Author: Jasmine Baer
Date: 16:52:03 12/14/03
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On December 14, 2003 at 13:26:33, Richard Sutherland wrote: >Well, I know you all probably know this already, but although Shredder is the >World Champion I am a little surprised at the ease with which it is crushing >Chess Tiger 15 in my mini-match right now. I am playing an auto232 match between >two identical PC's (Intel 2.54Gb) an game in one-hour and Shredder is leading >5-0 with two draws at this time. > >Wonder if there is some tweaking I need to do? I have the following engines that have a go on www.playchess.com. Here are their performances against Shredder 7.04: 1. Fritz 8 (2+ 1= 1-) 2. Hiarcs 9 (3+ 9= 5-) 3. Chess Tiger 15 (2+ 5= 5-) 4. Junior 8 (0+ 4= 3-) (No Shredder, because I'm waiting for Shredder 8) All are running under their default parameters. My PC is a P4 2.0 GHz, and these are Blitz games (mostly 5' + 0", but with a few 3' + 2" and others sprinkled in the mix). I set the hash tables to 64 MB. The opening books that I use for all these engines were created by extracting games from my TWIC database in which at least one player in each game was rated >=Elo 2500. I think I started out with about 189,000 games. After each day of play, the games for each individual engine are imported into the opening book so that it can "learn" from its experience. EACH ENGINE HAS THEIR OWN BOOK. They may have started out identically, but the books are now slightly different. Currently, they've only imported around 60 new games each, so I don't think it has had much of an effect on the book. I'm hoping that over time each engine's book will become more and more unique, leading to a more customized book? At some point in time, I will filter out the games by each engine, reset the weights in the book, and use each engine's games as a means for the book to "Learn." This way, they book is more influenced by the games played by the engine. I'll probably do this after each engine has racked up 500+ games against a variety of competition over the 'net. Anyway, just this non-programmer's 2 cents.
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