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Subject: Re: Rybka bug??

Author: Vasik Rajlich

Date: 16:10:15 01/29/06

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On January 29, 2006 at 17:40:16, George Tsavdaris wrote:

>On January 29, 2006 at 17:26:10, Sebastian Leibnitz wrote:
>
>>My brain needs sleep, so Ill only make a small post:
>>
>>
>>
>>
>>Rybka (orig beta)
>>
>>
>>
>>[D]rn2k2r/pp3ppp/1q2b3/8/2pN1p2/B7/P3Q1PP/3R1RK1 w kq - 0 5
>>
>>In this position Rybka (after several minuites) wants to play
>>
>>Rxf4?? (-2.40)
>>
>>
>>If I play Kh1 by hand
>>
>>[D]rn2k2r/pp3ppp/1q2b3/8/2pN1p2/B7/P3Q1PP/3R1R1K b kq - 0 5
>>
>>--> Rybka sees a white advantage (almost) immediately
>>
>>
>>
>>Going back (with filled hash tables) doesnt change a thing...
>
> I noticed the same "problem" too. In the above position where it wants to play
>Rxf4 and shows a -2.00 score (for Kh1 also), if i change engine and then change
>back to Rybka or just click "clear hashtables" then Rybka behaves correctly.....
>So it must be a hashtables problem.....

George, Sebastian,

I can't produce this here. If you could please give me the steps to produce it
(via email would be great, vrajlich at yahoo dot com), I will take a look.

It looks like a hashtable problem.

Vas



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