Author: Antonio Dieguez
Date: 07:44:42 08/22/01
Go up one level in this thread
On August 21, 2001 at 11:48:23, Georg v. Zimmermann wrote: >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 wow...... thanks..... amazing :) I suspected that before only by a post of Vincent before, that said something like if there is 5 plies remaining, with r=3, only one ply will be played by the other side. That's true anyway. A little ambiguous for me :) so I'm using r=2. Thanks for the info :) I do have tried r=3, it didn't look better. thanx again. doh. Anyway the REAL reduction is 3 there. I don't get the sense of the oficial definition.
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