Author: James Swafford
Date: 04:57:39 01/30/02
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My apologies... I see you were asking about 'potential' passed pawns, which isn't what I described. -- James On January 30, 2002 at 07:55:34, James Swafford wrote: >On January 29, 2002 at 19:55:03, Albert Silver wrote: > >>On January 29, 2002 at 12:46:50, Dan Andersson wrote: >> >>>Yep! But they are potential passed pawns. Then it depends on if you wish to add >>>such a factor. >>> >>>MvH Dan Andersson >> >>Is code on potential passed pawns common? Or is it too costly to be worth it? >> >> Albert > >It can be done pretty easily with bitmaps (bitboards). Last night I >created two arrays of bitmaps - passed_white[64] and passed_black[64]. >passed_white[E4] has 'bits on' for D5->D8, E5->E8, and F5->F8. >THen AND that with black_pawns to see if a white pawn on E4 is passed. > >That worked much better than what I was originally doing, which was >looking only on the file I was on. > >-- >James
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