Author: Uri Blass
Date: 01:49:59 06/15/01
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On June 15, 2001 at 02:54:51, Dann Corbit wrote: >On June 15, 2001 at 02:40:05, Jim Monaghan wrote: > >>Well here it is folks. It's definitely not worth trying. I'm only posting it as >>a curiousity. >> >>White to move and mate in 92 moves. Er, that's 183 plies ... :) >> >>[D] 7K/5p1p/3p2p1/B5pr/4n1pb/3N1bk1/4prn1/6RR w - - 0 1 > >Don't just leave us hanging! > >Be1 looks forced for sure. Then what? ... f5? ... d5? >Where can I find the move sequence that leads to inescapable victory? I did not investigate the exact number of moves to mate but I can explain the idea white needs to waste tempos in order to force black to play pawn moves and finally to lose the rook and the game. The idea of a simple traingle does not work because the black knight can play a check move with the knight, free the pieces, and win the game so we need to look for safe squares for the king. We can find that all the black squares are safe for the king. The white squares are not safe for the king except c2 so we need this square in order to lose a tempo. White can find the following idea of wasting a tempo after Be1 by 22 plies Kh8-g7-f8-e7-d8-c7-b6-a5-b4-a3-b2-c2-c1-b2-a3-b4-a5-b6-c7-d8-e7-f8-g7 Black can play all the time Rh6-Rh5 moves but when the king gets into g7 black need to move a pawn in order not to lose the rook playing f7-f6 gives white the g8 square so it does not significantly help black. Black also needs to play d6-d5 in order to prevent Kf7 and after these moves black has 4 pawns moves(f5,f4,d4,h6) so white needs a lot of moves to convince black to play these moves and avoid the Rh6-Rh5 story. Uri
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