Author: Albert Silver
Date: 14:55:43 12/24/05
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On December 24, 2005 at 16:43:16, Nolan Denson wrote: >Maybe it has something to do with what version you are using. I using the 64 >Bit version while playing on PlayChess. I tried the others but, for me ST >played much much better. How many games and what were the test conditions? I tested the VP, SP, and ST under identical conditions over 160 games for each. Meaning the same 4 opponents, using the Nunn2 set. The final results were: Rybka 1.0 "very positional" (default) vs. Deep Fritz 8 24 - 16 vs. Chess Tiger 15 30.5 - 9.5 vs. Fruit 2.2 25.5 - 14.5 vs. Gambit Fruit 4bx 25.5 - 14.5 Rybka 1.0 "slightly positional" vs. Deep Fritz 8 30.5 - 9.5 vs. Chess Tiger 15 29 - 11 vs. Fruit 2.2 27 - 13 vs. Gambit Fruit 4bx 21.5 - 18.5 Rybka 1.0 "slightly tactical" vs. Deep Fritz 8 24.5 - 15.5 vs. Chess Tiger 15 27.5 - 12.5 vs. Fruit 2.2 23 - 17 vs. Gambit Fruit 4bx 24 - 16 Athlon64 Sempron 3400+ Hash: 256 Mb each; ponder off Time Control: 10 mins + 2 secs Nunn2 Openings Set In order to give a rough idea, I gave the opponents ratings as follows in order to see a comparative Elo performance of the Rybka settings: Fruit 2.2: 2830 Gambit Fruit 4bx: 2800 Deep Fritz 8: 2780 Chess Tiger 15: 2730 This would yield the following performances for the Rybka settings over 160 games each: Rybka "VP" - 2913.25 Rybka "SP" - 2915.75 Rybka "ST" - 2878.5 So while the difference between VP and SP is up in the air in this short amount, ST is clearly lagging. Albert
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