Computer Chess Club Archives




Subject: Re: Secrets of Rybka and Fruit from my point of view

Author: Sergei S. Markoff

Date: 17:03:47 12/15/05

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>Really? Just the line from fruit:eval.c:
>  eval = ((opening * (256 - phase)) + (endgame * phase)) / 256;

No. Not just this line, but the concept and well tuning.

>I find that VERY hard to believe. That concept has been around a
>very long-time.

Really? Where it was introduced by the first time?

There was a lot of material-dependent evaluatation factors, but its was tuned
independently. The result for the most engines that used this approach was bad
consolidation ability.

>We need specifics. I see nothing special about Fruit 2.1 evaluation
>to explain the strength.

Lets experiment with it. It's easy to remake Fruit search to make it same to the

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