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Subject: Re: Does your program resign here? (or better: is it evaluated correctly

Author: Uri Blass

Date: 07:53:09 01/11/03

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On January 11, 2003 at 10:25:57, Andreas Guettinger wrote:

>On January 11, 2003 at 08:31:44, Lieven Clarisse wrote:
>
>>This is most probably a well known position (pasted below). But ruffian resigns
>>here (5 min/game PIII 450 64MB hash). I think this kind of situation can be
>>easily dealt with: if the evaluation score for the initial position is equal to
>>that, after 25 ply (for instance) for the best line, than the score for that
>>position should set to 0.00. In other words, if the engine can't make any
>>progress after a certain number of moves, it is draw; no mather how inbalanced
>>the material is for both sides.
>>
>>
>>[D] 7k/8/1p1p1p1p/pPpPpPpP/P1P1P1P1/8/1RK5/1R6 b - - 0 1
>
>
>I completely agree. Material may tell the programm that white is better, but if
>no progress can be made then the engine can as well output 0.00 because it
>doesn't see a win. In addition you could also easily check if the position
>allows captureing of pieces in the search tree, and if no capture can be found
>in the whole search tree, then evidence is strong that it is a draw.

This condition does not happen and program can find a lot of captures in the
search tree.

There are ways to solve the problem but not the way that you suggest.

Uri



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