Author: Dadi Jonsson
Date: 16:27:01 01/08/02
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On January 08, 2002 at 19:16:47, John Merlino wrote: >On January 08, 2002 at 18:50:33, Dadi Jonsson wrote: > >>This is an interesting position from a game that was played by two GMs today: >> >>[D] 8/1p6/1b1qbk1p/p3ppp1/P1P3P1/1P3PNP/4QB2/6K1 b - - >> >>I believe that this is a hard position for programs. How do your programs >>evaluate the position? > >CM8000, on a PIII-600, says: > >Time Depth Score Positions Moves >0:00 1/3 -0.42 6382 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 > 4.Nh5+ Kf7 5.hxg4 >0:00 1/3 -0.48 11779 1...e4 2.Qb2+ Kf7 3.Nxf5 Bxf5 4.gxf5 > exf3 >0:00 1/4 -0.27 28315 1...e4 2.Kh2 Bxf2 3.Qxf2 exf3 4.Qxf3 > >0:00 1/4 -0.80 30342 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 > 4.Ne4+ Ke7 5.hxg4 Qxb3 >0:00 2/5 -0.80 41294 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 > 4.Ne4+ Ke7 5.hxg4 Qxb3 >0:01 2/6 -0.80 66339 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 fxg4 > 4.Ne4+ Ke7 5.hxg4 Qxb3 >0:02 3/7 -1.00 176591 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 Qxb3 > 4.Nh5+ Ke7 5.Qxe5 Qc2+ 6.Kg1 fxg4 > 7.hxg4 Qxa4 >0:06 3/8 -1.00 442921 1...Bxf2+ 2.Kxf2 Qb6+ 3.Kg2 Qxb3 > 4.Nh5+ Ke7 5.Qxe5 Qc2+ 6.Kg1 Qb1+ > 7.Kg2 Qa2+ 8.Kg1 fxg4 9.hxg4 Qxa4 >0:19 4/9 -1.03 1575687 1...Bxf2+ 2.Kxf2 Qb6+ 3.Ke1 fxg4 > 4.fxg4 Qxb3 5.Nh5+ Ke7 6.Qxe5 Qxa4 > 7.Qf6+ Kd6 8.Qxh6 >0:57 5/10 -1.03 4839507 1...Bxf2+ 2.Kxf2 Qb6+ 3.Ke1 fxg4 > 4.fxg4 Qxb3 5.Nh5+ Ke7 6.Qxe5 Qxa4 > 7.Qf6+ Kd6 8.Qd4+ Kc7 >3:15 6/11 -0.94 16846391 1...Bxf2+ 2.Kxf2 Qb6+ 3.Ke1 Qxb3 > 4.Nh5+ Ke7 5.Qxe5 Qb4+ 6.Kf2 Qxa4 > 7.Qg7+ Kd6 8.Qf8+ Kc6 9.Qe8+ Bd7 > 10.Qg6+ Kc5 11.Qxh6 Qxc4 12.Qxg5 > >What is "correct"? > >jm The game went 38... Bxf2+ 39.Kxf2 Qb6+ 40.Kg2 Qxb3 41.Nh5+ Kg6 42.Qxe5 Qc2+ 43.Kg1 Qc1+ 44.Kg2 Qc2+ 1/2-1/2 After the game both players (two strong grandmasters) agreed that that 38... e4! was the correct move, and indeed after seeing the supporting variation it does seem to be a much stronger move than 38... Bxf2 (it would also be interesting to see some computer analysis after that move). If you are interested in the whole story see http://linux.vks.is/skak/hellir-e.shtml
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