Author: Uri Blass
Date: 06:22:00 07/18/02
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On July 18, 2002 at 08:40:44, Michael Diosi wrote: >Hi there, > >if i remember right this the position Botwinik used to poit out the performance >of his program Pionier. If so then this is not a draw but a win for white. I >don't have the moves now, but i can look it up, or maybe someone else can do >this. > >Michael You remember correctly and the right line is Ba3 Qxa3 Nh5+ Ba3 is easy to find because of the draw and the real test position is to find Nh5+ in the following position: [D]8/p5kp/1p2Pnp1/3pQ3/2pP4/qnP3N1/6PP/6K1 w - - 0 2 It is not very hard to fail high on Nh5+ but solving the fail high seems to be a very hard problem for movei on p800(16 mbytes hash tables) and it's branching factor is not good. 10 0 1402 2362675 e5c7 g7h8 c7b8 h8g7 b8c7 10 1 7747 12767894 g3h5 10 374 75967 121755051 g3h5 g6h5 e5g5 g7f8 g5f6 f8g8 e6e7 a3c1 g1f2 c1c2 f2g3 c2d3 g3h4 d3e4 h4h5 e4e2 h5h4 e2e1 h4h3 e1c3 h3g4 c3d4 f6d4 b3d4 e7e8q g8g7 10 374 76287 122304866 g3h5 g6h5 e5g5 g7f8 g5f6 f8g8 e6e7 a3c1 g1f2 c1c2 f2g3 c2d3 g3h4 d3e4 h4h5 e4e2 h5h4 e2e1 h4h3 e1c3 h3g4 c3d4 f6d4 b3d4 e7e8q g8g7 Uri
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