Author: Miguel A. Ballicora
Date: 09:03:10 08/22/01
Go up one level in this thread
On August 22, 2001 at 10:44:42, Antonio Dieguez wrote: >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. At the beginning I understood the reduction like you Antonio! The official definition takes into account that nullmove is like a real move, so the reduction would be 2. Well, that is my interpretation that could be wrong again :-) Saludos, Miguel
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