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Subject: Re: Evaluation of Tactical Positions

Author: Bob Durrett

Date: 10:09:42 11/17/02

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On November 17, 2002 at 12:25:19, Sune Fischer wrote:

>On November 17, 2002 at 12:15:47, Bob Durrett wrote:
>
>I think you should read here what Bruce says about that, the solution is to
>extend with a small search to quiet out the position, it's call a quiescent
>search:
>
>http://www.seanet.com/~brucemo/topics/quiescent.htm
>
>Really you should read his whole site!
>
>-S.

I will!  I've got it on my priority list, right after the thesis I'm looking at.

Bob D.

>
>
>>The best way for a human to evaluate a tactical position is, presumably, to look
>>at lines (beginning with forced move sequences) emanating from that position.
>>
>>But I wonder . . .
>>
>>Is it possible to just look for "indicators" in the position which would
>>indicate the likelihood of a combination being present?  I have read some
>>writings of GMs in hardcopy chess books about this.  They seem to suggest that
>>positions containing combinations "smell" like a combination.  In other words,
>>the GM is alerted to the possibility of a combination even though he has not yet
>>found it.
>>
>>Assume, for the sake of discussion, that this is true.  i.e. that it is POSSIBLE
>>to detect the likely presence of a combination, without looking at any move
>>sequences.  It would be sufficient if it worked most of the time.
>>
>>If true, then it might be possible to use this to improve evaluation of
>>positions, especially leaf node positions.
>>
>>Maybe it would take a GM to specify what the chess engine's position evaluator
>>would have to look for.  But is it doable?
>>
>>Better yet, do the present-day top chess engines already do this during position
>>evaluation?  At least to some extent?
>>
>>Just a thought.
>>
>>Bob D.



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