R b KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/1P2P3/P1PP1PPP/RNBQKBNR b KQkq -
+Queen's pawn: Keres defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+Queen's Indian accelerated *
+rnbqkbnr/pp2pppp/8/2pp4/8/2N2N2/PPPPPPPP/R1BQKB1R b KQkq -
+Kevitz-Trajkovich defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+Old Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -
+Old Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkbnr/pp2pppp/8/2pp4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+King's Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack (with ...c5)
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPPBP/RNBQK2R b KQkq -
+R\'eti: King's Indian attack
+rnbqkbnr/pp2pppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik attack
+rnbqkbnr/pp2pppp/8/3p4/3p4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense: exchange variation *
+rnbqkbnr/pp2pppp/8/8/1pPp4/P4N2/3PPPPP/RNBQKB1R b KQkq -
+Benk\"o gambit half accepted *
+rnbqkbnr/pp2pppp/8/8/2Pp4/p4N2/3PPPPP/RNBQKB1R w KQkq -
+Benk\"o gambit accepted *
+rnbqkbnr/pp3ppp/2p1p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -
+English: Kurajica defense
+rnbqkbnr/pp3ppp/2p1p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: semi-Slav
+rnbqkbnr/pp3ppp/2p1p3/3p4/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: semi-Slav, Marshall gambit
+rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: semi-Slav, Noteboom variation
+rnbqkbnr/pp3ppp/2p5/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Anderssen variation
+rnbqkbnr/pp3ppp/2p5/3Pp3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Danish gambit: S\o rensen defense *
+rnbqkbnr/pp3ppp/2p5/3Pp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Nimzovich counter-gambit
+rnbqkbnr/pp3ppp/2p5/3Pp3/8/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Smith-Morra gambit *
+rnbqkbnr/pp3ppp/2p5/3Pp3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Danish gambit *
+rnbqkbnr/pp3ppp/2p5/3p4/2PPp3/2N1P3/PP3PPP/R1BQKBNR b KQkq -
+French: advance variation *
+rnbqkbnr/pp3ppp/2p5/3p4/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance variation *
+rnbqkbnr/pp3ppp/2p5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD Slav: Winawer counter-gambit
+rnbqkbnr/pp3ppp/2pp4/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English, Keres variation
+rnbqkbnr/pp3ppp/3p4/2pPp3/4P3/8/PPP2PPP/RNBQKBNR w KQkq -
+Semi-Benoni (`blockade variation')
+rnbqkbnr/pp3ppp/4p3/2PpP3/8/8/PPP2PPP/RNBQKBNR b KQkq -
+French: advance, Steinitz variation
+rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch defense
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Marshall variation
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Marshall variation
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, open variation
+rnbqkbnr/pp3ppp/4p3/2pp4/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -
+Sicilian: closed, Korchnoi variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/1P6/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+French: Wing gambit
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P2Q1/8/PPP2PPP/RNB1KBNR b KQkq -
+French: advance, Nimzovich variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR b KQkq -
+French: advance variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+French: advance, Nimzovich system
+rnbqkbnr/pp3ppp/4p3/3P4/3p4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, von Hennig-Schara gambit
+rnbqkbnr/pp3ppp/4p3/8/2Bp4/5N2/PPPN1PPP/R1BQK2R w KQkq -
+French: Tarrasch, Eliskases variation
+rnbqkbnr/pp3ppp/8/1Npp4/8/8/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian: Kiel variation *
+rnbqkbnr/pp3ppp/8/2Ppp3/5P2/8/PPP1P1PP/RNBQKBNR b KQkq -
+QGA: Schwartz defense *
+rnbqkbnr/pp3ppp/8/2Ppp3/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+QGA: 3.e4 *
+rnbqkbnr/pp3ppp/8/2p1p1N1/4p3/3P4/PPP2PPP/RNBQKB1R b KQkq -
+Budapest: Alekhine variation, Balogh gambit *
+rnbqkbnr/pp3ppp/8/2p1p1N1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Alekhine variation *
+rnbqkbnr/pp3ppp/8/2pp4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/pp3ppp/8/2pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Tarrasch defense
+rnbqkbnr/pp3ppp/8/2pp4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch defense, 4.cd ed
+rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack *
+rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, open, 4.ed ed
+rnbqkbnr/pp3ppp/8/2pp4/3PP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: Tarrasch defense, Marshall gambit
+rnbqkbnr/pp3ppp/8/2pp4/8/1N1p4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: exchange variation *
+rnbqkbnr/pp3ppp/8/2ppp3/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit deferred *
+rnbqkbnr/pp3ppp/8/2ppp3/8/5PPN/PPPPP2P/RNBQKB1R b KQkq -
+Hippopotamus defense *
+rnbqkbnr/pp3ppp/8/3p4/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Panov-Botvinnik, Gunderam attack *
+rnbqkbnr/pp4pp/8/2p1pp2/8/2N5/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest: Alekhine, Abonyi variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p1P1/1N1P4/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, Planinc variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p3/1N1P2P1/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, fianchetto variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p3/1N1P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: four pawns attack *
+rnbqkbnr/pp4pp/8/2pp1p2/4pB2/1N1P4/PPP1PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: four pawns attack, Trifunovi\'c variation *
+rnbqkbnr/pp4pp/8/2pp4/4p3/1NN5/PPP1PPPP/R1BQKB1R b KQkq -
+Alekhine's defense: four pawns attack, 6...Nc6 *
+rnbqkbnr/ppp1p1pp/3p4/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+(Dutch:) Balogh defense
+rnbqkbnr/ppp1p1pp/5p2/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Paleface attack *
+rnbqkbnr/ppp1p1pp/8/3p1p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Canard opening *
+rnbqkbnr/ppp1p1pp/8/5p2/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -
+QGA: Schwartz defense
+rnbqkbnr/ppp1p2p/5p2/3p2p1/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Gedult attack *
+rnbqkbnr/ppp1pp1p/6p1/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch defense *
+rnbqkbnr/ppp1pp1p/6p1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack
+rnbqkbnr/ppp1pp1p/8/3p2p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Krejcik gambit *
+rnbqkbnr/ppp1pp1p/8/3p2p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn: Bronstein gambit *
+rnbqkbnr/ppp1ppp1/7p/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Korchnoi attack *
+rnbqkbnr/ppp1pppp/3p4/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Old Indian defense
+rnbqkbnr/ppp1pppp/3p4/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's Pawn
+rnbqkbnr/ppp1pppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Mieses opening *
+rnbqkbnr/ppp1pppp/3p4/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/3p4/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Mieses opening *
+rnbqkbnr/ppp1pppp/8/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Levitsky attack (Queen's bishop attack)
+rnbqkbnr/ppp1pppp/8/3p4/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -
+Santasiere's folly
+rnbqkbnr/ppp1pppp/8/3p4/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Polish defense *
+rnbqkbnr/ppp1pppp/8/3p4/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -
+Mujannah opening
+rnbqkbnr/ppp1pppp/8/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/8/3p4/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's gambit declined
+rnbqkbnr/ppp1pppp/8/3p4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn, Mason variation
+rnbqkbnr/ppp1pppp/8/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+Queen's pawn: Chigorin variation
+rnbqkbnr/ppp1pppp/8/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's pawn game *
+rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkbnr/ppp1pppp/8/3p4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Blackmar gambit
+rnbqkbnr/ppp1pppp/8/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Tennison (Lemberg, Zukertort) gambit
+rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Queen's pawn: Charlick (Englund) gambit *
+rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Scandinavian (center counter) defense
+rnbqkbnr/ppp1pppp/8/3p4/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Bird's opening: Williams gambit
+rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Dutch *
+rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird's opening
+rnbqkbnr/ppp1pppp/8/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+R\'eti: Nimzovich-Larsen attack
+rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Queen's pawn: English defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: classical variation
+rnbqkbnr/ppp1pppp/8/3p4/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+Queen's pawn: Lundin (Kevitz-Mikenas) defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+R\'eti: old Indian attack
+rnbqkbnr/ppp1pppp/8/3p4/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's Pawn *
+rnbqkbnr/ppp1pppp/8/3p4/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+Queen's pawn *
+rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/8/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack (Barcza system)
+rnbqkbnr/ppp1pppp/8/3p4/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Modern defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Queen's pawn *
+rnbqkbnr/ppp1pppp/8/8/2Pp1P2/8/PP1PP1PP/RNBQKBNR b KQkq -
+Old Benoni: Mujannah formation *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+R\'eti: advance variation
+rnbqkbnr/ppp1pppp/8/8/2PpP3/8/PP1P1PPP/RNBQKBNR b KQkq e3
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2p5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+R\'eti accepted
+rnbqkbnr/ppp1pppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGA: 3.Nf3
+rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's gambit accepted
+rnbqkbnr/ppp1pppp/8/8/2pPP3/8/PP3PPP/RNBQKBNR b KQkq -
+QGA: 3.e4
+rnbqkbnr/ppp2p1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Larsen variation
+rnbqkbnr/ppp2p1p/3p4/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Kolisch defense
+rnbqkbnr/ppp2p1p/8/3p2p1/4p3/6P1/PPPPPPNP/RNBQKB1R b KQkq -
+Norwegian defense *
+rnbqkbnr/ppp2p1p/8/3p4/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -
+KGA: Muzio gambit, Brentano defense
+rnbqkbnr/ppp2p1p/8/3pN3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano (Campbell) defense
+rnbqkbnr/ppp2ppp/3p4/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English opening
+rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor's defense
+rnbqkbnr/ppp2ppp/3p4/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Philidor's defense
+rnbqkbnr/ppp2ppp/3p4/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Indian opening *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: closed (Breyer) variation *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: King's Indian attack *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Mar\'oczy variation *
+rnbqkbnr/ppp2ppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: exchange variation
+rnbqkbnr/ppp2ppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: exchange variation
+rnbqkbnr/ppp2ppp/3p4/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Fischer defense
+rnbqkbnr/ppp2ppp/3pp3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Lengfellner system
+rnbqkbnr/ppp2ppp/4p3/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+French: exchange variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English opening: Agincourt variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R b KQkq -
+English opening: Agincourt variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+QGD: 3.Nc3
+rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's gambit declined
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Paulsen variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq -
+French: Schlechter variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq -
+French: Alapin variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+French defense
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -
+French: Tarrasch
+rnbqkbnr/ppp2ppp/4p3/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+French: Two knights variation
+rnbqkbnr/ppp2ppp/4p3/3p4/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+French: Pelikan variation
+rnbqkbnr/ppp2ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+French: advance variation
+rnbqkbnr/ppp2ppp/4p3/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Rubinstein variation
+rnbqkbnr/ppp2ppp/8/1B1P4/4pP2/8/PPPP2PP/RNBQK1NR b KQkq -
+KGD: Falkbeer, Nimzovich variation
+rnbqkbnr/ppp2ppp/8/3P4/3N4/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Paulsen attack
+rnbqkbnr/ppp2ppp/8/3P4/4pP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 4.d3
+rnbqkbnr/ppp2ppp/8/3P4/4pP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Falkbeer, 3...e4
+rnbqkbnr/ppp2ppp/8/3Pp3/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGD: Falkbeer counter-gambit
+rnbqkbnr/ppp2ppp/8/3Pp3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+Center game *
+rnbqkbnr/ppp2ppp/8/3p4/1P1Np3/8/P1PPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense: O'Sullivan gambit *
+rnbqkbnr/ppp2ppp/8/3p4/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -
+Danish gambit: Schlechter defense
+rnbqkbnr/ppp2ppp/8/3p4/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Bledow variation
+rnbqkbnr/ppp2ppp/8/3p4/3N4/8/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian: Marshall variation *
+rnbqkbnr/ppp2ppp/8/3p4/3Np3/3P4/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/ppp2ppp/8/3p4/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/ppp2ppp/8/3p4/3Pp3/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: advance variation *
+rnbqkbnr/ppp2ppp/8/3p4/3Pp3/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: advance variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: exchange variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: exchange variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Scandinavian defense *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Scandinavian: Richter variation *
+rnbqkbnr/ppp2ppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -
+Danish gambit: S\o rensen defense
+rnbqkbnr/ppp2ppp/8/3p4/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Abbazia defense (classical defense, modern defense[!])
+rnbqkbnr/ppp2ppp/8/3pP3/8/8/PPPPP1PP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Smith-Morra gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Albin counter-gambit
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+Caro-Kann defense *
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+French defense *
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Blackmar gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+QP counter-gambit (elephant gambit)
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+KGD: Falkbeer, Milner-Barry variation
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/5N2/PPPP2PP/RNBQKB1R b KQkq -
+KGD: Falkbeer, Tartakower variation
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Falkbeer counter-gambit
+rnbqkbnr/ppp2ppp/8/3pp3/5P2/3P4/PPP1P1PP/RNBQKBNR b KQkq -
+(Dutch:) Balogh defense *
+rnbqkbnr/ppp2ppp/8/3pp3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2N2P2/PPPPP1PP/R1BQKBNR b KQkq -
+KP: Neo-Mongoloid defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2P2N2/PP1PPPPP/RNBQKB1R b KQkq -
+Caro-Masi defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+Pirc defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/3PP3/PPP2PPP/RNBQKBNR b KQkq -
+Lengfellner system *
+rnbqkbnr/ppp2ppp/8/3pp3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -
+Fried fox defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/6P1/PPPPPPBP/RNBQK1NR b KQkq -
+Robatsch (modern) defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/BP6/P1PPPPPP/RN1QKBNR b KQkq -
+Guatemala defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/P3P3/1PPP1PPP/RNBQKBNR b KQkq -
+St. George defense *
+rnbqkbnr/ppp2ppp/8/4P3/2Pp4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD: Albin counter-gambit
+rnbqkbnr/ppp2ppp/8/4p3/2Pp4/4P3/PP1P1PPP/RNBQKBNR w KQkq -
+Old Benoni: Franco-Benoni defense *
+rnbqkbnr/ppp2ppp/8/4p3/2PpP3/3P4/PP3PPP/RNBQKBNR b KQkq -
+Semi-Benoni (`blockade variation') *
+rnbqkbnr/ppp2ppp/8/8/2pPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Steinitz variation *
+rnbqkbnr/ppp3pp/3p4/4Pp2/3p4/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, 4.d3 *
+rnbqkbnr/ppp3pp/3p4/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Philidor: L\'opez counter-gambit
+rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Philidor: Philidor counter-gambit, Zukertort variation
+rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Philidor counter-gambit
+rnbqkbnr/ppp3pp/4P3/3p2N1/4p3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Philidor counter-gambit, del Rio attack
+rnbqkbnr/ppp3pp/4p3/3p1p2/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, Haberditz variation
+rnbqkbnr/ppp3pp/5p2/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Tartakower (fantasy) variation *
+rnbqkbnr/ppp3pp/5p2/3pp3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Blackmar-Diemer gambit *
+rnbqkbnr/ppp3pp/8/3Ppp2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Halasz gambit *
+rnbqkbnr/ppp3pp/8/3pN3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -
+Latvian: Polerio variation
+rnbqkbnr/ppp3pp/8/3ppP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Villemson (Steinitz) gambit *
+rnbqkbnr/ppp3pp/8/3ppp2/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -
+Robatsch defense: three pawns attack *
+rnbqkbnr/ppp3pp/8/4pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, 5.de *
+rnbqkbnr/pppp1B1p/8/8/4Ppp1/5N2/PPPP2PP/RNBQK2R b KQkq -
+KGA: Lolli gambit (wild Muzio gambit)
+rnbqkbnr/pppp1p1p/6p1/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+English: Adorjan defense
+rnbqkbnr/pppp1p1p/6p1/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Steinitz variation *
+rnbqkbnr/pppp1p1p/8/4N3/2B1Ppp1/8/PPPP2PP/RNBQK2R b KQkq -
+KGA: Salvio gambit
+rnbqkbnr/pppp1p1p/8/4N3/3PPpp1/8/PPP3PP/RNBQKB1R b KQkq -
+KGA: S\o rensen gambit
+rnbqkbnr/pppp1p1p/8/6N1/4PppP/8/PPPP2P1/RNBQKB1R b KQkq -
+KGA: Allgaier gambit
+rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R b KQkq -
+KGA: King's knight's gambit
+rnbqkbnr/pppp1p1p/8/6p1/3PPp2/5N2/PPP3PP/RNBQKB1R b KQkq -
+KGA: Rosentreter gambit
+rnbqkbnr/pppp1p1p/8/6p1/4Pp1P/5N2/PPPP2P1/RNBQKB1R b KQkq -
+King's knight's gambit
+rnbqkbnr/pppp1p1p/8/6p1/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -
+KGA: Quaade gambit
+rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+KGA: MacDonnell gambit
+rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 b kq -
+KGA: Muzio gambit
+rnbqkbnr/pppp1p1p/8/8/2BPPpp1/5N2/PPP3PP/RNBQK2R b KQkq -
+KGA: Ghulam Kassim gambit
+rnbqkbnr/pppp1p2/8/4N2p/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, long whip (Stockwhip, classical) defense
+rnbqkbnr/pppp1pp1/7p/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Becker defense
+rnbqkbnr/pppp1ppp/4p3/4P3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+French: Steinitz attack
+rnbqkbnr/pppp1ppp/4p3/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+French defense, Steiner variation
+rnbqkbnr/pppp1ppp/4p3/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppp1ppp/4p3/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn
+rnbqkbnr/pppp1ppp/4p3/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -
+French: R\'eti (Spielmann) variation
+rnbqkbnr/pppp1ppp/4p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+French: King's Indian attack
+rnbqkbnr/pppp1ppp/4p3/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+French: Chigorin variation
+rnbqkbnr/pppp1ppp/4p3/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+French: Labourdonnais variation
+rnbqkbnr/pppp1ppp/4p3/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Van't Kruijs opening *
+rnbqkbnr/pppp1ppp/8/4N3/4p3/8/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense: Mokele Mbembe (B\"ucker) variation *
+rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq -
+KP: Patzer opening
+rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Bishop's opening
+rnbqkbnr/pppp1ppp/8/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English opening
+rnbqkbnr/pppp1ppp/8/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+English, Nimzovich variation
+rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Scandinavian (center counter) defense *
+rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Charlick (Englund) gambit
+rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Vienna game
+rnbqkbnr/pppp1ppp/8/4p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+KP: Lopez opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+KP: Indian opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+King's knight opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq -
+KP: King's head opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+KP: Napoleon's opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's pawn game *
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's pawn game
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -
+Alapin's opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq -
+KP: Mengarini's opening
+rnbqkbnr/pppp1ppp/8/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+King's gambit
+rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Fred *
+rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird: From gambit
+rnbqkbnr/pppp1ppp/8/4p3/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Reversed Grob (Borg/Basman defense/macho Grob) *
+rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Owen defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: modern variation
+rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+Dunst (Sleipner,Heinrichsen) opening
+rnbqkbnr/pppp1ppp/8/4p3/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Caro-Kann defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -
+Mieses opening
+rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPPNPPPP/R1BQKBNR b KQkq -
+Valencia opening
+rnbqkbnr/pppp1ppp/8/4p3/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+French defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+Benko's opening: reversed Alekhine
+rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -
+Barnes defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -
+Hammerschlag (Fried fox/Pork chop opening)
+rnbqkbnr/pppp1ppp/8/4p3/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Robatsch (modern) defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/7P/PPPPPPP1/RNBQKBNR b KQkq -
+Carr's defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+King's pawn opening *
+rnbqkbnr/pppp1ppp/8/4p3/8/N7/PPPPPPPP/R1BQKBNR b KQkq -
+Lemming defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/P1N5/1PPPPPPP/R1BQKBNR b KQkq -
+Battambang opening
+rnbqkbnr/pppp1ppp/8/4p3/8/P6P/1PPPPPP1/RNBQKBNR b KQkq -
+Global opening
+rnbqkbnr/pppp1ppp/8/4p3/8/P7/1PPPPPPP/RNBQKBNR b KQkq -
+St. George (Baker) defense *
+rnbqkbnr/pppp1ppp/8/4p3/P6P/8/1PPPPPP1/RNBQKBNR b KQkq -
+Crab opening
+rnbqkbnr/pppp1ppp/8/4p3/P7/8/1PPPPPPP/RNBQKBNR b KQkq -
+Corn stalk defense *
+rnbqkbnr/pppp1ppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR b KQkq -
+KGA: bishop's gambit
+rnbqkbnr/pppp1ppp/8/8/2P1p3/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English, Nimzovich, Flohr variation
+rnbqkbnr/pppp1ppp/8/8/3Np3/8/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/pppp1ppp/8/8/3PPp2/8/PPP3PP/RNBQKBNR b KQkq -
+KGA: Villemson (Steinitz) gambit
+rnbqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KBNR b KQkq -
+Center game
+rnbqkbnr/pppp1ppp/8/8/3p4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian defense *
+rnbqkbnr/pppp1ppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+Danish gambit
+rnbqkbnr/pppp1ppp/8/8/3pP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Center game
+rnbqkbnr/pppp1ppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq -
+Halasz gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp1P/8/PPPP2P1/RNBQKBNR b KQkq -
+KGA: Pawn's gambit (Stamma gambit)
+rnbqkbnr/pppp1ppp/8/8/4Pp2/1P6/P1PP2PP/RNBQKBNR b KQkq -
+KGA: Orsini gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+KGA: Keres (Mason-Steinitz) gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/3B4/PPPP2PP/RNBQK1NR b KQkq -
+KGA: Schurig gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R b KQkq -
+King's knight's gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/5Q2/PPPP2PP/RNB1KBNR b KQkq -
+KGA: Breyer gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP1KPP/RNBQ1BNR b kq -
+KGA: Tumbleweed gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP2PP/RNBQKBNR w KQkq -
+King's gambit accepted
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPB1PP/RNBQK1NR b KQkq -
+KGA: Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPQ1PP/RNB1KBNR b KQkq -
+KGA: Carrera (Basman) gambit
+rnbqkbnr/pppp1ppp/8/8/4p3/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Steinitz attack *
+rnbqkbnr/pppp1ppp/8/8/4p3/8/PPPPPPPP/RNBQKBNR b KQkq -
+Alekhine's defense: Brooklyn defense *
+rnbqkbnr/pppp2p1/8/4pP1p/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Pawn's gambit (Stamma gambit) *
+rnbqkbnr/pppp2pp/4p3/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Dutch defense, Rubinstein variation
+rnbqkbnr/pppp2pp/4p3/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Dutch defense
+rnbqkbnr/pppp2pp/4p3/5p2/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit deferred
+rnbqkbnr/pppp2pp/4p3/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -
+Dutch, Von Pretzel gambit
+rnbqkbnr/pppp2pp/5p2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Damiano's defense
+rnbqkbnr/pppp2pp/5p2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: King's head opening *
+rnbqkbnr/pppp2pp/8/4Pp2/3p4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 3...e4 *
+rnbqkbnr/pppp2pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's gambit accepted *
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Calabrese counter-gambit, Jaenisch variation
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Latvian gambit, 3.Bc4
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+KGD: classical variation *
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Calabrese counter-gambit
+rnbqkbnr/pppp2pp/8/4pp2/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+KGD: Mafia defense *
+rnbqkbnr/pppp2pp/8/4pp2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Grand Prix attack *
+rnbqkbnr/pppp2pp/8/4pp2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Bird's opening: Williams gambit *
+rnbqkbnr/pppp2pp/8/4pp2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+KGD: Falkbeer counter-gambit *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGD: 2...Nf6 *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Latvian counter-gambit
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+KGD: Norwalde variation *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's gambit *
+rnbqkbnr/pppp2pp/8/4pp2/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Labourdonnais variation *
+rnbqkbnr/pppp2pp/8/5p2/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, L\'opez-Gianutio counter-gambit
+rnbqkbnr/pppp2pp/8/5p2/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+KGD: Nimzovich counter-gambit *
+rnbqkbnr/pppp2pp/8/5p2/3pP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer counter-gambit *
+rnbqkbnr/pppp2pp/8/5p2/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Gianutio counter-gambit
+rnbqkbnr/pppp3p/6p1/4pp2/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+KGD: Keene's defense *
+rnbqkbnr/ppppp1pp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Barnes defense
+rnbqkbnr/ppppp1pp/5p2/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Gedult's opening *
+rnbqkbnr/ppppp1pp/8/5p2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Anglo-Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -
+Dutch, Krejcik gambit
+rnbqkbnr/ppppp1pp/8/5p2/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq -
+Dutch, Manhattan (Alapin, Ulvestad) variation
+rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -
+Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/3P4/7P/PPP1PPP1/RNBQKBNR b KQkq -
+Dutch, Korchnoi attack
+rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Bird's opening *
+rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Dutch
+rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit
+rnbqkbnr/ppppp1pp/8/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+R\'eti: Pirc-Lisitsin gambit
+rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Bird: From gambit *
+rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Fred
+rnbqkbnr/ppppp1pp/8/5p2/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Bird: Hobbs gambit *
+rnbqkbnr/ppppp1pp/8/5p2/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Dutch variation
+rnbqkbnr/ppppp1pp/8/5p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti v Dutch
+rnbqkbnr/ppppp1pp/8/5p2/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Bird's opening *
+rnbqkbnr/ppppp1pp/8/5pB1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Dutch, 2.Bg5 variation
+rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPP2PPP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit
+rnbqkbnr/pppppp1p/6p1/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppppp1p/6p1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Modern defense
+rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqkbnr/pppppp1p/6p1/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -
+Lasker simul special *
+rnbqkbnr/pppppp1p/6p1/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Benko's opening *
+rnbqkbnr/pppppp1p/8/6p1/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Reversed Grob (Borg/Basman defense/macho Grob)
+rnbqkbnr/pppppp1p/8/6p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird: Hobbs gambit
+rnbqkbnr/pppppp1p/8/6p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti: Herrstr\"om gambit
+rnbqkbnr/pppppp1p/8/6p1/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Grob's attack *
+rnbqkbnr/ppppppp1/7p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Carr's defense
+rnbqkbnr/ppppppp1/7p/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Clemenz (Mead's, Basman's or de Klerk's) opening *
+rnbqkbnr/ppppppp1/8/7p/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -
+Lasker simul special
+rnbqkbnr/ppppppp1/8/7p/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Anti-Borg (Desprez) opening *
+rnbqkbnr/pppppppp/8/4P3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense: Brooklyn defense
+rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Polish (Sokolsky) opening
+rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+English opening
+rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's pawn
+rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's pawn opening
+rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Bird's opening
+rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Grob's attack
+rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -
+Anti-Borg (Desprez) opening
+rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack
+rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+Dunst (Sleipner, Heinrichsen) opening
+rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Saragossa opening
+rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+Mieses opening
+rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+Van't Kruijs opening
+rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+R\'eti opening
+rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -
+Gedult's opening
+rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Benko's opening
+rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq -
+Amar (Paris) opening
+rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq -
+Clemenz (Mead's, Basman's or de Klerk's) opening
+rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq -
+Durkin's attack
+rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq -
+Anderssen's opening
+rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq -
+Ware (Meadow Hay) opening
+rnbqkr2/pppp1pQp/8/2b1P3/3P4/5N2/PPP3PP/RNB1KB1n b KQq -
+Latvian: Behting variation *
+rnbqkr2/ppppbp1p/5N2/4Q3/8/8/PPPP1nPP/R1B1KBNR b KQq -
+Blackburne shilling gambit *
+rnbqr1k1/1p1p1ppp/pbp2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Suetin variation *
+rnbqr1k1/1p3pp1/2p2n1p/p1bpp3/4P3/PBNP1N2/1PP1QPPP/R1B1K2R w KQ -
+Giuoco Piano: Tarrasch variation *
+rnbqr1k1/1pb2ppp/2p2n2/p2pp3/NPP1P3/P2P1N2/2Q1BPPP/R1B1K2R w KQ -
+Ruy Lopez: closed, Balla variation *
+rnbqr1k1/1ppp1ppp/1b3n2/p3p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, anti-Marshall 8.a4 *
+rnbqr1k1/p1pp1ppp/5n2/1p2p3/1bP1P3/2N3P1/PP1P1PBP/R1BQK1NR w KQ -
+Sicilian: Nimzovich-Rossolimo attack, Gurgenidze variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N1P/2P1BPP1/R1BQ1RK1 b - -
+Ruy Lopez: closed, Smyslov defense *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N2/1BP1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Flohr-Zaitsev system (Lenzerheide variation) *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 9.h3 *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP4/2PNBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Ragozin-Petrosian (`Keres') variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NPBN2/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Kholmov variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 b - -
+Ruy Lopez: closed, Breyer defense *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/PP2P3/2NP1N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Keres (9...a5) variation *
+rnbqr1k1/pp1p1ppp/1bp2n2/4P3/1P1p4/P1N2N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall, Herman Steiner variation *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P1PP3/P1N2N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall counter-attack *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 8.c3 *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed (with ...d6) *
+rnbqr1k1/pp3p1p/1bp3pQ/3p4/1P1N4/P1PB4/5PPP/R1B2RK1 b - -
+Ruy Lopez: Marshall, main line, 14...Qh3 *
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+Benoni: classical, 9...Re8
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b - -
+Benoni: classical, 9...Re8, 10.Nd2
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ -
+Benoni: four pawns attack, main line
+rnbqr1k1/pp3pp1/1bp2n1p/3pp3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 w - -
+Ruy Lopez: closed, Breyer, 10.d4 *
+rnbqr1k1/pp3pp1/1bp2n1p/3pp3/1P2P3/P2P1N2/2PNBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Breyer, Borisenko variation *
+rnbqr1k1/pp3pp1/1bp4p/3pp2n/1P2P3/P2P1N2/2PNBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Breyer, Simagin variation *
+rnbqr1k1/pp3ppB/3b1n2/3pN1B1/3p1P2/8/PPP3PP/RN1Q1RK1 b - -
+Petrov: classical attack, Marshall trap *
+rnbqr1k1/pp3ppp/1bp2n2/3pp1B1/1P2P3/P1NP1N2/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Bogolyubov variation *
+rnbqr1k1/pp3ppp/1bp2n2/3pp3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 9.d4 *
+rnbqr1k1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R w KQ -
+Ruy Lopez: open, 9...Be7, 10.Re1 *
+rnbqr1k1/pp3ppp/1bp5/3nN3/1P1PN3/P3B3/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: open, Breslau variation *
+rnbqr1k1/pp3ppp/1bpp1n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Pilnik variation *
+rnbqr1k1/pp3ppp/3b1n2/2ppN1B1/3P1P2/2N5/PPP1B1PP/R2QK2R w KQ -
+Petrov: classical attack, Krause variation *
+rnbqr1k1/pp3ppp/3b1n2/2ppN1BB/3P1P2/2N5/PPP3PP/R2QK2R b KQ -
+Petrov: classical attack, Mar\'oczy variation *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/1PP1P3/P1NP1N2/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Borisenko defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NP2P3/P1PP1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Rossolimo defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NPP1P3/P2P1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Chigorin defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NPP1P3/P2P4/3NBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Keres (...Nd7) defense *
+rnbqr1k1/ppbp1pp1/2p2n1p/4p3/NP2P3/P2P1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed (9...Na5) *
+rnbqr1k1/ppbp1pp1/2p2n1p/4p3/NPP1P3/P2P1N2/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed (10...c5) *
+rnbqr1k1/ppbp1ppp/2p2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Lutikov variation *
+rnbqr1k1/ppp2ppp/1b3n2/3pp3/1P2P3/P1NP1N2/2P1BPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, 7...d6, 8.d4 *
+rnbqr1k1/ppp2ppp/3b1n2/3pN3/3P4/2N5/PPP1BPPP/R1BQK2R w KQ -
+Petrov: classical attack, Chigorin variation *
+rnbqr1k1/ppp2ppp/5n2/2PP4/2B5/2N1B3/PPP2PpP/R2QK2R w KQ -
+two knights: Max Lange attack, Schlechter variation *
+rnbqr1k1/ppp2ppp/8/2PP4/2B3n1/2N1BpP1/PPP2P1P/R2QK2R b KQ -
+two knights: Max Lange attack, Loman defense *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/1BPPBPPP/R2QK2R b KQ -
+Ruy Lopez: Trajkovi\'c counter-attack *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, 7...O-O *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed *
+rnbqr1k1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP1BPPP/R1BQK2R b KQ -
+Ruy Lopez: closed, Averbach variation *
+rnbr2k1/1pq1ppbp/5np1/p1pp4/3P4/1PP1PN2/P2NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Zagoryansky variation *
+rnbr2k1/pp2qppp/5n2/2b1N3/3Pp3/P1N1B3/2PQBPPP/R4RK1 b - -
+Ruy Lopez: open, Howell attack, Ekstr\"om variation *
+rnq1kb1r/pp3ppp/4pn2/3p1b2/3P4/NQ2PN2/PP1B1PPP/R3KB1R b KQkq -
+QGD Slav: Landau variation
diff --git a/data/book/long999.idx b/data/book/long999.idx
new file mode 100644
index 0000000..a370e2e
--- /dev/null
+++ b/data/book/long999.idx
@@ -0,0 +1,8076 @@
+1q3rk1/pp3ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, classical, 13.d1b1 (Mar\'oczy) *
+1r2kb1r/p1pq2pp/Q1n5/3npp2/6b1/P2PPN2/1P3PPP/RNB1KB1R b KQk -
+Sicilian: Najdorf, Poisoned pawn variation *
+1rb2rk1/pp3ppp/5q2/3P4/1n6/2P1Q3/PP3PPP/RN2KB1R w KQ -
+Scotch: Gottschall variation
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ -
+King's Indian: S\"amisch, Panno main line
+1rbq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, Ruban variation
+1rbqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQk -
+English: closed, 5.Rb1 *
+1rbqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3PN/PPPP1PBP/R1BQK2R b KQk -
+English: closed, 5.Rb1 Taimanov variation *
+1rbqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQk -
+two knights defense: Colman variation
+2bqkbnr/r4ppp/p1npp3/1p6/4P3/1BN2N2/PP2QPPP/R1B2RK1 w k -
+Sicilian: Smith-Morra gambit, Chicago defense
+2kr1b1r/ppp3pp/2n2q2/3npp2/6b1/P2PPN2/1PQNBPPP/R1B1K2R b KQ -
+Sicilian: Najdorf, 7...Be7 main line *
+2kr1b1r/ppp3pp/2n5/3qpp2/6b1/3PPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 *
+2kr1b1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P1B1PPP/R2QKB1R b KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7 *
+2kr1b1r/pppq2pp/2n1bp2/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, Yugoslav attack, Rauser variation *
+2kr1b1r/pppq2pp/2n2n2/2Pp1p2/3Pp3/2N1P3/PP1NQPPP/R1B2RK1 b - -
+French: classical, St\a hlberg variation *
+2kr1b1r/pppq2pp/2n2n2/4pp2/1P6/P1NPPb2/3BBPPP/R2QK2R w KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6 *
+2kr1b1r/pppq2pp/2n5/3Npp2/6b1/3PPN2/PP2BPPP/R1BQ1RK1 b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4 *
+2kr1b1r/pppq2pp/2n5/3npp2/4P1b1/2NP1N2/PP2BPPP/R1BQ1RK1 b - -
+Sicilian: Richter-Rauzer, Rauzer attack, Geller variation *
+2kr1b1r/pppq2pp/2n5/3npp2/6b1/2NPPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4 *
+2kr1b1r/pppq2pp/2n5/3npp2/6b1/P1NPPN2/1P1BBPPP/R2QK2R b KQ -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7 *
+2kr3r/pp2bppp/2nqbn2/3pp1B1/8/1NN3P1/PPP1PPBP/R2Q1RK1 w - -
+Gr\"unfeld: Russian, Keres variation *
+2kr3r/ppp2ppp/1bn1bPq1/6N1/2ppNPP1/8/PPP4P/R1BQR1K1 w - -
+two knights: Max Lange attack, Berger variation
+2kr3r/pppb1ppp/2n1q2n/1Bb1p3/8/2NP1N2/PPP2PPP/R1BQR1K1 w - -
+Center game: Kupreichik variation *
+2kr3r/pppq2p1/1bn1bp2/3np2p/Q7/2NP1NP1/PP1BPPBP/R1R3K1 w - -
+Sicilian: dragon, Yugoslav attack, 12.h4 *
+2kr3r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP1BPPBP/R2Q1RK1 w - -
+Sicilian: dragon, Yugoslav attack, 10.O-O-O *
+2kr3r/pppqbppp/1nn1p3/4Pb2/2PP4/2N1BN2/PP2B1PP/R2Q1RK1 w - -
+Alekhine's defense: four pawns attack, Tartakower variation
+2kr3r/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, Grigoriev variation *
+2kr3r/ppq1nppp/2nbp3/3p4/3P2b1/5N2/PPP1BPPP/R1BQRNK1 w - -
+QGD: exchange, chameleon variation *
+2krr3/pppq1ppp/1bn5/3n4/QPN1p1b1/P2PPN2/1B3PPP/R3KB1R w KQ -
+Sicilian: Najdorf, Ivkov variation *
+2r1kb1r/1pq2ppp/p1n1pn2/2pp4/3P2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack, Gr\"unfeld variation *
+2r1kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack (with Rc1) *
+2r1kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Rubinstein attack, Karlsbad variation *
+2r1kb1r/ppq2ppp/2n1pn2/2ppN3/3P2b1/2P1P3/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Rubinstein attack, Wolf variation *
+2r1kb1r/ppq2ppp/2n1pn2/3p4/3p2b1/P1P1PN2/1P1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Rubinstein attack, main line *
+2rq1rk1/pp2ppbp/2n2np1/2Pp4/3P2b1/2N1BN2/PP2BPPP/R2Q1RK1 b - -
+QGD: Tarrasch, Bogolyubov variation *
+2rq1rk1/pp2ppbp/2n2np1/3p4/2PP2b1/1PN1BN2/P3BPPP/R2Q1RK1 b - -
+QGD: Tarrasch, Stoltz variation *
+2rq1rk1/pp3ppp/2n1pn2/2bp4/3N4/2P1P3/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, Bd3 line, 11.O-O *
+2rq1rk1/pp3ppp/2n1pn2/2bp4/8/2P1PB1P/PP1N1PP1/R1BQ1RK1 w - -
+QGD: Petrosian variation *
+2rqk2r/pp3pp1/2n1pn2/2bp3p/3N2b1/2P1P3/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Bd3 line, Janowski variation *
+2rqk2r/pp3ppp/2n1pn2/2bp4/1P4b1/2P1PN2/P2NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Bd3 line, fianchetto variation *
+2rqk2r/pp3ppp/2n1pn2/2bp4/3N2b1/2P1P3/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Bd3 line, Capablanca freeing maneuver *
+2rqk2r/pp3ppp/2n1pn2/2bp4/3N4/2P1P3/PP1NQPPP/R1B2RK1 b k -
+QGD: Orthodox defense, Bd3 line *
+2rqk2r/pp3ppp/2n1pn2/3p4/1b1P2b1/1P3N2/P1PNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Capablanca variation *
+2rqk2r/pp3ppp/2nbpn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Bd3 line *
+2rqk2r/pp3ppp/2nbpn2/3p4/3P2b1/1P3N2/P1PNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Pillsbury attack *
+2rqk2r/pp3ppp/4pn2/2bpn3/3N4/2P1P3/PP1NQPPP/R1B2RK1 w k -
+QGD: Orthodox defense, Bd3 line, Alekhine variation *
+2rqkb1r/pp1bpppp/2n2n2/2pp4/Q2P4/2P1PN2/PP1N1PPP/R1B1KB1R w KQk -
+QGD: Rochlin variation *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1NBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, 7.Rc1 *
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/P3PN2/1PPNBPPP/R1BQ1RK1 b k -
+QGD: Orthodox defense, Swiss (Henneberger) variation *
+2rqkb1r/pp3ppp/2n1pn2/3p4/3p2b1/P3PN2/1PPNBPPP/R1BQ1RK1 w k -
+QGD: Orthodox defense, Swiss, Karlsbad variation *
+2rqkb1r/pp3ppp/4pn2/3p4/3P4/1P2B2P/P1P1QPP1/RN3RK1 b k -
+QGD: Tartakower variation *
+2rqkbnr/pp3ppp/2n1p3/2p2b2/2pP4/4BNP1/PP2PPBP/RN1Q1RK1 b k -
+Gr\"unfeld: Gr\"unfeld gambit, Botvinnik variation *
+2rqkbnr/pp3ppp/2n1p3/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w k -
+Gr\"unfeld: Gr\"unfeld gambit, Capablanca variation *
+2rqkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 w k -
+QGD: Anti-neo-orthodox variation *
+3q1rk1/pp3ppp/2r1p3/2b5/4Q3/2P5/PP3PPP/R1B2RK1 b - -
+QGD: Orthodox defense, classical, 13.de *
+3q1rk1/pp3ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 b - -
+QGD: Orthodox defense, classical variation *
+4rrk1/pppb2pp/2np1q2/2b2P2/4Q3/2N4B/PPPPNP1P/R1B1K2R w KQ -
+KGA: Muzio gambit, Paulsen variation *
+5rk1/5ppp/p1pbr3/1p1n3q/P2P2b1/1BPQB1P1/1P1N1P1P/R3R1K1 w - -
+Ruy Lopez: Marshall, main line, Spassky variation
+5rk1/ppq2ppp/2r1pn2/2bp4/4P3/2P5/PP1NQPPP/R1B2RK1 w - -
+QGD: Orthodox defense, classical, 13.d1c2 (Vidmar) *
+N1bk1b1r/p2pq2p/1pnn2p1/3Qpp2/8/1B6/PPPP1PPP/R1B1K1NR w KQ -
+Vienna: `Frankenstein-Dracula' variation
+N1bk3r/pp1p1ppp/2n2n2/8/1b6/P4B1q/1PPN1P1P/R1BQK2R b KQ -
+Scotch: Berger variation
+r1b1k1nr/ppp2ppp/1bn5/3p4/4P2q/2NN4/PPPP1PPP/R1BQKB1R w KQkq -
+Vienna: Adams' gambit *
+r1b1k1nr/ppp2ppp/2n5/q3P3/1b6/2N2N2/PPPB1PPP/R2QKB1R b KQkq -
+Scandinavian: Anderssen counter-attack orthodox attack
+r1b1k1nr/pppp1ppp/1b6/8/3qPP2/1PNN2P1/P2PQ2P/n1BK1B1R b kq -
+Vienna: `Frankenstein-Dracula' variation *
+r1b1k1nr/pppp1ppp/1b6/nP2N1q1/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit declined, Hirschbach variation
+r1b1k1nr/pppp1ppp/1bn5/8/4P2q/3N4/PPPPBPPP/RNBQK2R b KQkq -
+Vienna game *
+r1b1k1nr/pppp1ppp/2n2q2/1Nb5/4P3/4B3/PPP2PPP/RN1QKB1R b KQkq -
+Scotch: Blumenfeld attack
+r1b1k1nr/pppp1ppp/2n5/1N6/1b2P2q/8/PPPB1PPP/RN1QKB1R b KQkq -
+Scotch game
+r1b1k1nr/ppppqppp/1bn5/4p1B1/2BPP3/2P2N2/PP3PPP/RN1QK2R b KQkq -
+Giuoco Piano: Mestel variation
+r1b1k1nr/ppppqppp/1bn5/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: center-holding variation
+r1b1k1nr/ppppqppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical defense, Boden variation
+r1b1k1nr/ppppqppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Giuoco Piano: close variation
+r1b1k1nr/pppq1ppp/1b6/n3N3/2B1P3/BQP5/P4PPP/RN3RK1 b kq -
+Evans gambit: Levenfish variation
+r1b1k2r/1pp1qppp/pbnp1n2/4p3/P1BPP3/2P2N1P/1P3PP1/RNBQR1K1 b kq -
+Giuoco Piano: Tarrasch variation
+r1b1k2r/1pp2ppp/p1n5/2bpq3/3NP3/2P1K3/PPN3PP/R1BQ1B1R b kq -
+two knights defense: Fegatello attack, Leonhardt variation *
+r1b1k2r/1pq1bppp/p1nppn2/8/P2NPP2/2N5/1PP1B1PP/R1BQ1R1K b kq -
+Sicilian: Scheveningen, classical, Mar\'oczy system
+r1b1k2r/1pqnbppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/2KR1B1R w kq -
+Sicilian: Najdorf, 7...Be7 main line
+r1b1k2r/2q1bppp/p2p1n2/npp1p3/P2PP3/2P2N2/1PB2PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed, Balla variation
+r1b1k2r/p1q2pp1/2pb1n1p/n3N3/3Pp3/8/PPPBBPPP/RN1QK2R b KQkq -
+two knights defense: Knorre variation
+r1b1k2r/pp1n1ppp/2p1pn2/q2p2B1/1bPP4/2N1P3/PPQN1PPP/R3KB1R b KQkq -
+QGD: Cambridge Springs defense, Bogolyubov variation
+r1b1k2r/pp3ppp/1qn1p3/2bp4/6n1/5NP1/PPPNPPBP/R1BQ1RK1 w kq -
+Gr\"unfeld: Pachman variation *
+r1b1k2r/pp3ppp/3b1q2/3P4/1P2n3/4PN2/5PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Stahlberg variation *
+r1b1k2r/ppp1qppp/5n2/4p1B1/2BnP3/2N5/PPP3PP/R2Q1RK1 b kq -
+Giuoco piano: Holzhausen attack
+r1b1k2r/ppp2ppp/2N5/1B1pP3/4n2q/8/PPP2bPP/RNBQ1K1R w kq -
+Two knights defense, Keidanz variation
+r1b1k2r/ppp3p1/2np1q1p/2b1pP2/2B5/2NP1N2/PPP2PPP/R2QK2R b KQkq -
+KGD: classical, Svenonius variation *
+r1b1k2r/pppp1ppp/1bn5/8/4n2q/2NN4/PPPPBPPP/R1BQK2R w KQkq -
+Vienna: Alekhine variation *
+r1b1k2r/pppp1ppp/2n2q2/2b5/3NP3/4K3/PPP1N1PP/R1BQ1B1R b kq -
+two knights defense: Fegatello attack, Polerio defense *
+r1b1k2r/ppppnp1p/2n4b/4q3/2B2p2/2NP1Q2/PPPB2PP/4RRK1 b kq -
+KGA: Muzio gambit, Paulsen variation
+r1b1k2r/ppppnppp/2n2q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R b KQkq -
+Scotch: Paulsen attack
+r1b1k2r/ppppnppp/2n2q2/2b5/3NP3/2P1B3/PP1Q1PPP/RN2KB1R b KQkq -
+Scotch: Blackburne attack
+r1b1k2r/ppppnppp/2n2q2/2b5/4P3/2P1B3/PPN2PPP/RN1QKB1R b KQkq -
+Scotch: Meitner variation
+r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/1QN2N2/P4PPP/R1BR2K1 b kq -
+Evans gambit: compromised defense, Potter variation
+r1b1k2r/ppppnppp/2n3q1/b3P3/2B5/BQN2N2/P4PPP/R4RK1 b kq -
+Evans gambit: compromised defense, Paulsen variation
+r1b1kb1r/1pp3pp/p1n2n2/5pq1/2BPp3/2N1PP2/PP1N2PP/R1BQ1RK1 b kq -
+French: Steinitz, Brodsky-Jones variation *
+r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b kq -
+Sicilian: Scheveningen, classical
+r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N5/PPP1B1PP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen, classical variation with ...Qc7 and ...Nc6
+r1b1kb1r/2p1nppp/p1p5/3P4/3Pp3/4P3/PPQ1NP1q/RNB1K1R1 w Qkq -
+French: Winawer, advance, poisoned pawn, Konstantinopolsky variation *
+r1b1kb1r/p1q2pp1/2p2n1p/n3N3/4p3/8/PPPPBPPP/RNBQK2R w KQkq -
+two knights defense: G\"oring variation
+r1b1kb1r/p1q2ppp/2p2n2/n3p1N1/8/3B1Q2/PPPP1PPP/RNB1K2R b KQkq -
+two knights defense: Paoli variation
+r1b1kb1r/pp1n1ppp/2p1p3/q2n2B1/3P4/2N1PN2/PP3PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense, Yugoslav variation
+r1b1kb1r/pp1n1ppp/2p1pB2/q2p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD: Cambridge Springs defense, Capablanca variation
+r1b1kb1r/pp1n1ppp/2p1pn2/q2P2B1/3P4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD: Cambridge Springs defense, 7.cd
+r1b1kb1r/pp1n1ppp/2p1pn2/q2p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense
+r1b1kb1r/pp1n1ppp/2p1pn2/q2p4/2PP4/2N2N2/PP1BPPPP/2RQKB1R b Kkq -
+QGD: Rochlin variation
+r1b1kb1r/pp1n1ppp/2p1pn2/q5B1/2pP4/2N1P3/PP1N1PPP/R2QKB1R w KQkq -
+QGD: Cambridge Springs defense, Rubinstein variation
+r1b1kb1r/pp1p1ppp/1qn1pn2/8/2PN4/2N3P1/PP2PP1P/R1BQKB1R w KQkq -
+English: symmetrical, Geller variation
+r1b1kb1r/pp1p1ppp/4pn2/1Bp5/3nPq2/2N2N2/PPPP1PPP/R1BQR1K1 w kq -
+English: four knights, Stean variation *
+r1b1kb1r/pp2pppp/1qn2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: Russian variation *
+r1b1kb1r/pp2pppp/1qn2n2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Reifir (Spielmann) variation
+r1b1kb1r/pp2pppp/1qnp1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin, Benk\"o variation
+r1b1kb1r/pp2pppp/2n2n2/q1pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: Flohr variation *
+r1b1kb1r/pp2pppp/2n2n2/q2p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Czerniak variation
+r1b1kb1r/pp3ppp/1qn1pn2/2pp4/3P4/4PNP1/PPP2PBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Botvinnik variation *
+r1b1kb1r/pp3ppp/1qn1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with e3 & Qb3 *
+r1b1kb1r/pp3ppp/2n2n2/2qpp1B1/8/5NP1/PPP1PPBP/RN1Q1RK1 b kq -
+Gr\"unfeld: Russian, Smyslov variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/1P3NP1/P1P1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Levenfish variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/2N2NP1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: Russian, Byrne (Simagin) variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/2P2NP1/PP2PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Szabo (Boleslavsky) variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Russian variation with e4 *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/N4NP1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: Russian, Prins variation *
+r1b1kb1r/pp3ppp/2n2n2/2qpp3/8/P4NP1/1PP1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Russian, Alekhine (Hungarian) variation *
+r1b1kb1r/pp3ppp/2n5/2pqp3/8/3P1NP1/PP2PP1P/R1BQKB1R b KQkq -
+Sicilian: accelerated fianchetto, Gurgenidze variation *
+r1b1kb1r/ppppq1pp/2n2n2/3Q4/8/5N2/PPP1PPPP/RNB1KB1R w KQkq -
+Queen's pawn: Englund gambit
+r1b1kb1r/ppppq1pp/2n2n2/4N1B1/3Pp3/8/PPP2PPP/RN1QKB1R w KQkq -
+Vienna gambit: Kaufmann variation *
+r1b1kb1r/ppppqppp/5n2/1B2N3/3nPP2/2N5/PPPP2PP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, Bogolyubov variation
+r1b1kb1r/ppq1pppp/2n2n2/1Bpp4/8/2NPPN2/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, Milner-Barry (Zurich) variation *
+r1b1kb1r/ppq2ppp/2n1pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Stoltz variation *
+r1b1kb1r/ppqp1ppp/2B1pn2/2p5/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+English: four knights, Romanishin variation *
+r1b1kbnr/1p2pppp/p1q5/2pp4/1P6/4PN2/P1PP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: classical, Adorjan gambit *
+r1b1kbnr/1p2pppp/p1q5/2pp4/3P4/2N1PN2/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, Botvinnik variation *
+r1b1kbnr/1p2pppp/p1q5/2ppN3/3P4/4P3/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation, main line *
+r1b1kbnr/1pp2ppp/p1pq4/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: exchange, Bronstein variation
+r1b1kbnr/1pq1pppp/p1n5/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical, Noa variation, 5.a3 *
+r1b1kbnr/1pq1pppp/p7/2ppN3/3P4/4P3/PPP2PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical, Noa variation, main line, 7.Qc2 *
+r1b1kbnr/1pq2ppp/p3p3/2ppN3/3PP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, San Remo variation *
+r1b1kbnr/1pqp1ppp/p1n1p3/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: Taimanov variation
+r1b1kbnr/2p2ppp/p1p5/3p2q1/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, poisoned pawn variation *
+r1b1kbnr/p1p2ppp/2p5/3pN1q1/3Pp3/4P2P/PPP2PP1/RNBQ1K1R w kq -
+French: MacCutcheon, Duras variation *
+r1b1kbnr/p1pp1ppp/1pn5/8/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -
+Vienna: Steinitz gambit, Fraser-Minckwitz variation
+r1b1kbnr/pp1qpppp/2np4/1B6/3QP3/5N2/PPP2PPP/RNB1K2R w KQkq -
+Sicilian: Chekhover, Zaitsev variation
+r1b1kbnr/pp2pppp/1qn5/1Bp5/2p5/2N1PN2/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6 *
+r1b1kbnr/pp2pppp/1qn5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Spielmann variation *
+r1b1kbnr/pp2pppp/1qn5/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Russian variation *
+r1b1kbnr/pp2pppp/2nq4/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Mikenas attack *
+r1b1kbnr/pp3ppp/1qn1p3/2ppP3/3P4/2PB1N2/PP3PPP/RNBQK2R b KQkq -
+French: advance, Milner-Barry gambit
+r1b1kbnr/ppp1pppp/2n5/3q4/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense, Marshall gambit
+r1b1kbnr/ppp1pppp/2n5/7q/8/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Novosibirsk opening *
+r1b1kbnr/ppp1qppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -
+QGD: Albin counter-gambit, Balogh variation
+r1b1kbnr/ppp2ppp/2n5/1B1p2q1/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Russian variation *
+r1b1kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPPN1PPP/RNBQKB1R w KQkq -
+French: Steinitz, Gledhill attack *
+r1b1kbnr/ppp2ppp/2n5/3p4/3PPp1q/2N5/PPP1K1PP/R1BQ1BNR w kq -
+Vienna: Steinitz gambit, Zukertort defense
+r1b1kbnr/ppp3pp/2n2q2/3pN3/3PpP2/8/PPP3PP/RNBQKB1R w KQkq -
+Vienna gambit: Heyde variation *
+r1b1kbnr/ppp3pp/2n5/5pq1/2BPp3/4P3/PP1N1PPP/RNBQK2R w KQkq -
+French: Steinitz, Bradford attack *
+r1b1kbnr/pppnq2p/8/4Npp1/3Q1P2/8/PPP3PP/RNB1KB1R w KQkq -
+KGD: Falkbeer, Charousek variation *
+r1b1kbnr/pppp1Npp/8/8/4q3/5n2/PPPPBP1P/RNBQKR2 w Qkq -
+Blackburne shilling gambit
+r1b1kbnr/pppp1p1p/2n5/4N3/2B1Pppq/8/PPPP2PP/RNBQ1K1R w kq -
+KGA: Herzfeld gambit
+r1b1kbnr/pppp1p1p/5q2/4n3/2B1PQ2/2N5/PPPP2PP/R1B2RK1 w kq -
+Vienna: Hamppe-Muzio, Dubois variation
+r1b1kbnr/pppp1ppp/2n2q2/4p3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Goldman (Spielmann) variation *
+r1b1kbnr/pppp1ppp/2n5/1B2p1q1/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Vienna: Zhuravlev countergambit *
+r1b1kbnr/pppp1ppp/2n5/1N6/4P2q/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Horwitz attack
+r1b1kbnr/pppp1ppp/2n5/8/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Boden defense
+r1b1kbnr/pppp1ppp/2n5/8/3NP2q/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Scotch: Steinitz variation
+r1b1kbnr/pppp1ppp/2n5/8/3NP2q/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Pulling counter-attack
+r1b1kbnr/pppp1ppp/2n5/8/4P2q/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Fraser attack
+r1b1kbnr/pppp2pp/2n2q2/4N3/3Pp3/8/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit: Paulsen attack *
+r1b1kbnr/pppp2pp/2n2q2/4N3/3PpP2/8/PPP3PP/RNBQKB1R b KQkq f3
+Vienna gambit: Bardeleben variation *
+r1b1kbnr/ppppq1pp/2n5/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Rubinstein variation *
+r1b1kbnr/ppppqppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Vinogradov variation
