Author: Matthew Hull
Date: 06:41:14 03/03/05
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On March 03, 2005 at 08:49:08, Andrew Wagner wrote: >This is an impressive result. Did you tinker with GNUChess' code at all? What >opening book are you using? It didn't look like it out-booked crafty. Any >thoughts on why it performed so well? This GNUChess is stock. The book is also the stock GNUDhess book (which took all night to process from the 160,000 pgn file, BTW). The only tweak I did was to implement GCC PGO profiling. This mormally breaks, but for some reason, it works on my old PIII 500mhz desktop (RH9). So I built it with PGO on the old machine and now run it on the less-old machine. :) Perhaps someone who has studied GNUChess 5.07 can contribute more on it's level of sophistication. It seems to be basically sound, but not a particularly deep searcher. A 64 bit machine might give it a significant speedup, since it is a bitboard program. To be fair, I've suspected that Crafty has some kind of "hole" in it somewhere, since 19.15. It plays the endgames better than it has ever played them, but sometimes it loses it's way in the middlegame. Just an "impression" from watching many games it's played on ICC. Matt
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