Author: Georg v. Zimmermann
Date: 08:48:23 08/21/01
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On August 20, 2001 at 12:02:11, Antonio Dieguez wrote: >On August 20, 2001 at 01:03:30, Georg v. Zimmermann wrote: > >... >>nullscore = -search(-beta, -beta+1, depth-3, 1); >> >>=> he is using R=2 >> >>Georg > >oops am I missing something? >The search here recieved a "depth", and here the nullmove call the search with >depth-3 so three plies less will be played right? I 'm not understanding what >that depth variable means or what a r=3 or r=2 means for you all? > >thx. R is the Null Move Depth Reduction. For the normal search you reduce the remaining depth by one ply the deeper you go into the tree. So for the Nullmove nullscore = -search(-beta, -beta+1, depth -R -1, 1); Therefore his extra reduction is 2. Georg
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