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Subject: Re: When to resign

Author: Ricardo Gibert

Date: 14:13:00 09/01/99

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On September 01, 1999 at 12:41:41, Alan Grotier wrote:

>
>
>At what negative evaluation figure is it reasonable to assume that a chess
>program can nolonger defend the position and will lose the game?
>
>Alan

I'm still in the pre-coding stage in designing my 1st chess program, but my 1st
stab at it would be -3 material AND a -1 positional score. The material score I
would adjust by 1 pawn for every 200 rating point difference. This would be
sensitive to the efficacy of your eval, but I figure if it is down material AND
it has a positional disadvantage to boot, resignation would seem appropriate.

An example of the type of positions you will want your program to avoid
resigning in can arise from the following endgame studies:

Troitzky 1930: 8/3kP3/3br1P1/6P1/7K/8/8/7B w - - 0 0

Chekhover 1947: 7r/p3k3/2p5/1pPp4/3P4/PP4P1/3P1PB1/2K5 w - - 0 0



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