diff options
Diffstat (limited to 'data/book')
| -rw-r--r-- | data/book/changes.txt | 25 | ||||
| -rw-r--r-- | data/book/eco000.idx | 2008 | ||||
| -rw-r--r-- | data/book/eco999.idx | 2008 | ||||
| -rw-r--r-- | data/book/fen.doc | 130 | ||||
| -rw-r--r-- | data/book/long001.idx | 8076 | ||||
| -rw-r--r-- | data/book/long999.idx | 8076 | ||||
| -rw-r--r-- | data/book/nic000.idx | 2172 | ||||
| -rw-r--r-- | data/book/nic999.idx | 2172 | ||||
| -rw-r--r-- | data/book/opening.doc | 27 |
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 @@ +1rbq1rk1/1pp1ppbp/p1np1np1/8/2PPP3/2N1BP2/PP1QN1PP/R3KB1R w KQ - +E84 +2kr1b1r/ppp3pp/2n2q2/3npp2/6b1/P2PPN2/1PQNBPPP/R1B1K2R b KQ - 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+C33 +rnbqkbnr/pppp2pp/8/4pP2/8/8/PPPP1PPP/RNBQKBNR b KQkq - +C33* +rnbqkbnr/pppp2pp/8/4pp2/2P5/8/PP1PPPPP/RNBQKBNR w KQkq - +B21* +rnbqkbnr/pppp2pp/8/4pp2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq - +C31* +rnbqkbnr/pppp2pp/8/4pp2/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - +C30* +rnbqkbnr/ppppp1pp/8/5p2/2PP4/8/PP2PPPP/RNBQKBNR b KQkq - +A84 +rnbqkbnr/ppppp1pp/8/5p2/3P4/6P1/PPP1PP1P/RNBQKBNR b KQkq - +A81 +rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR b KQkq - +A03* +rnbqkbnr/ppppp1pp/8/5p2/3P4/8/PPP1PPPP/RNBQKBNR w KQkq - +A80 +rnbqkbnr/ppppp1pp/8/5p2/3PP3/8/PPP2PPP/RNBQKBNR b KQkq - +A82 +rnbqkbnr/ppppp1pp/8/5p2/8/8/PPPPPPPP/RNBQKBNR w KQkq - +A02* +rnbqkbnr/pppppp1p/6p1/8/4P3/8/PPPP1PPP/RNBQKBNR w KQkq - +B06 +rnbqkbnr/pppppppp/8/8/2P5/8/PP1PPPPP/RNBQKBNR b KQkq - +A10 +rnbqkbnr/pppppppp/8/8/3P4/8/PPP1PPPP/RNBQKBNR b KQkq - +A40 +rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq - +B00 +rnbqkbnr/pppppppp/8/8/5P2/8/PPPPP1PP/RNBQKBNR b KQkq - +A02 +rnbqkbnr/pppppppp/8/8/8/1P6/P1PPPPPP/RNBQKBNR b KQkq - +A01 +rnbqkbnr/pppppppp/8/8/8/5N2/PPPPPPPP/RNBQKB1R b KQkq - +A04 +rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR b KQkq - +A00* +rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - +A00 +rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N1P/2P1BPP1/R1BQ1RK1 b - - +C93* +rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - - +C92* +rnbqr1k1/pp1p1pp1/1bp2n1p/4p3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 b - - +C94* +rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P1PP3/P1N2N2/2P1BPPP/R1BQ1RK1 b - - +C89* +rnbqr1k1/pp1p1ppp/1bp2n2/4p3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 b - - +C90* +rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N2N2/PP2BPPP/R1BQ1RK1 w - - +A76 +rnbqr1k1/pp3pbp/3p1np1/2pP4/4P3/2N5/PP1NBPPP/R1BQ1RK1 b - - +A77 +rnbqr1k1/pp3pbp/3p1np1/2pP4/4PP2/2N2N2/PP2B1PP/R1BQK2R w KQ - +A69 +rnbqr1k1/pp3pp1/1bp2n1p/3pp3/1P2P3/P2P1N2/2P1BPPP/RNBQ1RK1 w - - +C95* +rnbqr1k1/pp3ppp/1bp2n2/3pp3/1P2P3/P1NP1N2/2P1BPPP/R1BQ1RK1 w - - +C91* +rnbqr1k1/ppb2pp1/2p2n1p/3pp3/NPP1P3/P2P1N2/2Q1BPPP/R1B2RK1 b - - +C97* +rnbqr1k1/ppbp1pp1/2p2n1p/4p3/NP2P3/P2P1N2/2P1BPPP/R1BQ1RK1 w - - +C96* +rnbqr1k1/pppp1ppp/1b3n2/4p3/1P2P3/P1N2N2/2PPBPPP/R1BQK2R w KQ - +C88* +rnbqr1k1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP1BPPP/R1BQK2R b KQ - +C87* 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 - 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- +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 - 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- +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* +r1bq1rk1/pp2bppp/2n2n2/2ppp3/4P3/3P1NP1/PPPN1PBP/R1BQ1RK1 b - - +KI.14* +r1bq1rk1/pp2bppp/2n2n2/4p1B1/2Pp4/3P1NP1/PP3PBP/RN1Q1RK1 b - - +BI.16* +r1bq1rk1/pp2bppp/2n5/2pp4/3P4/5NP1/PP2PPBP/R1BQ1RK1 w - - +TD.01 +r1bq1rk1/pp2bppp/2nn4/2p1p3/3pPP2/3P2P1/PPPNN1BP/R1BQ1RK1 b - 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+RL.19* +rnbqr1k1/pppp1ppp/5n2/b3p3/4P3/P1NP1N2/1PP1BPPP/R1BQK2R b KQ - +RL.16* 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} |