Author: Simon Finn
Date: 03:16:23 10/22/01
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On October 21, 2001 at 18:22:26, Jon Dart wrote: >Recently Arasan had this position against Postmodernist: > >[D] 8/6P1/2B2n2/p4P2/P2k4/1pp5/1K6/8 w - - > >White played Kc1 and lost after ... c2 64. Kd2 Kc4 65. Bb5+ Kb4 66. Bd3 Kxa4 >67. Bc4 Ka3 68. Kc1. > >I think White is dead after Kc1 and has to play Kxb3 here. But it seems to be >extraordinarily difficult for a number of programs, including mine, to see that >this is bad. Maybe I'm being stupid, but how does Black win after 67. Bxc2? 67... bxc2 68. Kxc2 67... Ka3 68. Bxb3 Kxb3 69. Kc1 Black can't promote the a-pawn without the assistance of his knight, but how does he free it without losing the a-pawn? (I don't think this is one of those positions where you can let White queen and then give mate with the knight.) Simon > >Even at this point: > >[D] 8/6P1/2B2n2/p4P2/P1k5/1p6/2pK4/8 w - - > >Crafty keeps predicting a draw, with the pv Bb5+ Kb4 Bd3 Ng8 Kc1 Kc5 Bb5 Kd4 Kd2 >Nf6 Bc6. Arasan's score goes - after about ply 12 but it doesn't see disaster. >Hiarcs, however, seems to figure this out pretty fast. > >--Jon
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