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MatPlus.Net Forum General Shumov study
 
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(1) Posted by Geoff Foster [Monday, Feb 8, 2010 21:53]

Shumov study


I used the following study in a solving competition.

I S Shumov, La Strategie, 1870
(= 4+5 )
Win

WinChloe just gives 1.Ba5 as the solution. A possible continuation is 1...bxa5 2.b6 Kg2 3.b7 f3 4.b8=Q f2 5.Qg8+ Kf3 6.Qg6 f1=Q 7.Qxf6+ Ke2 8.Qxf1+ Kxf1 9.Kxe5 Ke2 10.Kd4 Kd2 11.Kc4 wins. However, 1.Kf5 also seems to win e.g. 1...Ke2 2.Bxf4 exf4 3.Kxf4 Kd3 4.Kf5 Kd4 5.Kxf6 Kxe4 6.Ke6 wins.

Maybe the white king should be on d6? Can anyone confirm that the position is correct?
 
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(2) Posted by Siegfried Hornecker [Monday, Feb 8, 2010 22:00]

hhdbiii also gives the study like this. My PC confirms your second solution.
 
 
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(3) Posted by Geoff Foster [Tuesday, Feb 9, 2010 21:24]

Thanks for this Siegfried. What does your computer say if the white king is on d6?
 
   
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(4) Posted by Siegfried Hornecker [Tuesday, Feb 9, 2010 23:43]

1.Ba5 wins, but also the following line:

1.Be1 Kxe4 2.Kc6 Kf5! 3.Bf2!! e4 4.Bxb6 e3 5.Kd5 Kg4 6.Ke4 f5+ 7.Kd3, or 2...Kd3 3.Kxb6 e4 4.Kc5 e3 5.b6 f3 6.b7 f2 7.Bxf2 exf2 8.b8Q f1Q 9.Qb5+ (this, however, would make an own study), or in view of this 2...Kd4! 3.Bf2+! Kd3 4.Bxb6! e4 5.Bc5! ending the same way as before.

However, also 2.Bf2 would work.
 
 
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MatPlus.Net Forum General Shumov study