Author: Heiner Marxen
Date: 08:32:51 05/19/99
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On May 18, 1999 at 08:02:09, Peter Klausler wrote: >On May 17, 1999 at 21:15:59, Dann Corbit wrote: > >>You would also need to store e.p. square, if any, I think. Ten bits more >>[5ep+4castle+1stm]gives 174 bits. > >Two bits are all you need for the en passant file, actually. >There can be at most four pawns of the opponent on his >fourth rank next to a pawn of the player (on his fifth). Wrong. There can be 5 such pawns. E.g. 8/8/8/8/PpPPpPPp/8/8/8 b - Even when we know already that there is an e.p. possible, we still have to distinguish up to at least 5 cases.
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