Author: Daniel Clausen
Date: 08:33:01 01/28/02
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On January 28, 2002 at 10:52:29, Benny Antonsson wrote: >Can you tell from a FEN-string if one side has castled or not ? > >E.g: r1bqk1nr/pppp1ppp/2n5/2b1p3/2B1P3/5N2/PPPP1PPP/RNBQ1RK1 b kq - 0 40 > >This string doesn't directly tell you that white has castled... only that >white lost all castling rights. You just answered your own question - that's it's generally not possible to decide whether one side has castled or not. >Do I have to assume that white has castled because the king is on g1 and the rook is on f1 ? Such an assumption surely doesn't hold, since the king and rook could move to these places in several steps, w/o castling. Similarly, the opposite is also not a valid assumption. Sargon
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