Author: Ulrich Tuerke
Date: 08:39:12 11/16/02
Go up one level in this thread
On November 16, 2002 at 11:06:50, John Merlino wrote: >On November 16, 2002 at 10:34:14, Steffen Basting wrote: > >>Hi! >>A position of a game I played: >>[D] 4n3/2q3kb/1p6/2p1P1p1/1PPp1QNb/7B/7P/B5K1 w - - 0 1 >> >>How long does it take your engine to play Nf6 and then Fail Low on it? >> >>Regards, Steffen > >Good position. CM9000, on a P3-733, plays Nf6 from the beginning, fails low at >54 seconds, and does not choose another move (Qf3) until 6:39. Brutal.... Similar observation with comet on K7/2k . The fail low verification search takes extremely long here. New position 4n3/2q3kb/1p6/2p1P1p1/1PPp1QNb/7B/7P/B5K1 w - - 0 1 Analysis by Comet B54: 1.bxc5 gxf4 2.Bxd4 bxc5 -+ (-9.92) Depth: 1/7 00:00:00 1.Qf6+ Nxf6 2.exf6+ Kf7 -+ (-8.44) Depth: 1/9 00:00:00 1.Nf6 = (-0.15) Depth: 1/9 00:00:00 1.Nf6 gxf4 -+ (-11.05) Depth: 2/10 00:00:00 1.Qd2 Qa7 = (-0.24) Depth: 2/10 00:00:00 1.Qd2 Qd7 ³ (-0.30) Depth: 2/10 00:00:00 1.Qd2 Qb8 2.bxc5 bxc5 ³ (-0.30) Depth: 3/10 00:00:00 1.Qd2 Qa7 2.Bb2 = (0.11) Depth: 3/10 00:00:00 1.Qd2 Qa7 2.Bb2 = (0.11) Depth: 3/10 00:00:00 1.Qd2 Qa7 2.Bb2 Bg6 = (0.08) Depth: 4/10 00:00:00 1.Qf3 Qa7 2.Bb2 Bg6 = (0.09) Depth: 4/11 00:00:00 1.Qc1 = (0.10) Depth: 4/13 00:00:00 1.Nf6 g4 2.Bb2 Qc8 3.Nxh7 Kxh7 = (0.12) Depth: 4/19 00:00:00 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Be6+ Bf7 5.Bxf7+ Kf8 ² (0.39) Depth: 4/19 00:00:00 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 Bf7 ² (0.39) Depth: 4/23 00:00:00 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Be6+ Qf7 5.Bxf7+ Bxf7 ² (0.39) Depth: 5/23 00:00:00 29kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Be6+ Bf7 5.Qg6+ Kf8 6.Bxf7 Qxf7 7.Qxb6 ² (0.41) Depth: 5/23 00:00:00 36kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ ² (0.41) Depth: 6/23 00:00:00 66kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ ² (0.41) Depth: 6/23 00:00:00 75kN 1.Nf6 Bg6 2.Nxe8+ Kg8 3.Nxc7 gxf4 ² (0.41) Depth: 7/28 00:00:00 153kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kh7 4.Bg4 Qa7 5.Bb2 ² (0.58) Depth: 7/28 00:00:00 288kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kh7 4.Bg4 Qa7 5.Bb2 Bb5 ² (0.58) Depth: 8/28 00:00:00 443kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Be6+ Bf7 5.Qf3 ² (0.58) Depth: 8/28 00:00:01 535kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 Bf2+ 5.Kxf2 cxb4 ² (0.58) Depth: 9/30 00:00:01 1066kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 Bf2+ 5.Kxf2 cxb4 ± (0.85) Depth: 