Author: Dana Turnmire
Date: 09:59:49 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?
>
>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
There are top programs that can't even play a simple Bishop and Knight ending
against a lone King without using tablebases. Why would one think that a
computer with eight men left could play the ending better than GM Benko known
for years by his endgame finesse? Genius 7 may have accidently fallen into the
correct plan but it seems the correct theme is bringing about zugzwang.
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