+r1b1kbnr/ppq1pppp/2n5/1B1p4/3P4/5N2/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation, 5.cd ed *
+r1b1kbnr/ppq1pppp/2n5/1Bp5/2p5/4PN2/PP1P1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: classical, Pir\'c variation *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, 4...c5 *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R b KQkq -
+Nimzo-Indian: classical, Noa variation *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/8/2N1PN2/PPPP1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: classical, 4...Nc6 *
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: classical variation *
+r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Taimanov variation
+r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Taimanov (Bastrikov) variation
+r1b1kbnr/ppqppppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Flohr variation
+r1b2knr/pppp3p/2n2qP1/2b1p2Q/6P1/8/PPPP1PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, Fraser variation *
+r1b2rk1/1p2qp1p/2n1pn2/pBbpN1p1/5B2/2P1P3/PP3PPP/RN1Q1RK1 w - -
+QGD Slav: Dutch, S\"amisch variation *
+r1b2rk1/1p2qppp/2n1pn2/pBbp4/5B2/2P1PN2/PP3PPP/RN1Q1RK1 w - -
+QGD Slav: Dutch variation, main line *
+r1b2rk1/1pp1qppp/2n2n2/p1bPp3/8/2PP1N2/PP1NBPPP/R1BQ1RK1 b - -
+Philidor: Nimzovich, Sozin variation *
+r1b2rk1/1pq1bppp/p1nppn2/8/3NPP2/2N1B3/PPP1B1PP/R3QRK1 w - -
+Sicilian: Scheveningen, classical main line
+r1b2rk1/2q1bppp/p1np1n2/1pP1p3/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 b - -
+Ruy Lopez: closed, Chigorin, Rauzer attack
+r1b2rk1/2q1bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Chigorin, 12...Nc6
+r1b2rk1/2q1bppp/p1pp1n2/np2p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Rossolimo defense
+r1b2rk1/2q1bppp/p2p1n2/np2p3/3PP3/5N1P/PPBN1PP1/R1BQR1K1 b - -
+Ruy Lopez: closed, Chigorin, 12...c5d4
+r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Chigorin defense
+r1b2rk1/5ppp/p1pb4/1p1n4/3P4/1BP3Pq/PP3P1P/RNBQR1K1 w - -
+Ruy Lopez: Marshall, main line, 14...Qh3
+r1b2rk1/p1q2ppp/2n2n2/3pp3/N7/1B1P4/PPPB1bPP/R2Q1KNR w - -
+Evans gambit: Fraser-Mortimer attack *
+r1b2rk1/p4ppp/1qB2n2/2bp4/3P4/2N5/PPP2PPP/R1BQK2R b KQ -
+Giuoco Piano: Bernstein variation *
+r1b2rk1/p4ppp/2n2n2/q1bpp1B1/8/1BNP4/PPP2PPP/R2QK1NR w KQ -
+Evans gambit: Fraser attack *
+r1b2rk1/pp1n1ppp/2p1pn2/q2p4/1bPP3B/2N1P3/PPQN1PPP/R3KB1R b KQ -
+QGD: Cambridge Springs defense, Argentine variation
+r1b2rk1/pp1nqppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2Q1RK1 w - -
+Ruy Lopez: open, Malkin variation *
+r1b2rk1/pp1nqppp/2n1p3/3pP3/2pP1P2/2N2N2/PPPQ2PP/2KR1B1R w - -
+French: classical, St\a hlberg variation
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -
+QGD: Orthodox defense, Bd3 line, 11.O-O
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line
+r1b2rk1/pp1nqppp/2p1p3/3n4/2BPN3/4PN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line, Alekhine variation
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/1Q3RK1 b - -
+QGD: Orthodox defense, classical, 13.d1b1 (Mar\'oczy)
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PP3PPP/3Q1RK1 w - -
+QGD: Orthodox defense, classical variation
+r1b2rk1/pp1nqppp/2p5/4p3/2BP4/2R1PN2/PPQ2PPP/5RK1 b - -
+QGD: Orthodox defense, classical, 13.d1c2 (Vidmar)
+r1b2rk1/pp2nppp/2pq1n2/3pp1B1/1b2P2N/1BNP4/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Blake variation
+r1b2rk1/pp2ppbp/1qnp1np1/4P3/3N1P2/2N1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Zollner gambit
+r1b2rk1/pp2ppbp/2nq1np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Botvinnik variation *
+r1b2rk1/pp2ppbp/2q2np1/2pp4/8/1P2P3/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: old main line, 9.Qxc3 *
+r1b2rk1/pp2qppp/1bn2n2/4p3/1P6/P1NPP3/R4PPP/2BQKBNR b K -
+Sicilian: Smith-Morra gambit, Chicago defense *
+r1b2rk1/pp2qppp/2n1pn2/2bp4/2P1P3/2NB1N2/PP2QPPP/R1B2RK1 b - -
+QGD: Semi-Tarrasch, Levenfish variation
+r1b2rk1/pp2qppp/2nb1n2/2p1p3/2BP4/2N1PN2/PP2QPPP/R1B2RK1 w - -
+QGD: Semi-Tarrasch, Levenfish variation *
+r1b2rk1/pp3ppp/2p5/4q3/2B5/2R1P3/PP3PPP/3Q1RK1 w - -
+QGD: Orthodox defense, classical, 13.de
+r1b2rk1/ppp1qppp/2n2n2/1B1pp3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 w - -
+Four knights: Alatortsev variation
+r1b2rk1/ppp1qppp/2np1n2/1B2p1B1/4P3/2PP1N2/P1P2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Metger unpin
+r1b2rk1/pppp2pp/2n5/2b1pq2/4N3/5Q2/PPPP1P1P/R1B1KBNR b KQ -
+Vienna: Hamppe-Muzio, Dubois variation *
+r1b2rk1/ppq1ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky variation with Qc2 *
+r1b2rk1/ppqnppbp/5np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, main line *
+r1b3nr/ppppkBpp/1b6/nP2N1qQ/4P3/8/P1PP1PPP/RNB1K2R b KQ -
+Evans gambit declined, V\'asquez variation
+r1b3r1/ppp2k1p/1b6/nP2B1q1/3PP3/8/P1PN1PPP/R2QK2R b KQ -
+Evans gambit declined, Pavlov variation
+r1bB1rk1/pp3ppp/8/4p3/3nn3/3P4/PPP1KbPP/R2Q1BNR w - -
+Scotch: Sea-cadet mate *
+r1bk1bnr/2p2ppp/p1p5/3P4/3Pp3/4P3/PPQ1NP1q/RNB1K1R1 w Q -
+French: Winawer, advance, poisoned pawn, Euwe-Gligori\'c variation *
+r1bk2nr/pppp1Qpp/1b6/nP2q3/2B1P3/8/PBPP1PPP/RN2K2R b KQ -
+Evans gambit declined, Hicken variation
+r1bk2nr/pppp1ppp/2n3q1/1N6/8/8/PPPNBPPP/R2Q1RK1 w - -
+Scotch: Rosenthal variation
+r1bk2nr/ppppq1pp/2n5/2b1PP1Q/8/8/PPPP2PP/RNBK1BNR b - -
+KGA: L\'opez-Gianutio counter-gambit, Hein variation *
+r1bnk2r/ppppnppp/5q2/1Bb5/3NP3/2P1B3/PP3PPP/RN1QK2R w KQkq -
+Scotch: Paulsen, Gunsberg defense
+r1bq1b1r/ppn3pp/2p1k3/3np3/2BPQ3/P1N5/1PP2PPP/R1B1K2R w KQ -
+two knights defense: Fegatello attack, Leonhardt variation
+r1bq1b1r/ppp1n1pp/4k3/3np3/2B5/2N2Q2/PPPP1PPP/R1B1K2R w KQ -
+two knights defense: Fegatello attack, Polerio defense
+r1bq1b1r/ppp2kp1/2n5/1B1p1PPp/3Qn3/5N2/PPP2P1P/RNB1K2R w KQ -
+KGA: Kieseritsky, Brentano defense, Kaplanek variation *
+r1bq1bnr/ppp1k1pp/2n5/3ppP1Q/3P4/2N5/PPP2PPP/R1B1KBNR b KQ -
+Vienna: Steinitz gambit, Zukertort defense *
+r1bq1bnr/ppp1k1pp/2n5/3ppP1Q/8/1PN5/P1PP1PPP/R1B1KBNR b KQ -
+Vienna: Steinitz gambit, Fraser-Minckwitz variation *
+r1bq1k1r/2p2ppp/p4n2/1pbPR1N1/3n4/1B6/PPPP1PPP/RNBQ2K1 w - -
+Ruy Lopez: Rabinovich variation
+r1bq1k1r/pp2nppp/2n5/4p3/2Pp4/3P1NP1/4PP1P/RN1QKB1R w KQ -
+Benk\"o gambit: Ne2 variation *
+r1bq1knr/pp3p1p/2n3p1/4p3/2Pp4/3P1NP1/4PP1P/RN1QKB1R w KQ -
+Benk\"o gambit *
+r1bq1knr/ppp3pp/2n5/2bp1P1Q/4p1P1/3P4/PPP2PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, Grimm attack *
+r1bq1knr/ppp3pp/2n5/2bppP1Q/6P1/8/PPPPNPBP/RNB1K2R b KQ -
+KGA: bishop's gambit, classical defense *
+r1bq1knr/ppp4p/2n3p1/2bppP1Q/6P1/8/PPPPNPBP/RNB1K2R w KQ -
+KGA: bishop's gambit, McDonnell attack *
+r1bq1knr/pppp3p/2n3p1/2b1pP1Q/6P1/8/PPPP1PBP/RNB1K1NR w KQ -
+KGA: bishop's gambit, McDonnell attack *
+r1bq1r1k/1pp1b1pp/2n5/p2npp2/8/P1NPPN2/1PQ1BPPP/R1B1K2R w KQ -
+Sicilian: Scheveningen, classical, Mar\'oczy system *
+r1bq1rk1/1p1n1pbp/2pp1np1/p3p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 w - -
+King's Indian: orthodox, 7...Nbd7, main line
+r1bq1rk1/1p1nbppp/p1p1pn2/3P2B1/3P4/2N1PN2/PPQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack, main line
+r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R w K -
+QGD: Orthodox defense, Rubinstein attack, Karlsbad variation
+r1bq1rk1/1p1nbppp/p1p1pn2/3p2B1/2PP4/P1N1PN2/1PQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack, Gr\"unfeld variation
+r1bq1rk1/1p1nppbp/2n3p1/p7/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 b - -
+Benoni: fianchetto, 11...Re8 *
+r1bq1rk1/1p2bppp/2n2n2/p3p1B1/2Pp4/P2P1NP1/1P3PBP/RN1Q1RK1 b - -
+Benoni: classical with ...a6 and 10...Bg4 *
+r1bq1rk1/1p2bppp/2n2n2/p3p3/2Pp4/P2P1NP1/1P3PBP/RNBQ1RK1 w - -
+Benoni: classical, 9...a6, 10.a4 *
+r1bq1rk1/1p2ppbp/2np1np1/p7/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -
+Sicilian: dragon, Yugoslav attack, Byrne variation
+r1bq1rk1/1p2ppbp/2np1np1/p7/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Alekhine variation
+r1bq1rk1/1p3ppp/2n1pn2/pBbp4/5B2/2P1PN2/PP3PPP/RN1QK2R w KQ -
+QGD Slav: Dutch variation *
+r1bq1rk1/1p3ppp/p1n1pn2/1BbP4/8/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd *
+r1bq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Panno variation
+r1bq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, Panno formation
+r1bq1rk1/1pp2ppp/1bn5/p2PN3/1P1P4/P7/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Berger variation *
+r1bq1rk1/1ppnbppp/p3pn2/3P2B1/3P4/2N1PN2/PP3PPP/2RQKB1R b K -
+QGD: Orthodox defense, Swiss, Karlsbad variation
+r1bq1rk1/1ppnbppp/p3pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -
+QGD: Orthodox defense, Swiss (Henneberger) variation
+r1bq1rk1/2p1bpp1/p1np1n1p/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Smyslov defense
+r1bq1rk1/2p1bppp/2np1n2/pp2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Keres (9...a5) variation
+r1bq1rk1/2p1bppp/p1n2n2/1p1P4/4p3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: Marshall, Herman Steiner variation
+r1bq1rk1/2p1bppp/p1n2n2/1p1pp3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: Marshall counter-attack
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/3PP3/1BP2N2/PP3PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, 9.d4
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, 9.h3
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 w - -
+Ruy Lopez: closed (with ...d6)
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BPP1N2/PP3PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Pilnik variation
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/2P2N2/PPBP1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Lutikov variation
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/PBP2N2/1P1P1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, Suetin variation
+r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 b - -
+Ruy Lopez: closed (9...Na5)
+r1bq1rk1/2pnbppp/p1np4/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Ragozin-Petrosian (`Keres') variation
+r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP2N/1BP4P/PP3PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, Breyer, Simagin variation
+r1bq1rk1/2pnbppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Breyer, Borisenko variation
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w - -
+Ruy Lopez: closed, 7...O-O
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w - -
+Ruy Lopez: Worrall attack, sharp line
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/4P3/1BP2N2/PP1P1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, 8.c3
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQR1K1 b - -
+Ruy Lopez: closed, anti-Marshall 8.a4
+r1bq1rk1/3nbppp/p2p4/npp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Keres (...Nd7) defense
+r1bq1rk1/4bppp/p1np1n2/1pp1p3/3PP3/2P2N1P/PPB2PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Borisenko defense
+r1bq1rk1/4bppp/p1p5/1p1nR3/3P4/1BP5/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: Marshall, main line, 12.d2d4
+r1bq1rk1/4bppp/p1p5/1p1nR3/8/1BP5/PP1P1PPP/RNBQ2K1 w - -
+Ruy Lopez: Marshall counter-attack, 11...c6
+r1bq1rk1/4bppp/p2p1n2/npp1p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed (10...c5)
+r1bq1rk1/4bppp/ppnppn2/8/2P1P3/N1N5/PP2BPPP/R1BQ1RK1 w - -
+Sicilian, Sz\'en, hedgehog variation
+r1bq1rk1/5ppp/p1p1pn2/2bp4/2P5/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line *
+r1bq1rk1/5ppp/p1pbpn2/2pp4/2PP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 8...Bxc3 *
+r1bq1rk1/5ppp/p2b4/1p1p4/3P4/2P1R3/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: Marshall, Kevitz variation
+r1bq1rk1/p1p2ppp/2pp1n2/4p3/1b1PP3/2N2N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: Svenonius variation *
+r1bq1rk1/p1pnbppp/1p3n2/1B1p2B1/3P4/2N1PN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Capablanca variation
+r1bq1rk1/p1pnbppp/1p3n2/3p2B1/3P4/2NBPN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Pillsbury attack
+r1bq1rk1/p1ppbppp/8/2p1P3/3B4/2N5/PPP1QPPP/R3R1K1 w - -
+Ruy Lopez: Berlin defense, Rio de Janeiro variation
+r1bq1rk1/p2nbppp/1pp1pn2/3p4/P1PP4/5NP1/1PQ1PPBP/RNBR2K1 b - -
+Catalan: closed, Zagoryansky variation
+r1bq1rk1/p2nbppp/2p1pn2/1p4B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line, fianchetto variation
+r1bq1rk1/p2pppbp/1pn2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with b3 *
+r1bq1rk1/p3bppp/2n2n2/1pp1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, bayonet attack *
+r1bq1rk1/p3nppp/2p5/2bpp3/8/1P4P1/P1PQPPBP/RNB2RK1 b - -
+Gr\"unfeld: exchange, Larsen variation *
+r1bq1rk1/p3ppbp/1pn2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky variation with b3 *
+r1bq1rk1/p4ppp/2n2n2/2bpp1B1/8/1BNP4/PPP2PPP/R2QK1NR b KQ -
+Evans gambit *
+r1bq1rk1/p4ppp/2n2n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Morphy attack *
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NPP/PP3PB1/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical main line
+r1bq1rk1/pp1n1pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Benoni: fianchetto, 9...Nbd7
+r1bq1rk1/pp1n1pp1/2p1pb1p/8/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - -
+QGD: Petrosian variation
+r1bq1rk1/pp1n1ppp/1bp2n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R w KQ -
+Ruy Lopez: open, St. Petersburg variation *
+r1bq1rk1/pp1n1ppp/1bp5/3P4/1PN1p1n1/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Bernstein variation, Karpov gambit *
+r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Bronstein variation
+r1bq1rk1/pp1n1ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...Nbd7
+r1bq1rk1/pp1n2pp/2n1pp2/2bpP3/5PQ1/P1N2N2/1PP3PP/R1B1KB1R w KQ -
+French: Steinitz, Brodsky-Jones variation
+r1bq1rk1/pp1nb1pp/2n2p2/4p3/2Pp4/N2P1NP1/PP3PBP/R1BQR1K1 w - -
+Benoni: classical, 11.f3 *
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 w - -
+Benoni: classical, 9...Re8, 10.Nd2 *
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/N2P1NP1/PP3PBP/R1BQR1K1 b - -
+Benoni: classical with ...Re8 and ...Na6 *
+r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP3P/2N1PN2/PP3PP1/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line, Janowski variation
+r1bq1rk1/pp1nbppp/2p1p3/3n2B1/2BP4/2N1PN2/PP3PPP/2RQK2R w K -
+QGD: Orthodox defense, Bd3 line, Capablanca freeing maneuver
+r1bq1rk1/pp1nbppp/2p1p3/3p2B1/2PPn3/2N1PN2/PPQ2PPP/2R1KB1R w K -
+QGD: Orthodox defense, Rubinstein attack, Wolf variation
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R w K -
+QGD: Orthodox defense
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/2R1KB1R b K -
+QGD: Orthodox defense, Rubinstein attack (with Rc1)
+r1bq1rk1/pp1nbppp/2p1pn2/3p2B1/2PP4/2NBPN2/PP3PPP/2RQK2R b K -
+QGD: Orthodox defense, Bd3 line
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/1P3NP1/P1Q1PPBP/RNB2RK1 b - -
+Catalan: closed, Qc2 & b3
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/2NQ1NP1/PP2PPBP/R1B2RK1 b - -
+Catalan: closed, Botvinnik variation
+r1bq1rk1/pp1nbppp/2p1pn2/3p4/2PP4/5NP1/PPQNPPBP/R1B2RK1 b - -
+Catalan: closed, main line
+r1bq1rk1/pp1nbppp/2p4n/3pp1N1/2BPPP2/2P5/PP4PP/RNBQ1RK1 w - -
+Philidor: Hanham, Berger variation
+r1bq1rk1/pp1nbppp/2pp1n2/8/P1BpP3/2N2N2/1PP1QPPP/R1B2RK1 w - -
+Philidor: Nimzovich, Sozin variation
+r1bq1rk1/pp1nbppp/4pn2/2pP2B1/3P4/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)
+r1bq1rk1/pp1p1ppp/2n1pn2/2p5/2PP4/P1PBP3/5PPP/R1BQK1NR w KQ -
+Nimzo-Indian: S\"amisch, main line
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1P2PN2/PB1PBPPP/RN1QK2R b KQ -
+English: symmetrical, hedgehog system *
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1PN2NP1/P2PPPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with b3
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2NP1NP1/PP2PPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with d3
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+English: symmetrical, main line with d4
+r1bq1rk1/pp1pppbp/2n2np1/8/2PN4/2N1P3/PP2BPPP/R1BQK2R b KQ -
+English: Symmetrical, Keres defense *
+r1bq1rk1/pp2b1pp/2n2n2/2pp4/4pB2/1N2PP2/PPP1B1PP/RN1Q1RK1 b - -
+Alekhine's defense: four pawns attack, Korchnoi variation *
+r1bq1rk1/pp2bppp/2n1pn2/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQR1K1 b - -
+R\'eti: King's Indian attack, French variation
+r1bq1rk1/pp2bppp/2n2n2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 b - -
+QGD: Tarrasch, Prague variation, 9.Bg5
+r1bq1rk1/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+QGD: Tarrasch, Prague variation, Normal position
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation) *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/2PP1NP1/PP3PBP/RNBQ1RK1 b - -
+King's Indian: orthodox, Donner variation *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w - -
+King's Indian: orthodox variation *
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, 7...Nbd7 *
+r1bq1rk1/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 w - -
+Benoni: classical, 9.O-O *
+r1bq1rk1/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 b - -
+Benoni: classical, 9...Re8 *
+r1bq1rk1/pp2bppp/2np1n2/4p1B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w - -
+Sicilian: Richter-Rauzer, Rauzer attack, Geller variation
+r1bq1rk1/pp2bppp/2nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4
+r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/1BN1B3/PPP3PP/R2QK2R b KQ -
+Sicilian: Sozin, Fischer variation
+r1bq1rk1/pp2bppp/2nppn2/8/3NPP2/2N1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: modern Scheveningen, main line
+r1bq1rk1/pp2bppp/3ppn2/6B1/3QPP2/2N5/PPP3PP/2KR1B1R b - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
+r1bq1rk1/pp2bppp/3ppn2/6B1/3nPP2/2N5/PPPQ2PP/2KR1B1R w - -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
+r1bq1rk1/pp2bppp/n1n5/2p1p3/8/PPNPPN2/4BPPP/R1BQ1RK1 b - -
+Sicilian, Sz\'en, hedgehog variation *
+r1bq1rk1/pp2ppbp/2n2np1/2p5/2Pp4/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Yugoslav Panno *
+r1bq1rk1/pp2ppbp/2n2np1/2pp2B1/8/2NP1NP1/PPP1PPBP/R2Q1RK1 b - -
+King's Indian: fianchetto, Simagin variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with d4 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 w - -
+King's Indian: fianchetto, Yugoslav, 7.O-O *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/3P1P2/2P1PN2/PP2B1PP/RNBQ1RK1 b - -
+Dutch: stonewall with Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 w - -
+Dutch: stonewall with Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Uhlmann (Szabo) variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5B2/2NP1NP1/PPP1PPBP/R2Q1RK1 b - -
+King's Indian: fianchetto, lesser Simagin (Spassky) variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5B2/2PP1NP1/PP2PPBP/RN1Q1RK1 b - -
+King's Indian: fianchetto, Larsen system *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/2NP1NP1/PPP1P1BP/R1BQ1RK1 b - -
+Dutch: Leningrad, main variation with Nc6 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/2PP1NP1/PP2P1BP/RNBQ1RK1 b - -
+Dutch: Leningrad, main variation with c6 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 b - -
+Dutch: Ilyin-Genevsky variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/8/1P2PN2/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: old main line, 7.Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/8/P1NP1NP1/1PP1PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Panno variation *
+r1bq1rk1/pp2ppbp/2n2np1/2pp4/Q7/2PP1NP1/PP2PPBP/RNB2RK1 b - -
+King's Indian: fianchetto, Kavalek (Bronstein) variation *
+r1bq1rk1/pp2ppbp/2n2np1/3p4/2PN4/6P1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3 *
+r1bq1rk1/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+QGD: Tarrasch, Prague variation, Normal position *
+r1bq1rk1/pp2ppbp/2n2np1/8/2Pp4/3P1NP1/PP1N1PBP/R1BQ1RK1 b - -
+Benoni: fianchetto, 9...Nbd7 *
+r1bq1rk1/pp2ppbp/2n3p1/8/2BPP3/4B3/P3NPPP/R2Q1RK1 b - -
+Gr\"unfeld: Spassky variation, main line, 10...cd, 11.cd
+r1bq1rk1/pp2ppbp/2np1np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+English: symmetrical, main line with d3 *
+r1bq1rk1/pp2ppbp/2np1np1/2pP4/2P5/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Yugoslav Panno
+r1bq1rk1/pp2ppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R b KQ -
+Sicilian: dragon, Yugoslav attack, 9.Bc4
+r1bq1rk1/pp2ppbp/2np1np1/8/2PNPP2/2N1B3/PP2B1PP/R2QK2R b KQ -
+King's Indian: Four pawns attack, main line
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/2KR3R b - -
+Sicilian: dragon, classical, Grigoriev variation
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R4RK1 b - -
+Sicilian: dragon, classical, Richter variation
+r1bq1rk1/pp2ppbp/2np1np1/8/3NP3/2N1BP2/PPPQ2PP/2KR1B1R b - -
+Sicilian: dragon, Yugoslav attack, Rauser variation
+r1bq1rk1/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2Q1RK1 b - -
+Sicilian: dragon, classical, 9.Nb3
+r1bq1rk1/pp2ppbp/5np1/n7/2BP4/2N2N2/PP3PPP/R1BQ1RK1 w - -
+QGD: Tarrasch, R\'eti variation *
+r1bq1rk1/pp3pb1/2n2npp/2ppp3/4P3/2PP1NP1/PP1N1PBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical main line *
+r1bq1rk1/pp3pbp/2n2np1/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical variation, 8.e4 *
+r1bq1rk1/pp3ppp/2B2n2/2b1N3/3p4/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: M\"oller (Therkatz) attack *
+r1bq1rk1/pp3ppp/2B2n2/2bpN3/8/2N5/PPPP1PPP/R1BQK2R b KQ -
+Giuoco Piano *
+r1bq1rk1/pp3ppp/2N2n2/1Bbp4/8/2N5/PPPP1PPP/R1BQK2R b KQ -
+Giuoco Piano: Greco variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP1N1PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Bronstein variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP2QPPP/RNB2RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Smyslov variation *
+r1bq1rk1/pp3ppp/2n1pn2/1Bbp4/2P5/4PN2/PP3PPP/RNBQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...dc *
+r1bq1rk1/pp3ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line
+r1bq1rk1/pp3ppp/2n1pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 7...Nc6
+r1bq1rk1/pp3ppp/2n1pn2/2pp4/2PP4/P1PBPN2/5PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 8...Bxc3
+r1bq1rk1/pp3ppp/2n1pn2/8/1bBp4/P1N1PN2/1P3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, main line with 8...dc and 9...cd
+r1bq1rk1/pp3ppp/2n2n2/2bp4/N7/5NP1/PP2PPBP/R1BQ1RK1 b - -
+QGD: Tarrasch, R\'eti variation
+r1bq1rk1/pp3ppp/2nbpn2/1BPp4/8/2N1PN2/PPP2PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Ragozin variation *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/1P2PN2/P4PPP/RNBQ1RK1 b - -
+Nimzo-Indian: 4.e3, Keres variation *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, main line with 7...Nc6 *
+r1bq1rk1/pp3ppp/2nbpn2/1Bpp4/2PP4/4PN2/PP1N1PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...Nbd7 *
+r1bq1rk1/pp3ppp/2nbpn2/2pp2B1/3P4/2P2NP1/PP2PPBP/RN1Q1RK1 b - -
+Gr\"unfeld: Smyslov defense *
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 b - -
+QGD: Semi-Tarrasch, symmetrical variation *
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+QGD: Semi-Tarrasch, symmetrical variation
+r1bq1rk1/pp3ppp/2nbpn2/2pp4/3P1B2/2P2NP1/PP2PPBP/RN1Q1RK1 b - -
+Gr\"unfeld: Flohr defense *
+r1bq1rk1/pp3ppp/3b4/3P4/1P2n3/4PN2/5PPP/R1BQKB1R w KQ -
+QGD semi-Slav: Meran, Sozin variation *
+r1bq1rk1/pp4bp/2nppnp1/2p5/2P1PPPP/2N5/PP2B3/R1BQK1NR b KQ -
+King's Indian: Six pawns attack
+r1bq1rk1/ppbn1Npp/2p2n2/8/1PBPp3/P1N1B3/2P2PPP/R2Q1RK1 b - -
+Ruy Lopez: open, Dilworth variation *
+r1bq1rk1/ppp1b1pp/2n5/3npp2/8/P1NPPN2/1PQ2PPP/R1B1KB1R b KQ -
+Sicilian: Scheveningen, classical variation with ...Qc7 and ...Nc6 *
+r1bq1rk1/ppp1bppp/2n1pn2/8/3PN3/P5N1/1PP1BPPP/R1BQK2R w KQ -
+French: Winawer, Alekhine gambit, Alatortsev variation
+r1bq1rk1/ppp1bppp/2n5/3np3/8/P2PPN2/1P1N1PPP/R1BQKB1R b KQ -
+Sicilian: Scheveningen, classical, Nd7 system *
+r1bq1rk1/ppp1bppp/2n5/3np3/8/P2PPN2/1PQ2PPP/RNB1KB1R b KQ -
+Sicilian: Scheveningen (Paulsen), classical variation *
+r1bq1rk1/ppp1npbp/3p1np1/3Pp3/1PP1P3/2N2N2/P3BPPP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, bayonet attack
+r1bq1rk1/ppp1npbp/3p1np1/3Pp3/2P1P3/2N5/PP2BPPP/R1BQNRK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, 9.Ne1
+r1bq1rk1/ppp1nppN/3p4/3P4/2B1R3/8/PP3PPP/R2Q2K1 b - -
+Giuoco Piano: Therkatz-Herzog variation
+r1bq1rk1/ppp1nppp/3p1n2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Pillsbury variation
+r1bq1rk1/ppp1nppp/3p1n2/1B2p3/1b1PP3/2N2N2/PPP1QPPP/R1B2RK1 b - -
+Four knights: Alatortsev variation *
+r1bq1rk1/ppp1nppp/3p1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: symmetrical, Mar\'oczy system *
+r1bq1rk1/ppp1p1bp/2np1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Leningrad, main variation with Nc6
+r1bq1rk1/ppp1ppbp/2n2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Byrne (Simagin) variation
+r1bq1rk1/ppp1ppbp/2n3p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Simagin's improved variation
+r1bq1rk1/ppp1ppbp/2np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto with ...Nc6
+r1bq1rk1/ppp1ppbp/2np1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, 6...Nc6
+r1bq1rk1/ppp1ppbp/n2p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Kazakh variation
+r1bq1rk1/ppp1ppbp/n4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Prins variation
+r1bq1rk1/ppp2pbp/2np1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Uhlmann (Szabo) variation
+r1bq1rk1/ppp2pbp/2np1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)
+r1bq1rk1/ppp2ppp/1b1p1n2/4p3/N3P3/3P1B2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: Rubinstein counter-gambit Mar\'oczy variation
+r1bq1rk1/ppp2ppp/2Bp1n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights *
+r1bq1rk1/ppp2ppp/2n1pn2/8/1bpP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Ragozin variation
+r1bq1rk1/ppp2ppp/2n2n2/1B1pp3/4P3/2PP1N2/P1P2PPP/R1BQ1RK1 w - -
+Four knights: Svenonius variation
+r1bq1rk1/ppp2ppp/2n2n2/3Pp3/1b6/2NP1N2/PPPB1PPP/R2QKB1R b KQ -
+Ruy Lopez: closed Berlin defense, Wolf variation *
+r1bq1rk1/ppp2ppp/2n2n2/3pp3/1b2P3/2NP1N2/PPPBBPPP/R2QK2R b KQ -
+Ruy Lopez: Berlin defense, hedgehog variation *
+r1bq1rk1/ppp2ppp/2n2n2/3pp3/4P3/2bP1N2/PPPBBPPP/R2QK2R w KQ -
+Ruy Lopez: closed Berlin defense, Showalter variation *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: double Ruy Lopez *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: symmetrical variation *
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: symmetrical variation
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/1b2P3/3P1N2/PPP1NPPP/R1BQ1RK1 b - -
+Four knights: symmetrical, Mar\'oczy system
+r1bq1rk1/ppp2ppp/2np1n2/1B2p3/4P3/2PP1N2/P1P2PPP/R1BQR1K1 b - -
+Four knights: Janowski variation
+r1bq1rk1/ppp2ppp/3p1b2/n3p3/4P3/1B1P1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: Rubinstein counter-gambit Mar\'oczy variation *
+r1bq1rk1/ppp3pp/2n2P2/2bp1PB1/8/2p5/PPP2P1P/R2QKBNR w KQ -
+Vienna: Pierce gambit, Rushmere attack *
+r1bq1rk1/ppp3pp/2n5/1B1p1p2/1b2p3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Bardeleben variation *
+r1bq1rk1/pppn1pb1/3p3p/3Pp1pn/2P1P2P/2N2NB1/PP2BPP1/R2QK2R b KQ -
+King's Indian: Petrosian system, Keres variation
+r1bq1rk1/pppn1pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Petrosian system, main line
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, classical variation
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, 7...Nbd7
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQR1K1 b - -
+King's Indian: orthodox, 7...Nbd7, 8.Re1
+r1bq1rk1/pppn1pbp/3p1np1/4p3/2PPP3/2N2NP1/PP3PBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, classical variation, 8.e4
+r1bq1rk1/pppn1ppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Bernstein variation *
+r1bq1rk1/pppnbBpp/3p1n2/4p1N1/3PP3/2N5/PPP2PPP/R1BQK2R b KQ -
+Philidor: Nimzovich, L\"arobok variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/1QN1PN2/PP3PPP/R3KB1R b KQ -
+QGD: Orthodox defense, Rauzer variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/2RQKB1R b K -
+QGD: Orthodox defense, 7.Rc1
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Orthodox defense
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Orthodox defense, Rubinstein variation
+r1bq1rk1/pppnbppp/4pn2/3p2B1/2PP4/2NBPN2/PP3PPP/R2QK2R b KQ -
+QGD: Orthodox defense, Botvinnik variation
+r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Catalan: closed, 6...Nbd7
+r1bq1rk1/pppnbppp/4pn2/3p4/2PP4/5NP1/PPQ1PPBP/RNB2RK1 b - -
+Catalan: closed, 7.Qc2
+r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P1P1/2N2P2/PP2B2P/R1BQNRK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, Benk\"o attack
+r1bq1rk1/pppnn1bp/3p2p1/3Ppp2/2P1P3/2N2P2/PP2B1PP/R1BQNRK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, main line
+r1bq1rk1/pppnppbp/3p1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto with ...Nd7
+r1bq1rk1/pppnppbp/5np1/6N1/2BP4/1QN1P3/PP3PPP/R1B1K2R b KQ -
+Gr\"unfeld: Pachman variation
+r1bq1rk1/pppp1ppp/1bn2n2/1B2p3/3PP3/2P2N2/PP3PPP/RNBQ1RK1 w - -
+Ruy Lopez: classical defense, Benelux variation
+r1bq1rk1/pppp1ppp/2B2n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Nimzovich (Paulsen) variation
+r1bq1rk1/pppp1ppp/2n2n2/1B2P3/1b1P1P2/2N5/PPP3PP/R1BQ1RK1 w - -
+Four knights: Bardeleben variation
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 b - -
+Four knights: double Ruy Lopez
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2b2N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Nimzovich (Paulsen) variation *
+r1bq1rk1/pppp1ppp/2n2n2/1B2p3/4P3/2bP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights
+r1bq1rk1/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQ -
+Four knights: Rubinstein counter-gambit, Henneberger variation *
+r1bq1rk1/pppp1ppp/2n2n2/b3N3/2BPP3/2P5/P4PPP/RNBQ1RK1 b - -
+Evans gambit: Richardson attack
+r1bq1rk1/pppp1ppp/2n2n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Knorre variation *
+r1bq1rk1/pppp1ppp/2n5/1B1P4/1b2p3/5N2/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Gunsberg counter-attack
+r1bq1rk1/pppp1ppp/2n5/3Np3/1bB1n3/5N2/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Marshall variation *
+r1bq1rk1/pppp1ppp/5n2/1B2P3/1b1p4/2N5/PPPP1PPP/R1BQ1RK1 b - -
+Four knights: Gunsberg counter-attack *
+r1bq1rk1/pppp1ppp/5n2/1Bb1N3/3nP3/2N5/PPPP1PPP/R1BQ1RK1 w - -
+Four knights: Marshall variation
+r1bq1rk1/pppp1ppp/5n2/4n1N1/1bB5/8/PB3PPP/RN1Q1RK1 w - -
+Scotch gambit: Hanneken variation
+r1bq1rk1/pppp2pp/2n2n2/2b1pPP1/8/2N5/PPPP1P1P/R1BQKBNR w KQ -
+Vienna: Hamppe-Muzio gambit *
+r1bq2k1/pp3p1p/5n2/2b1r1p1/3p4/3P1B2/PPP1NPPP/R1BQK2R w KQ -
+Giuoco Piano: M\"oller, bayonet attack *
+r1bq3r/pp3pkp/2n2np1/4p3/2Pp4/3P1NP1/4PPBP/RN1Q1RK1 w - -
+Benk\"o gambit: main line *
+r1bq3r/ppp2k1p/2n3p1/2Qp4/3pP3/8/PPP2PPP/RNB1K2R w KQ -
+Scotch gambit: Cochrane-Shumov defense
+r1bq3r/ppp3pp/5k2/3pN3/1n1Pn3/1Q3P2/PP4PP/RN2K2R b KQ -
+Giuoco Piano: Krause variation
+r1bqk1nr/1ppp1ppp/p1n5/2b1p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Classical defense deferred
+r1bqk1nr/1ppp1ppp/p1n5/4p3/Bb2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Alapin's defense deferred
+r1bqk1nr/1ppp1ppp/pbn5/4p3/PPB1P3/2N2N2/2PP1PPP/R1BQK2R b KQkq -
+Evans gambit declined, Showalter variation
+r1bqk1nr/2pp1ppp/p1n5/1pb1p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Graz variation
+r1bqk1nr/5ppp/p1pbp3/2pp4/2P5/2N1PN2/PP1P1PPP/R1BQ1RK1 b kq -
+Nimzo-Indian: S\"amisch, main line *
+r1bqk1nr/5ppp/p1pbp3/2pp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3, Botvinnik system *
+r1bqk1nr/p1pp1ppp/2n5/bp2p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit: Leonhardt variation
+r1bqk1nr/p4ppp/2p5/2bpp3/8/6P1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: exchange, classical variation *
+r1bqk1nr/pp1n1ppp/2pb4/3p4/2PPp3/1P2P3/P2N1PPP/RNBQKB1R b KQkq -
+French: Tarrasch, Botvinnik variation *
+r1bqk1nr/pp1n1ppp/2pb4/3p4/2PPp3/2N1P3/PP1N1PPP/R1BQKB1R b KQkq -
+French: Tarrasch, closed variation *
+r1bqk1nr/pp1nbppp/2pp4/4P3/2B1P3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Philidor: Hanham, Steiner variation
+r1bqk1nr/pp1p1pbp/2n1p1p1/2p2P2/2B1P3/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+Sicilian: Grand Prix attack, Schofman variation
+r1bqk1nr/pp1p1pbp/2n1p1p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system reversed *
+r1bqk1nr/pp1p1pbp/2n3p1/1Bp1p3/1P2P3/5N2/P1PP1PPP/RNBQR1K1 b kq -
+Sicilian: Nimzovich-Rossolimo attack, Gurgenidze variation
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+English: symmetrical, Botvinnik system reversed
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: symmetrical, Botvinnik system reversed
+r1bqk1nr/pp1p1pbp/2n3p1/2p1p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical, Botvinnik system *
+r1bqk1nr/pp1p1pbp/4p1p1/2p5/3nP3/3PB1P1/PPP1NPBP/R2QK1NR b KQkq -
+Sicilian: closed, Smyslov variation
+r1bqk1nr/pp1p1ppp/2n5/2b5/2pNp3/3PP3/PPP2PPP/RNBQKB1R b KQkq -
+Alekhine's defense: two pawns' attack, Mikenas variation *
+r1bqk1nr/pp1pppbp/2N3p1/8/8/6P1/PPP1PP1P/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld, Smyslov defense *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq -
+English: symmetrical variation
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR b KQkq -
+English: ultra-symmetrical variation *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: ultra-symmetrical variation
+r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR b KQkq -
+English: closed system *
+r1bqk1nr/pp1pppbp/2n3p1/2p5/4P3/2NPB3/PPP2PPP/R2QKBNR b KQkq -
+English, Tr\"oger defense *
+r1bqk1nr/pp1pppbp/2n3p1/8/2P5/8/PPN1PPPP/RNBQKB1R b KQkq -
+English: symmetrical, Rubinstein system *
+r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/4B3/PP3PPP/RN1QKB1R b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 6.Be3
+r1bqk1nr/pp1pppbp/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 5...Bg7
+r1bqk1nr/pp1pppbp/2n3p1/8/8/1N4P1/PPP1PP1P/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld, Czech defense *
+r1bqk1nr/pp2b1pp/2n5/2pppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, 6.Be2 *
+r1bqk1nr/pp2b3/2n5/2p1pppp/2P5/2NPPNP1/PP4BP/R1BQ1RK1 w kq -
+King's Indian: Six pawns attack *
+r1bqk1nr/pp2bppp/2n5/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: 5.Be2 *
+r1bqk1nr/pp2ppbp/2n3p1/2pp4/5P2/2PP1N2/PPQ1P1PP/RNB1KB1R b KQkq -
+Dutch: Hort-Antoshin system *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQkq -
+English: closed system (without ...d6) *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR b KQkq -
+English: closed system *
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -
+Sicilian: closed
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -
+Sicilian: closed, 6.Be3
+r1bqk1nr/pp2ppbp/2np2p1/2p5/4PP2/2NP2P1/PPP3BP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.f4
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP1NPBP/R1BQK2R w KQkq -
+Sicilian: closed, 6.Ne2 e5 (Botvinnik)
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQkq -
+English: Botvinnik system *
+r1bqk1nr/pp3pbp/2np2p1/2p1p3/4PP2/2NP2P1/PPP3BP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.f4 e5 (Botvinnik)
+r1bqk1nr/pp3ppp/2nbp3/1Bpp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5 *
+r1bqk1nr/pp3ppp/2nbp3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 *
+r1bqk1nr/pp3ppp/2nbp3/2pp4/4P3/3P1N2/PPPN1PPP/R1BQKB1R w KQkq -
+Old Indian: Dus-Khotimirsky variation *
+r1bqk1nr/pp3ppp/8/1Pb1p3/1nPp4/3P1N2/4PPPP/RNBQKB1R w KQkq -
+Benk\"o gambit: Nescaf\'e Frapp\'e attack *
+r1bqk1nr/pp4pp/2n5/4pp2/1bPp4/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: Taimanov variation *
+r1bqk1nr/ppp1bp1p/2n5/3pp1p1/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: Chinese variation *
+r1bqk1nr/ppp1bpp1/2n5/3pp2p/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: bayonet (Mariotti) attack *
+r1bqk1nr/ppp1bppp/2n5/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc defense *
+r1bqk1nr/ppp1ppbp/2np2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Modern defense: Averbakh system, Kotov variation
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+English: Botvinnik system
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq -
+Sicilian: closed *
+r1bqk1nr/ppp2pbp/2np2p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+English: closed system
+r1bqk1nr/ppp2ppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 b kq -
+Evans gambit: Ulvestad variation
+r1bqk1nr/ppp2ppp/1b1p4/n5B1/2BPP3/2N2N2/P4PPP/R2Q1RK1 b kq -
+Evans gambit: G\"oring attack
+r1bqk1nr/ppp2ppp/1bnp4/4p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Lasker defense
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/2N2N2/P4PPP/R1BQ1RK1 b kq -
+Evans gambit: Morphy attack
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: normal variation
+r1bqk1nr/ppp2ppp/1bnp4/8/2BPP3/5N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: LaBourdonnais variation
+r1bqk1nr/ppp2ppp/2n1p3/8/3Pp3/P1N5/1PP2PPP/R1BQKB1R w KQkq -
+French: Winawer, Alekhine gambit, Kan variation
+r1bqk1nr/ppp2ppp/2n5/2bpp3/1PB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -
+Evans counter-gambit
+r1bqk1nr/ppp2ppp/2n5/2bpp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Holmov system *
+r1bqk1nr/ppp2ppp/2nb4/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Swiss variation *
+r1bqk1nr/ppp2ppp/2np4/b3p1B1/2BPP3/2P2N2/P4PPP/RN1QK2R b KQkq -
+Evans gambit: Sokolsky variation
+r1bqk1nr/ppp2ppp/2np4/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 w kq -
+Evans gambit
+r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/1QP2N2/P4PPP/RNB1K2R b KQkq -
+Evans gambit: Tartakower attack
+r1bqk1nr/ppp2ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/ppp2ppp/2np4/b7/2BpP3/1QP2N2/P4PPP/RNB2RK1 b kq -
+Evans gambit: Waller attack
+r1bqk1nr/ppp2ppp/3b4/3pn3/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Alekhine gambit *
+r1bqk1nr/ppp2ppp/8/2bp4/8/2P2P2/PP3PPP/RNBQKB1R w KQkq -
+Caro-Kann: Forg\'acs variation *
+r1bqk1nr/ppp3bp/2np2p1/4pp2/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.f4 e5 (Botvinnik) *
+r1bqk1nr/ppp3bp/2np2p1/4pp2/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.f4 *
+r1bqk1nr/ppp3pp/1b1p1p2/n7/2BPP3/2N1BN2/P4PPP/R2Q1RK1 b kq -
+Evans gambit: Steinitz variation
+r1bqk1nr/ppp3pp/2n5/2bppp2/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: Austrian attack, Ljubojevi\'c variation *
+r1bqk1nr/pppn1ppp/3p4/2b1p3/4PP2/2N2N2/PPPP2PP/R1BQKB1R w KQkq -
+KGD: classical, Hanham variation
+r1bqk1nr/pppp1Bpp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Giuoco Piano: Jerome gambit
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR b Kkq -
+English: closed, 5.Rb1
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: closed system
+r1bqk1nr/pppp1pbp/2n3p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR b KQkq -
+English: closed system (without ...d6)
+r1bqk1nr/pppp1ppp/1bn5/1B2p3/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical defense, Charousek variation
+r1bqk1nr/pppp1ppp/1bn5/4p3/1PB1P3/5N2/PBPP1PPP/RN1QK2R b KQkq -
+Evans gambit declined, Cordel variation
+r1bqk1nr/pppp1ppp/1bn5/4p3/PPB1P3/5N2/2PP1PPP/RNBQK2R b KQkq -
+Evans gambit declined, 5.a4
+r1bqk1nr/pppp1ppp/2n5/1B2p3/1b2P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Alapin's defense
+r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: classical defense, 4.c3
+r1bqk1nr/pppp1ppp/2n5/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: classical (Cordel) defense
+r1bqk1nr/pppp1ppp/2n5/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b1p3/1PB1P3/5N2/P1PP1PPP/RNBQK2R b KQkq -
+Evans gambit declined
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Giuoco Pianissimo
+r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Giuoco Piano
+r1bqk1nr/pppp1ppp/2n5/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna game *
+r1bqk1nr/pppp1ppp/2n5/2b3N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/2b5/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch game
+r1bqk1nr/pppp1ppp/2n5/2b5/4P3/1N6/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Potter variation
+r1bqk1nr/pppp1ppp/2n5/4p3/1bB1P3/5N2/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/8/1b2P3/1N6/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Romanishin variation
+r1bqk1nr/pppp1ppp/2n5/8/1b2P3/2N2N2/PP3PPP/R1BQKB1R w KQkq -
+Scotch: G\"oring gambit
+r1bqk1nr/pppp1ppp/2n5/8/1bB1P3/2P2N2/P4PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/8/1bBpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit
+r1bqk1nr/pppp1ppp/2n5/b3P3/2B5/2P2N2/P4PPP/RNBQK2R b KQkq -
+Scotch gambit: Cochrane variation
+r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQ1RK1 b kq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/b3p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit
+r1bqk1nr/pppp1ppp/2n5/b7/2B1P3/2p2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: compromised defense
+r1bqk1nr/pppp1ppp/2nb4/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: Stone-Ware variation
+r1bqk1nr/pppp1ppp/8/1Bb1p3/1P1nP3/5N2/P1PP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: classical defense, Zaitsev variation
+r1bqk1nr/pppp2pp/2n5/1Bb1pp2/4P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cordel gambit
+r1bqk1nr/pppp2pp/2n5/1Bb2P2/4p3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+KGA: bishop's gambit, Paulsen attack *
+r1bqk1nr/pppp2pp/2n5/2b1p1N1/2B1Pp2/3P4/PPP2PPP/RNBQK2R w KQkq -
+Giuoco Pianissimo: Dubois variation
+r1bqk1nr/pppp2pp/2n5/2b1pP2/8/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Jaenisch variation *
+r1bqk1nr/pppp2pp/2n5/2b1pP2/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+KGA: bishop's gambit, Bogolyubov variation *
+r1bqk1nr/ppppbppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Lucena defense
+r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: 5...Be7
+r1bqk1nr/ppppbppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Hungarian defense
+r1bqk1nr/ppppbppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: Romanishin variation
+r1bqk1nr/ppppbppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit: Benima defense
+r1bqk1nr/ppppbppp/2n5/8/4P3/2P1Q3/PP3PPP/RNB1KBNR w KQkq -
+Center game: Charousek variation
+r1bqk1nr/ppppbppp/8/n3p3/2BPP3/2P2N2/P4PPP/RNBQK2R w KQkq -
+Evans gambit: Cordel variation
+r1bqk2r/1p1p1ppp/p1n1pn2/8/1bPNP3/2N5/PPB2PPP/R1BQK2R b KQkq -
+Sicilian: Kan, Mar\'oczy bind - Bronstein variation
+r1bqk2r/1pp1bppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQR1K1 w kq -
+Ruy Lopez: closed, Averbach variation
+r1bqk2r/1pp1bppp/p5n1/3pn3/8/2N1PN2/PPP1BPPP/R1BQ1RK1 b kq -
+French: Winawer, Alekhine gambit, Alatortsev variation *
+r1bqk2r/1ppn1p1p/p4b1Q/1B6/8/2N2N2/PP1P1PPP/n1BK3R w kq -
+Scotch: Berger variation *
+r1bqk2r/1ppp1ppp/p1n2n2/2b1p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: M\"oller defense
+r1bqk2r/1pppbppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Exchange variation doubly deferred (DERLD)
+r1bqk2r/1pppbppp/p1n2n2/4p3/B2PP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: closed, center attack
+r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: closed defense
+r1bqk2r/1pppbppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB2RK1 b kq -
+Ruy Lopez: Worrall attack
+r1bqk2r/1pppbppp/p1n5/4P3/B2pn3/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: closed, Basque gambit (North Spanish variation)
+r1bqk2r/2p1bppp/p1np1n2/1p2p3/3PP3/1B3N2/PPP2PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed, 7...d6, 8.d4
+r1bqk2r/2p1bppp/p1np1n2/1p2p3/4P3/1B3N2/PPPPQPPP/RNB2RK1 w kq -
+Ruy Lopez: Worrall attack, solid line
+r1bqk2r/2pp1ppp/2n2n2/ppb1p3/4P3/PBN5/1PPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, Showalter variation *
+r1bqk2r/2ppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 b kq -
+Ruy Lopez: closed
+r1bqk2r/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Wing attack
+r1bqk2r/4bppp/p2p1n2/1pp5/3QP3/1B6/PPP2PPP/RNB1R1K1 w kq -
+Ruy Lopez: Noah's ark trap
+r1bqk2r/4nppp/p1pb4/2ppp3/2P5/1PN1P3/P2P1PPP/R1BQNRK1 b kq -
+Nimzo-Indian: S\"amisch, Capablanca variation *
+r1bqk2r/5ppp/p1n1pn2/1pb1P3/2B5/5N2/PP2QPPP/RNB2RK1 b kq -
+QGA: classical, Furman variation
+r1bqk2r/p1ppbppp/2p5/4Pn2/8/5N2/PPP1QPPP/RNB2RK1 w kq -
+Ruy Lopez: Berlin defense, Cordel variation
+r1bqk2r/p3nppp/2p5/2bpp3/2P5/6P1/PP2PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: exchange, Spassky variation *
+r1bqk2r/p3nppp/2p5/2bpp3/8/1P4P1/P1P1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: exchange, Simagin's lesser variation *
+r1bqk2r/p3nppp/2p5/2bpp3/8/2N3P1/PPP1PPBP/R1BQ1RK1 b kq -
+Gr\"unfeld: exchange, Simagin's improved variation *
+r1bqk2r/p4ppp/2pbpn2/2pp4/2P5/2NPPN2/PP3PPP/R1BQK2R b KQkq -
+Nimzo-Indian: e3, H\"ubner variation *
+r1bqk2r/pnppbppp/2p5/4P3/2P5/5N2/PP2QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Zukertort variation
+r1bqk2r/pnppbppp/2p5/4P3/3N4/8/PPP1QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Winawer attack
+r1bqk2r/pnppbppp/2p5/4P3/8/1P3N2/P1P1QPPP/RNB2RK1 b kq -
+Ruy Lopez: Berlin defense, Pillsbury variation
+r1bqk2r/pp1n1ppp/2p1pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Romih variation
+r1bqk2r/pp1n1ppp/2pbpn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Chigorin defense
+r1bqk2r/pp1n1ppp/3bpn2/2pp4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav: Semmering variation *
+r1bqk2r/pp1n1ppp/3bpn2/2ppN3/3P1P2/2P1P3/PP4PP/RNBQKB1R b KQkq -
+QGD: Stonewall variation *
+r1bqk2r/pp1nbppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Bogolyubov variation
+r1bqk2r/pp1nnppp/3b4/3p4/3Pp3/1NN1P3/PP3PPP/R1BQKB1R b KQkq -
+French: Tarrasch, Leningrad variation *
+r1bqk2r/pp1nnppp/3b4/3p4/3Pp3/2N1P3/PP1N1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, closed variation, main line *
+r1bqk2r/pp1p1ppp/2n1p3/2P5/1bP5/1QN2N2/PP1nPPPP/R3KB1R w KQkq -
+Nimzo-Indian: Spielmann, Karlsbad variation
+r1bqk2r/pp1p1ppp/2n1p3/2n5/1bP5/1QN2N2/PP1BPPPP/R3KB1R w KQkq -
+Nimzo-Indian: Spielmann, San Remo variation
+r1bqk2r/pp1p1ppp/2n1pn2/2P5/1bP5/1QN5/PP2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: Spielmann, 4...c5, 5.dc Nc6
+r1bqk2r/pp1p1ppp/2nNpn2/8/1b2P3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Taimanov, American attack
+r1bqk2r/pp1p1ppp/2nb1n2/2p1p3/8/1P2PN2/PBPP1PPP/RN1QKB1R w KQkq -
+English: Queens Indian, Romanishin variation *
+r1bqk2r/pp1p2pp/2n1p3/2n2p2/1bP5/2N2NP1/PPQBPP1P/R3KB1R b KQkq -
+Nimzo-Indian: Spielmann, St\aa hlberg variation
+r1bqk2r/pp1pnpbp/2n1p1p1/2p5/4P3/2NP2PN/PPP2PBP/R1BQK2R b KQkq -
+English: closed, Taimanov variation *
+r1bqk2r/pp1pnpbp/2n1p1p1/2p5/4P3/2NPB1P1/PPP2PBP/R2QK1NR b KQkq -
+English: closed, Hort variation *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P1P3/2N3P1/PP1P1PBP/R1BQK1NR b KQkq -
+English: symmetrical, Botvinnik system reversed *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R b KQkq -
+English: symmetrical variation *
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: symmetrical variation
+r1bqk2r/pp1pppbp/2n2np1/2p5/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical variation *
+r1bqk2r/pp1pppbp/2n2np1/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -
+Sicilian: accelerated fianchetto, modern variation with Bc4
+r1bqk2r/pp1pppbp/2n2np1/8/3NP3/6P1/PPP2PBP/RNBQK2R b KQkq -
+English: Anglo-Gr\"unfeld defense, Korchnoi variation *
+r1bqk2r/pp1pppbp/2n3p1/8/2PNP1n1/2N1B3/PP3PPP/R2QKB1R w KQkq -
+Sicilian: accelerated fianchetto, Breyer variation
+r1bqk2r/pp2b1pp/2n2n2/2p1pp2/2Pp4/3PPNP1/PP3PBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack *
+r1bqk2r/pp2b1pp/2n2n2/2p2p2/2PPp3/3P1NP1/PP3PBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, Florentine gambit *
+r1bqk2r/pp2b1pp/2n2n2/2pppp2/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, with Be2 and Nf3 *
+r1bqk2r/pp2b1pp/2n2n2/4pp2/2Pp4/3P1NP1/PP3PBP/RNBQR1K1 b kq -
+Benoni: four pawns attack, main line *
+r1bqk2r/pp2bppp/2n1p3/2pn4/8/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -
+English: Symmetrical, Keres defense
+r1bqk2r/pp2bppp/2n2n2/2p1p3/3pP3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Petrosian system *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/3pP3/3P1NP1/PPPN1PBP/R1BQ1RK1 b kq -
+King's Indian: Petrosian system, main line *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/4p3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Andersson variation *
+r1bqk2r/pp2bppp/2n2n2/2p1p3/P2pP3/3P1NP1/1PP2PBP/RNBQ1RK1 b kq -
+King's Indian: Petrosian system, Stein variation *
+r1bqk2r/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQK2R w KQkq -
+QGD: Tarrasch, Prague variation, 7...Be7
+r1bqk2r/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 b kq -
+King's Indian: classical variation *
+r1bqk2r/pp2bppp/2n2n2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: 6.Be2 *
+r1bqk2r/pp2bppp/2n2n2/2ppp3/8/N2P1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: Kazakh variation *
+r1bqk2r/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: classical without 9.O-O *
+r1bqk2r/pp2bppp/2n2n2/4p3/2Pp4/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: classical without 9.O-O *
+r1bqk2r/pp2bppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7
+r1bqk2r/pp2bppp/2nppn2/8/2BNP3/2N1B3/PPP1QPPP/R3K2R b KQkq -
+Sicilian: Velimirovi\'c attack
+r1bqk2r/pp2bppp/2nppn2/8/3NPP2/2N1BQ2/PPP3PP/R3KB1R b KQkq -
+Sicilian: Scheveningen, Tal variation
+r1bqk2r/pp2npbp/2n3p1/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Pomar system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/2P5/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+King's Indian: fianchetto, Yugoslav system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R w KQkq -
+Queen's Indian: anti-Queen's Indian system *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/2NP1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: fianchetto with ...Nc6 *
+r1bqk2r/pp2ppbp/2n2np1/2pp4/8/3P1NP1/PPPNPPBP/R1BQ1RK1 b kq -
+King's Indian: fianchetto with ...Nd7 *
+r1bqk2r/pp2ppbp/2n2np1/3p2B1/2PP4/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD: Tarrasch, Wagner variation *
+r1bqk2r/pp2ppbp/2n2np1/3p4/2PP4/2N2N2/PP2BPPP/R1BQK2R b KQkq -
+QGD: Tarrasch, Prague variation, 7...Be7 *
+r1bqk2r/pp2ppbp/2n2np1/8/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: fianchetto variation *
+r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPP1BPPP/R2Q1RK1 b kq -
+Sicilian: dragon, classical, 8.O-O
+r1bqk2r/pp2ppbp/2np1np1/8/3NP3/2N1B3/PPPQBPPP/R3K2R b KQkq -
+Sicilian: dragon, classical, Amsterdam variation
+r1bqk2r/pp2ppbp/2np1np1/8/4P3/1NN1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: dragon, classical, Nottingham variation
+r1bqk2r/pp2ppbp/2np2pn/8/2P1P3/8/PPN1BPPP/RNBQK2R w KQkq -
+Sicilian: accelerated fianchetto, Simagin variation
+r1bqk2r/pp3ppp/2n1pn2/2bp4/1P6/2P1PN2/P2N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran variation *
+r1bqk2r/pp3ppp/2n1pn2/2bp4/8/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 7.Bc4 *
+r1bqk2r/pp3ppp/2n2n2/1Bb1p3/8/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Scotch: G\"oring gambit, Bardeleben variation *
+r1bqk2r/pp3ppp/2n2n2/1Bbpp3/8/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: Greco's attack *
+r1bqk2r/pp3ppp/2nb1n2/1P1pp3/8/P1P1PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Pir\'c variation *
+r1bqk2r/pp3ppp/2nb1n2/3p4/1PP1p3/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, old main line *
+r1bqk2r/pp3ppp/2nb1n2/3pp3/1PP5/P3PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran *
+r1bqk2r/pp3ppp/2nb1n2/4p3/1PPp4/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Reynolds' variation *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/2PP4/4PN2/PP3PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3, main line with ...c5 *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/3P4/1P2PN2/P1P2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3, main line with ...b6 *
+r1bqk2r/pp3ppp/2nbpn2/1Bpp4/3P4/2P1PN2/PP1N1PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Romih variation *
+r1bqk2r/pp3ppp/2nbpn2/1P1p4/8/2P1PN2/P2N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: neo-Meran (Lundin variation) *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 6.Bd3 *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQK2R b KQkq -
+QGD semi-Slav: Bogolyubov variation *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/2PBPN2/PP1N1PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Chigorin defense *
+r1bqk2r/pp3ppp/2nbpn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with e3 & Bd3 *
+r1bqk2r/pp3ppp/2nbpn2/2ppN3/3P1P2/2P1P3/PP4PP/RNBQKB1R b KQkq -
+QGD semi-Slav: stonewall defense *
+r1bqk2r/pp3ppp/2nbpn2/3p4/1P6/2P1PN2/PB1N1PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Meran, Wade variation *
+r1bqk2r/pp3ppp/2nbpn2/3p4/1P6/P1P1PN2/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, 8...a6 *
+r1bqk2r/pp3ppp/2nbpn2/3p4/2PN4/2N1P3/PP3PPP/R1BQKB1R w KQkq -
+QGD: Semi-Tarrasch, 7.Bd3 *
+r1bqk2r/pp3ppp/2nppn2/2p5/2PP4/2PBPN2/P4PPP/R1BQK2R w KQkq -
+Nimzo-Indian: e3, H\"ubner variation
+r1bqk2r/pp3ppp/3b1n2/3P2N1/1n2p3/P3P3/3N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Rabinovich variation *
+r1bqk2r/pp3ppp/3b1n2/3P4/1n2N3/P3PN2/5PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Meran, Sozin variation *
+r1bqk2r/pp3ppp/3b1n2/3P4/1n2p3/P3PN2/3N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Meran, Blumenfeld variation *
+r1bqk2r/ppb2ppp/2n5/1Bpnp3/8/P1N1PN2/1P1P1PPP/R1BQK2R w KQkq -
+Sicilian: Kan, Mar\'oczy bind - Bronstein variation *
+r1bqk2r/ppp1bpp1/5n1p/3P4/2P1p3/5N2/PPP1QPPP/RNB1K2R w KQkq -
+two knights defense: Mar\'oczy variation
+r1bqk2r/ppp1bppp/1nn5/4p3/4P3/2NP1N2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Boleslavsky variation, 7.Nb3 *
+r1bqk2r/ppp1bppp/2n2n2/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: classical system, 5.Be2 *
+r1bqk2r/ppp1bppp/2n5/1B1pp3/3Pn3/5N2/PPP1QPPP/RNB2RK1 w kq -
+Ruy Lopez: Berlin defense, Trifunovi\'c variation
+r1bqk2r/ppp1bppp/2n5/3np3/4P3/2NP1N2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Boleslavsky variation *
+r1bqk2r/ppp1bppp/2n5/3np3/8/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: classical *
+r1bqk2r/ppp1bppp/2n5/3np3/8/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: modern Scheveningen *
+r1bqk2r/ppp1bppp/2n5/3np3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, 6.Be2 *
+r1bqk2r/ppp1bppp/2n5/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Opo\v censky variation *
+r1bqk2r/ppp1bppp/2n5/3np3/8/P2PPN2/1P3PPP/RNBQKB1R b KQkq -
+Sicilian: Scheveningen (Paulsen), classical variation *
+r1bqk2r/ppp1bppp/2n5/3p4/2PPn3/3B1N2/PP3PPP/RNBQ1RK1 b kq -
+Petrov: classical attack, Jaenisch variation
+r1bqk2r/ppp1bppp/2n5/3p4/3Pn3/3B1N2/PPP2PPP/RNBQR1K1 b kq -
+Petrov: classical attack, Chigorin variation
+r1bqk2r/ppp1bppp/2n5/4p3/4P3/2nP1N2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Boleslavsky, Louma variation *
+r1bqk2r/ppp1npbp/2np2p1/4p3/2P1P3/2NP2P1/PP3PBP/R1BQK1NR b KQkq -
+Sicilian: closed, 6.Ne2 e5 (Botvinnik) *
+r1bqk2r/ppp1nppp/1b1p4/n2P4/2B1P3/5N2/PB3PPP/RN1Q1RK1 w kq -
+Evans gambit: Paulsen variation
+r1bqk2r/ppp1nppp/3p1b2/3P4/2B1R1P1/5N2/PP3P1P/R1BQ2K1 b kq -
+Giuoco Piano: M\"oller, bayonet attack
+r1bqk2r/ppp2pbp/2np2pn/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -
+English: closed, Taimanov variation
+r1bqk2r/ppp2pp1/5n1p/2bP4/2P1p3/8/PPPNQPPP/RNB1K2R b KQkq -
+two knights defense: Yankovich variation
+r1bqk2r/ppp2ppp/1bn5/3np3/1P6/P2PPN2/5PPP/RNBQKB1R b KQkq -
+Sicilian: Sozin with ...a6 and ...b5 *
+r1bqk2r/ppp2ppp/2n1pn2/3p4/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Botvinnik variation
+r1bqk2r/ppp2ppp/2n2n2/2bpP3/2Bp4/2P2N2/PP3PPP/RNBQK2R w KQkq d6
+Giuoco Piano
+r1bqk2r/ppp2ppp/2n2n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Schlechter variation *
+r1bqk2r/ppp2ppp/2n2n2/3pp3/4P3/2bP1N2/PPPB1PPP/R2QKB1R w KQkq -
+Ruy Lopez: old Steinitz defense, Nimzovich attack *
+r1bqk2r/ppp2ppp/2n5/1B1pP3/1b1Pn3/5N2/PP3PPP/RNBQK2R w KQkq -
+Giuoco Piano: Anderssen variation
+r1bqk2r/ppp2ppp/2n5/2b5/4p3/2PP1NP1/P3PP1P/R1BQKB1R w KQkq -
+Sicilian: Magnus Smith trap *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/1QNP1N2/PP2PPPP/R1B1KB1R b KQkq -
+Sicilian: Sozin, Benk\"o variation *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: Sozin, not Scheveningen *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Sozin, Leonhardt variation *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Sozin attack *
