Author: Albert Silver
Date: 20:22:09 01/11/06
Since I am not fond of random openings to test something as specific as which
settings are best, I ran two full matches using the Noomen Select positions
against Fruit 2.2 to test the Neutral and Optimistic settings of Rybka Beta 9.
For those who aren't familiar with them, the Noomen Select positions are a set
similar to those of the Nunn2 set, except there are 40 (leading to 80-game
matches) and they were chosen by well-known opening book designer Joeroen
Noomen.
The results were interesting, and showed a marked improved performance for the
Optimistic settings.
Match conditions were:
Athlon64 3500+ (Venice) + 1GB Ram
Time control: 10mins + 2sec increment
Ponder off; 256MB hashtables each
Noomen Select positions
Noomen-RybkaB9Neutral-Fruit22 2006
1 Rybka 1.01 Beta 9 32-bit 2900 +6 +34/-21/=25 58.13% 46.5/80
2 Fruit 2.2 2850 -6 +21/-34/=25 41.88% 33.5/80
The GUI said Rybka performed 56 Elo over Fruit 2.2 using the Neutral settings.
Noomen-RybkaB9Optimistic-Fruit22 2006
1 Rybka 1.01 Beta 9 32-bit 2900 +52 +36/-13/=31 64.38% 51.5/80
2 Fruit 2.2 2850 -52 +13/-36/=31 35.63% 28.5/80
Here the GUI said Rybka performed 102 Elo over Fruit 2.2 using the Optimistic
settings.
In order to gather more data I'll run a shorter Nunn2 match (only 40 games)
against Gambit Fruit 4bx, which had been the first Beta's toughest opponent in
the Nunn2 set aside from Fruit 2.2 in my testing.
The rating of 2850 for Fruit was taken from the latest SSDF list, and Rybka's
2900 was chosen arbitrarily.
Albert
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