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Subject: Re: Rebel Performance Rating

Author: Enrique Irazoqui

Date: 06:37:36 09/19/99

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On September 18, 1999 at 17:44:11, Stephen A. Boak wrote:

>By the way, the Rebel Century Performance Rating for the match today was:
>         >>  2553  <<
>which is certainly in the range of Grandmaster ratings.

Rebel's TPR so far is roughly 2480, which is not GM level. Ten games are not
enough to know much, but taking into consideration that Rebel is the program
that scored the best in Aegon over the years, this tpr seems to indicate that
programs do not reach GM level yet at slow time controls and against motivated
GMs. One more thing: considering that Rebel played these games with a hardware
much faster than a P200MMX, it seems clear that the SSDF list is quite inflated,
maybe by some 150 points.

I think that someone has been saying all this for years. Hi Bob! :)

Looking at the few 40/2 games played so far by programs against strong human
opponents, I wonder if results wouldn't be similar if played against 2300
people. The positional superiority of a 2300 player is still immense, and for
them it might be a matter of avoiding tactics, as wise IMs and GMs do when
playing computer programs. Maybe the Elo system works differently for programs?

Aside form this, I don't think it makes sense to use the same opening book in
comp-comp and in human-comp games. It is quite absurd to play openings that lead
to positional games, where programs are quite dumb, and this is happening too
often. Is it not a better idea to build a gambit-like book that tries to open
the game and play tactics? Same for playing style. A program can afford to play
the Orthodox against another program, because neither will understand a thing,
but against a strong human player it's a mistake. Look, for instance, at Rebel-2
yesterday.

Enrique




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