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Subject: Re: Test Position = Study by David Przepiorka [Vorwärts, 1910]

Author: George Tsavdaris

Date: 13:38:37 02/05/04

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On February 05, 2004 at 15:52:53, Will Singleton wrote:

>On February 05, 2004 at 15:49:09, George Tsavdaris wrote:
>
>>On February 05, 2004 at 15:07:27, José Antônio Fabiano Mendes wrote:
>>
>>>  Study by David Przepiorka [Vorwärts, 1910]   vorwärts ==> onward/forward/ahead
>>>  [D]R5n1/4n2p/4K2P/2k3P1/1p6/8/8/8 w
>>>  The only winning move is 1. Rb8 then 1...Kc4 2. Rxg8 Nxg8 3. g6 b3 4. gxh7 b2
>>>  5. hxg8=Q b1=Q 6. h7 Qe4+ 7. K moves, discovered check and White wins. Now we
>>>  understand the purpose of 1. Rb8, White King moves with check.
>>>  Source ==> "Ajedrez", Editorial Sopena Argentina, April 1978, page 191
>>
>>Well i think the immediate 1.Rxg8 is winning too (more easily according to
>>computers).
>
>I don't think that wins, as black can queen and get a perpetual (I think).  My
>question is, after Rb8, how does white win after Nxh6?

Can you find an improvement for black in this line:

1.Rxg8 Nxg8 2.g6 hxg6 3.h7 Nh6 4.h8Q Nf5 5.Ke5 b3 6.Qc8+ Kb4 7.Qc1 with a clear
win.

If instead 2...b3 3.gxh7 b2 4.hxg8Q b1Q  and a tablebase mate in 37 for white
with 5.Qc8+



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