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Subject: Re: Position

Author: Vincent Lejeune

Date: 14:38:32 01/30/06

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On January 30, 2006 at 17:09:29, Sune Larsson wrote:

>On January 30, 2006 at 16:47:34, Vincent Lejeune wrote:
>
>>On January 30, 2006 at 16:05:39, Sune Larsson wrote:
>>
>>>On January 30, 2006 at 15:21:01, Vincent Lejeune wrote:
>>>
>>>>On January 30, 2006 at 14:58:47, Sune Larsson wrote:
>>>>
>>>>>
>>>>> 6k1/6p1/p2n4/5P2/2P5/1p6/3r3P/1K2Q3 b - - 0 44
>>>>>
>>>>>
>>>>> What about 44.-Nxc4? Good or bad?
>>>>>
>>>>> /S
>>>>
>>>>It seems to be a fortress but with the 2 white pawns there's possible winning
>>>>combinations, look at the following game :
>>>>
>>>>7k/6p1/p4r2/5P2/4Q3/1K6/7P/8 b - - 0 7
>>>>
>>>>[Event "?"]
>>>>[Site "?"]
>>>>[Date "????.??.??"]
>>>>[Round "?"]
>>>>[White "Nouvelle partie"]
>>>>[Black "?"]
>>>>[Result "*"]
>>>>[SetUp "1"]
>>>>[FEN "6k1/6p1/p2n4/5P2/2P5/1p6/3r3P/1K2Q3 b - - 0 1"]
>>>>[PlyCount "38"]
>>>>
>>>>1... Nxc4 2. Qe6+ Kh8 3. Qc8+ Kh7 4. Qxc4 Rd6 5. Kb2 Rf6 6. Qe4 Kh8 7. Kxb3 Kg8
>>>>8. Kc4 Kh7 9. h4 Kg8 10. Kd4 a5 11. Ke5 Rh6 12. Qg4 Kh7 13. Kf4 a4 14. Kg5 a3
>>>>15. Qa4 Rd6 16. Qxa3 Rc6 17. Qd3 Rf6 18. h5 Kg8 19. Qc4+ Kh7 20. Qe6 *
>>>
>>>
>>> What about keeping the a-pawn on a6 - and if then similar variations like
>>> above - on Qc4+ - Kf8 (instead of Kh7).
>>>
>>> /S
>>
>>With Hiacs 10 and EGTB, after some learning I get mate score here
>>
>>[Event "?"]
>>[Site "?"]
>>[Date "????.??.??"]
>>[Round "?"]
>>[White "Nouvelle partie"]
>>[Black "?"]
>>[Result "*"]
>>[SetUp "1"]
>>[FEN "8/6pk/p4r2/5PKP/8/3Q4/8/8 b - - 0 18"]
>>[PlyCount "3"]
>>
>>18... Kg8 19. Qc4+ Kf8 *
>>
>>
>>
>>5k2/6p1/p4r2/5PKP/2Q5/8/8/8 w - - 0 1
>>
>>Analysis by Hiarcs 10:
>>
>>1. +-  (#39): 20.Df4 Rg8
>>2. +-  (#40): 20.Dc8+ Rf7 21.Db8 Th6 22.Da8 Tf6
>
>
> Very interesting. Could you give the whole mating variation?
>
> /S

Here's the shortest mate i can find :

[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "1-0"]
[SetUp "1"]
[FEN "6k1/6p1/p4r2/5PKP/8/3Q4/8/8 w - - 0 0"]
[PlyCount "55"]

1. Qd5+ Kf8 2. Qe5 Kf7 3. Qd4 Rh6 4. Qd7+ Kg8 5. Qe8+ Kh7 6. Qe6 a5 7. Qd5 a4
8. Qe4 Rf6 9. Qxa4 Rd6 10. Qe4 Kh8 11. Qe8+ Kh7 12. Qg6+ Rxg6+ 13. hxg6+ Kg8
14. Kf4 Kf8 15. Ke4 Ke8 16. Kd5 Ke7 17. Ke5 Kd7 18. f6 gxf6+ 19. Kxf6 Kd6 20.
g7 Kd5 21. g8=Q+ Kd4 22. Qc8 Ke4 23. Qc3 Kd5 24. Qb4 Kc6 25. Ke6 Kc7 26. Qb5
Kc8 27. Kd6 Kd8 28. Qb8# 1-0




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