Author: Bas Hamstra
Date: 03:20:59 01/27/02
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[D]r2r1bk1/ppqb1ppp/2p1p3/6P1/2PPN3/PB3Q2/1P3P1P/1K1RR3 w - - Nf6!! Tao solves this in a couple of minutes (I believe 4 minutes to resolve the fail high). But with futility pruning turned on it doesn't. I am curious how it affects Fritz solution time. Fritz and CM see it pretty quick, in about 2 minutes. Best regards, Bas. On January 27, 2002 at 03:59:21, Ernst Walet wrote: >On January 26, 2002 at 20:02:29, Bas Hamstra wrote: > >>On January 26, 2002 at 16:42:23, Ernst Walet wrote: >> >>>On January 26, 2002 at 12:48:46, German Rodriguez wrote: >>> >>>>When I click on defaults in the F7 engine parameters, futility pruning is >>>>enabled as default on my copy. No one has brought this up, so is it just me that >>>>this happens to? >>>> >>>>Won't this do more harm than good in longer time controls and therefore should >>>>it be left unchecked? >>> >>>Yes I noticed it too and futhermore the option for mate extentions is gone. >>> >>>I haven't found a position though where this pruning resulted in not finding a >>>move, or taking much more time. Maybe someone else did? >>> >>>Ernst. >> >>Try the move Nf6+!! that Ponomariov played with and without. >> >>Bas. > > >Can post the position for me, Bas? > >Thanks, >Ernst.
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