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Subject: To Christophe and Ed: a bit more SelSafety seems to make GT II stronger

Author: Fabio Barrettone

Date: 02:03:40 04/20/01


Well, at last I think so from my experiments with an Athlon 950 256Mb of RAM.
I've done 400 games against Yace (at 40/10m, sorry not too much time for longer
time controls) with default settings and the result was 59% vs 41% in favor of
Gambit II (I don't know about Chess Tiger 14.0 yet), using ERT (24Mb of hash for
both the engines, and a book prepared by me for Yace).

I've redone the same match (overwriting learning of Yace and Gambit) with
SelSafety=12 (too much seems to be at the contrary overproductive) and the
result has been 82% vs 28% in favor of Gambit. Now, I don't think 400 games and
a so large difference is a casuality.

I've also done the complete Nunn test against Fritz6b (sorry, don't have Deep
Fritz) and also in the Sveshnikov, where GT seems to have big problems against
Fritz, with SelSafety=12 it was able to win with white and draw with black,
where with the default settings it lost with both white and black.

Well, I've not had the time to test further this theory, but maybe, Christophe,
with your home-made benchmarks, you could tell if my theory is wrong or not.
Just my little 2$ on a thing I've noticed (for a casuality).

Now I'm actually testing with Junior and Hiarcs, next with Chessmaster (Kurt and
default settings).

In the end a question: in the Chessbase version there's a ct.ini? I hope so,
since I have only a computer and it's a real pain to enter the moves manually
for engine vs engine matches.

Sincerely,
Fabio.



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