Author: Ricardo Gibert
Date: 11:51:53 10/06/03
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On October 06, 2003 at 14:25:09, Robert Hyatt wrote: >On October 06, 2003 at 13:13:15, Leen Ammeraal wrote: > >>The testsuite mes400.epd contains the line >> >>[D]1k6/2p5/B7/4Np2/8/8/6p1/6Kb w - - bm Nc6+; id "MES.0372"; >> >>indicating that only Nc6+ is the best move. >>I don't understand this. >>I suppose the result is a draw. Am I right? >>If so, is Bd3 not just as good? >>Or can Black win in that case? If so, how? >> >>Leen > > >After Nc6 where does black go? And once he goes there, what >happens next? think zugzwang and you'll see the answer. > >IE once the black king goes to a8, white doesn't move the bishop or >pawn. Black can only push the f-pawn. White king goes between g1 >and f2. Wrong. 1.Nc6+ Ka8 2.Kf2? g1=Q+ 3.Kxg1 Bxc6. White cannot move Kf2 until Pf3 gets played. Eventually black has to play g1=Q, white takes the queen >with the king and now black can only move the bishop between h1 and >g2, unless he chooses to give up the f-pawn also. Once that happens, >it is a simple drawn KBN vs KBP and white can force the trade of the >pawn for a piece if he wants. It ends up a draw. Wrong again. 1.Nc6 Ka8 2.Bc8 f4 3.Bh8 f3 4.Kf2 g1=Q+ 5.Kxg1 Bg2 6.Kh2 -+
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