Author: John Merlino
Date: 18:46:00 04/24/05
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On April 24, 2005 at 21:07:45, pavel wrote: >[D]1b6/4P3/1P2PN2/8/8/P1k5/P1p2P2/K5B1 w > >http://www.edcollins.com/chess/under-promote.htm > >Any program find the checkmate? > >pavs Checkmate is a VERY long way away from the initial position -- maybe as many as 30 moves. That's a bit too far for an engine to see. However, there MIGHT be an error in this puzzle. The answer that is given is: [Event ""] [Site ""] [Date "2005.4.24"] [Round ""] [White "Merlin"] [Black "Merlin"] [TimeControl "-"] [Result "*"] [Setup "1"] [FEN "1b6/4P3/1P2PN2/8/8/P1k5/P1p2P2/K5B1 w - - 0 1"] 1.Ne4+ Kd3 2.Nc5+ Kc3 3.Nb3 Be5 4.f4 Bf6 5.e8=N Bh8 6.f5 Be5 7.Bh2 Bxh2 8.b7 Be5 9.b8=B Bxb8 10.Nc7 Bxc7 11.e7 Be5 12.e8=R Bf6 13.Re6 Bg7 14.f6 and White wins. But it seems that 8...Kd3 9.Nc1+ Kd2 10.Kb2 Be5+ 11.Kb3 Kxc1 12.Nc7 Bxc7 13.e7 Kd2 14.e8=Q c1=Q might hold for Black. Here's the position after my line: [D]4Q3/1Pb5/8/5P2/8/PK6/P2k4/2q5 w - - 0 15 It would take a lot of analysis, much more than I'm willing to commit to it. :-) jm
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