Author: Simon Waters
Date: 14:03:17 01/04/01
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The hash table in GNUchess 5 is changed with the command hashsize. hashsize 1234567 The number is rounded to the largest multiple of 2 less than the number given due to the method used. The pawn hash table is not configurable except by changing PAWNSLOTS in the appropriate header and recompiling. It is likely that the default hash table will be larger in the next release. I have sent Stuart a rule of thumb for choosing between ordinary hash and pawn hash given a certain amount of memory, but this looks like it will be a comment in the header files rather than a user friendly option. Basically with most of our PC's big hash is better till you start swapping when it hurts big time. The hash collisions reported by GNU chess are slightly misleading, you are referred to the source code for clarification 8-) Basically more memory may not reduce the reported collisions as expected as not everything reported is a true collision.
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