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Up Topic Rybka Support & Discussion / Rybka Discussion / Rare position where Shredder gets it and Rybka doesn't
- - By billyraybar (***) Date 2009-10-08 22:11
2r4k/R5pP/3p2P1/8/1p6/pPb5/2N5/3K4 b - - 0 44


Shredder is white , Rybka is black.

Rybka apparently doesn't see the need to play Re8 and stop the white knight.

Play continues 
44... Rf8 {(Re8) 0.00/23 53} 45. Ra4 {1.46/19 6} Rd8 {(d5) 0.03/22 39
} 46. Ne3 {2.01/20 6} d5 {0.23/24 20} 47. Nf5 {1.99/22 0} Be5 {0.43/24 62} 48.
Ke2 {(Ta6) 2.02/24 0} Rc8 {0.43/21 11} 49. Ne7 {2.04/21 0} Rf8 {(Re8) 0.54/22 8
} 50. Ke3 {(Sc6) 2.24/20 7} Bc3 {(Re8) 0.54/20 13} 51. Nxd5 {(Sc6) 2.40/20 12}
Rd8 {(Re8+) 0.54/21 10} 52. Ne7 {(Ta6) 3.82/19 7} Bf6 {(Bd2+) 0.82/17 7} 53.
Nc6 {(Sf5) 4.26/19 4} Re8+ {(Rf8) 0.54/5 0} 54. Kd3 {4.94/20 8} Bc3 {1.32/20 2}
55. Kc4  1-0
Parent - By billyraybar (***) Date 2009-10-09 12:02
Does Rybka cluster also evaluate this position as 0?
Parent - - By Omega-three (**) Date 2009-10-09 12:50
No problem for rybka 3 here.

[+0.00]  d=26  44...Re8 45.Kc1 d5 46.Ra4 d4 47.Nxb4 Bxb4 48.Rxb4 Rc8 49.Kb1 d3 50.Rd4 d2 51.Rxd2 a2 52.Rxa2 Rc1 53.Kxc1 (0:02:47) 23213kN
[+0.00]  d=25  44...Re8 45.Kc1 d5 46.Ra4 d4 47.Nxb4 Bxb4 48.Rxb4 Rc8 49.Kb1 d3 50.Rd4 d2 51.Rxd2 a2 52.Rxa2 Rc1 53.Kxc1 (0:01:58) 15772kN
[+0.00]  d=24  44...Re8 45.Kc1 d5 46.Ra4 d4 47.Nxb4 Bxb4 48.Rxb4 Rc8 49.Kb1 d3 50.Rd4 d2 51.Rxd2 a2 52.Rxa2 Rc1 53.Kxc1 (0:01:32) 11899kN
[+0.00]  d=23  44...Re8 45.Kc1 d5 46.Ra4 d4 47.Nxb4 Bxb4 48.Rxb4 Rc8 49.Kb1 d3 50.Rd4 d2 51.Rxd2 a2 52.Rxa2 Rc1 53.Kxc1 (0:01:15) 9358kN
[+0.00]  d=22  44...Rb8 45.Ra6 Rd8 46.Ne3 d5 47.Kc2 d4 48.Nc4 d3 49.Kd1 Re8 50.Ra8 Rxa8 51.Nd6 Rf8 52.Nf7 Rxf7 53.gxf7 Kxh7 54.f8Q a2 55.Qf5 g6 56.Qh3 Kg7 57.Qd7 Kh6 58.Qh3 Kg7 59.Qd7 Kh6 (0:00:43) 4580kN
[+0.00]  d=21  44...Rb8 45.Ra6 Rd8 46.Ne3 d5 47.Kc2 d4 48.Nc4 d3 49.Kd1 Re8 50.Ra8 Rxa8 51.Nd6 Rf8 52.Nf7 Rxf7 53.gxf7 Kxh7 54.f8Q a2 55.Qf5 g6 56.Qh3 Kg7 57.Qd7 Kh6 58.Qh3 Kg7 59.Qd7 Kh6 (0:00:36) 4277kN
[+0.00]  d=20  44...Rb8 45.Ra6 Re8 46.Kc1 d5 47.Ne3 d4 48.Nc4 d3 49.Ra8 d2 50.Kd1 Rxa8 51.Nd6 Rf8 52.Nf7 Rxf7 53.gxf7 Kxh7 54.f8Q a2 55.Qf5 g6 56.Qh3 Kg7 57.Qd7 Kh6 58.Qh3 Kg7 59.Qd7 Kh6 (0:00:25) 2735kN
[+0.00]  d=19  44...Rb8 45.Ra6 Re8 46.Kc1 d5 47.Ne3 d4 48.Nc4 d3 49.Ra8 d2 50.Kd1 Rxa8 51.Nd6 Rf8 52.Nf7 Rxf7 53.gxf7 Kxh7 54.f8Q a2 55.Qf5 g6 56.Qh3 Kg7 57.Qd7 Kh6 58.Qh3 Kg7 59.Qd7 Kh6 (0:00:23) 2440kN
[+0.00]  d=18  44...Rb8 45.Ra6 d5 46.Ne3 Rd8 47.Kc2 d4 48.Nc4 d3 49.Kd1 Bf6 (0:00:20) 1986kN
[+0.00]  d=17  44...Rb8 45.Ra6 d5 46.Ne3 Rd8 47.Kc2 Bf6 48.Kd3 Bc3 49.Kc2 Bf6 50.Kd3 Bc3 51.Kc2 Bf6 52.Kd3 Bc3 53.Kc2 Bf6 54.Kd3 Bc3 55.Kc2 Bf6 56.Kd3 Bc3 57.Kc2 Bf6 58.Kd3 Bc3 59.Kc2 Bf6 (0:00:11) 1526kN
[-0.55]  d=16  44...Rb8 45.Ke2 d5 46.Kd3 d4 47.Ra4 Rf8 48.Ra7 Rc8 49.Ra4 (0:00:03) 326kN
[-0.55]  d=15  44...Rb8 45.Ke2 d5 46.Kd3 d4 47.Ra4 Rf8 48.Ra7 (0:00:02) 274kN
[-0.55]  d=14  44...Re8 45.Kc1 d5 46.Ra4 Rb8 47.Kd1 Rc8 48.Ke2 Re8 49.Kd3 d4 50.Ra7 Rd8 51.Ra4 (0:00:01) 75kN
[-0.55]  d=13  44...Re8 45.Kc1 d5 46.Ra4 Rb8 47.Kd1 Rc8 48.Ke2 Re8 49.Kd3 d4 50.Ra7 Rd8 51.Ra4 (0:00:01) 27kN
[-0.82]  d=12  44...Re8 45.Kc1 (0:00:00) 0kN
[-0.82]  d=11  44...Re8 45.Kc1 (0:00:00) 0kN
[-0.86]  d=4  44...Rb8 45.Ke2 (0:00:00) 0kN
[-0.86]  d=3  44...Rb8 45.Ke2 (0:00:00) 0kN
[-1.07]  d=2  44...Rf8 45.Ke2 (0:00:00)
Parent - - By billyraybar (***) Date 2009-10-09 13:42 Edited 2009-10-09 14:18
Hmm. Guess Rybka played wrong move rf8 in game play at low depth - 23. Also I missed d5 saving it all for black regardless. Thanks omega three for correction.
Parent - By Felix Kling (Gold) Date 2009-10-09 14:54
no, you are right, Rybka doesn't get it. at least on my comp the score is way too low when replaying your moves.
Up Topic Rybka Support & Discussion / Rybka Discussion / Rare position where Shredder gets it and Rybka doesn't

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