Author: Tord Romstad
Date: 02:05:19 08/20/04
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On August 20, 2004 at 00:37:26, Eric Oldre wrote: >On August 19, 2004 at 18:46:32, Robert Hyatt wrote: >> >> >>Has to do with passed pawns and no pieces on the board. If you form a square >>with one side going from the pawn to its promotion square, if the king is inside >>that square, the pawn can't run and promote. If the king is outside that square >>then the pawn promotes and wins. Simple idea with a few wrinkles to deal with. > >Thanks Robert, >that is actuall something I know i've read about at some point on this board. >and it's something that i hope i'll get to at some point. > >wouldn't you need to have 2 different bit boards? depending on who's turn it is >to move? You don't need even a single bitboard. Just compare the distance of the passed pawn to the promotion square to the distance of the defending king to the promotion square. Subtract 1 from the defending king's distance if it is the defender's turn to move. Tord > >Eric
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