Author: Robert Hyatt
Date: 16:54:29 10/06/03
Go up one level in this thread
On October 06, 2003 at 18:42:56, Uri Blass wrote: >On October 06, 2003 at 18:03:06, Robert Hyatt wrote: > >>On October 06, 2003 at 14:51:53, Ricardo Gibert wrote: >> >>>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 -+ >> >>I believe that is a draw, assuming move 3 is Bh3 and not Bh8. >> >>Bxg2 seems good enough there. > >move 3 is Ba6 > >The idea is to put black to a zugzwang so Bh3 that gives black the option Kb7 >does not make sense. > >3.Ba6 does not let the black king to move > >Uri That's what I thought. But with Bh8, I assumed that either h or 8 was correct. Which means Bh3 was a reasonable guess. I didn't consider that the both were wrong. :)
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