Test position

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Yar
Posts: 298
Joined: Wed Mar 08, 2006 9:00 pm
Location: Moscow, Russia

Test position

Post by Yar »

Hello,

How long does it take for your engine to avoid Bxa2 and play nc5! ?
[d] 6k1/1pqn2p1/p4r1p/4rp2/2bNp2Q/2P5/PPB2PPP/3RR2K b - - 0 26

Rybka 3 failed to avoid Bxa2 after 2 hours on my Core 2 Duo 6750:
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.h2-h3 Nd7-c5 30.Qh4-g3 Qc7-e7 31.Nd4-f3 Re5-d5 32.Qg3-b8+ Qe7-f8 33.Qb8xf8+ Kg8xf8 34.Nf3-d4 Rd5-d6 35.b2-b4 Nc5-e6 36.Nd4xe6+ Rd6xe6 37.Re1xe4 Re6-d6 38.Re4-e1 Rd6xd1 39.Re1xd1 b7-b6 40.Kh1-g1 Rf6-c6 41.Rd1-d3 Bf7-c4
= (-0.19) Depth: 21 02:37:12 552mN

Cluster Rybka was able to find Nc5 ! and win. Game you cand find below:
[Event "Friendly Game, 60m + 30s"]
[Site "Engine Room"]
[Date "2009.10.29"]
[Round "?"]
[White "Highendman"]
[Black "Rechenschieber, Rybka 3w91 clusterJB"]
[Result "0-1"]
[ECO "B41"]
[WhiteElo "2562"]
[Annotator "0.00;-0.06"]
[PlyCount "120"]
[EventDate "2009.10.29"]
[TimeControl "3600+30"]

{2048 MB} 1. e4 {1} c5 {-0.05/1 0} 2. Nf3 {2} e6 {-0.05/1 0} 3. d4 {2} cxd4 {
-0.05/1 0} 4. Nxd4 {1} a6 {-0.05/1 0} 5. Be3 {107} Nf6 {-0.05/1 0} 6. Nd2 {72}
Qc7 {-0.06/19 197} 7. Bd3 {28 (c4)} e5 {-0.08/19 308} 8. N4b3 {165 (Nf5)} d5 {
-0.13/20 264} 9. O-O {368} Be6 {-0.14/20 6} 10. Bg5 {105} Nbd7 {-0.13/19 183}
11. Qe2 {5 (Re1)} Bd6 {-0.11/19 459} 12. exd5 {38} Nxd5 {-0.06/19 216} 13. Ne4
{6 (Nc4)} h6 {-0.05/19 209} 14. Nxd6+ {5} Qxd6 {-0.06/19 70} 15. Qh5 {7 (Bd2)}
N7f6 {-0.13/20 294} 16. Bxf6 {127} Nxf6 {-0.13/20 68} 17. Qe2 {3} O-O {-0.08/
21 249} 18. Rfe1 {5 (Rad1)} Nd7 {-0.09/20 230} 19. Rad1 {58} Qc7 {-0.11/19 150}
20. c3 {257} Rae8 {-0.10/20 0} 21. Bc2 {134 (Qd2)} f5 {-0.13/18 158} 22. Qe3 {
9 (f3)} Rf6 {-0.14/19 156} 23. Kh1 {9 (f3)} e4 {-0.23/19 190} 24. Nd4 {33} Bc4
{-0.24/18 116} 25. Qh3 {67} Re5 {-0.26/19 35} 26. Qh4 {380 (b3)} Nc5 {-0.38/18
198} 27. Qf4 {8} Kh7 {-0.38/17 120} 28. Nb3 {60} Na4 {-0.33/18 43} 29. Qc1 {36}
b5 {-0.38/17 72} 30. a3 {229 (Kg1)} Re7 {-0.40/17 122} 31. Kg1 {17} g6 {-0.47/
17 67} 32. h3 {55} Rf8 {-0.42/17 16} 33. h4 {177} h5 {-0.46/19 0} 34. Rd4 {310
(Nd4)} Bf7 {-0.63/20 127} 35. Nd2 {8} Nc5 {-0.63/19 46} 36. Nf1 {5} Bb3 {-0.65/
18 53} 37. Red1 {86} Rg7 {-0.64/19 0} 38. Qb1 {69} Bxc2 {-0.68/20 0} 39. Qxc2 {
2} Nd3 {-0.68/19 65} 40. R1xd3 {214} exd3 {-0.69/23 0} 41. Qxd3 {2} Re7 {-0.69/
22 16} 42. Rd6 {60 (Ne3)} Rff7 {-1.18/19 38} 43. Rxa6 {56} Re1 {-1.23/21 0} 44.
Rd6 {60} Qc4 {-1.28/22 0} 45. g3 {13} Qxd3 {-1.27/22 26} 46. Rxd3 {6} f4 {-1.
38/24 92} 47. gxf4 {4} Rxf4 {-1.38/25 33} 48. f3 {4} Rxh4 {-1.44/25 72} 49. Rd2
{12} Kh6 {-1.62/24 44} 50. Kf2 {24} Rb1 {-1.62/24 32} 51. Kg2 {43} Rf4 {-1.58/
23 14} 52. Ng3 {83} h4 {-1.77/25 0} 53. Ne4 {1} Re1 {-1.77/25 61} 54. Nf2 {7}
Rf7 {-1.82/23 50} 55. Ng4+ {11} Kh5 {-2.07/23 43} 56. Kf2 {21 (Rd5+)} Re4 {-1.
94/24 78} 57. Nh2 {131 (Kg2)} g5 {-2.33/24 67} 58. Rd8 {8} Rf5 {-2.40/21 23}
59. Rh8+ {94 (Rg8)} Kg6 {-2.40/16 0} 60. Rd8 {10} Kg7 {-3.19/19 37 Highendman resigns} 0-1

