Author: Ricardo Gibert
Date: 01:06:14 07/10/02
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On July 10, 2002 at 03:24:52, Gian-Carlo Pascutto wrote: >A version of my program that played crazyhouse chess used two >hashkeys, one for the pieces in hand and one for the pieces on >the board. Both 32 bits. Used for both evaluation caching and >ttable. > >After about 1.5 years I discovered a bug that erronously >always returned a hit regardless of the hash of the pieces >in hand. Because in crazyhouse this totally changes kingsafety, >it was essentially returning random evaluations each time. > >I fixed this. Some of the weird scores I saw were gone, but >playing strength was basically unaffected. > >The reasoning is simply this. I am doing about 599 999 totally >wrong evaluations per second. The search corrects for them. >What are 100 hash collisions going to change? > >-- >GCP That is less of an explanation than an observation. You need to explore how "The search corrects for them" to understand what is going on.
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