Author: Gian-Carlo Pascutto
Date: 07:47:59 01/01/00
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On December 31, 1999 at 17:51:13, Ernst A. Heinz wrote: [snip] >Please also note that normal futility pruning at frontier nodes with >a remaining depth = 1 and extended futility pruning at pre-frontier >nodes with a remaining depth = 2 are two different flavours of futility >pruning in the main search. The most important difference being that one is sound and the other isn't, right ? [...] >Just treat the selective score as a lower bound. Because you did not >search some moves at all, the real score might actually be better. Thanks for the help. I've added the whole bunch to Sjeng and it seems to give *big* gains with no noticable loss of tactical strength. I'm going to try them for bughouse/crazyhouse too...I suspect that will give even better results. -- GCP
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