Computer Chess Club Archives




Subject: Re: passed pawn evaluation.

Author: Robert Hyatt

Date: 10:04:27 01/12/04

Go up one level in this thread

On January 12, 2004 at 11:07:19, Daniel Clausen wrote:

>On January 12, 2004 at 10:02:07, Robert Hyatt wrote:
>>give white two pawns on d2/e2.  Give black two pawns on a2/h2.  Both kings
>>in the center.  Which side do you like?  :)
>Black - even if the black pawns wouldn't be so advanced and would still be on
>a7/h7. :)
>Problem is, I wouldn't really know what to code here. Of course you can code
>something so the engine won't exchange all pieces so it won't end up in this
>hopeless situation. But maybe it would be better to not let this pawn structure
>occur earlier in the game already, even if there's still pieces on the board.
>Sheesh, hard decision! :)

What you do is scale the connected bonus to material, and inversely scale the
isolated (passed) penalty to material.  More material, connected is better,
less material, they are equal, no material, isolated are way better...

This was somthing pointed out to me by Roman (GM) on ICC a few years ago.  I
told the story here multiple times and won't repeat unless someone asks...

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