Author: Uri Blass
Date: 10:54:15 12/22/00
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On December 22, 2000 at 11:54:21, Uri Blass wrote: >On December 22, 2000 at 09:52:28, Vincent Lejeune wrote: > >> >>[d]2r1k2r/5pp1/4p3/ppqpP3/4bQPP/1B6/PPP2R1R/2K5 b k - >> >>a4 ! is very strong (1...a4 2.Qf7 Kd8 3. Qxg7 Qe3+ -+) but Tiger (2 versions) >>doesn't see this move >> >>How do perform other engines here ? > >Tiger considered a4 for many minutes at depth 15 but could not find a fail high >even after 30 minutes of considering a4(the score for Rc7 is 1.16 for black). > >It is strange because if I tell tiger to search only a4 it can find a score of >+1.70 at depth 13 in a few minutes. > >If I can compare these 2 numbers then there is no logical reason for tiger not >to see a4 at depth 15(I can understand not seeing it at smaller depthes because >of pruning when tiger used less than a minute for a4) > >Uri I can add that Tiger needed almost 2 hours to see a4 at depth 15 and I think that it may be better to tell tiger to search only a4 to the smallest depth that was not searched in the past if you see that it is using a lot of time for a4. In the example that was posted it could help tiger to find a4 faster and without it tiger has a terrible branching factor at depth 15. Uri
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