Author: Joachim Rang
Date: 01:05:47 06/23/04
Go up one level in this thread
On June 22, 2004 at 09:46:36, Dieter Buerssner wrote:
>On June 20, 2004 at 17:17:37, Vincent Lejeune wrote:
>
>>On June 19, 2004 at 19:09:05, Dieter Buerssner wrote:
>>
>>>On June 18, 2004 at 07:17:04, Joachim Rang wrote:
>>>
>>>>Hi,
>>>>
>>>>Dr John nunn created a Testset containing 10 endgame positions on the boarder
>>>>between draw ans won for one side:
>>>>
>>>>http://www.geocities.com/CapeCanaveral/Launchpad/2640/pgn/tests/NET.zip
>>>>
>>>>The position Nr. 8 is this:
>>>>
>>>>[D]8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - - 0 1
>>>>
>>>>Winning:
>>>>
>>>>1.Bf6-g7 Ke4-d3 2.Bg7-e5 f4-f3 3.Be5-g3 Bd5-c6 4.Kf2-f1 Kd3-c3 5.Bg3-e1+ Kc3-b2
>>>>6.Kf1-f2 Kb2xa3 7.Be1-d2 a6-a5 8.b4xa5 b5-b4 9.Kf2-e3 b4-b3 10.Bd2-c3 b3-b2
>>>>11.Bc3xb2+ Ka3xb2 12.Ke3-d2 Kb2-b3 13.Kd2-d3 Kb3-b4 14.a5-a6 Kb4xc5 15.a6-a7
>>>>Bc6-a8 16.Kd3-e3 Kc5-c4
>>>
>>>How do you continue after 5.Bc7 instead of 5. Be1+? (Idea, witch B on c7, a6-a5
>>>will not be possible).
>
>>If the white bishop want to avoid a5, the black king go to f5 to force the white
>>bishop to protect the g5 pawn and then push a5!
>
>Thanks Vincent. I got it know. Actually I get +5 score now after 3. Bg3. But now
>Yace suggests 3. c6. I don't find a win here for black. Can you suggest a line?
>I tried grabbing the a-pawn, then going with black K to f5, then pushing a5.
>Black will capture on a5 with the bishop, and give the g-pawn for free.
>
>[D] 3B4/8/p5p1/1p1b1kP1/1P6/4Kp2/8/8 b - -
>
>a5 Bxa5.
>
>And from here, I cannot find progress. Of course one can push the g-pawn a bit,
>But I didn't find more. Can you, or anybody else show a line?
>
>Regards,
>Dieter
Hi Dieter,
If black allows c6 in the first moves the game will be drawn. This is due to the
fact that if white can get rid of his own pawn on c6 his bishop can cover more
important files, ie from e7 to e4 to prevent the advance of the (to be created)
black b-pawn-passer, or from d4 protect his own passer on a7 and defend the two
squares in front of the two black passers on b3 and f3 which might be reached.
See this post:
http://talkchess.com/forums/1/message.html?371304
Below are my lines which I produced while analyzing this, some lines are
commented others not. Maybe it will help you to find your own conclusion:
[Event "Blitz:2'+1"]
[Site "Förderkreis Iwanuschka e.V."]
[Date "2004.06.18"]
[Round "?"]
[White "New game"]
[Black "?"]
[Result "*"]
[Annotator "Rang,Joachim"]
[SetUp "1"]
[FEN "8/8/p4Bp1/1pPb2P1/1P2kp2/P7/5K2/8 w - - 0 1"]
[PlyCount "64"]
[EventDate "2004.??.??"]
