Author: Robert Hyatt
Date: 11:20:31 11/25/02
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On November 25, 2002 at 10:27:39, Terry McCracken wrote: >On November 25, 2002 at 00:38:20, Robert Hyatt wrote: > >>On November 24, 2002 at 23:56:30, Terry McCracken wrote: >> >>>[D]8/4p3/4Q3/8/8/k1p3PP/1q3P1K/8 w - - 0 1 >>> >>>This is reposted as it was given little attention. >>> >>> >>>http://www.talkchess.com/forums/1/message.html?266990 >> >> >>I ran this position myself and reported. Does Qxe7 lose? I couldn't see >>how black could avoid the checks, unless white is supposed to win rather than >>draw this... > > >Yes it loses Bob, slowly Black avoids all checks and Queens his pawn. > >Tiger sees it and so do other programmes given time or a little human help:o) > >It's technique which I'm getting a little rusty on, otherwise I'd have examined >the posistion more closely the first time. > >Terry > >1.Qxe7+?? Ka2!! 2.Qe6+ Kb1! 3.Qe4+ c2! and it's only a matter of time... That was my analysis, but I don't see how white can stop (1) black pins the pawn (c2) on the king at b1 along the diagonal; (2) black checks the king from behind if on a2/a1/b1.. And obviously going to c1 doesn't help... I could (myself, a human) see ways to prevent the pin but not the checks, or preventing the checks but not the pin. Black has to force a position where the only check is on the a1-h1 rank, so that c1=Q interposes, but I couldn't find a way to make this happen, in my admittedly fairly quick analysis...
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