With best regards,
Yar
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jarkkop
Posts: 198
Joined: Thu Mar 09, 2006 2:44 am
Location: Helsinki, Finland

Re: Test position

Post by jarkkop »

[d]6k1/1pqn2p1/p4r1p/4rp2/2bNp2Q/2P5/PPB2PPP/3RR2K b - - 0 1
386MB hash ,Q8400@3.2GHz
?Lito:

= (-0.01) Depth: 13/32 00:00:01 1519kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.Qe3 Kg7 7.b3 Rf8 8.Kg1 Rc8 9.Kh1
³ (-0.27) Depth: 13/32 00:00:01 1681kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.Qe3 Kg7 7.b3 Rf8 8.Kg1 Rc8 9.Kh1
³ (-0.27) Depth: 13/32 00:00:01 1681kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.Qe3 Kh7 7.b3 Rb6 8.b4 Ne6 9.Nf3 Rd6
= (-0.01) Depth: 14/34 00:00:02 2984kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.b3 Ne4 7.Bxe4 fxe4 8.c4 Qe5 9.Nf3 Qf4 10.Rd8+ Rf8 11.Rxf8+ Kxf8
= (-0.25) Depth: 14/34 00:00:02 3229kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.b3 Ne4 7.Bxe4 fxe4 8.c4 Qe5 9.Nf3 Qf4 10.Rd8+ Rf8 11.Rxf8+ Kxf8
= (-0.25) Depth: 14/34 00:00:02 3229kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.b3 Ne4 7.Bxe4 fxe4 8.c4 Qe5 9.Nf3 Qf4 10.Rd8+ Rf8 11.Rxf8+ Kxf8
= (-0.25) Depth: 15/34 00:00:03 3793kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.b3 Ne4 7.Bxe4 fxe4 8.c4 Qe5 9.Nf3 Qf4 10.Rd8+ Rf8 11.Rxf8+ Kxf8
= (-0.25) Depth: 15/34 00:00:03 4247kN
1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+ 4.Qxe1 Nc5 5.Nd4 g6 6.b3 Ne4 7.Bxe4 fxe4 8.c4 Qe5 9.Nf3 Qf4 10.Rd8+ Rf8 11.Rxf8+ Kxf8
= (-0.01) Depth: 16/42 00:00:04 5616kN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Nxb3 6.axb3 g6 7.b4 Rd6 8.g3 Kg7 9.Kg2 Rc8 10.Re3 Rcd8
= (-0.23) Depth: 16/49 00:00:11 14254kN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Nxb3 6.axb3 g6 7.b4 Rd6 8.g3 Kg7 9.Kg2 Rc8 10.Re3 Rcd8
= (-0.23) Depth: 16/49 00:00:12 15596kN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Nxb3 6.axb3 g6 7.b4 Rd6 8.h3 h5 9.Kh2 Kg7 10.h4 Rc8 11.Re3 f4
= (-0.22) Depth: 17/49 00:00:17 20925kN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Nxb3 6.axb3 g6 7.b4 Rd6 8.h3 h5 9.Kh2 Kg7 10.h4 Rc8 11.Re3 f4
= (-0.22) Depth: 17/49 00:00:21 25561kN
1...Nc5 2.Qf4 Re7 3.Qd2 Nd3 4.Bxd3 Bxd3 5.a4 Rd7 6.h3 Kh7 7.Rc1 Rd8 8.Rcd1 Kh8 9.b4 Rc8 10.Rc1 f4 11.a5 Qc4
= (-0.24) Depth: 18/49 00:00:30 36888kN
1...Nc5 2.Qf4 Re7 3.Qd2 Nd3 4.Bxd3 Bxd3 5.a4 Rd7 6.h3 Kh7 7.Rc1 Rd8 8.Rcd1 Kh8 9.b4 Rc8 10.Rc1 f4 11.a5 Qc4
