Author: Vincent Diepeveen
Date: 11:06:37 04/07/04
Go up one level in this thread
On April 07, 2004 at 04:06:38, Tord Romstad wrote: >The following idea is still untested, but unless I am missing something it >is guaranteed to reduce the number of nodes without any risk. The idea is >fairly obvious, and I am sure some of you are already using it, but I still >don't think it is widely known. > >At a node where the remaining depth is sufficiently big that a null move >would not drop us directly into the qsearch, and beta > DRAW_SCORE, avoid >doing a null move search if the move leading to the node was a reversible >move. The point is that we know that the null move search is a waste of >time in this case. After the null move, the opponent can just reverse >his move, with a repetition draw score. > >Tord In diep nullmove has the same effect upon the 2 fold repetition like a pawn move. I guess now you will search even deeper because you really want a fail low :)
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.