Author: Peter McKenzie
Date: 12:16:17 10/07/00
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The position where the solution is most in doubt: [D]2k2K2/8/pp6/2p5/2P5/PP6/8/8 w - - The authors say that after 1.Ke8 Kc7 2.Ke7, black draws by 2...b5 with a stalemate motif after 3.Ke6 b4 4.a4 Kb6. Of course white can vary, and they quote: 4.axb4 cxb4 5.Kd5 a5 6.Kc5 a4= Or: 2.a4 b5 which is supposed to be drawn too. I haven't checked these lines thoroughly, but quickly playing some of them vs my program suggests they are probably correct. Certainly its possible there is a mistake though. The other controversial positon: [D]8/1k6/p4p2/2p2P2/p1P2P2/2P5/P1K5/8 w - - Kc1 is analysed using the 'theory of corresponding squares', something I don't really understand :-) I haven't analysed this one at all, I will just quote the main variation: 1.Kc1! Kc7 2.Kd1! Kd7 3.Ke1 Kc7 4.Kf2 Kd8 5.Ke2 Ke8 6.Kd3 Kd7 7.Ke3 Kd6 8.Ke4 "(forcing the pawn to advance)" a3 9.Kd3 a5 10.Kc2! a4 "The posiiton on the Q-side is blocked; a quadratic system with non-ambiguous rear (711) now operates." Go figure! 11.Kc2! Ke7 12.Kd3 Kc6 13.Ke2 Kd6 14.Kf2 Kd7 15.Ke3 Ke7 16.Kf3 and wins I didn't play thru. that variation, but clearly its at least 31ply and white hasn't even captured a pawn yet! Let me see, finished with white K on f3, so it needs another 3 moves at the very least to capture c5 so this problem looks like it is at the VERY least 34ply deep and probably more. cheers, Peter
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