Author: Paulo Soares
Date: 21:15:05 08/29/99
Go up one level in this thread
On August 29, 1999 at 22:12:29, Howard Exner wrote:
>On August 29, 1999 at 02:02:58, Paulo Soares wrote:
>
>>On August 28, 1999 at 09:31:29, Howard Exner wrote:
>>
>>>On August 27, 1999 at 19:20:49, Paulo Soares wrote:
>>>
>>>>On August 27, 1999 at 13:14:34, Howard Exner wrote:
>>>>
>>>>>On August 27, 1999 at 04:54:05, Howard Exner wrote:
>>>>>
>>>>>>On August 27, 1999 at 00:00:22, Paulo Soares wrote:
>>>>>>
>>>>>>>On August 26, 1999 at 15:26:30, Howard Exner wrote:
>>>>>>>
>>>>>>>>On August 26, 1999 at 05:20:10, Paulo Soares wrote:
>>>>>>>>
>>>>>>>>>1. c5 really wins? I have my doubts with the following variant: 1.c5 bxc5.
>>>>>>>>>I didn't still get to find a line that wins.
>>>>>>>>>
>>>>>>>>>2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - -
>>>>>>>>>
>>>>>>>>>Paulo
>>>>>>>>
>>>>>>>>1. c5 bxc5 2. Be1 Kb8 3. Kc4 Kc8 4. Ba5 Bd4 5. Bd8 Be3 6. Bg5 Kc7 7. Kd3
>>>>>>>>Bc1 8. Bxh4 Bxf4 9. Bd8+ Kc8 10. h4 Be5 11. Ba5 Bg7 12. h5
>>>>>>>>
>>>>>>>>This sequence looks like it should win for white. If there's a better
>>>>>>>>sequence of moves maybe we can continue to work on it.
>>>>>>>
>>>>>>>Good line! I didn't get to find defense for black.
>>>>>>>I am not getting to find a winner endgame for
>>>>>>>white with the line below, in which black plays
>>>>>>>4...Kb8 instead of 4...Bd4.
>>>>>>
>>>>>>This is a tough one. I'll try some lines and report back.
>>>>>>I wonder if the author of this test, Frederic Louguet, has
>>>>>>the solution somewhere? Also I read another reply to your post saying
>>>>>>that the solution is a long one but no lines were given.
>>>>>>
>>>>>>>Paulo
>>>>>>>
>>>>>>>[Round ""?]
>>>>>>>[White ""?]
>>>>>>>[Black ""?]
>>>>>>>[Result " *"]
>>>>>>>[Annotator " Soares,P "]
>>>>>>>[SetUp " 1 "]
>>>>>>>[FEN " 2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - 0 1 "]
>>>>>>>
>>>>>>>1. c5 bxc5 2. Be1 Kb8 3. Kc4 Kc8 4. Ba5 Kb8 5. b6 axb6
>>>>>>>6. Bxb6 Bd4 7. a7+ Kb7 8. Bc7 Kxa7 9. Bxd6 Kb6
>>>>>
>>>>>Here are some lines that look promising:
>>>>>
>>>>>
>>>>>1. c5 bxc5 2. Be1 Kb8 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 6. a7+ Kb7 7. Bc7
>>>>>Kxa7 8. Bxd6 Kb6 9. Be5 Be7 10. Kc4 Bf8 11. Bf6 Bd6 12. Bd8+ Kb7 13. Bxh4
>>>>>Bxf4 14. Kxc5 Kc7 15. Bf2 Bh6 16. h4 Kd7 17. h5 Bg5 18. Be1 Bh6 19. Kd4
>>>>>Bg7+ 20. Kc4 Bh6 21. Bb4 Be3 22. Kd3 Bg5 23. Bd2 f4 24. Ke4 f3 25. Be3
>>>>>Kd6 26. Kxf3 Bf6 27. Ke4 Bg7 28. h6
>>>>>
>>>>>1. c5 bxc5 2. Be1 Kb8 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 6. a7+ Kb7 7. Bc7
>>>>>Be7 8. Bb8 Bf8 9. Kc3 Ka8 10. Kc4 Kb7 11. Kb5 Be7 12. Bc7 Kxa7 13. Kc6
>>>>>Ka6 14. Kd7 Bf8 15. Ke8 Kb7 16. Ba5 Bh6 17. Bd2 c4 18. Kd7 c3 19. Be3 Bf8
>>>>>20. Ke6 Ka6 21. Kxf5 Kb5 22. Ke6 Kc4 23. f5 Kd3 24. Bg5 c2 25. f6
>>>>
>>>>
>>>>I think that your first line it's bad for black, because 7...Kxa7 seemed
>>>>wrong. However I didn't find win for white after 7 ...Be7.
>>>>20 ...c2, seems to be a good move.
>>>>I am analyzing the position whit Hiarcs 7.32 + hashtables(only from
>>>>CD), and you?
>>>
>>>I use Rebel 10 to help me go through games. Your analysis below
>>>has many improvements for black. This got me thinking that maybe
>>>we are pushing the white pawn on a6 too soon. This ending is all
>>>about tempos and white having the better king position as well as better
>>>pawn placement. It looks like there should be a win here. How about these
>>>alternative lines:
>>>
>>>A.1. c5 bxc5 2. Be1 Kb8 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 6. Kc4 Bd4 7. Bd8
>>>Be3 8. Bxh4 Bxf4 9. Bf6 Bg3 10. h4 f4 11. Kd3 f3 12. Ke3 f2 13. Ke2 Ka7
>>>14. h5 Bf4 15. Bg7 Kxa6 16. Kxf2 Kb5 17. Kf3 Bg5 18. h6
>>>
>>>B.1. c5 bxc5 2. Be1 Kb8 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 6. Kc4 Kc8 7. Kb5
>>>Kb8 8. Kc6 Be7 9. Kd7 Bf8 10. Ke6
>>>
>>>By sharing different lines we might come up with a possible solution.
