Author: Dann Corbit
Date: 10:14:27 03/03/05
Go up one level in this thread
On March 03, 2005 at 09:41:14, Matthew Hull wrote: >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. I would not take too much from two games at high speed. If GnuChess wins in a tournament of 30 games, then it is time to raise the eyebrows.
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