Author: Dann Corbit
Date: 20:40:54 07/18/02
Go up one level in this thread
On July 18, 2002 at 09:22:00, Uri Blass wrote: >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 Chess Tiger: 8/p5kp/1p2Pnp1/3pQ3/2pP4/qnP3N1/6PP/6K1 w - - ce 616; acd 13; acs 1; pv Nh5+ gxh5 Qg5+ Kf8 Qxf6+ Kg8 Qf7+ Kh8 g3 Nxd4 e7 Qc1+ Kg2 Qc2+ Kh3 Qf5+ Qxf5;|Ng3h5
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