Author: Joachim Rang
Date: 06:44:34 03/25/03
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On March 25, 2003 at 09:27:12, Andreas Stabel wrote: >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 Play it on, with other moves for white. 4. Kb4 is loosing. 4.Nf3 and after g2 5.Ng1 holds. Craftys evaluation isn't trustable. Play 4. Nf3 g2 and 5. Ng1 and then go further until move 10 or 12 and you will see, that its evaluation drops suddently to 0.00.
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