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

Author: Miguel A. Ballicora

Date: 07:09:03 05/22/01

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On May 22, 2001 at 02:31:37, Uri Blass wrote:

>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

The game itself looks convincing to me.
Bxg7 Kxg7/ Ne5 Rfd8/Qg4+ Kf8/Qf5! f6/ Nd7+ Rxd7/ Rxd7
Material is balanced but the knight is out of the game for a couple of moves
and the unsafety of the King should count for +1.00 at least. Q+R+R against
a naked king is bad... Black has a lot of problems and suffer terribly through
light squares.

Regards,
Miguel




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