+r1bqk2r/ppp2ppp/2n5/2bnp3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Lipnitzky attack *
+r1bqk2r/ppp2ppp/2n5/3np1N1/1bBP4/8/PPP2PPP/RNBQK2R w KQkq -
+two knights defense: Pincus variation
+r1bqk2r/ppp2ppp/2n5/3np3/1b2P3/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Venice attack *
+r1bqk2r/ppp2ppp/2n5/3np3/1b6/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, Vitoli\'n\'s variation *
+r1bqk2r/ppp2ppp/2n5/3p4/2BP4/1Qb2N2/P4PPP/R1B2RK1 w kq -
+Giuoco Piano: Bernstein variation
+r1bqk2r/ppp2ppp/2n5/3p4/2BPn3/B1P2N2/P4PPP/R2Q1RK1 b kq -
+Giuoco Piano: Steinitz variation
+r1bqk2r/ppp2ppp/2n5/3pp3/2PPn3/P3P3/1PQ2PPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, San Remo variation
+r1bqk2r/ppp2ppp/2n5/3pp3/4P1n1/3P1N2/PPPNBbPP/R1BQ1RK1 w kq -
+Philidor: Nimzovich, L\"arobok variation *
+r1bqk2r/ppp2ppp/2nb4/1B1np3/4P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Pin, Jaffe variation *
+r1bqk2r/ppp2ppp/2np1n2/2b1p1B1/2B1P3/2NP1N2/PPP2PPP/R2QK2R b KQkq -
+Giuoco Pianissimo: Canal variation
+r1bqk2r/ppp2ppp/2np1n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Pianissimo: Italian four knights variation *
+r1bqk2r/ppp2ppp/2np1n2/4p3/4P3/P1P2P2/1PP3PP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange, Romanovsky variation *
+r1bqk2r/ppp2ppp/2nppn2/8/1bPP4/2N2N2/PPQ1PPPP/R1B1KB1R w KQkq -
+Nimzo-Indian: classical, Milner-Barry (Zurich) variation
+r1bqk2r/ppp2ppp/3p1n2/4p1B1/2BnP3/8/PPP2PPP/RN1Q1RK1 w kq -
+Giuoco piano
+r1bqk2r/ppp3p1/2n5/2bppPPp/4n2P/7B/PPPP1P1R/RNBQK1N1 w Qkq -
+KGA: Kieseritsky, long whip defense, Jaenisch variation *
+r1bqk2r/ppp3pp/2nb1n2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.Bd3 *
+r1bqk2r/pppn1ppp/4pn2/3p2B1/1bPP4/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: Manhattan variation
+r1bqk2r/pppn1ppp/5n2/2bP4/8/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, Eliskases variation *
+r1bqk2r/pppnbppp/3p1n2/4p3/3P4/2N1PN2/PPP2PPP/R1BQKB1R w KQkq -
+French: Reversed Philidor formation *
+r1bqk2r/pppnbppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Inverted Hanham *
+r1bqk2r/pppp1p2/5n1p/4p1p1/2BnPP1B/8/PPP3PP/RN1Q1RK1 b kq -
+Giuoco piano: Rosentreter variation
+r1bqk2r/pppp1pbp/2n3pn/4p3/2P5/2N3P1/PP1PPPBP/1RBQK1NR w Kkq -
+English: closed, 5.Rb1 Taimanov variation
+r1bqk2r/pppp1pp1/5n1p/4n3/2PN3B/2P5/P3PPPP/R2QKB1R w KQkq -
+English: Nenarokov variation
+r1bqk2r/pppp1ppp/1b5n/nP2N3/2B1P3/8/P1PP1PPP/RNBQK2R w KQkq -
+Evans gambit declined, Lange variation
+r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: 4.e3, Taimanov variation
+r1bqk2r/pppp1ppp/2n1pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, 4...Nc6
+r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: double Ruy Lopez *
+r1bqk2r/pppp1ppp/2n2n2/1B2p3/1b2P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: double Ruy Lopez
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Spanish, classical defense
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/3PBN2/PPP2PPP/RN1QK2R b KQkq -
+Ruy Lopez: Berlin defense, Kaufmann variation
+r1bqk2r/pppp1ppp/2n2n2/1Bb1p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, Beverwijk variation
+r1bqk2r/pppp1ppp/2n2n2/2b1N3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Boden-Kieseritsky gambit: Lichtenhein defense *
+r1bqk2r/pppp1ppp/2n2n2/2b1N3/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Boden-Kieseritsky gambit *
+r1bqk2r/pppp1ppp/2n2n2/2b1P3/2Bp4/5N2/PPP2PPP/RNBQ1RK1 b kq -
+two knights: Max Lange attack
+r1bqk2r/pppp1ppp/2n2n2/2b1p1N1/2B1P3/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Wilkes Barre (Traxler) variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/1PB1P3/2P2N2/P2P1PPP/RNBQK2R b KQkq -
+Giuoco Piano: Bird's attack
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Piano: four knights variation *
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: four knights variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -
+Giuoco Pianissimo: Italian four knights variation
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -
+Giuoco Pianissimo
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1PP2/2P5/PP1PQ1PP/RNB1K1NR b KQkq -
+Bishop's opening: Lopez gambit
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Italian variation *
+r1bqk2r/pppp1ppp/2n2n2/2b5/2BPP3/5N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano
+r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Rubinstein counter-gambit *
+r1bqk2r/pppp1ppp/2n2n2/3Np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Schlechter variation
+r1bqk2r/pppp1ppp/2n2n2/4N3/1b1PP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Scotch, Krause variation
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Spanish variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2P3/2N3P1/PPPPNP1P/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense, Paulsen variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1b2PP2/2N5/PPPP2PP/R1BQKBNR w KQkq -
+Ruy Lopez: Schliemann defense, Berger variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Spanish, classical defense *
+r1bqk2r/pppp1ppp/2n2n2/4p3/2P5/2b1PN2/PPQP1PPP/R1B1KB1R w KQkq -
+English: four knights, Romanishin variation
+r1bqk2r/pppp1ppp/2n2n2/4p3/4P3/P1P5/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange, Keres variation *
+r1bqk2r/pppp1ppp/2n2n2/4p3/4P3/P1b2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Four knights: Ranken variation *
+r1bqk2r/pppp1ppp/2n2n2/8/1bB1P3/2N2N2/PP3PPP/R1BQK2R w KQkq -
+Scotch: G\"oring gambit, Bardeleben variation
+r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/2N2N2/PP3PPP/R1BQK2R b KQkq -
+Giuoco Piano: Greco's attack
+r1bqk2r/pppp1ppp/2n2n2/8/1bBPP3/5N2/PP3PPP/RNBQ1K1R b kq -
+Giuoco Piano: Cracow variation
+r1bqk2r/pppp1ppp/2n2n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: four knights (Tarrasch) variation *
+r1bqk2r/pppp1ppp/2n2n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Three knights variation *
+r1bqk2r/pppp1ppp/2n4n/2b3NQ/2BpP3/8/PPP2PPP/RNB1K2R b KQkq -
+Scotch gambit: Vitzhum attack
+r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+two knights: Max Lange attack, Krause variation
+r1bqk2r/pppp1ppp/2n5/2b1P3/2Bp2n1/5N2/PPP2PPP/RNBQ1RK1 w kq -
+two knights: Max Lange attack, Steinitz variation
+r1bqk2r/pppp1ppp/2n5/2bBP3/8/2p2NK1/PP4PP/RNBQ3R b kq -
+Giuoco Piano: Ghulam Kassim variation
+r1bqk2r/pppp1ppp/2n5/2bPp3/4n3/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+Ponziani: Fraser defense
+r1bqk2r/pppp1ppp/2n5/3P4/2B1n3/2b2N2/PP3PPP/R1BQ1RK1 b kq -
+Giuoco Piano: M\"oller (Therkatz) attack
+r1bqk2r/pppp1ppp/2n5/3np3/1b2P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Rubinstein counter-gambit, exchange variation *
+r1bqk2r/pppp1ppp/2n5/8/1bBP4/2n2N2/PP3PPP/R1BQ1RK1 w kq -
+Giuoco Piano: Greco variation
+r1bqk2r/pppp1ppp/2n5/8/2BP4/B1b2N2/P4PPP/R2Q1RK1 b kq -
+Giuoco Piano: Aitken variation
+r1bqk2r/pppp1ppp/2n5/8/2BPn3/2b2N2/PP3PPP/R1BQ1RK1 w kq -
+Giuoco Piano
+r1bqk2r/pppp2pp/2n2n2/1Bb1pQ2/4P3/8/PPPP1PPP/RNB1K1NR w KQkq -
+KGD: Norwalde variation, B\"ucker gambit *
+r1bqk2r/pppp2pp/2n2n2/2b1p3/2P2p2/2N1P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+Sicilian: Grand Prix attack, Schofman variation *
+r1bqk2r/pppp2pp/2n2n2/2b1pPP1/8/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: MacDonnell gambit *
+r1bqk2r/pppp2pp/2n5/3Npp2/1b2n3/5N2/PPPPQPPP/R1B1KB1R w KQkq -
+Four knights: Rubinstein counter-gambit, Bogolyubov variation *
+r1bqk2r/ppppbppp/2n2n2/3Np3/4P3/5N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Rubinstein counter-gambit, 5.Be2 *
+r1bqk2r/ppppbppp/2n5/1B2P3/4n3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, Minckwitz variation
+r1bqk2r/ppppbppp/2n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open Berlin defense, 5...Be7
+r1bqk2r/ppppbppp/2n5/4P3/2Bpn3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Hungarian defense: Tartakower variation
+r1bqk2r/ppppbppp/2nn4/4N2Q/8/1BN5/PPPP1PPP/R1B1K2R b KQkq -
+Vienna: Alekhine variation
+r1bqk3/ppp3p1/2n5/2bppP2/4n1P1/2PP4/PP3P2/RNBQK1NB w KQq -
+KGA: Greco gambit *
+r1bqkb1r/1p1n1ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen, classical, Nd7 system
+r1bqkb1r/1p1ppppp/p1n2n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Marini variation *
+r1bqkb1r/1p2nppp/p1n1p3/2pp4/3P4/3BPN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: Simagin variation *
+r1bqkb1r/1p2pp1p/2n3p1/p1np4/4PB2/2P2N2/PPQN1PPP/R3KB1R b KQkq -
+QGD Slav: Carlsbad variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp2B1/8/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: Steiner variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/5B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: Czech defense *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/8/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD Slav: Soultanb\'eieff variation *
+r1bqkb1r/1p2pppp/2n2n2/p1Pp4/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav accepted: Alapin variation *
+r1bqkb1r/1p2pppp/2n5/p1Pp4/4nB2/2P1PN2/PP3PPP/RN1QKB1R b KQkq -
+QGD Slav: Wiesbaden variation *
+r1bqkb1r/1p2pppp/2n5/p1Pp4/4nB2/2P2N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: Krause attack *
+r1bqkb1r/1p3ppp/2n1pn2/p1Pp4/5B2/2P2N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: Dutch variation *
+r1bqkb1r/1p3ppp/2n1pn2/p1Pp4/5B2/N1P2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: Dutch, Lasker variation *
+r1bqkb1r/1p3ppp/2n2n2/p1Ppp1B1/8/N1P2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: Smyslov variation *
+r1bqkb1r/1p3ppp/p1n1pn2/3p4/2P1P3/N1N5/PP3PPP/R1BQKB1R w KQkq -
+Sicilian, Sz\'en variation, Dely-Kasparov gambit
+r1bqkb1r/1p3ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6
+r1bqkb1r/1pp1nppp/p1B5/3pP3/8/4P3/PPP2PPP/RNBQK1NR b KQkq -
+French: Winawer, Alekhine gambit *
+r1bqkb1r/1pp2ppp/2P2n2/1p6/3Pp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Rauzer variation *
+r1bqkb1r/1pp2ppp/p1n5/3pP3/8/2N1P3/PPP2PPP/R1BQK1NR b KQkq -
+French: Winawer, Alekhine gambit, Kan variation *
+r1bqkb1r/1pp2ppp/p1np1n2/4p3/B1P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: Morphy defense, Duras variation
+r1bqkb1r/1pp2ppp/p1np1n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred (Russian defense)
+r1bqkb1r/1ppn1ppp/p3pn2/8/3P4/6P1/PPQ1PPBP/RNB1K1NR b KQkq -
+Catalan: open, Alekhine variation
+r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Ranken variation
+r1bqkb1r/1ppp1ppp/p1B2n2/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez: Treybal (Bayreuth) variation (exchange var. deferred)
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Gunsberg variation *
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: four knights (Tarrasch) variation
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: Anderssen variation
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: 5.O-O
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Morphy defense
+r1bqkb1r/1ppp1ppp/p1n2n2/4p3/B3P3/5N2/PPPPQPPP/RNB1K2R b KQkq -
+Ruy Lopez: Wormald (Alapin) attack
+r1bqkb1r/1ppp1ppp/p1n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, Rosenthal variation
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 6.d4
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Knorre variation
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open (Tarrasch) defense
+r1bqkb1r/1ppp1ppp/p1n5/4p3/B3n3/5N2/PPPPQPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Tartakower variation
+r1bqkb1r/1ppp1ppp/p1n5/8/B2pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Riga variation
+r1bqkb1r/1pppnppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cozio defense deferred
+r1bqkb1r/2p1nppp/p7/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Zukertort variation
+r1bqkb1r/2p2ppp/p1n5/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 8.de
+r1bqkb1r/2p2ppp/p1n5/1p1pp3/2PPn3/1B3N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Harksen gambit
+r1bqkb1r/2p2ppp/p1np1n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: ...b5 & ...d6
+r1bqkb1r/2p2ppp/p1p2n2/3p4/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, positional main line *
+r1bqkb1r/2p2ppp/p1pp4/4p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred, Rubinstein variation
+r1bqkb1r/2p2ppp/p7/1p1p4/P2pn3/1BN5/1PP2PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Berger variation
+r1bqkb1r/2p2ppp/p7/1p1pp3/P2nn3/1B3N2/1PP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Schlechter defense
+r1bqkb1r/2p3pp/p1p5/3pPp2/4n3/2N2N2/PPP2PPP/R1BQR1K1 b kq -
+Ruy Lopez: Steinitz defense deferred, Boleslavsky variation
+r1bqkb1r/2pp1ppp/p1n5/1p1Pp3/B3n3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Richter variation
+r1bqkb1r/2pp1ppp/p1n5/1p2N3/B2Pn3/8/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, Friess attack
+r1bqkb1r/2pp1ppp/p1n5/1p2p3/3Pn3/1B3N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 7.Bb3
+r1bqkb1r/2pp1ppp/p1n5/1p2p3/B2Pn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, 6.d4 b5
+r1bqkb1r/3n1ppp/p1p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, 8...a6
+r1bqkb1r/3n1ppp/p1p1pn2/8/1p1PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Pir\'c variation
+r1bqkb1r/3n1ppp/p3p3/1N2P3/3p2n1/3B1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Rabinovich variation
+r1bqkb1r/3n1ppp/p3pn2/1N2P3/3p4/3B1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, Blumenfeld variation
+r1bqkb1r/3n1ppp/p3pn2/1pp1P3/3P4/2NB1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, old main line
+r1bqkb1r/3n1ppp/p3pn2/1pp5/3PP3/2NB1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran
+r1bqkb1r/3n1ppp/p3pn2/1ppP4/4P3/2NB1N2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: Meran, Reynolds' variation
+r1bqkb1r/5p1p/p1np4/1p1Npp2/4P3/N7/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Sveshnikov variation
+r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B1Q2/PP3PPP/R1B1K2R b KQkq -
+QGD semi-Slav: Meran, Stahlberg variation
+r1bqkb1r/5ppp/4pn2/1p2N3/3p4/3B4/PP3PPP/R1BQ1RK1 b kq -
+QGD semi-Slav: Meran, Sozin variation
+r1bqkb1r/5ppp/p1np1n2/1p2p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Pelikan, Chelyabinsk variation
+r1bqkb1r/5ppp/p3pn2/1N2n3/3p4/3B1N2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Sozin variation
+r1bqkb1r/p1p2ppp/2n2n2/1p1Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Ulvestad variation
+r1bqkb1r/p1p2ppp/8/1p1np3/3nN3/2P5/PP1P1PPP/RNBQKB1R b KQkq -
+two knights defense: Fritz, Gruber variation
+r1bqkb1r/p1pn1ppp/1p2pn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Queen's pawn game, Zukertort variation *
+r1bqkb1r/p1pp1ppp/2p2n2/4P3/8/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch: Mieses variation
+r1bqkb1r/p1pp1ppp/2p2n2/8/4P3/8/PPPN1PPP/R1BQKB1R b KQkq -
+Scotch: Tartakower variation
+r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N2Q2/PP3PPP/R3KB1R b KQkq -
+QGD semi-Slav: anti-Meran, Szab\'o variation
+r1bqkb1r/p2n1p2/2p1pn2/1p2P1B1/2pP4/2N3P1/PP3P1P/R2QKB1R b KQkq -
+QGD semi-Slav: anti-Meran, Lilienthal variation
+r1bqkb1r/p2n1ppp/2p1pn2/1p6/2BP4/2N1PN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran variation
+r1bqkb1r/p2n1ppp/2p1pn2/8/1p1P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: neo-Meran (Lundin variation)
+r1bqkb1r/p3pp1p/2pp1np1/4P3/2B5/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Magnus Smith trap
+r1bqkb1r/p4pp1/2p2n1p/n3p1N1/8/8/PPPPBPPP/RNBQK2R w KQkq -
+Two knights defense
+r1bqkb1r/p4pp1/2p2n1p/n3p3/8/7N/PPPPBPPP/RNBQK2R b KQkq -
+two knights defense: Steinitz variation
+r1bqkb1r/p4ppp/2n1pn2/1ppp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Makogonov variation *
+r1bqkb1r/p4ppp/2p2n2/3pp3/8/6P1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: modern exchange variation *
+r1bqkb1r/p4ppp/2p2n2/n3p1N1/8/8/PPPPBPPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/p4ppp/2p2n2/nB2p1N1/8/5Q2/PPPP1PPP/RNB1K2R b KQkq -
+two knights defense: Bogolyubov variation
+r1bqkb1r/p4ppp/5n2/np2p1N1/8/5Q2/PPPP1PPP/RNB1K2R w KQkq -
+two knights defense: Blackburne variation
+r1bqkb1r/pp1n1ppp/2n1p3/2PpP3/5P2/2N5/PPP3PP/R1BQKBNR w KQkq -
+French: Steinitz variation
+r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P1P2/2N1BN2/PPP3PP/R2QKB1R b KQkq -
+French: Steinitz, Boleslavsky variation
+r1bqkb1r/pp1n1ppp/2n1p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -
+French: Tarrasch, closed variation
+r1bqkb1r/pp1n1ppp/2n1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R b KQkq -
+French: Tarrasch, closed variation, main line
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: 5...c6
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQkq -
+QGD
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/4PN2/PP1N1PPP/R2QKB1R b KQkq -
+QGD: Capablanca variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PP4/P1N1P3/1P3PPP/R2QKBNR b KQkq -
+QGD: Capablanca anti-Cambridge Springs variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p2B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD: Alekhine variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: 5...Nd7
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2N1PN2/PPQ2PPP/R1B1KB1R b KQkq -
+QGD semi-Slav: Stoltz variation
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: 6.Bd3
+r1bqkb1r/pp1n1ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD Slav
+r1bqkb1r/pp1n1ppp/2p1pn2/3pN3/2PP4/2N1P3/PP3PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: Rubinstein (anti-Meran) system
+r1bqkb1r/pp1n1ppp/2p1pn2/8/2BP4/2N1PN2/PP3PPP/R1BQK2R b KQkq -
+QGD semi-Slav: 7.Bc4
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/2PP4/3BPN2/PP1N1PPP/R1BQK2R w KQkq -
+QGD Slav: Semmering variation
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav *
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD Slav *
+r1bqkb1r/pp1n1ppp/4pn2/2pp4/3P4/2P1PNP1/PP3P1P/RNBQKB1R b KQkq -
+QGD: Spielmann variation *
+r1bqkb1r/pp1npp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R w KQkq -
+Sicilian: dragon, Levenfish; Flohr variation
+r1bqkb1r/pp1npppp/2n5/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: Nimzovich (knight's tour) variation *
+r1bqkb1r/pp1npppp/2n5/8/2Pp4/B2P1NP1/4PP1P/RN1QKB1R w KQkq -
+Benk\"o gambit: Nd2 variation *
+r1bqkb1r/pp1npppp/5n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Bogo-Indian defense, Gr\"unfeld variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+QGD: Albin counter-gambit, Janowski variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N5/PPP1QPPP/R1B1KBNR b KQkq -
+QGD: Albin counter-gambit, Balogh variation *
+r1bqkb1r/pp1npppp/5n2/2pP4/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+QGD: Albin counter-gambit, Alapin variation *
+r1bqkb1r/pp1npppp/5n2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: Breyer variation *
+r1bqkb1r/pp1p1Npp/2p1nn2/8/2B1P3/8/PPP2PPP/RNBQ1RK1 b kq -
+Scotch: Cochrane variation
+r1bqkb1r/pp1p1ppp/2n1pn2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, 4.e3 *
+r1bqkb1r/pp1p1ppp/2n1pn2/8/2PN4/2N5/PP2PPPP/R1BQKB1R w KQkq -
+English: symmetrical variation
+r1bqkb1r/pp1p1ppp/2n2n2/2p1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Nimzovich variation *
+r1bqkb1r/pp1p1ppp/2n2n2/4p3/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Pelikan (Lasker/Sveshnikov) variation
+r1bqkb1r/pp1p1ppp/2n5/2ppP3/3P4/5N2/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Nimzovich-Rubinstein; Rubinstein counter-gambit
+r1bqkb1r/pp1p1ppp/n1p2n2/8/2PNp3/2N5/PP1PPPPP/R1BQKB1R w KQkq -
+Sicilian: 2.c3, Heidenfeld variation *
+r1bqkb1r/pp1pnppp/2p2n2/1B2N3/4P3/3P4/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense, Mortimer trap
+r1bqkb1r/pp1ppp1p/2n2np1/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, kingside fianchetto *
+r1bqkb1r/pp1ppppp/2n2n2/1Bp5/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+English: Nimzo-English opening *
+r1bqkb1r/pp1ppppp/2n2n2/2p3B1/4P3/3P4/PPP2PPP/RN1QKBNR b KQkq -
+English, Smyslov defense *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: symmetrical, four knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: symmetrical, four knights system
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+English: four knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+English: three knights system *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -
+English opening *
+r1bqkb1r/pp1ppppp/2n2n2/2p5/8/1P2PN2/P1PP1PPP/RNBQKB1R b KQkq -
+English: Queens Indian formation *
+r1bqkb1r/pp1ppppp/2n2n2/8/2PN4/8/PP2PPPP/RNBQKB1R b KQkq -
+English: symmetrical, three knights system *
+r1bqkb1r/pp1ppppp/2n2n2/8/3N4/8/PPP1PPPP/RNBQKB1R w KQkq -
+English: Anglo-Gr\"unfeld defense *
+r1bqkb1r/pp1ppppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkb1r/pp1ppppp/2n5/2p1P3/1P4n1/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+English: Bellon gambit *
+r1bqkb1r/pp1ppppp/2n5/2pnP3/8/N1P2N2/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: 2.c3, Heidenfeld variation
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein, anti-H\"ubner system) *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/1P2PN2/P1PP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Fischer variation, 5.Ne2 *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: Reshevsky variation *
+r1bqkb1r/pp2nppp/2n1p3/1Bpp4/8/BP2PN2/P1PP1PPP/RN1QK2R b KQkq -
+Nimzo-Indian: 4.e3, Bronstein (Byrne) variation *
+r1bqkb1r/pp2nppp/2n5/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Kramer system *
+r1bqkb1r/pp2pp1p/2n2np1/2Pp4/3P4/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: Tarrasch, Folkestone (Swedish) variation *
+r1bqkb1r/pp2pp1p/2n2np1/2pp4/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n2np1/3p4/2PP4/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD: Tarrasch, Prague variation *
+r1bqkb1r/pp2pp1p/2n2np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system *
+r1bqkb1r/pp2pp1p/2n2np1/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n2np1/8/2Pp4/B2P1NP1/4PP1P/RN1QKB1R w KQkq -
+Benk\"o gambit: fianchetto variation *
+r1bqkb1r/pp2pp1p/2n3p1/2pn4/8/1QN1PN2/PP1P1PPP/R1B1KB1R b KQkq -
+English: symmetrical, Geller variation *
+r1bqkb1r/pp2pp1p/2np1np1/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Bondarevsky variation
+r1bqkb1r/pp2pp1p/3p1np1/8/2PQP3/2N5/PP3PPP/R1B1KB1R w KQkq -
+Sicilian: accelerated fianchetto, Gurgenidze variation
+r1bqkb1r/pp2pppp/2n2n2/1Bp1N3/2Pp4/4P3/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: three knights, Euwe variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bp5/2Pp4/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: three knights, Korchnoi variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Ragozin variation *
+r1bqkb1r/pp2pppp/2n2n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+QGD: Chigorin defense, Janowski variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: semi-Slav, Noteboom variation *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/2P2N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav accepted *
+r1bqkb1r/pp2pppp/2n2n2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA, 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD: Semi-Tarrasch defense *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/1QP2N2/PP2PPPP/RNB1KB1R b KQkq -
+QGD Slav: S\"uchting variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/2P2NP1/PP2PP1P/RNBQKB1R b KQkq -
+QGD Slav\Gr\"unfeld: Schlechter variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: 4.Nf3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq -
+Gr\"unfeld: Three knights variation *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/4P3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Old Indian: Ukrainian variation, 4.Nf3 *
+r1bqkb1r/pp2pppp/2n2n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.Nc3 *
+r1bqkb1r/pp2pppp/2n2n2/2ppP3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+English: Bradley Beach variation *
+r1bqkb1r/pp2pppp/2n2n2/3p4/2PP4/8/PP3PPP/RNBQKBNR w KQkq -
+QGD: Tarrasch defense *
+r1bqkb1r/pp2pppp/2n2n2/3p4/2Pp4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, 5.cd *
+r1bqkb1r/pp2pppp/2n2n2/3p4/3P1B2/2PB4/PP3PPP/RN1QK1NR b KQkq -
+Caro-Kann: exchange, Rubinstein variation
+r1bqkb1r/pp2pppp/2n2n2/8/2Pp4/3P1NP1/PP3P1P/RNBQKB1R b KQkq -
+Benoni defense *
+r1bqkb1r/pp2pppp/2n5/2pn4/8/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq -
+English: symmetrical variation *
+r1bqkb1r/pp2pppp/2np1n2/2p5/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+English: four knights, Capablanca variation *
+r1bqkb1r/pp2pppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer
+r1bqkb1r/pp2pppp/2np1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Sozin, not Scheveningen
+r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: classical
+r1bqkb1r/pp2pppp/2np1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian
+r1bqkb1r/pp2pppp/5n2/n2P2B1/2p5/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, Herzog defense
+r1bqkb1r/pp3p1p/2n2np1/2Ppp3/3P4/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation *
+r1bqkb1r/pp3ppp/1nn1p3/3pP3/3P4/3B4/PP1NNPPP/R1BQK2R w KQkq -
+French: Tarrasch, Leningrad variation
+r1bqkb1r/pp3ppp/2Np1n2/4p3/4P3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Boleslavsky, Louma variation
+r1bqkb1r/pp3ppp/2Nppn2/6B1/4P3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Richter attack
+r1bqkb1r/pp3ppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQK2R b KQkq -
+QGD: Semi-Tarrasch, 7.Bd3
+r1bqkb1r/pp3ppp/2n1p3/2pp4/3Pn3/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: Rubinstein (anti-Meran) system *
+r1bqkb1r/pp3ppp/2n1p3/3p4/3PnB2/4P3/PP1N1PPP/RN1QKB1R b KQkq -
+QGD Slav: Amsterdam variation *
+r1bqkb1r/pp3ppp/2n1pn2/1Bpp4/3P4/4PN2/PPP2PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5 *
+r1bqkb1r/pp3ppp/2n1pn2/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5 *
+r1bqkb1r/pp3ppp/2n1pn2/2Pp4/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 5.e3 (Alekhine variation) *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: 5...Nd7 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD semi-Slav: 5.e3 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.e3 *
+r1bqkb1r/pp3ppp/2n1pn2/2pp4/3P4/P1P1PN2/1P3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav: accelerated Meran (Alekhine variation) *
+r1bqkb1r/pp3ppp/2n1pn2/3p2B1/2PP4/2N5/PP3PPP/R2QKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik, normal variation
+r1bqkb1r/pp3ppp/2n1pn2/3p4/2PN4/4P3/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch with e3 *
+r1bqkb1r/pp3ppp/2n1pn2/3p4/3P1B2/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD Slav: exchange variation *
+r1bqkb1r/pp3ppp/2n2n2/1B2p3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch: G\"oring gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Pp4/1P2p3/2P2N2/P3PPPP/RNBQKB1R w KQkq -
+QGD Slav: Tolush-Geller gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Ppp3/8/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: Slav gambit *
+r1bqkb1r/pp3ppp/2n2n2/2Ppp3/8/P4N2/1PP1PPPP/RNBQKB1R w KQkq -
+QGA, Bogolyubov variation *
+r1bqkb1r/pp3ppp/2n2n2/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -
+QGD: Tarrasch, Prague variation
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/4P3/3P1N2/PPPN1PPP/R1BQKB1R w KQkq -
+Old Indian: main line *
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: 5.Nf3 *
+r1bqkb1r/pp3ppp/2n2n2/2ppp3/Q1P5/3P2P1/PP2PPBP/RNB1K1NR b KQkq -
+Pterodactyl defense *
+r1bqkb1r/pp3ppp/2n2n2/4p3/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: classical with e4 and Nf3 *
+r1bqkb1r/pp3ppp/2np1n2/4p3/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: Boleslavsky variation
+r1bqkb1r/pp3ppp/2np1n2/4p3/4P3/1NN5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Boleslavsky variation, 7.Nb3
+r1bqkb1r/pp3ppp/2nppn2/1B4B1/3NP3/2N5/PPP2PPP/R2QK2R b KQkq -
+Sicilian: Richter-Rauzer, Margate (Alekhine) variation
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, 6...e6
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack
+r1bqkb1r/pp3ppp/2nppn2/6B1/3NP3/2NQ4/PPP2PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Keres variation
+r1bqkb1r/pp3ppp/2nppn2/6B1/4P3/1NN5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Pod\v ebrady variation
+r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N1B3/PPP2PPP/R2QK2R b KQkq -
+Sicilian: Sozin, 7.Be3
+r1bqkb1r/pp3ppp/2nppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin, Leonhardt variation
+r1bqkb1r/pp3ppp/2nppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: modern Scheveningen
+r1bqkb1r/pp3ppp/n1n5/2p1p3/3P4/P1N1PN2/1P3PPP/R1BQKB1R b KQkq -
+Sicilian, Sz\'en variation, Dely-Kasparov gambit *
+r1bqkb1r/pp4pp/2n2n2/2p1pp2/2Pp4/3P1NP1/PP2PPBP/RNBQ1RK1 w kq -
+King's Indian: Four pawns attack, dynamic line *
+r1bqkb1r/pp4pp/2n2n2/4pp2/2Pp4/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+Benoni: four pawns attack *
+r1bqkb1r/ppp1nppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, Alekhine (Mar\'oczy) gambit *
+r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/4B3/PP4PP/RN1QKBNR b KQkq -
+Alekhine's defense: four pawns attack, 7.Be3
+r1bqkb1r/ppp1pppp/1nn5/4P3/2PP4/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, 6...Nc6
+r1bqkb1r/ppp2Npp/2n5/3np3/2B5/8/PPPP1PPP/RNBQK2R b KQkq -
+two knights defense: Fegatello attack
+r1bqkb1r/ppp2p1p/2n3p1/3np3/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, fianchetto variation *
+r1bqkb1r/ppp2p1p/2n3p1/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Zagreb (fianchetto) variation *
+r1bqkb1r/ppp2p1p/2n5/3np1p1/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, Keres attack *
+r1bqkb1r/ppp2p1p/2n5/3p2p1/Q3nB2/2P2N2/PP2PPPP/RN2KB1R w KQkq -
+Scandinavian defense, Gr\"unfeld variation *
+r1bqkb1r/ppp2pp1/2n2n1p/3p2B1/Q7/5N2/PPP1PPPP/RN2KB1R w KQkq -
+Scandinavian defense, Lasker variation *
+r1bqkb1r/ppp2pp1/2n2n1p/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+Pirc: classical, h3 system *
+r1bqkb1r/ppp2pp1/2n4p/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Adams attack *
+r1bqkb1r/ppp2pp1/5nn1/3p3p/8/2P3BP/PP1NPPP1/R2QKBNR b KQkq -
+Caro-Kann: classical, 7...Nd7 *
+r1bqkb1r/ppp2pp1/5nn1/3p4/7p/2P3BP/PP1NPPP1/R2QKBNR w KQkq -
+Caro-Kann: classical, Spassky variation *
+r1bqkb1r/ppp2ppp/2Bp1n2/4p3/4P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: Berlin defense, Anderssen variation
+r1bqkb1r/ppp2ppp/2n1pn2/3p4/3PP3/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, Guimard main line
+r1bqkb1r/ppp2ppp/2n1pn2/3p4/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -
+French: Reversed Philidor formation
+r1bqkb1r/ppp2ppp/2n2n2/3Pp3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Scotch, 4...exd4 *
+r1bqkb1r/ppp2ppp/2n2n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: exchange, Bogolyubov variation
+r1bqkb1r/ppp2ppp/2n2n2/3p2B1/Q3P3/8/PPP2PPP/RN2KBNR b KQkq -
+Scandinavian: Anderssen counter-attack, Collijn variation *
+r1bqkb1r/ppp2ppp/2n2n2/3p4/Q3P3/8/PPP2PPP/RNB1KBNR w KQkq -
+Scandinavian: Anderssen counter-attack, Goteborg system *
+r1bqkb1r/ppp2ppp/2n2n2/3p4/Q4B2/5N2/PPP1PPPP/RN2KB1R b KQkq -
+Scandinavian defense *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Scotch variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPN1PPP/R1BQKB1R b KQkq -
+Philidor: Improved Hanham variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4P3/3P1N2/PPPNBPPP/R1BQK2R b KQkq -
+Inverted Hanham
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/4PP2/3P4/PPP3PP/RNBQKBNR w KQkq -
+Philidor: Philidor counter-gambit, Zukertort variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/2PP2P1/PP2PPBP/RNBQK1NR b KQkq -
+Robatsch defense: two knights, Suttles variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: classical (two knights) system *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P1NP1/PPP1PPBP/RNBQK2R b KQkq -
+Pirc: classical (two knights) system *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: two knights variation *
+r1bqkb1r/ppp2ppp/2n2n2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Leonhardt variation
+r1bqkb1r/ppp2ppp/2n5/1B1n4/4p3/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Sicilian: Pin, Koch variation *
+r1bqkb1r/ppp2ppp/2n5/1B1np3/8/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Pin variation (Sicilian counter-attack) *
+r1bqkb1r/ppp2ppp/2n5/1B1pp3/4n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Scotch, Krause variation *
+r1bqkb1r/ppp2ppp/2n5/1B2p3/8/2NnPN2/PP1P1PPP/R1BQK2R w KQkq -
+Sicilian: Taimanov, American attack *
+r1bqkb1r/ppp2ppp/2n5/3np1N1/2BP4/8/PPP2PPP/RNBQK2R b KQkq -
+two knights defense: Lolli attack
+r1bqkb1r/ppp2ppp/2n5/3np2Q/8/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Steinitz variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/4P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: Pelikan (Lasker/Sveshnikov) variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N1P3/PP1P1PPP/R1BQKBNR w KQkq -
+Sicilian: Taimanov variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N1P3/PPQP1PPP/R1B1KBNR b KQkq -
+Sicilian: Taimanov (Bastrikov) variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, modern variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/2NP1N2/PP2PPPP/R1BQKB1R b KQkq -
+Sicilian *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1N2/PP2PPPP/RNBQKB1R w KQkq -
+Sicilian *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3P1NP1/PP2PP1P/RNBQKB1R b KQkq -
+Sicilian: dragon variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/3PPN2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Scheveningen variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P1N1P3/1P1P1PPP/R1BQKBNR b KQkq -
+Sicilian: Taimanov variation *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf *
+r1bqkb1r/ppp2ppp/2n5/3np3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, 5.Nc3 *
+r1bqkb1r/ppp2ppp/2n5/3p4/2Bpn3/2N2N2/PPP2PPP/R1BQR1K1 b kq -
+two knights defense: Canal variation
+r1bqkb1r/ppp2ppp/2n5/4P3/2BP2n1/4p3/PPP3PP/RNBQK1NR w KQkq -
+Philidor: Philidor counter-gambit, Berger variation *
+r1bqkb1r/ppp2ppp/2np1n2/1B2p3/2P1P3/3P1N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: Berlin defense, Duras variation
+r1bqkb1r/ppp2ppp/2np1n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, 4.O-O, d6
+r1bqkb1r/ppp2ppp/2np1n2/4p3/2P5/1PN1P3/P2P1PPP/R1BQKBNR w KQkq -
+Amsterdam attack
+r1bqkb1r/ppp2ppp/4pn2/4N3/3P4/8/PPP2PPP/R1BQKB1R b KQkq -
+French: Rubinstein, Capablanca line
+r1bqkb1r/ppp2ppp/5n2/3Pp1N1/2Bn4/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense: Fritz variation
+r1bqkb1r/ppp2ppp/5n2/3Pp3/3n4/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Belgrade gambit *
+r1bqkb1r/ppp2ppp/5n2/3Pp3/3n4/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -
+Three knights: Steinitz, Rosenthal variation *
+r1bqkb1r/ppp2ppp/5n2/3p4/2PPp3/2N5/PP1P1PPP/R1BQKB1R b KQkq -
+Sicilian: Nimzovich-Rubinstein; Rubinstein counter-gambit *
+r1bqkb1r/ppp2ppp/5n2/3pn3/8/2B1P3/PPP2PPP/RN1QKBNR b KQkq -
+French: Fort Knox variation *
+r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/3P4/PPP2PPP/RNBQK2R b KQkq -
+two knights defense: Kieseritsky variation
+r1bqkb1r/ppp2ppp/5n2/n2Pp1N1/2B5/8/PPPP1PPP/RNBQK2R w KQkq -
+two knights defense
+r1bqkb1r/ppp2ppp/5n2/nB1Pp1N1/8/8/PPPP1PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/ppp2ppp/6nn/3p4/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, Flohr variation *
+r1bqkb1r/ppp2ppp/8/3p4/4n3/4PN2/PPP2PPP/R1BQKB1R w KQkq -
+French: Rubinstein, Capablanca line *
+r1bqkb1r/ppp3pp/2n2n2/3p1p2/2PPp3/4P3/PP1N1PPP/RNBQKB1R w KQkq -
+French: Steinitz variation *
+r1bqkb1r/ppp3pp/2n2n2/3p1p2/4p3/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.e5 *
+r1bqkb1r/ppp3pp/2n2n2/3p4/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Blackmar-Diemer: Euwe defense *
+r1bqkb1r/ppp3pp/2n2n2/3ppP2/6P1/2N5/PPPP1P1P/R1BQKBNR w KQkq -
+Vienna: Pierce gambit *
+r1bqkb1r/ppp3pp/2n2n2/3ppp2/2P5/3P1NP1/PP2PPBP/RNBQK2R b KQkq -
+Pirc: Austrian attack, dragon formation *
+r1bqkb1r/ppp3pp/2n2n2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq -
+Pirc: Austrian attack *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3P1NP1/PP1NPP1P/R1BQKB1R b KQkq -
+Sicilian: dragon, Levenfish; Flohr variation *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3P1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Sicilian: dragon, Levenfish variation *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/3PPN2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, 6.f4 *
+r1bqkb1r/ppp3pp/2n5/3npp2/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 6.f4 *
+r1bqkb1r/ppp4p/3p1nN1/8/3np2Q/8/PPP2PPP/RNB1KB1R w KQkq -
+Vienna gambit, Wurzburger trap *
+r1bqkb1r/pppn1ppp/2np4/1B2p3/3PP3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: closed Berlin defense, Chigorin variation
+r1bqkb1r/pppn1ppp/3p1n2/4p3/2PP4/2NBP3/PP3PPP/R1BQK1NR b KQkq -
+Old Indian: Dus-Khotimirsky variation
+r1bqkb1r/pppn1ppp/3p1n2/4p3/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+Old Indian: main line
+r1bqkb1r/pppn1ppp/3p1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Philidor: Improved Hanham variation
+r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR b KQkq -
+QGD
+r1bqkb1r/pppn1ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: 4.Bg5 Nbd7
+r1bqkb1r/pppn1ppp/4pn2/8/2QP4/6P1/PP2PPBP/RNB1K1NR b KQkq -
+Catalan: open, 5.Qa4 Nbd7, 6.Qxc4
+r1bqkb1r/pppn1ppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq -
+French: Tarrasch, open variation, main line *
+r1bqkb1r/pppn1ppp/5n2/3p4/3P1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: exchange, S\"amisch variation
+r1bqkb1r/pppn1ppp/5n2/3pp3/3P4/2N1PN2/PPP2PPP/R1BQKB1R b KQkq -
+French: Tarrasch, Guimard main line *
+r1bqkb1r/pppn1ppp/5n2/4N3/4p3/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Sokolsky variation *
+r1bqkb1r/pppn1ppp/8/4p3/8/2P2N2/P1PP1PPP/R1BQKB1R w KQkq -
+Scotch: Tartakower variation *
+r1bqkb1r/pppp1ppp/2n1pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -
+English: Mikenas-Carls, Kevitz variation
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Spanish variation
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, 4.O-O
+r1bqkb1r/pppp1ppp/2n2n2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense
+r1bqkb1r/pppp1ppp/2n2n2/1B6/3pP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Berlin defense, Nyholm attack
+r1bqkb1r/pppp1ppp/2n2n2/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Belgrade gambit
+r1bqkb1r/pppp1ppp/2n2n2/4N3/4P3/2N5/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights: Schultze-M\"uller gambit
+r1bqkb1r/pppp1ppp/2n2n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Nimzovich attack *
+r1bqkb1r/pppp1ppp/2n2n2/4p1B1/3P4/2P5/PP2PPPP/RN1QKBNR b KQkq -
+Caro-Kann: two knights, 3...Bg4 *
+r1bqkb1r/pppp1ppp/2n2n2/4p1N1/2B1P3/8/PPPP1PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Italian variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Vienna game
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/3P1N2/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense (Modern bishop's opening)
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P1P3/2N2N2/PP1P1PPP/R1BQKB1R b KQkq -
+English: four knights, Nimzovich variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N1PN2/PP1P1PPP/R1BQKB1R b KQkq -
+English: four knights, 4.e3
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: four knights system
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2N2NP1/PP1PPP1P/R1BQKB1R b KQkq -
+English: four knights, kingside fianchetto
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/2NP1N2/PP2PPPP/R1BQKB1R b KQkq -
+English: four knights, Capablanca variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/2P5/P1N2N2/1P1PPPPP/R1BQKB1R b KQkq -
+English: four knights, Marini variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: two knights variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Two knights variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Four knights: Scotch variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/3PP3/5N2/PPP1BPPP/RNBQK2R b KQkq -
+Tayler opening
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Four knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights game
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Three knights: Steinitz variation *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Three knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: Jaenisch counter-attack
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov three knights game *
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq -
+Four knights: Gunsberg variation
+r1bqkb1r/pppp1ppp/2n2n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Three knights: Winawer defense (Gothic defense) *
+r1bqkb1r/pppp1ppp/2n2n2/6N1/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Two knights defense, Perreux variation
+r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2n2n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Scotch gambit: Dubois-R\'eti defense
+r1bqkb1r/pppp1ppp/2n2n2/8/2PPp3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+English: Bradley Beach variation
+r1bqkb1r/pppp1ppp/2n2n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Schmidt variation
+r1bqkb1r/pppp1ppp/2n2n2/8/3pP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Four knights: Scotch, 4...exd4
+r1bqkb1r/pppp1ppp/2n2n2/8/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -
+Center game: Berger variation
+r1bqkb1r/pppp1ppp/2n5/1B2p3/4n3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Berlin defense, open variation
+r1bqkb1r/pppp1ppp/2n5/2n1P3/3N4/8/PPP1QPPP/RNB1KB1R w KQkq -
+Petrov: modern attack, Bardeleben variation
+r1bqkb1r/pppp1ppp/2n5/4p3/4n3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Four knights: Schultze-M\"uller gambit *
+r1bqkb1r/pppp1ppp/2n5/8/2Bpn3/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Two knights defense
+r1bqkb1r/pppp1ppp/2nn4/1B2P3/8/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open Berlin defense, l'Hermet variation
+r1bqkb1r/pppp1ppp/2nn4/4p2Q/3P4/1BN5/PPP2PPP/R1B1K1NR b KQkq -
+Vienna: Adams' gambit
+r1bqkb1r/pppp1ppp/2nn4/4p3/B2P4/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open Berlin defense, Showalter variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3NP3/2N5/PPPP1PPP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, exchange variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQ1RK1 b kq -
+Four knights: Rubinstein counter-gambit, Henneberger variation
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Three knights: Schlechter variation *
+r1bqkb1r/pppp1ppp/5n2/1B2p3/3nP3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Four knights: Rubinstein counter-gambit
+r1bqkb1r/pppp1ppp/5n2/4p3/3nP3/2N2N2/PPPPBPPP/R1BQK2R b KQkq -
+Four knights: Rubinstein counter-gambit, 5.Be2
+r1bqkb1r/pppp2p1/2n5/4pPPp/6n1/2N5/PPPP1P1P/R1BQKBNR w KQkq -
+Vienna: Hamppe-Allgaier gambit *
+r1bqkb1r/pppp2p1/2n5/4pPPp/6n1/2NP4/PPP2P1P/R1BQKBNR b KQkq -
+Vienna: Hamppe-Allgaier gambit, Alapin variation *
+r1bqkb1r/pppp2p1/2n5/4pPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Blackburne gambit *
+r1bqkb1r/pppp2pp/2n2n2/4N3/3Pp3/8/PPP1BPPP/RNBQK2R b KQkq -
+Vienna gambit: Breyer variation *
+r1bqkb1r/pppp2pp/2n2n2/4pP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Quaade gambit *
+r1bqkb1r/pppp2pp/2n2n2/4pP2/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna gambit *
+r1bqkb1r/pppp2pp/2n2n2/4pp2/2B1P3/3P4/PPPN1PPP/R1BQK1NR b KQkq -
+KGD: classical, Hanham variation *
+r1bqkb1r/ppppnp1p/2n3p1/1B2p3/4P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Ruy Lopez: Cozio defense, Paulsen variation
+r1bqkb1r/ppppnppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Cozio defense
+r1bqkb1r/ppppnppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: chameleon variation *
+r1bqkb1r/ppppnppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani: R\'eti variation
+r1bqkb1r/ppppnppp/5n2/1B2p3/4P3/3P1N2/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: Berlin defense, Mortimer variation
+r1bqkb1r/ppppnppp/8/1B6/3pP3/8/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Bird's defense, Paulsen variation
+r1bqkb1r/pppppppp/2n2n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Kevitz-Trajkovich defense
+r1bqkbnr/1p1p1ppp/p1n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Taimanov variation
+r1bqkbnr/1pp2ppp/p1n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, 5.a3 *
+r1bqkbnr/1pp2ppp/p1np4/4p3/B1P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Duras (Keres) variation
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Three knights variation
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: modern Steinitz defense, 5.O-O
+r1bqkbnr/1pp2ppp/p1np4/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense
+r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: exchange, Keres variation
+r1bqkbnr/1pp2ppp/p1p5/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: exchange variation, 5.O-O
+r1bqkbnr/1pp3pp/p1np4/4pp2/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, siesta variation
+r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/2NP1N2/PPP2PPP/R1BQK2R b KQkq -
+Ruy Lopez: exchange, Romanovsky variation
+r1bqkbnr/1pp3pp/p1p2p2/4p3/4P3/5N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: exchange, Gligori\'c variation
+r1bqkbnr/1ppp1p1p/p1n3p1/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: fianchetto defense deferred
+r1bqkbnr/1ppp1ppp/p1B5/4p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez: exchange variation
+r1bqkbnr/1ppp1ppp/p1n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna: Mengarini variation *
+r1bqkbnr/1ppp1ppp/p1n5/4p3/B3P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez
+r1bqkbnr/1ppp1ppp/p7/4p3/B2nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Bird's defense deferred
+r1bqkbnr/1ppp2pp/p1n5/4pp2/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Schliemann defense deferred
+r1bqkbnr/1ppppppp/p1n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Battambang opening *
+r1bqkbnr/2p2ppp/2p5/p2p4/2PPp3/4P3/PP2NPPP/RNBQK2R w KQkq -
+French: Winawer, advance, Smyslov variation *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PP2NPPP/RNBQK2R b KQkq -
+French: Winawer, advance, 6...Ne7 *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/2p2ppp/p1p5/3p4/2PPp3/4P3/PPQ2PPP/RNB1K1NR b KQkq -
+French: Winawer, classical variation *
+r1bqkbnr/2p2ppp/p1pp4/4p3/3PP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Ruy Lopez: modern Steinitz defense, Richter variation
+r1bqkbnr/2p2ppp/p1pp4/4p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, exchange variation
+r1bqkbnr/2p3pp/p1pp1p2/4p3/3PP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, Alapin variation
+r1bqkbnr/2pp1ppp/p1n5/1p2p3/B3P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Caro variation
+r1bqkbnr/2pp1ppp/p7/np2p3/4P3/1B3N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Taimanov (chase/wing/accelerated counterthrust) variation
+r1bqkbnr/4p1pp/p1p2p2/3p4/2Pp4/4PN2/PP3PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/4p1pp/p1p2p2/8/2pN1P2/4P3/PP4PP/RNBQK2R b KQkq -
+Nimzo-Indian: S\"amisch, Romanovsky variation *
+r1bqkbnr/4p1pp/p1p2p2/8/2pN4/4P3/PP3PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch, Keres variation *
+r1bqkbnr/4pppp/p1p5/2pp4/8/4PN2/PPPP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/4pppp/p1p5/2pp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/2P5/1P2PN2/P2P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: S\"amisch, O'Kelly variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/2P5/4PN2/PP1P1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p1p1p3/2pp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+Nimzo-Indian: S\"amisch variation *
+r1bqkbnr/5ppp/p2p4/1pp5/3QP3/1B6/PPP2PPP/RNB1K2R w KQkq -
+Ruy Lopez: Noah's ark trap
+r1bqkbnr/6pp/p1p1pp2/3p4/2PN4/4P3/PP3PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: S\"amisch, Botvinnik variation *
+r1bqkbnr/p1pp1ppp/2n5/1p6/Q7/8/PPP1PPPP/RNB1KBNR w KQkq -
+Scandinavian, Mieses-Kotr\v c gambit *
+r1bqkbnr/p2p1ppp/1pn1p3/2p5/4P3/2NP1N2/PPP2PPP/R1BQKB1R b KQkq -
+Amsterdam attack *
+r1bqkbnr/p3pppp/2p5/2p5/2Pp1P2/6P1/PP1PP2P/RNBQK1NR b KQkq -
+Beefeater defense *
+r1bqkbnr/pp1n1ppp/2pp4/4p1N1/2BPP3/8/PPP2PPP/RNBQK2R b KQkq -
+Philidor: Hanham, Kmoch variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -
+Philidor: Hanham, Schlechter variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Philidor: Hanham, Delmar variation
+r1bqkbnr/pp1n1ppp/2pp4/4p3/2BPP3/5N2/PPP2PPP/RNBQ1RK1 b kq -
+Philidor: Hanham, Krause variation
+r1bqkbnr/pp1npppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Steinitz variation
+r1bqkbnr/pp1p1p1p/2n3p1/2p1p3/2P4P/2NP4/PP2PPP1/R1BQKBNR b KQkq -
+Sicilian: Gloria variation *
+r1bqkbnr/pp1p1ppp/2n1p3/1N6/4P3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian, Sz\'en (`anti-Taimanov') variation
+r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Taimanov variation
+r1bqkbnr/pp1p1ppp/2n1p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/2P5/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+English: Mikenas-Carls, Sicilian variation *
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/8/2N1PN2/PPPP1PPP/R1BQKB1R b KQkq -
+English: Mikenas-Carls, Kevitz variation *
+r1bqkbnr/pp1p1ppp/2n5/2p1p3/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+English: Mikenas-Carls variation *
+r1bqkbnr/pp1p1ppp/2n5/2p5/3Pp3/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+English: Mikenas-Carls, Flohr variation *
+r1bqkbnr/pp1p1ppp/2n5/4p3/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Labourdonnais-L\"owenthal variation
+r1bqkbnr/pp1ppp1p/2N3p1/8/4P3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian: accelerated fianchetto, exchange variation
+r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+English: Bremen, Smyslov system *
+r1bqkbnr/pp1ppp1p/2n3p1/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Sicilian: Nimzovich-Rossolimo attack (with ...g6, without ...d6)
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+English: Bremen, reverse dragon *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+English: Bremen system, Keres variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/2PP4/PP3PPP/RNBQKBNR b KQkq -
+English, Keres variation *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+English: Carls' Bremen system *
+r1bqkbnr/pp1ppp1p/2n3p1/2p5/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -
+English: Bremen system with ...g6 *
+r1bqkbnr/pp1ppp1p/2n3p1/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind
+r1bqkbnr/pp1ppp1p/2n3p1/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: accelerated fianchetto, modern variation
+r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Sicilian: Nimzovich-Rossolimo attack (without ...d6)
+r1bqkbnr/pp1ppppp/2n5/1Bp5/4P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+English, Kramnik-Shirov counterattack *
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: symmetrical variation
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: symmetrical variation
+r1bqkbnr/pp1ppppp/2n5/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: symmetrical variation *
+r1bqkbnr/pp1ppppp/2n5/2p5/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+English: Anglo-Gr\"unfeld defense *
+r1bqkbnr/pp1ppppp/2n5/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian defense
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Sicilian: closed
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+English: Sicilian reversed *
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Sicilian: closed, 2...Nc6
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Sicilian: chameleon variation
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian defense
+r1bqkbnr/pp1ppppp/2n5/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Sicilian: Grand Prix attack
+r1bqkbnr/pp1ppppp/2n5/2p5/8/2NP2P1/PPP1PP1P/R1BQKBNR b KQkq -
+Venezolana opening
+r1bqkbnr/pp1ppppp/2n5/2p5/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English opening *
+r1bqkbnr/pp1ppppp/2n5/8/7Q/2N5/PPP1PPPP/R1B1KBNR b KQkq -
+Novosibirsk opening
+r1bqkbnr/pp2p1pp/2n2p2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Kmoch variation *
+r1bqkbnr/pp2pp1p/2n3p1/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Romanishin-Kasparov (Steiner) system *
+r1bqkbnr/pp2pp1p/2n5/2pp2p1/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Spike gambit *
+r1bqkbnr/pp2ppp1/2np4/2p4p/2P1P3/2N3P1/PP1P1P1P/R1BQKBNR w KQkq -
+Sicilian: Gloria variation
+r1bqkbnr/pp2pppp/2n5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+Nimzo-Indian defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/1P2P3/P1P2PPP/RNBQKBNR b KQkq -
+QGD: Alapin variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: semi-Slav *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4P3/PPP1BPPP/RNBQK1NR b KQkq -
+QGD: Charousek (Petrosian) variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+QGD: 3.Nc3 *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+QGD: 3...Nf6 *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/3P4/P3P3/1PP2PPP/RNBQKBNR b KQkq -
+QGD: Janowski variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/3PP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+QGD Slav: Winawer counter-gambit *
+r1bqkbnr/pp2pppp/2n5/2pp4/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Old Indian: Ukrainian variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5B2/3P1N2/PPP1PPPP/RN1QKB1R b KQkq -
+Old Indian: Janowski variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch defense, Rubinstein variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch with c4 & Nc3 *
+r1bqkbnr/pp2pppp/2n5/2pp4/5P2/6PN/PPPPP2P/RNBQKB1R b KQkq -
+Dutch defense: Bladel variation *
+r1bqkbnr/pp2pppp/2n5/2pp4/8/3P2P1/PPP1PPBP/RNBQK1NR b KQkq -
+Modern defense *
+r1bqkbnr/pp2pppp/2n5/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian defense, 3.Nc3 *
+r1bqkbnr/pp2pppp/2n5/3P4/3p4/4P3/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch, von Hennig-Schara gambit *
+r1bqkbnr/pp2pppp/2n5/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+QGD: Tarrasch defense, 4.cd ed *
+r1bqkbnr/pp2pppp/2n5/3p4/3N4/6P1/PPP1PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld: exchange variation *
+r1bqkbnr/pp2pppp/2n5/3p4/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Nimzovich variation
+r1bqkbnr/pp2pppp/2n5/3p4/3p4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: exchange variation *
+r1bqkbnr/pp2pppp/2n5/8/1pPp4/P4N2/3PPPPP/RNBQKB1R w KQkq -
+Benk\"o gambit: Zaitsev system *
+r1bqkbnr/pp2pppp/8/n2P4/1Pp5/8/P4PPP/RNBQKBNR b KQkq b3
+QGD: Tarrasch defense, Tarrasch gambit *
+r1bqkbnr/pp3p1p/2n3p1/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian with e4 & g3 *
+r1bqkbnr/pp3pp1/2n4p/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Makagonov system (5.h3) *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: 4.e3 c5 *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/1P2PN2/P1PP1PPP/RNBQK2R b KQkq -
+Nimzo-Indian: Fischer variation *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/2N1PN2/PPPP1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: 4.e3, Taimanov variation *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQ1RK1 b kq -
+Nimzo-Indian: 4.e3 O-O *
+r1bqkbnr/pp3ppp/2n1p3/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: 4.e3 *
+r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+French: advance, Paulsen attack
+r1bqkbnr/pp3ppp/2n1p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR w KQkq -
+French: advance variation
+r1bqkbnr/pp3ppp/2n5/2P1p3/1PPp4/5N2/P3PPPP/RNBQKB1R b KQkq -
+QGA: Linares variation *
+r1bqkbnr/pp3ppp/2n5/2Ppp3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense, Alekhine variation *
+r1bqkbnr/pp3ppp/2n5/2p1p3/2PpP3/3P1NP1/PP3P1P/RNBQKB1R b KQkq -
+Czech Benoni: King's Indian system *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...e6 *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Panov-Botvinnik attack *
