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Subject: Re: Maróczy vs. Tartakower sacrifice

Author: Jürgen Hartmann

Date: 04:56:13 12/05/98

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On December 04, 1998 at 06:05:10, blass uri wrote:
>
>On December 04, 1998 at 05:29:33, Jürgen Hartmann wrote:
>
>>The thing I enjoy to do with a chess program is interactive analysis. Trying
>>different lines with a program gives you the illusion to do something
>>intelligent and achieves superior results to just letting it run endlessly on
>>one position on its own.
>>
>>In the famous game Maroczy vs. Tartakower from 1922, Black build up a typical
>>Stonewall kings attack and crowned it with an intuitive rook sacrifice. For a
>>human it is easy to see the immense practical chances of this sacrifice and it
>>would be the first candidate move to calculate. But Junior5 and the Crafty
>>engine don't find it overnight on my P300.
>>
>>The position after 17.Nd2 was
>>
>>r1b3k1/pp1n3p/2pbpq1r/3p4/2PPp1p1/PP2P1P1/1BQN1P1P/3RRBK1 b - - 0 17
>>
>>17... Rxh2!!
>>
>>Does any program see this?
>>
>>The question is: Do we have a fantastically tough testing position in the league
>>of Nolot here or is it simply incorrect?
>
>I think that it is simply incorrect
>for example white can defend by 21.Qc3(Junior5's move)
>
>Uri

21.Qc3 (protecting e3 to free the rook) Nh5 22.Rg2 Qh4+ 23.Kg1 Ng3 24.Rh2 Qg5
(not Qxh2+ 25.Kxh2 Ne2+ =) 25.Rf2 Nf5 26.Re2 Nh4 27.Bg2 Nf3+ and Black wins.

Jürgen



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