Author: Robert Hyatt
Date: 17:55:13 06/21/99
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On June 21, 1999 at 16:58:30, Michel Langeveld wrote: >1 What is hashed for the kindsafety? In Cray Blitz, the king position, plus the pawn scoring that affects the king safety. Which means that the king position plus all the pawns on the board are using for the hash signature. >2 What kind of information was stored in it? >3 Why doesn't crafty hash this anymore (am I right)? I got rid of the king position component, and hash the king safety for both sides of the board and store them in the pawn hash table. Then when I do an eval, I choose the right value depending on which side of the board the king is on. >4 Are there other hashtables to be considered beside Positionhash, Pawnhash, >king safety hashtable > You can hash anything. But the problem is that whatever pieces you use to evaluate have to be factored into the hash signature... which means a really large many-to-one mapping... Beyond pawns it probably doesn't make a lot of sense... >Kind regards, > >Michel Langeveld
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