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Subject: Re: Material vs Positional Assessments

Author: Jay Scott

Date: 12:19:46 01/08/01

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On January 07, 2001 at 20:57:46, Ricardo Gibert wrote:

>My question is: Do any programs take this into account or do they all consider
>the 2nd pawn they grab to be as valuable as the 1st?

I think that programs which take this into account do it by scaling the
positional score rather than the material score. By tradition, the value
of a pawn is constant.

I believe this does cause some mistakes in pawn-up and pawn-down
positions. Programs are sometime too willing to take a second pawn.

This is one of the reasons that I keep recommending a probability-to-win
or a decision-theoretic utility evaluation function over a traditional
material-based evaluation.

  Jay



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