Author: Joachim Rang
Date: 04:17:04 06/18/04
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 Included is the following text: A fantastic position. An opposite-coloured bishop position with equal pawns looks as if it should be a draw, and indeed the players agreed to a draw at this point. However, White a serious problems because of his weak a3-pawn, which cannot be permanently defended by his bishop. Once this pawn has been captured, Black has the chance to make a second passed pawn by playing ...a5, which will stretch White's defence to the utmost. Dvoretsky and Yusupov subjected this ending to detailed analysis, and came to the astonishing conclusion that it is a draw, but only if White starts with the incredible 1 c6!!. It is hard to imagine that any machine would find such a move, but who knows what might happen in the future... Anyone analyzed this yet? some lines I can provide: 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 Drawing (?): 1.c6 Bxc6 2.Ke2 f3+ 3.Kd2 Kf4 4.Bd4 Kxg5 5.Ke3 Kf5 6.Bc5 g5 7.Bd6 g4 8.Bg3 Bd5 9.Kd4 Bb7 10.Ke3 Kf6 11.Kf4 Bc8 12.Bh4+ Kf7 13.Bf2 Ke7 14.Ke5 Kd8 15.Kd6 Bf5 16.Ke5 Bd7 17.Kd6 Thank you in advance for any analysis. regards Joachim
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