Author: John Merlino
Date: 14:11:54 02/05/04
Go up one level in this thread
On February 05, 2004 at 16:52:25, Darren Rushton wrote: >On February 05, 2004 at 16:38:37, George Tsavdaris wrote: > >>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+ > >Disagree; after 2.g6 hxg6?? loses immediately, black plays Ne7 instead. >Strongest is: >1.g6 Nxg6 2.Rc8+ Kd4 3.Rxg8 Ne5 4.Rg7 Ke4 5.Rb7 Nd3 After 1.Rxg8 Nxg8 2.g6 Ne7 3.Kxe7 and White wins. Any 3rd move by Black (except 3...hxg6, of course) is followed by 4.hxg7 and a tablebase win. 3...hxg6 is also a tablebase win. Also, I can't find a clear win for White after 1.Rb8 Nxh6! 2.gxh6 (or 2.Kxe7 Nf5+) Nc6. jm
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