[TimeControl "120+1"]
1. c6 $1 {the only move to draw! 0} (1. Bg7 Kd3 2. Be5 f3 3. Bc7 Kc3 4. Ke3 Kb3
5. Ba5 Kxa3 6. Kd3 Kb3 7. Ke3 Kc4 8. Kf2 Kd4 9. Bc7 Ke4 10. Ba5 Kf5 11. Bd8 (
11. Ke3 Kxg5 12. Kf2 Kf4 13. Bc7+ Ke4 14. Bd8 Kd3 15. Bc7 g5 16. Bd8 g4 17. c6
Bxc6 18. Bb6 Kc4 19. Ba5 Kc3 $19) 11... Kf4 12. Be7 (12. Bb6 Kxg5 13. Ke3 Kf5
14. Bc7 Kg4 15. Bd6 Kh3 16. Kf2 g5 17. Be5 g4 $19) 12... a5 13. bxa5 (13. c6 a4
14. c7 Bb7 15. Bc5 a3 16. Bd4 (16. Be3+ Ke4) 16... Ke4 17. Ba1 Kd3 18. Be5 Kc2
19. c8=Q+ Bxc8 20. Kxf3 Kb1 21. Ke4 a2 22. Kd5 a1=Q 23. Bxa1 Kxa1 24. Kc5 Kb2
25. Kxb5 Kb3 26. Kc5 Ka4 27. Kc4 Bd7 28. Kc5 $19) 13... Bc6 14. Bd8 Ke4 15. Bf6
b4 16. a6 Kd3 17. Bb2 Kc2 18. Bg7 b3 19. Ke3 b2 20. Bxb2 Kxb2 $19) (1. Bd8 Bc6
2. Bc7 f3 3. Bd6 Kd3 4. Ke1 Kc3 5. Bc7 Kb3 6. Ba5 Kxa3 7. Kd2 Kb3 8. Ke1 Kc3 9.
Kf2 Kd4 10. Bb6 Ke4 11. Bc7 Kf5 12. Bd8 Kf4 $19) 1... Bxc6 2. Ke2 Bd7 3. Be7 (
3. Kd2 Bg4 4. Bd8 Kd4 5. Bc7 f3 6. Bb6+ Kc4 7. Ke3 (7. Ke3 Kb3 8. Bd4 Kxa3 9.
Bc5 Ka4 10. Kf2 a5 11. bxa5 Kxa5 $19) (7. Kc2 Bf5+ 8. Kd2 Kb3 9. Bc5 Kxa3 10.
Kc3 Ka4 $19) 7... Kb3 8. Kf4 Bh5 9. Ke4 Kxa3 $19) 3... f3+ 4. Kf2 Bc6 5. Bc5
Kd3 6. Bb6 (6. Be7 Kc3 7. Bd6 Kb3 8. Be7 Kxa3 9. Bd6 Ka4 10. Be7 a5 11. bxa5 b4
$19) 6... Kc3 7. Ba5 Kb3 8. Kg3 Bb7 9. Kf2 Kxa3 10. Kg3 Kb3 11. Kf2 Kc3 12. Kg3
Kd4 13. Bb6+ Ke4 14. Kf2 Kf5 15. Bd8 Kf4 16. Be7 a5 17. bxa5 Ke4 18. Bb4 Kd4
19. a6 Bc6 20. Ke1 Kc4 21. Be7 b4 (21... Kc3 22. Bf6+ Kb3 23. Be7 b4 24. Kd2
Be4 25. Bd6 Kc4 26. Bg3 b3 27. Be5 $11) 22. Kd2 b3 23. Bf6 f2 (23... Kb4 24.
Bb2 Bd5 25. Ke3 Kb5 26. a7 Kb6 27. Bd4+ Kb7 28. Kd2 $11 Kc7 29. Kc3 (29. Ke3 $2
Kd7 30. Be5 Ke6 31. Bf6 Kf5 $19) 29... Kd6 30. a8=Q Bxa8 31. Kxb3 Kd5 32. Kc3
Ke4 33. Bb6 Kf4 34. Kd2 Kxg5 35. Ke3 Kg4 36. Kf2 g5 37. Be3 $11) 24. Ke2 f1=Q+
25. Kxf1 Kd3 26. Kf2 Kc2 27. Kg3 b2 28. Bxb2 Kxb2 29. Kf4 Kc3 30. Ke5 Kd3 31.
Kf6 Be4 32. a7 Kd4 $11 *
regards Joachim
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