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Subject: Re: Positional mistake, which computers avoid it?

Author: José de Jesús García Ruvalcaba

Date: 10:00:20 04/14/00

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On April 13, 2000 at 23:17:06, William Bryant wrote:

>On April 13, 2000 at 18:00:21, José de Jesús García Ruvalcaba wrote:
>
>>r1b2rk1/5pbp/p7/1P1P2q1/2B1pp2/N7/PP2QPPP/R4R1K b - - 1 19
>>
>>	Black played 19... Qxg2+?, winning an exchange but giving up a dangerous and
>>promising attack.
>>	Which programs are able to avoid this mistake?
>>José.
>
>I searched 11 full ply and Screamer never wavered from Qxg2+
>Nodes: 	16245305
>CE:		+1.25
>PV:		Qxg2+ Kxg2 f3+ Kh1

	Kh1 is a mistake. Instead 21. Qxf3 exf3+ 22. Kxf3 Bxb2 23. Rg1+ Kh8 24. Nc2
Bxa1 25. Rxa1 and the white king is already centralized for the endgame, while
the black king is in the corner.

>fxe2 Rg1 Kh8 Rxg7 Kxg7 Bxe2 Rd8 Bc4 Rd6 bxa6 Bxa6
>
>If this isn't the best answer, please post the solution, and I'll try a longer
>and deeper search.
>
>William
>wbryant@ix.netcom.com



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