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+French: Tarrasch, open variation, main line
+r1bqkbnr/pp3ppp/2n5/2pp4/3P4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...g6 *
+r1bqkbnr/pp3ppp/2n5/2ppp3/3P4/2P1P3/PP3PPP/RNBQKBNR w KQkq -
+QGD: semi-Slav, Marshall gambit *
+r1bqkbnr/pp3ppp/2n5/2ppp3/5P2/3P2P1/PPP1P1BP/RNBQK1NR b KQkq -
+Modern defense: Averbakh system, Randspringer variation *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/2NP2P1/PPP1PPBP/R1BQK1NR b KQkq -
+Modern defense: Averbakh system, Kotov variation *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Modern defense: Averbakh system *
+r1bqkbnr/pp3ppp/2n5/2ppp3/8/5NP1/PPPPPPBP/RNBQK2R w KQkq -
+King's Indian: 4.e4 *
+r1bqkbnr/pp3ppp/2n5/3p4/2pP4/2N2NP1/PP2PP1P/R1BQKB1R w KQkq -
+QGD: Tarrasch, Folkestone (Swedish) variation
+r1bqkbnr/pp3ppp/2n5/3p4/2pPP3/2N2NP1/PP3P1P/R1BQKB1R b KQkq -
+QGD: Tarrasch, Schlechter-Rubinstein system, Rey Ardid variation
+r1bqkbnr/pp3ppp/2n5/3pp3/2PP4/8/PP3PPP/RNBQKBNR w KQkq -
+QGD: Tarrasch defense, Marshall gambit *
+r1bqkbnr/pp3ppp/2n5/4p3/2Pp4/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Benoni: 6.e4 *
+r1bqkbnr/pp3ppp/2n5/4p3/2Pp4/B2P1N2/4PPPP/RN1QKB1R w KQkq -
+Benk\"o gambit: 7.e4 *
+r1bqkbnr/pp3ppp/2np4/1N2p3/4P3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Labourdonnais-L\"owenthal (Kalashnikov) variation
+r1bqkbnr/pp4pp/2n2p2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, 5...O-O *
+r1bqkbnr/pp4pp/2n2p2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: S\"amisch variation *
+r1bqkbnr/pp4pp/2n5/2pppp2/8/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Four pawns attack *
+r1bqkbnr/pp4pp/2n5/4pp2/2Pp4/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: pawn storm variation *
+r1bqkbnr/pp4pp/2n5/5p2/2Ppp3/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: Mikenas variation *
+r1bqkbnr/ppnppppp/2p5/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+de Bruycker defense
+r1bqkbnr/ppp1pp1p/2n5/3p2p1/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch, Spielmann gambit *
+r1bqkbnr/ppp1pp1p/2np2p1/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Venezolana opening *
+r1bqkbnr/ppp1pppp/2n5/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn: Anti-Veresov *
+r1bqkbnr/ppp1pppp/2n5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Chigorin defense
+r1bqkbnr/ppp1pppp/2n5/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game, Chigorin variation
+r1bqkbnr/ppp1pppp/2n5/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Chigorin variation *
+r1bqkbnr/ppp1pppp/2n5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense, Bogolyubov variation
+r1bqkbnr/ppp1pppp/2n5/8/2Pp4/3P2P1/PP2PP1P/RNBQKBNR b KQkq -
+Old Benoni: Schmid's system *
+r1bqkbnr/ppp1pppp/2n5/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Chigorin defense, Janowski variation
+r1bqkbnr/ppp1pppp/2n5/8/Q1Pp4/5N2/PP1PPPPP/RNB1KB1R b KQkq -
+Woozle defense *
+r1bqkbnr/ppp2p1p/2n3p1/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Sveshnikov system *
+r1bqkbnr/ppp2p1p/2n5/3pP1p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Tartakower variation *
+r1bqkbnr/ppp2p1p/2np4/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R w KQkq -
+Vienna: Hamppe-Allgaier gambit, Alapin variation
+r1bqkbnr/ppp2pp1/6n1/3p3p/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, 6.h4 *
+r1bqkbnr/ppp2ppp/2n1p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, Guimard variation
+r1bqkbnr/ppp2ppp/2n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR b KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, advance variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4P3/PPPQ1PPP/RNB1K1NR b KQkq -
+French: Winawer, Petrosian variation *
+r1bqkbnr/ppp2ppp/2n5/1B1p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Dr. Olland (Dutch) variation *
+r1bqkbnr/ppp2ppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR b KQkq -
+French: Winawer (Nimzovich) variation *
+r1bqkbnr/ppp2ppp/2n5/3p4/3Pp3/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Steinitz variation *
+r1bqkbnr/ppp2ppp/2n5/3p4/3Q4/2N5/PPP1PPPP/R1B1KBNR w KQkq -
+KP: Nimzovich defense, Marshall gambit *
+r1bqkbnr/ppp2ppp/2n5/3p4/Q3P3/8/PPP2PPP/RNB1KBNR b KQkq -
+Scandinavian: Anderssen counter-attack *
+r1bqkbnr/ppp2ppp/2n5/3pP3/8/4P3/PPP2PPP/RNBQKBNR b KQkq -
+French: Rubinstein variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/1P1P4/2P5/P3PPPP/RNBQKBNR b KQkq -
+Caro-Kann: Gurgenidze counter-attack *
+r1bqkbnr/ppp2ppp/2n5/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Marshall variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense, Bogolyubov variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2P3P1/PP2PP1P/RNBQKBNR b KQkq -
+Caro-Kann: Gurgenidze system *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Paulsen variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Blackmar-Diemer gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Blackmar-Diemer: Lemberg counter-gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Fyfe gambit *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/2P5/PPNPPPPP/R1BQKBNR b KQkq -
+de Bruycker defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/2PP1N2/PP2PPPP/RNBQKB1R b KQkq -
+Pirc: Ufimtsev-Pytel variation *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/3P1NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Pirc defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR b KQkq -
+Robatsch (modern) defense *
+r1bqkbnr/ppp2ppp/2n5/3pp3/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -
+Robatsch defense *
+r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+QGD: Albin counter-gambit, Alapin variation
+r1bqkbnr/ppp2ppp/2n5/4P3/2Pp4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+QGD: Albin counter-gambit, 5.g3
+r1bqkbnr/ppp2ppp/2np4/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: old Steinitz defense
+r1bqkbnr/ppp2ppp/3p4/8/3QP3/3B4/PPP2PPP/RNB1K2R b KQkq -
+Scotch: Ghulam Kassim variation
+r1bqkbnr/ppp2ppp/8/3p4/8/2P2P2/PP2PP1P/RNBQKB1R b KQkq -
+Caro-Kann: Bronstein-Larsen variation *
+r1bqkbnr/ppp2ppp/8/3p4/8/2P2P2/PP3PPP/RNBQKB1R b KQkq -
+Caro-Kann: Tartakower (Nimzovich) variation *
+r1bqkbnr/ppp2ppp/8/3pn3/3Q4/4P3/PPP2PPP/RNB1KBNR b KQkq -
+French: Frere (Becker) variation *
+r1bqkbnr/ppp2ppp/8/3pn3/5B2/2P5/PP2PPPP/RN1QKBNR b KQkq -
+Caro-Kann: classical variation *
+r1bqkbnr/ppp2ppp/8/3pn3/8/2P5/PP1NPPPP/R1BQKBNR b KQkq -
+Caro-Kann: Steinitz variation *
+r1bqkbnr/ppp2ppp/8/3pn3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/ppp2ppp/8/3pn3/8/4P3/PPPN1PPP/R1BQKBNR b KQkq -
+French: Rubinstein variation *
+r1bqkbnr/ppp3pp/2n2p2/3pP3/8/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Rasa-Studier gambit *
+r1bqkbnr/ppp3pp/2n2p2/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Steinitz variation
+r1bqkbnr/ppp3pp/2n2p2/4P3/2Pp4/5N2/PP1NPPPP/R1BQKB1R w KQkq -
+QGD: Albin counter-gambit, Janowski variation
+r1bqkbnr/ppp3pp/2n5/3p1p2/3Pp2P/2P3P1/PP2PPB1/RNBQK1NR b KQkq -
+Robatsch defense: Gurgenidze variation *
+r1bqkbnr/ppp3pp/2n5/3ppP2/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Steinitz gambit *
+r1bqkbnr/ppp3pp/2n5/3ppp2/8/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Austrian attack *
+r1bqkbnr/ppp3pp/2n5/3ppp2/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: Pseudo-Austrian attack *
+r1bqkbnr/ppp3pp/2n5/5p2/2pPp3/2N1P3/PP1N1PPP/R1BQKB1R b KQkq -
+French: Steinitz variation *
+r1bqkbnr/ppp3pp/2np4/3Ppp2/4P3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Ponziani counter-gambit, Schmidt attack
+r1bqkbnr/ppp3pp/2np4/4N3/3Pp3/8/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit *
+r1bqkbnr/ppp3pp/2np4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Vienna gambit, Steinitz variation *
+r1bqkbnr/ppp3pp/6n1/3p1p2/8/2P3B1/PP2PPPP/RN1QKBNR w KQkq -
+Caro-Kann: classical, Mar\'oczy attack *
+r1bqkbnr/pppn1ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Hanham variation
+r1bqkbnr/pppn1ppp/4p3/8/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+French: Rubinstein variation
+r1bqkbnr/pppn1ppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, open, 4.ed ed *
+r1bqkbnr/pppn1ppp/8/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+French: Tarrasch, open variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P1P2/4P3/PPP3PP/RNBQKBNR b KQkq -
+French: Tarrasch, Haberditz variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/1QP5/PP2PPPP/RNB1KBNR b KQkq -
+Caro-Kann: Edinburgh variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/2N1P3/PPP2PPP/R1BQKBNR b KQkq -
+French: Tarrasch, Guimard variation *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: 3.Nd2 *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Tarrasch *
+r1bqkbnr/pppn1ppp/8/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French: Tarrasch, closed variation *
+r1bqkbnr/pppn2pp/3p4/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Keres variation *
+r1bqkbnr/pppnpppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Valencia opening *
+r1bqkbnr/pppp1p1p/2n3p1/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: fianchetto (Smyslov/Barnes) defense
+r1bqkbnr/pppp1p1p/2n3p1/3N4/3pP3/5N2/PPP2PPP/R1BQKB1R b KQkq -
+Three knights: Steinitz, Rosenthal variation
+r1bqkbnr/pppp1p1p/2n3p1/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: closed *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: closed, Korchnoi variation *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Steinitz variation
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Paulsen variation *
+r1bqkbnr/pppp1p1p/2n3p1/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna: Paulsen-Mieses variation *
+r1bqkbnr/pppp1p1p/2n5/1B2p1p1/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Brentano defense
+r1bqkbnr/pppp1p1p/2n5/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Neumann defense
+r1bqkbnr/pppp1p1p/2n5/6N1/4PppP/2N5/PPPP2P1/R1BQKB1R b KQkq -
+Vienna: Hamppe-Allgaier gambit
+r1bqkbnr/pppp1p1p/2n5/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Blachly gambit
+r1bqkbnr/pppp1p1p/2n5/6p1/3PPp2/2N2N2/PPP3PP/R1BQKB1R b KQkq -
+Vienna: Pierce gambit
+r1bqkbnr/pppp1p1p/2n5/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -
+KGA: Muzio gambit, Holloway defense
+r1bqkbnr/pppp1p1p/2n5/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQ1RK1 b kq -
+Vienna: Hamppe-Muzio gambit
+r1bqkbnr/pppp1ppp/2n5/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Ruy Lopez (Spanish opening)
+r1bqkbnr/pppp1ppp/2n5/1B6/3pP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Scotch: Relfsson gambit (`MacLopez')
+r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/2P2N2/P2P1PPP/RNBQK2R w KQkq -
+Evans gambit: Mayet defense
+r1bqkbnr/pppp1ppp/2n5/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+King's pawn game
+r1bqkbnr/pppp1ppp/2n5/4p3/2P1P3/5N2/PP1P1PPP/RNBQKB1R b KQkq -
+Dresden opening
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: three knights system
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+Sicilian: closed, 2...Nc6 *
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: Sicilian reversed
+r1bqkbnr/pppp1ppp/2n5/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: closed *
+r1bqkbnr/pppp1ppp/2n5/4p3/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: Scandinavian variation *
+r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Vienna: Fyfe gambit
+r1bqkbnr/pppp1ppp/2n5/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Scotch opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Three knights game
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Vienna: Paulsen variation
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Vienna game, Max Lange defense *
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna game, Max Lange defense
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/2P2N2/PP1P1PPP/RNBQKB1R b KQkq -
+Ponziani opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Vienna: Falkbeer variation *
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+King's pawn game
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5N2/PPPPBPPP/RNBQK2R b KQkq -
+Inverted Hungarian
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/5NP1/PPPP1P1P/RNBQKB1R b KQkq -
+Konstantinopolsky opening
+r1bqkbnr/pppp1ppp/2n5/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Vienna game *
+r1bqkbnr/pppp1ppp/2n5/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Vienna gambit
+r1bqkbnr/pppp1ppp/2n5/4p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+r1bqkbnr/pppp1ppp/2n5/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+r1bqkbnr/pppp1ppp/2n5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Maurian defense
+r1bqkbnr/pppp1ppp/2n5/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Scotch gambit
+r1bqkbnr/pppp1ppp/2n5/8/2Q1P3/8/PPP2PPP/RNB1KBNR b KQkq -
+Center game: Hall variation
+r1bqkbnr/pppp1ppp/2n5/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Scotch game
+r1bqkbnr/pppp1ppp/2n5/8/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: S\"amisch attack *
+r1bqkbnr/pppp1ppp/2n5/8/3P4/4p3/PPPNPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Spielmann variation *
+r1bqkbnr/pppp1ppp/2n5/8/3PPp2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Vienna: Steinitz gambit
+r1bqkbnr/pppp1ppp/2n5/8/3QP3/8/PPP2PPP/RNB1KBNR w KQkq -
+Center game
+r1bqkbnr/pppp1ppp/2n5/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Scotch: G\"oring gambit
+r1bqkbnr/pppp1ppp/2n5/8/4P3/4Q3/PPP2PPP/RNB1KBNR b KQkq -
+Center game: Paulsen attack
+r1bqkbnr/pppp1ppp/2n5/8/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -
+Vienna gambit
+r1bqkbnr/pppp1ppp/2n5/8/8/3Q4/PPP1PPPP/RNB1KBNR b KQkq -
+Scandinavian: Pytel-Wade variation *
+r1bqkbnr/pppp1ppp/8/1B2p3/3nP3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Bird's defense
+r1bqkbnr/pppp1ppp/8/4n3/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Irish (Chicago) gambit
+r1bqkbnr/pppp1ppp/8/4p3/3nP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Scotch: Lolli variation
+r1bqkbnr/pppp1ppp/8/nB2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Pollock defense
+r1bqkbnr/pppp2pp/2n2p2/1B2p3/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Nuremberg variation
+r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Ruy Lopez: Schliemann defense, Berger variation
+r1bqkbnr/pppp2pp/2n5/1B2pp2/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Ruy Lopez: Schliemann defense
+r1bqkbnr/pppp2pp/2n5/4Np2/4P3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Latvian: Fraser defense
+r1bqkbnr/pppp2pp/2n5/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Keres (Mason-Steinitz) gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Rousseau gambit
+r1bqkbnr/pppp2pp/2n5/4pp2/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: Grand Prix attack *
+r1bqkbnr/pppp2pp/2n5/4pp2/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Pelikan variation *
+r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Milner-Barry variation *
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Three knights: Winawer defense (Gothic defense)
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/2P2N2/PP1P1PPP/RNBQKB1R w KQkq -
+Ponziani counter-gambit
+r1bqkbnr/pppp2pp/2n5/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Vienna gambit *
+r1bqkbnr/pppp2pp/2n5/5p2/4P3/4Q3/PPP2PPP/RNB1KBNR w KQkq -
+Center game: l'Hermet variation
+r1bqkbnr/pppp3p/2n5/4Ppp1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Bird's opening, Swiss gambit *
+r1bqkbnr/ppppp1pp/2n2p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KP: Neo-Mongoloid defense
+r1bqkbnr/ppppp1pp/2n5/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+KP: Colorado counter
+r1bqkbnr/pppppppp/2n5/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Lundin (Kevitz-Mikenas) defense
+r1bqkbnr/pppppppp/2n5/8/3PP3/2P5/P4PPP/RNBQKBNR b KQkq -
+KP: Nimzovich defense, Wheeler gambit
+r1bqkbnr/pppppppp/2n5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Dunst (Sleipner,Heinrichsen) opening *
+r1bqkbnr/pppppppp/2n5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Nimzovich defense
+r1bqkbnr/pppppppp/2n5/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Dunst (Sleipner, Heinrichsen) opening *
+r1bqkbnr/pppppppp/n7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Lemming defense
+r1bqkbnr/pppppppp/n7/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Durkin's attack *
+r1bqnrk1/p2p1ppp/1pn1p3/2p5/2PPP3/P1PB4/4NPPP/R1BQK2R w KQ -
+Nimzo-Indian: S\"amisch, Capablanca variation
+r1bqnrk1/pp2b1pp/2n2p2/2p1p3/3pPP2/3P2P1/PPPNN1BP/R1BQ1RK1 b - -
+King's Indian: orthodox, Aronin-Taimanov, main line *
+r1bqnrk1/pp2b2p/2n2p2/2p1p1p1/3pPP2/3P2P1/PPPNN1BP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, Benk\"o attack *
+r1bqnrk1/pp2bppp/2n5/2p1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+King's Indian: orthodox, Aronin-Taimanov, 9.Ne1 *
+r1bqr1k1/1p1n1pbp/p2p1np1/2pP4/P7/2N3P1/1P1NPPBP/R1BQ1RK1 w - -
+Benoni: fianchetto, 11...Re8
+r1bqr1k1/p1p2ppp/2pp1n2/4p3/1b2P3/2NP1N2/PPP2PPP/R1BQ1RK1 w - -
+Four knights: Janowski variation *
+r1bqr1k1/pp1n1ppp/2p2n2/b2pp3/4P3/P1NP1N2/1PP1BPPP/R2QBRK1 b - -
+Ruy Lopez: Kecskem\'et variation *
+r1bqr1k1/pp1n1ppp/2pb1n2/3pN1B1/3P1P2/2N5/PPP1B1PP/R2QK2R w KQ -
+Petrov: classical attack, Berger variation *
+r1bqr1k1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 w - -
+King's Indian: orthodox, 7...Nbd7, 8.Re1 *
+r1bqr1k1/pp2ppbp/2n2np1/2pp4/5P2/3PPN2/PPP1B1PP/RNB1QRK1 w - -
+Dutch: Ilyin-Genevsky, Winter variation *
+r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N2P2/PP1NB1PP/R1BQ1RK1 b - -
+Benoni: classical, 11.f3
+r1bqr1k1/pp3pbp/n2p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 w - -
+Benoni: classical with ...Re8 and ...Na6
+r1bqr1k1/ppb2pp1/2p1nn1p/3pp3/NPP1P3/P2P1NP1/2QBBP1P/R3R1K1 b - -
+Ruy Lopez: closed, Chigorin, Yugoslav system *
+r1bqr1k1/ppbn1pp1/2p2n1p/3pp3/1PP1P3/P1NP1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Chigorin, 12...Nc6 *
+r1bqr1k1/ppbn1pp1/2p2n1p/3pp3/1PP1P3/P2P1N2/1B1NBPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Breyer, Gligori\'c variation *
+r1bqr1k1/ppbn1pp1/2p2n1p/4p3/1PPpP1P1/P2P1N2/2Q1BP1P/RNB1K2R b KQ -
+Ruy Lopez: closed, Leonhardt variation *
+r1bqr1k1/ppbn1pp1/2p2n1p/4p3/1Pp1P3/P1NP1N2/2Q1BPPP/R1B2RK1 w - -
+Ruy Lopez: closed, Chigorin, Rauzer attack *
+r1bqr1k1/ppbn1pp1/5n1p/3pp3/NP2P3/P2P1N2/2Q1BPPP/R1B2RK1 w - -
+Ruy Lopez: closed, Chigorin, 12...c5d4 *
+r1bqr1k1/ppp2ppp/2n2n2/2bPN3/3P4/2N5/PPP2PPP/R1BQKB1R w KQ -
+two knights defense: Canal variation *
+r1bqr1k1/ppp2ppp/2n2n2/3pp3/1b2P3/2NP1N2/PPPBBPPP/R2Q1RK1 b - -
+Ruy Lopez: Berlin defense, Tarrasch trap *
+r1bqr1k1/ppp2ppp/2n2n2/4N3/3PpP2/P1P5/2P3PP/R1BQKB1R w KQ -
+Ruy Lopez: Steinitz defense deferred, Boleslavsky variation *
+r1bqr1k1/ppp2ppp/2np1n2/8/1bB1P3/2N1Q2N/PPPB1PPP/2KR3R b - -
+Center game: Kupreichik variation
+r1bqr1k1/ppp2ppp/8/2PPn3/2B2Qn1/2N1Bp2/PPP2PPP/R3K2R w KQ -
+two knights: Max Lange attack, Marshall variation *
+r1bqr1k1/ppp2ppp/8/2PPn3/5Qn1/2N1Bp2/PPP2PPP/R3KB1R b KQ -
+two knights: Max Lange attack, Rubinstein variation *
+r1bqr1k1/ppp2ppp/8/3pn3/3Q4/P1P1B3/1PP2PPP/R3KB1R b KQ -
+Four knights: Spielmann variation *
+r1bqr1k1/ppp4p/8/2PPnpp1/6n1/1BN1BpQ1/PPP2PPP/2KR3R b - -
+two knights: Max Lange attack, Berger variation *
+r1bqr1k1/pppn1pbp/3p1np1/4p3/2PP4/2N1PN2/PP2BPPP/R1BQ1RK1 w - -
+R\'eti: King's Indian attack, French variation *
+r1bqr1k1/pppp1ppp/2n2n2/3NpQ2/1bP5/4PN2/PP1P1PPP/R1B1KB1R b KQ -
+English: four knights, Stean variation
+r1bqrbk1/pp3ppp/2n2n2/2ppp3/P3P3/2PP1NP1/1P1N1PBP/R1BQ1RK1 b - -
+King's Indian: orthodox, 7...Nbd7, main line *
+r1bqrnk1/ppp1bppp/5n2/3p2B1/3P4/2NBP3/PPQ1NPPP/2KR3R b - -
+QGD: exchange, chameleon variation
+r1br2k1/p1q1ppbp/1pn2np1/2pp4/1P1P4/2P1PN2/PB1NBPPP/R2Q1RK1 b - -
+Catalan: closed, Spassky gambit *
+r1br2k1/p3ppbp/1pn2np1/2pq4/8/PP1PPN2/1B1NBPPP/R2QK2R b KQ -
+English: symmetrical, hedgehog, flexible formation *
+r1br2k1/p4ppp/1qn2n2/2b5/B3p3/2N3Q1/PPPPNPPP/R1B1K2R w KQ -
+Evans gambit: compromised defense, Potter variation *
+r1br2k1/pp2qppp/1bn1pn2/3p4/1PP5/P2BPN2/1B1N1PPP/R2QK2R b KQ -
+QGA: classical, Smyslov variation *
+r1br2k1/ppq2ppp/2n1pn2/2P5/1P1p4/P3PN2/1BQ2PPP/R3KB1R b KQ -
+QGA: classical, Flohr variation *
+r1q2rk1/pp2ppbp/2npbnp1/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 w - -
+Sicilian: dragon, classical, R\'eti-Tartakower variation
+r1r3k1/pp1bppbp/2np1np1/q7/3NP2P/1BN1BP2/PPPQ2P1/2KR3R b - -
+Sicilian: dragon, Yugoslav attack, 12.h4
+r2n1rk1/ppp1qppp/3p1n2/1B2p1B1/3PP1b1/2P2N2/P1P2PPP/R2QR1K1 w - -
+Four knights: symmetrical, Capablanca variation
+r2q1bnr/ppp1kBpp/3p4/3NN3/4P3/8/PP3PPP/R1Bb1RK1 b - -
+Scotch: Sea-cadet mate
+r2q1knr/pppb1Bpp/1b1p4/n7/3PP3/2N2N2/P1Q2PPP/R1B2RK1 b - -
+Evans gambit: Fraser-Mortimer attack
+r2q1rk1/1b1nbppp/p2p1n2/1pp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Breyer, Gligori\'c variation
+r2q1rk1/1bp1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Flohr-Zaitsev system (Lenzerheide variation)
+r2q1rk1/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP1NQPPP/R1B2RK1 b - -
+Ruy Lopez: open, Malkin variation
+r2q1rk1/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP3PPP/RNBQR1K1 w - -
+Ruy Lopez: closed, Bogolyubov variation
+r2q1rk1/2p1bppp/p1npbn2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Kholmov variation
+r2q1rk1/2p1bppp/p3b3/1p1pn3/3Nn3/1BP5/PP3PPP/RNBQR1K1 w - -
+Ruy Lopez: open, Breslau variation
+r2q1rk1/2p2ppp/p1n1b3/1pbpP3/8/2P2N2/PPBN1nPP/R1BQ1RK1 w - -
+Ruy Lopez: open, Dilworth variation
+r2q1rk1/3nbppp/bpp1pn2/p2p4/2PP4/1P3NP1/PBQNPPBP/R4RK1 w - -
+Catalan: closed, Sokolsky variation
+r2q1rk1/p1p2ppp/2pp1n2/4p3/1b2P1b1/2NP1N2/PPP1QPPP/R1B2RK1 b - -
+Four knights: symmetrical, Metger unpin *
+r2q1rk1/p3bppp/1pn1bn2/2pp2B1/3P4/2N2NP1/PP2PPBP/2RQ1RK1 w - -
+QGD: Tarrasch, Stoltz variation
+r2q1rk1/p3n1pp/2p1bp2/3pp1B1/N1P5/6P1/PP2PbBP/R2Q1RK1 w - -
+Gr\"unfeld: exchange, Seville variation *
+r2q1rk1/p3n1pp/3bbp2/3pp3/N7/4B1P1/PP2PPBP/R2Q1RK1 b - -
+Gr\"unfeld: Spassky variation, main line, 13.Bd3 *
+r2q1rk1/p3n1pp/3bbp2/4p3/N2p4/4B1P1/PP2PPBP/R2Q1RK1 w - -
+Gr\"unfeld: exchange, Sokolsky variation *
+r2q1rk1/p3nppp/4b3/2bpp3/8/2N3P1/PP2PPBP/R1BQ1RK1 w - -
+Gr\"unfeld: Spassky variation, main line, 10...cd, 11.cd *
+r2q1rk1/p4ppp/2n1bn2/2bpp3/N7/1B1P1P2/PPP3PP/R1BQK1NR w KQ -
+Evans gambit: Steinitz variation *
+r2q1rk1/p4ppp/2n2n2/2bpp3/N5b1/1B1P4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: G\"oring attack *
+r2q1rk1/p4ppp/b1B2n2/2bp4/8/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Aitken variation *
+r2q1rk1/p4ppp/b1p2n2/2bpN3/3P4/2N5/PPP2PPP/R1BQK2R w KQ -
+Giuoco Piano: Steinitz variation *
+r2q1rk1/pb1nbppp/2p1pn2/1p1p4/2PP4/1PN2NP1/P1Q1PPBP/R1BR2K1 w - -
+Catalan: closed, Spassky gambit
+r2q1rk1/pp1bbppp/2nppn2/8/4PP2/1NN1B3/PPP1B1PP/R2Q1RK1 b - -
+Sicilian: modern Scheveningen, main line with Nb3
+r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/2KR3R b - -
+Sicilian: dragon, Yugoslav attack, 10.O-O-O
+r2q1rk1/pp1bppbp/2np1np1/8/2BNP3/2N1BP2/PPPQ2PP/R3K2R w KQ -
+Sicilian: dragon, Yugoslav attack, 9...Bd7
+r2q1rk1/pp2b1pp/2n1bn2/2pp4/4pB2/1NN1P3/PPPQBPPP/2KR3R b - -
+Alekhine's defense: four pawns attack, Tartakower variation *
+r2q1rk1/pp2bpp1/2n2n1p/2pp1b2/5B2/1NNP2P1/PP2PPBP/R2Q1RK1 w - -
+Alekhine's defense: exchange, Karpov variation *
+r2q1rk1/pp2bppp/2n1bn2/3p2B1/2pP4/2N2NP1/PP2PPBP/2RQ1RK1 w - -
+QGD: Tarrasch, Bogolyubov variation
+r2q1rk1/pp2bppp/2npbn2/2p3B1/4P3/2N2N2/PPP1BPPP/R2QR1K1 b - -
+Philidor: Berger variation
+r2q1rk1/pp2pBbp/6p1/n1p5/3PP1b1/2P1BP2/P3N1PP/R2Q1RK1 b - -
+Gr\"unfeld: exchange, Seville variation
+r2q1rk1/pp2ppbp/1nnp2p1/5b2/2PP1B2/2N2N1P/PP2BPP1/R2Q1RK1 b - -
+Alekhine's defense: exchange, Karpov variation
+r2q1rk1/pp2ppbp/2n2np1/3p4/2PP2b1/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+QGD: Tarrasch, Prague variation, 9.Bg5 *
+r2q1rk1/pp2ppbp/3p1np1/n4P2/2b1P3/1NNBB3/PPP3PP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Spielmann variation
+r2q1rk1/pp2ppbp/4b1p1/n2P4/4P3/3BBP2/P3N1PP/R2Q1RK1 b - -
+Gr\"unfeld: exchange, Sokolsky variation
+r2q1rk1/pp2ppbp/4b1p1/n7/3PP3/3BBP2/P3N1PP/R2Q1RK1 w - -
+Gr\"unfeld: Spassky variation, main line, 13.Bd3
+r2q1rk1/pp2ppbp/5np1/n2p1P2/4P3/1NNPB3/PP4PP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Bernard defense
+r2q1rk1/pp4pp/1nnpb3/4p3/N2P1p2/5NP1/PP2PPBP/R2Q1RK1 b - -
+Sicilian: dragon, classical, Bernard defense *
+r2q1rk1/ppp1b1pp/1nn1b3/4pp2/8/2NPBNP1/PP2PPBP/R1Q2RK1 b - -
+Sicilian: dragon, classical, R\'eti-Tartakower variation *
+r2q1rk1/ppp1b1pp/1nn1b3/4pp2/8/2NPPN2/PP1BBPPP/R2Q1RK1 w - -
+Sicilian: modern Scheveningen, main line with Nb3 *
+r2q1rk1/ppp1b1pp/2n1b3/3n1p2/4p3/1QNP1NP1/PP2PPBP/R1B2RK1 w - -
+Sicilian: dragon, classical, Zollner gambit *
+r2q1rk1/ppp1b1pp/2n1b3/3npp2/8/2NPPN2/PP2BPPP/R1BQ1RK1 w - -
+Sicilian: modern Scheveningen, main line *
+r2q1rk1/ppp1b1pp/2n1b3/3npp2/8/P1NPPN2/1PQ2PPP/R1B1KB1R w KQ -
+Sicilian: Scheveningen, classical *
+r2q1rk1/ppp1bppp/1nn1b3/4p3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, 9.Nb3 *
+r2q1rk1/ppp1bppp/1nn1b3/4p3/P7/2NP1NP1/1P2PPBP/R1BQ1RK1 b - -
+Sicilian: dragon, classical, Alekhine variation *
+r2q1rk1/ppp1bppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQ -
+Sicilian: dragon, classical, 8.O-O *
+r2q1rk1/ppp1ppbp/1nn3p1/8/3PP1b1/2NQBN2/PP2BPPP/2KR3R b - -
+Gr\"unfeld: Russian, Keres variation
+r2q1rk1/ppp1ppbp/2np1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, lesser Simagin (Spassky) variation
+r2q1rk1/ppp1ppbp/2np1np1/8/2PP2b1/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Simagin variation
+r2q1rk1/ppp2ppp/1bnp4/1B2p2n/3PP1b1/2PQ1N2/PP2NPPP/R1B2RK1 b - -
+Four knights: symmetrical, Blake variation *
+r2q1rk1/ppp2ppp/2n2n2/3pp3/1b2P1b1/2NP1N2/PPPBBPPP/R2QK2R w KQ -
+Ruy Lopez: closed Berlin defense, Bernstein variation *
+r2q1rk1/ppp2ppp/2np1n2/1B2p3/1b2P1b1/2NPBN2/PPP2PPP/R2Q1RK1 b - -
+Four knights: symmetrical, Tarrasch variation *
+r2q1rk1/ppp2ppp/2np1n2/1B2p3/1b2P1b1/3P1N2/PPP1NPPP/R1BQ1RK1 b - -
+Four knights: symmetrical, Pillsbury variation *
+r2q1rk1/ppp2ppp/2npbn2/1B2p1B1/1b2P3/2NP1N2/PPP2PPP/R2Q1RK1 w - -
+Four knights: symmetrical, Tarrasch variation
+r2q1rk1/ppp3pp/1nnbb3/2B1p3/N4p2/3P1NP1/PP2PPBP/R2Q1RK1 w - -
+Sicilian: dragon, classical, Spielmann variation *
+r2q1rk1/ppp3pp/2n5/2bNp3/4P1b1/5N2/PPP1QPPP/R1B1K2R w KQ -
+Giuoco piano: Holzhausen attack *
+r2q1rk1/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQR1K1 w - -
+Ruy Lopez: Berlin defense, Tarrasch trap
+r2q1rk1/pppnbppp/8/8/1n6/2N3Q1/PPPP1PPP/R1BK2NR b - -
+Scotch: Rosenthal variation *
+r2q2k1/pp3ppp/8/2b1r3/3p4/3P4/PPP1NPPn/R1BQ1RK1 w - -
+Giuoco Piano: Therkatz-Herzog variation *
+r2qbrk1/1pp1bppp/p1np1n2/4p3/B2PP3/2P2N2/PP1N1PPP/R1BQR1K1 w - -
+Ruy Lopez: Kecskem\'et variation
+r2qk1nr/pp2bppp/2n1b3/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Semi-Averbakh system *
+r2qk1nr/pp2bppp/2n5/2p1p3/2Pp2b1/3PPNP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: Averbakh, main line *
+r2qk1nr/pp2bppp/2n5/2ppp3/2P3b1/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+King's Indian: Averbakh, 6...c5 *
+r2qk1nr/pp2bppp/2n5/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Averbakh system *
+r2qk1nr/pp4pp/2nbbp2/2ppp3/8/P1PP1NP1/1P2PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, Byrne variation *
+r2qk1nr/ppp1npbp/3pb1p1/3Np3/2P5/4P1P1/PP1P1PBP/R1BQK1NR w KQkq -
+Sicilian: closed, Smyslov variation *
+r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2N1P1P1/PP1PNPBP/R1BQK2R w KQkq -
+English: closed, Hort variation
+r2qk1nr/ppp2pbp/2npb1p1/4p3/2P5/2NP2P1/PP2PPBP/R1BQK1NR w KQkq -
+Sicilian: closed, 6.Be3 *
+r2qk1nr/ppp2ppp/1bnp4/8/2BPP1b1/2N2N2/P4PPP/R1BQ1RK1 w kq -
+Evans gambit
+r2qk1nr/ppp2ppp/1bnp4/8/Q1BPP1b1/2N2N2/P4PPP/R1B2RK1 b kq -
+Evans gambit: Fraser attack
+r2qk1nr/ppp2ppp/2nb4/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Tarrasch variation *
+r2qk1nr/ppp2ppp/2np4/2b5/2BpP1b1/2P2N2/PP3PPP/RNBQ1RK1 w kq -
+Scotch gambit: Anderssen (Paulsen, Suhle) counter-attack
+r2qk1nr/ppp2ppp/2np4/b3p3/2BPP1b1/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Alapin-Steinitz variation
+r2qk1nr/pppb1ppp/2nb4/1B1p4/2PQ4/4P3/PP3PPP/RNB1K1NR w KQkq -
+French: Winawer, Kondratiyev variation *
+r2qk1nr/pppb1ppp/2np4/b3p3/2BPP3/2P2N2/P4PPP/RNBQ1RK1 w kq -
+Evans gambit: Sanders-Alapin variation
+r2qk2r/1b1n1ppp/p2bpn2/1pp5/3P4/1BN1PN2/PP2QPPP/R1BR2K1 w kq -
+QGA: classical, Smyslov variation
+r2qk2r/1b1nbppp/pp1ppn2/8/2PQ4/1PN2NP1/P3PPBP/R1BR2K1 w kq -
+English: symmetrical, hedgehog, flexible formation
+r2qk2r/1bppbppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQR1K1 w kq -
+Ruy Lopez: Trajkovi\'c counter-attack
+r2qk2r/1p1bbppp/p1nppn2/6B1/3NPP2/2N5/PPPQ2PP/2KR1B1R w kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/2P1n3/1B3N2/PP2QPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Howell attack, Adam variation
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, classical defense
+r2qk2r/2p1bppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQR1K1 b kq -
+Ruy Lopez: open, 9...Be7, 10.Re1
+r2qk2r/2p1bppp/p1np1n2/1p2p3/3PP1b1/1BP2N2/PP2QPPP/RNB1K2R w KQkq -
+Ruy Lopez: Wormald attack, Gr\"unfeld variation
+r2qk2r/2p1nppp/p3b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 w kq -
+Ruy Lopez: open, Motzko attack, Nenarokov variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP1N1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, St. Petersburg variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Italian variation
+r2qk2r/2p2ppp/p1n1b3/1pbpP3/4n3/1BPQ1N2/PP3PPP/RNB2RK1 b kq -
+Ruy Lopez: open, Motzko attack
+r2qk2r/3bbppp/p1nppB2/1p6/4PP2/2N2N2/PPPQ2PP/2KR1B1R b kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6
+r2qk2r/p1pn1ppp/8/3pp3/Np2b1Q1/1B6/PPP2K1P/R1B3R1 w kq -
+Evans gambit declined, Pavlov variation *
+r2qk2r/pp1bppbp/2n2np1/2ppN3/8/1P2P3/PBPPBPPP/RN1QK2R w KQkq -
+Queen's Indian: Opo\v censky variation *
+r2qk2r/pp2b1pp/2n1b3/2pnpp2/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w kq -
+King's Indian: Four pawns attack, main line *
+r2qk2r/pp2bpp1/2n2nb1/2p1p2p/3pP1PN/3P3P/PPPN1PB1/R1BQ1RK1 w kq -
+King's Indian: Petrosian system, Keres variation *
+r2qk2r/pp2bppp/2n1bn2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: Gligori\'c-Taimanov system *
+r2qk2r/pp3ppp/2n1pn2/3p1b2/1b1P1B2/1QN1PN2/PP3PPP/R3KB1R w KQkq -
+QGD Slav: exchange, Trifunovi\'c variation
+r2qk2r/pp3ppp/2nbp3/3p4/3Pn1b1/1P3N2/PBP1BPPP/RN1Q1RK1 w kq -
+QGD: Pillsbury attack *
+r2qk2r/pp3ppp/2nbpn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Botvinnik variation *
+r2qk2r/ppp1b1pp/2n5/3p1p2/2PPn1b1/3B1N2/PP3PPP/RNBQR1K1 b kq -
+Petrov: classical attack, Krause variation
+r2qk2r/ppp1b1pp/2n5/3p1p2/3Pn1b1/2PB1N2/PP1N1PPP/R1BQR1K1 b kq -
+Petrov: classical attack, Berger variation
+r2qk2r/ppp1bppp/1nn1b3/4p3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -
+Sicilian: dragon, classical, Nottingham variation *
+r2qk2r/ppp1bppp/2n1b3/3np3/8/3P1NP1/PP2PPBP/RNBQK2R w KQkq -
+Sicilian: dragon, classical attack *
+r2qk2r/ppp1bppp/2n1b3/3np3/8/P1N1P3/1PQP1PPP/R1B1KBNR w KQkq -
+Sicilian: Taimanov variation *
+r2qk2r/ppp2p1p/2n1bPp1/2b3N1/2pp4/8/PPP2PPP/RNBQR1K1 w kq -
+two knights: Max Lange attack, Loman defense
+r2qk2r/ppp2pPp/2n1b3/2b5/2pp4/5N2/PPP2PPP/RNBQR1K1 b kq -
+two knights: Max Lange attack, Schlechter variation
+r2qk2r/ppp2ppp/2n1b3/2bnp3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+Sicilian: accelerated fianchetto, modern variation with Bc4 *
+r2qk2r/ppp2ppp/2n1b3/2bnp3/8/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Sozin, 7.Be3 *
+r2qk2r/ppp2ppp/2n5/3np3/1b4b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Margate (Alekhine) variation *
+r2qk2r/ppp2ppp/2np1n2/2b1p3/2B1P1b1/2NP1N2/PPP2PPP/R1BQK2R w KQkq -
+Giuoco Pianissimo: Canal variation *
+r2qk2r/ppp2ppp/2np1n2/2b5/2B1Pp2/2NP1Q1P/PPP3P1/R1B1K2R w KQkq -
+KGD: classical, Svenonius variation
+r2qk2r/ppp3pp/1bn1b3/3npp2/8/2NPPN2/PP2BPPP/R1BQ1RK1 w kq -
+Sicilian: Sozin, Fischer variation *
+r2qk2r/ppp3pp/2n5/3p1p2/2PPn1bb/3B1N2/PP3PPP/RNBQR1K1 w kq -
+Petrov: classical attack, Mar\'oczy variation
+r2qk2r/pppbbppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 b kq -
+Ruy Lopez: closed Berlin defense, Showalter variation
+r2qk2r/pppbbppp/2np1n2/1B2p1B1/3PP3/2N2N2/PPP2PPP/R2Q1RK1 b kq -
+Ruy Lopez: closed Berlin defense, Bernstein variation
+r2qk2r/pppbbppp/2np1n2/1B2p3/3PP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -
+Ruy Lopez: Berlin defense, hedgehog variation
+r2qkb1r/1bpp1ppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Archangelsk (counterthrust) variation
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/1P6/1QP1P3/P4PPP/RNB1K1NR b KQkq -
+QGD: semi-Slav, Junge variation *
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/1P6/2P1P3/P3QPPP/RNB1K1NR b KQkq -
+QGD: semi-Slav, Koomen variation *
+r2qkb1r/1p1b1ppp/2n1pn2/pBPp4/PP6/2P1P3/5PPP/RNBQK1NR b KQkq -
+QGD: semi-Slav, Abrahams variation *
+r2qkb1r/1p1b1ppp/p1nppn2/6B1/3NP3/2N5/PPPQ1PPP/2KR1B1R w kq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7
+r2qkb1r/1p3ppp/p1npbn2/4p1B1/4P3/N1N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Pelikan, Bird variation
+r2qkb1r/1ppbnppp/p1np4/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, Rubinstein variation
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP1QPPP/RNB2RK1 b kq -
+Ruy Lopez: open, Howell attack
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, 8...Be6
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1B3N2/PPPN1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Bernstein variation
+r2qkb1r/2p2ppp/p1n1b3/1p1pP3/4n3/1BP2N2/PP3PPP/RNBQ1RK1 b kq -
+Ruy Lopez: open, 9.c3
+r2qkb1r/2p2ppp/p1n1b3/1pn1P1N1/3p4/1BP5/PP1N1PPP/R1BQ1RK1 b kq -
+Ruy Lopez: open, Bernstein variation, Karpov gambit
+r2qkb1r/2p2ppp/p1n1b3/1pnpP3/8/1BP2N2/PP3PPP/RNBQ1RK1 w kq -
+Ruy Lopez: open, Berlin variation
+r2qkb1r/2p2ppp/p1pp1n2/4p3/3PP1b1/5N2/PPP2PPP/RNBQ1RK1 w kq -
+Ruy Lopez: Steinitz defense deferred, Lipnitsky variation
+r2qkb1r/p2b1ppp/5n2/1B1pp3/Q7/4P3/PP3PPP/RNB1K2R b KQkq -
+QGD: Semi-Tarrasch, San Sebastian variation *
+r2qkb1r/p3pppp/2p5/2pn3b/4N3/5N1P/PPPP1PP1/R1BQK2R b KQkq -
+English: Nenarokov variation *
+r2qkb1r/p4ppp/2p1pn2/3p4/3p4/4P2P/PPP1QPP1/RNB2RK1 w kq -
+QGD: Lasker defense, main line *
+r2qkb1r/pb1n1ppp/2p1pn2/1p6/3P4/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: Meran, Wade variation
+r2qkb1r/pp1b1ppp/2n1pn2/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld: Opo\v censky variation *
+r2qkb1r/pp1bppp1/5n1p/1BpP4/4p3/2N5/PPP1QPPP/R3K1NR b KQkq -
+QGD: Albin counter-gambit, Kr\'enosz variation *
+r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Larsen variation
+r2qkb1r/pp1bpppp/2np1n2/6B1/3NP3/2N5/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Richter-Rauzer, Larsen variation, 7.Qd2
+r2qkb1r/pp1n1ppp/2n1p3/2Pp4/Q5b1/2P1PN2/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense, Rubinstein variation *
+r2qkb1r/pp1n1ppp/4pn2/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Capablanca variation *
+r2qkb1r/pp2n1pp/2n1bp2/2p1p3/3PP3/3P1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox main line *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/4P3/2PP1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox, 7.Nge2 c6 *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/8/2NP1NP1/PPP1PPBP/1RBQ1RK1 b kq -
+King's Indian: S\"amisch, Ruban variation *
+r2qkb1r/pp2n1pp/2n1bp2/2ppp3/8/P1NP1NP1/1PP1PPBP/R1BQ1RK1 b kq -
+King's Indian: S\"amisch, Panno formation *
+r2qkb1r/pp2pppp/2n2n2/1BPp4/6b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Ragozin, Vienna variation *
+r2qkb1r/pp2pppp/2n2n2/1Bpp3b/8/1P2PN1P/PBPP1PP1/RN1QK2R b KQkq -
+Queen's Indian: 4.Nc3, main line *
+r2qkb1r/pp2pppp/2n2n2/2Pp4/6b1/2P1PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD semi-Slav: 5.Bg5 dc *
+r2qkb1r/pp2pppp/2n2n2/2pp1b2/3P4/4PN2/PPP1BPPP/RNBQK2R w KQkq -
+QGD: classical variation (5.Bf4) *
+r2qkb1r/pp2pppp/2n2n2/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.Bf4 *
+r2qkb1r/pp2pppp/2n2n2/2pp4/2PP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch defense, Pillsbury variation *
+r2qkb1r/pp2pppp/2n2n2/2pp4/3P2b1/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Gr\"unfeld: 5.Bg5 *
+r2qkb1r/pp2pppp/2n2n2/2pp4/6b1/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: Smyslov system *
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD Slav: exchange variation, 6.Bf4 Bf5 *
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P1B2/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD Slav: exchange variation, 6.Bf4 Bf5
+r2qkb1r/pp2pppp/2n2n2/3p1b2/3P4/5N2/PPPN1PPP/R1BQKB1R w KQkq -
+QGD: exchange, S\"amisch variation *
+r2qkb1r/pp2pppp/2n2n2/8/2Pp2b1/3P1NP1/PP3P1P/RNBQKB1R w KQkq -
+Benoni: Uhlmann variation *
+r2qkb1r/pp2pppp/2n2nb1/2pp4/6PN/1P2P2P/PBPP1P2/RN1QKB1R b KQkq -
+Queen's Indian: 4.Nc3, Botvinnik variation *
+r2qkb1r/pp2pppp/n1p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R w KQkq -
+QGD Slav: Dutch, Lasker variation
+r2qkb1r/pp2pppp/n1p2n2/8/P1pPP1b1/2N2N2/1P3PPP/R1BQKB1R w KQkq -
+QGD Slav: Smyslov variation
+r2qkb1r/pp3p1p/2n3p1/2Pp4/1P2p1b1/2P1PN2/P2N1P2/R1BQKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Lilienthal variation *
+r2qkb1r/pp3ppp/2n1b3/2pnp1N1/8/2N3P1/PP1PPPBP/R1BQK2R b KQkq -
+Sicilian: accelerated fianchetto, Breyer variation *
+r2qkb1r/pp3ppp/2n1bn2/2ppp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Larsen variation *
+r2qkb1r/pp3ppp/2n1pn2/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Gr\"unfeld with Bf4 & e3 *
+r2qkb1r/pp3ppp/2n1pn2/2pp3b/3P4/1P2PN1P/P1P1BPP1/RNBQ1RK1 b kq -
+QGD: Tartakower (Makagonov-Bondarevsky) system *
+r2qkb1r/pp3ppp/2n1pn2/2pp3b/3P4/4PN1P/PPP1BPP1/RNBQ1RK1 w kq -
+QGD: Neo-orthodox variation, 7.Bh4 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN1P/PPP1BPP1/RNBQ1RK1 b kq -
+QGD: Neo-orthodox variation *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 w kq -
+QGD: 6.Nf3 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 b kq -
+QGD: Orthodox defense *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/3P4/4Pb1P/PPP1BPP1/RNBQ1RK1 w kq -
+QGD: Neo-orthodox variation, 7.Bxf6 *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/Q2P2b1/2P1PN2/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense *
+r2qkb1r/pp3ppp/2n1pn2/2pp4/Q2P4/2P1Pb2/PP1N1PPP/R1B1KB1R w KQkq -
+QGD: Cambridge Springs defense, Capablanca variation *
+r2qkb1r/pp3ppp/2n1pn2/2ppN2b/3P4/4P2P/PPP1BPP1/RNBQ1RK1 b kq -
+QGD: Lasker defense *
+r2qkb1r/pp3ppp/2n1pn2/3p3b/3N4/1P2P2P/P1P1BPP1/RNBQ1RK1 b kq -
+QGD: Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5 *
+r2qkb1r/pp3ppp/2n1pn2/3p4/Q2N2b1/2P1P3/PP1N1PPP/R1B1KB1R b KQkq -
+QGD: Cambridge Springs defense, Yugoslav variation *
+r2qkb1r/pp3ppp/2n1pn2/3p4/Q2p2b1/2P1PN2/PP1N1PPP/R1B1KB1R w KQkq -
+QGD: Cambridge Springs defense, 7.cd *
+r2qkb1r/pp3ppp/2n2n2/2Ppp3/6b1/2P1PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD semi-Slav: Botvinnik system (anti-Meran) *
+r2qkb1r/pp3ppp/2n2n2/2pp4/3P2b1/2N2NP1/PP2PPBP/R1BQK2R w KQkq -
+QGD: Tarrasch, Wagner variation
+r2qkb1r/pp3ppp/2n2n2/2ppp3/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Alekhine variation *
+r2qkb1r/pp3ppp/2n2n2/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+King's Indian: Zinnowitz variation *
+r2qkb1r/pp3ppp/2n2n2/4p3/2Pp2b1/3P1NP1/PP3PBP/RNBQK2R w KQkq -
+Benoni: classical, 8.Bg5 *
+r2qkb1r/pp3ppp/2n5/2Pp3P/1P2n3/2P1Pp1P/P4P2/RNBQKB1R w KQkq -
+QGD semi-Slav: Ekstrom variation *
+r2qkb1r/pp3ppp/2n5/2Pp3b/1P1Np1n1/2P1P2P/P4P2/RNBQKB1R b KQkq -
+QGD semi-Slav: anti-Meran, Alatortsev system *
+r2qkb1r/pp3ppp/2n5/2Pp3b/1P2p1n1/2P1PN1P/P4P2/RNBQKB1R w KQkq -
+QGD semi-Slav: anti-Meran gambit *
+r2qkb1r/ppp1p1pp/1nn1p3/2P5/3P2b1/5N2/PP4PP/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, Ilyin-Genevsky variation
+r2qkb1r/ppp2ppp/1nn5/4p3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Pod\v ebrady variation *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/2N1P3/PPQP1PPP/R1B1KBNR w KQkq -
+Sicilian: Taimanov variation *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/3P1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Sicilian: dragon, 6.Be3 *
+r2qkb1r/ppp2ppp/2n1b3/3np3/8/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, Byrne (English) attack *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1N2/PP1BPPPP/R2QKB1R b KQkq -
+Sicilian: Richter-Rauzer, Larsen variation *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1N2/PP2PPPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NP1NP1/PP2PP1P/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, Bondarevsky variation *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, 6...e6 *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/P2P1N2/1P2PPPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 6.Bg5 *
+r2qkb1r/ppp2ppp/2n5/3np3/6b1/P2PPN2/1P3PPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf, 6...e6 *
+r2qkb1r/ppp2ppp/2n5/4p3/6b1/2nPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Richter attack *
+r2qkb1r/ppp2ppp/n1n5/4p3/1P2P1b1/P1NP1N2/5PPP/R1BQKB1R b KQkq -
+Sicilian: Pelikan, Chelyabinsk variation *
+r2qkb1r/ppp2ppp/n1n5/4p3/4P1b1/P1NPBN2/1P3PPP/R2QKB1R b KQkq -
+Sicilian: Pelikan, Bird variation *
+r2qkb1r/ppp2ppp/n7/4p3/1P1nPP2/P1NP4/5P1P/R1BQKB1R b KQkq -
+Sicilian: Sveshnikov variation *
+r2qkb1r/ppp3pp/2n1bn2/3p1p2/2PPp3/2N1P3/PP1N1PPP/R1BQKB1R w KQkq -
+French: Steinitz, Boleslavsky variation *
+r2qkb1r/ppp3pp/2n1bn2/3ppp2/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Pirc: Austrian attack, 6.Be3 *
+r2qkb1r/ppp3pp/2n1bp2/3np3/8/3P1NP1/PP2PPBP/RNBQ1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, 7...O-O *
+r2qkb1r/ppp3pp/2n1bp2/3np3/8/3P1NP1/PP2PPBP/RNBQK2R w KQkq -
+Sicilian: dragon, Yugoslav attack *
+r2qkb1r/ppp3pp/2n5/3npp2/1P4b1/P2PPN2/5PPP/RNBQKB1R b KQkq -
+Sicilian: Najdorf, Polugayevsky variation *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/P2PPN2/1P2BPPP/RNBQK2R b KQkq -
+Sicilian: Najdorf, 7...Be7 *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/P2PPN2/1P3PPP/RNBQKB1R w KQkq -
+Sicilian: Najdorf, 7.f4 *
+r2qkb1r/ppp3pp/2n5/3npp2/6b1/PQ1PPN2/1P3PPP/RNB1KB1R b KQkq -
+Sicilian: Najdorf, 7...Qb6 *
+r2qkb1r/pppb1ppp/2Bp1n2/4p3/3PP3/2N2N2/PPP2PPP/R1BQK2R b KQkq -
+Ruy Lopez: old Steinitz defense, Nimzovich attack
+r2qkb1r/pppb1ppp/2n2n2/1B6/Q3p3/2N5/PPP2PPP/R1B1K1NR w KQkq -
+Scandinavian: Anderssen counter-attack orthodox attack *
+r2qkb1r/pppb1ppp/2np1n2/1B6/3pP3/2N2N2/PPP2PPP/R1BQ1RK1 w kq -
+Ruy Lopez: closed Berlin defense, Wolf variation
+r2qkb1r/pppn2p1/8/3pNbPp/3Pn3/8/PPP2P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano defense, Caro variation *
+r2qkbnr/1p3ppp/p1n1p3/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Capablanca anti-Cambridge Springs variation *
+r2qkbnr/1pp2pp1/p1p5/4p2p/4P1b1/5N1P/PPPP1PP1/RNBQ1RK1 w kq -
+Ruy Lopez: exchange variation, Alapin gambit
+r2qkbnr/1pp3pp/p1np4/4pb2/B7/2P2N2/PP1P1PPP/RNBQ1RK1 b kq -
+Ruy Lopez: Siesta, Kopayev variation
+r2qkbnr/1ppb1p1p/p1np2p1/4p3/B2PP3/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense, fianchetto (Bronstein) variation
+r2qkbnr/1ppb1ppp/p1np4/4p3/B3P3/2P2N2/PP1P1PPP/RNBQK2R w KQkq -
+Ruy Lopez: modern Steinitz defense
+r2qkbnr/pp1b1ppp/2n1p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+French: advance, Euwe variation
+r2qkbnr/pp1nppp1/2p3bp/7P/3P4/5NN1/PPP2PP1/R1BQKB1R b KQkq -
+Caro-Kann: classical, Spassky variation
+r2qkbnr/pp1nppp1/2p3bp/8/3P3P/5NN1/PPP2PP1/R1BQKB1R w KQkq -
+Caro-Kann: classical, 7...Nd7
+r2qkbnr/pp2pppp/2n5/1Bp4b/1PPp4/4PN1P/P2P1PP1/RNBQK2R b KQkq -
+Nimzo-Indian: Leningrad, ...b5 gambit *
+r2qkbnr/pp2pppp/2n5/1Bp4b/2Pp4/3PPN1P/PP3PP1/RNBQK2R b KQkq -
+Nimzo-Indian: Leningrad, main line *
+r2qkbnr/pp2pppp/2n5/1Bpp4/6b1/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+Nimzo-Indian: Leningrad variation *
+r2qkbnr/pp2pppp/2n5/2pp1b2/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: Harrwitz attack *
+r2qkbnr/pp2pppp/2n5/2pp1b2/3P4/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: 4.Bf4 *
+r2qkbnr/pp2pppp/2n5/2pp4/2PP2b1/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD: Been-Koomen variation *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+QGD: 4.Bg5 Be7 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: 4.Bg5 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/4PN2/PPPN1PPP/R1BQKB1R b KQkq -
+QGD: 4.Bg5 Nbd7 *
+r2qkbnr/pp2pppp/2n5/2pp4/3P2b1/5NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Gr\"unfeld: Stockholm variation *
+r2qkbnr/pp2pppp/2n5/3p4/2Pp2b1/1Q2PN2/PP3PPP/RNB1KB1R b KQkq -
+QGD: Canal (Venice) variation *
+r2qkbnr/pp2pppp/2n5/3p4/2Pp2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch *
+r2qkbnr/pp2pppp/2n5/3p4/3P2b1/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+QGD: exchange, positional line, 5...c6 *
+r2qkbnr/pp2pppp/2n5/3p4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+QGD: exchange, positional line *
+r2qkbnr/pp3ppp/2n1p3/1Bpp4/3P2b1/4PN2/PPPN1PPP/R1BQK2R b KQkq -
+QGD: Manhattan variation *
+r2qkbnr/pp3ppp/2n1p3/2pp1b2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 b kq -
+Gr\"unfeld: Gr\"unfeld gambit *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/2P1PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD: 5...c6 *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPP1BPPP/RNBQ1RK1 b kq -
+QGD: 4.Bg5 Be7, 5.e3 O-O *
+r2qkbnr/pp3ppp/2n1p3/2pp4/3P2b1/4PN2/PPPN1PPP/R1BQKB1R w KQkq -
+QGD *
+r2qkbnr/pp3ppp/2n1p3/2ppN3/3P2b1/4P3/PPP1BPPP/RNBQK2R b KQkq -
+QGD: Lasker variation *
+r2qkbnr/pp3ppp/2n5/2P5/N2p2b1/5N2/PP2PPPP/R1BQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Herzog defense *
+r2qkbnr/pp3ppp/2n5/2pp4/3P2b1/1QN2N2/PP2PPPP/R1B1KB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Reifir (Spielmann) variation *
+r2qkbnr/pp3ppp/2n5/2pp4/3P2b1/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, normal variation *
+r2qkbnr/pp3ppp/2n5/2pp4/Q2P2b1/2N2N2/PP2PPPP/R1B1KB1R b KQkq -
+Caro-Kann: Panov-Botvinnik, Czerniak variation *
+r2qkbnr/pp3ppp/2n5/2ppp3/6b1/3P1NP1/PPP1PPBP/RNBQK2R w KQkq -
+King's Indian: accelerated Averbakh system *
+r2qkbnr/pp3ppp/4p3/3p4/3Q4/6P1/PPb1PPBP/RNB2RK1 w kq -
+Gr\"unfeld: Gr\"unfeld gambit accepted *
+r2qkbnr/pp3ppp/8/3pn3/8/8/PPP1NPPP/RNBQK2R b KQkq -
+Bishop's opening: Lisitsyn variation
+r2qkbnr/pp4pp/2n1bp2/2p1p3/3pP3/2PP1NP1/PP3PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox, 7.d5 c6 *
+r2qkbnr/pp4pp/2n1bp2/2p1p3/3pP3/3P1NP1/PPP2PBP/RNBQ1RK1 w kq -
+King's Indian: S\"amisch, orthodox, 7.d5 *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, orthodox variation *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/8/1P1P1NP1/P1P1PPBP/RNBQ1RK1 b kq -
+King's Indian: S\"amisch, double fianchetto variation *
+r2qkbnr/pp4pp/2n1bp2/2ppp3/8/2NP1NP1/PPP1PPBP/R1BQ1RK1 b kq -
+King's Indian: S\"amisch, 6...Nc6 *
+r2qkbnr/ppp1p1pp/2n2p2/3p4/3P1Bb1/5N2/PPP1PPPP/RN1QKB1R w KQkq -
+Richter-Veresov attack, Richter variation *
+r2qkbnr/ppp1pppp/2n5/3p4/3P1B2/5b2/PPP1PPPP/RN1QKB1R w KQkq -
+Richter-Veresov attack, Veresov variation *
+r2qkbnr/ppp1pppp/2n5/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Richter-Veresov attack *
+r2qkbnr/ppp2p1p/2P5/8/2BP1pb1/2N2p2/PPP3PP/R1BQ1RK1 b kq -
+Vienna: Pierce gambit, Rushmere attack
+r2qkbnr/ppp2pp1/2n5/3p3p/2PPp1b1/4P3/PP1NBPPP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Breyer variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4P3/PPPNBPPP/RNBQ1RK1 b kq -
+French: Albin-Alekhine-Ch\^atard attack, Spielmann variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4P3/PPPNBPPP/RNBQK2R w KQkq -
+French: Albin-Alekhine-Ch\^atard attack *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/4PP2/PPPNB1PP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Teichmann variation *
+r2qkbnr/ppp2pp1/2n5/3p3p/3Pp1b1/P3P3/1PPNBPPP/RNBQK2R b KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Mar\'oczy variation *
+r2qkbnr/ppp2pp1/2n5/3pP2p/6b1/5NP1/PPPPP2P/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Alekhine variation *
+r2qkbnr/ppp2ppp/2n1b3/1B1p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Janowski variation *
+r2qkbnr/ppp2ppp/2n1b3/3p4/3Pp3/1P2P3/P1P1BPPP/RNBQK1NR b KQkq -
+French: classical, Frankfurt variation *
+r2qkbnr/ppp2ppp/2n1b3/3pp3/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+French: Henneberger variation *
+r2qkbnr/ppp2ppp/2n5/1B1p3b/3Pp3/4PN1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Bernstein variation *
+r2qkbnr/ppp2ppp/2n5/1B1p4/3P2b1/4Pp1P/PPP2PP1/RNBQK2R w KQkq -
+French: MacCutcheon, Chigorin variation *
+r2qkbnr/ppp2ppp/2n5/1B1p4/3Pp1b1/4PN2/PPP2PPP/RNBQK2R w KQkq -
+French: MacCutcheon, advance variation *
+r2qkbnr/ppp2ppp/2n5/1B1pp3/3P2b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+French: MacCutcheon variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3P2b1/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+French: exchange, Bogolyubov variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+French: exchange, Svenonius variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3Pp1b1/4P3/PPP1BPPP/RNBQK1NR b KQkq -
+French: classical, Vistaneckis (Nimzovich) variation *
+r2qkbnr/ppp2ppp/2n5/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R b KQkq -
+French: classical variation *
+r2qkbnr/ppp2ppp/2n5/3pN3/3Pp1b1/4P3/PPP1BPPP/RNBQK2R b KQkq -
+French: classical, Tartakower variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/1P3N2/P1PPP1PP/RNBQKB1R b KQkq -
+Dutch: Staunton gambit, Nimzovich variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/2P2N2/PP1PP1PP/RNBQKB1R b KQkq -
+Dutch: Staunton gambit, Chigorin variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+French: Burn variation *
+r2qkbnr/ppp2ppp/2n5/3pP3/6b1/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Staunton's line *
+r2qkbnr/ppp2ppp/2n5/3pp3/3P2b1/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+French: classical *
+r2qkbnr/ppp2ppp/2n5/3pp3/3P4/4Pb2/PPP1BPPP/RNBQK2R w KQkq -
+French: classical, Anderssen variation *
+r2qkbnr/ppp2ppp/2n5/3pp3/6b1/3P1NP1/PPP1PP1P/RNBQKB1R w KQkq -
+Pirc: Byrne variation *
+r2qkbnr/ppp2ppp/2npb3/4p3/2P5/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English, Tr\"oger defense
+r2qkbnr/ppp2ppp/8/3p4/1n1Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Alapin variation *
+r2qkbnr/ppp3pp/2n2p2/3pP3/6b1/5NP1/PPPPP2P/RNBQKB1R w KQkq -
+Dutch: Staunton gambit, Lasker variation *
+r2qkbnr/ppp3pp/2n5/3p1p2/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Steinitz variation *
+r2qkbnr/pppb1ppp/2B5/3p4/3Pp3/4PN1P/PPP2PP1/RNBQK2R b KQkq -
+French: MacCutcheon, Lasker variation *
+r2qkbnr/pppb1ppp/2n5/1B1p4/2PPp3/4P3/PP3PPP/RNBQK1NR w KQkq -
+French: Winawer, advance, Bogolyubov variation *
+r2qkbnr/pppb1ppp/2n5/1B1p4/3Pp3/4P2P/PPPN1PP1/RNBQK2R b KQkq -
+French: MacCutcheon, Tartakower variation *
+r2qkbnr/pppb1ppp/2n5/1B1pp3/3P4/4P3/PPP2PPP/RNBQK1NR w KQkq -
+French: Winawer, fingerslip variation *
+r2qkbnr/pppb1ppp/2n5/3pp3/Q3P3/2P2N2/PP1P1PPP/RNB1KB1R w KQkq -
+Ponziani: Caro variation
+r2qkbnr/pppb1ppp/2np4/1B2p3/2PPP3/5N2/PP3PPP/RNBQK2R b KQkq -
+Ruy Lopez: old Steinitz defense, semi-Duras variation
+r2qkbnr/pppb2pp/2npP3/1B3p2/3p4/5N2/PPP2PPP/RNBQK2R b KQkq -
+KGD: Falkbeer, Morphy gambit *
+r2qkbnr/pppnpppp/8/3p4/6b1/5NP1/PPPPPPBP/RNBQK2R w KQkq -
+R\'eti: King's Indian attack, Keres variation
+r2qr1k1/p1p2ppp/2p2n2/3pp1B1/1b2P1b1/3P1N2/PPP1QPPP/R2N1RK1 b - -
+Four knights: symmetrical, Capablanca variation *
+r2qr1k1/p1p2ppp/5n2/1p1P3b/Q5P1/2N1Bn1P/PPP1KP2/R4B1R w - -
+two knights defense: Yurdansky attack *
+r2qr1k1/ppp1bppp/2n2n2/4p3/2P3b1/2NPBN2/PP2BPPP/R2Q1RK1 w - -
+Philidor: Berger variation *
+r2r2k1/ppq2ppp/2n1pn2/2bp4/2P5/2N1PN1P/PP1BQPP1/R4RK1 b - -
+QGD: Lasker defense, Russian variation *
+r3k1nr/ppp1qppp/2n5/4P3/1bPp4/5N1P/PP1BPPP1/R2QKB1R w KQkq -
+QGD: Albin counter-gambit, Kr\'enosz variation
+r3k2r/p2q1ppp/5n2/3pp3/1b6/4P3/PP3PPP/RNBQ1RK1 w kq -
+QGD: Semi-Tarrasch, Kmoch variation *
+r3k2r/ppp1qppp/2n1b3/2bnp3/8/2NPPN2/PP2BPPP/R1BQK2R w KQkq -
+Sicilian: Velimirovi\'c attack *
+r3k2r/ppp2ppp/2n1bP2/2b2qN1/2ppN3/8/PPP2PPP/R1BQR1K1 b kq -
+two knights: Max Lange attack, Marshall variation
+r3k2r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP1BPPBP/R2Q1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, 9...Bd7 *
+r3k2r/pppq2pp/2n1bp2/2bnp3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w kq -
+Sicilian: dragon, Yugoslav attack, 9.Bc4 *
+r3k2r/pppq2pp/2n1bp2/2bnp3/P7/2NP1NP1/1P2PPBP/R1BQ1RK1 b kq -
+Sicilian: dragon, Yugoslav attack, Byrne variation *
+r3k2r/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQK2R w KQkq -
+Sicilian: dragon, classical, Amsterdam variation *
+r3k2r/ppq1ppbp/2N3p1/2pp4/6n1/1P2P3/PBPP1PPP/RN1Q1RK1 w kq -
+Bogo-Indian defense, Monticelli trap *
+r3kb1r/1b3ppp/p2ppn2/qpn1P1B1/3N4/1BN5/PPPQ1PPP/2KRR3 b kq -
+Sicilian: Najdorf, Ivkov variation
+r3kb1r/1bq2ppp/p3pn2/1p1P4/2p5/2N1PN2/PPQ2PPP/R1BR2K1 w kq -
+QGA: classical, Flohr variation
+r3kb1r/1pp2ppp/p1p1b3/3q4/3PN3/8/PPP2PPP/R1BQR1K1 w kq -
+Four knights: Spielmann variation
+r3kb1r/5ppp/b3pn2/1p1qN1B1/3p4/3B4/PP2QPPP/R4RK1 b kq -
+QGD semi-Slav: Meran, Rellstab attack
+r3kb1r/p4ppp/1qp1pn2/3p4/3P4/3Q3P/PPP2PP1/RNB2RK1 b kq -
+QGD: Lasker defense, Bernstein variation *
+r3kb1r/pp1Npppp/1qn2n2/1Bp5/2p5/2N1P3/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, Karlsbad variation *
+r3kb1r/pp1b1ppp/nq2pn2/3p4/3P1B2/4PN2/PP3PPP/RNQ1KB1R w KQkq -
+QGD Slav: Landau variation *
+r3kb1r/pp1bpppp/1qn2n2/1Bp5/2N5/2N1P3/PP1P1PPP/R1BQK2R b KQkq -
+Nimzo-Indian: Spielmann, San Remo variation *
+r3kb1r/pp1qn1pp/2n1bp2/2ppp3/8/P1NP1NP1/1PP1PPBP/1RBQ1RK1 b kq -
+King's Indian: S\"amisch, Panno main line *
+r3kb1r/pp1qpppp/2np1n2/2p5/3PP3/2P2N2/PP3PPP/RNBQ1RK1 b kq -
+Sicilian: Canal-Sokolsky attack, Bronstein gambit
+r3kb1r/pp2pppp/1qn2n2/2pp4/3P4/2P1PQ1P/PP3PP1/RNB1KB1R w KQkq -
+QGD/QGD semi-Slav: Hastings variation *
+r3kb1r/pp2pppp/2n2n2/2pq4/3P2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, Primitive Pillsbury variation *
+r3kb1r/pp2pppp/2n5/q1p5/1n1PP1b1/P4N2/1P3PPP/RNBQKB1R w KQkq -
+QGD: Semi-Tarrasch, Krause variation *
+r3kb1r/pp3ppp/1qn1bn2/3pp1B1/2P5/6P1/PP1NPPBP/RN1Q1RK1 b kq -
+Gr\"unfeld defense: Smyslov, Yugoslav variation *
+r3kb1r/pp3ppp/1qn1bn2/3pp1B1/8/6P1/PPPNPPBP/RN1Q1RK1 w kq -
+Gr\"unfeld defense: Smyslov, main line *
+r3kb1r/pp3ppp/1qn1pn2/1B1p1b2/3P1B2/2N1PN2/PP3PPP/R2QK2R b KQkq -
+QGD Slav: exchange, Trifunovi\'c variation *
+r3kb1r/pp3ppp/1qn1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Rauzer variation *
+r3kb1r/pp3ppp/2n2q2/2Pp4/1P2p1b1/2P1PN2/P2N1P2/R1BQKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Szab\'o variation *
+r3kb1r/ppp1q1pp/2n5/3n4/1P2p1b1/P3PN2/2Q2PPP/RNB1KB1R w KQkq -
+Sicilian: Najdorf, Polugayevsky, Simagin variation *
+r3kb1r/ppp2ppp/2n1bP2/5qN1/2ppN3/8/PPP2PPP/R1BQR1K1 w kq -
+two knights: Max Lange attack, Rubinstein variation
+r3kb1r/ppp2ppp/2nq4/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Keres variation *
+r3kb1r/ppp3pp/2n1bq2/3npp2/8/2NPPN2/PP2BPPP/R1BQK2R w KQkq -
+Sicilian: Scheveningen, Tal variation *
+r3kb1r/ppp3pp/2n2q2/3npp1b/6P1/P2PPN1P/1P2BP2/RNBQK2R b KQkq -
+Sicilian: Najdorf, G\"oteborg (Argentine) variation *
+r3kb1r/ppp3pp/2n2q2/3npp1b/8/P2PPN1P/1PQ1BPP1/RNB1K2R b KQkq -
+Sicilian: Najdorf, Browne variation *
+r3kb1r/ppp3pp/2n2q2/3npp2/6b1/P2PPN2/1PQ1BPPP/RNB1K2R b KQkq -
+Sicilian: Najdorf variation *
+r3kb1r/pppq1ppp/2n1b3/3np3/8/P2PPN2/1P3PPP/RNBQKB1R w KQkq -
+Sicilian: Scheveningen, English variation *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NP1N2/PP1BPPPP/R2QKB1R w KQkq -
+Sicilian: Richter-Rauzer, Larsen variation, 7.Qd2 *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NPPN2/PP2BPPP/R1BQK2R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...Be7 *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/2NPPN2/PP3PPP/R1BQKB1R w KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack *
+r3kb1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P3PPP/R1BQKB1R b KQkq -
+Sicilian: Richter-Rauzer, Rauzer attack, 7...a6 *
