Author: Joachim Rang
Date: 11:24:20 03/25/03
Go up one level in this thread
On March 25, 2003 at 09:50:54, Andreas Stabel wrote: >On March 25, 2003 at 09:44:34, Joachim Rang wrote: > >>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. > >After looking at crafty's PV I would say that the point here is that white >won't get into zugzwang because white always has the possibility of >moving Ng1 - Nh3 - Ng1 etc. > >Regards >Andreas yes it seems this fact safes the draw.
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