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Subject: Re: pawn structure, pawn hash, square-of-pawn, pawn-races

Author: Robert Hyatt

Date: 07:56:14 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?
>
>Eric


Yes. That is what I do in fact.  :)

BITBOARD  white_pawn_race_wtm[64];
BITBOARD  white_pawn_race_btm[64];
BITBOARD  black_pawn_race_wtm[64];
BITBOARD  black_pawn_race_btm[64];



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