Author: Vincent Diepeveen
Date: 03:21:17 12/06/01
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On December 06, 2001 at 05:45:12, Gerd Isenberg wrote: not bad, but when i used pawn hashtable i used zobrist and i when i checked at 1 hour a game i had 0 mishits. >in my current implementation i use the difference of the black and white pawn >BitBoards mod nEntries (which i learned here is not so smart) for indexing the >pawn table - with nEntries is a prime > 50000. The entries are quite large with >a lot of BitBoards in it for pawn properties such as backward, isolated, open >and passed. They also include the original pawn BitBoards for black and white >for verification. I use a replacement sheme, that checks up to four consecutive >entries - the one with the lowest ProbeCount will replaced. >There are no ep- neither side to move information in my pawn hash table. > >The hit rate seems to be OK 96%-99.9% - but anyway i should redesign the whole >thing. > >Gerd
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