Author: Jon Dart
Date: 12:25:24 01/31/02
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On January 31, 2002 at 14:31:12, Dann Corbit wrote: >I don't remember GCP's book algorithm. I suspect that both programmers used the >same source for their opening book. Many "automatically generated" opening >books just consider that any move a GM has played must be good, and especially >if it has been played twice. Some opening books do not even consider if the one >who made the book won or lost the game! > As I discussed earlier, I implemented a "selectivity" parameter for Arasan and used it for the 2nd weekend of the tournament. I had it set to 70, so no moves that had a score <70% of the highest-scored move would be played. I had already excluded low-frequency moves (except those in the "basic" book, which is hand-constructed). The selectivity did seem to help but Arasan did in one game still get a bad opening (against Hiarcs, if I remember). At least it didn't play the King's Gambit as white (which it did in a previous CCC againt Fritz), or the Benko Gambit as Black (which it did once against Crafty). Fritz got it out of book early and killed it, and in the Crafty game it never had any visible compensation for the pawn. --Jon
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