Author: Robert Hyatt
Date: 19:14:51 09/08/99
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On September 08, 1999 at 20:58:15, Bas Hamstra wrote: >I tried Bruces idea to play SEE<0 the very last. When I run the wac suite I >think it chokes on some positions. I like your scheme better, overall. I played >*all* captures before the killer(s), until yesterday. Doing the killers in >between is definitely a big win... > >Another thing: I asked Bruce if it is a good idea to just skip nullmove the last >R ply. Some do that, I know at least 2 persons who do. Idea being to not allow >nullcuts on the basis of qsearch alone. So far I find it finds only very few wac >positions extra, with a worse branching factor. Also you do a lot more qnodes, >but less nodes in total. > >I think it's not such a good idea, after all. > > >Regards, >Bas Hamstra. > > > I do null move _everywhere_ except when in check. yes, doing it near the endpoints can cause problems, but the advantages seem to offset those, at least in my testing. IE this code on my PII/300 notebook gets 299 right in WAC, missing only 230. The quad xeon gets 230 inside a minute most of the time (parallel search does vary a bit). So it can't be terribly bad, IMHO... >
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