Author: Kolss
Date: 05:52:26 04/15/05
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On April 15, 2005 at 06:01:05, Tord Romstad wrote: >I wonder why Crafty, Rebel and The King have problems with this position. >Glaurung does not use any special tricks, except the usual extensions for >checks, single-reply-to-checks, mate threats and checks at the first ply of >the qsearch. I would expect most programs which use all of these common >extensions to find this mate in just a few seconds. > >Tord Hi Tord, In my experience, times to find these mates highly depend on the value of the single-reply-to-check extension. If you do not use fractional plies, this will explain why you find the mate amazingly fast. If I recall right, changing this extension by e.g. 1/8 ply can drastically affect solution rates for such problems (=> easy experiment to do...). Best regards - Munjong.
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