Author: Miguel A. Ballicora
Date: 07:30:12 12/27/01
Go up one level in this thread
On December 27, 2001 at 07:11:57, Uri Blass wrote: >On December 27, 2001 at 06:58:41, Gian-Carlo Pascutto wrote: > >>On December 27, 2001 at 03:51:22, Uri Blass wrote: >> >>>The only problem that it could not solve in a reasonable time >>>is WAC 2 >>>I guess that it needs depth 13 in order to solve it >>>and the estimated time that >>>it needs to get this depth is at least some hours. >> >>Nothing to worry about. WAC 2 is hard, both for search >>and eval. I get it at ply 11-13 depending on the extensions. >>Usually 10-30s on Athlon 1000. >> >>>The hardest problem for it >>>(from the problems that it solved) was WAC 22 >>>but I consider it as a positional problem because >>>there are many moves that win a pawn for white to get equality >>>in material. >> >>>Qh5 is one of them and my program found Nxf7 at depth 4 >>>but changed it's mind at depth 6 to Qh5 only to change >>>it's mind later again to Nxf7 at depth 7. >> >>I get +1 for white with Nxf7 at 13 ply. >> >>After playing out Qh5 I get g6 and BLACK up 0.70 pawns. >> >>So Qh5 looks a lot worse as Nxf7 for my program. >> >>-- >>GCP > >I agree that Qh5 is worse than Nxf7 but for positional reasons > >If you use only material evaluation both moves lead to equality and > >My program has now no evaluation except piece square table >and I prefer to test it to see that it has no bugs >before adding new evaluation terms. Then just forget about this position. Besides, it is positional rather than tactical. Miguel >There are other moves that lead to equality from material >point of view and Ba2 that is written as one of the solution >is one of them. > >Yace(only material) evaluates Qh5 as 0.00 and later >changes it's mind to believe that it is losing material and >later changes it's mind again to 0.00 so maybe my program >found that qh5 is losing material and I did not check it >(it only gives main line and score in the end of the iteration >and I am going to change it). > >Uri
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