>>>
>>>>
>>>>[Event "?"]
>>>>[Site "?"]
>>>>[Date "????.??.??"]
>>>>[Round "?"]
>>>>[White "Analises"]
>>>>[Black "?"]
>>>>[Result "*"]
>>>>[Annotator "Soares,P"]
>>>>[SetUp "1"]
>>>>[FEN "2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - 0 1"]
>>>>[PlyCount "48"]
>>>>
>>>>1. c5 bxc5 2. Be1 Kb8 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 6. a7+ Kb7 7. Bc7 Be7
>>>>8. Bb8 Bf8 9. Kc3 Ka8 10. Kc4 Kb7 11. Kb5 Be7 12. Bc7 Kxa7 13. Kc6 Ka6 (13...
>>>>c4 {!?}) 14. Kd7 Bf8 15. Ke8 Kb7 16. Ba5 Bh6 17. Bd2 c4 18. Kd7 c3 19. Be3 Bf8
>>>>(19... c2 {!?}) 20. Ke6 Ka6 (20... c2 21. Kxf5 Bg7 22. Bc1 (22. Kg6 Bd4 23. Bc1
>>>>Kb6 24. f5 Kc5 25. f6 Bxf6 26. Kxf6 Kxd5 {=}) (22. Ke6 Bb2 23. Kxd6 c1=Q 24.
>>>>Bxc1 Bxc1 25. f5 Kc8 26. Ke6 Kd8 {=}) 22... Kb6 23. Ke6 Kc5 24. f5 Be5 25. f6
>>>>Bxf6 26. Kxf6 Kxd5 27. Kf5 Kd4 28. Kf4 (28. Kg4 Ke4 29. Kxh4 Kf3 30. Kg5 d5 31.
>>>>h4 d4 32. h5 d3 33. h6 Ke2 {=}) 28... Kd3 29. Kf3 d5 30. Kf2 d4 31. Kf3 Kc3 32.
>>>>Ke4 d3 33. Ke3 Kc4 {=}) 21. Kxf5 Kb5 22. Ke6 Kc4 23. f5 Kd3 24. Bg5 c2 {
>>>>f6[Event "?"]} *
>>
>>
>>Line "B.1" seemed a win for white. I worked hard on line "A.1",
>>but I think it's too good for white.
>>I tried to win a tempo with 14...f1=Q+, and I got to think that black
>>could draw. Illusion.
>>I increased a variant that we didn't have analyzed, 2 ...Bd8, that avoids
>>3. Ba5, but I think that 3.Bc3! win.
>>I was tired and I didn't to find the winner line for white for
>>move (5...Bb2!?), but seemed dificult to find a draw for black.
>>See some lines below.
>>
>>
>>[Event "?"]
>>[Site "?"]
>>[Date "????.??.??"]
>>[Round "?"]
>>[White "?"]
>>[Black "?"]
>>[Result "*"]
>>[Annotator "Soares,P"]
>>[SetUp "1"]
>>[FEN "2k5/p7/Pp1p1b2/1P1P1p2/2P2P1p/3K3P/5B2/8 w - - 0 1"]
>>[PlyCount "35"]
>>
>>1. c5 bxc5 2. Be1 Kb8 (2... Bd8 3. Bc3! Kb8 4. Bg7 Kc8 5. Bh6 Kd7 6. Bg5 Ba5 7.
>>Bxh4 Ke8 8. Bg5 Kf7 9. h4 Bb6 10. h5 Bc7 11. h6 Kg6 12. Kc4 Kh7 13. Be7 Kxh6
>>14. Bxd6 {+-}) 3. Ba5 Kc8 4. b6 axb6 5. Bxb6 Kb8 (5... Bb2 {!?})6. Kc4 Bd4 7.
>>Bd8 Be3 8. Bxh4 Bxf4 9. Bf6 Bg3 10. h4 f4 11. Kd3 f3 12. Ke3 f2 13. Ke2 Ka7 14.
>>h5 Bf4 (14... f1=Q+ 15. Kxf1 Bf4 16. Bg7 Kxa6 17. Ke2 (17. h6 {?} 17... Bxh6
>>18. Bxh6 Kb5 {=}) 17... Kb5 18. Kd3 c4+ 19. Ke4 Bd2 20. h6 c3 21. Kd3 (21. h7 {
>>?!} 21... c2 22. Bb2 Bc3 23. Bxc3 c1=Q 24. h8=Q) 21... Bxh6 22. Bxh6 Kc5 23.
>>Ke4 c2 24. Bd2 Kc4 25. Be3 {+-}) 15. Bg7 Kxa6 16. Kxf2 Kb5 17. Kf3 Bg5 18. h6 *
>
>I went through this and agree that it appears white will win. But these
>types of positions often turn up refutations. My thoughts for now based on our
>analysis (yours, mine and Mark's) is that c5 is a forced win for white.
Although we don't have analyzed more deeply (5 ...Bb2), I agree with you, it
seems that me, you, Mark, Hiarcs7.32, Rebel10 and Crafty reached the conclusion
that c5 seem to be a winner move!
My initial doubt was if c5 could win, now a small doubt: can black draw
after c5?
Paulo
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