Author: Uri Blass
Date: 23:18:43 08/26/02
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On August 26, 2002 at 23:34:15, Will Singleton wrote: >It's common wisdom that a good book will increase a program's strength, and I >have no doubt about it. But, what about the typical amateur book, which is >usually created from pgn files, without a great deal of hand tuning? I do not know what is the typical amateur book. The book of the latest movei that is not public is not created from pgn files but from few lines that were added manually. I usually do not test it with book but with the option of always change first move in order to avoid double games because I do not have an easy way to avoid double games without it in a match of 40 games. Movei00_76 could score slighly more than 50% against amateur2 in my test(p800 no pondering when programs use 16 mbytes for hash tables) but I suspect that against amateur lines like 1.e4 a6 can be productive so it is possible that movei00_76 with my small book could score less(I do not try movei with my small book because I do not want double games and double games can happen unless the match is of at most 4 games). I tried only 40 moves/1 minute and 40 moves/10 minutes matches if I remember correctly and it is possible that the picture could be different at longer time control(at least it seems to be the case against Ant when Movei scored more than 50% against ant at 40 moves/10 minutes and lost against ant at 40 moves/50 minutes 26-14). Note that I used movei00_761 in the second match so it is also possible that 00_761 is weaker inspite of the fact that it scored in average slightly better in the GCP test suite(there is no change in the evaluation from 00_76 to 00_761 and the only changes that I did are supposed to make the search more stable. A fast test did not suggest a big difference between 00_76 and 00_761 and 00_761 lost against 00_76 20.5-19.5 in 30 seconds/40 moves match. Uri
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