= (-0.24) Depth: 18/49 00:00:36 43985kN
1...Nc5 2.Qf4 Re7 3.Qd2 Nd3 4.Bxd3 Bxd3 5.a4 Rd7 6.b3 Rd8 7.h3 Kh7 8.Rc1 Qd6 9.b4 Bc4 10.Rcd1 Rg6 11.g3 Rg5
³ (-0.27) Depth: 19/49 00:00:55 67748kN
1...Nc5 2.Qf4 Re7 3.Qd2 Nd3 4.Bxd3 Bxd3 5.a4 Rd7 6.b3 Rd8 7.h3 Kh7 8.Rc1 Qd6 9.b4 Bc4 10.Rcd1 Rg6 11.g3 Rg5
³ (-0.27) Depth: 19/49 00:01:00 74441kN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Kh7 6.Rd2 g6 7.f3 Rd6 8.Bd1 Re7 9.b4 Ne6 10.fxe4 Bxe4 11.Bc2 Nxd4 12.Rxd4 Rxd4
= (-0.20) Depth: 20/49 00:01:46 134mN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Kh7 6.Rd2 g6 7.f3 Rd6 8.Bd1 Re7 9.b4 Ne6 10.fxe4 Bxe4 11.Bc2 Nxd4 12.Rxd4 Rxd4
= (-0.20) Depth: 20/63 00:04:11 321mN
1...Nc5 2.Qf4 Re7 3.Qxc7 Rxc7 4.Kg1 Bd3 5.Bb3+ Kh7 6.Rd2 g6 7.f3 Kg7 8.Bd5 Rd7 9.c4 b5 10.b3 bxc4 11.bxc4 Rfd6 12.Red1 Rb6 13.Re1 Re7 14.fxe4 Bxe4
= (-0.20) Depth: 21/63 00:04:48 369mN
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User avatar
meschle
Posts: 200
Joined: Tue Apr 01, 2008 11:53 pm

Re: Test position

Post by meschle »

Rybka WinFinder v2.2.mp.w32: settles on it :)

4 00:00 2.490 26.839 +0.30 Bc4xa2
5 00:00 3.802 30.898 +0.30 Bc4xa2
6 00:00 8.452 39.340 +0.37 Bc4xa2 b2b3
7 00:00 13.503 44.175 +0.30 Bc4xa2 b2b3 Qc7xc3
8 00:01 50.805 50.411 +0.22 Bc4xa2 f2f3 e4xf3 Nd4xf3 Re5xe1+ Rd1xe1 Ba2d5
9 00:02 110.187 51.193 +0.15 Bc4xa2 f2f3 e4xf3 Nd4xf3 Re5xe1+ Rd1xe1 Ba2f7 Nf3d4
10 00:05 277.740 54.162 +0.15 Bc4xa2 f2f3 g7g5 Qh4f2 Ba2c4 Kh1g1
10 00:07 379.409 54.758 +0.22 Nd7c5 Qh4f4
11 00:09 515.512 55.287 +0.15 Nd7c5 Qh4f4 g7g5 Qf4g3 Bc4d3 Bc2b3+ Nc5xb3 a2xb3 Re5c5
12 00:18 1.017.518 55.614 +0.15 Nd7c5 Qh4f4 g7g5 Qf4e3 Rf6b6 b2b4 Nc5e6 h2h4
12 00:19 1.017.518 55.614 +0.18 Bc4xa2
12 00:19 1.017.518 55.614 +0.15 Bc4xa2
12 00:20 1.093.158 55.749 +0.18 Bc4xa2 f2f3 g7g5 Qh4f2 Ba2d5 f3f4 Re5e7 f4xg5 h6xg5
13 00:41 2.304.032 56.509 +0.15 Bc4xa2 f2f3
14 01:34 4.751.251 51.560 +0.07 Bc4xa2 f2f3 Ba2d5 f3xe4 f5xe4 Bc2xe4 Bd5xe4 Re1xe4 Nd7c5 Re4xe5 Qc7xe5 Nd4f3 Qe5f5 Qh4c4+
14 01:48 5.492.766 52.079 +0.22 Nd7c5 Qh4f4 g7g5 Qf4e3 f5f4 Qe3h3 a6a5 Bc2b3 Bc4xb3 a2xb3 Re5d5
15 02:53 8.557.095 50.622 +0.22 Nd7c5 Qh4f4 g7g5 Qf4g3 f5f4 Qg3g4 a6a5 Nd4b3 Bc4d5 c3c4 Nc5xb3
16 05:15 15.854.920 51.426 +0.22 Nd7c5 Qh4f4 g7g5 Qf4d2 f5f4 b2b4 Nc5d3 Bc2xd3 Bc4xd3 f2f3 b7b5 Nd4b3 Re5d5
Regards Mark

