Author: Robert Hyatt
Date: 20:58:43 12/02/01
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On December 02, 2001 at 22:38:30, David Rasmussen wrote: >Many people use 32-bit pawn hashkeys. But I've found that 32 bits is not enough >to avoid collisions. 64-bit seems to be enough, and maybe less could do the job. >Why do people use 32-bit keys, when it screws up evaluation this way? > >/David 32 is ok for pawns. To see why, figure out how many _different_ positions there are with only pawns on the board. The number is not as large as you might think, which makes collisions unlikely so long as you _only_ hash pawn positions.
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