Author: zaid magi
Date: 01:36:22 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 well, i think you are right!! if you do Nf1g3 depth 10, then null move depth (say) 7, then Ng3f1 depth 6. so you actually research the same position, but instead at depth 10 at depth 6. if we do as you say, guess null-moving will become (just a little) more acurate.
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