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Subject: Re: Random factor in static evaluation!

Author: Tiago Ribeiro

Date: 22:57:08 06/15/01

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On June 15, 2001 at 17:16:30, Eugene Nalimov wrote:

>Without *lot of care* you will see search instabilities. Imagine, for example,
>that you are using aspiration search, and searching the move with bounds (alpha,
>beta). Search returned some value that is greater than beta. You start research
>with bounds (beta, +infinity). But due to the randomness the critical position
>now has score less than beta, so you'll end up having fail-high followed by
>fail-low -- not very pleasant situation.

No! The constants assumed random values only when loading the engine, no during
game!
So, you acquire new values (new 'personality') only when you turn off  and load
engine again!

Tiago



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