Author: Uri Blass
Date: 19:41:37 04/18/05
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On April 18, 2005 at 22:29:09, Uri Blass wrote: >On April 18, 2005 at 21:32:59, Jeremiah Penery wrote: > >>On April 18, 2005 at 07:24:11, Uri Blass wrote: >> >>>part of the problem is check extensions and part of the problem is probably >>>pruning based on evaluation together with other factors that I should improve. >> >>Why should check extensions make any difference in this position? Neither side >>should be giving any checks. > >The problem is that most of the search time is not on the right line but in what >happens after queen promotion. > >Movei cannot find the knight promotion in a reasonable time(I did not try more >than 30 minutes on a fast PC) but almost all the search time is on queen >promotion. > >After performing the knight promotion finding the mate is easy for movei. > >Uri Note that check extensions was only a thought and I am not sure that it is the problem. single reply extensions after queen promotion may be a bigger problem(single reply extensions are done also after a knight promotion but they do not help much because depth reductions that is not null move pruning are also used and probably they are used more after knight promotion). Uri
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