+r3kb1r/ppq2ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, Rubinstein variation *
+r3kb1r/ppq2ppp/2n1pn2/2ppN3/3P4/4P2P/PPP1QPP1/RNB2RK1 w kq -
+QGD: Lasker defense, Teichmann variation *
+r3kb1r/ppq2ppp/2n1pn2/3p4/2Pp2b1/4PN2/PP1NBPPP/R1BQ1RK1 w kq -
+QGD: Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein) *
+r3kb1r/ppqbpp1p/2n2np1/1Bp5/2N2P2/2N1P3/PP1P2PP/R1BQK2R w KQkq -
+Nimzo-Indian: Spielmann, St\aa hlberg variation *
+r3kb1r/ppqn1ppp/2n1p3/1Bpp3b/Q2P4/2P1PN2/PP1N1PPP/R1B2RK1 w kq -
+QGD: Cambridge Springs defense, Argentine variation *
+r3kb1r/ppqn1ppp/2n1p3/1Bpp4/Q2P2b1/2P1PN2/PP1N1PPP/R1B1K2R w KQkq -
+QGD: Cambridge Springs defense, Bogolyubov variation *
+r3kb1r/ppqn1ppp/2p2n2/4pb2/P1NP4/2N3P1/1P2PP1P/R1BQKB1R w KQkq -
+QGD Slav: Carlsbad variation
+r3kbnr/1ppb1ppp/p1p5/8/3NP3/8/PPP2PPP/RNB1K2R w KQkq -
+Ruy Lopez: exchange, Alekhine variation
+r3kbnr/p1pb1ppp/2p5/3pN1q1/3Pp3/4P1PP/PPP2P2/RNBQK2R b KQkq -
+French: MacCutcheon, Lasker variation, 8...g6 *
+r3kbnr/pp1qpppp/8/2ppP3/2P3b1/6P1/PP2PP1P/RNBQKB1R b KQkq -
+Gr\"unfeld: Lundin variation *
+r3kbnr/ppp2pp1/2n5/1B1p2qP/3P4/4P3/PPP2Pp1/RNBQK1R1 w Qkq -
+French: MacCutcheon, Grigoriev variation *
+r3kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPP1BPPP/RNBQK2R w KQkq -
+French: classical, Anderssen-Richter variation *
+r3kbnr/ppp2ppp/2n5/3p2q1/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Pollock variation *
+r3kbnr/pppq1ppp/2n1b3/3pp3/8/2PP1NP1/PP2PP1P/RNBQKB1R w KQkq -
+Pirc: 150 attack *
+r3kbnr/pppq1ppp/2n5/1B1p4/Q7/4PP2/PPP2P1P/RNB1K2R b KQkq -
+French: MacCutcheon, Bogolyubov variation *
+r3kbnr/pppq1ppp/2n5/3p4/3Pp3/4P3/PPPNQPPP/RNB1K2R w KQkq -
+French: classical, Rubinstein variation *
+r3kbnr/ppq1pppp/2n5/3p4/3P2b1/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+QGD: exchange, positional line, 6.Qc2 *
+r3qrk1/ppp1b1pp/2n1b3/3npp2/8/P1NPPN2/1PQ1BPPP/R1B2RK1 b - -
+Sicilian: Scheveningen, classical main line *
+r3r1k1/1p1n1p1p/1bpqb1p1/p2p2B1/1P1N3Q/P1PBR3/5PPP/5RK1 b - -
+Ruy Lopez: Marshall, main line, Spassky variation *
+r3r1k1/2qbbp1p/p2p1np1/npp1p3/3PP3/2P1NN1P/PPB2PP1/R1BQR1K1 w - -
+Ruy Lopez: closed, Chigorin, Yugoslav system
+r3r1k1/ppp1qppp/2n5/3b4/2P1p3/8/P1PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: Berlin defense, Rio de Janeiro variation *
+r4b1r/ppp1kp2/2n1bN1p/q5p1/1P1p3B/5N2/P1P2PPP/R2QR1K1 b - -
+two knights defense: Yurdansky attack
+r4rk1/2pqb1pp/p1n1p3/1p1pP3/4R3/1BP5/PP3PPP/RNBQ2K1 b - -
+Ruy Lopez: open, Tarrasch trap
+r4rk1/2pqbppp/p1n1b3/3pP3/2B1n3/5N2/PP2QPPP/RNBR2K1 w - -
+Ruy Lopez: open, Howell attack, Ekstr\"om variation
+r4rk1/p4ppp/bqn2n2/2b5/B3p3/2N3Q1/PPPPNPPP/R1B1K2R w KQ -
+Evans gambit: compromised defense, Paulsen variation *
+r4rk1/pbqnppbp/1p3np1/2pp4/P2P4/BPP1PN2/3NBPPP/R2Q1RK1 b - -
+Catalan: closed, Sokolsky variation *
+r4rk1/pp1bqpp1/2n1pn1p/2p5/2BP4/2N1PN2/PPQ2PPP/R2R2K1 w - -
+QGD: Lasker defense, Russian variation
+r4rk1/pp2ppbp/3p1np1/q4P2/4P1P1/2N1B3/PPP1Q2P/R4RK1 b - -
+Sicilian: dragon, classical, Stockholm attack
+r4rk1/pp2qppp/3b4/3P4/1P1Qn1b1/B3PN2/5PPP/R3KB1R w KQ -
+QGD semi-Slav: Meran, Rellstab attack *
+r4rk1/ppp1q2p/2n1b3/4p1p1/Q4p2/3P1NP1/PP2PPBP/R4RK1 w - -
+Sicilian: dragon, classical, Stockholm attack *
+r4rk1/ppp3pp/2n1bq2/4pP2/8/5Q2/PPPP1K1P/RNB2BNR w - -
+KGA: Lolli gambit, Young variation *
+r4rk1/pppqbppp/2n1b3/3np3/8/2NP1NP1/PP2PPBP/R1BQ1RK1 w - -
+Sicilian: dragon, classical, Richter variation *
+r4rk1/ppq1ppbp/2n2np1/2pp4/3P1Pb1/2P1PN2/PP2B1PP/RNB1QRK1 w - -
+Dutch: stonewall: Chekhover variation *
+r5nr/pp2k2p/2n2p2/2N1p2q/3pP3/3P2P1/PPP2PBP/RNB2RK1 b - -
+King's Indian: S\"amisch, orthodox, Bronstein variation *
+rn1q1rk1/1p3pbp/p2p1np1/2pP4/P3P1b1/2N2N2/1P2BPPP/R1BQ1RK1 w - -
+Benoni: classical with ...a6 and 10...Bg4
+rn1q1rk1/4ppbp/3p1np1/2pP4/4P3/2N2NP1/PP3PKP/R1BQ3R b - -
+Benk\"o gambit: main line
+rn1q1rk1/p3ppbp/bp3np1/2pp4/3P1P2/2P1PN2/PP2B1PP/RNBQ1RK1 w - -
+Dutch: stonewall with Ba3 *
+rn1q1rk1/pb1pbppp/1p2pn2/8/2PN4/1P1BP3/PB3PPP/RN1Q1RK1 b - -
+Queen's Indian: Averbakh variation
+rn1q1rk1/pb3ppp/1p1bp3/2pn4/8/1P2PN2/PB1PBPPP/RN1Q1RK1 w - -
+Queen's Indian: Averbakh variation *
+rn1q1rk1/pb3ppp/5n2/2b1p3/N2p4/1B1P4/PPP1NPPP/R1BQK2R b KQ -
+Evans gambit: Paulsen variation *
+rn1q1rk1/pb3ppp/5n2/2b1p3/N2p4/1B1P4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Ulvestad variation *
+rn1q1rk1/pb3ppp/8/1Bb5/4N1n1/5N2/PPPP1PPP/R1BQ1RK1 b - -
+Scotch gambit: Hanneken variation *
+rn1q1rk1/pbp1bppp/1p3n2/3pN1B1/3P4/2NBP3/PP3PPP/R2QK2R b KQ -
+QGD: Pillsbury attack
+rn1q1rk1/pbpp1ppp/1p2p3/6N1/2PP4/2n3P1/PPQ1PPBP/R3K2R b KQ -
+Bogo-Indian defense, Monticelli trap
+rn1q1rk1/pbppbppp/1p2p3/8/2PP4/2Q2NP1/PP2PPBP/R1B2RK1 b - -
+Queen's Indian: old main line, 9.Qxc3
+rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -
+Queen's Indian: Euwe variation
+rn1q1rk1/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Queen's Indian: old main line, 7.Nc3
+rn1q1rk1/pp1nppbp/6p1/2p5/3PP1b1/1QN1BN2/PP3PPP/R3KB1R w KQ -
+Gr\"unfeld defense: Smyslov, Yugoslav variation
+rn1q1rk1/pp2ppbp/2p2np1/3p1b2/2PP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Gr\"unfeld: Flohr defense
+rn1q1rk1/pp2ppbp/2p2np1/3p4/2PP2b1/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Gr\"unfeld: Smyslov defense
+rn1q1rk1/pp2ppbp/2pp1np1/5b2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Larsen system
+rn1q1rk1/pp2ppbp/4bnp1/2Pp4/2P2B2/2N1P3/PP3PPP/2RQKBNR w K -
+Gr\"unfeld: Gr\"unfeld gambit, Botvinnik variation
+rn1q1rk1/pp3ppp/2p1p3/5b2/PbBPn1P1/2N1PN2/1P2QP1P/R1B2RK1 b - -
+QGD Slav: Dutch, S\"amisch variation
+rn1q1rk1/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P2QPPP/R1B2RK1 b - -
+QGD Slav: Dutch variation, main line
+rn1q1rk1/ppp1b1pp/1n2pp2/4Pb2/2PP4/2N2N2/PP2B1PP/R1BQ1RK1 w - -
+Alekhine's defense: four pawns attack, Korchnoi variation
+rn1q1rk1/ppp1ppbp/5np1/8/2QPP1b1/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Smyslov variation
+rn1q1rk1/ppp2ppp/3b4/3p4/2PPn1b1/3B1N2/PP3PPP/RNBQ1RK1 w - -
+Petrov: classical attack, Tarrasch variation
+rn1q1rk1/ppp2ppp/8/2bNp3/4P1b1/3P1N2/PPP2PPP/R1BQK2R b KQ -
+Giuoco piano *
+rn1q1rk1/ppp2ppp/8/2bP1b2/4nPP1/5N2/PPP1Q2P/RNB1KB1R w KQ -
+KGD: Falkbeer, Tarrasch variation
+rn1q1rk1/ppp3pp/8/2bNpp1b/4P1P1/5N1P/PPPP1P2/R1BQK2R w KQ -
+Giuoco piano: Rosentreter variation *
+rn1q1rk1/ppp3pp/8/3P1p2/3Pn1b1/3B1N2/PP3PPb/RNBQR1K1 w - -
+Petrov: classical attack, Marshall trap
+rn1q1rk1/pppnppbp/6p1/8/3PP1b1/1QN1BN2/PP3PPP/R3KB1R b KQ -
+Gr\"unfeld defense: Smyslov, main line
+rn1qk1nr/pb3ppp/8/2b1p3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Danish gambit: Schlechter defense *
+rn1qk1nr/pb3ppp/8/2b1p3/8/8/PPPPQPPP/RNB1KBNR b KQkq -
+Danish gambit: Collijn defense *
+rn1qk1nr/pp1bppbp/6p1/2pp4/5P2/4PN2/PPPPB1PP/RNBQK2R b KQkq -
+Dutch-Indian, Alekhine variation *
+rn1qk1nr/pp3ppp/2pb4/3p1b2/3P4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Caro-Kann: exchange, Rubinstein variation *
+rn1qk1nr/ppp1ppbp/3p2p1/8/2PPP1b1/5N2/PP3PPP/RNBQKB1R w KQkq -
+Robatsch defense: Rossolimo variation
+rn1qk1nr/ppp2ppp/8/2b1p3/Q3P1b1/2P2N2/PP1P2PP/RNB1KB1R b KQkq -
+KGD: classical, Marshall attack
+rn1qk2r/1bpp1ppp/1p2pn2/p7/1bPP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -
+Queen's Indian: Yates variation
+rn1qk2r/p1pp1ppp/bp2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R w KQkq -
+Nimzo-Indian: 4.e3, Bronstein (Byrne) variation
+rn1qk2r/p4ppp/2p2n2/2bpp3/B3P1b1/2NP4/PPP2PPP/R1BQK1NR w KQkq -
+Evans gambit: Sokolsky variation *
+rn1qk2r/pb1pbppp/1p2pn2/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w kq -
+English: symmetrical, hedgehog system
+rn1qk2r/pbpp1pp1/1p2pn1p/8/1bPP3B/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+Queen's Indian: 4.Nc3, main line
+rn1qk2r/pbpp1ppp/1p2pn2/8/1bPP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Queen's Indian: Capablanca variation
+rn1qk2r/pbpp1ppp/5n2/1pb1p3/4P3/1BN5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, Cordel variation *
+rn1qk2r/pbppbppp/1p2p3/8/2PPn3/2N2NP1/PP1BPPBP/R2QK2R b KQkq -
+Queen's Indian: Opo\v censky variation
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/2N2NP1/PP2PPBP/R1BQK2R b KQkq -
+Queen's Indian: anti-Queen's Indian system
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP1BPPBP/RN1QK2R w KQkq -
+Queen's Indian: Riumin variation
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b kq -
+Queen's Indian: old main line, 6.O-O
+rn1qk2r/pbppbppp/1p2pn2/8/2PP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Queen's Indian: 5.Bg2 Be7
+rn1qk2r/pp1bppbp/5np1/1Bpp4/P7/1P2PN2/1BPP1PPP/RN1QK2R b KQkq -
+Queen's Indian: Yates variation *
+rn1qk2r/pp1bppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R b KQkq -
+Queen's Indian: Riumin variation *
+rn1qk2r/pp3ppp/2p1b3/3np3/1bB5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Paulsen attack *
+rn1qk2r/pp3ppp/2p1b3/3np3/1bB5/5Q2/PPPPNPPP/R1BNK2R b KQkq -
+Scotch: Paulsen, Gunsberg defense *
+rn1qk2r/pp3ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P3PPP/R1BQ1RK1 b kq -
+QGD Slav: Dutch variation
+rn1qk2r/pp3ppp/2p2n2/2bpp3/4P1b1/1BN5/PPPPQPPP/R1B1K1NR w KQkq -
+Giuoco Piano: Mestel variation *
+rn1qk2r/ppp2ppp/3pbn2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Ruy Lopez: Berlin defense, Kaufmann variation *
+rn1qk2r/ppp2ppp/8/2bP1b2/4nP2/5N2/PPP1Q1PP/RNB1KB1R w KQkq -
+KGD: Falkbeer, main line, 7...Bf5
+rn1qk2r/ppp3p1/8/2bpP1Pp/4b3/7P/PPP3K1/RNBQ1BNR w kq -
+KGA: Allgaier, Cook variation *
+rn1qk2r/pppbbppp/8/3pP3/N3n3/2PB1N1P/P1Q2PP1/R1B1K2R w KQkq -
+two knights defense: Knorre variation *
+rn1qkb1r/1b3ppp/p3pn2/1pp5/3P4/1B2PN2/PP2QPPP/RNB2RK1 w kq -
+QGA: classical, 8...Bb7
+rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N3P1/PP3P1P/R1BQ1KNR b kq -
+Benk\"o gambit
+rn1qkb1r/4pp1p/3p1np1/2pP4/4P3/2N5/PP2NPPP/R1BQ1K1R b kq -
+Benk\"o gambit: Ne2 variation
+rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+Benk\"o gambit: fianchetto variation
+rn1qkb1r/4pp1p/b2p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -
+Benk\"o gambit: Nd2 variation
+rn1qkb1r/4pppp/b2p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Benk\"o gambit: 7.e4
+rn1qkb1r/p1pp1ppp/bp2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq -
+Queen's Indian: Nimzovich variation (exaggerated fianchetto)
+rn1qkb1r/pb1p1ppp/1p2pn2/2p5/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+English: Wimpey system *
+rn1qkb1r/pb1p1ppp/1p3n2/2pp2N1/2P5/6P1/PP2PPBP/RNBQK2R b KQkq -
+Queen's Indian: B\"urger variation
+rn1qkb1r/pb1p1ppp/1p3n2/2pp4/2P4N/6P1/PP2PPBP/RNBQK2R b KQkq -
+Queen's Indian: Rubinstein variation
+rn1qkb1r/pb1ppppp/1p3n2/2p3B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: Capablanca's variation *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: New York (London) defensive system *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+English: Caro-Kann defensive system *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/2P2NP1/PP2PP1P/RNBQKB1R b KQkq -
+English: Bled variation *
+rn1qkb1r/pb1ppppp/1p3n2/2p5/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Queen's Indian: Marienbad system
+rn1qkb1r/pb1ppppp/1p3n2/8/2PQ4/5NP1/PP2PPBP/RNB1K2R b KQkq -
+Queen's Indian: Marienbad system, Berg variation
+rn1qkb1r/pbpp1p2/1p2p2p/6pn/2PP4/2N2NB1/PP2PPPP/R2QKB1R w KQkq -
+Queen's Indian: 4.Nc3, Botvinnik variation
+rn1qkb1r/pbpp1ppp/1p2pn2/8/2P1P3/2NB1N2/PP1P1PPP/R1BQK2R b KQkq -
+English: Queens Indian, Romanishin variation
+rn1qkb1r/pbpp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R w KQkq -
+Queen's Indian: 4.g3 Bb7
+rn1qkb1r/pp1bpppp/5n2/1Bpp4/8/4PN2/PPPPQPPP/RNB1K2R b KQkq -
+Bogo-Indian defense, Nimzovich variation *
+rn1qkb1r/pp1n1ppp/4p3/3pNb2/3P4/2N1P3/PP3PPP/R1BQKB1R w KQkq -
+QGD Slav: Amsterdam variation
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: New York (London) defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2P5/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -
+English: London defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p1b2/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGD Slav: 4.e3 Bf5
+rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: Capablanca's variation
+rn1qkb1r/pp2pppp/2p2n2/3p4/2P3b1/1P3NP1/P2PPP1P/RNBQKB1R w KQkq -
+English: Torre defensive system
+rn1qkb1r/pp2pppp/2p2n2/3p4/6b1/5NP1/PPPPPPBP/RNBQ1RK1 w kq -
+R\'eti: King's Indian attack, Yugoslav variation
+rn1qkb1r/pp2pppp/2p2n2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R b KQkq -
+QGD Slav: Krause attack
+rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N1PN2/1P3PPP/R1BQKB1R b KQkq -
+QGD Slav: Dutch variation
+rn1qkb1r/pp2pppp/2p2n2/5b2/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Czech defense
+rn1qkb1r/pp2pppp/2p2n2/8/P1pP2b1/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Steiner variation
+rn1qkb1r/pp2pppp/2pp4/3nP3/3P2b1/5N2/PPP1BPPP/RNBQK2R w KQkq -
+Alekhine's defense: modern, Flohr variation
+rn1qkb1r/pp2pppp/5n2/1Bpp4/3P2b1/4PN2/PPP2PPP/RNBQK2R b KQkq -
+QGD: Vienna variation *
+rn1qkb1r/pp2pppp/5n2/2p5/1PPp2b1/4PN2/P2P1PPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit, Dus-Chotimursky variation *
+rn1qkb1r/pp2pppp/5n2/2pp1b2/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: Miles variation *
+rn1qkb1r/pp2pppp/5n2/2pp4/3P2b1/4PN1P/PPP2PP1/RNBQKB1R b KQkq -
+QGD: Capablanca-Duras variation *
+rn1qkb1r/pp2pppp/5n2/2pp4/3P2b1/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+QGD *
+rn1qkb1r/pp2pppp/5n2/3p1b2/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: exchange variation
+rn1qkb1r/pp2pppp/5n2/8/1PPp2b1/5N1P/P2P1PP1/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit, Spielmann variation *
+rn1qkb1r/pp3ppp/2p1pn2/4Nb2/P1pP4/2N5/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Wiesbaden variation
+rn1qkb1r/pp3ppp/4b3/2pnp3/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 6.Be3 *
+rn1qkb1r/ppn2ppp/2p1b3/4p3/2B5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Meitner variation *
+rn1qkb1r/ppp1pppp/1n1p4/3PP3/2P3b1/5N2/PP3PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Vitolins attack
+rn1qkb1r/ppp1pppp/1n1p4/4Pb2/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, Trifunovi\'c variation
+rn1qkb1r/ppp1pppp/3p1n2/5b2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Old Indian: Janowski variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/2PP2b1/5N2/PP3PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Alekhine variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N1P/PPP2PP1/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Panov variation
+rn1qkb1r/ppp1pppp/3p4/3nP3/3P2b1/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern variation, 4...Bg4
+rn1qkb1r/ppp1pppp/4bn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Flohr variation
+rn1qkb1r/ppp1pppp/5B2/3p1b2/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -
+Richter-Veresov attack, Veresov variation
+rn1qkb1r/ppp1pppp/5n2/3p1b2/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's bishop game *
+rn1qkb1r/ppp1pppp/5n2/3p1b2/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: London system *
+rn1qkb1r/ppp1pppp/5n2/3p1bB1/3P4/2N2P2/PPP1P1PP/R2QKBNR b KQkq -
+Richter-Veresov attack, Richter variation
+rn1qkb1r/ppp1pppp/5n2/3p4/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Torre attack (Tartakower variation) *
+rn1qkb1r/ppp1pppp/5n2/3p4/6b1/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Torre attack *
+rn1qkb1r/ppp1pppp/5n2/3p4/6b1/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: Torre attack *
+rn1qkb1r/ppp1pppp/5n2/8/2pP2b1/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Janowsky-Larsen variation
+rn1qkb1r/ppp2ppp/4b3/4p3/1nB5/2N2Q2/PPPP1PPP/R1B1K1NR w KQkq -
+Scotch: Blumenfeld attack *
+rn1qkb1r/ppp2ppp/5n2/3pp3/2P3b1/4PN2/PP1P1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Torre attack, Wagner gambit *
+rn1qkb1r/ppp2ppp/8/3pP3/4n1b1/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq -
+Vienna gambit: Kaufmann variation
+rn1qkb1r/ppp3p1/8/3ppbPp/3Pn3/5N2/PPP2P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano defense *
+rn1qkb1r/pppb1ppp/8/1B2p2Q/1n6/2N5/PPPP1PPP/R1B1K1NR w KQkq -
+Scotch game *
+rn1qkbnr/1bpp1ppp/p7/1P6/3Q4/8/PP2PPPP/RNB1KBNR w KQkq -
+Sicilian: wing gambit, Marienbad variation *
+rn1qkbnr/1pp2ppp/p3p3/3P4/2B3b1/4PN2/PP3PPP/RNBQK2R b KQkq -
+QGA: Alekhine defense, Alatortsev variation
+rn1qkbnr/p1pppppp/bp6/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Guatemala defense
+rn1qkbnr/pp1b1ppp/4P3/1Bp5/4p3/8/PPP2PPP/RNBQK1NR b KQkq -
+QGD: Albin counter-gambit, Lasker trap *
+rn1qkbnr/pp1bpppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Sicilian: Canal-Sokolsky attack, 3...Bd7
+rn1qkbnr/pp2pppp/2p3b1/8/3P1P2/6N1/PPP3PP/R1BQKBNR b KQkq -
+Caro-Kann: classical, Mar\'oczy attack
+rn1qkbnr/pp2pppp/2p3b1/8/3P3P/6N1/PPP2PP1/R1BQKBNR b KQkq -
+Caro-Kann: classical, 6.h4
+rn1qkbnr/pp2pppp/2p3b1/8/3P4/6NN/PPP2PPP/R1BQKB1R b KQkq -
+Caro-Kann: classical, Flohr variation
+rn1qkbnr/pp2pppp/2p5/3p4/2P3b1/1P3N2/P2PPPPP/RNBQKB1R w KQkq -
+English: Caro-Kann defensive system, Bogolyubov variation
+rn1qkbnr/pp2pppp/2p5/3p4/4P1b1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Caro-Kann: two knights, 3...Bg4
+rn1qkbnr/pp2pppp/2p5/5b2/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: classical variation
+rn1qkbnr/pp2pppp/8/2p2bN1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Rubinstein variation *
+rn1qkbnr/pp2pppp/8/2pp4/6b1/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Neo-Indian (Seirawan) attack *
+rn1qkbnr/pp3ppp/2p1p3/3pPb2/3P4/2P5/PP2BPPP/RNBQK1NR b KQkq -
+Caro-Kann: advance, Short variation
+rn1qkbnr/pp4pp/4b3/2pp4/4p3/1NN5/PPP1PPPP/R1BQKB1R w KQkq -
+Alekhine's defense: four pawns attack, 7.Be3 *
+rn1qkbnr/ppp1pppp/3p4/8/3P2b1/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Old Indian: Tartakower (Wade) variation
+rn1qkbnr/ppp1pppp/3p4/8/4P1b1/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+R\'eti: Wade defense
+rn1qkbnr/ppp1pppp/4b3/8/2p5/4PN2/PP1P1PPP/RNBQKB1R w KQkq -
+R\'eti accepted: Keres variation
+rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn, Mason variation, Steinitz counter-gambit *
+rn1qkbnr/ppp1pppp/8/3p1b2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Grau (Sahovic) defense
+rn1qkbnr/ppp1pppp/8/3p1b2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn, Mason variation *
+rn1qkbnr/ppp1pppp/8/3p1b2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn: London system *
+rn1qkbnr/ppp1pppp/8/3p4/2P3b1/8/PP1PPPBP/RNBQK1NR b KQkq -
+Grob: Fritz gambit
+rn1qkbnr/ppp1pppp/8/3p4/3P2b1/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Queen's pawn: Anti-Veresov
+rn1qkbnr/ppp1pppp/8/3p4/3P2b1/8/PPP1PPPP/RNBQKBNR w KQkq -
+Levitsky attack (Queen's bishop attack) *
+rn1qkbnr/ppp1pppp/8/3p4/5Pb1/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, 2.Bg5 variation *
+rn1qkbnr/ppp1pppp/8/3p4/6b1/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Trompovsky attack (Ruth, Opo\v censk\'y opening) *
+rn1qkbnr/ppp1pppp/8/8/2Pp2b1/8/PP1PPPBP/RNBQK1NR w KQkq -
+Grob: Romford counter-gambit
+rn1qkbnr/ppp2ppp/2b1p3/8/3PN3/5N2/PPP2PPP/R1BQKB1R w KQkq -
+French: Fort Knox variation
+rn1qkbnr/ppp2ppp/3p4/4p3/2P3b1/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English, Smyslov defense
+rn1qkbnr/ppp2ppp/4b3/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Alapin variation *
+rn1qkbnr/ppp2ppp/8/3p4/5p2/6PB/PPPPP2P/RNBQK2R w KQkq -
+Amar gambit
+rn1qkbnr/pppb1ppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R w KQkq -
+Philidor: Boden variation
+rn2k2r/pbpp1ppp/8/2b1p3/Np2Q3/1B6/PPPP1qPP/R1BK2NR w kq -
+Evans gambit declined, Hicken variation *
+rn2k2r/pp4pp/1q3p2/1N1pN3/3Pn3/5K2/PPP3PP/R1BQ3R w kq -
+Giuoco Piano: Krause variation *
+rn2kb1r/pp1q1ppp/2p1b3/3np3/2B5/2N2Q2/PPPPNPPP/R1B1K2R w KQkq -
+Scotch: Blackburne attack *
+rn2kb1r/pp2pppp/2p2n2/q3Nb2/3P2P1/2N5/PPP2P1P/R1BQKB1R b KQkq -
+Scandinavian defense, Gr\"unfeld variation
+rn2kb1r/pp3ppp/2p1q3/1N6/3p4/5Q2/PP3PPP/1RB2RK1 b kq -
+Scotch: Gottschall variation *
+rn2kb1r/ppp1pppp/5n2/q4b2/3P4/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Scandinavian defense
+rn2kb1r/ppp1pppp/5n2/q7/3P2b1/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -
+Scandinavian defense, Lasker variation
+rn2kbnr/pp1b1ppp/1q2p3/2ppP3/3P4/2P2N2/PP3PPP/RNBQKB1R w KQkq -
+French: advance, Wade variation
+rn2kbnr/pp1qpppp/3p4/2p5/2P1P3/5N2/PP1P1PPP/RNBQK2R b KQkq -
+Sicilian: Canal-Sokolsky attack, Sokolsky variation
+rn2kbnr/ppp2ppp/8/q3p3/3P2b1/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Scandinavian: Anderssen counter-attack, Collijn variation
+rn3rk1/p1p1qpp1/1p2b2p/3p4/3P4/4PN2/PP3PPP/2RQKB1R w K -
+QGD: Tartakower variation
+rn3rk1/p4ppp/bqp5/2b1p3/N3n3/1B6/PPPQ1PPP/R1B1K1NR w KQ -
+Evans gambit: Levenfish variation *
+rnb1k1nr/p3qppp/2p1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Koomen variation
+rnb1k1nr/p4ppp/1qp1p3/1p6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Junge variation
+rnb1k1nr/pp1pq1pp/2p5/2b1pp2/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Bishop's opening: Lopez gambit *
+rnb1k1nr/pp2ppbp/3p2p1/q1p5/2PPP3/2N2N2/PP3PPP/R1BQKB1R w KQkq -
+Pterodactyl defense
+rnb1k1nr/pp2ppbp/6p1/2qp4/8/4PN2/PPPN1PPP/R1BQKB1R w KQkq -
+Catalan: open, 5.Qa4 Nbd7, 6.Qxc4 *
+rnb1k1nr/pp2ppbp/6p1/q1Pp4/8/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: open, 5.Qa4 *
+rnb1k1nr/pp3ppp/2p5/2PP4/2B4q/5p2/PPP2PPP/RNBQ1RK1 b kq -
+Bishop's opening: Pratt variation *
+rnb1k1nr/pp3ppp/4p3/2pq4/1b1P4/2NB4/PPPB1PPP/R2QK1NR b KQkq -
+French: Winawer, Kondratiyev variation
+rnb1k1nr/ppp2pbp/3p4/4P1p1/2BP1p1q/2N5/PPP3PP/R1BQ1KNR b kq -
+KGA: bishop's gambit, Grimm attack
+rnb1k1nr/ppp2ppp/3b4/3B4/4Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Bor\'en-Svenonius variation
+rnb1k1nr/pppp1pbp/8/6p1/2B1P2q/2N2Qp1/PPPP3P/R1B2KNR b kq -
+KGA: bishop's gambit, Fraser variation
+rnb1k1nr/pppp1pbp/8/6p1/2B1Pp1q/2N3P1/PPPP3P/R1BQ1KNR b kq -
+KGA: bishop's gambit, McDonnell attack
+rnb1k1nr/pppp1ppp/8/2b1p1q1/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -
+Bishop's opening: del Rio variation
+rnb1k1nr/pppp1ppp/8/2b5/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Greco variation
+rnb1k1nr/pppp1ppp/8/4p3/1bB1Pq2/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+KGD: Norwalde variation, B\"ucker gambit
+rnb1k1nr/ppppqppp/1b1P4/4p3/2B1P3/2P2N2/PP3PPP/RNBQK2R b KQkq -
+Giuoco Piano: Eisinger variation
+rnb1k1nr/pppq1ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer, Petrosian variation
+rnb1k1nr/ppq1ppbp/6p1/3p4/8/P3PN2/1PPN1PPP/R1BQKB1R w KQkq -
+Catalan: open, Alekhine variation *
+rnb1k1nr/ppq2ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq -
+French: Winawer, classical variation
+rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P1NPPP/R1B1KB1R b KQq -
+French: Winawer, advance, poisoned pawn, Konstantinopolsky variation
+rnb1k1r1/ppq1np1Q/4p3/3pP3/3p4/P1P5/2P2PPP/R1BK1BNR b q -
+French: Winawer, advance, poisoned pawn, Euwe-Gligori\'c variation
+rnb1k2r/1pq1bpp1/p2ppn1p/8/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf, Browne variation
+rnb1k2r/1pq1bppp/p2ppn2/6B1/3NPP2/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf variation
+rnb1k2r/2q1bp1p/p2p1n2/1ppPp1p1/4P3/2P2N1P/PPBN1PP1/R1BQR1K1 w kq -
+Ruy Lopez: closed, Leonhardt variation
+rnb1k2r/p1pp1ppp/8/4p3/Np2n1Qq/1B6/PPPPKbPP/R1B3NR w kq -
+Evans gambit declined, V\'asquez variation *
+rnb1k2r/p4ppp/1qp2n2/2bpp3/B3P3/2NP4/PPP2PPP/R1BQK1NR w KQkq -
+Evans gambit: Tartakower attack *
+rnb1k2r/pp2ppbp/5np1/2pq4/8/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+Queen's Indian: Marienbad system, Berg variation *
+rnb1k2r/pp2qppp/1bp2n2/3pp1B1/1P2P3/P1NP1N2/2P1BPPP/R2QK2R b KQkq -
+Ruy Lopez: Wormald attack, Gr\"unfeld variation *
+rnb1k2r/pp3ppp/4p3/q7/1b1PP3/5N2/P2B1PPP/R2QKB1R w KQkq -
+QGD: Semi-Tarrasch, San Sebastian variation
+rnb1k2r/ppp1qppp/5n2/2p1P3/3p4/5N1P/PPP1BPP1/R1BQK2R b KQkq -
+two knights defense: Mar\'oczy variation *
+rnb1k2r/ppp1qppp/5n2/3P4/1bBp4/2P2N2/PP3PPP/RNBQK2R w KQkq -
+Bishop's opening: Urusov gambit, Panov variation
+rnb1k2r/ppp2p1p/4pp2/q7/1b1P4/2N5/PPPQ1PPP/R3KBNR w KQkq -
+French: MacCutcheon, Bogolyubov variation
+rnb1k2r/ppp2p1p/5n2/3qN3/1b1P1ppP/2N5/PPP2KP1/R1BQ1B1R b kq -
+KGA: Kieseritsky, Brentano defense, Kaplanek variation
+rnb1k2r/ppp2ppp/1b6/3qp3/1PP5/P2P4/5PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Noah's ark trap *
+rnb1k2r/ppp2ppp/3b4/3qp3/8/3P4/PPP2PPP/R1BQKBNR w KQkq -
+Scotch: Ghulam Kassim variation *
+rnb1k2r/ppp2ppp/5n2/3qp3/1b6/2NP4/PP1QPPPP/R1B1KBNR b KQkq -
+Sicilian: Chekhover, Zaitsev variation *
+rnb1k2r/ppp2ppp/8/2bPp3/2B3nq/2N4N/PPPP1PPP/R1BQK2R w KQkq -
+Scotch gambit: Vitzhum attack *
+rnb1k2r/ppp2ppp/8/3Pp3/2qP4/2N3P1/PPP2K1P/R1BQ3R b kq -
+Scotch gambit: Cochrane-Shumov defense *
+rnb1k2r/ppp2ppp/8/3np3/8/P1P5/1PPB1PPP/R3KBNR b KQkq -
+Ruy Lopez: exchange, Alekhine variation *
+rnb1k2r/ppp2ppp/8/3q4/4nP2/8/PPPNQbPP/RNBK1B1R b kq -
+KGD: Falkbeer, Alapin variation
+rnb1k2r/ppp3p1/3q1n2/2bppP1p/6P1/3P3P/PPP2PB1/RNBQK1NR w KQkq -
+KGA: Philidor gambit, Schultz variation *
+rnb1k2r/pppnqppp/4p3/1N1pP3/3P4/8/PPP2PPP/R2QKBNR b KQkq -
+French: classical, Alapin variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P1P2/2N5/PPP3PP/R2QKBNR b KQkq -
+French: classical, Steinitz variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq -
+French: classical, Pollock variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2N5/PPPQ1PPP/R3KBNR b KQkq -
+French: classical, Rubinstein variation
+rnb1k2r/pppnqppp/4p3/3pP3/3P4/2NB4/PPP2PPP/R2QK1NR b KQkq -
+French: classical, Tarrasch variation
+rnb1k2r/pppnqppp/8/2p1P3/2Bp4/5N1P/PPP2PP1/R1BQK2R w KQkq -
+two knights defense: Yankovich variation *
+rnb1k2r/pppp1ppp/3b1q2/8/N3P1n1/2P2N2/P1Q2PPP/R1B1KB1R w KQkq -
+two knights defense: Paoli variation *
+rnb1k2r/pppp1ppp/5q2/8/NP2P1n1/5N2/P4PPP/R1BQKB1R b KQkq -
+two knights defense: Blackburne variation *
+rnb1k2r/pppp1ppp/5q2/8/Nb2P1n1/2P2N2/P4PPP/1RBQKB1R b Kkq -
+two knights defense: Colman variation *
+rnb1k2r/pppp1ppp/5q2/8/Nb2P1n1/2P2N2/P4PPP/R1BQKB1R w KQkq -
+two knights defense: Bogolyubov variation *
+rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N3P1/PPP4P/R1BQ1KNR b kq -
+KGA: bishop's gambit, McDonnell attack
+rnb1k2r/ppppnpbp/8/6p1/2BPPp1q/2N5/PPP3PP/R1BQ1KNR w kq -
+KGA: bishop's gambit, classical defense
+rnb1k2r/ppppqppp/4pn2/8/1bPP4/5N2/PP1BPPPP/RN1QKB1R w KQkq -
+Bogo-Indian defense, Nimzovich variation
+rnb1k2r/ppppqppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Wormald (Alapin) attack *
+rnb1kb1N/ppp3pp/5n2/3p4/2B1p3/8/PPPP1PqP/RNBQKR2 w Qkq -
+Latvian: Behting variation
+rnb1kb1r/1p3ppp/p2ppn2/6B1/3NPP2/q1N5/P1PQ2PP/1R2KB1R w Kkq -
+Sicilian: Najdorf, Poisoned pawn variation
+rnb1kb1r/1p3ppp/pq1ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 7...Qb6
+rnb1kb1r/1pq2ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQ1RK1 w kq -
+Sicilian: Scheveningen (Paulsen), classical variation
+rnb1kb1r/2q2ppp/p3pn2/1p2P1B1/3N4/2N5/PPP1Q1PP/R3KB1R b KQkq -
+Sicilian: Najdorf, Polugayevsky, Simagin variation
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Ponziani: Leonhardt variation *
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+Ponziani: Steinitz variation *
+rnb1kb1r/pp1p1ppp/2p2n2/q3p3/3PP3/2N5/PPPB1PPP/R2QKBNR b KQkq -
+Ponziani: Caro variation *
+rnb1kb1r/pp1p2pp/2p2n2/q3p1B1/2B1P3/8/PPP2PPP/RN1QK1NR w KQkq -
+KGD: classical, Marshall attack *
+rnb1kb1r/pp1ppppp/5n2/q1pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Woozle defense
+rnb1kb1r/pp2pppp/1qp2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav: S\"uchting variation
+rnb1kb1r/pp2pppp/5n2/q1Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA: Mannheim variation *
+rnb1kb1r/pp3pp1/2p1pq1p/3p4/2PP4/1QN2N2/PP2PPPP/R3KB1R b KQkq -
+QGD/QGD semi-Slav: Hastings variation
+rnb1kb1r/pp3ppp/1q2pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: Canal (Venice) variation
+rnb1kb1r/ppp1pppp/5n2/8/3q4/2N2N2/PPPPQ1PP/R1B1KB1R b KQkq -
+Queen's pawn: Englund gambit *
+rnb1kb1r/ppp1q1pp/5n2/4Np2/2Bp1B2/8/PPP2PPP/RN1QK2R b KQkq -
+KGD: Falkbeer, main line, 7...Bf5 *
+rnb1kb1r/ppp1q2p/5n2/4Npp1/2Bp1B2/8/PPP2PPP/RN1Q1RK1 b kq -
+KGD: Falkbeer, Tarrasch variation *
+rnb1kb1r/ppp1qppp/5n2/3PN3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, Steinitz variation *
+rnb1kb1r/ppp1qppp/8/3n4/2N1p3/2N5/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov: modern attack, Bardeleben variation *
+rnb1kb1r/ppp2p1p/3p3n/4N3/2BPPppq/8/PPP3PP/RNBQ1K1R w kq -
+KGA: Salvio gambit, Anderssen counter-attack
+rnb1kb1r/ppp2ppp/5n2/3qN3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, main line *
+rnb1kb1r/ppp2ppp/5n2/3qp3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian, Chekhover variation *
+rnb1kb1r/ppp2ppp/5n2/3qp3/8/3P4/PPPB1PPP/RN1QKBNR b KQkq -
+Philidor: Boden variation *
+rnb1kb1r/ppp2ppp/5n2/4N3/3qp3/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Rellstab variation *
+rnb1kb1r/ppp2ppp/8/3NP2q/8/3P1Nn1/PPP4P/R1BQKB1R b KQkq -
+Vienna gambit, Wurzburger trap
+rnb1kb1r/ppp3pp/8/3q1p2/4nPP1/8/PPPNQ2P/R1B1KBNR b KQkq -
+KGD: Falkbeer, Charousek variation
+rnb1kb1r/pppp1p1p/7n/4N3/2BPP1pq/5p2/PPP3PP/RNBQ1K1R w kq -
+KGA: Silberschmidt gambit
+rnb1kb1r/pppp2p1/8/4pq1p/8/3B1N1P/PPPP1K2/RNBQ3R b kq -
+KGA: Allgaier, Horny defense *
+rnb1kb1r/ppppqppp/5n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Cozio (Lasker) attack *
+rnb1kb1r/ppq1p1pp/2pp1n2/5p2/2PP4/2N3P1/PP2PPBP/R1BQK1NR w KQkq -
+Dutch: Hort-Antoshin system
+rnb1kbnr/p1pp1ppp/8/1p6/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, Bryan counter-gambit
+rnb1kbnr/pp1ppppp/8/q1p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Stiletto (Althouse) variation
+rnb1kbnr/pp2pppp/1qp5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+Caro-Kann: Edinburgh variation
+rnb1kbnr/pp2pppp/8/3q4/1p6/P7/1BPP1PPP/RN1QKBNR b KQkq -
+Sicilian: wing gambit, Marienbad variation
+rnb1kbnr/pp3ppp/2p1q3/4p3/8/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Center game: Charousek variation *
+rnb1kbnr/ppp1pp1p/3q4/3p2p1/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch, Von Pretzel gambit *
+rnb1kbnr/ppp1pppp/3q4/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Manhattan (Alapin, Ulvestad) variation *
+rnb1kbnr/ppp1pppp/3q4/8/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scandinavian: Pytel-Wade variation
+rnb1kbnr/ppp1pppp/8/q7/1P6/2N5/P1PP1PPP/R1BQKBNR b KQkq -
+Scandinavian, Mieses-Kotr\v c gambit
+rnb1kbnr/ppp1q1pp/3p4/4Pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, R\'eti variation *
+rnb1kbnr/ppp1q1pp/8/4Np2/3p4/8/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, Charousek gambit *
+rnb1kbnr/ppp2p1p/8/3B2p1/4Pp1q/6P1/PPPP3P/RNBQ1KNR b kq -
+KGA: bishop's gambit, Chigorin's attack (Gifford variation)
+rnb1kbnr/ppp2ppp/4p3/3q4/3PN3/8/PPP2PPP/R1BQKBNR w KQkq -
+French: Frere (Becker) variation
+rnb1kbnr/ppp2ppp/4q3/4p3/5P2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Center game: l'Hermet variation *
+rnb1kbnr/ppp2ppp/4q3/4p3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Center game: Berger variation *
+rnb1kbnr/ppp2ppp/4q3/4p3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Center game: Paulsen attack *
+rnb1kbnr/ppp2ppp/8/2q1p3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Center game: Hall variation *
+rnb1kbnr/ppp2ppp/8/3p2q1/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Nimzovich variation *
+rnb1kbnr/ppp2ppp/8/3qp3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Center game *
+rnb1kbnr/ppp2ppp/8/3qp3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Center game *
+rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Scandinavian: Anderssen counter-attack, Goteborg system
+rnb1kbnr/ppp2ppp/8/q3p3/3P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Scandinavian: Anderssen counter-attack
+rnb1kbnr/ppp3pp/3p1q2/8/3Pp3/4N3/PPP2PPP/RNBQKB1R b KQkq -
+Latvian: Nimzovich variation
+rnb1kbnr/pppp1B1p/8/4q3/5p2/5Q2/PPPP2PP/RNB2RK1 b kq -
+KGA: double Muzio gambit
+rnb1kbnr/pppp1p1p/8/4N3/2B1P1pq/5p2/PPPP2PP/RNBQ1K1R w kq -
+KGA: Cochrane gambit
+rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/5Q2/PPPP2PP/RNB2KNR b kq -
+KGA: bishop's gambit, classical defense, Cozio attack
+rnb1kbnr/pppp1p1p/8/6p1/2B1Pp1q/8/PPPP2PP/RNBQ1KNR w kq -
+KGA: bishop's gambit, classical defense
+rnb1kbnr/pppp1ppp/5q2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Greco defense
+rnb1kbnr/pppp1ppp/5q2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Napoleon's opening *
+rnb1kbnr/pppp1ppp/5q2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Norwalde variation
+rnb1kbnr/pppp1ppp/8/4p3/4P2q/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Patzer opening *
+rnb1kbnr/pppp2pp/5q2/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Breyer gambit *
+rnb1kbnr/ppppq1pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Carrera (Basman) gambit *
+rnb1kbnr/ppppq2p/8/4Np2/2BPPppP/8/PPP3P1/RNBQK2R b KQkq -
+KGA: Kieseritsky, Salvio defense, Cozio variation
+rnb1kbnr/ppppqp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Salvio (Rosenthal) defense
+rnb1kbnr/ppppqp1p/8/8/2B1Pp2/5Q2/PPPP2PP/RNB2RK1 w kq -
+KGA: Muzio gambit, From defense
+rnb1kbnr/ppppqp1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -
+KGA: Muzio gambit, Kling and Horwitz counter-attack
+rnb1kbnr/ppppqppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Gunderam defense
+rnb1kbnr/ppppqppp/8/4p3/4PP2/6P1/PPPP3P/RNBQKBNR w KQkq -
+KGD: Keene's defense
+rnb1kbnr/ppppqppp/8/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Chigorin variation *
+rnb1kbnr/ppppqppp/8/8/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -
+Danish gambit: Collijn defense
+rnb1kbnr/ppq1pppp/8/2p1N3/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Fajarowicz, Steiner variation *
+rnb1kbnr/ppq1pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+Queen's pawn: Mengarini attack *
+rnb1kbnr/ppqppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Quinteros variation
+rnb1qrk1/pp2b1pp/2p1pn2/3p1pB1/2PP4/2N2NP1/PPQ1PPBP/R4RK1 b - -
+Dutch: stonewall: Chekhover variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/1PN2NP1/P3PPBP/R1BQ1RK1 b - -
+Dutch: Ilyin-Genevsky variation with b3
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Ilyin-Genevsky variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PP2PPBP/R1BQR1K1 b - -
+Dutch: Ilyin-Genevsky, Winter variation
+rnb1qrk1/ppp1b1pp/3ppn2/5p2/2PP4/2N2NP1/PPQ1PPBP/R1B2RK1 b - -
+Dutch: Ilyin-Genevsky variation with Qc2
+rnb1r1k1/ppp2ppp/1b6/3qp3/1PP5/P2P1N2/4BPPP/R1BQK2R b KQ -
+Ruy Lopez: Noah's ark trap *
+rnb2bnr/pppp1k1p/5q2/8/4Pp2/2N1BQ2/PPP3PP/R4RK1 b - -
+KGA: Lolli gambit, Young variation
+rnb2knr/pppp2pp/5q2/2b1pP1Q/6P1/8/PPPP1P1P/RNB1KBNR w KQ -
+KGA: bishop's gambit, classical defense, Cozio attack *
+rnb2rk1/p1p1qppp/1p3n2/8/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Pillsbury variation *
+rnb2rk1/p1pqppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQ1RK1 w - -
+Gr\"unfeld: exchange, Larsen variation
+rnb2rk1/p1q1ppbp/1p3np1/2pp4/3P4/2P1PN2/PP1NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Qc2 & b3 *
+rnb2rk1/p4ppp/1qp2n2/2bPp3/B7/2NP4/PPP2PPP/R1BQK1NR w KQ -
+Evans gambit: Waller attack *
+rnb2rk1/pp2ppbp/2pp1np1/q7/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+King's Indian: fianchetto, Kavalek (Bronstein) variation
+rnb2rk1/pp2qppp/1b2pn2/3p4/1PP5/P3PN2/1B3PPP/RN1QKB1R b KQ -
+QGA: classical, 8...Bb7 *
+rnb2rk1/pp2qppp/1b3n2/2p1N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R w KQ -
+Ruy Lopez: open, Howell attack, Adam variation *
+rnb2rk1/pp2qppp/4pn2/2bp4/1PP5/P3PN2/5PPP/RNBQKB1R b KQ -
+QGA: classical, 7...b5 *
+rnb2rk1/pp2qppp/4pn2/2bp4/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, 7.Qe2 *
+rnb2rk1/pp2qppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Gligori\'c system, Smyslov variation
+rnb2rk1/pp2qppp/5n2/2b5/1PB1p3/P1N1PN2/5PPP/R1BQK2R w KQ -
+QGA: classical, Furman variation *
+rnb2rk1/pp2qppp/5n2/2p5/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Zukertort variation *
+rnb2rk1/pp3ppp/1bpq1n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R w KQ -
+Ruy Lopez: open, Motzko attack *
+rnb2rk1/pp3ppp/1bpq1n2/4N3/1PBPp3/P3B3/2P1NPPP/R2QK2R b KQ -
+Ruy Lopez: open, Motzko attack, Nenarokov variation *
+rnb2rk1/ppB1ppbp/6p1/3q4/3P4/4P3/PP3PPP/R2QKBNR b KQ -
+Gr\"unfeld: Gr\"unfeld gambit accepted
+rnb2rk1/ppp1qpp1/4p2p/3P4/3P4/2P1PN2/P4PPP/R2QKB1R b KQ -
+QGD: Lasker defense, main line
+rnb2rk1/ppp1qpp1/4p2p/3p4/2PPn3/2N1PN2/PPQ2PPP/R3KB1R b KQ -
+QGD: Lasker defense, Teichmann variation
+rnb2rk1/ppp1qppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, Howell attack *
+rnb2rk1/ppp1qppp/5n2/3pN3/1b1PP3/2N5/PPP1BPPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Trifunovi\'c variation *
+rnb2rk1/ppp1qppp/5n2/8/4pN2/2P5/P1PPBPPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Cordel variation *
+rnb2rk1/ppp1qppp/8/3n4/4p3/2P5/PNPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Winawer attack *
+rnb2rk1/ppp2pbp/3p2p1/3Pp3/2n1P2Q/2N2P2/PP2K2P/R5NR w - -
+King's Indian: S\"amisch, orthodox, Bronstein variation
+rnb2rk1/ppp2pp1/3q3p/3p4/3P4/1QP1PN2/P4PPP/R3KB1R w KQ -
+QGD: Lasker defense, Bernstein variation
+rnb2rk1/pppp2pp/5q2/2b1pP2/8/2N5/PPPP1P1P/R1BQKBNR b KQ -
+KGA: Muzio gambit, Holloway defense *
+rnb2rk1/pppp2pp/5q2/2b1pP2/8/8/PPPPQP1P/RNB1KBNR b KQ -
+KGA: Muzio gambit, From defense *
+rnb2rk1/pppp2pp/5q2/5P2/4Q3/8/PPPP1b1P/RNB1KBNR w KQ -
+KGA: double Muzio gambit *
+rnb2rk1/ppppqppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: Worrall attack, sharp line *
+rnb2rk1/ppppqppp/1b3n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQK2R b KQ -
+Ruy Lopez: Worrall attack, solid line *
+rnb2rk1/ppppqppp/5n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Tartakower variation *
+rnb2rk1/ppppqppp/5n2/b3p3/4P3/P1N2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Worrall attack *
+rnb2rk1/ppq1ppbp/5np1/2pp4/3P4/4PN2/PPPNBPPP/R1BQ1RK1 w - -
+Catalan: closed, 7.Qc2 *
+rnbk1b1r/pppnqBpp/8/4Np2/3Q4/8/PPP2PPP/RNB1K2R w KQ -
+KGD: Falkbeer, Alapin variation *
+rnbk1bnr/pppp2pp/8/8/2B1pp1q/2N5/PPPPQ1PP/R1BK2NR w - -
+KGA: L\'opez-Gianutio counter-gambit, Hein variation
+rnbq1bnr/ppp3k1/7p/3B4/3PPppP/8/PPP3P1/RNBQK2R b KQ -
+KGA: Allgaier, Urusov attack
+rnbq1bnr/ppp3k1/7p/4B3/2BPp1pP/8/PPP3P1/RN1QK2R b KQ -
+KGA: Allgaier, Cook variation
+rnbq1bnr/pppp1k2/7p/8/2B1PppP/8/PPPP2P1/RNBQK2R b KQ -
+KGA: Allgaier, Walker attack
+rnbq1bnr/pppp1k2/7p/8/3PPppP/8/PPP3P1/RNBQKB1R b KQ -
+KGA: Allgaier, Thorold variation
+rnbq1bnr/pppp1k2/7p/8/4PppP/2N5/PPPP2P1/R1BQKB1R b KQ -
+KGA: Allgaier, Blackburne gambit
+rnbq1bnr/pppp1kpp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQ -
+KGA: Tumbleweed gambit *
+rnbq1bnr/pppppkpp/5p2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQ -
+Fried fox defense
+rnbq1bnr/pppppkpp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQ -
+Hammerschlag (Fried fox/Pork chop opening) *
+rnbq1k1r/pp3ppp/5n2/1Bbpp3/8/2N2N2/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Cracow variation *
+rnbq1k1r/ppp2Bpp/8/4N2Q/1b1Pp3/2n5/PPP2PPP/R1B1K2R b KQ -
+Two knights defense, Keidanz variation *
+rnbq1k1r/ppp2pp1/4p2p/3pP3/3Pn1Q1/2P5/P1P2PPP/R1B1KBNR b KQ -
+French: MacCutcheon, Duras variation
+rnbq1k1r/ppp3pp/5P2/2bpp1PQ/4n3/7N/PPPP1P1P/RNB1KB1R b KQ -
+KGA: Silberschmidt gambit *
+rnbq1k1r/ppp3pp/8/2bppPPQ/4n3/3P3N/PPP2P1P/RNB1KB1R b KQ -
+KGA: Salvio gambit, Anderssen counter-attack *
+rnbq1k1r/pppp2pp/5P2/2b1p1PQ/4n3/8/PPPP1P1P/RNB1KBNR b KQ -
+KGA: Cochrane gambit *
+rnbq1k1r/pppp2pp/8/2b1pPPQ/4n3/2N5/PPPP1P1P/R1B1KBNR b KQ -
+KGA: Herzfeld gambit *
+rnbq1knr/pppp2pp/8/2b1pP1Q/1P6/8/P1PP1PPP/RNB1KBNR b KQ -
+KGA: bishop's gambit, Bryan counter-gambit *
+rnbq1knr/pppp2pp/8/2b1pP1Q/2B5/8/PPPP1PPP/RNB1K1NR b KQ -
+KGA: bishop's gambit, Greco variation *
+rnbq1knr/pppp2pp/8/2b1pP1Q/6P1/8/PPPP1P1P/RNB1KBNR b KQ -
+KGA: bishop's gambit, classical defense *
+rnbq1knr/pppp2pp/8/2b1pP1Q/8/2N5/PPPP1PPP/R1B1KBNR b KQ -
+KGA: bishop's gambit, Boden defense *
+rnbq1knr/pppp2pp/8/4pP1Q/3b4/3B4/PPP2PPP/RNB1K1NR b KQ -
+KGA: bishop's gambit, Bor\'en-Svenonius variation *
+rnbq1knr/pppp3p/6p1/4pP1Q/3b2P1/8/PPP2P1P/RNB1KBNR w KQ -
+KGA: bishop's gambit, Chigorin's attack (Gifford variation) *
+rnbq1r1k/p1p4P/5n2/2bpp2B/8/8/PPPP1PPP/RNBQK1NR w KQ -
+Bishop's opening: Four pawns' gambit *
+rnbq1r1k/pppp3P/5n2/2b1p2B/8/8/PPPP1PPP/RNBQK1NR w KQ -
+KGA: Cunningham, three pawns gambit *
+rnbq1rk1/1p2ppbp/p1pp1np1/8/2PPP3/2NBBP2/PP4PP/R2QK1NR w KQ -
+King's Indian: S\"amisch, Byrne variation
+rnbq1rk1/1p3pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 b - -
+Benoni: classical, 9...a6, 10.a4
+rnbq1rk1/1p3ppp/4pn2/p1bp4/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, Rubinstein variation *
+rnbq1rk1/1pp1ppbp/p4np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Alekhine (Hungarian) variation
+rnbq1rk1/1pp2pbp/3p1np1/p2Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: Petrosian system, Stein variation
+rnbq1rk1/1pp2ppp/1b3n2/p2NN3/1P1PP3/P7/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Schlechter defense *
+rnbq1rk1/1ppp1ppp/1b3n2/p3p3/1P2P3/P1N2N2/2PPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Wing attack *
+rnbq1rk1/2p1bppp/p2p1n2/1p2p3/3PP3/1BP2N1P/PP3PP1/RNBQR1K1 b - -
+Ruy Lopez: closed, Breyer, 10.d4
+rnbq1rk1/2p1bppp/p2p1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+Ruy Lopez: closed, Breyer defense
+rnbq1rk1/p1p1bpp1/1p2p2p/3n4/3P3B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5
+rnbq1rk1/p1p1bpp1/1p2pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Tartakower (Makagonov-Bondarevsky) system
+rnbq1rk1/p1p1ppbp/1p1p1np1/8/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, double fianchetto variation
+rnbq1rk1/p1p1ppbp/1p3np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Levenfish variation
+rnbq1rk1/p1p1ppbp/1p4p1/8/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Simagin's lesser variation
+rnbq1rk1/p1p2ppp/1p2pn2/3p4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -
+Nimzo-Indian: 4.e3, main line with ...b6
+rnbq1rk1/p1pp1ppp/4pn2/1p6/2PP4/P1Q5/1P2PPPP/R1B1KBNR w KQ -
+Nimzo-Indian: classical, Adorjan gambit
+rnbq1rk1/p1pp1ppp/5n2/1p1Np3/1bB1P3/8/PPPP1PPP/R1BQK1NR w KQ -
+Ruy Lopez: classical defense, Zaitsev variation *
+rnbq1rk1/p2p1ppp/2p2n2/2b1p3/B3P3/2N5/PPPP1PPP/R1BQK1NR w KQ -
+Evans gambit *
+rnbq1rk1/p2p1ppp/2p2n2/2b1p3/B3P3/2NP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit *
+rnbq1rk1/p3ppbp/1p3np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 w - -
+Dutch: stonewall, Botwinnik variation *
+rnbq1rk1/p3ppbp/1p3np1/2pp4/8/1P2PN2/PBPPBPPP/RN1Q1RK1 w - -
+Queen's Indian: Euwe variation *
+rnbq1rk1/p4ppp/1p2pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQ1RK1 w - -
+Nimzo-Indian: 4.e3, Keres variation
+rnbq1rk1/p4ppp/2P2n2/2b1p3/B7/2N5/PPPP1PPP/R1BQK1NR b KQ -
+Evans gambit: compromised defense *
+rnbq1rk1/p4ppp/2p2n2/2bpp1B1/B3P3/2NP4/PPP2PPP/R2QK1NR b KQ -
+Evans gambit: Alapin-Steinitz variation *
+rnbq1rk1/p4ppp/2p2n2/2bpp3/4P3/1BNP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit: Lasker defense *
+rnbq1rk1/p4ppp/2p2n2/2bpp3/B3P3/2NP4/PPPB1PPP/R2QK1NR b KQ -
+Evans gambit: Sanders-Alapin variation *
+rnbq1rk1/p4ppp/2p5/2bpp3/B3n3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -
+Evans gambit: Richardson attack *
+rnbq1rk1/p4ppp/5n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR b KQ -
+Evans gambit: normal variation *
+rnbq1rk1/pp1p1ppp/2p2n2/b7/4PB2/P1NP4/1PP3PP/R2QKBNR w KQ -
+Ruy Lopez: Siesta, Kopayev variation *
+rnbq1rk1/pp1p1ppp/4pn2/2P5/1bP5/2N5/PPQ1PPPP/R1B1KBNR w KQ -
+Nimzo-Indian: classical, Pir\'c variation
+rnbq1rk1/pp1pppbp/5np1/2p5/3P4/4PN2/PPP1BPPP/RNBQK2R w KQ -
+English: Neo-Catalan declined *
+rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: stonewall with Nc3
+rnbq1rk1/pp2b1pp/2p1pn2/3p1p2/2PP4/BP3NP1/P3PPBP/RN1Q1RK1 b - -
+Dutch: stonewall with Ba3
+rnbq1rk1/pp2p1bp/2pp1np1/5p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+Dutch: Leningrad, main variation with c6
+rnbq1rk1/pp2ppbp/2p2np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O c6
+rnbq1rk1/pp2ppbp/2p2np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Russian, Szabo (Boleslavsky) variation
+rnbq1rk1/pp2ppbp/3p1np1/2p3B1/2PPP3/2N5/PP2BPPP/R2QK1NR w KQ -
+King's Indian: Averbakh, 6...c5
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+King's Indian: fianchetto, Yugoslav, 7.O-O
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PP4/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+King's Indian: fianchetto, Yugoslav system
+rnbq1rk1/pp2ppbp/3p1np1/2p5/2PPPP2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack, with Be2 and Nf3
+rnbq1rk1/pp2ppbp/3p1np1/2pP4/2P1PP2/2N2N2/PP4PP/R1BQKB1R b KQ -
+King's Indian: Four pawns attack, dynamic line
+rnbq1rk1/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R w KQ -
+Sicilian: dragon, Yugoslav attack, 7...O-O
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P1P2/4PN2/PPP1B1PP/RNBQ1RK1 b - -
+Dutch: stonewall variation *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/2P2NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O c6 *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/4PN2/PPPNBPPP/R1BQ1RK1 b - -
+Catalan: closed, 6...Nbd7 *
+rnbq1rk1/pp2ppbp/5np1/2pp4/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O *
+rnbq1rk1/pp2ppbp/5np1/2pp4/5P2/3PPN2/PPP1B1PP/RNBQ1RK1 b - -
+Dutch: classical variation *
+rnbq1rk1/pp2ppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R w KQ -
+Queen's Indian: old main line, 6.O-O *
+rnbq1rk1/pp2ppbp/5np1/2ppN3/5P2/4P3/PPPPB1PP/RNBQ1RK1 b - -
+Dutch defense, Alekhine variation *
+rnbq1rk1/pp2ppbp/5np1/3p4/3N4/6P1/PPP1PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O *
+rnbq1rk1/pp2ppbp/5np1/3p4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O, main line *
+rnbq1rk1/pp2ppbp/5np1/3p4/3P4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.O-O, main line
+rnbq1rk1/pp2ppbp/5np1/3p4/8/1N4P1/PPP1PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O Nb6 *
+rnbq1rk1/pp2ppbp/5np1/8/2pN4/6P1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.dc *
+rnbq1rk1/pp2ppbp/6p1/2Pn4/8/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.dc
+rnbq1rk1/pp2ppbp/6p1/2p5/2BPP3/2P5/P3NPPP/R1BQK2R w KQ -
+Gr\"unfeld: exchange, Spassky variation
+rnbq1rk1/pp2ppbp/6p1/2pn4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3
+rnbq1rk1/pp3pbp/2pp1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, orthodox, 7.d5 c6
+rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, orthodox, 7.Nge2 c6
+rnbq1rk1/pp3pbp/2pp1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+King's Indian: orthodox, Donner variation
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+Benoni: classical, 9.O-O
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+Benoni: classical without 9.O-O
+rnbq1rk1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP4PP/R1BQKB1R w KQ -
+Benoni: four pawns attack
+rnbq1rk1/pp3pbp/3p1np1/2pP4/8/2N2NP1/PP2PPBP/R1BQK2R w KQ -
+Benoni: fianchetto variation
+rnbq1rk1/pp3pbp/3p1np1/2ppP3/2P2P2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack, Florentine gambit
+rnbq1rk1/pp3pbp/3p1np1/3pp3/2P1P3/2N1BP2/PP2N1PP/R2QKB1R w KQ -
+King's Indian: S\"amisch, orthodox main line
+rnbq1rk1/pp3pbp/3ppnp1/2pP2B1/2P1P3/2N5/PP2BPPP/R2QK1NR w KQ -
+King's Indian: Averbakh, main line
+rnbq1rk1/pp3pbp/3ppnp1/2pP4/2P1PP2/2N2N2/PP2B1PP/R1BQK2R b KQ -
+King's Indian: Four pawns attack
+rnbq1rk1/pp3ppp/1b3n2/2ppN3/1P1PP3/P1N5/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Harksen gambit *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R b KQ -
+Ruy Lopez: open, classical defense *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R w KQ -
+Ruy Lopez: open, 9.c3 *
+rnbq1rk1/pp3ppp/1bp2n2/4N3/1PBPp3/P1N1B3/2P2PPP/R2QK2R b KQ -
+Ruy Lopez: open, Italian variation *
+rnbq1rk1/pp3ppp/1bp2n2/8/1PNPp3/P1N1B3/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: open, Berlin variation *
+rnbq1rk1/pp3ppp/2p2n2/2bP2N1/2B1p3/2N5/PPPP1PPP/R1BQK2R w KQ -
+two knights: Max Lange attack, Krause variation *
+rnbq1rk1/pp3ppp/2p2n2/2bPp1B1/2B5/2NP4/PPP2PPP/R2QK1NR b KQ -
+Scotch gambit: Anderssen (Paulsen, Suhle) counter-attack *
+rnbq1rk1/pp3ppp/2p2n2/3pp3/1b2P3/1BN2N2/PPPP1PPP/R1BQ1RK1 b - -
+Ruy Lopez: classical defense, Benelux variation *
+rnbq1rk1/pp3ppp/2p2n2/3pp3/2P5/2NP1N2/PP1QPPPP/R3KB1R w KQ -
+Sicilian: Canal-Sokolsky attack, Bronstein gambit *
+rnbq1rk1/pp3ppp/2p2n2/b2PN3/4p3/P1N5/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, Basque gambit (North Spanish variation) *
+rnbq1rk1/pp3ppp/3b1n2/2ppN1B1/3P4/3B4/PPP2PPP/RN1Q1RK1 b - -
+Petrov: classical attack, Tarrasch variation *
+rnbq1rk1/pp3ppp/3b1n2/2ppN3/3P4/2N5/PPP1BPPP/R1BQK2R w KQ -
+Petrov: classical attack, Jaenisch variation *
+rnbq1rk1/pp3ppp/3b4/2pnp3/8/P2PPNP1/1P3P1P/RNBQKB1R b KQ -
+Sicilian: Kan, Gipslis variation *
+rnbq1rk1/pp3ppp/3b4/2ppN3/3PB3/8/PPP2PPP/RNBQ1RK1 b - -
+Petrov: modern attack, Trifunovi\'c variation *
+rnbq1rk1/pp3ppp/4p3/1B6/3PP3/5N2/P2Q1PPP/R3K2R b KQ -
+QGD: Semi-Tarrasch, Kmoch variation
+rnbq1rk1/pp3ppp/4p3/2pn4/3P4/P1P1PP2/6PP/R1BQKBNR w KQ -
+Nimzo-Indian: S\"amisch, Botvinnik variation
+rnbq1rk1/pp3ppp/4pn2/2bP4/8/4PN2/PP3PPP/RNBQKB1R b KQ -
+QGA: classical, Steinitz variation *
+rnbq1rk1/pp3ppp/4pn2/2bp4/2P5/4PN2/PP3PPP/RNBQKB1R w KQ -
+QGA: classical variation, 6.O-O *
+rnbq1rk1/pp3ppp/4pn2/2bp4/2P5/P3PN2/1P3PPP/RNBQKB1R b KQ -
+QGA: classical, 6...a6 *
+rnbq1rk1/pp3ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 b - -
+Nimzo-Indian: 4.e3, Gligori\'c system with 7...dc
+rnbq1rk1/pp3ppp/4pn2/2pp4/1bPP4/2NBPN2/PP3PPP/R1BQK2R w KQ -
+Nimzo-Indian: 4.e3, main line with ...c5
+rnbq1rk1/pp3ppp/5n2/2bpp3/2P5/P3PN2/1P3PPP/RNBQKB1R w KQ -
+QGA: classical, Geller variation *
+rnbq1rk1/pp4pp/2p5/2bppp2/3PP1n1/2P4N/PP1NBPPP/R1BQ1RK1 b - -
+Philidor: Hanham, Berger variation *
+rnbq1rk1/ppp1b1pp/3ppn2/5p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch: classical variation
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/1P3NP1/P3PPBP/RNBQ1RK1 b - -
+Dutch: stonewall, Botwinnik variation
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 b - -
+Dutch: stonewall with Nc3
+rnbq1rk1/ppp1b1pp/4pn2/3p1p2/2PP4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch: stonewall variation
+rnbq1rk1/ppp1bpp1/4p2p/3p4/2PPn2B/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Lasker defense
+rnbq1rk1/ppp1bpp1/4pB1p/3p4/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: Neo-orthodox variation, 7.Bxf6
+rnbq1rk1/ppp1bpp1/4pn1p/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQ -
+QGD: Neo-orthodox variation
+rnbq1rk1/ppp1bpp1/4pn1p/3p4/2PP3B/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: Neo-orthodox variation, 7.Bh4
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/2RQKBNR b K -
+QGD: Anti-neo-orthodox variation
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1P3/PP3PPP/R2QKBNR w KQ -
+QGD: 4.Bg5 Be7, 5.e3 O-O
+rnbq1rk1/ppp1bppp/4pn2/3p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R b KQ -
+QGD: 6.Nf3
+rnbq1rk1/ppp1bppp/8/3p4/3Pn3/3B1N2/PPP2PPP/RNBQ1RK1 w - -
+Petrov: classical attack, Mason variation
+rnbq1rk1/ppp1ppbp/1n4p1/8/3P4/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O Nb6
+rnbq1rk1/ppp1ppbp/3p1np1/4P3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQ -
+Pirc: Austrian attack, 6.e5
+rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N2N2/PP3PPP/R2QKB1R b KQ -
+King's Indian: Zinnowitz variation
+rnbq1rk1/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP2BPPP/R2QK1NR b KQ -
+King's Indian: Averbakh system
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1B3/PP2BPPP/R2QK1NR b KQ -
+King's Indian: Semi-Averbakh system
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N1BN2/PP3PPP/R2QKB1R b KQ -
+King's Indian: Larsen variation
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: 6.Be2
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR w KQ -
+King's Indian: S\"amisch, 5...O-O
+rnbq1rk1/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP2B1PP/R1BQK1NR b KQ -
+King's Indian: Four pawns attack, 6.Be2
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PP3/6P1/PPP1NPBP/RNBQK2R b KQ -
+R\'eti: King's Indian attack, Pachman system *
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N1BN2/PPP3PP/R2QKB1R b KQ -
+Pirc: Austrian attack, 6.Be3
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQ -
+Pirc: Austrian attack
+rnbq1rk1/ppp1ppbp/3p1np1/8/3PPP2/2NB1N2/PPP3PP/R1BQK2R b KQ -
+Pirc: Austrian attack, 6.Bd3
+rnbq1rk1/ppp1ppbp/5np1/3p4/1PPP4/2N1PN2/P4PPP/R1BQKB1R b KQ -
+Gr\"unfeld: Makogonov variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/2RQKBNR b K -
+Gr\"unfeld: Gr\"unfeld gambit, Capablanca variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1P3/PP3PPP/R2QKBNR w KQ -
+Gr\"unfeld: Gr\"unfeld gambit
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP1B2/2N1PN2/PP3PPP/R2QKB1R b KQ -
+Gr\"unfeld with Bf4 & e3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R b KQ -
+Gr\"unfeld with e3 & Qb3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP1B1PPP/R2QKB1R b KQ -
+Gr\"unfeld: Opo\v censky variation
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/2NBPN2/PP3PPP/R1BQK2R b KQ -
+Gr\"unfeld with e3 & Bd3
+rnbq1rk1/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.O-O
+rnbq1rk1/ppp1ppbp/5np1/3p4/5P2/2P3PN/PP1PP1BP/RNBQK2R b KQ -
+Dutch: Leningrad, Basman system *
+rnbq1rk1/ppp1ppbp/5np1/8/2QPP3/2N2N2/PP3PPP/R1B1KB1R b KQ -
+Gr\"unfeld: Russian variation with e4
+rnbq1rk1/ppp1ppbp/6p1/3n4/3P4/5NP1/PP2PPBP/RNBQ1RK1 b - -
+Neo-Gr\"unfeld, 6.cd Nxd5, 7.O-O
+rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N1BP2/PP4PP/R2QKBNR b KQ -
+King's Indian: S\"amisch, orthodox, 7.d5
+rnbq1rk1/ppp2pbp/3p1np1/3Pp3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: Petrosian system
+rnbq1rk1/ppp2pbp/3p1np1/4P3/2P1P3/2N2N2/PP2BPPP/R1BQK2R b KQ -
+King's Indian: Andersson variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BN2/PP2BPPP/R2QK2R b KQ -
+King's Indian: Gligori\'c-Taimanov system
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N1BP2/PP4PP/R2QKBNR w KQ -
+King's Indian: S\"amisch, orthodox variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQ1RK1 b - -
+King's Indian: orthodox variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N2N2/PP2BPPP/R1BQK2R w KQ -
+King's Indian: classical variation
+rnbq1rk1/ppp2pbp/3p1np1/4p3/2PPP3/2N3P1/PP2NPBP/R1BQK2R b KQ -
+King's Indian: Pomar system
+rnbq1rk1/ppp2pbp/4pnp1/3p4/2PP4/1QN1PN2/PP3PPP/R1B1KB1R w KQ -
+Gr\"unfeld: Botvinnik variation
+rnbq1rk1/ppp2ppp/1b3n2/3pN3/1P2P3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 7.Bb3 *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P1N1B3/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: open, 8...Be6 *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P1N5/2P2PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 8.de *
+rnbq1rk1/ppp2ppp/1b3n2/4N3/1P1Pp3/P7/2P1NPPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Zukertort variation *
+rnbq1rk1/ppp2ppp/3b1n2/3pN3/3P4/8/PPP1BPPP/RNBQ1RK1 b - -
+Petrov: classical attack, Mason variation *
+rnbq1rk1/ppp2ppp/3bpn2/3p4/2PP4/P1N1P3/1P2NPPP/R1BQKB1R w KQ -
+Nimzo-Indian: Simagin variation
+rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2N1PN2/PP3PPP/R1BQKB1R w KQ -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3 d7d5
+rnbq1rk1/ppp2ppp/4pn2/3p4/1bPP4/2NBP3/PP3PPP/R1BQK1NR w KQ -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3 d5
+rnbq1rk1/ppp2ppp/4pn2/3p4/2PP4/P1PBP3/5PPP/R1BQK1NR b KQ -
+Nimzo-Indian: 4.e3, Botvinnik system
+rnbq1rk1/ppp2ppp/5P2/2b4Q/2pp4/2P5/PP3PPP/RNB1K1NR w KQ -
+Bishop's opening: Pratt variation
+rnbq1rk1/ppp2ppp/5n2/2b1p3/4p3/2PP4/PP1NBPPP/R1BQK1NR w KQ -
+Philidor: Hanham, Steiner variation *
+rnbq1rk1/ppp2ppp/5n2/2bP2N1/2B1p3/2N5/PPPP1PPP/R1BQK2R b KQ -
+two knights: Max Lange attack, Steinitz variation *
+rnbq1rk1/ppp2ppp/5n2/2bP4/2B1p3/2N2N2/PPPP1PPP/R1BQK2R w KQ -
+two knights: Max Lange attack *
+rnbq1rk1/ppp2ppp/5n2/2bPN3/8/2N5/PPPP1PPP/R1BQKB1R b KQ -
