Author: Michael Henderson
Date: 06:45:25 09/02/04
Go up one level in this thread
On September 02, 2004 at 02:39:28, martin fierz wrote: >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 is recapture extension also playing a role here?...if that applies.
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