Author: KarinsDad
Date: 02:29:10 06/21/99
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On June 18, 1999 at 16:05:54, Stuart Cracraft wrote: >On June 17, 1999 at 10:10:43, KarinsDad wrote: > >>>Recommendation #3: Set up a pawn structure hash table. Since pawns rarely move >>in the game (and in the search <40% on average), it is probably better to >>calculate pawn advantages and deficiencies once per given pawn structure as >>opposed to calculating it every time in your evaluation. >> > >Does not work. The pawn structure hash table is independent of anything >except pawn structure. If you try to fold in some representation into >that score for the given pawn structure of the board representing >the score increase or decrease based on square control for any other >piece except pawns, it will have no bearing on all other positions >where there is a different arrangement of pieces but the same arrangement >of pawns. > >That's why backward pawns can be calculated and put into the pawn structure >hash table but no score corresponding to control of the squares in front >of the backward pawn nor the backward pawn itself (i.e. control of). > >Non-pawn-related factors have to be calculated after the pawn >structure hash data structure's score is either retrieved successfully >or calculated for the first time. Of course. I didn't mean to imply differently. KarinsDad :)
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