+Two knights defense *
+rnbq1rk1/ppp2ppp/5n2/2bPp3/8/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Two knights defense *
+rnbq1rk1/ppp2ppp/5n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQ -
+Philidor: Hanham, Krause variation *
+rnbq1rk1/ppp2ppp/5n2/3Pp3/1b6/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: Berlin defense, Nyholm attack *
+rnbq1rk1/ppp2ppp/5n2/3pN3/1b2P3/2N5/PPPPBPPP/R1BQK2R b KQ -
+Ruy Lopez: open Berlin defense, 5...Be7 *
+rnbq1rk1/ppp2ppp/5n2/3pN3/1b2P3/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, Rosenthal variation *
+rnbq1rk1/ppp2ppp/5n2/3pN3/4P3/P1PP4/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred, Rubinstein variation *
+rnbq1rk1/ppp2ppp/5n2/3pp1B1/4P3/P1PP1N2/2P2PPP/R2QKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred, Lipnitsky variation *
+rnbq1rk1/ppp2ppp/5n2/3pp3/1b2P3/2NP4/PPPN1PPP/R1BQKB1R b KQ -
+Ruy Lopez: closed Berlin defense, Chigorin variation *
+rnbq1rk1/ppp2ppp/5n2/4N3/1b2p3/2N5/PPPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Berlin defense, Minckwitz variation *
+rnbq1rk1/ppp2ppp/5n2/8/1b2p3/2NN4/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open Berlin defense, l'Hermet variation *
+rnbq1rk1/ppp2ppp/5n2/b2PN3/8/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, Riga variation *
+rnbq1rk1/ppp2ppp/5n2/b2p4/4P3/2NN4/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open Berlin defense, Showalter variation *
+rnbq1rk1/ppp2ppp/5n2/b2pN3/1P2P3/P1N5/2PP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open, 6.d4 b5 *
+rnbq1rk1/ppp2ppp/5n2/b2pN3/4P3/P1N5/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, 6.d4 *
+rnbq1rk1/ppp2ppp/5n2/b2pp3/4P3/P1N2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, center attack *
+rnbq1rk1/ppp2ppp/5n2/b3N3/1P1pP3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Richter variation *
+rnbq1rk1/ppp2ppp/8/2b1p3/8/2P1NN2/PP1P1nPP/R1BQKB1R w KQ -
+Scotch: Cochrane variation *
+rnbq1rk1/ppp2ppp/8/3pb3/2PPn3/3B4/PP3PPP/RNBQ1RK1 w - -
+Petrov: modern attack, Trifunovi\'c variation
+rnbq1rk1/ppp2ppp/8/b2pN3/1P2n3/P1N5/2PP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: open, Friess attack *
+rnbq1rk1/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQ -
+French: Albin-Alekhine-Ch\^atard attack, Spielmann variation
+rnbq1rk1/pppp1pp1/5n1p/4p1B1/4P2P/P1P5/1PP2PP1/R2QKBNR b KQ -
+Ruy Lopez: exchange variation, Alapin gambit *
+rnbq1rk1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/1BPP1PPP/R2QKB1R b KQ -
+Ruy Lopez: Archangelsk (counterthrust) variation *
+rnbq1rk1/pppp1ppp/1b3n2/4p3/1P2P3/P1NP1N2/2P2PPP/R1BQKB1R b KQ -
+Ruy Lopez: ...b5 & ...d6 *
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQ -
+Nimzo-Indian: Reshevsky variation
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQ -
+Nimzo-Indian: 4.e3 O-O
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2N1PN2/PP3PPP/R1BQKB1R b KQ -
+Nimzo-Indian: 4.e3 e8g8, 5.Nf3, without ...d5
+rnbq1rk1/pppp1ppp/4pn2/8/1bPP4/2NBP3/PP3PPP/R1BQK1NR b KQ -
+Nimzo-Indian: 4.e3 O-O, 5.Bd3
+rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P1P3/5PPP/R1BQKBNR b KQ -
+Nimzo-Indian: S\"amisch variation
+rnbq1rk1/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR w KQ -
+Nimzo-Indian: S\"amisch variation
+rnbq1rk1/pppp1ppp/5n2/4N3/1b2P3/2N5/PPPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, open variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: Berlin defense, 4.O-O *
+rnbq1rk1/pppp1ppp/5n2/4p3/1b2P3/2NP1N2/PPP2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Berlin defense, 4.O-O, d6 *
+rnbq1rk1/pppp1ppp/5n2/4p3/1bB1P3/2N2N2/PPPP1PPP/R1BQK2R b KQ -
+Ruy Lopez: Berlin defense, Beverwijk variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1P2P2/1PP3PP/R1BQKBNR b KQ -
+Ruy Lopez: exchange, Gligori\'c variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1P5/1PP2PPP/R1BQKBNR w KQ -
+Ruy Lopez: exchange variation, 5.O-O *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1PQ4/1PP2PPP/R1B1KBNR b KQ -
+Ruy Lopez: exchange, Bronstein variation *
+rnbq1rk1/pppp1ppp/5n2/4p3/4P3/P1b2N2/1PPPBPPP/R1BQK2R w KQ -
+Ruy Lopez: Exchange variation doubly deferred (DERLD) *
+rnbq1rk1/pppp1ppp/5n2/b3N3/4P3/P1N5/1PPP1PPP/R1BQKB1R b KQ -
+Ruy Lopez: open (Tarrasch) defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/2B1P3/P1N2N2/1PPP1PPP/R1BQK2R b KQ -
+Ruy Lopez: M\"oller defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQ -
+Ruy Lopez: 5.O-O *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPPBPPP/R1BQK2R b KQ -
+Ruy Lopez: closed defense *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP2PPP/R1BQKB1R b KQ -
+Ruy Lopez: Steinitz defense deferred (Russian defense) *
+rnbq1rk1/pppp1ppp/5n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQ -
+Ruy Lopez: modern Steinitz defense, 5.O-O *
+rnbq1rk1/pppp1ppp/8/3Pp3/1b6/8/PPPPNPPP/R1BQKB1R b KQ -
+Ruy Lopez: Bird's defense, Paulsen variation *
+rnbq1rk1/pppp2p1/8/2b2PPp/3pn3/3B1N2/PPP2P1P/RNBQK2R w KQ -
+KGA: Kieseritsky, Rice gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1PBP/RNBQK1NR w KQ -
+KGA: Hanstein gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/3P4/8/PPP2P1P/RNBQKBNR b KQ -
+KGA: Muzio gambit, Brentano defense *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/8/8/PPPP1P1P/RNBQKBNR w KQ -
+KGA: Muzio gambit *
+rnbq1rk1/pppp2pp/5n2/2b1pPP1/8/8/PPPPQP1P/RNB1KBNR b KQ -
+KGA: Muzio gambit, Kling and Horwitz counter-attack *
+rnbq1rk1/ppppb1pp/4p3/5p2/2PPn3/5NP1/PP2PPBP/RNBQ1RK1 w - -
+Dutch defense, Alekhine variation
+rnbq1rk1/ppppb1pp/4pn2/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R w KQ -
+Dutch defense
+rnbq1rk1/ppppppbp/5np1/6B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQ -
+R\'eti: King's Indian attack, Yugoslav variation *
+rnbq2k1/pp1p1ppp/1bp5/8/1P1Nr3/P1P5/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall counter-attack, 11...c6 *
+rnbq2k1/pp3ppp/1bp5/3p4/1P1Nr3/P1P5/4BPPP/R1BQ1RK1 w - -
+Ruy Lopez: Marshall, main line, 12.d2d4 *
+rnbq2k1/pp3ppp/1bp5/4r3/1P1Pp3/P1N1P3/2PQB1PP/R4RK1 w - -
+Ruy Lopez: open, Tarrasch trap *
+rnbq2k1/pp3ppp/2p1r3/3p4/1P1P4/P2B4/5PPP/R1BQ1RK1 w - -
+Ruy Lopez: Marshall, Kevitz variation *
+rnbq2k1/pppp1ppp/1b6/3N4/1PBpr1n1/P4N2/2P2PPP/R1BQ1K1R b - -
+Ruy Lopez: Rabinovich variation *
+rnbq3r/pp4pp/2P2nk1/8/2Bbp3/2N5/PPPP1PPP/R1BQK2R w KQ -
+Giuoco Piano: Ghulam Kassim variation *
+rnbq3r/pppp1k2/3b1n1p/8/4PQ1P/8/PPPP2P1/RNB1KB1R w KQ -
+KGA: Allgaier, Horny defense
+rnbqk1n1/pppp1p1r/7b/4N2p/2BPPppP/2N5/PPP3P1/R1BQK2R b KQq -
+KGA: Kieseritsky, long whip defense, Jaenisch variation
+rnbqk1nb/pp3p2/2pp4/4N1p1/2BPPp2/2N5/PPP3P1/R1BQK3 b Qkq -
+KGA: Greco gambit
+rnbqk1nr/1p1p1ppp/p3p3/2b5/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -
+Sicilian: Kan, Polugaievsky variation
+rnbqk1nr/5ppp/2p1p3/pp6/PbpP4/2N1PN2/1P1B1PPP/R2QKB1R w KQkq -
+QGD: semi-Slav, Abrahams variation
+rnbqk1nr/p1p1bppp/1p2p3/3pP3/3P4/2N1B3/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Frankfurt variation
+rnbqk1nr/p1pp1ppp/8/1pb1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Wing gambit *
+rnbqk1nr/p1pp2pp/8/1Bb1pp2/4P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: MacDonnell double gambit *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2B1P1Q1/8/PPPP1PPP/RNB1K1NR b KQkq -
+Bishop's opening: del Rio variation *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Philidor variation *
+rnbqk1nr/pp1p1ppp/2p5/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Lewis counter-gambit *
+rnbqk1nr/pp1pp2p/6p1/2pP1p2/2P5/2P5/P3PPPP/R1BQKBNR w KQkq -
+Beefeater defense
+rnbqk1nr/pp1ppp1p/6pb/2p5/2P1P3/5N2/PP1P1PPP/RNBQKB1R w KQkq -
+Sicilian: Acton extension
+rnbqk1nr/pp1pppbp/8/2p3B1/3P4/8/PPP1PPPP/RN1QKBNR w KQkq -
+Grob: Fritz gambit *
+rnbqk1nr/pp1pppbp/8/2pP2B1/8/8/PPP1PPPP/RN1QKBNR b KQkq -
+Grob: Romford counter-gambit *
+rnbqk1nr/pp2bppp/2p5/3p4/3PpB2/2P1P3/PP3PPP/RN1QKBNR w KQkq -
+Caro-Kann: advance, Short variation *
+rnbqk1nr/pp2ppb1/2p3p1/3pP2p/3P1P2/2N5/PPP3PP/R1BQKBNR w KQkq -
+Robatsch defense: Gurgenidze variation
+rnbqk1nr/pp2ppbp/2pp2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Robatsch defense: two knights, Suttles variation
+rnbqk1nr/pp2ppbp/6p1/1Bpp4/5P2/4PN2/PPPP2PP/RNBQK2R b KQkq -
+Dutch defense: Dutch-Indian (Nimzo-Dutch) variation *
+rnbqk1nr/pp2ppbp/6p1/2pp4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: closed *
+rnbqk1nr/pp2ppbp/6p1/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R b KQkq -
+King's Indian: 3.g3, counterthrust variation *
+rnbqk1nr/pp2ppbp/6p1/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Dutch defense *
+rnbqk1nr/pp2ppbp/6p1/2pp4/5P2/4PN2/PPPPB1PP/RNBQK2R b KQkq -
+Dutch defense *
+rnbqk1nr/pp2ppbp/6p1/3p4/3N4/6P1/PPP1PPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.cd *
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq -
+French: Winawer, advance, Russian variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer, advance variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/2N5/PPPB1PPP/R2QKBNR b KQkq -
+French: Winawer, advance, Bogolyubov variation
+rnbqk1nr/pp3ppp/4p3/2ppP3/1b1P4/P1N5/1PP2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance, 5.a3
+rnbqk1nr/pp3ppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance variation
+rnbqk1nr/pp3ppp/4p3/3pP3/1P6/2p2N2/1PP2PPP/R1BQKB1R b KQkq -
+French: Winawer, advance, Rauzer variation
+rnbqk1nr/ppp1bppp/3p4/4p3/2B1P3/2P2N2/PP1P1PPP/RNBQK2R b KQkq -
+Philidor: Steinitz variation
+rnbqk1nr/ppp1bppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Charousek (Petrosian) variation
+rnbqk1nr/ppp1bppp/4p3/3pP1B1/3P4/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Vistaneckis (Nimzovich) variation
+rnbqk1nr/ppp1p1bp/3p2p1/5p2/2PPP3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Modern defense: Averbakh system, Randspringer variation
+rnbqk1nr/ppp1ppbp/3p2p1/8/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Modern defense
+rnbqk1nr/ppp1ppbp/3p2p1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Modern defense: Averbakh system
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Robatsch defense: two knights variation
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Robatsch defense: Geller's system
+rnbqk1nr/ppp1ppbp/3p2p1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Robatsch defense: Pseudo-Austrian attack
+rnbqk1nr/ppp1ppbp/6p1/3p4/5P2/5NP1/PPPPP2P/RNBQKB1R b KQkq -
+Dutch defense *
+rnbqk1nr/ppp2p1p/3b4/6p1/8/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Bird: From gambit, Lasker variation
+rnbqk1nr/ppp2pb1/3p3p/6p1/2BPPp1P/3Q1N2/PPP3P1/RNB1K2R b KQkq -
+KGA: Philidor gambit, Schultz variation
+rnbqk1nr/ppp2ppp/1b1p4/8/2P1p3/1N6/PP1PPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Kmoch variation *
+rnbqk1nr/ppp2ppp/3b4/3Pp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+QP counter-gambit: Maroczy gambit
+rnbqk1nr/ppp2ppp/3b4/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: Schlechter variation *
+rnbqk1nr/ppp2ppp/3bp3/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn: stonewall attack *
+rnbqk1nr/ppp2ppp/3p4/2b1P3/4P3/5N2/PPPP2PP/RNBQKB1R b KQkq -
+KGD: classical, Soldatenkov variation
+rnbqk1nr/ppp2ppp/3p4/2b1p3/1P2PP2/5N2/P1PP2PP/RNBQKB1R b KQkq -
+KGD: classical, Heath variation
+rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/2P2N2/PP1P2PP/RNBQKB1R b KQkq -
+KGD: classical, 4.c3
+rnbqk1nr/ppp2ppp/3p4/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+Bishop's opening: Calabrese counter-gambit, Jaenisch variation *
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP1NPPP/R1BQKB1R b KQkq -
+French: Winawer, Alekhine (Mar\'oczy) gambit
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Winawer (Nimzovich) variation
+rnbqk1nr/ppp2ppp/4p3/3p4/1b1PP3/2N5/PPPB1PPP/R2QKBNR b KQkq -
+French: Winawer, fingerslip variation
+rnbqk1nr/ppp2ppp/4p3/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance variation
+rnbqk1nr/ppp2ppp/4p3/8/3Pp3/P1b5/1PP1NPPP/R1BQKB1R w KQkq -
+French: Winawer, Alekhine gambit
+rnbqk1nr/ppp2ppp/8/2bp4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Balogh variation *
+rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/2P5/PP1P1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Lewis counter-gambit
+rnbqk1nr/ppp2ppp/8/2bpp3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Lewis gambit *
+rnbqk1nr/ppp2ppp/8/2bpp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening: Ponziani gambit *
+rnbqk1nr/ppp2ppp/8/4P3/1bP5/4p3/PP1B1PPP/RN1QKBNR w KQkq -
+QGD: Albin counter-gambit, Lasker trap
+rnbqk1nr/ppp3pp/3p4/2b1pp2/4PP2/2P2N2/PP1P2PP/RNBQKB1R w KQkq -
+KGD: classical counter-gambit
+rnbqk1nr/ppp3pp/4P3/2bp2N1/4p3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Philidor: Philidor counter-gambit, Berger variation
+rnbqk1nr/ppp3pp/8/2b2p2/2BpP3/2P2N2/PP4PP/RNBQK2R b KQkq -
+KGD: classical, R\'eti variation
+rnbqk1nr/pppp1pbp/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Paulsen defense
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp1P/5N2/PPPP2P1/RNBQK2R b KQkq -
+KGA: Philidor gambit
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQ1RK1 b kq -
+KGA: Hanstein gambit
+rnbqk1nr/pppp1pbp/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+King's knight's gambit
+rnbqk1nr/pppp1ppp/4p3/8/1bPP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Franco-Indian (Keres) defense
+rnbqk1nr/pppp1ppp/8/2b1p3/1PB1P3/8/P1PP1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Wing gambit
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/2P5/PP1P1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Philidor variation
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Bishop's opening: Classical variation *
+rnbqk1nr/pppp1ppp/8/2b1p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Classical variation
+rnbqk1nr/pppp1ppp/8/2b1p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Lewis gambit
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+Bishop's opening: Philidor counter-attack *
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Bishop's opening: Berlin defense *
+rnbqk1nr/pppp1ppp/8/2b1p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Bishop's opening *
+rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Bishop's opening: Calabrese counter-gambit *
+rnbqk1nr/pppp1ppp/8/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: classical variation
+rnbqk1nr/pppp1ppp/8/2b1p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: Hillbilly attack *
+rnbqk1nr/pppp1ppp/8/2b1p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Krejcik variation *
+rnbqk1nr/pppp1ppp/8/4p3/1bB1PP2/8/P1PP2PP/RNBQK1NR b KQkq -
+Bishop's opening: MacDonnell double gambit
+rnbqk1nr/pppp1ppp/8/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English, Kramnik-Shirov counterattack
+rnbqk1nr/pppp1ppp/8/8/2B1P2b/5N2/PPPP3p/RNBQ1R1K b kq -
+KGA: Cunningham, three pawns gambit
+rnbqk1nr/pppp1ppp/8/8/2B1Pp1b/5NP1/PPPP3P/RNBQK2R b KQkq -
+KGA: Cunningham, Bertin gambit
+rnbqk1nr/pppp1ppp/8/8/2BPP2b/5N2/P1P4p/RNBQ1R1K b kq -
+Bishop's opening: Four pawns' gambit
+rnbqk1nr/pppp2pp/3b4/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Schurig gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/1P6/8/P1PP1PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Bryan counter-gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Bledow variation *
+rnbqk1nr/pppp2pp/8/2b1pP2/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, L\'opez-Gianutio counter-gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+KGA: bishop's gambit, Maurian defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Ruy L\'opez defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Cozio (Morphy) defense *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: bishop's gambit *
+rnbqk1nr/pppp2pp/8/2b1pP2/8/8/PPPPNPPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Steinitz defense *
+rnbqk1nr/pppp2pp/8/2b1pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening: Greco gambit *
+rnbqk1nr/pppp2pp/8/4Pp2/1b1p4/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Nimzovich variation *
+rnbqk1nr/pppp2pp/8/4pP2/3b4/2P5/PP3PPP/RNBQKBNR b KQkq -
+KGA: bishop's gambit, Anderssen variation *
+rnbqk1nr/pppp2pp/8/4pP2/3b4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+KGA: bishop's gambit, Morphy variation *
+rnbqk1nr/ppppb1pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit *
+rnbqk1nr/ppppbp1p/8/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Polerio defense
+rnbqk1nr/ppppbppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Cunningham defense
+rnbqk1nr/ppppp1bp/6p1/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -
+Dutch: Leningrad, Karlsbad variation
+rnbqk1nr/ppppppbp/6p1/8/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Robatsch defense
+rnbqk1nr/ppppppbp/6p1/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqk1nr/ppppppbp/6p1/8/3PPP2/8/PPP3PP/RNBQKBNR b KQkq -
+Robatsch defense: three pawns attack
+rnbqk1nr/ppppppbp/8/8/3P2p1/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Grob: spike attack *
+rnbqk1r1/ppp2pP1/4p3/3p4/1b1P2Qp/2N5/PPP2PP1/R3KBNR b KQq -
+French: MacCutcheon, Grigoriev variation
+rnbqk2r/1p2bp2/p2ppn1p/6p1/3NPP1B/2N2Q2/PPP3PP/R3KB1R w KQkq -
+Sicilian: Najdorf, G\"oteborg (Argentine) variation
+rnbqk2r/1p2bppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 7...Be7
+rnbqk2r/1pp2ppp/1b3n2/p2p4/4p3/1N1P2P1/PPP1PPBP/RNBQK2R w KQkq -
+Alekhine's defense: modern, Keres variation *
+rnbqk2r/1ppnbppp/p3p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Mar\'oczy variation
+rnbqk2r/2pp1ppp/5n2/ppb1p3/4P3/1BN5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined, 5.a4 *
+rnbqk2r/p1p2ppp/1p1bpn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Queen's pawn game, Rubinstein (Colle-Zukertort) variation *
+rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: Fischer variation, 5.Ne2
+rnbqk2r/p1pp1ppp/1p2pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: Fischer variation
+rnbqk2r/p1pp1ppp/5n2/1Bb1p3/4P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p1pp1ppp/5n2/1pb1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Evans gambit declined *
+rnbqk2r/p1pp1ppp/5n2/1pb1p3/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq -
+Evans counter-gambit *
+rnbqk2r/p1pp1ppp/8/2b1p3/Np2n1Q1/1B6/PPPP1PPP/R1B1K1NR b KQkq -
+Evans gambit declined, Hirschbach variation *
+rnbqk2r/p1pp1ppp/8/2b1p3/Np2n3/1B5N/PPPP1PPP/R1BQK2R b KQkq -
+Evans gambit declined, Lange variation *
+rnbqk2r/p2p1pp1/4pn1p/1ppP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -
+Nimzo-Indian: Leningrad, ...b5 gambit
+rnbqk2r/p2p1ppp/1p2pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: S\"amisch, O'Kelly variation
+rnbqk2r/p2p1ppp/2p2n2/1pb1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano: Bird's attack *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Evans gambit: Mayet defense *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Evans gambit: 5...Be7 *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/4P3/2NB4/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit: Stone-Ware variation *
+rnbqk2r/p2p1ppp/2p2n2/2b1p3/B3P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p4ppp/2p2n2/1Bb1p3/8/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit *
+rnbqk2r/p4ppp/2p2n2/2b5/B3p3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit: Cochrane variation *
+rnbqk2r/p4ppp/2p2n2/2bpp3/B3P3/2NP4/PPP2PPP/R1BQK1NR b KQkq -
+Evans gambit *
+rnbqk2r/p4ppp/2p2n2/2bpp3/BP2P3/2N5/P1PP1PPP/R1BQK1NR b KQkq -
+Evans gambit: Leonhardt variation *
+rnbqk2r/p4ppp/2p2n2/2bpp3/N3P3/8/PPPPBPPP/R1BQK1NR b KQkq -
+Evans gambit: Cordel variation *
+rnbqk2r/pp1n1ppp/4p3/2bpP3/5PQ1/2N5/PPP3PP/R1B1KBNR b KQkq -
+French: Steinitz, Bradford attack
+rnbqk2r/pp1nbppp/4p3/2ppP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Breyer variation
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Piano *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Giuoco Piano *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/2B1P3/2N5/PPPPQPPP/R1B1K1NR b KQkq -
+Giuoco Piano: close variation *
+rnbqk2r/pp1p1ppp/2p2n2/2b1p3/4P3/3P4/PPP1BPPP/RNBQK1NR w KQkq -
+Philidor: Steinitz variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1b2P3/1BN5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: classical defense, Charousek variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Ruy Lopez: classical defense, 4.c3 *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1P3/2N5/PPPPQPPP/R1B1K1NR b KQkq -
+Ruy Lopez: classical defense, Boden variation *
+rnbqk2r/pp1p1ppp/2p2n2/4p3/1bB1PP2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+Ruy Lopez: Cordel gambit *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4P3/P1NP4/1PPB1PPP/R2QKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pp1p1ppp/2p2n2/b3p3/4PP2/P1NP4/1PP3PP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, siesta variation *
+rnbqk2r/pp1p1ppp/4p3/2pP4/1bP1n3/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Nimzo-Indian: three knights, Euwe variation
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP2NPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: 4.e3 c5, 5.Ne2 (Rubinstein, anti-H\"ubner system)
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+Nimzo-Indian: 4.e3 c5
+rnbqk2r/pp1p1ppp/4pn2/2p5/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, 4...c5
+rnbqk2r/pp1p1ppp/4pn2/2p5/2PP4/P1P1P3/5PPP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pp1p1ppp/4pn2/2pP4/1bP5/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: three knights, Korchnoi variation
+rnbqk2r/pp1p1ppp/4pn2/4P3/1b1N4/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Pin, Koch variation
+rnbqk2r/pp1p1ppp/4pn2/8/1b1NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Pin variation (Sicilian counter-attack)
+rnbqk2r/pp1p1ppp/5n2/2p1p3/2P5/3P4/PP1QPPPP/RN2KBNR w KQkq -
+Sicilian: Canal-Sokolsky attack, Sokolsky variation *
+rnbqk2r/pp1p1ppp/5n2/4p3/1b1NP3/2NB4/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Pin, Jaffe variation
+rnbqk2r/pp1p1ppp/5n2/b1p1p3/4P3/P1NP4/1PP2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Duras (Keres) variation *
+rnbqk2r/pp1pp1bp/2p3pn/5p2/3P4/5NP1/PPP1PPBP/RNBQ1RK1 w kq -
+Dutch: Leningrad, Basman system
+rnbqk2r/pp1pppbp/5np1/2P5/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+English: Neo-Catalan accepted *
+rnbqk2r/pp1pppbp/5np1/2p5/1P6/P3PN2/2PP1PPP/RNBQKB1R b KQkq -
+English: Romanishin gambit *
+rnbqk2r/pp2npbp/6p1/3pp3/8/1N4P1/PPP1PPBP/RNBQK2R w KQkq -
+Neo-Gr\"unfeld, 5.cd, main line *
+rnbqk2r/pp2nppp/4p3/2ppP3/3P2Q1/P1P5/2P2PPP/R1B1KBNR b KQkq -
+French: Winawer, advance, poisoned pawn variation
+rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P2N2/2P2PPP/R1BQKB1R b KQkq -
+French: Winawer, advance, positional main line
+rnbqk2r/pp2nppp/4p3/2ppP3/3P4/P1P5/2P2PPP/R1BQKBNR w KQkq -
+French: Winawer, advance, 6...Ne7
+rnbqk2r/pp2nppp/4p3/2ppP3/P2P4/2P5/2P2PPP/R1BQKBNR b KQkq -
+French: Winawer, advance, Smyslov variation
+rnbqk2r/pp2ppbp/3p1np1/2p5/3PPP2/2N2N2/PPP3PP/R1BQKB1R w KQkq -
+Pirc: Austrian attack, dragon formation
+rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1B3/PPP1BPPP/R2QK2R b KQkq -
+Sicilian: dragon, classical attack
+rnbqk2r/pp2ppbp/3p1np1/8/3NP3/2N1BP2/PPP3PP/R2QKB1R b KQkq -
+Sicilian: dragon, Yugoslav attack
+rnbqk2r/pp2ppbp/5np1/1Bpp4/8/1P2PN2/PBPP1PPP/RN1QK2R b KQkq -
+Queen's Indian: Capablanca variation *
+rnbqk2r/pp2ppbp/5np1/2Pp4/8/4PN2/PPP1BPPP/RNBQK2R b KQkq -
+Catalan: open, classical line *
+rnbqk2r/pp2ppbp/5np1/2Pp4/8/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Catalan: open, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/3P4/4PN2/PPP1BPPP/RNBQK2R w KQkq -
+Catalan: closed, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+Neo-Gr\"unfeld, 5.Nf3 *
+rnbqk2r/pp2ppbp/5np1/2pp4/5P2/4PN2/PPPPB1PP/RNBQ1RK1 b kq -
+Dutch defense *
+rnbqk2r/pp2ppbp/5np1/2pp4/5P2/5NP1/PPPPP1BP/RNBQK2R w KQkq -
+Dutch: Leningrad, main variation *
+rnbqk2r/pp2ppbp/5np1/2pp4/8/1P2PN2/PBPPBPPP/RN1QK2R b KQkq -
+Queen's Indian: 5.Bg2 Be7 *
+rnbqk2r/pp2ppbp/6p1/2p4n/2PP4/1P3N2/PB1P1PPP/RN1QKB1R w KQkq -
+Queen's Indian: Rubinstein variation *
+rnbqk2r/pp2ppbp/6p1/2p5/2PP2n1/1P3N2/PB1P1PPP/RN1QKB1R w KQkq -
+Queen's Indian: B\"urger variation *
+rnbqk2r/pp3pbp/3p1np1/1BpP4/4PP2/2N5/PP4PP/R1BQK1NR b KQkq -
+Benoni: Taimanov variation
+rnbqk2r/pp3pbp/3p1np1/2pP2B1/4P3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+Benoni: classical, 8.Bg5
+rnbqk2r/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQK2R b KQkq -
+Benoni: classical without 9.O-O
+rnbqk2r/pp3pbp/3p1np1/2pPP3/5P2/2N5/PP4PP/R1BQKBNR b KQkq -
+Benoni: Mikenas variation
+rnbqk2r/pp3pp1/3ppn1p/2pP4/1bP4B/2N5/PP2PPPP/R2QKBNR w KQkq -
+Nimzo-Indian: Leningrad, main line
+rnbqk2r/pp3ppp/2p2n2/1BbP4/3p4/5N2/PPP1QPPP/RNB1K2R b KQkq -
+Bishop's opening: Urusov gambit, Panov variation *
+rnbqk2r/pp3ppp/2p2n2/2b1p3/4P3/1B1p4/PPPPQPPP/RNB1K1NR w KQkq -
+Giuoco Piano: Eisinger variation *
+rnbqk2r/pp3ppp/2p2n2/2bP4/2BPp3/2N2N2/PPP2PPP/R1BQK2R b KQkq d3
+Giuoco Piano *
+rnbqk2r/pp3ppp/2p2n2/2bPN3/4p3/2N5/PPPPBPPP/R1BQK2R b KQkq -
+Hungarian defense: Tartakower variation *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/4P3/1BN5/PPPPQPPP/R1B1K1NR b KQkq -
+Giuoco Piano: center-holding variation *
+rnbqk2r/pp3ppp/2p2n2/2bpp3/4P3/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Delmar variation *
+rnbqk2r/pp3ppp/2p2n2/b2pp3/4P3/P1NP2P1/1PPB1P1P/R2QKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, fianchetto (Bronstein) variation *
+rnbqk2r/pp3ppp/2p2n2/b2pp3/4P3/P1NP4/1PPBNPPP/R2QKB1R b KQkq -
+Ruy Lopez: modern Steinitz defense, Rubinstein variation *
+rnbqk2r/pp3ppp/2pb1n2/3p4/2PPp3/1QN1P3/PP3PPP/R1B1KBNR w KQkq -
+French: advance, Milner-Barry gambit *
+rnbqk2r/pp3ppp/2pb4/4n3/3pP3/3P1N2/PPP1B1PP/RNBQK2R b KQkq -
+Ponziani counter-gambit, Cordel variation *
+rnbqk2r/pp3ppp/2pbpn2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+Colle system *
+rnbqk2r/pp3ppp/3p1n2/2p1p3/1b2P3/2NP1N2/PPP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Berlin defense, Duras variation *
+rnbqk2r/pp3ppp/3p1n2/b1p1p3/4P3/P1NP1N2/1PP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Morphy defense, Duras variation *
+rnbqk2r/pp3ppp/4p3/2Pn4/8/P1P2P2/4P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch, Keres variation
+rnbqk2r/pp3ppp/4pn2/2b3B1/3p4/P3P3/1PP2PPP/RN1QKBNR w KQkq -
+QGA: Alekhine defense, Alatortsev variation *
+rnbqk2r/pp3ppp/4pn2/2bp4/2P5/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGA: classical variation *
+rnbqk2r/pp3ppp/4pn2/2pP4/3P4/P1P2P2/4P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pp3ppp/5n2/1B1pN3/1b1Pp3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Giuoco Piano: Anderssen variation *
+rnbqk2r/pp3ppp/5n2/2bpp3/2B5/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Giuoco Piano *
+rnbqk2r/pp3ppp/5n2/2bpp3/8/1BNP4/PPP2PPP/R1BQK1NR b KQkq -
+Giuoco Piano: LaBourdonnais variation *
+rnbqk2r/pp3ppp/5n2/2ppp3/1b2P3/2NP4/PPPB1PPP/R2QKBNR w KQkq -
+Ruy Lopez: old Steinitz defense, semi-Duras variation *
+rnbqk2r/pp4pp/2p2n2/2bPp3/2B2P2/8/PPP3PP/RNBQK1NR w KQkq -
+KGD: classical, R\'eti variation *
+rnbqk2r/pp4pp/4p3/2Pn1p2/8/P1P2P2/4P1PP/R1BQKBNR w KQkq -
+Nimzo-Indian: S\"amisch, Romanovsky variation
+rnbqk2r/ppn1bppp/8/2p1p3/8/2NP2PN/PP2PPBP/R1BQK2R b KQkq -
+Sicilian: accelerated fianchetto, Simagin variation *
+rnbqk2r/ppp1b1pp/3p1n2/3Pp3/4N3/2PB4/PP3PPP/RNBQK2R w KQkq -
+Ponziani counter-gambit, Cordel variation
+rnbqk2r/ppp1bppp/4p3/3p2B1/2PPn3/2N1P3/PP3PPP/R2QKBNR w KQkq -
+QGD: Lasker variation
+rnbqk2r/ppp1bppp/4p3/3pP1B1/3Pn3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical, Tartakower variation
+rnbqk2r/ppp1bppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R3KBNR b KQkq -
+French: classical, Anderssen-Richter variation
+rnbqk2r/ppp1bppp/4pB2/3p4/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: classical, Anderssen variation
+rnbqk2r/ppp1bppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: 4.Bg5 Be7
+rnbqk2r/ppp1bppp/4pn2/3p2B1/3PP3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: classical
+rnbqk2r/ppp1bppp/4pn2/3p4/2P5/5NP1/PP1PPPBP/RNBQ1RK1 b kq -
+English: Neo-Catalan declined
+rnbqk2r/ppp1bppp/4pn2/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: classical variation (5.Bf4)
+rnbqk2r/ppp1bppp/4pn2/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Catalan: closed, 5.Nf3
+rnbqk2r/ppp1bppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R w KQkq -
+Catalan: open, classical line
+rnbqk2r/ppp1bppp/5n2/3p2B1/3Np3/2PP4/PP2PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: modern, Flohr variation *
+rnbqk2r/ppp1bppp/5n2/3pp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Tayler opening *
+rnbqk2r/ppp1bppp/8/3pP3/4n3/2N2N2/PPPP2PP/R1BQKB1R w KQkq -
+Vienna gambit: Breyer variation
+rnbqk2r/ppp1npbp/6p1/3pp3/8/3P1NP1/PPP1PPBP/RNBQ1RK1 w kq -
+R\'eti: King's Indian attack, Pachman system
+rnbqk2r/ppp1nppp/8/8/3PN3/8/PP3PPP/R2QKBNR w KQkq -
+Bishop's opening: Lisitsyn variation *
+rnbqk2r/ppp1ppbp/1n1p2p1/4P3/P2P4/1B3N2/1PP2PPP/RNBQK2R b KQkq -
+Alekhine's defense: modern, Keres variation
+rnbqk2r/ppp1ppbp/1n4p1/8/3PP3/6P1/PP2NPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.cd, main line
+rnbqk2r/ppp1ppbp/3p1np1/6B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+King's Indian: Smyslov system
+rnbqk2r/ppp1ppbp/3p1np1/6B1/2PPP3/2N5/PP3PPP/R2QKBNR b KQkq -
+King's Indian: accelerated Averbakh system
+rnbqk2r/ppp1ppbp/3p1np1/8/2BPPP2/2N5/PPP3PP/R1BQK1NR b KQkq -
+Pirc: Austrian attack, Ljubojevi\'c variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PP4/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+King's Indian: fianchetto variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+King's Indian: 5.Nf3
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N2P2/PP4PP/R1BQKBNR b KQkq -
+King's Indian: S\"amisch variation
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N3P1/PP3P1P/R1BQKBNR b KQkq -
+King's Indian with e4 & g3
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N4P/PP3PP1/R1BQKBNR b KQkq -
+King's Indian: Makagonov system (5.h3)
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2BPPP/R1BQK1NR b KQkq -
+King's Indian: 5.Be2
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPP3/2N5/PP2NPPP/R1BQKB1R b KQkq -
+King's Indian: Kramer system
+rnbqk2r/ppp1ppbp/3p1np1/8/2PPPP2/2N5/PP4PP/R1BQKBNR b KQkq -
+King's Indian: Four pawns attack
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP1P1/2N5/PPP1BP1P/R1BQK1NR b KQkq -
+Pirc: Chinese variation
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP2P/2N5/PPP1BPP1/R1BQK1NR b KQkq -
+Pirc: bayonet (Mariotti) attack
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N1P/PPP2PP1/R1BQKB1R b KQkq -
+Pirc: classical, h3 system
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP1BPPP/R1BQK2R b KQkq -
+Pirc: classical system, 5.Be2
+rnbqk2r/ppp1ppbp/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R w KQkq -
+Pirc: classical (two knights) system
+rnbqk2r/ppp1ppbp/5np1/3p2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Gr\"unfeld: 5.Bg5
+rnbqk2r/ppp1ppbp/5np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq -
+Queen's Indian: Marienbad system *
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP1B2/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Gr\"unfeld: 5.Bf4
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/1QN2N2/PP2PPPP/R1B1KB1R b KQkq -
+Gr\"unfeld: Russian variation
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+Gr\"unfeld: 5.e3
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Gr\"unfeld: Three knights variation
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Neo-Gr\"unfeld, 5.Nf3
+rnbqk2r/ppp1ppbp/5np1/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+King's Indian: 3.g3, counterthrust variation
+rnbqk2r/ppp1ppbp/5np1/3p4/Q1PP4/2N2N2/PP2PPPP/R1B1KB1R b KQkq -
+Gr\"unfeld: Flohr variation
+rnbqk2r/ppp1ppbp/6p1/3n4/3P4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Neo-Gr\"unfeld, 5.cd
+rnbqk2r/ppp1ppbp/6p1/8/2BPP3/2P5/P4PPP/R1BQK1NR b KQkq -
+Gr\"unfeld: exchange, classical variation
+rnbqk2r/ppp1ppbp/6p1/8/3PP3/2P2N2/P4PPP/R1BQKB1R b KQkq -
+Gr\"unfeld: modern exchange variation
+rnbqk2r/ppp1ppbp/6pn/3p4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Dutch defense, Blackburne variation *
+rnbqk2r/ppp1ppbp/6pn/3p4/5P2/6P1/PPPPP1BP/RNBQK1NR w KQkq -
+Dutch: Leningrad, Karlsbad variation *
+rnbqk2r/ppp2p1p/3b1n2/3PN3/2B2ppP/8/PPPP2P1/RNBQ1RK1 b kq -
+KGA: Kieseritsky, Rice gambit
+rnbqk2r/ppp2p2/4p1pp/3pP3/3Pn1Q1/2P5/P1PB1PPP/R3KBNR w KQkq -
+French: MacCutcheon, Lasker variation, 8...g6
+rnbqk2r/ppp2pbp/6p1/3np3/8/2N2NP1/PP1PPPBP/R1BQK2R w KQkq -
+English: Anglo-Gr\"unfeld defense, Korchnoi variation
+rnbqk2r/ppp2pp1/4pP1p/3p2B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Chigorin variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P3B/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Bernstein variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N1B3/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, Janowski variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/1b1P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: MacCutcheon, Dr. Olland (Dutch) variation
+rnbqk2r/ppp2pp1/4pn1p/3pP3/3P4/2b5/PPPB1PPP/R2QKBNR w KQkq -
+French: MacCutcheon, Lasker variation
+rnbqk2r/ppp2ppp/3b1n2/3pN3/3P4/3B4/PPP2PPP/RNBQK2R b KQkq -
+Petrov: classical attack, Marshall variation *
+rnbqk2r/ppp2ppp/3b3n/8/3P4/5N2/PPP1P1PP/RNBQKB1R b KQkq -
+Bird: From gambit, Lipke variation
+rnbqk2r/ppp2ppp/3b4/3np3/2B5/P3P3/1P1P1PPP/RNBQK1NR b KQkq -
+Sicilian: Kan, Polugaievsky variation *
+rnbqk2r/ppp2ppp/3b4/3np3/8/P3P1P1/1P1P1P1P/RNBQKBNR b KQkq -
+Sicilian: Kan, Swiss cheese variation *
+rnbqk2r/ppp2ppp/3b4/3np3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, 5.Bd3 *
+rnbqk2r/ppp2ppp/3b4/3p4/3Pn3/3B1N2/PPP2PPP/RNBQK2R w KQkq -
+Petrov: classical attack, Marshall variation
+rnbqk2r/ppp2ppp/3bpn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Giuoco Pianissimo *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Giuoco Pianissimo *
+rnbqk2r/ppp2ppp/3p1n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense (Modern bishop's opening) *
+rnbqk2r/ppp2ppp/3p1n2/4p3/1b2P3/5N2/PPPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense, Mortimer variation *
+rnbqk2r/ppp2ppp/3p1n2/4p3/4P3/2bP1N2/PPP2PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Berlin defense, Anderssen variation *
+rnbqk2r/ppp2ppp/3p1n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Anderssen variation *
+rnbqk2r/ppp2ppp/3p4/2b1pP2/2B1P1n1/2N5/PPPP2PP/R1BQK1NR b KQkq -
+Giuoco Pianissimo: Dubois variation *
+rnbqk2r/ppp2ppp/3p4/2b5/N2pP1n1/5N2/PPP2PPP/R1BQKB1R w KQkq -
+two knights defense: Kieseritsky variation *
+rnbqk2r/ppp2ppp/3p4/4p3/1b2n3/2P2N2/PP1PNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense, Mortimer trap *
+rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P1Q5/1P2PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation, main line
+rnbqk2r/ppp2ppp/4p3/3p4/2PPn3/P7/1PQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical, Noa variation, main line, 7.Qc2
+rnbqk2r/ppp2ppp/4pn2/3p2B1/1b1PP3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: MacCutcheon variation
+rnbqk2r/ppp2ppp/4pn2/3p2B1/1bPP4/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD: Vienna variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: Ragozin variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation
+rnbqk2r/ppp2ppp/4pn2/3p4/1bPP4/P1N5/1PQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical, Noa variation, 5.a3
+rnbqk2r/ppp2ppp/4pn2/3pP1B1/1b1P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: MacCutcheon, advance variation
+rnbqk2r/ppp2ppp/4pn2/6B1/1bpP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD: Ragozin, Vienna variation
+rnbqk2r/ppp2ppp/5n2/1BbPp3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/5n2/2bPp3/1PP5/8/P2P1PPP/RNBQKBNR b KQkq -
+Center game, Kieseritsky variation *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Scotch gambit: Dubois-R\'eti defense *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Scotch gambit: Benima defense *
+rnbqk2r/ppp2ppp/5n2/2bPp3/8/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Bishop's opening/Petrov: Urusov gambit *
+rnbqk2r/ppp2ppp/5n2/2bpp3/4P3/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/ppp2ppp/5n2/2bpp3/4P3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Klein variation *
+rnbqk2r/ppp2ppp/5n2/3P4/1b3P2/2NPp3/PPPB2PP/R2QKBNR w KQkq -
+KGD: Falkbeer, Morphy gambit
+rnbqk2r/ppp2ppp/5n2/3Pp3/1b6/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch: Relfsson gambit (`MacLopez') *
+rnbqk2r/ppp2ppp/5n2/3p4/1b1P4/2N5/PPQ1PPPP/R1B1KBNR w KQkq -
+Nimzo-Indian: classical, Noa variation, 5.cd ed
+rnbqk2r/ppp2ppp/5n2/3pp3/4P3/P1PP1P2/2P3PP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, Alapin variation *
+rnbqk2r/ppp2ppp/5n2/3pp3/4P3/P1PP4/2P2PPP/R1BQKBNR w KQkq -
+Ruy Lopez: modern Steinitz defense, Richter variation *
+rnbqk2r/ppp2ppp/8/1Bbp4/3NP1n1/2N5/PPP2PPP/R1BQK2R b KQkq -
+two knights defense: Pincus variation *
+rnbqk2r/ppp2ppp/8/2bPp3/2B3n1/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch gambit *
+rnbqk2r/ppp2ppp/8/2bPp3/5P2/3P3N/PPP3Pn/RNBQKB1R w KQkq -
+Philidor: L\'opez counter-gambit, Jaenisch variation *
+rnbqk2r/ppp2ppp/8/2bPp3/6n1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense, Perreux variation *
+rnbqk2r/ppp2ppp/8/2bp4/3NP1n1/2N5/PPP2PPP/R1BQKB1R w KQkq -
+two knights defense: Lolli attack *
+rnbqk2r/ppp2ppp/8/2bpp3/4P1n1/2PP4/PP1N1PPP/R1BQKBNR w KQkq -
+Philidor: Hanham, Kmoch variation *
+rnbqk2r/ppp3p1/8/2bppPPp/4nP2/8/PPPPQ2P/RNB1KBNR w KQkq -
+KGA: Kieseritsky, Salvio defense, Cozio variation *
+rnbqk2r/ppp3p1/8/3ppPPp/3b4/7P/PPP3K1/RNBQ1BNR w kq -
+KGA: Allgaier, Urusov attack *
+rnbqk2r/ppp3pp/5n2/2bppPP1/8/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Ghulam Kassim gambit *
+rnbqk2r/ppp3pp/5p2/3np3/1b2P3/3P1N2/PP3PPP/RNBQKB1R w KQkq -
+Sicilian: Prins variation, Venice attack *
+rnbqk2r/pppn1pp1/4p2p/3pP3/1b1P4/2N5/PPPB1PPP/R2QKBNR w KQkq -
+French: MacCutcheon, Tartakower variation
+rnbqk2r/pppnb1pp/4pp2/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR w KQkq -
+French: Albin-Alekhine-Ch\^atard attack, Teichmann variation
+rnbqk2r/pppnbppp/4p3/3pP1B1/3P3P/2N5/PPP2PP1/R2QKBNR b KQkq -
+French: Albin-Alekhine-Ch\^atard attack
+rnbqk2r/pppp1ppp/1b3n2/4p3/1PB1P3/P1N5/2PP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Graz variation *
+rnbqk2r/pppp1ppp/1b3n2/4p3/NP2P3/P7/2PP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Taimanov (chase/wing/accelerated counterthrust) variation *
+rnbqk2r/pppp1ppp/4pn2/6B1/1bPP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+Nimzo-Indian: Leningrad variation
+rnbqk2r/pppp1ppp/4pn2/8/1bP5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: Nimzo-English opening
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: Spielmann variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N1P3/PP3PPP/R1BQKBNR b KQkq -
+Nimzo-Indian: 4.e3
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Nimzo-Indian: three knights variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N2P2/PP2P1PP/R1BQKBNR b KQkq -
+Nimzo-Indian: Kmoch variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N3P1/PP2PP1P/R1BQKBNR b KQkq -
+Nimzo-Indian: Romanishin-Kasparov (Steiner) system
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Nimzo-Indian defense
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PPQ1PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: classical variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2NQ4/PP2PPPP/R1B1KBNR b KQkq -
+Nimzo-Indian: Mikenas attack
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+Bogo-Indian defense, Gr\"unfeld variation
+rnbqk2r/pppp1ppp/4pn2/8/1bPP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Bogo-Indian defense
+rnbqk2r/pppp1ppp/4pn2/8/2PP4/P1P5/4PPPP/R1BQKBNR b KQkq -
+Nimzo-Indian: S\"amisch variation
+rnbqk2r/pppp1ppp/5n2/1B2p3/1b2P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Alapin's defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Giuoco Piano *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Two knights defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+King's pawn game *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Hungarian defense *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: Italian variation *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Rousseau gambit *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+Philidor: L\'opez counter-gambit *
+rnbqk2r/pppp1ppp/5n2/2b1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+Latvian gambit, 3.Bc4 *
+rnbqk2r/pppp1ppp/5n2/3Np3/1b2P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Bird's defense *
+rnbqk2r/pppp1ppp/5n2/4P3/1bB2p2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+KGA: bishop's gambit, Paulsen attack
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P1P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: Brentano defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P1Q1/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Vienna: Zhuravlev countergambit
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Ruy Lopez: Berlin defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N2P2/PPPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Nuremberg variation *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: fianchetto (Smyslov/Barnes) defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez (Spanish opening) *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Ruy Lopez: Lucena defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2N5/PPPPQPPP/R1B1KBNR b KQkq -
+Ruy Lopez: Vinogradov variation *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2P3/2NP4/PPP2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: old Steinitz defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1b2PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Schliemann defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1bB1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: classical (Cordel) defense *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+Sicilian: Nimzovich-Rossolimo attack (with ...g6, without ...d6) *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen, Smyslov system
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian: Nimzovich-Rossolimo attack (without ...d6) *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/3P4/PP1BPPPP/RN1QKBNR b KQkq -
+Sicilian: Canal-Sokolsky attack, 3...Bd7 *
+rnbqk2r/pppp1ppp/5n2/4p3/1bP5/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack *
+rnbqk2r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1bPP/R1BQK1NR w KQkq -
+Giuoco Piano: Jerome gambit *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1PP4/2P2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense, exchange variation *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1b2N2/1PPP1PPP/R1BQKB1R w KQkq -
+Ruy Lopez: Treybal (Bayreuth) variation (exchange var. deferred) *
+rnbqk2r/pppp1ppp/5n2/4p3/4P3/P1b5/1PPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez: exchange variation *
+rnbqk2r/pppp1ppp/5n2/4p3/Nb2P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Pollock defense *
+rnbqk2r/pppp1ppp/5n2/b2Np3/4P3/P7/1PPP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Bird's defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/1P2P3/P1N5/2PP1PPP/R1BQKBNR b KQkq -
+Ruy Lopez: Caro variation *
+rnbqk2r/pppp1ppp/5n2/b3p3/2B1P3/P1N5/1PPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Classical defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N2N2/1PPP1PPP/R1BQKB1R b KQkq -
+Ruy Lopez: Morphy defense *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N3P1/1PPP1P1P/R1BQKBNR b KQkq -
+Ruy Lopez: fianchetto defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N5/1PPP1PPP/R1BQKBNR w KQkq -
+Ruy Lopez *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1N5/1PPPNPPP/R1BQKB1R b KQkq -
+Ruy Lopez: Cozio defense deferred *
+rnbqk2r/pppp1ppp/5n2/b3p3/4P3/P1NP4/1PP2PPP/R1BQKBNR b KQkq -
+Ruy Lopez: modern Steinitz defense *
+rnbqk2r/pppp1ppp/5n2/b3p3/4PP2/P1N5/1PPP2PP/R1BQKBNR b KQkq -
+Ruy Lopez: Schliemann defense deferred *
+rnbqk2r/pppp1ppp/5n2/bB2p3/4P3/P1N5/1PPP1PPP/R1BQK1NR b KQkq -
+Ruy Lopez: Alapin's defense deferred *
+rnbqk2r/pppp1ppp/8/2b1P3/3Pn3/8/PPP3PP/RNBQKBNR b KQkq -
+Latvian: Polerio variation *
+rnbqk2r/pppp1ppp/8/2b1P3/4n3/5N2/PPPP2PP/RNBQKB1R b KQkq -
+Latvian: corkscrew counter-gambit *
+rnbqk2r/pppp1ppp/8/2b1p3/2B1P1n1/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+two knights defense: Wilkes Barre (Traxler) variation *
+rnbqk2r/pppp1ppp/8/2b1p3/4P1n1/2N2N2/PPPP1PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/pppp1ppp/8/2b5/1P1pP1n1/2N2N2/P1P2PPP/R1BQKB1R b KQkq -
+two knights defense: Ulvestad variation *
+rnbqk2r/pppp1ppp/8/2b5/3NP3/2N5/PPP2nPP/R1BQKB1R w KQkq -
+two knights defense: Fegatello attack *
+rnbqk2r/pppp1ppp/8/2b5/N2pP1n1/5N2/PPP2PPP/R1BQKB1R b KQkq -
+two knights defense *
+rnbqk2r/pppp1ppp/8/2bN4/3pP1n1/5N2/PPP2PPP/R1BQKB1R b KQkq -
+two knights defense: Fritz variation *
+rnbqk2r/pppp1ppp/8/8/Nb1pP1n1/5N2/PPP2PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/pppp2p1/5n2/2b1pP1p/6P1/8/PPPP1PBP/RNBQK1NR w KQkq -
+KGA: Philidor gambit *
+rnbqk2r/pppp2p1/8/2b1pPPp/4n3/5N2/PPPP1P1P/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense, 6.Bc4 *
+rnbqk2r/pppp2p1/8/2b1pPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Walker attack *
+rnbqk2r/pppp2pp/4pn2/5p2/1bPP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Dutch defense: Dutch-Indian (Nimzo-Dutch) variation
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+KGA: Blachly gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: King's knight's gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/6P1/8/PPPP1PBP/RNBQK1NR b KQkq -
+King's knight's gambit *
+rnbqk2r/pppp2pp/5n2/2b1pP2/8/5N2/PPPPBPPP/RNBQK2R b KQkq -
+KGA: Cunningham, Euwe defense *
+rnbqk2r/pppp2pp/5n2/2b2P2/3N4/2P5/P4PPP/RNBQKB1R b KQkq -
+KGA: Abbazia defense, Botvinnik variation *
+rnbqk2r/pppp2pp/5n2/4pPP1/8/8/PPPP1b1P/RNBQKBNR w KQkq -
+KGA: Lolli gambit (wild Muzio gambit) *
+rnbqk2r/pppp2pp/8/2b1pPP1/4n3/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Salvio gambit *
+rnbqk2r/pppp3p/5np1/2b1pP1B/8/8/PPPP1PPP/RNBQK1NR w KQkq -
+KGA: Cunningham, Bertin gambit *
+rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP1BPPBP/RN1QK1NR w KQkq -
+Dutch-Indian, Alekhine variation
+rnbqk2r/ppppb1pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR w KQkq -
+Dutch defense
+rnbqk2r/ppppbppp/3n4/4p2Q/8/1BN5/PPPP1PPP/R1B1K1NR w KQkq -
+Vienna game
+rnbqk2r/ppppbppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Inverted Hungarian *
+rnbqk2r/ppppbppp/5n2/8/2B1Pp2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Cunningham, Euwe defense
+rnbqk2r/ppppbppp/7n/8/N3P3/2P2N1P/P4PP1/R1BQKB1R w KQkq -
+two knights defense: Steinitz variation *
+rnbqk2r/ppppbppp/8/4P3/N3n3/2P2N1P/P1Q2PP1/R1B1KB1R b KQkq -
+two knights defense: G\"oring variation *
+rnbqk2r/ppppbppp/8/8/N3P1n1/2P2N1P/P4PP1/R1BQKB1R b KQkq -
+Two knights defense *
+rnbqk2r/ppppbppp/8/8/N3P1n1/2P2N2/P4PPP/R1BQKB1R w KQkq -
+Two knights defense *
+rnbqk2r/ppppp1bp/5np1/5p2/2PP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Dutch: Leningrad, main variation
+rnbqk2r/ppppp2p/6pb/5P2/3P4/8/PPP2PPP/RN1QKBNR b KQkq -
+Amar gambit *
+rnbqk2r/ppppppbp/5np1/6B1/3P4/8/PPPNPPPP/R2QKBNR b KQkq -
+R\'eti: King's Indian attack, Keres variation *
+rnbqk2r/ppppppbp/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+R\'eti: King's Indian attack *
+rnbqk2r/ppppppbp/5np1/8/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+King's Indian: 4.e4
+rnbqkb1r/1p2pppp/p2p1n2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Najdorf, 6.Bg5
+rnbqkb1r/1p2pppp/p2p1n2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Najdorf, Lipnitzky attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: Najdorf, Byrne (English) attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Najdorf, Zagreb (fianchetto) variation
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N4P/PPP2PP1/R1BQKB1R b KQkq -
+Sicilian: Najdorf, Adams attack
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Najdorf, Opo\v censky variation
+rnbqkb1r/1p2pppp/p2p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Najdorf
+rnbqkb1r/1p2pppp/p2p1n2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: Najdorf, 6.f4
+rnbqkb1r/1p2pppp/p4n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: Petrosian system *
+rnbqkb1r/1p3p1p/p2ppnp1/8/2PNP3/3B4/PP3PPP/RNBQ1RK1 w kq -
+Sicilian: Kan, Gipslis variation
+rnbqkb1r/1p3ppp/p1p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R w KQkq -
+QGD semi-Slav: accelerated Meran (Alekhine variation)
+rnbqkb1r/1p3ppp/p2ppn2/6B1/3NP3/2N5/PPP2PPP/R2QKB1R w KQkq -
+Sicilian: Najdorf, 6...e6
+rnbqkb1r/1p3ppp/p2ppn2/6B1/3NPP2/2N5/PPP3PP/R2QKB1R b KQkq -
+Sicilian: Najdorf, 7.f4
+rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N1B3/PPPQ1PPP/R3KB1R b KQkq -
+Sicilian: Scheveningen, English variation
+rnbqkb1r/1p3ppp/p2ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R w KQkq -
+Sicilian: Scheveningen (Paulsen), classical variation
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP2QPPP/RNB2RK1 b kq -
+QGA: classical, 7.Qe2
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 w kq -
+QGA: classical, 6...a6
+rnbqkb1r/1p3ppp/p3pn2/2p5/2BPP3/5N2/PP3PPP/RNBQ1RK1 b kq -
+QGA: classical, Geller variation
+rnbqkb1r/1p3ppp/p3pn2/2p5/P1BP4/4PN2/1P3PPP/RNBQ1RK1 b kq -
+QGA: classical, Rubinstein variation
+rnbqkb1r/1p3ppp/p4n2/1N1pp1B1/Q1P5/2N5/PP2PPPP/R3KB1R b KQkq -
+QGD: Semi-Tarrasch, Krause variation
+rnbqkb1r/1pp1pppp/p4n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGA, Bogolyubov variation
+rnbqkb1r/1ppp1ppp/p3pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Dzindzikhashvili defense
+rnbqkb1r/2pp1ppp/p3pn2/1p6/2P5/5NP1/PP1PPPBP/RNBQK2R w KQkq -
+English: Romanishin gambit
+rnbqkb1r/3ppppp/P4n2/2pP4/8/8/PP2PPPP/RNBQKBNR b KQkq -
+Benk\"o gambit accepted
+rnbqkb1r/3ppppp/p4n2/1PpP4/8/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Benk\"o gambit: Zaitsev system
+rnbqkb1r/3ppppp/p4n2/1PpP4/8/8/PP2PPPP/RNBQKBNR w KQkq -
+Benk\"o gambit half accepted
+rnbqkb1r/4pppp/3p1n2/1NpP4/1pB1P3/8/PP3PPP/R1BQK1NR b KQkq -
+Benk\"o gambit: Nescaf\'e Frapp\'e attack
+rnbqkb1r/5ppp/p2ppn2/1p4B1/3NPP2/2N5/PPP3PP/R2QKB1R w KQkq -
+Sicilian: Najdorf, Polugayevsky variation
+rnbqkb1r/5ppp/p2ppn2/1p6/3NP3/1BN5/PPP2PPP/R1BQK2R w KQkq -
+Sicilian: Sozin with ...a6 and ...b5
+rnbqkb1r/5ppp/p3pn2/1pp5/2BP4/4PN2/PP2QPPP/RNB2RK1 w kq -
+QGA: classical, 7...b5
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2P5/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: Queens Indian formation
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP1B2/5N2/PP2PPPP/RN1QKB1R b KQkq -
+Queen's Indian: Miles variation
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Queen's Indian: 4.Nc3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+Queen's Indian: 4.e3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Queen's Indian defense
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/5NP1/PP2PP1P/RNBQKB1R b KQkq -
+Queen's Indian: 4.g3
+rnbqkb1r/p1pp1ppp/1p2pn2/8/2PP4/P4N2/1P2PPPP/RNBQKB1R b KQkq -
+Queen's Indian: Petrosian system
+rnbqkb1r/p1pp1ppp/5n2/1p2p3/2P5/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit deferred *
+rnbqkb1r/p1pp1ppp/5n2/1p4N1/2P1p3/2N5/PP1PPPPP/R1BQKB1R w KQkq -
+English: Bellon gambit
+rnbqkb1r/p1pp1ppp/5n2/1p6/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: Wing gambit *
+rnbqkb1r/p1pp2pp/5n2/1p2pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, Heath variation *
+rnbqkb1r/p1ppp1pp/1p3n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+Dutch: Staunton gambit, Nimzovich variation
+rnbqkb1r/p1pppp1p/5np1/1p1P4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+King's Indian: Danube gambit
+rnbqkb1r/p1pppp1p/5np1/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack, R\'eti-Smyslov variation *
+rnbqkb1r/p1pppppp/1p3n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's Indian accelerated
+rnbqkb1r/p1pppppp/1p3n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's Indian defense
+rnbqkb1r/p1pppppp/1p3n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: Nimzovich-Larsen attack *
+rnbqkb1r/p1pppppp/5n2/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Santasiere's folly *
+rnbqkb1r/p1pppppp/5n2/1p6/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack, Spassky's variation
+rnbqkb1r/p1pppppp/8/1p1nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Alekhine's defense: O'Sullivan gambit
+rnbqkb1r/p2n1ppp/1p2p3/2ppP3/3P4/2PB4/PP1N1PPP/R1BQK1NR w KQkq -
+French: Tarrasch, Botvinnik variation
+rnbqkb1r/p2p1pp1/5n1p/1ppP2B1/8/5N2/PP2PPPP/RN1QKB1R w KQkq -
+Blumenfeld counter-gambit, Spielmann variation
+rnbqkb1r/p2p1ppp/4pn2/1ppP2B1/2P5/5N2/PP2PPPP/RN1QKB1R b KQkq -
+Blumenfeld counter-gambit, Dus-Chotimursky variation
+rnbqkb1r/p2p1ppp/4pn2/1ppP4/2P5/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit
+rnbqkb1r/p2ppp1p/1p3np1/2p3B1/3P4/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: Torre defensive system *
+rnbqkb1r/p2ppp1p/1p3np1/2p5/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+English: London defensive system *
+rnbqkb1r/p2ppppp/1p3n2/2p3B1/3P4/2P5/PP2PPPP/RN1QKBNR b KQkq -
+English: Caro-Kann defensive system, Bogolyubov variation *
+rnbqkb1r/p2ppppp/1p3n2/2p5/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+English: Caro-Kann defensive system *
+rnbqkb1r/p2ppppp/5n2/1ppP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benk\"o gambit
+rnbqkb1r/p3pppp/2p2n2/1p2P3/2pP4/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: Tolush-Geller gambit
+rnbqkb1r/p3pppp/5n2/1ppP4/2p1P3/2N5/PP3PPP/R1BQKBNR w KQkq -
+QGA: Linares variation
+rnbqkb1r/p4p2/2p1p2p/1p1nP1N1/2pP3B/2N5/PP3PPP/R2QKB1R w KQkq -
+QGD semi-Slav: anti-Meran, Alatortsev system
+rnbqkb1r/p4p2/2p1pP1p/1p2N3/2pP3p/2N5/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Ekstrom variation
+rnbqkb1r/p4p2/2p1pn1p/1p2P1N1/2pP3B/2N5/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: anti-Meran gambit
+rnbqkb1r/p4ppp/2p5/3n4/2B2p2/5N2/PPPP2PP/RNBQK2R w KQkq -
+KGA: Abbazia defense, Botvinnik variation
+rnbqkb1r/p5pp/4pn2/1Ppp4/8/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Blumenfeld counter-gambit accepted
+rnbqkb1r/pp1n1ppp/4p3/2ppP3/3P1P2/2N2N2/PPP3PP/R1BQKB1R b KQkq -
+French: Steinitz variation
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen system, Keres variation
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Ponziani: Jaenisch counter-attack *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Ponziani opening *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPPBPPP/R1BQK1NR b KQkq -
+Ponziani: Romanishin variation *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4P3/2N5/PPPPNPPP/R1BQKB1R b KQkq -
+Ponziani: R\'eti variation *
+rnbqkb1r/pp1p1ppp/2p2n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Ponziani counter-gambit *
+rnbqkb1r/pp1p1ppp/2p2n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR w KQkq -
+KGA: bishop's gambit, Jaenisch variation
+rnbqkb1r/pp1p1ppp/2p5/3Nn3/1P1NP3/8/P1P2PPP/R1BQKB1R w KQkq -
+two knights defense: Fritz, Gruber variation *
+rnbqkb1r/pp1p1ppp/4pn2/2P5/8/4B3/PPP1PPPP/RN1QKBNR b KQkq -
+R\'eti accepted: Keres variation *
+rnbqkb1r/pp1p1ppp/4pn2/2p3B1/3PP3/5N2/PPP2PPP/RN1QKB1R b KQkq -
+Queen's pawn: Torre attack, Wagner gambit
+rnbqkb1r/pp1p1ppp/4pn2/2p5/2P1P3/2N5/PP1P1PPP/R1BQKBNR w KQkq -
+English: Mikenas-Carls, Sicilian variation
+rnbqkb1r/pp1p1ppp/4pn2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense
+rnbqkb1r/pp1p1ppp/4pn2/8/2PN4/8/PP2PPPP/RNBQKB1R w KQkq -
+English: symmetrical variation
+rnbqkb1r/pp1p1ppp/4pn2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Anderssen variation
+rnbqkb1r/pp1p1ppp/5n2/2p1N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Kaufmann attack *
+rnbqkb1r/pp1p1ppp/5n2/2p1p3/2P5/6PB/PP1PPP1P/RNBQK1NR b KQkq -
