Author: Bruce Cleaver
Date: 09:14:10 09/20/99
Here's an idea: many programs include a pawn-only hash table, and the hit rates on it are quite high. Since the bishop evaluation in any postion is strongly coupled to the type of pawn structure (bishop + many pawns on same color is generally a negative, for example), you might save computation time by putting these together. The pawn-only tables would then be a subset of the pawn-bishop hash tables (those pawn-bishop positions without any bishops). Other pieces aren't nearly so coupled to the pawns (rook, knight, etc.). No doubt it has its drawbacks as well. Perhaps the space required would greatly increase, leaving less room for the full hash table, thus actually decreasing performance. Still, I'd like to hear feedback.... Thanks, Bruce
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