Quad Q6600 3.0 Ghz, Vista 64bit, 4gb Ram
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Test position

Post by kgburcham »

[d] 6k1/1pqn2p1/p4r1p/4rp2/2bNp2Q/2P5/PPB2PPP/3RR2K b - -

Engine: Rybka 3 (2048 MB)
by Vasik Rajlich, Larry Kaufman

12.01 0:01 -0.23 26...Bxa2 27.f3 exf3 28.Nxf3 Rxe1+ 29.Qxe1 Bc4 30.Nd4 g6 31.Qe7 Rd6 32.Qe8+ Nf8 (370.769) 256
13.01 0:03 -0.14 26...Bxa2 27.f3 exf3 28.Nxf3 Rxe1+ 29.Qxe1 Bc4 30.Nd4 g6 31.Qe7 Rf7 32.Qh4 Kh7 33.Nf3 Kg7 (960.723) 260
13.10 0:06 -0.24 26...Nc5 27.f3 Bd3 28.Bb3+ Nxb3 29.axb3 Rd5 30.Qh5 Qd6 31.b4 Rf7 32.Qh4 (1.872.648) 274
14.01 0:08 -0.22 26...Nc5 27.f3 Bd3 28.Bb3+ Nxb3 29.axb3 Rd5 30.Qh5 Qd6 31.b4 Rf7 32.Qh4 Rf8 (2.241.781) 281
15.01 0:14 -0.26 26...Nc5 27.f3 Bd3 28.Bb3+ Kh7 29.Qf2 Qd6 30.Nc2 Nxb3 31.axb3 a5 32.Nd4 Rd5 33.Qe3 Rf8 (4.112.698) 287
16.01 0:26 -0.20 26...Nc5 27.Qf4 Re7 28.Qxc7 Rxc7 29.Kg1 Bd3 30.Bb3+ Kh7 31.Rd2 Rd7 32.f3 Rd8 33.g3 Rff8 34.fxe4 fxe4 35.Kg2 (7.226.448) 283
17.01 0:37 -0.20 26...Nc5 27.Qf4 Re7 28.Qxc7 Rxc7 29.Kg1 Bd3 30.Bb3+ Kh7 31.Rd2 Rd7 32.f3 Rd8 33.g3 Rff8 34.fxe4 fxe4 35.Kg2 (10.364.982) 283
18.01 1:18 -0.20 26...Nc5 27.Qf4 Re7 28.Qxc7 Rxc7 29.Kg1 Bd3 30.Bb3+ Kh7 31.Rd2 Rd7 32.f3 Rd8 33.g3 Rff8 34.fxe4 fxe4 35.Kg2 Nxb3 (22.174.057) 290
19.01 4:04 -0.23 26...Nc5 27.Qf4 Re7 28.Qxc7 Rxc7 29.Kg1 Bd3 30.Bb3+ Kh7 31.Rd2 g6 32.f3 Kg7 33.Bd1 b5 34.Be2 Bxe2 35.Rexe2 Re7 36.fxe4 (77.672.171) 324
20.01 6:16 -0.20 26...Nc5 27.Qf4 Re7 28.Qxc7 Rxc7 29.Kg1 Bd3 30.Bb3+ Kh7 31.Rd2 g6 32.f3 Kg7 33.Bd1 h5 34.Be2 Bxe2 35.Rexe2 Re7 36.Rd1 Rff7 (116.938.071) 318
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Yar
Posts: 298
Joined: Wed Mar 08, 2006 9:00 pm
Location: Moscow, Russia