+Sicilian: Acton extension *
+rnbqkb1r/pp1p1ppp/5n2/2p1p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Dresden opening *
+rnbqkb1r/pp1p1ppp/5n2/2pPp3/2P5/8/PP2PPPP/RNBQKBNR w KQkq e6
+Czech Benoni defense
+rnbqkb1r/pp1p2pp/2p2n2/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, 4.c3 *
+rnbqkb1r/pp1p2pp/2p2n2/4pp2/2B1PP2/3P4/PPP3PP/RNBQK1NR b KQkq -
+KGD: classical counter-gambit *
+rnbqkb1r/pp1pp1pp/2p2n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+Dutch: Staunton gambit, Chigorin variation
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/2P1P3/PP3PPP/RNBQKBNR b KQkq -
+English: Kurajica defense *
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+English opening: Agincourt variation *
+rnbqkb1r/pp1ppp1p/5np1/2p5/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+English: Neo-Catalan *
+rnbqkb1r/pp1ppppp/1n6/2p1P3/8/1B1P4/PPP2PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Kmoch variation
+rnbqkb1r/pp1ppppp/2p2n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Caro-Masi defense
+rnbqkb1r/pp1ppppp/5n2/2P5/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti accepted *
+rnbqkb1r/pp1ppppp/5n2/2p1P3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+English, Nimzovich, Flohr variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: symmetrical variation
+rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+English: symmetrical, Benoni formation
+rnbqkb1r/pp1ppppp/5n2/2p5/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense
+rnbqkb1r/pp1ppppp/5n2/2p5/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+English opening: Agincourt variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti opening *
+rnbqkb1r/pp1ppppp/5n2/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Nimzovich-Rubinstein variation
+rnbqkb1r/pp1ppppp/5n2/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+English, Nimzovich variation *
+rnbqkb1r/pp1ppppp/5n2/2p5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English opening *
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Old Benoni defense
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti: advance variation *
+rnbqkb1r/pp1ppppp/5n2/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkb1r/pp1ppppp/5n2/3P4/2p5/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Hawk (Habichd) defense
+rnbqkb1r/pp1ppppp/8/2pP4/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -
+Vulture defense
+rnbqkb1r/pp2pp1p/2p2np1/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R w KQkq -
+English: Bled variation
+rnbqkb1r/pp2pp1p/2p2np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav\Gr\"unfeld: Schlechter variation
+rnbqkb1r/pp2pp1p/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Bronstein-Larsen variation
+rnbqkb1r/pp2pp1p/2pp1np1/8/3PP3/2N1B3/PPPQ1PPP/R3KBNR b KQkq -
+Pirc: 150 attack
+rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N1B3/PPP2PPP/R2QKB1R b KQkq -
+Sicilian: dragon, 6.Be3
+rnbqkb1r/pp2pp1p/3p1np1/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: dragon variation
+rnbqkb1r/pp2pp1p/3p1np1/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: dragon, Levenfish variation
+rnbqkb1r/pp2pp1p/5np1/2pP4/4p3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+QGD: Albin counter-gambit, 5.g3 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.g3 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/1P2PN2/PBPP1PPP/RN1QKB1R b KQkq -
+Queen's Indian: 4.g3 Bb7 *
+rnbqkb1r/pp2pp1p/5np1/2pp4/8/BP2PN2/P1PP1PPP/RN1QKB1R b KQkq -
+Queen's Indian: Nimzovich variation (exaggerated fianchetto) *
+rnbqkb1r/pp2pp1p/5np1/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...g6
+rnbqkb1r/pp2pp1p/6p1/2p3B1/2PPp3/8/PP1QPPPP/R3KBNR w KQkq -
+Gr\"unfeld: Lundin variation
+rnbqkb1r/pp2pppp/2p2n2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -
+Scandinavian gambit
+rnbqkb1r/pp2pppp/2p2n2/3p4/2P5/1P3N2/PB1PPPPP/RN1QKB1R b KQkq -
+English: Caro-Kann defensive system
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD Slav: 4.Nc3
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGD Slav: 4.e3
+rnbqkb1r/pp2pppp/2p2n2/3p4/2PP4/5N2/PP1NPPPP/R1BQKB1R b KQkq -
+QGD Slav: Breyer variation
+rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: 5.e3 (Alekhine variation)
+rnbqkb1r/pp2pppp/2p2n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD Slav accepted
+rnbqkb1r/pp2pppp/2p2n2/8/2pPP3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+QGD Slav: Slav gambit
+rnbqkb1r/pp2pppp/2p2n2/8/3PN3/3B4/PPP2PPP/R1BQK1NR b KQkq -
+Caro-Kann: Alekhine gambit
+rnbqkb1r/pp2pppp/2p2n2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R b KQkq -
+QGD Slav accepted: Alapin variation
+rnbqkb1r/pp2pppp/2pp1n2/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Pirc: Ufimtsev-Pytel variation
+rnbqkb1r/pp2pppp/3p1n2/2p5/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Cortlever (Alatortsev) variation
+rnbqkb1r/pp2pppp/3p1n2/2pP4/2P5/8/PP2PPPP/RNBQKBNR w KQkq -
+Benoni defense, Hromodka system
+rnbqkb1r/pp2pppp/3p1n2/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian
+rnbqkb1r/pp2pppp/3p1n2/8/3NP3/5P2/PPP3PP/RNBQKB1R b KQkq -
+Sicilian: Prins (Moscow) variation
+rnbqkb1r/pp2pppp/5n2/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R b KQkq -
+Bogo-Indian defense *
+rnbqkb1r/pp2pppp/5n2/2Pp4/1P6/8/P1P1PPPP/RNBQKBNR b KQkq -
+QGA: Ericson variation *
+rnbqkb1r/pp2pppp/5n2/2Pp4/3P4/8/PP3PPP/RNBQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik, Gunderam attack
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's gambit accepted *
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+QGA: 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2Pp4/8/P7/1PP1PPPP/RNBQKBNR b KQkq -
+QGA: Alekhine defense *
+rnbqkb1r/pp2pppp/5n2/2p3N1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Adler variation *
+rnbqkb1r/pp2pppp/5n2/2p5/1PPp4/4PN2/P2P1PPP/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit *
+rnbqkb1r/pp2pppp/5n2/2pP4/4p3/8/PPP2PPP/RNBQKBNR w KQkq -
+QGD: Albin counter-gambit *
+rnbqkb1r/pp2pppp/5n2/2pp4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English: symmetrical, Benoni formation *
+rnbqkb1r/pp2pppp/5n2/2pp4/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav: 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld defense *
+rnbqkb1r/pp2pppp/5n2/2pp4/5P2/4PN2/PPPP2PP/RNBQKB1R w KQkq -
+Bird's opening: Lasker variation
+rnbqkb1r/pp2pppp/5n2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R b KQkq -
+Queen's Indian defense *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian, 3.Nf3 *
+rnbqkb1r/pp2pppp/5n2/2pp4/8/P3PN2/1PPP1PPP/RNBQKB1R b KQkq -
+Dzindzikhashvili defense *
+rnbqkb1r/pp2pppp/5n2/2ppN3/8/4P3/PPPP1PPP/RNBQKB1R b KQkq -
+D\"ory defense *
+rnbqkb1r/pp2pppp/5n2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik attack
+rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav: exchange variation *
+rnbqkb1r/pp2pppp/5n2/3p4/3P4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: exchange variation
+rnbqkb1r/pp2pppp/5n2/8/1pPP4/4PN2/P5PP/RNBQKB1R b KQkq -
+Blumenfeld counter-gambit accepted *
+rnbqkb1r/pp2pppp/8/2pn4/8/2N2N2/PP1PPPPP/R1BQKB1R w KQkq -
+English: symmetrical, three knights system
+rnbqkb1r/pp2pppp/8/2pn4/8/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+English: symmetrical variation *
+rnbqkb1r/pp3p1p/2p1pnp1/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R w KQkq -
+QGD: Spielmann variation
+rnbqkb1r/pp3p1p/3p1np1/2pP2B1/8/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+Benoni: Uhlmann variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/4P3/2N2N2/PP3PPP/R1BQKB1R b KQkq -
+Benoni: classical with e4 and Nf3
+rnbqkb1r/pp3p1p/3p1np1/2pP4/4PP2/2N5/PP4PP/R1BQKBNR b KQkq -
+Benoni: pawn storm variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+Benoni defense
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N2NP1/PP2PP1P/R1BQKB1R b KQkq -
+Benoni: fianchetto variation
+rnbqkb1r/pp3p1p/3p1np1/2pP4/8/2N5/PP1NPPPP/R1BQKB1R b KQkq -
+Benoni: Nimzovich (knight's tour) variation
+rnbqkb1r/pp3p1p/3p1np1/2pPp3/2P1P3/2N5/PP3PPP/R1BQKBNR w KQkq -
+Czech Benoni: King's Indian system
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD semi-Slav: 5.e3
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD semi-Slav
+rnbqkb1r/pp3ppp/2p1pn2/3p4/2PP4/4PN2/PP1N1PPP/R1BQKB1R b KQkq -
+QGD Slav
+rnbqkb1r/pp3ppp/2p1pn2/6B1/2pP4/2N2N2/PP2PPPP/R2QKB1R w KQkq -
+QGD semi-Slav: 5.Bg5 dc
+rnbqkb1r/pp3ppp/2p1pn2/6B1/2pPP3/2N2N2/PP3PPP/R2QKB1R b KQkq -
+QGD semi-Slav: Botvinnik system (anti-Meran)
+rnbqkb1r/pp3ppp/2p1pn2/8/P1pP4/2N2N2/1P2PPPP/R1BQKB1R w KQkq -
+QGD Slav: Soultanb\'eieff variation
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/4P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Andreaschek gambit *
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch: G\"oring gambit *
+rnbqkb1r/pp3ppp/2p2n2/3Pp3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian: Tartakower variation *
+rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: exchange, positional line, 5...c6
+rnbqkb1r/pp3ppp/2p2n2/3p2B1/3P4/2N5/PPQ1PPPP/R3KBNR b KQkq -
+QGD: exchange, positional line, 6.Qc2
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/1Q2P3/PP1B1PPP/RN2KBNR b KQkq -
+French: advance, Wade variation *
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/2N1P3/PP1B1PPP/R2QKBNR b KQkq -
+French: advance, Euwe variation *
+rnbqkb1r/pp3ppp/2p2n2/3p4/2PPp3/2N1P3/PP3PPP/R1BQKBNR w KQkq -
+French: advance, Paulsen attack *
+rnbqkb1r/pp3ppp/2p2n2/3pp3/8/3P2P1/PPP1PPBP/RNBQK1NR w KQkq -
+Robatsch defense: Geller's system *
+rnbqkb1r/pp3ppp/2p2n2/4N3/2BpP3/2N5/PPPP1PPP/R1BQK2R b KQkq -
+Ponziani: Fraser defense *
+rnbqkb1r/pp3ppp/2p2n2/4p3/3pPP2/2NP4/PPP3PP/R1BQKBNR w KQkq -
+Ponziani counter-gambit, Schmidt attack *
+rnbqkb1r/pp3ppp/2p2p2/8/2BP4/8/PPP2PPP/R1BQK1NR b KQkq -
+Caro-Kann: Forg\'acs variation
+rnbqkb1r/pp3ppp/2p2p2/8/3P4/8/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Tartakower (Nimzovich) variation
+rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Venice attack
+rnbqkb1r/pp3ppp/3p1n2/1B2p3/3NP3/5P2/PPP3PP/RNBQK2R b KQkq -
+Sicilian: Prins variation, Venice attack
+rnbqkb1r/pp3ppp/3p1n2/2pP4/4P3/2N5/PP3PPP/R1BQKBNR b KQkq -
+Benoni: 6.e4
+rnbqkb1r/pp3ppp/3ppn2/1B6/3NP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Scheveningen, Vitoli\'n\'s variation
+rnbqkb1r/pp3ppp/3ppn2/8/2BNP3/2N5/PPP2PPP/R1BQK2R b KQkq -
+Sicilian: Sozin attack
+rnbqkb1r/pp3ppp/3ppn2/8/3NP1P1/2N5/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, Keres attack
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N3P1/PPP2P1P/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, fianchetto variation
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP1BPPP/R1BQK2R b KQkq -
+Sicilian: Scheveningen, 6.Be2
+rnbqkb1r/pp3ppp/3ppn2/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+Sicilian: Scheveningen variation
+rnbqkb1r/pp3ppp/3ppn2/8/3NPP2/2N5/PPP3PP/R1BQKB1R b KQkq -
+Sicilian: Scheveningen, 6.f4
+rnbqkb1r/pp3ppp/4p3/2pn4/3P4/2N1PN2/PP3PPP/R1BQKB1R b KQkq -
+QGD: Semi-Tarrasch with e3
+rnbqkb1r/pp3ppp/4pn2/2Pp2B1/8/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+QGA, Janowsky-Larsen variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/1P6/P7/2P1PPPP/RNBQKBNR b KQkq -
+QGA: Haberditz variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/4BN2/PPP1PPPP/RN1QKB1R b KQkq -
+QGA, Flohr variation *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+QGA: 4...e6 *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+QGA, 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/2Pp4/8/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+QGA, Smyslov variation *
+rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQ1RK1 b kq -
+QGA: classical variation, 6.O-O
+rnbqkb1r/pp3ppp/4pn2/2p5/2BP4/4PN2/PP3PPP/RNBQK2R w KQkq -
+QGA: classical variation
+rnbqkb1r/pp3ppp/4pn2/2pP2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: Semi-Tarrasch
+rnbqkb1r/pp3ppp/4pn2/2pP4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Semi-Tarrasch, 5.cd
+rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N2N2/PP2PPPP/R2QKB1R b KQkq -
+QGD: Semi-Tarrasch defense, Pillsbury variation
+rnbqkb1r/pp3ppp/4pn2/2pp2B1/2PP4/2N5/PP2PPPP/R2QKBNR w KQkq -
+QGD: Been-Koomen variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/2P5/1P2PN2/PB1P1PPP/RN1QKB1R b KQkq -
+English: Wimpey system
+rnbqkb1r/pp3ppp/4pn2/2pp4/2PP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: Semi-Tarrasch defense
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P1B2/2P2N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD Slav: 4.e3 Bf5 *
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P1BPN2/P1P2PPP/RNBQK2R b KQkq -
+Queen's pawn game, Rubinstein (Colle-Zukertort) variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/1P2PN2/P1PN1PPP/R1BQKB1R b KQkq -
+Queen's pawn game, Zukertort variation
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2P2N2/PP2PPPP/RNBQKB1R w KQkq -
+QGD Slav: 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/2pp4/3P4/2PBPN2/PP3PPP/RNBQK2R b KQkq -
+Colle system
+rnbqkb1r/pp3ppp/4pn2/2pp4/8/1P2PN2/P1PP1PPP/RNBQKB1R w KQkq -
+Queen's Indian: 4.e3 *
+rnbqkb1r/pp3ppp/4pn2/3p2B1/2PQ4/2N2N2/PP2PPPP/R3KB1R b KQkq -
+QGD: Semi-Tarrasch, Primitive Pillsbury variation
+rnbqkb1r/pp3ppp/4pn2/3p4/2PP4/2N5/PP3PPP/R1BQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack, 5...e6
+rnbqkb1r/pp3ppp/4pn2/8/2Bp4/4PN2/PP3PPP/RNBQ1RK1 w kq -
+QGA: classical, Steinitz variation
+rnbqkb1r/pp3ppp/5n2/2Ppp3/8/P7/1PP1PPPP/RNBQKBNR w KQkq -
+QGA: Alekhine defense, Borisenko-Furman variation *
+rnbqkb1r/pp3ppp/5n2/2p3B1/3pp3/1N1P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Vitolins attack *
+rnbqkb1r/pp3ppp/5n2/2pp2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Alekhine variation *
+rnbqkb1r/pp3ppp/5n2/2ppp1B1/8/3P2P1/PPP1PPBP/RN1QK1NR b KQkq -
+Robatsch defense: Rossolimo variation *
+rnbqkb1r/pp3ppp/8/2pnp3/8/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind *
+rnbqkb1r/pp3ppp/8/2pnp3/8/2N3P1/PP1PPPBP/R1BQK1NR b KQkq -
+Sicilian: accelerated fianchetto, Mar\'oczy bind, 5...Bg7 *
+rnbqkb1r/pp3ppp/8/2pnp3/8/P3P3/1P1P1PPP/RNBQKBNR w KQkq -
+Sicilian: Kan, Mar\'oczy bind (R\'eti variation) *
+rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/2NBPN2/PP3PPP/R1BQK2R w KQkq -
+QGD semi-Slav: stonewall defense
+rnbqkb1r/pp4pp/2p1p3/3p1p2/2PPn3/3BPN2/PP1N1PPP/R1BQK2R w KQkq -
+QGD: Stonewall variation
+rnbqkb1r/pp4pp/5n2/3p2B1/2p5/1NN1P3/PPP1P1PP/R2QKB1R w KQkq -
+Alekhine's defense: four pawns attack, Ilyin-Genevsky variation *
+rnbqkb1r/ppn1pppp/8/2p5/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: symmetrical, Rubinstein system
+rnbqkb1r/ppp1p1pp/5n2/3p4/8/3B3N/PPP2PPP/RNBQK2R w KQkq -
+Bird: From gambit, Lipke variation *
+rnbqkb1r/ppp1pp1p/1n1p2p1/4P3/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, fianchetto variation
+rnbqkb1r/ppp1pp1p/1n1p4/4P1p1/2PP1P2/8/PP4PP/RNBQKBNR w KQkq -
+Alekhine's defense: four pawns attack, Planinc variation
+rnbqkb1r/ppp1pp1p/1n4p1/8/8/2N3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: Anglo-Gr\"unfeld, Czech defense
+rnbqkb1r/ppp1pp1p/3p1np1/6B1/3PP3/2N5/PPP2PPP/R2QKBNR b KQkq -
+Pirc: Byrne variation
+rnbqkb1r/ppp1pp1p/3p1np1/8/2BPP3/2N5/PPP2PPP/R1BQK1NR b KQkq -
+Pirc: Holmov system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Pirc: classical (two knights) system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N3P1/PPP2P1P/R1BQKBNR b KQkq -
+Pirc: Sveshnikov system
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP1BPPP/R1BQK1NR b KQkq -
+Pirc defense
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Pirc defense
+rnbqkb1r/ppp1pp1p/3p1np1/8/3PPP2/2N5/PPP3PP/R1BQKBNR b KQkq -
+Pirc: Austrian attack
+rnbqkb1r/ppp1pp1p/3p2p1/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, fianchetto variation
+rnbqkb1r/ppp1pp1p/5np1/3P4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Scandinavian: Richter variation
+rnbqkb1r/ppp1pp1p/5np1/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+Gr\"unfeld: Stockholm variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq -
+Gr\"unfeld: 4.Bf4
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP2P1/2N5/PP2PP1P/R1BQKBNR b KQkq -
+Gr\"unfeld: Spike gambit
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/1QN5/PP2PPPP/R1B1KBNR b KQkq -
+Gr\"unfeld: Russian variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Gr\"unfeld: Three knights variation
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Neo-Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/5P2/PP2P1PP/RNBQKBNR w KQkq -
+Neo-Gr\"unfeld defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -
+Neo-Gr\"unfeld (Kemeri) defense
+rnbqkb1r/ppp1pp1p/5np1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: fianchetto without c4 *
+rnbqkb1r/ppp1pp1p/5np1/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA, Smyslov variation
+rnbqkb1r/ppp1pp1p/6p1/3n4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Gr\"unfeld: exchange variation
+rnbqkb1r/ppp1pp1p/6p1/8/8/2n3P1/PP1PPPBP/R1BQK1NR w KQkq -
+English: Anglo-Gr\"unfeld, Smyslov defense
+rnbqkb1r/ppp1pppp/1n1P4/8/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Alekhine's defense: exchange variation
+rnbqkb1r/ppp1pppp/1n1p4/4P3/2PP1P2/8/PP4PP/RNBQKBNR b KQkq -
+Alekhine's defense: four pawns attack
+rnbqkb1r/ppp1pppp/1n1p4/4P3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, Schmid variation
+rnbqkb1r/ppp1pppp/3p1n2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Old Indian defense
+rnbqkb1r/ppp1pppp/3p1n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: old Indian attack *
+rnbqkb1r/ppp1pppp/3p1n2/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Pirc defense
+rnbqkb1r/ppp1pppp/3p4/3nP3/2BP4/8/PPP2PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Balogh variation
+rnbqkb1r/ppp1pppp/3p4/3nP3/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern variation
+rnbqkb1r/ppp1pppp/3p4/3nP3/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/ppp1pppp/5n2/2P5/3p4/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Hawk (Habichd) defense *
+rnbqkb1r/ppp1pppp/5n2/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Scandinavian defense
+rnbqkb1r/ppp1pppp/5n2/3P4/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Scandinavian defense
+rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/2N5/PPP1PPPP/R2QKBNR b KQkq -
+Richter-Veresov attack
+rnbqkb1r/ppp1pppp/5n2/3p2B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Torre attack (Tartakower variation)
+rnbqkb1r/ppp1pppp/5n2/3p2B1/8/3P4/PPP1PPPP/RN1QKBNR b KQkq -
+Old Indian: Tartakower (Wade) variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English: Anglo-Gr\"unfeld defense
+rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn game, Krause variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Marshall defense
+rnbqkb1r/ppp1pppp/5n2/3p4/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Queen's bishop game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P2P1/5P2/PPP1P2P/RNBQKBNR b KQkq -
+Gedult attack
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+Queen's pawn game, Chigorin variation *
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/3BP3/PPP2PPP/RNBQK1NR b KQkq -
+Queen's pawn: stonewall attack
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game
+rnbqkb1r/ppp1pppp/5n2/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Blackmar-Diemer gambit
+rnbqkb1r/ppp1pppp/5n2/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -
+Blackmar-Diemer gambit
+rnbqkb1r/ppp1pppp/5n2/3p4/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Alekhine's defense: Scandinavian variation
+rnbqkb1r/ppp1pppp/5n2/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+Queen's Indian defense *
+rnbqkb1r/ppp1pppp/5n2/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+King's Indian: East Indian defense *
+rnbqkb1r/ppp1pppp/5n2/3pN3/8/8/PPPPPPPP/RNBQKB1R b KQkq -
+D\"ory defense *
+rnbqkb1r/ppp1pppp/5n2/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+Old Benoni defense *
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGA, 4.Nc3
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/4PN2/PP3PPP/RNBQKB1R b KQkq -
+QGA, 4.e3
+rnbqkb1r/ppp1pppp/5n2/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Queen's gambit accepted
+rnbqkb1r/ppp1pppp/5n2/8/Q1pP4/5N2/PP2PPPP/RNB1KB1R b KQkq -
+QGA: Mannheim variation
+rnbqkb1r/ppp1pppp/8/3n4/3P4/8/PPP2PPP/RNBQKBNR w KQkq -
+Scandinavian: Marshall variation
+rnbqkb1r/ppp1pppp/8/3n4/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English: Anglo-Gr\"unfeld defense
+rnbqkb1r/ppp1pppp/8/3np3/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern, Larsen variation
+rnbqkb1r/ppp1pppp/8/8/1nPP4/8/PP3PPP/RNBQKBNR w KQkq -
+Scandinavian: Kiel variation
+rnbqkb1r/ppp2Npp/3p1n2/8/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Cochrane gambit
+rnbqkb1r/ppp2p1p/5n2/3p4/4PpNP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense, Rivi\`ere variation
+rnbqkb1r/ppp2p1p/5n2/3pN3/3PPBpP/8/PPP3P1/RN1QKB1R b KQkq -
+KGA: Kieseritsky, Brentano defense
+rnbqkb1r/ppp2p1p/8/3pN3/3PnBpP/8/PPPN2P1/R2QKB1R b KQkq -
+KGA: Kieseritsky, Brentano defense, Caro variation
+rnbqkb1r/ppp2pp1/4pn1p/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R w KQkq -
+QGD: Capablanca-Duras variation
+rnbqkb1r/ppp2pp1/5n1p/3p2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R w KQkq -
+Alekhine's defense: modern, Panov variation *
+rnbqkb1r/ppp2ppp/1n6/1B2p3/8/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch: Romanishin variation *
+rnbqkb1r/ppp2ppp/1n6/4p3/2B5/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Scotch: Potter variation *
+rnbqkb1r/ppp2ppp/3p1n2/4N3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: French attack *
+rnbqkb1r/ppp2ppp/3p1n2/4P3/4P3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich variation
+rnbqkb1r/ppp2ppp/3p1n2/4p1N1/3PP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich, Locock variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2BPP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Philidor: Nimzovich, Klein variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+Old Indian: Ukrainian variation, 4.Nf3
+rnbqkb1r/ppp2ppp/3p1n2/4p3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Old Indian: Ukrainian variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich (Jaenisch) variation
+rnbqkb1r/ppp2ppp/3p1n2/4p3/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+R\'eti: Lisitsin gambit deferred *
+rnbqkb1r/ppp2ppp/3p1n2/8/2N1P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Paulsen attack
+rnbqkb1r/ppp2ppp/3p1n2/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: exchange variation
+rnbqkb1r/ppp2ppp/3p1n2/8/3P4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: classical attack, close variation
+rnbqkb1r/ppp2ppp/3p4/3QP3/4n3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Philidor: Nimzovich, Rellstab variation
+rnbqkb1r/ppp2ppp/3p4/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR w KQkq -
+Budapest: Alekhine variation, Balogh gambit
+rnbqkb1r/ppp2ppp/3p4/4P3/4n3/5N2/PPPN1PPP/R1BQKB1R b KQkq -
+Philidor: Nimzovich, Sokolsky variation
+rnbqkb1r/ppp2ppp/3p4/8/2P1n3/5N2/PP1P1PPP/RNBQKB1R b KQkq -
+Petrov: Kaufmann attack
+rnbqkb1r/ppp2ppp/3p4/8/3Pn3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: classical attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov: Nimzovich attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: French attack
+rnbqkb1r/ppp2ppp/3p4/8/4n3/5N2/PPPPQPPP/RNB1KB1R b KQkq -
+Petrov: Cozio (Lasker) attack
+rnbqkb1r/ppp2ppp/3pp3/2PnP3/2B5/2N5/PP1P1PPP/R1BQK1NR w KQkq -
+Alekhine's defense: two pawns' attack, Mikenas variation
+rnbqkb1r/ppp2ppp/4n3/3pP3/8/3P1Q2/PPP3PP/RNB1KBNR w KQkq -
+Latvian: Nimzovich variation *
+rnbqkb1r/ppp2ppp/4pn2/3P4/2P5/8/PP1P1PPP/RNBQKBNR w KQkq -
+Scandinavian: Icelandic gambit
+rnbqkb1r/ppp2ppp/4pn2/3P4/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+QGD: exchange variation
+rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: 4.Bg5
+rnbqkb1r/ppp2ppp/4pn2/3p2B1/2PP4/5N2/PP2PPPP/RN1QKB1R b KQkq -
+QGD
+rnbqkb1r/ppp2ppp/4pn2/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -
+English: Neo-Catalan
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP1B2/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: Harrwitz attack
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: 4.Nf3
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: 3...Nf6
+rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -
+Catalan: closed
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/3BPN2/PPP2PPP/RNBQK2R b KQkq -
+Queen's pawn game
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/4PN2/PPP2PPP/RNBQKB1R w KQkq -
+Queen's pawn game
+rnbqkb1r/ppp2ppp/4pn2/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N1B3/PPP2PPP/R2QKBNR b KQkq -
+French: Henneberger variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French defense
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/2NB4/PPP2PPP/R1BQK1NR b KQkq -
+French: Swiss variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, closed variation
+rnbqkb1r/ppp2ppp/4pn2/3p4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Queen's pawn: Yusupov-Rubinstein system *
+rnbqkb1r/ppp2ppp/4pn2/3pP3/2P5/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+English: Mikenas-Carls, Flohr variation
+rnbqkb1r/ppp2ppp/4pn2/3pP3/3P4/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Steinitz variation
+rnbqkb1r/ppp2ppp/4pn2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR w KQkq -
+French: Burn variation
+rnbqkb1r/ppp2ppp/4pn2/8/2p5/5NP1/PP1PPPBP/RNBQK2R w KQkq -
+English: Neo-Catalan accepted
+rnbqkb1r/ppp2ppp/4pn2/8/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA: 4...e6
+rnbqkb1r/ppp2ppp/4pn2/8/2pP4/5NP1/PP2PPBP/RNBQK2R b KQkq -
+Catalan: open, 5.Nf3
+rnbqkb1r/ppp2ppp/4pn2/8/3P4/2N2N2/PPP3PP/R1BQKB1R w KQkq -
+Blackmar-Diemer: Euwe defense
+rnbqkb1r/ppp2ppp/4pn2/8/Q1pP4/6P1/PP2PPBP/RNB1K1NR b KQkq -
+Catalan: open, 5.Qa4
+rnbqkb1r/ppp2ppp/5n2/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Morphy variation
+rnbqkb1r/ppp2ppp/5n2/3Np3/4P3/8/PPPP1PPP/R1BQKBNR b KQkq -
+Scotch: Lolli variation *
+rnbqkb1r/ppp2ppp/5n2/3P4/4PP2/8/PPP3PP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 5.de
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/2N5/PPPPQ1PP/R1B1KBNR b KQkq -
+KGD: Falkbeer, Rubinstein variation
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPP1Q1PP/RNB1KBNR b KQkq -
+KGD: Falkbeer, R\'eti variation
+rnbqkb1r/ppp2ppp/5n2/3P4/4pP2/3P4/PPPN2PP/R1BQKBNR b KQkq -
+KGD: Falkbeer, Keres variation
+rnbqkb1r/ppp2ppp/5n2/3P4/5p2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Abbazia defense, modern variation
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Sicilian *
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/5n2/3Pp3/8/4P3/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3Np3/3P4/PPP1PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: modern variation, 4...Bg4 *
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PP2PPPP/R2QKBNR b KQkq -
+QGD: exchange, positional line
+rnbqkb1r/ppp2ppp/5n2/3p2B1/3P4/2N5/PPP2PPP/R2QKBNR b KQkq -
+French: exchange, Svenonius variation
+rnbqkb1r/ppp2ppp/5n2/3p4/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Nimzovich system *
+rnbqkb1r/ppp2ppp/5n2/3p4/3NP3/8/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Larsen variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/3Np3/3P2P1/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: modern, fianchetto variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: modern variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/4p3/1N1P4/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense: modern, Schmid variation *
+rnbqkb1r/ppp2ppp/5n2/3p4/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: classical attack, close variation *
+rnbqkb1r/ppp2ppp/5n2/3pN3/4P3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: modern attack, Symmetrical variation *
+rnbqkb1r/ppp2ppp/5n2/3pN3/8/3P4/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: classical attack *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen, reverse dragon
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2P5/3P1N2/PP2PPPP/RNBQKB1R b KQkq -
+Sicilian: Cortlever (Alatortsev) variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/2PP4/4P3/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: Marshall variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Blackmar-Diemer: Lemberg counter-gambit
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch opening *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Nimzovich (Jaenisch) variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P4/PPP2PPP/RNBQKBNR w KQkq -
+Philidor's defense *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/3P4/PPPN1PPP/R1BQKBNR b KQkq -
+Philidor: Hanham variation *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: modern (Steinitz) attack *
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR w KQkq -
+Vienna gambit
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/2NP4/PPP3PP/R1BQKBNR b KQkq -
+Vienna gambit, Steinitz variation
+rnbqkb1r/ppp2ppp/5n2/3pp3/4PP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+Philidor: Philidor counter-gambit *
+rnbqkb1r/ppp2ppp/5n2/4p2Q/8/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Fraser attack *
+rnbqkb1r/ppp2ppp/5n2/4p3/4p3/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich variation *
+rnbqkb1r/ppp2ppp/8/3P4/4nP2/8/PPP1Q1PP/RNB1KBNR b KQkq -
+KGD: Falkbeer, Charousek gambit
+rnbqkb1r/ppp2ppp/8/3n4/3p4/8/PPP2PPP/RNBQKBNR w KQkq -
+Philidor: Paulsen attack *
+rnbqkb1r/ppp2ppp/8/3np2Q/8/2N5/PPPP1PPP/R1B1KBNR b KQkq -
+Scotch: Pulling counter-attack *
+rnbqkb1r/ppp2ppp/8/3np3/2B5/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Scotch game *
+rnbqkb1r/ppp2ppp/8/3np3/3P4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Sicilian: Nimzovich variation *
+rnbqkb1r/ppp2ppp/8/3np3/4P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+Sicilian: Labourdonnais-L\"owenthal variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N1P3/PP1P1PPP/R1BQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+Sicilian defense *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Scotch: Schmidt variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Scotch game *
+rnbqkb1r/ppp2ppp/8/3np3/8/2N5/PPQPPPPP/R1B1KBNR b KQkq -
+Sicilian: Flohr variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P2P1/PPP2P1P/RNBQKBNR b KQkq -
+Philidor: Larsen variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P4/PP2PPPP/RNBQKBNR w KQkq -
+Sicilian *
+rnbqkb1r/ppp2ppp/8/3np3/8/3P4/PPP2PPP/RNBQKBNR w KQkq -
+Philidor: exchange variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+Sicilian: Anderssen variation *
+rnbqkb1r/ppp2ppp/8/3np3/8/P3P3/1P1P1PPP/RNBQKBNR b KQkq -
+Sicilian: Kan variation *
+rnbqkb1r/ppp2ppp/8/3pP3/4n3/2N2Q2/PPPP2PP/R1B1KBNR b KQkq -
+Vienna gambit: Paulsen attack
+rnbqkb1r/ppp2ppp/8/3pP3/4n3/2NP4/PPP3PP/R1BQKBNR b KQkq -
+Vienna gambit
+rnbqkb1r/ppp2ppp/8/3pp3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R w KQkq -
+Boden-Kieseritsky gambit: Lichtenhein defense
+rnbqkb1r/ppp2ppp/8/3pp3/4N3/8/PPPP1PPP/R1BQKBNR w KQkq -
+Irish (Chicago) gambit *
+rnbqkb1r/ppp2ppp/8/3pp3/4P1n1/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Nimzovich, Locock variation *
+rnbqkb1r/ppp2ppp/8/4P3/3P2n1/4p3/PPP3PP/RNBQKBNR w KQkq -
+Philidor: Philidor counter-gambit, del Rio attack *
+rnbqkb1r/ppp2ppp/8/4p2Q/1n6/2N5/PPPP1PPP/R1B1KBNR w KQkq -
+Scotch: Horwitz attack *
+rnbqkb1r/ppp2ppp/8/4p3/1n2P3/2NP4/PP3PPP/R1BQKBNR b KQkq -
+Sicilian: Labourdonnais-L\"owenthal (Kalashnikov) variation *
+rnbqkb1r/ppp2ppp/8/4p3/1n6/2N1P3/PP1P1PPP/R1BQKBNR w KQkq -
+Sicilian, Sz\'en (`anti-Taimanov') variation *
+rnbqkb1r/ppp2ppp/8/4p3/8/2n3P1/PP1PPP1P/R1BQKBNR w KQkq -
+Sicilian: accelerated fianchetto, exchange variation *
+rnbqkb1r/ppp2ppp/8/8/4p3/2P2N2/P1PP1PPP/R1BQKB1R w KQkq -
+Scotch: Mieses variation *
+rnbqkb1r/ppp3p1/8/3ppPPp/8/7P/PPPP1K2/RNBQ1BNR w kq -
+KGA: Allgaier, Thorold variation *
+rnbqkb1r/ppp3pN/3p3n/5p2/2BpP3/8/PPP2PPP/RNBQK2R b KQkq -
+Philidor: L\'opez counter-gambit, Jaenisch variation
+rnbqkb1r/ppp3pp/5n2/3ppP2/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Rosentreter gambit *
+rnbqkb1r/ppp3pp/5p2/3np3/8/3P1N2/PP2PPPP/RNBQKB1R w KQkq -
+Sicilian: Prins (Moscow) variation *
+rnbqkb1r/ppp3pp/8/3pPp2/3Pn3/2N2Q2/PPP3PP/R1B1KBNR b KQkq -
+Vienna gambit: Heyde variation
+rnbqkb1r/ppp3pp/8/3pPp2/4n3/2N2Q2/PPPP2PP/R1B1KBNR w KQkq f6
+Vienna gambit: Bardeleben variation
+rnbqkb1r/ppp3pp/8/3ppPP1/4n3/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: S\o rensen gambit *
+rnbqkb1r/pppn1ppp/4p3/3pP3/3P2Q1/2N5/PPP2PPP/R1B1KBNR b KQkq -
+French: Steinitz, Gledhill attack
+rnbqkb1r/pppnpppp/4P3/3p4/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Alekhine's defense: Spielmann variation
+rnbqkb1r/pppp1p1p/5n2/4N3/2B1PppP/8/PPPP2P1/RNBQK2R b KQkq -
+KGA: Kieseritsky, Berlin defense, 6.Bc4
+rnbqkb1r/pppp1p1p/5n2/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Berlin defense
+rnbqkb1r/pppp1p1p/5n2/6N1/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Allgaier, Schlechter defense
+rnbqkb1r/pppp1p1p/5np1/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English: Bremen system with ...g6
+rnbqkb1r/pppp1p1p/5np1/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Konstantinopolsky opening *
+rnbqkb1r/pppp1ppp/2n5/8/2P1PP2/8/PP4PP/RNBQKBNR w KQkq -
+Budapest: Alekhine, Abonyi variation
+rnbqkb1r/pppp1ppp/4p3/8/2PPn3/5N2/PP2PPPP/RNBQKB1R w KQkq -
+D\"ory defense
+rnbqkb1r/pppp1ppp/4pn2/6B1/2PP4/8/PP2PPPP/RN1QKBNR b KQkq -
+Neo-Indian (Seirawan) attack
+rnbqkb1r/pppp1ppp/4pn2/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+Queen's pawn: Torre attack
+rnbqkb1r/pppp1ppp/4pn2/8/2P1P3/2N5/PP1P1PPP/R1BQKBNR b KQkq -
+English: Mikenas-Carls variation
+rnbqkb1r/pppp1ppp/4pn2/8/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English opening
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+Catalan opening
+rnbqkb1r/pppp1ppp/4pn2/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkb1r/pppp1ppp/4pn2/8/3P4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Queen's pawn: Yusupov-Rubinstein system
+rnbqkb1r/pppp1ppp/5n2/4p1B1/8/3P4/PPP1PPPP/RN1QKBNR b KQkq -
+R\'eti: Wade defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/2N5/PPPP1PPP/R1BQK1NR b KQkq -
+Vienna game
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Petrov: Italian variation
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Berlin defense
+rnbqkb1r/pppp1ppp/5n2/4p3/2B1PP2/8/PPPP2PP/RNBQK1NR b KQkq -
+Bishop's opening: Greco gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/2BPP3/8/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Ponziani gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/1P6/P2PPPPP/RNBQKBNR b KQkq -
+Sicilian: Katalimov variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR b KQkq -
+English: Carls' Bremen system
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR w KQkq -
+English opening
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Sicilian *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/4P3/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Sicilian: Nimzovich-Rubinstein variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/6P1/PP1PPP1P/RNBQKBNR b KQkq -
+Sicilian: Hungarian variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/8/PPQPPPPP/RNB1KBNR b KQkq -
+Sicilian: Quinteros variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2P5/P7/1P1PPPPP/RNBQKBNR b KQkq -
+Sicilian: O'Kelly variation *
+rnbqkb1r/pppp1ppp/5n2/4p3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest defense declined
+rnbqkb1r/pppp1ppp/5n2/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Tennison (Lemberg, Zukertort) gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Petrov: modern (Steinitz) attack
+rnbqkb1r/pppp1ppp/5n2/4p3/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+QP counter-gambit (elephant gambit) *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Petrov three knights game
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N3P1/PPPP1P1P/R1BQKBNR b KQkq -
+Vienna: Paulsen-Mieses variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+King's pawn game *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR w KQkq -
+Vienna: Falkbeer variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Philidor's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov's defense
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq -
+Damiano's defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+Greco defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's knight opening *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+Gunderam defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/4P3/P1N5/1PPP1PPP/R1BQKBNR b KQkq -
+Vienna: Mengarini variation
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Vienna gambit
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Latvian counter-gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: 2...Nf6
+rnbqkb1r/pppp1ppp/5n2/4p3/5P2/2N5/PPPPP1PP/R1BQKBNR b KQkq -
+KP: Colorado counter *
+rnbqkb1r/pppp1ppp/5n2/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+R\'eti: Pirc-Lisitsin gambit *
+rnbqkb1r/pppp1ppp/5n2/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+rnbqkb1r/pppp1ppp/5n2/4p3/Q1P5/8/PP1PPPPP/RNB1KBNR b KQkq -
+Sicilian: Stiletto (Althouse) variation *
+rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/2N5/PPPP2PP/R1BQK1NR b KQkq -
+KGA: bishop's gambit, Bogolyubov variation
+rnbqkb1r/pppp1ppp/5n2/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Cozio (Morphy) defense
+rnbqkb1r/pppp1ppp/5n2/8/2BpP3/5N2/PPP2PPP/RNBQK2R b KQkq -
+Bishop's opening/Petrov: Urusov gambit
+rnbqkb1r/pppp1ppp/5n2/8/3pP3/3B4/PPP2PPP/RNBQK1NR b KQkq -
+QP counter-gambit: Maroczy gambit *
+rnbqkb1r/pppp1ppp/5n2/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Schallop defense
+rnbqkb1r/pppp1ppp/8/2n1p3/8/3P1N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: Paulsen attack *
+rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Petrov: Damiano variation *
+rnbqkb1r/pppp1ppp/8/4N3/4n3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Petrov: Damiano variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1P1n1/8/PP3PPP/RNBQKBNR b KQkq -
+Budapest: Alekhine variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest: Fajarowicz variation
+rnbqkb1r/pppp1ppp/8/4P3/2P1n3/8/PPQ1PPPP/RNB1KBNR b KQkq -
+Budapest: Fajarowicz, Steiner variation
+rnbqkb1r/pppp1ppp/8/4P3/2P2Bn1/8/PP2PPPP/RN1QKBNR b KQkq -
+Budapest: Rubinstein variation
+rnbqkb1r/pppp1ppp/8/4P3/2P3n1/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Budapest: Adler variation
+rnbqkb1r/pppp1ppp/8/4P3/2P3n1/8/PP2PPPP/RNBQKBNR w KQkq -
+Budapest defense
+rnbqkb1r/pppp1ppp/8/4P3/3Qn3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Petrov: modern attack, main line
+rnbqkb1r/pppp1ppp/8/4P3/3pn3/5N2/PPP1QPPP/RNB1KB1R b KQkq -
+Petrov: modern attack, Steinitz variation
+rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N2N2/PPPP1PPP/R1BQK2R b KQkq -
+Boden-Kieseritsky gambit
+rnbqkb1r/pppp1ppp/8/4p3/2B1n3/2N5/PPPP1PPP/R1BQK1NR w KQkq -
+Vienna game
+rnbqkb1r/pppp1ppp/8/4p3/3Pn3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Petrov: modern attack, Symmetrical variation
+rnbqkb1r/pppp1ppp/8/4p3/4nP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+Latvian: Fraser defense *
+rnbqkb1r/pppp1ppp/8/4p3/8/3P1N2/PPP2nPP/RNBQKB1R w KQkq -
+Petrov: Cochrane gambit *
+rnbqkb1r/pppp2p1/5n2/4pP1p/6P1/8/PPPP1P1P/RNBQKBNR w KQkq -
+King's knight's gambit *
+rnbqkb1r/pppp2p1/8/4pPPp/3Pn3/8/PPP2P1P/RNBQKBNR b KQkq -
+KGA: Kieseritsky, Brentano (Campbell) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n2P/8/PPPP1P2/RNBQKBNR b KQkq -
+KGA: Kieseritsky, long whip (Stockwhip, classical) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/2N5/PPPP1P1P/R1BQKBNR b KQkq -
+KGA: Kieseritsky, Neumann defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/3P4/PPP2P1P/RNBQKBNR b KQkq -
+KGA: Kieseritsky, Kolisch defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/5N2/PPPP1P1P/RNBQKB1R b KQkq -
+KGA: Kieseritsky, Berlin defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPP1PBP/RNBQK1NR b KQkq -
+KGA: Kieseritsky, Paulsen defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPPBP1P/RNBQK1NR b KQkq -
+KGA: Kieseritsky, Polerio defense *
+rnbqkb1r/pppp2p1/8/4pPPp/4n3/8/PPPPQP1P/RNB1KBNR b KQkq -
+KGA: Kieseritsky, Salvio (Rosenthal) defense *
+rnbqkb1r/pppp2p1/8/4pPPp/6n1/5N2/PPPP1P1P/RNBQKB1R b KQkq -
+KGA: Allgaier, Schlechter defense *
+rnbqkb1r/pppp2p1/8/4pPPp/6n1/8/PPPP1P1P/RNBQKBNR w KQkq -
+KGA: Allgaier gambit *
+rnbqkb1r/pppp2p1/8/4pPnp/3P4/5N2/PPP2P1P/RNBQKB1R b KQkq -
+KGA: Kieseritsky, Berlin defense, Rivi\`ere variation *
+rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+Bird's opening: Lasker variation *
+rnbqkb1r/pppp2pp/4pn2/5p2/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq -
+Dutch defense
+rnbqkb1r/pppp2pp/4pn2/5p2/3P4/6PN/PPP1PPBP/RNBQK2R b KQkq -
+Dutch defense, Blackburne variation
+rnbqkb1r/pppp2pp/5n2/4N3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -
+Latvian: corkscrew counter-gambit
+rnbqkb1r/pppp2pp/5n2/4p3/2B1p3/3P4/PPP2PPP/RNBQK1NR w KQkq -
+KGD: classical, Soldatenkov variation *
+rnbqkb1r/pppp2pp/5n2/4pP2/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGA: Abbazia defense (classical defense, modern defense[!]) *
+rnbqkb1r/pppp2pp/5n2/4pP2/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGA: Gianutio counter-gambit *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/3P4/PPP2PPP/RNBQKBNR b KQkq -
+KGA: Fischer defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGA: Schallop defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/7P/PPPP1PP1/RNBQKBNR b KQkq -
+KGA: Becker defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's knight's gambit *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPPBPPP/RNBQK1NR b KQkq -
+KGA: Cunningham defense *
+rnbqkb1r/pppp2pp/5n2/4pP2/8/8/PPPPNPPP/RNBQKB1R b KQkq -
+KGA: Bonsch-Osmolovsky variation *
+rnbqkb1r/pppp2pp/5n2/4pp2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, Tartakower variation *
+rnbqkb1r/pppp2pp/5n2/5P2/3p4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+KGA: Abbazia defense, modern variation *
+rnbqkb1r/ppppnppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Keres variation (2.Ne2) *
+rnbqkb1r/ppppnppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alapin's opening *
+rnbqkb1r/ppppnppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Steinitz defense
+rnbqkb1r/ppppnppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Bonsch-Osmolovsky variation
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Dutch with c4 & Nc3
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+Dutch with c4 & g3
+rnbqkb1r/ppppp1pp/5n2/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Dutch defense
+rnbqkb1r/ppppp1pp/5n2/5p2/3P2P1/2N5/PPP1PP1P/R1BQKBNR b KQkq -
+Dutch, Spielmann gambit
+rnbqkb1r/ppppp1pp/5n2/5p2/4P3/3P1N2/PPP2PPP/RNBQKB1R b KQkq -
+R\'eti: Lisitsin gambit deferred
+rnbqkb1r/ppppp1pp/5n2/6B1/3Pp3/2N5/PPP2PPP/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Staunton's line
+rnbqkb1r/ppppp1pp/5n2/8/3Pp1P1/2N5/PPP2P1P/R1BQKBNR b KQkq -
+Dutch: Staunton gambit, Tartakower variation
+rnbqkb1r/ppppp1pp/5n2/8/4pPP1/2N5/PPPP3P/R1BQKBNR b KQkq -
+Bird's opening, Swiss gambit
+rnbqkb1r/ppppp1pp/5n2/8/6P1/3B4/PPP2P1P/RNBQK1NR b KQkq -
+Bird: From gambit, Lasker variation *
+rnbqkb1r/ppppp2p/5np1/5p2/2PP4/6P1/PP2PP1P/RNBQKBNR w KQkq -
+Dutch: Leningrad variation
+rnbqkb1r/ppppp2p/5np1/5p2/3P4/6P1/PPP1PPBP/RNBQK1NR w KQkq -
+Dutch defense
+rnbqkb1r/ppppp2p/5np1/6B1/3Pp2P/2N5/PPP2PP1/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Alekhine variation
+rnbqkb1r/ppppp2p/5np1/6B1/3Pp3/2N2P2/PPP3PP/R2QKBNR b KQkq -
+Dutch: Staunton gambit, Lasker variation
+rnbqkb1r/ppppp2p/5ppn/8/2PPP3/8/PP3PPP/RNBQKBNR w KQkq -
+Hippopotamus defense
+rnbqkb1r/ppppp2p/6pn/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+Dutch defense: Bladel variation
+rnbqkb1r/pppppp1p/5np1/3P4/2P5/8/PP2PPPP/RNBQKBNR b KQkq -
+King's Indian: Anti-Gr\"unfeld
+rnbqkb1r/pppppp1p/5np1/6B1/3P4/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+King's Indian: Torre attack
+rnbqkb1r/pppppp1p/5np1/8/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack, Spassky's variation *
+rnbqkb1r/pppppp1p/5np1/8/1P6/5NP1/P1PPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack, R\'eti-Smyslov variation
+rnbqkb1r/pppppp1p/5np1/8/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+King's Indian defense, 3.Nc3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+King's Indian, 3.Nf3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/6P1/PP2PP1P/RNBQKBNR b KQkq -
+King's Indian: 3.g3
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+R\'eti: King's Indian attack (with ...c5) *
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+King's Indian defense
+rnbqkb1r/pppppp1p/5np1/8/2PP4/8/PPQ1PPPP/RNB1KBNR b KQkq -
+Queen's pawn: Mengarini attack
+rnbqkb1r/pppppp1p/5np1/8/3P1B2/5N2/PPP1PPPP/RN1QKB1R b KQkq -
+King's Indian: London system
+rnbqkb1r/pppppp1p/5np1/8/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+King's Indian: East Indian defense
+rnbqkb1r/pppppp1p/5np1/8/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+King's Indian: fianchetto without c4
+rnbqkb1r/pppppp1p/5np1/8/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -
+R\'eti: King's Indian attack *
+rnbqkb1r/pppppp1p/5np1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+R\'eti: King's Indian attack (Barcza system) *
+rnbqkb1r/pppppp1p/5np1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Benko's opening: reversed Alekhine *
+rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack *
+rnbqkb1r/pppppp1p/5np1/8/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack
+rnbqkb1r/ppppppnp/6p1/4P3/3P2P1/8/PPP2P1P/RNBQKBNR w KQkq -
+Norwegian defense
+rnbqkb1r/pppppppp/1n6/2P1P3/8/8/PP1P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: two pawns' (Lasker's) attack
+rnbqkb1r/pppppppp/1n6/4P3/2P5/1P6/P2P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Steiner variation
+rnbqkb1r/pppppppp/5n2/6B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Trompovsky attack (Ruth, Opo\v censk\'y opening)
+rnbqkb1r/pppppppp/5n2/8/1PP5/8/P2PPPPP/RNBQKBNR b KQkq -
+English orang-utan
+rnbqkb1r/pppppppp/5n2/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Alekhine's defense: Krejcik variation
+rnbqkb1r/pppppppp/5n2/8/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English opening
+rnbqkb1r/pppppppp/5n2/8/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+English opening
+rnbqkb1r/pppppppp/5n2/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English, 1...Nf6 (Anglo-Indian defense)
+rnbqkb1r/pppppppp/5n2/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn: London system
+rnbqkb1r/pppppppp/5n2/8/3P1P2/8/PPP1P1PP/RNBQKBNR b KQkq -
+Canard opening
+rnbqkb1r/pppppppp/5n2/8/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -
+Queen's pawn: Bronstein gambit
+rnbqkb1r/pppppppp/5n2/8/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/3P4/5P2/PPP1P1PP/RNBQKBNR b KQkq -
+Paleface attack
+rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkb1r/pppppppp/5n2/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Mar\'oczy variation
+rnbqkb1r/pppppppp/5n2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/5n2/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+R\'eti v Dutch *
+rnbqkb1r/pppppppp/5n2/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+R\'eti: Herrstr\"om gambit *
+rnbqkb1r/pppppppp/5n2/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Indian variation
+rnbqkb1r/pppppppp/5n2/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/5n2/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkb1r/pppppppp/5n2/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+R\'eti opening *
+rnbqkb1r/pppppppp/7n/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -
+Polish: T\"ubingen variation
+rnbqkb1r/pppppppp/7n/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Amar (Paris) opening *
+rnbqkb1r/pppppppp/8/3nP3/2P5/8/PP1P1PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/3nP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/3nP3/8/1P6/P1PP1PPP/RNBQKBNR b KQkq -
+Alekhine's defense: Welling variation
+rnbqkb1r/pppppppp/8/3nP3/8/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Alekhine's defense: S\"amisch attack
+rnbqkb1r/pppppppp/8/3nP3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense
+rnbqkb1r/pppppppp/8/4P3/4n3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense: Mokele Mbembe (B\"ucker) variation
+rnbqkb1r/pppppppp/8/8/3Pn3/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+D\"ory defense
+rnbqkbnr/1p1p1p1p/p3p1p1/8/3NP3/3B4/PPP2PPP/RNBQK2R w KQkq -
+Sicilian: Kan, Swiss cheese variation
+rnbqkbnr/1p1p1ppp/p3p3/8/2PNP3/8/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Kan, Mar\'oczy bind (R\'eti variation)
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R b KQkq -
+Sicilian: Kan, 5.Nc3
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/3B4/PPP2PPP/RNBQK2R b KQkq -
+Sicilian: Kan, 5.Bd3
+rnbqkbnr/1p1p1ppp/p3p3/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Kan variation
+rnbqkbnr/1p1ppppp/p7/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: O'Kelly variation
+rnbqkbnr/1pp1pppp/p7/8/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGA: Alekhine defense
+rnbqkbnr/1pp1pppp/p7/8/2pPP3/5N2/PP3PPP/RNBQKB1R b KQkq -
+QGA: Alekhine defense, Borisenko-Furman variation
+rnbqkbnr/1pp2ppp/p3p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Janowski variation
+rnbqkbnr/1ppp1ppp/p3p3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+St. George defense
+rnbqkbnr/1ppp1ppp/p7/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Mengarini's opening *
+rnbqkbnr/1pppppp1/8/p6p/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Crab opening *
+rnbqkbnr/1pppppp1/p6p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Global opening *
+rnbqkbnr/1ppppppp/8/p7/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Corn stalk defense
+rnbqkbnr/1ppppppp/8/p7/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Ware (Meadow Hay) opening *
+rnbqkbnr/1ppppppp/p7/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+St. George (Baker) defense
+rnbqkbnr/1ppppppp/p7/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Anderssen's opening *
+rnbqkbnr/2p1pppp/p7/1p6/2pP4/4PN2/PP3PPP/RNBQKB1R w KQkq -
+QGA: Haberditz variation
+rnbqkbnr/2pp1ppp/P7/4p3/8/8/PP1PPPPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit, Carlsbad variation *
+rnbqkbnr/2pp1ppp/p7/1P2p3/8/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit, Marshall variation *
+rnbqkbnr/p1p1pppp/8/1p6/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+QGA: Ericson variation
+rnbqkbnr/p1p2ppp/1p2p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Alapin variation
+rnbqkbnr/p1pp1ppp/1p2p3/8/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Keres defense
+rnbqkbnr/p1pp1ppp/1p6/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: R\'eti (Spielmann) variation *
+rnbqkbnr/p1pp1ppp/1p6/8/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Welling variation *
+rnbqkbnr/p1pp1ppp/8/1p2p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit *
+rnbqkbnr/p1pp1ppp/8/1p6/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Bryan counter-gambit
+rnbqkbnr/p1pp2pp/1p6/4pP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Orsini gambit *
+rnbqkbnr/p1pppppp/1p6/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: Polish variation *
+rnbqkbnr/p1pppppp/1p6/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: English variation *
+rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: classical variation *
+rnbqkbnr/p1pppppp/1p6/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: English defense
+rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: modern variation *
+rnbqkbnr/p1pppppp/1p6/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Owen defense
+rnbqkbnr/p1pppppp/1p6/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: Dutch variation *
+rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack: symmetrical variation *
+rnbqkbnr/p1pppppp/1p6/8/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: symmetrical variation
+rnbqkbnr/p1pppppp/1p6/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Nimzovich-Larsen attack: Indian variation *
+rnbqkbnr/p1pppppp/1p6/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack *
+rnbqkbnr/p1pppppp/8/1p6/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Jaenisch gambit
+rnbqkbnr/p1pppppp/8/1p6/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Polish defense
+rnbqkbnr/p1pppppp/8/1p6/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Polish variation
+rnbqkbnr/p1pppppp/8/1p6/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Polish: Outflank variation *
+rnbqkbnr/p1pppppp/8/1p6/8/7N/PPPPPPPP/RNBQKB1R b KQkq -
+Polish: T\"ubingen variation *
+rnbqkbnr/p1pppppp/8/1p6/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Polish (Sokolsky) opening *
+rnbqkbnr/p2p1ppp/1p6/2p5/4p3/1N6/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Steiner variation *
+rnbqkbnr/p2p1ppp/8/1Pp1p3/8/8/PP1PPPPP/RNBQKBNR w KQkq c6
+Sicilian: wing gambit, Santasiere variation *
+rnbqkbnr/p2p1ppp/8/1pp5/2BpP3/5N2/PPP2PPP/RNBQK2R w KQkq -
+Center game, Kieseritsky variation
+rnbqkbnr/p2ppppp/1p6/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Katalimov variation
+rnbqkbnr/p2ppppp/8/1pp5/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+English orang-utan *
+rnbqkbnr/p3pppp/2p5/1p1p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Gurgenidze counter-attack
+rnbqkbnr/p4ppp/2p5/3pp3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense, Wheeler gambit *
+rnbqkbnr/p4ppp/8/1pP5/N2p4/8/PP2PPPP/R1BQKBNR w KQkq b6
+QGD: Tarrasch defense, Tarrasch gambit
+rnbqkbnr/pp1p1ppp/2p5/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Philidor counter-attack
+rnbqkbnr/pp1p1ppp/2p5/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Alapin's variation (2.c3) *
+rnbqkbnr/pp1p1ppp/2p5/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Lopez opening *
+rnbqkbnr/pp1p1ppp/2p5/8/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Ruy L\'opez defense
+rnbqkbnr/pp1p1ppp/4p3/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian defense
+rnbqkbnr/pp1p1ppp/4p3/2pP4/4P3/8/PPP2PPP/RNBQKBNR b KQkq -
+Old Benoni: Franco-Benoni defense
+rnbqkbnr/pp1p1ppp/4p3/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian defense
+rnbqkbnr/pp1p1ppp/8/2p1p3/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+Caro-Kann: anti-anti-Caro-Kann defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -
+English: Adorjan defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Mafia defense
+rnbqkbnr/pp1p1ppp/8/2p1p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: anti-Caro-Kann defense *
+rnbqkbnr/pp1p1ppp/8/2p1p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense, Steiner variation *
+rnbqkbnr/pp1p1ppp/8/2p5/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/pp1p1ppp/8/2p5/3p4/2P2N2/PP2PPPP/RNBQKB1R b KQkq -
+Scandinavian gambit *
+rnbqkbnr/pp1p1ppp/8/2p5/3p4/4PN2/PPP2PPP/RNBQKB1R b KQkq -
+Scandinavian: Icelandic gambit *
+rnbqkbnr/pp1p1ppp/8/2pPp3/8/8/PPP1PPPP/RNBQKBNR w KQkq e6
+Old Benoni defense
+rnbqkbnr/pp1p1ppp/8/4p3/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Andreaschek gambit
+rnbqkbnr/pp1p1ppp/8/8/2p1p3/1N6/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: two pawns' (Lasker's) attack *
+rnbqkbnr/pp1pp1pp/8/2p2p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Mujannah opening *
+rnbqkbnr/pp1pp1pp/8/2pP1p2/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni: Mujannah formation
+rnbqkbnr/pp1ppp1p/6p1/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian: Hungarian variation
+rnbqkbnr/pp1ppppp/2p5/8/1P6/8/P1PPPPPP/RNBQKBNR w KQkq -
+Polish: Outflank variation
