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Subject: Re: Question regarding GS 2930 test suite position #13

Author: Uri Blass

Date: 23:31:37 05/21/01

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On May 22, 2001 at 01:40:05, Miguel A. Ballicora wrote:

>On May 22, 2001 at 00:02:01, Robert Hyatt wrote:
>
>>On May 21, 2001 at 15:18:36, Ingo Bauer wrote:
>>
>>>Here is the right diagram:
>>>
>>>[D]2r2rk1/p1q1bpp1/1p6/n2R4/8/P4N2/1B2QPPP/5RK1 w - -
>>>
>>>Following Kasparov, Bxg7 is the winning move. Its from a Game Kasparov -
>>>Poritsch 1983. More infos about the complete Test at:
>>>http://mitglied.tripod.de/ChessBits/index.html
>>>And the un the buttom line GS290. Its in German but the Test should be
>>>understandable.
>>>
>>>Ingo
>>
>>
>>Would be funny if DB Jr is right.  Be nice to tell him "who" found the
>>"best" move there.  :)
>
>This line is facinating, there are some hidden tactics that are not in the PV
>that are beautiful, for instance at the end, instead of Qa8, Qb7 looks better
>but Ng6!! is excellent (Qxe7/ Nxe7+ Kh7/ Rh5#) and if Rb8 / Rh5! fxg6/ Qe6+ Qf7
>/Rh8+ +- (Carbon analysis).
>White is threatening at all times Qh4 and it is nice how the white pieces
>coordinate to threat Rh8# and have everythind defended. That is why Black
>manouver to force the white king to be in h4.
>
>BUT, Bxg7 is a winning move, no doubt about it, and easier for a human to
>evaluate.

I have clear doubts if Bxg7 is winning.

Can you give me a tree that proves that white has clearly more than +1
evaluation.

Uri



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