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Subject: Re: Endgame position from game; can Black draw?

Author: Oliver Roese

Date: 10:16:01 06/09/01

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Hi!

On June 09, 2001 at 09:00:28, Rafael Andrist wrote:

>In a game (20 sec/move) between "Der Bringer" and my program occured this
>endgame position. My program - playing as Black - sees only a small advantage
>for White, but it looses. Is it possible to draw the endgame or was the game
>already lost before?
>
>[D]6k1/pB2pp1p/6p1/8/4P3/5K2/r5PP/3R4 b - - 1 30
>

White has two pawns for a bishop. Under normal circumstances this is an
win for the stronger side.
In this position black sets its hope on the outside passer. If white would have
a knight, his advantage would be reduced but actually with his bishop he has
little problems to stop this pawn and attack at the same time.
An easy win for white in a game between strong players.
His general plan is to force the exchange of the rooks with threats, then enter
blacks position by creating zugwang posiions.

Oliver


>the game continued:
>30. ... Kg7 31. e5 Ra5 32. Ke4 e6 33. Rd7 Ra4+ 34. Ke3 Ra3+ 35. Kf4 h6 36. Bc6
>g5+ 37. Ke4 Rc3 38. Ba8 a5 39. Ra7 Ra3 40. Bc6 Ra2 41. Be8 Re2+ 42. Kd4 Rd2+ 43.
>Ke3 Rxg2 44. Bxf7 Rxh2 45. Bxe6+ Kg6 46. Rxa5 Rh1 47. Ke2 Kh5 48. Bf5 Rh2+ 49.
>Ke3 Rh1 50. e6 Kh4 51. e7 Re1+ 52. Kf3 Rxe7 53. Ra4+ Kh5 54. Ra1 g4+ 55. Kf4 Re3
>56. Rh1+ Rh3 57. Bxg4+ Kg6 58. Rxh3 Kg7 59. Bf5 Kf6 60. Rxh6+ Kg7 61. Kg5 Kf7
>62. Re6 Kf8 63. Kg6 Kg8 64. Re8# 1-0
>
>Maybe it is easier for humans than for computers to judge this position
>correctly, but I am a too weak player to do that.
>
>Rafael B. Andrist





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