Author: Dieter Buerssner
Date: 16:09:05 06/19/04
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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 > >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 How do you continue after 5.Bc7 instead of 5. Be1+? (Idea, witch B on c7, a6-a5 will not be possible). Regards, Dieter
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