Author: Sune Fischer
Date: 01:48:48 09/13/03
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On September 12, 2003 at 17:02:04, Gerd Isenberg wrote: > >Yes, but if "key" is whitePawns-blackPawns, bitboards as 64-bit ints, you may >loose some pawns. That's the advantage with zobrist keys. True. I've never tried the subtraction, interesting idea. I would guess, that it doesn't spread as good as random zobrist keys, but it may not be a big issue for a pawn hash. >I guess a 32-bit key, >incremental updated if pawn structure changed, is good enough to address the >pawn hash table. Why consider 32 bit? You have the 64 bit zobrist table already in cache. You're a bitboarder, think 64 bit and drop the 32 bit kludges.. ;) -S. >Gerd
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