Author: Ricardo Gibert
Date: 13:58:46 10/09/02
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On October 09, 2002 at 15:36:13, Mike S. wrote: >On October 09, 2002 at 14:23:03, Robert Hyatt wrote: > >>(...) >>I've given some examples of things I've had to fix after watching GMs pick on >>the same hole >>over and over. Today I don't see those huge holes cause me a lot of trouble >>(yes I still have >>holes, to be sure, but not the building-sized holes some "tactical" programs >>possess..) and I >>don't particularly care if queens come off early or not. (...) > >I've added Crafty 18.x results from the same database: > >Percentages, based on a large comp-comp database: > >Engine | #Games total W B | total eQE* W/eQE B/eQE >------------------------------------------------------------------- >Fritz 7 | 784 69% 72% 65% | 59% (#57) 53% 67% >Chess Tiger 14 | 850 66% 71% 62% | 72% (#71) 73% 71% >Shredder 6/-P. | 743 61% 65% 57% | 58% (#58) 63% 53% >Junior 7 | 799 55% 58% 53% | 41% (#60) 25% ! 56% >Crafty 18.x | 741 48% 48% 47% | 51% (#52) 51% 52% > >*) "eQE" = early queen exchange (within the first 10 moves) > >This illustrates precisely what you wrote. The eQE obviously is no threat at all >for Crafty :o). The percentages are a bit higher even, similar to Tiger's, which >indicates the good endgame strength (of both). Or the other interpretation is that with a roughly 50% score, Crafty is merely average among chess engines in the ending. Like I indicated in my other post, you can't really draw any reasonable conclusions from these statistics. Too many variables are unaccounted for. > >(Btw. the games were against a bandwith of engines including i.e. various other >top engines and freeware, not only the ones mentioned.) > >I think the strength of Fritz in tactics / king attack could compensate for the >lesser good endgame strength, if only Kramnik would not be able to exchange >queens during the book variants already, always. But I don't know if an opening >book could be built, which strictly avoids variants with early queen exchanges. >Maybe for the next match :o). > >For engines playing Black, an anti-fritz (and anti-junior) book which favours >variants with queen exchanges would also be interesting IMO. I didn't find a way >to generate such a book automatically (probably impossible "the easy way", >because the exchanges are not directly related with the results, and also such a >book must not have big holes in other "non-exchange" variants...) > >Regards >M.Scheidl
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