Author: Albert Silver
Date: 12:30:44 02/09/06
Go up one level in this thread
On February 09, 2006 at 13:00:39, Andreas St. wrote: >Hi, >yesterday i posted this position: > >2r5/2pR1pk1/p1P3p1/P2K4/5P1p/5P1P/8/8 w - - 0 1 > >and some users said, Rybka finds the solution. > >>Not Rybka 13b, but Rybka 1.0 Beta 32-bit (the first version!!!) >>Best regards, >>Orlando > >>Rybka 1.0 Beta 32-bit, sees Rxc7 quickly. I've no idea how the person testing >>whatever version had this failure. > >>Terry > > >What do you mean??? No Rybka version finds the only winning move Rxc7! >If you analyse long enough, you will see, all Rybka versions prefers f5. >At the latest after one hour no Rxc7, but f5! >And look at the score of rybka. He sees nothing in this position. >Fritz 9 for example has +3.50 after 42sec. This is true, but it later changes to 1.f5 Analysis by Fritz 9: 1.Rxc7! ± (1.02) Depth: 13/37 00:00:01 1449kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 ± (1.03) Depth: 13/37 00:00:01 1497kN 1.Rxc7-- ± (0.75) Depth: 14/21 00:00:01 1509kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q ³ (-0.52) Depth: 14/28 00:00:01 1631kN 1.Ke5! ³ (-0.52) Depth: 14/28 00:00:01 1754kN 1.Ke5! ³ (-0.36) Depth: 14/28 00:00:01 1793kN 1.Ke5! = (-0.05) Depth: 14/28 00:00:01 1880kN 1.Ke5 Re8+ 2.Kd4 Rc8 3.f5 g5 4.Ke4 Re8+ ² (0.50) Depth: 14/28 00:00:02 2261kN 1.Ke5 Re8+ 2.Kd4 Rc8 3.f5 g5 4.Kd5 Kf6 5.f4 gxf4 6.Ke4 Kg5 7.f6 f3 8.Kxf3 Kxf6 ² (0.26) Depth: 15/28 00:00:02 3223kN 1.Ke5 Re8+ 2.Kd4 Rc8 3.f5 g5 4.Ke4 Re8+ ² (0.26) Depth: 16/38 00:00:04 5115kN 1.Ke5 Re8+ 2.Kd4 Rc8 3.f5 g5 4.Ke4 Re8+ ² (0.26) Depth: 17/43 00:00:06 8388kN 1.f5! ² (0.27) Depth: 17/43 00:00:09 12670kN 1.f5 g5 2.Ke4 Re8+ 3.Kd4 Rc8 4.Ke5 Re8+ ² (0.26) Depth: 18/47 00:00:19 26800kN 1.Rxc7! ² (0.27) Depth: 18/49 00:00:24 33720kN 1.Rxc7! ² (0.42) Depth: 18/49 00:00:25 35705kN 1.Rxc7! ± (0.73) Depth: 18/49 00:00:26 37735kN 1.Rxc7! ± (1.36) Depth: 18/49 00:00:29 42391kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 +- (4.73) Depth: 18/52 00:00:36 53380kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Kf5 +- (4.54) Depth: 19/47 00:00:39 59048kN 1.Rxc7-- +- (4.26) Depth: 20/43 00:00:43 63895kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Ke6 7.Kb7 Kd6 8.Kb6 f6 9.Kxa6 +- (4.20) Depth: 20/50 00:00:46 68479kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 +- (4.07) Depth: 21/52 00:01:02 93976kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Kf5 +- (4.06) Depth: 22/66 00:02:05 196886kN 1.Rxc7-- +- (3.78) Depth: 23/49 00:03:05 291219kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Kf5 7.Kb7 Kxf4 8.Kxa6 Kxf3 9.Kb6 g5 10.a6 Kg2 11.a7 +- (3.56) Depth: 23/68 00:04:11 396698kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 +- (3.68) Depth: 24/69 00:07:57 747110kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Kf5 +- (3.68) Depth: 25/82 00:15:37 1490087kN 1.Rxc7-- +- (3.40) Depth: 26/99 00:21:33 2066409kN 1.Rxc7 Rxc7 2.Kd6 Rc8 3.Kd7 Rh8 4.c7 Kf6 5.c8Q Rxc8 6.Kxc8 Ke6 7.Kc7 Kd5 8.Kb6 Kd6 = (0.24) Depth: 26/99 00:26:10 2507945kN 1.f5! = (0.25) Depth: 26/99 00:55:37 5186817kN 1.f5! ² (0.40) Depth: 26/99 01:19:15 7419257kN (Silver, Private 09.02.2006)
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