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daylen / stockfish-mac

Beautiful, powerful chess app for the Mac
http://stockfishchess.org/mac/
GNU General Public License v3.0
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FEN is not correctly computed. #27

Open vieiro opened 8 years ago

vieiro commented 8 years ago

Hi,

I've just installed Stockfish Version 2.0.2 (19) from the AppStore and I was trying out the FEN capabilities by looking at a recent game from the Baku Olympiad. I'm attaching a sample PGN file. baku-game.zip

After 2.g3, Stockfish reports this FEN:

rnbqkb1r/pppppppp/5n2/8/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq - 3 2

But since a pawn has moved, the move number (the 3 above) should be set to 0, so the FEN should look like:

rnbqkb1r/pppppppp/5n2/8/8/5NP1/PPPPPP1P/RNBQKB1R b KQkq - 0 2

Also, after 2... d5, the move number should be reset to 0 again (another pawn has moved), and the enpassant portion of the FEN should be set to d6

rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq d6 0 3

But the application reports

rnbqkb1r/ppp1pppp/5n2/3p4/8/5NP1/PPPPPP1P/RNBQKB1R w KQkq - 4 3