Author: Uri Blass
Date: 01:07:08 12/28/02
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On December 28, 2002 at 01:06:11, Dieter Buerssner wrote: >On December 27, 2002 at 17:48:52, David Rasmussen wrote: > >>b2r2kr/p1pqb1p1/1p5p/4p3/2P1N1P1/1P2Q3/P3P2P/4KRR1 b - - 0 1 >> >>Is this a forced mate? Well, of course it is, it's at least a forced mate in 500 >>I should think, but is there a forced mate that a program can find in any >>reasonable time (< a week) or that a human with the aid of a computer could >>find? > >Not that it is too interesting. It is a mate in 18 or shorter. > > 12.01 0:00 +M18 1...Bh4+ 2.Rg3 Qd1+ 3.Kf2 Rf8+ 4.Qf3 Qd4+ 5.Ke1 Bxg3+ >6.Nxg3 Bxf3 7.exf3 e4 8.Nxe4 Qe3+ 9.Kd1 Rd8+ 10.Kc2 Qe2+ 11.Kc1 Qxf1+ 12.Kb2 >Qxf3 13.g5 > >I found this out by just follwing suggested lines with Yace in analyze mode >until mate was seen, and going backward. When white tried a different >alternative, I did the same with this. > >Regards, >Dieter How much time did you give yace to analyze every move for black and for white when you did it? 5...Rxf3 instead 5...Bxg3+ is mate in at most 11 based on my post so I guess shorter mate. My guess is mate in at most 15(maybe even 14) I did not prove mate in 11 after 5.Kg2 but it seems to my eye that 5.Kg2 is even worse than 5.Ke1. Uri
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