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Subject: Re: Rybka ... THE BAD (analysis)

Author: Yuriy Lyapko

Date: 22:47:05 01/10/06

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On January 10, 2006 at 03:32:03, Majd Al-Ansari wrote:

>Actually after further analysing this position I have come to the conclusion
>that it is indeed a DRAW after Kf5! instead of Kh5?  So the human intuition was
>correct ;}   Black can draw this quite easily by waiting for white to commit. If
>white commits white manages to gobble up the white pawns in time for a Queen
>just as white pawns.
>
>After Kf5!
>
>[D]8/5p2/8/pp3k2/3P3p/7K/PP4P1/8 w - - 0 2
>
>Now if Kxh4 then Ke4! is a draw.  This is confirmed by Fritz 9, Fruit 2.2.1 and
>Shredder 9.1 all in less than 5 seconds .... The only engine giving a heavy plus
>for white after reasonable amount of time is Rybka (I stopped Rybka analysis
>engine after 10 min with Rybka showing +2.56 for white).  Obviously Rybka needs
>some more endgame knowledge in these kind of simplified pawn endgames.

Try to deny EGTB access in all those 3 engines (or simply hide KPPKQ tablebase)
and you will see, that all of them are same blind as Rybka...

Best regards,
George



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