Author: Simon Finn
Date: 08:03:24 10/04/01
Go up one level in this thread
On October 04, 2001 at 11:01:15, Simon Finn wrote: >On October 04, 2001 at 09:59:03, Simon Finn wrote: > >>On October 04, 2001 at 02:16:42, Ed Schröder wrote: >> >>>On October 03, 2001 at 19:49:56, Slater Wold wrote: >>> >>>>On October 03, 2001 at 15:45:32, José Antônio Fabiano Mendes wrote: >>>> >>>>> Taimanov-Zakharov,USSR 1969 === Black to move and win >>>>> [D]8/5p2/7p/5pk1/8/5KPP/8/8 b >>>>> Source: http://chesscafe.com/text/secpawnendings.txt >>>> >> >>[snip] >> >>>I also get 1..h5 with a +2.4 score so I really wonder if 1..Kf6 is the >>>move to win. >> >>1...h5! is definitely best. >> >>Karsten & Mueller's 1...Kg6 2. Ke3 Kg7 is less convincing, since >> >>3. Kf3! h5 (3... Kh7 4. Kf4 Kg6 5. Ke3 etc) 4. Ke3 Kh6 5. Kf3 Kg5 6 h4+ >> >>is just a long-winded way to reach the main line after 1...h5! >> >>Instead, after 1...Kf6 2. Kf4 Ke6 3. Ke3 Ke5 4. Kf3 >> >>[D]8/5p2/7p/4kp2/8/5KPP/8/8 b >> >>we get an even harder (6 ply deeper) test position. >> >>Black can win only by retracing his steps: >> >>4...Kf6 5. Kf4 Kg6 6. Ke3 Kg5 7. Kf3 h5! etc >> >>because >> >>4...f6? 5. g4 = >> >>4...f4? 5. gxf4+ Kd5 (5...Kf5 6. Ke3) 6. Kg4 Ke4 7. Kh5 Kxf4 8. Kxh6 = >> >>4...h5 5. Ke3 f4+? (5...Kf6! 6. Kf4 Kg6 7. Kf3 Kg5 -+) 6. gxf4+ Kd5 7. Kd3! f6 >>8. Ke3 f5 (8...Kc4 9. Ke4) 9. Kd3 h4 10. Ke3 Kc4 11. Kf3 Kd4 12. Kf2 Ke4 13. Ke2 >>Kxf4 14. Kf2 Ke4 15. Ke2 f4 16. Kf2 f3 17. Kf1 Ke3 18. Ke1 Kf4 19. Kf2 = > >Whoops! 17... Kf5 18. Ke1 Ke5 19. Kf1 Kf4 -+ I meant 19... Ke4 -+. Not my day for accuracy! Simon > >> >>That's why 1...h5 is best - Black can't win unless he forces White to advance >>his h-pawn. >> >>> >>>Ed >>> >>[snip] >> >>>00:04:21 31.00 2.36 1..h5 2.h4+ Kg6 3.Ke3 Kg7 4.Kf3 >>> f6 5.Kf4 Kg6 6.Ke3 Kf7 7.Kf3 Kg7 >>> 8.Kf4 Kg6 9.Ke3 Kf7 10.Kf3 (203) >> >>The score is convincing but the PV isn't. What causes the repetition? >> >>Simon
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