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Subject: Re: Static Eval: Scores for White ! Price question ;-)

Author: Gerd Isenberg

Date: 13:30:08 02/26/04

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What is wrong with using left/right- and vertical/color-mirrored dependent
zobrist keys, to improve the hit rate in rather symmetric post-castling
positions?

eg.:

uint64 MirrorLeftRight(uint64 hashkey) {
  return hashkey ^ randConstMirrorLeftRight;}

uint64 MirrorVerticallyAndColor(uint64 hashkey) {
  return hashkey ^ randConstMirrorVerColor;}




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