Author: Robert Hyatt
Date: 17:29:58 12/07/03
Go up one level in this thread
On December 07, 2003 at 10:24:48, Uri Blass wrote:
>On December 06, 2003 at 18:10:23, Dana Turnmire wrote:
>
>>On December 06, 2003 at 18:09:17, Dana Turnmire wrote:
>>
>>>I just bought a copy of Basic Chess Endings revised by GM Benko and decided to
>>>try out a few positions. I had the original version but it had so many mistakes
>>>I never trusted any of the positions due to the possibility it was flawed.
>>>Hopfully GM Benko has made all the corrections and this classic will regain its
>>>prominence. So far neither Crafty, CM9 SKR, or Genius 7 can play this ending
>>>correctly at 1 min/move.
>>>
>>>Whoever plays wins.
>>>
>>>[Event "BCE No. 132"]
>>>[Site "?"]
>>>[Date "2003.??.??"]
>>>[Round "?"]
>>>[White "?"]
>>>[Black "?"]
>>>[Result "1-0"]
>>>[d] 4k3/5ppp/8/8/8/8/PPP5/3K4 w - -
>>>
>>>{The main variation is } 1. Ke2 Kd7 2. Kf3 Kc6 3. a4 h5 4. c4 f5 5. Kg3 Kb6 6.
>>>b4 g5 {or ...g6 7.a5+ Ka6 8.c5 Kb5 9.Kg2 g5 (or 9...h4 10.Kh2! f4 11.Kg1!! g5
>>>12.Kg2 g4 13.Kg1, etc.) 10.Kg3 g4 11.Kf2! f4 12.Kg2 h4 13.Kg1!! f3 14.Kf2 h3
>>>15.Kg3, and now the Black king must move, allowing a White pawn to queen.} 7.
>>>a5+ Ka6 {7...Kb7 8.c5} 8. c5 h4+ 9. Kh3 f4 {or 9...Kb5 10.Kh2, as in the
>>>variation above} 10. c6 f3 11. b5+ Ka7 12. c7 g4+ {or 12...Kb7 13.b6 g4+
>>>14.Kh2 g3+ 15.Kg1 h3 16.a6+ Kc8 17.a7} 13. Kxg4 f2 14. c8=Q f1=Q 15. b6+
>>>{mate} 1-0
>
>Can you give me a proof that white wins with 1.Ke2 and not with 1.a4?
If you want to play it out, yes. Any move other than Ke2 draws, and
another inexact move can actually lose for white after a4.
>
>A game is not a proof because it is possible that the sides did not play
>correctly and we need clear rules what to do in every position that can happen.
>
>I never tried to analyze the position but it seems that we need some rules what
>to do in some classes of positions in order to prove something.
>
>Uri
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