Author: Dan Honeycutt
Date: 22:51:57 07/02/04
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On July 03, 2004 at 01:19:25, Tor Lattimore wrote: >Thanks! >Another thing also to do with pawn hash. What do you store in it? i've heard of >some putting the king in. Pawn hash is only used for evaluation, so no need for >bounds ec cetera either is there? unless I mis-understand the idea, only >evaluation scores are needed (and key of course). > >What sort of replacement schemes are typically used? I use always replace in my >standard transpos table, not sure if thats best here? Hi Tor. To your original question, pawn hash doesn't have to be too big. Tord Romstad may jump in and say a few hundred entrys are sufficient, but for most of us it's at least a few thousand. I used to hash the king, but after a fair amount of twiddling I threw him out. Others suggested to me a dual hash, pawns only and pawns + king. Haven't tried that. Replace always or clear the table on any pawn move. You'll rebuild it after a search or two. Dan H.
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