diff options
| -rw-r--r-- | FICS/movecheck.c | 101 |
1 files changed, 63 insertions, 38 deletions
diff --git a/FICS/movecheck.c b/FICS/movecheck.c index d7cf963..0bc953e 100644 --- a/FICS/movecheck.c +++ b/FICS/movecheck.c @@ -134,45 +134,70 @@ PUBLIC int InitPieceLoop(board_t b, int *f, int *r, int color) return 1; } -/* All of the routines assume that the obvious problems have been checked */ -/* See legal_move() */ -PRIVATE int legal_pawn_move( game_state_t *gs, int ff, int fr, int tf, int tr ) +PRIVATE int +legal_pawn_move(game_state_t *gs, int ff, int fr, int tf, int tr) { - if (ff == tf) { - if (gs->board[tf][tr] != NOPIECE) return 0; - if (gs->onMove == WHITE) { - if (tr - fr == 1) return 1; - if ((fr == 1) && (tr - fr == 2) && gs->board[ff][2]==NOPIECE) return 1; - } else { - if (fr - tr == 1) return 1; - if ((fr == 6) && (fr - tr == 2) && gs->board[ff][5]==NOPIECE) return 1; - } - return 0; - } - if (ff != tf) { /* Capture ? */ - if ((ff - tf != 1) && (tf - ff != 1)) return 0; - if ((fr - tr != 1) && (tr - fr != 1)) return 0; - if (gs->onMove == WHITE) { - if (fr > tr) return 0; - if ((gs->board[tf][tr] != NOPIECE) && iscolor(gs->board[tf][tr],BLACK)) - return 1; - if (gs->ep_possible[0][ff] == 1) { - if ((tf==ff+1) && (gs->board[ff+1][fr] == B_PAWN)) return 1; - } else if (gs->ep_possible[0][ff] == -1) { - if ((tf==ff-1) && (gs->board[ff-1][fr] == B_PAWN)) return 1; - } - } else { - if (tr > fr) return 0; - if ((gs->board[tf][tr] != NOPIECE) && iscolor(gs->board[tf][tr],WHITE)) - return 1; - if (gs->ep_possible[1][ff] == 1) { - if ((tf==ff+1) && (gs->board[ff+1][fr] == W_PAWN)) return 1; - } else if (gs->ep_possible[1][ff] == -1) { - if ((tf==ff-1) && (gs->board[ff-1][fr] == W_PAWN)) return 1; - } - } - } - return 0; + if (ff == tf) { + if (gs->board[tf][tr] != NOPIECE) + return 0; + + if (gs->onMove == WHITE) { + if (tr - fr == 1) + return 1; + if ((fr == 1) && (tr - fr == 2) && + gs->board[ff][2] == NOPIECE) + return 1; + } else { + if (fr - tr == 1) + return 1; + if ((fr == 6) && (fr - tr == 2) && + gs->board[ff][5] == NOPIECE) + return 1; + } + + return 0; + } + + if (ff != tf) { /* Capture ? */ + if ((ff - tf != 1) && (tf - ff != 1)) + return 0; + if ((fr - tr != 1) && (tr - fr != 1)) + return 0; + + if (gs->onMove == WHITE) { + if (fr > tr) + return 0; + if ((gs->board[tf][tr] != NOPIECE) && + iscolor(gs->board[tf][tr], BLACK)) + return 1; + if (gs->ep_possible[0][ff] == 1) { + if ((tf == ff + 1) && + (gs->board[ff + 1][fr] == B_PAWN)) + return 1; + } else if (gs->ep_possible[0][ff] == -1) { + if ((tf == ff - 1) && + (gs->board[ff - 1][fr] == B_PAWN)) + return 1; + } + } else { + if (tr > fr) + return 0; + if ((gs->board[tf][tr] != NOPIECE) && + iscolor(gs->board[tf][tr], WHITE)) + return 1; + if (gs->ep_possible[1][ff] == 1) { + if ((tf == ff + 1) && + (gs->board[ff + 1][fr] == W_PAWN)) + return 1; + } else if (gs->ep_possible[1][ff] == -1) { + if ((tf == ff - 1) && + (gs->board[ff - 1][fr] == W_PAWN)) + return 1; + } + } + } + + return 0; } PRIVATE int |