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Subject: Rybka 13 parameter tests: UltraSolid plus Deteriorating and Improving

Author: Albert Silver

Date: 08:12:13 01/27/06


As posted previously, Rybka performed slightly better with Deteriorating and
Improving set to Slightly Optimistic and Much More Pessimistic respectively. I
am now testing the very same, but with UltraSolid added, and after the first 2
matches against Fritz 9 and Hiarcs 10 (Hypermodern) it is scoring a bit more. A
3rd match against Fruit 2.2 will follow. Note that I don't have EGTBs installed,
so Beta 13 is the same as Beta 12 here. I consulted Vasik about this.

Test conditions are:

Athlon64 3500+ (Venice) + 256 MB hash
Time Control: 3m + 2s
Ponder = off; 256Mb Hash each
Silver Suite - Short (25 positions)

The default settings against Fritz 9 and Hiarcs 10 (Hypermodern) scored:

1   Rybka 1.01 Beta 12 32-bit  2900  +22/-11/=17 61.00%   30.5/50
2   Hiarcs 10                  2850  +11/-22/=17 39.00%   19.5/50

1   Rybka 1.01 Beta 12 32-bit  2900  +19/-15/=16 54.00%   27.0/50
2   Fritz 9                    2820  +15/-19/=16 46.00%   23.0/50

Total: 57.5 / 100

------------------------

Improving Position = Slightly Optimistic
Deteriorating Position = Much More Pessimistic.
The rest at default.

1   Rybka 1.01 Beta 12 32-bit  2900  +27/-7/=16  70.00%   35.0/50
2   Hiarcs 10                  2850  +7/-27/=16  30.00%   15.0/50

1   Rybka 1.01 Beta 12 32-bit  2900  +20/-15/=15 55.00%   27.5/50
2   Fritz 9                    2820  +15/-20/=15 45.00%   22.5/50

Total: 62.5 / 100

-------------------------

1   Rybka 1.01 Beta 13 32-bit  2900  +26/-11/=13 65.00%   32.5/50
2   Hiarcs 10                  2850  +11/-26/=13 35.00%   17.5/50

1   Rybka 1.01 Beta 13 32-bit  2900  +26/-14/=10 62.00%   31.0/50
2   Fritz 9                    2820  +14/-26/=10 38.00%   19.0/50

Total: 63.5 / 100

                                       Albert



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