Author: Uri Blass
Date: 07:11:18 09/01/04
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On September 01, 2004 at 05:57:25, martin fierz wrote: >On September 01, 2004 at 00:51:47, Stuart Cracraft wrote: > >[snip] > >Muse on P4 2.4GHz finds the mate at ply 6, failing high on Qxf4 after 0.7 >seconds (not shown in the logfile). > >the reason it can solve this at such a low search depth is probably twofold, the >first is that it generates checks in qsearch on the first ply of the qsearch (so >when you drop directly into qsearch with a nullmove, it will see Rh8# every >time), the second is probably that it is using mate-threat extensions. > >cheers > martin Do you get 2 plies only by mate extensions? In order to do it you need to extend 2/3 ply for mate threat. The line 1.Qxf4 Bxf4 2.Rxh5 gxh5 3.Rxh5 Bh6 4.Rxh6 is 7 plies and qsearch here does not see mate because it is black to move so I need 8 plies even if I disable pruning by evaluation. With pruning by evaluation latest movei get it only in 10 plies but I think to change my pruning to make it see it faster. Uri
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