Author: Pallav Nawani
Date: 11:53:03 08/04/04
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On August 03, 2004 at 15:04:54, Cesar Contreras wrote: >Hi > >I'm working on extended futility prunning and it's not working, it seems to make >a node reduction, but it plays worse than without it. > >My question is, do any of you have seen good improvement using extended futility >prunning? > >what normal futility margin do you use? >what extended futility margin do you use? > >Thank you. Works very well for me (Natwarlal). I think I am getting a ply extra depth from Futility pruning/reductions. But this could just be because I have very bad moveordering (50% first move cutoff rate). Where pruning really shines is in endgame. I get 2-5 extra plies because of the (heavy?) pruning I do, some times even more. Pruning hurts tactical strength a bit, especially for a simple program like mine. Source for my program, is available, you can look at it if you like. Also, you can turn futility on/off or change pruning margins from the config file, Natwarlal.ini. Hth, Pallav
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