Author: Carlos del Cacho
Date: 14:17:28 08/12/00
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On August 12, 2000 at 16:40:53, Inmann Werner wrote: >Hello > >I have a question about the fen string. >First comes the position, then w or b for side on move and then some information >about ep-status and rochade status. >How does the ep-status and Rochade status information work? > >Werner After side on move comes castling status KQkq, Qkq or the like (where white is upper case). When no player can castle tha's indicated by means of a hyphen. Once that's specified we go for the ep target square (for example c6, notice that's the one behind the pawn that has just advanced). If no ep suare at all... another hyphen. Normally that's all. Some fen strings include the number of times this position has arised throughout the game and the number of moves since the last capture, pawn move or castling move (to apply correctly the 50 move rule). Most test suites don't include these two. You can find more info in the PGN standard. Carlos
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