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Subject: Re: qSearch and stand pat question

Author: scott farrell

Date: 07:58:04 11/04/03

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On November 04, 2003 at 10:17:19, Tord Romstad wrote:

yeh, I scale back if there is a knight or bishop around, as you can sac the
knight/bishop onto the passed pawn pair, and ussually consume both passed pawns.
So it equals a KNIGHT instead of a ROOK in terms of eval.

never thought of scaling back for a queen - I leave this to the search.

Scott

>On November 04, 2003 at 09:53:16, Daniel Clausen wrote:
>
>>I don't have much experience when it comes to evaluate such positions with my
>>engine, but are you sure it's a good idea to evaluate two connected pawns on the
>>7th row at least one rook? Are there more positions where this is right than
>>wrong?
>
>If you do it more carefully, I don't think the risk is very big.  My impression
>is that I win more games than I lose because of high passed pawn scores.
>
>>I can imagine that chances that this is good are rather high when there are no
>>queens around anymore. But with queens still on the board I can imagine lots of
>>checks which capture one pawn and give check at the same time, which quickly
>>nullifies the advantage again.
>
>Yes, you definitely should consider the material left on the board when
>evaluating advanced passed pawns.  I scale the passed pawn evaluation
>depending on the amount of material left, and subtract a further amount
>if the opponent has a queen.
>
>Tord



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