Author: Roy Brunjes
Date: 07:14:38 03/23/05
Go up one level in this thread
On March 23, 2005 at 09:56:43, Tom Brake wrote: >[D]k3rr2/ppp1nqbp/3pp1b1/PP2p3/NNP1Pp1Q/3P1P2/5BPP/RR2K3 w - - 0 1 > >Bxa7! Apparently not too easy to find for silicon, even in such a contrived >position. > >On an amd64-3000 CM9K: > >Time Depth Score Positions Moves >0:00 1/3 -0.07 948 1.a6 b6 2.Kf1 >0:00 1/4 -0.15 2541 1.a6 b6 2.Kf1 Rg8 >0:00 1/5 -0.14 11706 1.a6 b6 2.Kf1 Rg8 3.Nc3 >0:00 1/6 -0.33 42619 1.a6 b6 2.Kf1 Bf6 3.Qh3 Rg8 >0:00 1/7 -0.22 99322 1.a6 b6 2.Nc3 Bf6 3.Qh3 h5 4.Kf1 >0:01 1/8 -0.42 346669 1.a6 b6 2.Kf1 Bf6 3.Qh6 Rg8 4.d4 > Bh5 >0:02 1/8 -0.39 871543 1.Kd2 Bf6 2.Qh3 h5 3.a6 b6 4.g4 Rh8 >0:03 1/8 -0.22 1158857 1.b6 c5 2.Nxc5 dxc5 3.Bxc5 Qf6 > 4.Qf2 Rd8 5.bxa7 Rfe8 >0:05 1/9 -0.04 1767257 1.b6 c5 2.Nxc5 dxc5 3.Bxc5 Qf6 > 4.Qf2 Rd8 5.bxa7 Rfe8 6.Kf1 >0:15 2/10 0.20 4752869 1.b6 c5 2.Nxc5 dxc5 3.Bxc5 Rg8 > 4.a6 axb6 5.Bxb6 Nc6 6.Nxc6 bxc6 > 7.Kd2 Qe7 >0:54 2/11 0.54 18266260 1.b6 c5 2.Bxc5 Bf6 3.Qf2 Nc8 4.a6 > h6 5.bxa7 dxc5 6.axb7+ Qxb7 7.Nxc5 >1:35 2/11 0.98 32555331 1.Bxa7 Bf6 2.Qf2 Nc8 3.a6 b6 4.Nc6 > Bd8 5.Bb8 Qd7 6.Kf1 >2:32 2/12 1.04 51816526 1.Bxa7 Bf6 2.Qf2 Nc8 3.a6 b6 4.Bxb6 > cxb6 5.Nxb6+ Nxb6 6.Qxb6 Rc8 7.Nc6 > Rg8 >5:24 3/13 1.04 120242828 1.Bxa7 Bf6 2.Qf2 Nc8 3.a6 b6 4.Nc6 > Bd8 5.Nxd8 Rxd8 6.Bxb6 cxb6 7.Nxb6+ > Nxb6 8.Qxb6 Qd7 Interesting position. Look how long it takes Shredder 9 to finish its fail high : Shredder 9 UCI by Stefan Meyer-Kahlen, www.shredderchess.com CPU0: GenuineIntel x86 Family 6 Model 13 Stepping 6 598 MHz GUI: Tablebases with 5 pieces found! [Cache: 64 MB + internal 13.67 MB] Engine: Shredder 9 UCI (512 MB) by Stefan Meyer-Kahlen Position: 0 1 10/30 0:01 +0.88 1.Nc3 Bf6 2.Qh3 Rg8 3.Kd2 Kb8 4.a6 b6 5.Kc2 Rd8 6.Rc1 (658.575) 476 11/40 0:02 +0.89 1.Nc3 Rg8 2.Ke2 Kb8 3.b6 axb6 4.axb6 c5 5.Nc2 Bf6 6.Qh6 Kc8 (1.199.099) 467 12/36 0:05 +1.04 1.Nc3 Rg8 2.Ke2 h6 3.Qh3 (2.309.848) 455 13/36 0:07 +0.92 1.Nc3 Rg8 2.Ke2 Bf6 3.Qh3 Nc8 4.a6 b6 5.Re1 Bh5 6.Ra3 Ne7 7.Kd2 (3.545.301) 455 13/36 0:09 +0.93++ 1.b6 (4.619.961) 462 13/36 0:10 +0.93 1.b6 c5 2.a6 cxb4 (4.789.443) 463 13/36 0:13 +0.94++ 1.Bg1 (6.394.600) 458 13/36 0:19 +0.95 1.Bg1 Nc8 2.Nc3 Rg8 (9.243.851) 465 14/34 0:23 +0.95 1.Bg1 Nc8 2.Nc3 Rg8 3.Kd2 Bf6 4.Qf2 Bh5 5.a6 b6 6.Kc1 Ne7 (11.004.335) 466 14/36 0:25 +0.96++ 1.Nc3 (11.962.960) 463 14/40 0:32 +1.07 1.Nc3 Bf6 2.Qh3 Nc8 3.Ke2 Rg8 4.a6 (14.964.847) 460 15/37 0:43 +1.04 1.Nc3 Bf6 2.Qh3 Nc8 3.Kd2 Rg8 4.a6 b6 5.Nc6 Ne7 6.Ra2 Bh5 7.Kc1 Nxc6 8.bxc6 Kb8 9.Rab2 Qg6 (20.105.486) 464 15/37 0:52 +1.05++ 1.Bxa7 (24.254.817) 466 15/38 0:57 +1.40++ 1.Bxa7 (26.818.370) 466 15/50 9:48 +3.13 1.Bxa7 Nf5 2.exf5 exf5 3.b6 e4 4.Nd5 (267.142.481) 454 That's on a 1.8 GHz Centrino. That's one of the biggest fail highs I've seen in a very long time! Roy
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