+rnbqkbnr/pp1ppppp/2p5/8/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Caro-Kann: Hillbilly attack
+rnbqkbnr/pp1ppppp/2p5/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+Caro-Kann: anti-Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Caro-Kann defensive system
+rnbqkbnr/pp1ppppp/2p5/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: closed (Breyer) variation
+rnbqkbnr/pp1ppppp/2p5/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Caro-Kann defense
+rnbqkbnr/pp1ppppp/2p5/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Saragossa opening *
+rnbqkbnr/pp1ppppp/8/2p5/1P2P3/8/P1PP1PPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit
+rnbqkbnr/pp1ppppp/8/2p5/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+English: Jaenisch gambit *
+rnbqkbnr/pp1ppppp/8/2p5/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English: symmetrical variation
+rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+English: symmetrical variation *
+rnbqkbnr/pp1ppppp/8/2p5/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: symmetrical variation
+rnbqkbnr/pp1ppppp/8/2p5/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkbnr/pp1ppppp/8/2p5/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Sicilian: Smith-Morra gambit
+rnbqkbnr/pp1ppppp/8/2p5/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Sicilian: closed
+rnbqkbnr/pp1ppppp/8/2p5/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+Sicilian: Alapin's variation (2.c3)
+rnbqkbnr/pp1ppppp/8/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Sicilian defense
+rnbqkbnr/pp1ppppp/8/2p5/4P3/6P1/PPPP1P1P/RNBQKBNR b KQkq -
+Sicilian: Steinitz variation
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Sicilian defense
+rnbqkbnr/pp1ppppp/8/2p5/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -
+Sicilian: Keres variation (2.Ne2)
+rnbqkbnr/pp1ppppp/8/2p5/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Sicilian: Grand Prix attack
+rnbqkbnr/pp1ppppp/8/2p5/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+English: Anglo-Dutch defense *
+rnbqkbnr/pp1ppppp/8/2p5/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: English variation
+rnbqkbnr/pp1ppppp/8/2p5/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+English: Caro-Kann defensive system *
+rnbqkbnr/pp1ppppp/8/2p5/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+English, 1...Nf6 (Anglo-Indian defense) *
+rnbqkbnr/pp1ppppp/8/2p5/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/2p5/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+English opening *
+rnbqkbnr/pp1ppppp/8/8/1p2P3/P7/2PP1PPP/RNBQKBNR b KQkq -
+Sicilian: wing gambit, Marshall variation
+rnbqkbnr/pp1ppppp/8/8/1pP1P3/8/P2P1PPP/RNBQKBNR b KQkq c3
+Sicilian: wing gambit, Santasiere variation
+rnbqkbnr/pp1ppppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+Sicilian: Smith-Morra gambit
+rnbqkbnr/pp1ppppp/8/8/4P3/p7/2PP1PPP/RNBQKBNR w KQkq -
+Sicilian: wing gambit, Carlsbad variation
+rnbqkbnr/pp2p1pp/5p2/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld defense *
+rnbqkbnr/pp2pp1p/2p3p1/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+Caro-Kann: Gurgenidze system
+rnbqkbnr/pp2pp1p/3p2p1/2pP4/8/2N5/PPP1PPPP/R1BQKBNR w KQkq -
+Old Benoni: Schmid's system
+rnbqkbnr/pp2pp1p/6p1/2pp4/3P4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Neo-Gr\"unfeld (Kemeri) defense *
+rnbqkbnr/pp2pp1p/6p1/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R w KQkq -
+Dutch with c4 & g3 *
+rnbqkbnr/pp2pp1p/6p1/2pp4/5P2/5NP1/PPPPP2P/RNBQKB1R b KQkq -
+Dutch: Leningrad variation *
+rnbqkbnr/pp2pp1p/6p1/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R w KQkq -
+Catalan opening *
+rnbqkbnr/pp2pp1p/6p1/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: 3.g3 *
+rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PP2PPPP/RNBQKBNR b KQkq -
+QGD Slav defense: exchange variation
+rnbqkbnr/pp2pppp/2p5/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: exchange variation
+rnbqkbnr/pp2pppp/2p5/3p2P1/8/8/PPPPPPBP/RNBQK1NR b KQkq -
+Grob: spike attack
+rnbqkbnr/pp2pppp/2p5/3p4/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+Caro-Kann: anti-anti-Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/2P5/1P3N2/P2PPPPP/RNBQKB1R b KQkq -
+English: Caro-Kann defensive system
+rnbqkbnr/pp2pppp/2p5/3p4/2PP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD Slav: 3.Nf3
+rnbqkbnr/pp2pppp/2p5/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/5P2/PPP3PP/RNBQKBNR b KQkq -
+Caro-Kann: Tartakower (fantasy) variation
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -
+Caro-Kann: 3.Nd2
+rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+Caro-Kann: two knights variation
+rnbqkbnr/pp2pppp/2p5/3p4/4P3/2N2Q2/PPPP1PPP/R1B1KBNR b KQkq -
+Caro-Kann: Goldman (Spielmann) variation
+rnbqkbnr/pp2pppp/2p5/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Caro-Kann: advance variation
+rnbqkbnr/pp2pppp/2p5/8/2pPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD Slav defense, Alekhine variation
+rnbqkbnr/pp2pppp/2p5/8/3PN3/8/PPP2PPP/R1BQKBNR b KQkq -
+Caro-Kann defense
+rnbqkbnr/pp2pppp/2p5/8/3Pp3/2N2P2/PPP3PP/R1BQKBNR b KQkq -
+Caro-Kann: Rasa-Studier gambit
+rnbqkbnr/pp2pppp/3p4/1Bp5/4P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Sicilian: Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack
+rnbqkbnr/pp2pppp/3p4/2p5/1P2P3/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+Sicilian: wing gambit deferred
+rnbqkbnr/pp2pppp/3p4/2p5/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/3p4/2pP4/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+Old Benoni defense
+rnbqkbnr/pp2pppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/3p4/8/3QP3/5N2/PPP2PPP/RNB1KB1R b KQkq -
+Sicilian, Chekhover variation
+rnbqkbnr/pp2pppp/3p4/8/3pP3/2P2N2/PP3PPP/RNBQKB1R b KQkq -
+Sicilian: Tartakower variation
+rnbqkbnr/pp2pppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian
+rnbqkbnr/pp2pppp/8/1Bpp4/8/4P3/PPPP1PPP/RNBQK1NR b KQkq -
+Queen's pawn: Franco-Indian (Keres) defense *
+rnbqkbnr/pp2pppp/8/2Pp4/8/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's gambit accepted *
+rnbqkbnr/pp2pppp/8/2p1N3/2Pp4/8/PP1PPPPP/RNBQKB1R b KQkq -
+Vulture defense *
+rnbqkbnr/pp2pppp/8/2p1N3/4p3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest: Fajarowicz variation *
+rnbqkbnr/pp2pppp/8/2p3N1/4p3/8/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest defense *
+rnbqkbnr/pp2pppp/8/2p5/1P1p4/5NP1/P1PPPP1P/RNBQKB1R b KQkq -
+King's Indian: Danube gambit *
+rnbqkbnr/pp2pppp/8/2p5/1PPp4/5N2/P2PPPPP/RNBQKB1R b KQkq -
+Benk\"o gambit *
+rnbqkbnr/pp2pppp/8/2p5/2Pp4/3P1N2/PP2PPPP/RNBQKB1R b KQkq -
+Benoni defense, Hromodka system *
+rnbqkbnr/pp2pppp/8/2p5/2Pp4/4PN2/PP1P1PPP/RNBQKB1R b KQkq -
+Benoni defense *
+rnbqkbnr/pp2pppp/8/2p5/2PpP3/5N2/PP1P1PPP/RNBQKB1R b KQkq e3
+Czech Benoni defense *
+rnbqkbnr/pp2pppp/8/2p5/3p4/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+King's Indian: Anti-Gr\"unfeld *
+rnbqkbnr/pp2pppp/8/2pp4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Benoni defense *
+rnbqkbnr/pp2pppp/8/2pp4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+QGD: symmetrical (Austrian) defense *
+rnbqkbnr/pp2pppp/8/2pp4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: symmetrical (Austrian) defense
+rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+QGD: Grau (Sahovic) defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P1B2/8/PPP1PPPP/RN1QKBNR w KQkq -
+Queen's pawn, Mason variation, Steinitz counter-gambit
+rnbqkbnr/pp2pppp/8/2pp4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+QGD: Chigorin defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+QGD Slav defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+Queen's gambit declined *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+QGD: Marshall defense *
+rnbqkbnr/pp2pppp/8/2pp4/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Queen's pawn game, Krause variation
+rnbqkbnr/pp2pppp/8/2pp4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's gambit declined *
+rnbqkbnr/pp2pppp/8/2pp4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+QGD: Albin counter-gambit *
+rnbqkbnr/pp2pppp/8/2pp4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest defense declined *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/4P3/PPPP2PP/RNBQKBNR b KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/5N2/PPPPP1PP/RNBQKB1R b KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/1P2P3/P1PP1PPP/RNBQKBNR b KQkq -
+Queen's pawn: Keres defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+Queen's Indian accelerated *
+rnbqkbnr/pp2pppp/8/2pp4/8/2N2N2/PPPPPPPP/R1BQKB1R b KQkq -
+Kevitz-Trajkovich defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+Old Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -
+Old Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/4PN2/PPPP1PPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkbnr/pp2pppp/8/2pp4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn game *
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+King's Indian defense *
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack (with ...c5)
+rnbqkbnr/pp2pppp/8/2pp4/8/5NP1/PPPPPPBP/RNBQK2R b KQkq -
+R\'eti: King's Indian attack
+rnbqkbnr/pp2pppp/8/3p4/2PP4/8/PP3PPP/RNBQKBNR b KQkq -
+Caro-Kann: Panov-Botvinnik attack
+rnbqkbnr/pp2pppp/8/3p4/3p4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+QGD Slav defense: exchange variation *
+rnbqkbnr/pp2pppp/8/8/1pPp4/P4N2/3PPPPP/RNBQKB1R b KQkq -
+Benk\"o gambit half accepted *
+rnbqkbnr/pp2pppp/8/8/2Pp4/p4N2/3PPPPP/RNBQKB1R w KQkq -
+Benk\"o gambit accepted *
+rnbqkbnr/pp3ppp/2p1p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R w KQkq -
+English: Kurajica defense
+rnbqkbnr/pp3ppp/2p1p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: semi-Slav
+rnbqkbnr/pp3ppp/2p1p3/3p4/2PPP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: semi-Slav, Marshall gambit
+rnbqkbnr/pp3ppp/2p1p3/8/2pP4/2N2N2/PP2PPPP/R1BQKB1R w KQkq -
+QGD: semi-Slav, Noteboom variation
+rnbqkbnr/pp3ppp/2p5/3B4/4Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Anderssen variation
+rnbqkbnr/pp3ppp/2p5/3Pp3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+Danish gambit: S\o rensen defense *
+rnbqkbnr/pp3ppp/2p5/3Pp3/5P2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Nimzovich counter-gambit
+rnbqkbnr/pp3ppp/2p5/3Pp3/8/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Smith-Morra gambit *
+rnbqkbnr/pp3ppp/2p5/3Pp3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Danish gambit *
+rnbqkbnr/pp3ppp/2p5/3p4/2PPp3/2N1P3/PP3PPP/R1BQKBNR b KQkq -
+French: advance variation *
+rnbqkbnr/pp3ppp/2p5/3p4/2PPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance variation *
+rnbqkbnr/pp3ppp/2p5/3pp3/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD Slav: Winawer counter-gambit
+rnbqkbnr/pp3ppp/2pp4/4p3/2P5/2N3P1/PP1PPP1P/R1BQKBNR w KQkq -
+English, Keres variation
+rnbqkbnr/pp3ppp/3p4/2pPp3/4P3/8/PPP2PPP/RNBQKBNR w KQkq -
+Semi-Benoni (`blockade variation')
+rnbqkbnr/pp3ppp/4p3/2PpP3/8/8/PPP2PPP/RNBQKBNR b KQkq -
+French: advance, Steinitz variation
+rnbqkbnr/pp3ppp/4p3/2pp4/2PP4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch defense
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Marshall variation
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Sicilian: Marshall variation
+rnbqkbnr/pp3ppp/4p3/2pp4/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, open variation
+rnbqkbnr/pp3ppp/4p3/2pp4/4P3/2N3P1/PPPP1P1P/R1BQKBNR w KQkq -
+Sicilian: closed, Korchnoi variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/1P6/5N2/P1PP1PPP/RNBQKB1R b KQkq -
+French: Wing gambit
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P2Q1/8/PPP2PPP/RNB1KBNR b KQkq -
+French: advance, Nimzovich variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/2P5/PP3PPP/RNBQKBNR b KQkq -
+French: advance variation
+rnbqkbnr/pp3ppp/4p3/2ppP3/3P4/5N2/PPP2PPP/RNBQKB1R b KQkq -
+French: advance, Nimzovich system
+rnbqkbnr/pp3ppp/4p3/3P4/3p4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch, von Hennig-Schara gambit
+rnbqkbnr/pp3ppp/4p3/8/2Bp4/5N2/PPPN1PPP/R1BQK2R w KQkq -
+French: Tarrasch, Eliskases variation
+rnbqkbnr/pp3ppp/8/1Npp4/8/8/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian: Kiel variation *
+rnbqkbnr/pp3ppp/8/2Ppp3/5P2/8/PPP1P1PP/RNBQKBNR b KQkq -
+QGA: Schwartz defense *
+rnbqkbnr/pp3ppp/8/2Ppp3/8/8/PPP1PPPP/RNBQKBNR w KQkq -
+QGA: 3.e4 *
+rnbqkbnr/pp3ppp/8/2p1p1N1/4p3/3P4/PPP2PPP/RNBQKB1R b KQkq -
+Budapest: Alekhine variation, Balogh gambit *
+rnbqkbnr/pp3ppp/8/2p1p1N1/4p3/8/PPPP1PPP/RNBQKB1R w KQkq -
+Budapest: Alekhine variation *
+rnbqkbnr/pp3ppp/8/2pp4/3Np3/3P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/pp3ppp/8/2pp4/3P4/2N2N2/PP2PPPP/R1BQKB1R b KQkq -
+QGD: Tarrasch defense
+rnbqkbnr/pp3ppp/8/2pp4/3P4/2N5/PP2PPPP/R1BQKBNR w KQkq -
+QGD: Tarrasch defense, 4.cd ed
+rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Panov-Botvinnik attack *
+rnbqkbnr/pp3ppp/8/2pp4/3P4/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, open, 4.ed ed
+rnbqkbnr/pp3ppp/8/2pp4/3PP3/2N5/PP3PPP/R1BQKBNR b KQkq -
+QGD: Tarrasch defense, Marshall gambit
+rnbqkbnr/pp3ppp/8/2pp4/8/1N1p4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: exchange variation *
+rnbqkbnr/pp3ppp/8/2ppp3/5P2/4P3/PPPP2PP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit deferred *
+rnbqkbnr/pp3ppp/8/2ppp3/8/5PPN/PPPPP2P/RNBQKB1R b KQkq -
+Hippopotamus defense *
+rnbqkbnr/pp3ppp/8/3p4/2pP4/5N2/PP2PPPP/RNBQKB1R w KQkq -
+Caro-Kann: Panov-Botvinnik, Gunderam attack *
+rnbqkbnr/pp4pp/8/2p1pp2/8/2N5/PPPP1PPP/RNBQKB1R b KQkq -
+Budapest: Alekhine, Abonyi variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p1P1/1N1P4/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, Planinc variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p3/1N1P2P1/PPP1PP1P/RNBQKB1R b KQkq -
+Alekhine's defense: four pawns attack, fianchetto variation *
+rnbqkbnr/pp4pp/8/2pp1p2/4p3/1N1P4/PPP1PPPP/RNBQKB1R w KQkq -
+Alekhine's defense: four pawns attack *
+rnbqkbnr/pp4pp/8/2pp1p2/4pB2/1N1P4/PPP1PPPP/RN1QKB1R b KQkq -
+Alekhine's defense: four pawns attack, Trifunovi\'c variation *
+rnbqkbnr/pp4pp/8/2pp4/4p3/1NN5/PPP1PPPP/R1BQKB1R b KQkq -
+Alekhine's defense: four pawns attack, 6...Nc6 *
+rnbqkbnr/ppp1p1pp/3p4/5p2/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+(Dutch:) Balogh defense
+rnbqkbnr/ppp1p1pp/5p2/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Paleface attack *
+rnbqkbnr/ppp1p1pp/8/3p1p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Canard opening *
+rnbqkbnr/ppp1p1pp/8/5p2/2pPP3/8/PP3PPP/RNBQKBNR w KQkq -
+QGA: Schwartz defense
+rnbqkbnr/ppp1p2p/5p2/3p2p1/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Gedult attack *
+rnbqkbnr/ppp1pp1p/6p1/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch defense *
+rnbqkbnr/ppp1pp1p/6p1/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq -
+R\'eti: King's Indian attack
+rnbqkbnr/ppp1pp1p/8/3p2p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Krejcik gambit *
+rnbqkbnr/ppp1pp1p/8/3p2p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Queen's pawn: Bronstein gambit *
+rnbqkbnr/ppp1ppp1/7p/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch, Korchnoi attack *
+rnbqkbnr/ppp1pppp/3p4/8/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Old Indian defense
+rnbqkbnr/ppp1pppp/3p4/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's Pawn
+rnbqkbnr/ppp1pppp/3p4/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Mieses opening *
+rnbqkbnr/ppp1pppp/3p4/8/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/3p4/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Mieses opening *
+rnbqkbnr/ppp1pppp/8/3p2B1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Levitsky attack (Queen's bishop attack)
+rnbqkbnr/ppp1pppp/8/3p4/1P6/5N2/P1PPPPPP/RNBQKB1R b KQkq -
+Santasiere's folly
+rnbqkbnr/ppp1pppp/8/3p4/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Polish defense *
+rnbqkbnr/ppp1pppp/8/3p4/2P2P2/8/PP1PP1PP/RNBQKBNR b KQkq -
+Mujannah opening
+rnbqkbnr/ppp1pppp/8/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/8/3p4/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/3p4/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Queen's gambit declined
+rnbqkbnr/ppp1pppp/8/3p4/3P1B2/8/PPP1PPPP/RN1QKBNR b KQkq -
+Queen's pawn, Mason variation
+rnbqkbnr/ppp1pppp/8/3p4/3P4/2N5/PPP1PPPP/R1BQKBNR b KQkq -
+Queen's pawn: Chigorin variation
+rnbqkbnr/ppp1pppp/8/3p4/3P4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Queen's pawn game
+rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's pawn game *
+rnbqkbnr/ppp1pppp/8/3p4/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn game
+rnbqkbnr/ppp1pppp/8/3p4/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Blackmar gambit
+rnbqkbnr/ppp1pppp/8/3p4/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+Tennison (Lemberg, Zukertort) gambit
+rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Queen's pawn: Charlick (Englund) gambit *
+rnbqkbnr/ppp1pppp/8/3p4/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Scandinavian (center counter) defense
+rnbqkbnr/ppp1pppp/8/3p4/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+Bird's opening: Williams gambit
+rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Dutch *
+rnbqkbnr/ppp1pppp/8/3p4/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird's opening
+rnbqkbnr/ppp1pppp/8/3p4/8/1P3N2/P1PPPPPP/RNBQKB1R b KQkq -
+R\'eti: Nimzovich-Larsen attack
+rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Queen's pawn: English defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: classical variation
+rnbqkbnr/ppp1pppp/8/3p4/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+Queen's pawn: Lundin (Kevitz-Mikenas) defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+R\'eti: old Indian attack
+rnbqkbnr/ppp1pppp/8/3p4/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's Pawn *
+rnbqkbnr/ppp1pppp/8/3p4/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+Queen's pawn *
+rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Queen's pawn game *
+rnbqkbnr/ppp1pppp/8/3p4/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti opening
+rnbqkbnr/ppp1pppp/8/3p4/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+R\'eti: King's Indian attack (Barcza system)
+rnbqkbnr/ppp1pppp/8/3p4/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Modern defense *
+rnbqkbnr/ppp1pppp/8/3p4/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Queen's pawn *
+rnbqkbnr/ppp1pppp/8/8/2Pp1P2/8/PP1PP1PP/RNBQKBNR b KQkq -
+Old Benoni: Mujannah formation *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/3P4/PP2PPPP/RNBQKBNR b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2Pp4/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+R\'eti: advance variation
+rnbqkbnr/ppp1pppp/8/8/2PpP3/8/PP1P1PPP/RNBQKBNR b KQkq e3
+Old Benoni defense *
+rnbqkbnr/ppp1pppp/8/8/2p5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+R\'eti accepted
+rnbqkbnr/ppp1pppp/8/8/2pP4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGA: 3.Nf3
+rnbqkbnr/ppp1pppp/8/8/2pP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's gambit accepted
+rnbqkbnr/ppp1pppp/8/8/2pPP3/8/PP3PPP/RNBQKBNR b KQkq -
+QGA: 3.e4
+rnbqkbnr/ppp2p1p/3p2p1/8/3NP3/8/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Larsen variation
+rnbqkbnr/ppp2p1p/3p4/4N3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Kolisch defense
+rnbqkbnr/ppp2p1p/8/3p2p1/4p3/6P1/PPPPPPNP/RNBQKB1R b KQkq -
+Norwegian defense *
+rnbqkbnr/ppp2p1p/8/3p4/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 w kq -
+KGA: Muzio gambit, Brentano defense
+rnbqkbnr/ppp2p1p/8/3pN3/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, Brentano (Campbell) defense
+rnbqkbnr/ppp2ppp/3p4/4p3/2P5/2N2N2/PP1PPPPP/R1BQKB1R b KQkq -
+English opening
+rnbqkbnr/ppp2ppp/3p4/4p3/3PP3/5N2/PPP2PPP/RNBQKB1R b KQkq -
+Philidor's defense
+rnbqkbnr/ppp2ppp/3p4/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Philidor's defense
+rnbqkbnr/ppp2ppp/3p4/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: Indian opening *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann: closed (Breyer) variation *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: King's Indian attack *
+rnbqkbnr/ppp2ppp/3p4/4p3/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense: Mar\'oczy variation *
+rnbqkbnr/ppp2ppp/3p4/8/3NP3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: exchange variation
+rnbqkbnr/ppp2ppp/3p4/8/3pP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: exchange variation
+rnbqkbnr/ppp2ppp/3p4/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Fischer defense
+rnbqkbnr/ppp2ppp/3pp3/8/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Lengfellner system
+rnbqkbnr/ppp2ppp/4p3/3P4/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+French: exchange variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English opening: Agincourt variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2P5/5NP1/PP1PPP1P/RNBQKB1R b KQkq -
+English opening: Agincourt variation
+rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+QGD: 3.Nc3
+rnbqkbnr/ppp2ppp/4p3/3p4/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Queen's gambit declined
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/2N5/PPP2PPP/R1BQKBNR b KQkq -
+French: Paulsen variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/3B4/PPP2PPP/RNBQK1NR b KQkq -
+French: Schlechter variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/4B3/PPP2PPP/RN1QKBNR b KQkq -
+French: Alapin variation
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPP2PPP/RNBQKBNR w KQkq -
+French defense
+rnbqkbnr/ppp2ppp/4p3/3p4/3PP3/8/PPPN1PPP/R1BQKBNR b KQkq -
+French: Tarrasch
+rnbqkbnr/ppp2ppp/4p3/3p4/4P3/2N2N2/PPPP1PPP/R1BQKB1R b KQkq -
+French: Two knights variation
+rnbqkbnr/ppp2ppp/4p3/3p4/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+French: Pelikan variation
+rnbqkbnr/ppp2ppp/4p3/3pP3/3P4/8/PPP2PPP/RNBQKBNR b KQkq -
+French: advance variation
+rnbqkbnr/ppp2ppp/4p3/8/3Pp3/2N5/PPP2PPP/R1BQKBNR w KQkq -
+French: Rubinstein variation
+rnbqkbnr/ppp2ppp/8/1B1P4/4pP2/8/PPPP2PP/RNBQK1NR b KQkq -
+KGD: Falkbeer, Nimzovich variation
+rnbqkbnr/ppp2ppp/8/3P4/3N4/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Paulsen attack
+rnbqkbnr/ppp2ppp/8/3P4/4pP2/3P4/PPP3PP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 4.d3
+rnbqkbnr/ppp2ppp/8/3P4/4pP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Falkbeer, 3...e4
+rnbqkbnr/ppp2ppp/8/3Pp3/5P2/8/PPPP2PP/RNBQKBNR b KQkq -
+KGD: Falkbeer counter-gambit
+rnbqkbnr/ppp2ppp/8/3Pp3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+Center game *
+rnbqkbnr/ppp2ppp/8/3p4/1P1Np3/8/P1PPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense: O'Sullivan gambit *
+rnbqkbnr/ppp2ppp/8/3p4/2B1P3/8/PB3PPP/RN1QK1NR w KQkq -
+Danish gambit: Schlechter defense
+rnbqkbnr/ppp2ppp/8/3p4/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, Bledow variation
+rnbqkbnr/ppp2ppp/8/3p4/3N4/8/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian: Marshall variation *
+rnbqkbnr/ppp2ppp/8/3p4/3Np3/3P4/PPP1PPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/ppp2ppp/8/3p4/3Np3/8/PPPPPPPP/RNBQKB1R w KQkq -
+Alekhine's defense *
+rnbqkbnr/ppp2ppp/8/3p4/3Pp3/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: advance variation *
+rnbqkbnr/ppp2ppp/8/3p4/3Pp3/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: advance variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: exchange variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/4P3/PPP2PPP/RNBQKBNR w KQkq -
+French: exchange variation *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Scandinavian defense *
+rnbqkbnr/ppp2ppp/8/3p4/3p4/5NP1/PPP1PP1P/RNBQKB1R b KQkq -
+Scandinavian: Richter variation *
+rnbqkbnr/ppp2ppp/8/3p4/3pP3/2P5/PP3PPP/RNBQKBNR w KQkq -
+Danish gambit: S\o rensen defense
+rnbqkbnr/ppp2ppp/8/3p4/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Abbazia defense (classical defense, modern defense[!])
+rnbqkbnr/ppp2ppp/8/3pP3/8/8/PPPPP1PP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Smith-Morra gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+QGD: Albin counter-gambit
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR b KQkq -
+Caro-Kann defense *
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/4P3/PPP2PPP/RNBQKBNR b KQkq -
+French defense *
+rnbqkbnr/ppp2ppp/8/3pp3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Blackmar gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+QP counter-gambit (elephant gambit)
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+KGD: Falkbeer, Milner-Barry variation
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/5N2/PPPP2PP/RNBQKB1R b KQkq -
+KGD: Falkbeer, Tartakower variation
+rnbqkbnr/ppp2ppp/8/3pp3/4PP2/8/PPPP2PP/RNBQKBNR w KQkq -
+KGD: Falkbeer counter-gambit
+rnbqkbnr/ppp2ppp/8/3pp3/5P2/3P4/PPP1P1PP/RNBQKBNR b KQkq -
+(Dutch:) Balogh defense *
+rnbqkbnr/ppp2ppp/8/3pp3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2N2P2/PPPPP1PP/R1BQKBNR b KQkq -
+KP: Neo-Mongoloid defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+KP: Nimzovich defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2P2N2/PP1PPPPP/RNBQKB1R b KQkq -
+Caro-Masi defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/2P5/PP1PPPPP/RNBQKBNR w KQkq -
+Caro-Kann defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/3P1N2/PPP1PPPP/RNBQKB1R b KQkq -
+Pirc defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/3PP3/PPP2PPP/RNBQKBNR b KQkq -
+Lengfellner system *
+rnbqkbnr/ppp2ppp/8/3pp3/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -
+Fried fox defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/6P1/PPPPPPBP/RNBQK1NR b KQkq -
+Robatsch (modern) defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/BP6/P1PPPPPP/RN1QKBNR b KQkq -
+Guatemala defense *
+rnbqkbnr/ppp2ppp/8/3pp3/8/P3P3/1PPP1PPP/RNBQKBNR b KQkq -
+St. George defense *
+rnbqkbnr/ppp2ppp/8/4P3/2Pp4/5N2/PP2PPPP/RNBQKB1R b KQkq -
+QGD: Albin counter-gambit
+rnbqkbnr/ppp2ppp/8/4p3/2Pp4/4P3/PP1P1PPP/RNBQKBNR w KQkq -
+Old Benoni: Franco-Benoni defense *
+rnbqkbnr/ppp2ppp/8/4p3/2PpP3/3P4/PP3PPP/RNBQKBNR b KQkq -
+Semi-Benoni (`blockade variation') *
+rnbqkbnr/ppp2ppp/8/8/2pPp3/4P3/PP3PPP/RNBQKBNR w KQkq -
+French: advance, Steinitz variation *
+rnbqkbnr/ppp3pp/3p4/4Pp2/3p4/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer, 4.d3 *
+rnbqkbnr/ppp3pp/3p4/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R w KQkq -
+Philidor: L\'opez counter-gambit
+rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/2N2N2/PPP2PPP/R1BQKB1R b KQkq -
+Philidor: Philidor counter-gambit, Zukertort variation
+rnbqkbnr/ppp3pp/3p4/4pp2/3PP3/5N2/PPP2PPP/RNBQKB1R w KQkq -
+Philidor: Philidor counter-gambit
+rnbqkbnr/ppp3pp/4P3/3p2N1/4p3/8/PPP2PPP/RNBQKB1R b KQkq -
+Philidor: Philidor counter-gambit, del Rio attack
+rnbqkbnr/ppp3pp/4p3/3p1p2/3PP3/8/PPPN1PPP/R1BQKBNR w KQkq -
+French: Tarrasch, Haberditz variation
+rnbqkbnr/ppp3pp/5p2/3pp3/3P4/2P5/PP2PPPP/RNBQKBNR w KQkq -
+Caro-Kann: Tartakower (fantasy) variation *
+rnbqkbnr/ppp3pp/5p2/3pp3/3P4/5N2/PPP1PPPP/RNBQKB1R w KQkq -
+Blackmar-Diemer gambit *
+rnbqkbnr/ppp3pp/8/3Ppp2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Halasz gambit *
+rnbqkbnr/ppp3pp/8/3pN3/2B1p3/8/PPPP1PPP/RNBQK2R w KQkq -
+Latvian: Polerio variation
+rnbqkbnr/ppp3pp/8/3ppP2/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Villemson (Steinitz) gambit *
+rnbqkbnr/ppp3pp/8/3ppp2/8/6P1/PPPPPPBP/RNBQK1NR w KQkq -
+Robatsch defense: three pawns attack *
+rnbqkbnr/ppp3pp/8/4pp2/3p4/5N2/PPP2PPP/RNBQKB1R w KQkq -
+KGD: Falkbeer, 5.de *
+rnbqkbnr/pppp1B1p/8/8/4Ppp1/5N2/PPPP2PP/RNBQK2R b KQkq -
+KGA: Lolli gambit (wild Muzio gambit)
+rnbqkbnr/pppp1p1p/6p1/4p3/2P1P3/8/PP1P1PPP/RNBQKBNR w KQkq -
+English: Adorjan defense
+rnbqkbnr/pppp1p1p/6p1/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Steinitz variation *
+rnbqkbnr/pppp1p1p/8/4N3/2B1Ppp1/8/PPPP2PP/RNBQK2R b KQkq -
+KGA: Salvio gambit
+rnbqkbnr/pppp1p1p/8/4N3/3PPpp1/8/PPP3PP/RNBQKB1R b KQkq -
+KGA: S\o rensen gambit
+rnbqkbnr/pppp1p1p/8/6N1/4PppP/8/PPPP2P1/RNBQKB1R b KQkq -
+KGA: Allgaier gambit
+rnbqkbnr/pppp1p1p/8/6p1/2B1Pp2/5N2/PPPP2PP/RNBQK2R b KQkq -
+KGA: King's knight's gambit
+rnbqkbnr/pppp1p1p/8/6p1/3PPp2/5N2/PPP3PP/RNBQKB1R b KQkq -
+KGA: Rosentreter gambit
+rnbqkbnr/pppp1p1p/8/6p1/4Pp1P/5N2/PPPP2P1/RNBQKB1R b KQkq -
+King's knight's gambit
+rnbqkbnr/pppp1p1p/8/6p1/4Pp2/2N2N2/PPPP2PP/R1BQKB1R b KQkq -
+KGA: Quaade gambit
+rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/2N2N2/PPPP2PP/R1BQK2R b KQkq -
+KGA: MacDonnell gambit
+rnbqkbnr/pppp1p1p/8/8/2B1Ppp1/5N2/PPPP2PP/RNBQ1RK1 b kq -
+KGA: Muzio gambit
+rnbqkbnr/pppp1p1p/8/8/2BPPpp1/5N2/PPP3PP/RNBQK2R b KQkq -
+KGA: Ghulam Kassim gambit
+rnbqkbnr/pppp1p2/8/4N2p/4PppP/8/PPPP2P1/RNBQKB1R w KQkq -
+KGA: Kieseritsky, long whip (Stockwhip, classical) defense
+rnbqkbnr/pppp1pp1/7p/8/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Becker defense
+rnbqkbnr/pppp1ppp/4p3/4P3/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+French: Steinitz attack
+rnbqkbnr/pppp1ppp/4p3/8/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+French defense, Steiner variation
+rnbqkbnr/pppp1ppp/4p3/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppp1ppp/4p3/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn
+rnbqkbnr/pppp1ppp/4p3/8/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/1P6/P1PP1PPP/RNBQKBNR b KQkq -
+French: R\'eti (Spielmann) variation
+rnbqkbnr/pppp1ppp/4p3/8/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+French: King's Indian attack
+rnbqkbnr/pppp1ppp/4p3/8/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+French defense
+rnbqkbnr/pppp1ppp/4p3/8/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+French: Chigorin variation
+rnbqkbnr/pppp1ppp/4p3/8/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+French: Labourdonnais variation
+rnbqkbnr/pppp1ppp/4p3/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Van't Kruijs opening *
+rnbqkbnr/pppp1ppp/8/4N3/4p3/8/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense: Mokele Mbembe (B\"ucker) variation *
+rnbqkbnr/pppp1ppp/8/4p2Q/4P3/8/PPPP1PPP/RNB1KBNR b KQkq -
+KP: Patzer opening
+rnbqkbnr/pppp1ppp/8/4p3/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+Bishop's opening
+rnbqkbnr/pppp1ppp/8/4p3/2P5/2N5/PP1PPPPP/R1BQKBNR b KQkq -
+English opening
+rnbqkbnr/pppp1ppp/8/4p3/2P5/5N2/PP1PPPPP/RNBQKB1R b KQkq -
+English, Nimzovich variation
+rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+Sicilian defense *
+rnbqkbnr/pppp1ppp/8/4p3/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Scandinavian (center counter) defense *
+rnbqkbnr/pppp1ppp/8/4p3/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Queen's pawn: Charlick (Englund) gambit
+rnbqkbnr/pppp1ppp/8/4p3/4P3/2N5/PPPP1PPP/R1BQKBNR b KQkq -
+Vienna game
+rnbqkbnr/pppp1ppp/8/4p3/4P3/2P5/PP1P1PPP/RNBQKBNR b KQkq -
+KP: Lopez opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/3P4/PPP2PPP/RNBQKBNR b KQkq -
+KP: Indian opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+King's knight opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5P2/PPPP2PP/RNBQKBNR b KQkq -
+KP: King's head opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+KP: Napoleon's opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's pawn game *
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's pawn game
+rnbqkbnr/pppp1ppp/8/4p3/4P3/8/PPPPNPPP/RNBQKB1R b KQkq -
+Alapin's opening
+rnbqkbnr/pppp1ppp/8/4p3/4P3/P7/1PPP1PPP/RNBQKBNR b KQkq -
+KP: Mengarini's opening
+rnbqkbnr/pppp1ppp/8/4p3/4PP2/8/PPPP2PP/RNBQKBNR b KQkq -
+King's gambit
+rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Fred *
+rnbqkbnr/pppp1ppp/8/4p3/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird: From gambit
+rnbqkbnr/pppp1ppp/8/4p3/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Reversed Grob (Borg/Basman defense/macho Grob) *
+rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Owen defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: modern variation
+rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+KP: Nimzovich defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/2N5/PPPPPPPP/R1BQKBNR w KQkq -
+Dunst (Sleipner,Heinrichsen) opening
+rnbqkbnr/pppp1ppp/8/4p3/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Caro-Kann defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPP1PPPP/RNBQKBNR w KQkq -
+Mieses opening
+rnbqkbnr/pppp1ppp/8/4p3/8/3P4/PPPNPPPP/R1BQKBNR b KQkq -
+Valencia opening
+rnbqkbnr/pppp1ppp/8/4p3/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+French defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq -
+Benko's opening: reversed Alekhine
+rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -
+Barnes defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/5P2/PPPPPKPP/RNBQ1BNR b kq -
+Hammerschlag (Fried fox/Pork chop opening)
+rnbqkbnr/pppp1ppp/8/4p3/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Robatsch (modern) defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/7P/PPPPPPP1/RNBQKBNR b KQkq -
+Carr's defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+King's pawn opening *
+rnbqkbnr/pppp1ppp/8/4p3/8/N7/PPPPPPPP/R1BQKBNR b KQkq -
+Lemming defense *
+rnbqkbnr/pppp1ppp/8/4p3/8/P1N5/1PPPPPPP/R1BQKBNR b KQkq -
+Battambang opening
+rnbqkbnr/pppp1ppp/8/4p3/8/P6P/1PPPPPP1/RNBQKBNR b KQkq -
+Global opening
+rnbqkbnr/pppp1ppp/8/4p3/8/P7/1PPPPPPP/RNBQKBNR b KQkq -
+St. George (Baker) defense *
+rnbqkbnr/pppp1ppp/8/4p3/P6P/8/1PPPPPP1/RNBQKBNR b KQkq -
+Crab opening
+rnbqkbnr/pppp1ppp/8/4p3/P7/8/1PPPPPPP/RNBQKBNR b KQkq -
+Corn stalk defense *
+rnbqkbnr/pppp1ppp/8/8/2B1Pp2/8/PPPP2PP/RNBQK1NR b KQkq -
+KGA: bishop's gambit
+rnbqkbnr/pppp1ppp/8/8/2P1p3/5N2/PP1PPPPP/RNBQKB1R w KQkq -
+English, Nimzovich, Flohr variation
+rnbqkbnr/pppp1ppp/8/8/3Np3/8/PPPPPPPP/RNBQKB1R b KQkq -
+Alekhine's defense *
+rnbqkbnr/pppp1ppp/8/8/3PPp2/8/PPP3PP/RNBQKBNR b KQkq -
+KGA: Villemson (Steinitz) gambit
+rnbqkbnr/pppp1ppp/8/8/3QP3/8/PPP2PPP/RNB1KBNR b KQkq -
+Center game
+rnbqkbnr/pppp1ppp/8/8/3p4/5N2/PPP1PPPP/RNBQKB1R b KQkq -
+Scandinavian defense *
+rnbqkbnr/pppp1ppp/8/8/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+Danish gambit
+rnbqkbnr/pppp1ppp/8/8/3pP3/8/PPP2PPP/RNBQKBNR w KQkq -
+Center game
+rnbqkbnr/pppp1ppp/8/8/3pPP2/8/PPP3PP/RNBQKBNR b KQkq -
+Halasz gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp1P/8/PPPP2P1/RNBQKBNR b KQkq -
+KGA: Pawn's gambit (Stamma gambit)
+rnbqkbnr/pppp1ppp/8/8/4Pp2/1P6/P1PP2PP/RNBQKBNR b KQkq -
+KGA: Orsini gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/2N5/PPPP2PP/R1BQKBNR b KQkq -
+KGA: Keres (Mason-Steinitz) gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/3B4/PPPP2PP/RNBQK1NR b KQkq -
+KGA: Schurig gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/5N2/PPPP2PP/RNBQKB1R b KQkq -
+King's knight's gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/5Q2/PPPP2PP/RNB1KBNR b KQkq -
+KGA: Breyer gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP1KPP/RNBQ1BNR b kq -
+KGA: Tumbleweed gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPP2PP/RNBQKBNR w KQkq -
+King's gambit accepted
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPB1PP/RNBQK1NR b KQkq -
+KGA: Lesser bishop's (Petroff-Jaenisch-Tartakower) gambit
+rnbqkbnr/pppp1ppp/8/8/4Pp2/8/PPPPQ1PP/RNB1KBNR b KQkq -
+KGA: Carrera (Basman) gambit
+rnbqkbnr/pppp1ppp/8/8/4p3/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Steinitz attack *
+rnbqkbnr/pppp1ppp/8/8/4p3/8/PPPPPPPP/RNBQKBNR b KQkq -
+Alekhine's defense: Brooklyn defense *
+rnbqkbnr/pppp2p1/8/4pP1p/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+KGA: Pawn's gambit (Stamma gambit) *
+rnbqkbnr/pppp2pp/4p3/5p2/2PP4/2N5/PP2PPPP/R1BQKBNR b KQkq -
+Dutch defense, Rubinstein variation
+rnbqkbnr/pppp2pp/4p3/5p2/2PP4/8/PP2PPPP/RNBQKBNR w KQkq -
+Dutch defense
+rnbqkbnr/pppp2pp/4p3/5p2/2PPP3/8/PP3PPP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit deferred
+rnbqkbnr/pppp2pp/4p3/5p2/3P2P1/3Q4/PPP1PP1P/RNB1KBNR b KQkq -
+Dutch, Von Pretzel gambit
+rnbqkbnr/pppp2pp/5p2/4p3/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Damiano's defense
+rnbqkbnr/pppp2pp/5p2/4p3/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+KP: King's head opening *
+rnbqkbnr/pppp2pp/8/4Pp2/3p4/8/PPP2PPP/RNBQKBNR b KQkq -
+KGD: Falkbeer, 3...e4 *
+rnbqkbnr/pppp2pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's gambit accepted *
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/3P4/PPP2PPP/RNBQK1NR b KQkq -
+Bishop's opening: Calabrese counter-gambit, Jaenisch variation
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/5N2/PPPP1PPP/RNBQK2R b KQkq -
+Latvian gambit, 3.Bc4
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR b KQkq -
+KGD: classical variation *
+rnbqkbnr/pppp2pp/8/4pp2/2B1P3/8/PPPP1PPP/RNBQK1NR w KQkq -
+Bishop's opening: Calabrese counter-gambit
+rnbqkbnr/pppp2pp/8/4pp2/2P1P3/8/PP1P1PPP/RNBQKBNR b KQkq -
+KGD: Mafia defense *
+rnbqkbnr/pppp2pp/8/4pp2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+Sicilian: Grand Prix attack *
+rnbqkbnr/pppp2pp/8/4pp2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Bird's opening: Williams gambit *
+rnbqkbnr/pppp2pp/8/4pp2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+KGD: Falkbeer counter-gambit *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+KGD: 2...Nf6 *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5N2/PPPP1PPP/RNBQKB1R w KQkq -
+Latvian counter-gambit
+rnbqkbnr/pppp2pp/8/4pp2/4P3/5Q2/PPPP1PPP/RNB1KBNR b KQkq -
+KGD: Norwalde variation *
+rnbqkbnr/pppp2pp/8/4pp2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+King's gambit *
+rnbqkbnr/pppp2pp/8/4pp2/8/4P3/PPPP1PPP/RNBQKBNR w KQkq -
+French: Labourdonnais variation *
+rnbqkbnr/pppp2pp/8/5p2/2B1Pp2/8/PPPP2PP/RNBQK1NR w KQkq -
+KGA: bishop's gambit, L\'opez-Gianutio counter-gambit
+rnbqkbnr/pppp2pp/8/5p2/3pP3/2P5/PP3PPP/RNBQKBNR b KQkq -
+KGD: Nimzovich counter-gambit *
+rnbqkbnr/pppp2pp/8/5p2/3pP3/8/PPP2PPP/RNBQKBNR w KQkq -
+KGD: Falkbeer counter-gambit *
+rnbqkbnr/pppp2pp/8/5p2/4Pp2/5N2/PPPP2PP/RNBQKB1R w KQkq -
+KGA: Gianutio counter-gambit
+rnbqkbnr/pppp3p/6p1/4pp2/4P3/8/PPPPQPPP/RNB1KBNR b KQkq -
+KGD: Keene's defense *
+rnbqkbnr/ppppp1pp/5p2/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Barnes defense
+rnbqkbnr/ppppp1pp/5p2/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Gedult's opening *
+rnbqkbnr/ppppp1pp/8/5p2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English: Anglo-Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq -
+Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/3P2P1/8/PPP1PP1P/RNBQKBNR b KQkq -
+Dutch, Krejcik gambit
+rnbqkbnr/ppppp1pp/8/5p2/3P4/3Q4/PPP1PPPP/RNB1KBNR b KQkq -
+Dutch, Manhattan (Alapin, Ulvestad) variation
+rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq -
+Dutch defense
+rnbqkbnr/ppppp1pp/8/5p2/3P4/7P/PPP1PPP1/RNBQKBNR b KQkq -
+Dutch, Korchnoi attack
+rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Bird's opening *
+rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Dutch
+rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq -
+Dutch: Staunton gambit
+rnbqkbnr/ppppp1pp/8/5p2/4P3/5N2/PPPP1PPP/RNBQKB1R b KQkq -
+R\'eti: Pirc-Lisitsin gambit
+rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+Bird: From gambit *
+rnbqkbnr/ppppp1pp/8/5p2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Fred
+rnbqkbnr/ppppp1pp/8/5p2/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Bird: Hobbs gambit *
+rnbqkbnr/ppppp1pp/8/5p2/8/1P6/P1PPPPPP/RNBQKBNR w KQkq -
+Nimzovich-Larsen attack: Dutch variation
+rnbqkbnr/ppppp1pp/8/5p2/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti v Dutch
+rnbqkbnr/ppppp1pp/8/5p2/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Bird's opening *
+rnbqkbnr/ppppp1pp/8/5pB1/3P4/8/PPP1PPPP/RN1QKBNR b KQkq -
+Dutch, 2.Bg5 variation
+rnbqkbnr/ppppp1pp/8/8/3Pp3/8/PPP2PPP/RNBQKBNR w KQkq -
+Dutch: Staunton gambit
+rnbqkbnr/pppppp1p/6p1/8/2P5/8/PP1PPPPP/RNBQKBNR w KQkq -
+English opening
+rnbqkbnr/pppppp1p/6p1/8/3P4/8/PPP1PPPP/RNBQKBNR w KQkq -
+Modern defense
+rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Robatsch (modern) defense
+rnbqkbnr/pppppp1p/6p1/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -
+Lasker simul special *
+rnbqkbnr/pppppp1p/6p1/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Benko's opening *
+rnbqkbnr/pppppp1p/8/6p1/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Reversed Grob (Borg/Basman defense/macho Grob)
+rnbqkbnr/pppppp1p/8/6p1/5P2/8/PPPPP1PP/RNBQKBNR w KQkq -
+Bird: Hobbs gambit
+rnbqkbnr/pppppp1p/8/6p1/8/5N2/PPPPPPPP/RNBQKB1R w KQkq -
+R\'eti: Herrstr\"om gambit
+rnbqkbnr/pppppp1p/8/6p1/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Grob's attack *
+rnbqkbnr/ppppppp1/7p/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq -
+Carr's defense
+rnbqkbnr/ppppppp1/7p/8/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Clemenz (Mead's, Basman's or de Klerk's) opening *
+rnbqkbnr/ppppppp1/8/7p/8/6P1/PPPPPP1P/RNBQKBNR w KQkq -
+Lasker simul special
+rnbqkbnr/ppppppp1/8/7p/8/8/PPPPPPPP/RNBQKBNR w KQkq -
+Anti-Borg (Desprez) opening *
+rnbqkbnr/pppppppp/8/4P3/8/8/PPPP1PPP/RNBQKBNR w KQkq -
+Alekhine's defense: Brooklyn defense
+rnbqkbnr/pppppppp/8/8/1P6/8/P1PPPPPP/RNBQKBNR b KQkq -
+Polish (Sokolsky) opening
+rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq -
+English opening
+rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq -
+Queen's pawn
+rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq -
+King's pawn opening
+rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq -
+Bird's opening
+rnbqkbnr/pppppppp/8/8/6P1/8/PPPPPP1P/RNBQKBNR b KQkq -
+Grob's attack
+rnbqkbnr/pppppppp/8/8/7P/8/PPPPPPP1/RNBQKBNR b KQkq -
+Anti-Borg (Desprez) opening
+rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq -
+Nimzovich-Larsen attack
+rnbqkbnr/pppppppp/8/8/8/2N5/PPPPPPPP/R1BQKBNR b KQkq -
+Dunst (Sleipner, Heinrichsen) opening
+rnbqkbnr/pppppppp/8/8/8/2P5/PP1PPPPP/RNBQKBNR b KQkq -
+Saragossa opening
+rnbqkbnr/pppppppp/8/8/8/3P4/PPP1PPPP/RNBQKBNR b KQkq -
+Mieses opening
+rnbqkbnr/pppppppp/8/8/8/4P3/PPPP1PPP/RNBQKBNR b KQkq -
+Van't Kruijs opening
+rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq -
+R\'eti opening
+rnbqkbnr/pppppppp/8/8/8/5P2/PPPPP1PP/RNBQKBNR b KQkq -
+Gedult's opening
+rnbqkbnr/pppppppp/8/8/8/6P1/PPPPPP1P/RNBQKBNR b KQkq -
+Benko's opening
+rnbqkbnr/pppppppp/8/8/8/7N/PPPPPPPP/RNBQKB1R b KQkq -
+Amar (Paris) opening
+rnbqkbnr/pppppppp/8/8/8/7P/PPPPPPP1/RNBQKBNR b KQkq -
+Clemenz (Mead's, Basman's or de Klerk's) opening
+rnbqkbnr/pppppppp/8/8/8/N7/PPPPPPPP/R1BQKBNR b KQkq -
+Durkin's attack
+rnbqkbnr/pppppppp/8/8/8/P7/1PPPPPPP/RNBQKBNR b KQkq -
+Anderssen's opening
+rnbqkbnr/pppppppp/8/8/P7/8/1PPPPPPP/RNBQKBNR b KQkq -
+Ware (Meadow Hay) opening
+rnbqkr2/pppp1pQp/8/2b1P3/3P4/5N2/PPP3PP/RNB1KB1n b KQq -
+Latvian: Behting variation *
+rnbqkr2/ppppbp1p/5N2/4Q3/8/8/PPPP1nPP/R1B1KBNR b KQq -
+Blackburne shilling gambit *
+rnbqr1k1/1p1p1ppp/pbp2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Suetin variation *
+rnbqr1k1/1p3pp1/2p2n1p/p1bpp3/4P3/PBNP1N2/1PP1QPPP/R1B1K2R w KQ -
+Giuoco Piano: Tarrasch variation *
+rnbqr1k1/1pb2ppp/2p2n2/p2pp3/NPP1P3/P2P1N2/2Q1BPPP/R1B1K2R w KQ -
+Ruy Lopez: closed, Balla variation *
+rnbqr1k1/1ppp1ppp/1b3n2/p3p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, anti-Marshall 8.a4 *
+rnbqr1k1/p1pp1ppp/5n2/1p2p3/1bP1P3/2N3P1/PP1P1PBP/R1BQK1NR w KQ -
+Sicilian: Nimzovich-Rossolimo attack, Gurgenidze variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N1P/2P1BPP1/R1BQ1RK1 b - -
+Ruy Lopez: closed, Smyslov defense *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N2/1BP1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Flohr-Zaitsev system (Lenzerheide variation) *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 9.h3 *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP4/2PNBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Ragozin-Petrosian (`Keres') variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NPBN2/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Kholmov variation *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 b - -
+Ruy Lopez: closed, Breyer defense *
+rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/PP2P3/2NP1N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Keres (9...a5) variation *
+rnbqr1k1/pp1p1ppp/1bp2n2/4P3/1P1p4/P1N2N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall, Herman Steiner variation *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P1PP3/P1N2N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: Marshall counter-attack *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 8.c3 *
+rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed (with ...d6) *
+rnbqr1k1/pp3p1p/1bp3pQ/3p4/1P1N4/P1PB4/5PPP/R1B2RK1 b - -
+Ruy Lopez: Marshall, main line, 14...Qh3 *
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w - -
+Benoni: classical, 9...Re8
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b - -
+Benoni: classical, 9...Re8, 10.Nd2
+rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ -
+Benoni: four pawns attack, main line
+rnbqr1k1/pp3pp1/1bp2n1p/3pp3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 w - -
+Ruy Lopez: closed, Breyer, 10.d4 *
+rnbqr1k1/pp3pp1/1bp2n1p/3pp3/1P2P3/P2P1N2/2PNBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Breyer, Borisenko variation *
+rnbqr1k1/pp3pp1/1bp4p/3pp2n/1P2P3/P2P1N2/2PNBPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Breyer, Simagin variation *
+rnbqr1k1/pp3ppB/3b1n2/3pN1B1/3p1P2/8/PPP3PP/RN1Q1RK1 b - -
+Petrov: classical attack, Marshall trap *
+rnbqr1k1/pp3ppp/1bp2n2/3pp1B1/1P2P3/P1NP1N2/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: closed, Bogolyubov variation *
+rnbqr1k1/pp3ppp/1bp2n2/3pp3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, 9.d4 *
+rnbqr1k1/pp3ppp/1bp2n2/4N3/1P1Pp3/P1N1B3/2P1BPPP/R2QK2R w KQ -
+Ruy Lopez: open, 9...Be7, 10.Re1 *
+rnbqr1k1/pp3ppp/1bp5/3nN3/1P1PN3/P3B3/2P1BPPP/R2Q1RK1 b - -
+Ruy Lopez: open, Breslau variation *
+rnbqr1k1/pp3ppp/1bpp1n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Pilnik variation *
+rnbqr1k1/pp3ppp/3b1n2/2ppN1B1/3P1P2/2N5/PPP1B1PP/R2QK2R w KQ -
+Petrov: classical attack, Krause variation *
+rnbqr1k1/pp3ppp/3b1n2/2ppN1BB/3P1P2/2N5/PPP3PP/R2QK2R b KQ -
+Petrov: classical attack, Mar\'oczy variation *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/1PP1P3/P1NP1N2/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Borisenko defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NP2P3/P1PP1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Rossolimo defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NPP1P3/P2P1N2/2Q1BPPP/R1B2RK1 b - -
+Ruy Lopez: closed, Chigorin defense *
+rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NPP1P3/P2P4/3NBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, Keres (...Nd7) defense *
+rnbqr1k1/ppbp1pp1/2p2n1p/4p3/NP2P3/P2P1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed (9...Na5) *
+rnbqr1k1/ppbp1pp1/2p2n1p/4p3/NPP1P3/P2P1N2/4BPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed (10...c5) *
+rnbqr1k1/ppbp1ppp/2p2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - -
+Ruy Lopez: closed, Lutikov variation *
+rnbqr1k1/ppp2ppp/1b3n2/3pp3/1P2P3/P1NP1N2/2P1BPPP/R1BQK2R w KQ -
+Ruy Lopez: closed, 7...d6, 8.d4 *
+rnbqr1k1/ppp2ppp/3b1n2/3pN3/3P4/2N5/PPP1BPPP/R1BQK2R w KQ -
+Petrov: classical attack, Chigorin variation *
+rnbqr1k1/ppp2ppp/5n2/2PP4/2B5/2N1B3/PPP2PpP/R2QK2R w KQ -
+two knights: Max Lange attack, Schlechter variation *
+rnbqr1k1/ppp2ppp/8/2PP4/2B3n1/2N1BpP1/PPP2P1P/R2QK2R b KQ -
+two knights: Max Lange attack, Loman defense *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/1BPPBPPP/R2QK2R b KQ -
+Ruy Lopez: Trajkovi\'c counter-attack *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQ1RK1 b - -
+Ruy Lopez: closed, 7...O-O *
+rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQK2R w KQ -
+Ruy Lopez: closed *
+rnbqr1k1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP1BPPP/R1BQK2R b KQ -
+Ruy Lopez: closed, Averbach variation *
+rnbr2k1/1pq1ppbp/5np1/p1pp4/3P4/1PP1PN2/P2NBPPP/R1BQ1RK1 w - -
+Catalan: closed, Zagoryansky variation *
+rnbr2k1/pp2qppp/5n2/2b1N3/3Pp3/P1N1B3/2PQBPPP/R4RK1 b - -
+Ruy Lopez: open, Howell attack, Ekstr\"om variation *
+rnq1kb1r/pp3ppp/4pn2/3p1b2/3P4/NQ2PN2/PP1B1PPP/R3KB1R b KQkq -
+QGD Slav: Landau variation
diff --git a/data/book/nic000.idx b/data/book/nic000.idx
new file mode 100644
index 0000000..b0cee3c
--- /dev/null
+++ b/data/book/nic000.idx
@@ -0,0 +1,2172 @@
+1r1qr1k1/p1n2pbp/bp1p1np1/2pP2B1/P1N1P3/2N2P2/1P2B1PP/R2Q1R1K b - -
+BI.06
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NPP/PP2PPB1/R1BQ1RK1 w - -
+KI.70
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP2P/2N1BP2/PPQ1N1P1/R3KB1R b KQ -
+KI.33
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1Q2PP/R1N1KB1R b KQ -
+KI.34
+1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ -
+KI.35
+1rbq1rk1/4ppbp/p2p1np1/nppP4/2P5/1PN3P1/PBQNPPBP/R4RK1 b - -
+KI.66
+1rbq1rk1/pp2ppbp/2np1np1/2p5/4P3/2NP1NP1/PPP2PBP/R1BQ1RK1 w - -
+EO.13*
+1rbqk1nr/pp1pppbp/2n3p1/2p5/4P3/2N3P1/PPPP1PBP/R1BQK1NR w KQk -
+EO.15*
+1rbqk1nr/pp2ppbp/2np2p1/2p5/4P3/2NP2P1/PPP2PBP/R1BQK1NR w KQk -
+EO.16*
+1rbqr1k1/1p1n1pbp/p2p1np1/2pP4/P1N5/2N3PP/1P2PPB1/R1BQ1RK1 b - -
+BI.21
+2bq1rk1/1p1nbppp/r1n5/p3p3/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 w - -
+BI.01*
+2kr1b1r/pppq1ppp/2n5/3np3/6b1/2NPPN2/PP2BPPP/R1BQ1RK1 b - -
+SI.28*
+2kr1b1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P1B1PPP/R2QKB1R b KQ -
+SI.30*
+2kr1b1r/pppq1ppp/2n5/3np3/6b1/P1NPPN2/1P3PPP/R1BQKB1R w KQ -
+SI.29*
+2rqkb1r/pp2pppp/2n2n2/2Pp3b/8/4PN1P/PPP1BPP1/RNBQ1RK1 b k -
+QO.07*
+2rqkb1r/pp2pppp/5n2/3p4/3P4/1P5P/P1P1QPP1/RNB2RK1 b k -
+QO.06*
+2rqkb1r/pp3ppp/2n1pn2/2pp3b/3P4/1P2PN1P/PBP1BPP1/RN1Q1RK1 b k -
+QO.09*
+2rqkb1r/pp3ppp/2n1pn2/2pp4/3P2b1/4PN2/PPPNBPPP/R1BQ1RK1 w k -
+QO.11*
+3rkb1r/1pq2ppp/p1n1pn2/2p2b2/Q2P4/2N1PN2/PP2BPPP/R1B2RK1 b k -
+QO.02*
+r1b1k2r/ppp2pp1/3q1nn1/3p4/7p/2P4P/PP1NPPP1/R2QKBNR w KQkq -
+CK.12*
+r1b1kb1r/1pq2ppp/p1nppn2/8/3NPP2/2N5/PPP1B1PP/R1BQ1RK1 w kq -
+SI.24
+r1b1kb1r/pp1n1ppp/2p1pn2/q2p2B1/2PP4/2N1PN2/PP3PPP/R2QKB1R w KQkq -
+QO.15
+r1b1kb1r/pp2pppp/1qn2n2/2pp4/3P4/5NP1/PPP1PPBP/RNBQK2R w KQkq -
+GI.10*
+r1b1kb1r/ppqppppp/2n2n2/1Bp5/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+EO.58*
+r1b1kbnr/1p2pppp/p1q5/2pp4/8/4PN2/PPPP1PPP/RNBQ1RK1 w kq -
+NI.20*
+r1b1kbnr/pp3ppp/2n5/2p1q3/4p3/2N1P3/PP1P1PPP/R1BQKBNR w KQkq -
+EO.55*
+r1b1kbnr/ppq1pppp/2n5/1Bp5/2p5/4PN2/PP1P1PPP/RNBQ1RK1 b kq -
+NI.21*
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/2P5/4PN2/PP1P1PPP/RNBQK2R b KQkq -
+NI.22*
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/3P4/4PN2/PPP2PPP/RNBQK2R b KQkq -
+NI.23*
+r1b1kbnr/ppq1pppp/2n5/1Bpp4/8/4PN2/PPPP1PPP/RNBQK2R w KQkq -
+NI.24*
+r1b1kbnr/ppqp1ppp/2n1p3/8/3NP3/2N5/PPP2PPP/R1BQKB1R w KQkq -
+SI.40
+r1b2rk1/1p1nqppp/2n5/p3p3/2Pp4/P2P1NP1/1P3PBP/RN1Q1RK1 w - -
+BI.14*
+r1b2rk1/2q1bppp/p2p1n2/npp1p3/3PP3/2P2N1P/PPBN1PP1/R1BQR1K1 b - -
+RL.24
+r1b2rk1/pp2bppp/2n1pn2/q2p4/2P2B2/P1N1PN2/1PQ2PPP/3RKB1R w K -
+QO.02
+r1b2rk1/pp2ppbp/2n2np1/2pq4/8/1P2PN2/PB1PBPPP/RN1QK2R w KQ -
+EO.39*
+r1b2rk1/pp2ppbp/2q2np1/2pp4/2P5/1P2P3/PB1PBPPP/RN1Q1RK1 b - -
+QI.13*
+r1b2rk1/pp2ppbp/2q2np1/2pp4/5P2/1P2P3/PBPPB1PP/RN1Q1RK1 b - -
+QI.12*
+r1b2rk1/ppq1ppbp/2n2np1/2ppN3/8/1P2P3/PBPPBPPP/RN1Q1RK1 w - -
+QI.11*
+r1b2rk1/ppq2ppp/2n1pn2/2p5/2BP4/P1P1PN2/5PPP/R1BQ1RK1 w - -
+NI.01
+r1bq1rk1/1p1n1pbp/2pp1np1/p3p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 w - -
+KI.09
+r1bq1rk1/1p1n1pbp/p2p1np1/2pP4/P3P3/2N2N2/1P2BPPP/R1BQ1RK1 w - -
+BI.15
+r1bq1rk1/1p1nb1pp/2n2p2/p3p3/2Pp4/1P1P1NP1/P1N2PBP/R1BQR1K1 b - -
+BI.07*
+r1bq1rk1/1p1nb1pp/2n2p2/p3p3/2Pp4/3P2P1/PPNN1PBP/R1BQR1K1 b - -
+BI.08*
+r1bq1rk1/1p1nb1pp/2n5/p3pp2/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 w - -
+BI.02*
+r1bq1rk1/1p1nbppp/2n5/p3p3/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 b - -
+BI.03*
+r1bq1rk1/1p1nbppp/2n5/p3p3/2PpN3/3P1NP1/PP3PBP/R1BQR1K1 b - -
+BI.04*
+r1bq1rk1/1p1nppbp/2n3p1/p7/2Pp4/P2P1NP1/1P1N1PBP/R1BQR1K1 b - -
+BI.22*
+r1bq1rk1/1p2bppp/2n2n2/p3p3/2Pp4/P2P1NP1/1P1N1PBP/R1BQ1RK1 b - -
+BI.15*
+r1bq1rk1/1p2ppb1/2n3pp/p1n5/2Pp4/P2P1NP1/1P1N1PBP/1RBQR1K1 w - -
+BI.21*
+r1bq1rk1/1p3pp1/2n2b1p/p3p3/2Pp4/P2P1NP1/1P1N1PBP/R2Q1RK1 b - -
+BI.10*
+r1bq1rk1/1p3ppp/2n1pn2/pBbp4/5B2/2P1PN2/PP3PPP/RN1QK2R w KQ -
+SL.05*
+r1bq1rk1/1p3ppp/p1nbpn2/1Bpp4/2PP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+NI.02*
+r1bq1rk1/1pp1ppbp/p1np1np1/8/2PP4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+KI.71
+r1bq1rk1/2p1bpp1/p1np1n1p/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 w - -
+RL.22
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/3PP3/1BP2N2/PP3PPP/RNBQR1K1 b - -
+RL.20
+r1bq1rk1/2p1bppp/p1np1n2/1p2p3/4P3/1BP2N1P/PP1P1PP1/RNBQR1K1 b - -
+RL.21
+r1bq1rk1/2p1bppp/p2p1n2/np2p3/4P3/2P2N1P/PPBP1PP1/RNBQR1K1 b - -
+RL.23
+r1bq1rk1/2ppbppp/p1n2n2/1p2p3/P3P3/1B3N2/1PPP1PPP/RNBQR1K1 b - -
+RL.18
+r1bq1rk1/3nppbp/p1pp1np1/1p6/2PPP3/2NBBP2/PP2N1PP/R2Q1RK1 w - -
+KI.46
+r1bq1rk1/5ppp/p1p1pn2/2bp4/2P5/2N1PN2/PPQ2PPP/R1B2RK1 b - -
+NI.01*
+r1bq1rk1/p1p2ppp/5n2/3p2B1/1b6/2NB4/PPP2PPP/R2Q1RK1 b - -
+SO.03
+r1bq1rk1/p3bp1p/2n2np1/1pp1p3/3pPP1N/3P2P1/PPP1N1BP/R1BQ1RK1 b - -
+KI.04*
+r1bq1rk1/p3bppp/2n2n2/1pp1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+KI.05*
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ -
+KI.42
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2N2/PP3PPP/R1BQRBK1 b - -
+KI.10
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NP1/PP3PBP/R1BQ1RK1 w - -
+KI.63
+r1bq1rk1/pp1n1pbp/2pp1np1/4p3/2PPP3/2N2NPP/PP3PB1/R1BQ1RK1 b - -
+KI.62
+r1bq1rk1/pp1n1ppp/4pn2/2p5/1bBP4/2N1PN2/PP3PPP/R1BQ1RK1 w - -
+NI.03
+r1bq1rk1/pp1nbppp/2n5/2p1p3/3pP3/3P1NP1/PPP1NPBP/R1BQ1RK1 w - -
+KI.07*
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/3P1NP1/PP1N1PBP/R1BQR1K1 b - -
+BI.05*
+r1bq1rk1/pp1nbppp/2n5/4p3/2Pp4/N2P1NP1/PP3PBP/R1BQR1K1 b - -
+BI.09*
+r1bq1rk1/pp1pppbp/2n2np1/1Bp5/4P3/2N2N2/PPPP1PPP/R1BQ1RK1 w - -
+EO.01*
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1P2PN2/PB1PBPPP/RN1QK2R b KQ -
+EO.40*
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/1P3NP1/PB1PPPBP/RN1QK2R b KQ -
+EO.48*
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 b - -
+EO.27*
+r1bq1rk1/pp1pppbp/2n2np1/2p5/2P5/2N2NP1/PP1PPPBP/R1BQ1RK1 w - -
+EO.27
+r1bq1rk1/pp1pppbp/2n2np1/8/2PN4/2N1P3/PP2BPPP/R1BQK2R b KQ -
+EO.41*
+r1bq1rk1/pp1pppbp/2n2np1/8/2PN4/2N3P1/PP2PPBP/R1BQ1RK1 b - -
+EO.26
+r1bq1rk1/pp2bppp/2n1p3/2pn4/3PP3/2N2NP1/PP3PBP/R1BQ1RK1 b - -
+TD.02
+r1bq1rk1/pp2bppp/2n2n2/2p1p3/3pP3/3P1NP1/PPPN1PBP/R1BQ1RK1 w - -
+KI.12*
+r1bq1rk1/pp2bppp/2n2n2/2pp2B1/3P4/2N2NP1/PP2PPBP/R2Q1RK1 b - -
+TD.03
+r1bq1rk1/pp2bppp/2n2n2/2pp4/3P4/2N2NP1/PP2PPBP/R1BQ1RK1 w - -
+TD.04
+r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPP2PBP/RNBQ1RK1 w - -
+KI.15*
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diff --git a/data/book/nic999.idx b/data/book/nic999.idx
new file mode 100644
index 0000000..b0cee3c
--- /dev/null
+++ b/data/book/nic999.idx
@@ -0,0 +1,2172 @@
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diff --git a/data/book/opening.doc b/data/book/opening.doc
new file mode 100644
index 0000000..c49e43e
--- /dev/null
+++ b/data/book/opening.doc
@@ -0,0 +1,27 @@
+
+You'll find the following files:
+
+fen.doc
+long001.idx
+eco000.idx
+nic000.idx
+changes.txt
+
+long.idx is standard English long name
+eco.idx is the ECO classification scheme
+nic.idx is the NIC classification scheme
+
+Current features:
+
+Include color reversed positions (tagged with a *).
+
+Please do not modify any of these files and then distribute, since I do
+not want multiple versions of these floating around and confusing people.
+If there is something you'd like to see added or changed, please contact
+me so we can do it together and keep everything coherent.  The next
+versions planned will hopefully feature *much* greater compression of data,
+and the abilility to recognize a transposition out of one main line and
+into another (there is a difference between very early positions and deep
+main lines).
+
+Chris Long {clong@cnj.digex.net, clong@eden.rutgers.edu}