Author: Bas Hamstra
Date: 09:41:07 08/08/99
Bob, I read that thread with interest. I am experimenting with the qsearch (and SEE) too. Currently I use only check evasions in the qsearch. I don't like it when the qsearch stumbles per accident on a mate and it doesn't see it's a mate. And it returning a bogus Eval because Eval was > Beta. With evasions only that won't happen. It doesn't cost an awful lot of nodes and it sees mates quicker. And I can confirm that SEE ordering doesn't give a great reduction in treesize but throwing out losers is a win. However I did a MVV/LVA scheme while only throwing out "obvious" losers. That is, when A > D and after the capture A is hanging, throw it out. That's much faster than SEE. If I'm not mistaken it did not do much worse than SEE. (tried to reply to some posts yesterday, but couldn't post) Regards, Bas Hamstra.
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