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Subject: Re: Position from yesterday, Rxc7!!, problem for all Rybka versions.

Author: Uri Blass

Date: 14:27:35 02/09/06

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On February 09, 2006 at 13:00:39, Andreas St. wrote:

>Hi,
>yesterday i posted this position:
>
>2r5/2pR1pk1/p1P3p1/P2K4/5P1p/5P1P/8/8 w - - 0 1
>
>and some users said, Rybka finds the solution.
>
>>Not Rybka 13b, but Rybka 1.0 Beta 32-bit (the first version!!!)
>>Best regards,
>>Orlando
>
>>Rybka 1.0 Beta 32-bit, sees Rxc7 quickly. I've no idea how the person testing
>>whatever version had this failure.
>
>>Terry
>
>
>What do you mean??? No Rybka version finds the only winning move Rxc7!


Are you sure that it is the only winning move.
Do you have a proof that f5 does not win?


>If you analyse long enough, you will see, all Rybka versions prefers f5.
>At the latest after one hour no Rxc7, but f5!
>And look at the score of rybka. He sees nothing in this position.
>Fritz 9 for example has +3.50 after 42sec.
>Shredder 9 after 0 sec.! After 17sec. Score +3.05

As Albert silver proved high score proves nothing here and Fritz9's score goes
down later.

Uri



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