Author: Andreas Stabel
Date: 06:27:12 03/25/03
Go up one level in this thread
On March 25, 2003 at 08:20:10, Joachim Rang wrote:
>Alexander Kure posted a position from a game he played:
>
>[d]8/p3b3/1k6/4p2p/K1Pp2pP/3P2P1/3N4/8 b - - 0 1
>
>He played Bxh4 and gave the following winning line:
>
>1...Bxh4 2. gxh4 g3 3. Nf3 g2 4. Kb4 a5 5. Kb3 Kc5 6. Ng1 e4 7. dxe4 a4
>and the 3 black passers are too much for white to handle.
>
>however 1...Bxh4 2. gxh4 g3 3. c5 is an intersting try.
>
>Kure wrote: 3. c5 Kc6 4. Kb4 g2 5. Nf3 Kc7! and white is in a kind of zugzwang
>position, e.g. 6. Kc4 a5 7. Kb3 Kb7! is winning for black.
>
>but I doubt that. A possible continuation is
>8.Nf3-g1 Kb7-c6 9.Kb3-c4 a5-a4 10.Kc4-b4 e5-e4 11.Kb4xa4 e4xd3 12.Ka4-b3 Kc6xc5
>13.Kb3-b2 and draw...
>
>Vincent of course already proved it, that it is winning for black, but won't
>probably tell us, since we poor guys can only look at a programs output and have
>no understanding of chess :-( So I fear we have to prove it ourselve.
>
>What are xour opinions? Note: There are zugzwang motives, so don't simply look
>on the evaluation, but play the lines further to see what happens.
After 1... Bxh4 2. gxh4 g3 crafty has the following analysis: (4-man EGTBs)
20-> 6:44 -2.56 3. c5+ Kb7 4. Kb4 g2 5. Nf3 a5+ 6.
Kb3 Kc7 7. c6 Kd6 8. Kc4 a4 9. Kb5
e4 10. dxe4 d3 11. e5+ Kc7 12. e6 d2
13. e7 d1=Q 14. e8=Q Qb3+ 15. Kc5 Qxf3
Regards
Andreas
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