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implement detecting castling for moves - chess-puzzles - chess puzzle book gene… |
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git clone git://git.codemadness.org/chess-puzzles |
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--- |
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commit d1450a9bf4d9b009733094038420a82a6872a8ae |
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parent 09a541233ed6f1abf9f4498b37d1281a78f65ce8 |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Tue, 19 Dec 2023 00:31:55 +0100 |
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implement detecting castling for moves |
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Diffstat: |
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M fen_to_svg.c | 33 +++++++++++++++++++++++++++++… |
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1 file changed, 32 insertions(+), 1 deletion(-) |
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--- |
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diff --git a/fen_to_svg.c b/fen_to_svg.c |
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@@ -286,7 +286,38 @@ main(int argc, char *argv[]) |
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place(piece, x2, y2); |
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s += 2; |
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- /* possible promotion? (queen, knight, bishop) */ |
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+ /* castling */ |
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+ if (piece == 'K' && y == 7 && y2 == 7 && x == 4) { |
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+ /* white: kingside castling: "e1g1" */ |
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+ if (x2 == 6) { |
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+ place('R', x2 - 1, y2); |
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+ x2 = 7; |
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+ y2 = 7; |
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+ place(0, x2, y2); /* clear rook square… |
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+ } else if (x2 == 2) { |
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+ /* white: queenside castling: "e1c1" */ |
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+ place('R', x2 + 1, y2); |
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+ x2 = 0; |
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+ y2 = 7; |
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+ place(0, x2, y2); |
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+ } |
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+ } else if (piece == 'k' && y == 0 && y2 == 0 && x == 4… |
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+ /* black: kingside castling: "e8g8" */ |
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+ if (x2 == 6) { |
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+ place('r', x2 - 1, y2); |
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+ x2 = 7; |
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+ y2 = 0; |
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+ place(0, x2, y2); /* clear rook square… |
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+ } else if (x2 == 2) { |
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+ /* black: queenside castling: "e8c8" */ |
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+ place('r', x2 + 1, y2); |
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+ x2 = 0; |
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+ y2 = 0; |
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+ place(0, x2, y2); /* clear rook square… |
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+ } |
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+ } |
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+ |
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+ /* possible promotion: queen, knight, bishop */ |
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if (*s == 'q' || *s == 'n' || *s == 'b') { |
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if (side_to_move == 'w') |
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piece = toupper(*s); |
