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Subject: Re: Tiger : draw by repetition score bug ?

Author: Uri Blass

Date: 07:35:05 12/22/00

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On December 22, 2000 at 09:53:27, Vincent Lejeune wrote:

>
>r5k1/pp1bnr2/4p2Q/3pPpN1/2pn4/P1q5/2P2PPP/R2R2K1 w - - 0 1
>
>Gambit-Tiger see a draw by repetition but don't give a draw score (=0.0 as
>configured), why ?

I did not look at this position but I also saw this kind of behaviour.

I payed attention that the absulute value of the score was 0.01*the number of
plies that you need to get the draw.

I am not sure if it is a bug and it may be a choice of the programmer to
differentiate between positive draws and negative draws.

When the distance to the repetition is big the distance to the 0 is bigger and
it is logical because you can be less sure about the draw when there is a long
line(Trusting long lines is more risky).

Tiger does not show stupid scores of more than +1 when it is a draw like Chess
system tal so I do not think that the scores are too risky(A score of +0.2 or
-0.2 when the distance to draw is 20 plies does not seem to be too risky).

Uri



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