Author: William Bryant
Date: 07:19:06 08/21/99
How do programs evaluate passed pawns in the search to trigger a passed pawn push extenison. I noted in Crafty's code that it check to see if a pawn push is a passed pawn, and the pawn won't be immediately captured, and then searches deeper. What stratigies do programs use to keep track of passed pawns? Are these updated in makemove and takeback functions or do you call an evaluate-for-passed-pawns function in the search to see if things have changed since the last pawn move? What gains in the search does a passed pawn push extension provide? Thanks in a advance. William wbryant@ix.netcom.com
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