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Subject: Re: Tiger evaluation function

Author: Ernst Walet

Date: 00:01:27 04/11/01

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On April 10, 2001 at 23:23:21, Derek wrote:

>This position is a study that I saw on the following website:
>http://www.chesscafe.com/endgame/endgame.htm
>
>White: Kc5,Nd5,Ng6,Bh7
>Black: Ka5,Ba2,a3
>
>White to move
>
>Rebel-Tiger 14.0, using all 3,4, and 5-man tablebases
>
>After the moves:
>
>1.Nc3 Bb1 2.Nxb1 a2 3.Nd2
>
>Tiger analyzes 3...a1=Q as lost for Black, but shows 3...a1=B as a draw for
>Black. This is clearly incorrect, as after 4 Nb3+ Ka4 5 Nxa1, it's evaluation
>changes to show that Black is mated in 10 moves. Is this a serious evaluation
>error in the program?


What happens if you disable the tablebases?

Ernst.



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