Author: Sune Larsson
Date: 02:56:51 06/24/01
Go up one level in this thread
On June 24, 2001 at 05:17:19, Uri Blass wrote: >On June 24, 2001 at 03:40:46, Sune Larsson wrote: > >> >> [D]8/6kP/8/3b1PK1/8/6N1/8/8 w - - 0 1 >> >> In this position white wins with 1.Nh5+. If black takes >> the h7-pawn then the black bishop goes to heaven. >> >> When trying this position with Gambit Tiger, I got some >> strange output. In analyse mode it likes 1.h8B with a draw. >> Very puzzling indeed. >> >> >>Analyse by Gambit Tiger 2.0 >> >>00:00:00.3 2,98 12 96204 Nh5+ Kh8 Nf6 Bb3 Kf4 Kg7 Kg4 Bc4 Kg5 Bf7 Kh4 Bc4 >>00:00:00.0 3,08 12 110478 Nh5+ Kh8 Nf6 Bb3 Kf4 Kg7 Ke5 Bc2 Ke6 Bd1 Kd6 Bb3 Kc7 >>00:00:01.2 2,18 13 359519 Nh5+ >>00:00:02.1 1,56 14 620558 Nh5+ Kh8 Nf6 Bb3 Ng8 Kxh7 Ne7 Kg7 f6+ Kf8 Nf5 Be6 Nd4 >>Bg8 Kf5 Ke8 >>00:00:04.6 1,69 14 1174926 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nc3 Kg6 Ne2 >>Kf5 Nd4+ Ke5 Nc2 >>00:00:04.8 1,69 15 1388715 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nc3 Kg6 Ne2 >>Kf5 Nd4+ Kg6 Nc6 Kf5 >>00:00:06.5 1,69 16 1885192 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nc3 Kg6 Ne2 >>Kf5 Nd4+ Kg6 Nc6 Kf5 Nd8 >>00:00:09.4 1,71 17 2770718 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nc3 Kg6 Nd1 >>Kf5 Ne3+ Kf4 Kf8 Be6 Nc2 >>00:00:13.9 1,71 18 4108035 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nc3 Kg6 Nd1 >>Kf5 Ne3+ Kg5 Nc2 Kf5 Nd4+ >>00:00:20.5 1,73 19 6698978 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nd6+ Kg6 >>Nb5 Kf5 Nd4+ Kg6 Ne6 Kf5 Nc5 >>00:00:34.9 1,73 20 11655854 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nd6+ Kg6 >>Nb5 Kf5 Nd4+ Kg6 Nc6 Kf5 Nb8 >>00:01:44.2 1,73 21 36549655 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nd6+ Kg6 >>Nb5 Kf5 Nd4+ Kg6 Nc6 Kf5 Nd8 >>00:03:03.0 1,73 22 63301063 h8B+ Kxh8 Kf6 Bg8 Ke7 Kg7 f6+ Kg6 Ne4 Kf5 Nd6+ Kg6 >>Nb5 Kf5 Nd4+ Kg6 Nc6 Kf5 Nd8 >> >>Sune > >I suspect that you did not use the KNP vs KB tablebases otherwise tiger could >see that h8B+ Kxh8 is a draw. > >Uri That's correct. But still something is funny. This is the output for Deep Fritz Without the KNP vs KB. Compare it with Tiger's. 8/6kP/8/3b1PK1/8/6N1/8/8 w - - 0 1 Analysis by Deep Fritz: 1.h8Q+ +- (1.44) Depth: 1/3 00:00:00 1.h8Q+ +- (1.44) Depth: 1/3 00:00:00 1.f6+ +- (1.59) Depth: 1/3 00:00:00 1.Nh5+ +- (2.00) Depth: 1/5 00:00:00 1.Nh5+ Kh8 +- (3.03) Depth: 1/6 00:00:00 1.Nh5+ +- (3.34) Depth: 2/6 00:00:00 1.Nh5+ Kh8 2.Nf6 Bf3 +- (3.50) Depth: 3/7 00:00:00 1.Nh5+ Kh8 2.Nf6 Bf7 3.Kh6 +- (3.66) Depth: 4/9 00:00:00 1.Nh5+ Kh8 2.Nf6 Bf7 3.Kh6 Bc4 +- (3.72) Depth: 5/11 00:00:00 1.Nh5+ Kh8 2.Nf6 Bf7 3.Kh6 Bc4 4.Kg6 +- (3.75) Depth: 6/11 00:00:00 1kN 1.Nh5+! +- (4.06) Depth: 7/12 00:00:00 3kN 1.Nh5+! Kxh7 2.Nf6+ Kg7 3.Nxd5 Kg8 4.f6 Kf7 +- (4.91) Depth: 7/15 00:00:00 5kN 1.Nh5+-- +- (4.59) Depth: 8/17 00:00:00 8kN 1.Nh5+ Kh8 2.Nf6 Bf7 3.Kf4 Bb3 4.Ke5 Bf7 5.Kd6 +- (3.56) Depth: 8/17 00:00:00 12kN, tb=1 1.Nh5+! +- (3.88) Depth: 9/15 00:00:00 18kN, tb=3 1.Nh5+! Kxh7 2.Nf6+ Kg7 3.Nxd5 Kf7 4.f6 Kg8 5.Kg6 Kf8 6.f7 +- (5.00) Depth: 9/19 00:00:00 23kN, tb=4 1.Nh5+-- +- (4.69) Depth: 10/19 00:00:00 33kN, tb=7 1.Nh5+ Kh8 2.Nf6 Bf7 3.Kf4 Bb3 4.Ke5 Bc4 5.Kd6 Bd3 6.Ke6 +- (3.66) Depth: 10/19 00:00:01 45kN, tb=9 1.Nh5+! +- (3.97) Depth: 11/18 00:00:01 67kN, tb=13 1.Nh5+ Kh8 2.Kh6 Be4 3.f6 Bd5 4.Ng7 Bf7 5.Nf5 Be6 6.Nd6 Bd5 +- (4.06) Depth: 11/19 00:00:01 75kN, tb=14 1.Nh5+-- +- (3.75) Depth: 12/20 00:00:01 99kN, tb=21 1.Nh5+ +- (3.75) Depth: 12/20 00:00:01 103kN, tb=21 1.Nh5+! +- (4.06) Depth: 13/18 00:00:01 131kN, tb=40 1.Nh5+! Kh8 2.Kh6 Be4 3.f6 Bg6 4.Nf4 Bf7 5.Nh3 Bg8 6.hxg8Q+ Kxg8 +- (4.97) Depth: 13/22 00:00:01 162kN, tb=54 1.Nh5+! +- (5.28) Depth: 14/22 00:00:01 209kN, tb=93 1.Nh5+! +- (5.59) Depth: 15/25 00:00:02 317kN, tb=162 1.Nh5+! Kxh7 2.Nf6+ Kg7 3.Nxd5 Kf7 4.f6 Kg8 5.Kg6 Kf8 6.Nc7 Kg8 +- (9.22) Depth: 15/25 00:00:02 464kN, tb=235 1.Nh5+! +- (9.53) Depth: 16/24 00:00:03 913kN, tb=314 1.Nh5+! Kxh7 2.Nf6+ Kg7 3.Nxd5 Kf7 4.f6 Kf8 +- (12.59) Depth: 16/25 00:00:03 1427kN, tb=358 1.Nh5+! +- (12.91) Depth: 17/27 00:00:04 1966kN, tb=523 (Larsson, MyTown 24.06.2001)
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