Author: martin fierz
Date: 23:39:28 09/01/04
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On September 01, 2004 at 10:11:18, Uri Blass wrote: >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. hi uri the reason must be that after 2.Rxh5 i get a mate threat extension and after 3.Rxh5 again, and since i do a full ply for that, my program sees it. cheers martin > >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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