9/31 00:00:02 1455kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 cxb4 5.Bxd4 Bf7 6.Be6 Bxe6 7.Qxe6+ Qf7 8.Qxf7+ Kxf7 9.Bxb6 ± (0.93) Depth: 9/31 00:00:03 1749kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 ± (0.92) Depth: 10/31 00:00:03 2101kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Be6+ Bf7 5.Qg6+ Kf8 6.Bxf7 Qxf7 7.Qxb6 Qf5 8.bxc5 Qxe5 ± (0.92) Depth: 10/38 00:00:06 4000kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 Qb7 5.Bb2 cxb4 6.Bxd4 b5 7.cxb5 Bxb5 ± (0.92) Depth: 11/38 00:00:11 7198kN 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 4.Bf5 Qb7 5.Bb2 Qc7 6.h3 cxb4 7.Be6+ Bf7 8.Bxd4 Bxe6 9.Qxe6+ Qf7 10.Qxf7+ Kxf7 11.Bxb6 ± (0.93) Depth: 11/38 00:00:15 9513kN 1.Nf6 gxf4 2.Nxe8+ Kh8 3.Nxc7 f3 4.Bf1 Be4 5.h3 Bg3 6.Be2 fxe2 7.e6 ± (0.92) Depth: 12/38 00:00:18 11536kN 1.Nf6 gxf4 2.Nxe8+ Kh8 3.Nxc7 f3 4.Bf1 Be4 5.h3 Bg3 6.Be2 fxe2 7.e6 ² (0.65) Depth: 12/38 00:00:23 14928kN 1.Nf6 gxf4 2.Nxe8+ Kh8 3.Nxc7 f3 4.Bf1 Be4 5.h3 Bg3 6.Bxd4 cxd4 7.Kh1 f2+ 8.Bg2 = (0.12) Depth: 12/38 00:00:25 16102kN 1.Nf6 gxf4 2.Nxe8+ Kh6 3.Nxc7 f3 4.Bf1 Be4 5.h3 Bg3 6.Be2 fxe2 7.bxc5 ³ (-0.67) Depth: 12/38 00:00:32 20551kN 1.Qf3 Bg8 2.Qa8 Qf7 3.Qd8 Qg6 4.Qd7+ Bf7 ³ (-0.44) Depth: 12/39 00:10:14 428720kN > >Time Depth Score Positions Moves >0:01 1/6 -0.11 57349 1.Qf1 Qf7 2.Qxf7+ Kxf7 3.Nh6+ Kf8 > 4.Bf5 Bxf5 5.Nxf5 >0:00 1/3 0.61 1670 1.Nf6 Qf7 2.Nxe8+ Qxe8 3.Qf6+ Kg8 > 4.Qxb6 >0:00 1/4 0.91 4322 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 >0:00 1/5 0.82 11516 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Be6+ Bf7 5.Bd5 Bxd5 6.cxd5 >0:00 1/6 0.82 34137 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Bg2 Bf7 5.Bd5 Bxd5 6.cxd5 >0:01 1/7 0.82 81811 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Be6+ Bf7 5.Bd5 Bxd5 6.cxd5 >0:02 1/8 0.82 154080 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Be6+ Bf7 5.Bd5 Qa7 6.Bb2 Qd7 >0:04 1/9 0.67 367776 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Bf5 Qg7 5.Qxb6 Qxe5 6.Qe6+ Qxe6 > 7.Bxe6+ Bf7 8.Bxf7+ Kxf7 9.bxc5 >0:09 2/10 0.67 815044 1.Nf6 Bg6 2.Nxe8+ Bxe8 3.Qf6+ Kg8 > 4.Bf5 Qg7 5.Qxb6 Qxe5 6.Qe6+ Qxe6 > 7.Bxe6+ Kf8 8.bxc5 d3 >0:24 3/11 0.12 2170297 1.Nf6 gxf4 2.Nxe8+ Kh6 3.Nxc7 f3 > 4.Bxd4 cxd4 5.Bg4 Kg5 6.Bxf3 Kf4 > 7.Be2 Kxe5 >0:54 4/12 -4.79 4976974 1.Nf6 gxf4 2.Nxe8+ Kh6 3.Nxc7 f3 > 4.Bf1 Be4 5.h3 Bg3 6.Be2 fxe2 7.Bc3 > dxc3 >6:39 4/12 -0.26 33613583 1.Qf3 Bg8 2.Bf1 Qf7 3.Kg2 Qxf3+ > 4.Kxf3 Be1 5.bxc5 bxc5 6.Bd3 Bf7 > 7.Nf2 Bh5+ 8.Kg3 Nc7 > >jm
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