Re: Test position

Post by Yar »

After 15 hours rybka can't avoid Bxa2:

26...Bc4xa2 27.f2-f3 e4xf3
=/+ (-0.27) Depth: 6 00:00:00 7kN
26...Bc4xa2 27.f2-f3 e4xf3 28.Nd4xf3 Re5xe1+ 29.Qh4xe1
=/+ (-0.32) Depth: 7 00:00:00 14kN
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.Qh4-g3 Rf6-g6
=/+ (-0.39) Depth: 8 00:00:01 38kN
26...Bc4xa2 27.f2-f3 e4xf3 28.Nd4xf3 Re5xe1+ 29.Qh4xe1 Nd7-c5 30.Nf3-d4 g7-g6 31.Qe1-e3
= (-0.17) Depth: 9 00:00:02 79kN
26...Bc4xa2
=/+ (-0.37 !) Depth: 10 00:00:04 176kN
26...Bc4xa2 27.f2-f3 e4xf3 28.Nd4xf3 Re5xe1+ 29.Qh4xe1 Ba2-c4 30.Qe1-e3 Nd7-f8 31.Nf3-d4 f5-f4
=/+ (-0.37) Depth: 10 00:00:05 206kN
26...Bc4xa2 27.f2-f3 e4xf3 28.Nd4xf3 Re5xe1+ 29.Qh4xe1 Ba2-c4 30.Qe1-e3 Nd7-f8 31.Nf3-d4 f5-f4
=/+ (-0.37) Depth: 11 00:00:06 245kN
26...Bc4xa2 27.f2-f3 g7-g5 28.Qh4-f2 Ba2-d5 29.f3-f4 g5xf4 30.Qf2xf4 Bd5-c4 31.Kh1-g1 Re5-c5
= (-0.16) Depth: 12 00:00:21 936kN
26...Bc4xa2 27.f2-f3 g7-g5 28.Qh4-f2 Ba2-d5 29.f3-f4 g5xf4 30.Qf2xf4 Bd5-c4 31.Re1-e3 Re5-c5 32.Qf4-f2 a6-a5
= (-0.12) Depth: 13 00:00:31 1371kN
26...Bc4xa2 27.f2-f3 g7-g5 28.Qh4-f2 Ba2-d5 29.f3-f4 g5xf4 30.Qf2xf4 Bd5-c4 31.Re1-e3 Re5-c5 32.Qf4-f2 Bc4-f7
= (-0.12) Depth: 14 00:00:49 2182kN
26...Bc4xa2 27.f2-f3 g7-g5 28.Qh4-h3 Ba2-d5 29.f3xe4 Bd5xe4 30.Bc2xe4 f5xe4 31.Re1-f1 e4-e3 32.Rd1-e1 Rf6-f2 33.Qh3xh6 Qc7-b6 34.Qh6-h3 Qb6-f6 35.Nd4-f3
= (-0.07) Depth: 15 00:02:48 8252kN
26...b7-b5 27.f2-f3 Nd7-c5
= (-0.14) Depth: 15 00:05:56 19161kN
26...Nd7-c5 27.Qh4-f4 Re5-e7 28.Qf4xc7 Re7xc7 29.f2-f3 Bc4-d3 30.Rd1-d2 Bd3xc2 31.Rd2xc2 Rc7-e7 32.g2-g3 Nc5-d3 33.Re1-d1 e4xf3
= (-0.20) Depth: 15 00:05:56 19162kN
26...Nd7-c5 27.Qh4-f4 Re5-e7 28.Qf4xc7 Re7xc7 29.Kh1-g1 Bc4-d3 30.Bc2-b3+ Kg8-h7 31.Rd1-d2 b7-b5 32.f2-f3 Rc7-e7 33.Kg1-f2 Re7-d7 34.Re1-d1
= (-0.23) Depth: 16 00:07:00 23289kN
26...Nd7-c5 27.Qh4-f4 Re5-e7 28.Qf4xc7 Re7xc7 29.Kh1-g1 Bc4-d3 30.Bc2-b3+ Kg8-h7 31.Rd1-d2 b7-b5 32.f2-f3 Rc7-e7 33.Kg1-f2 Re7-d7 34.Re1-d1
= (-0.22) Depth: 17 00:09:01 30590kN
26...Nd7-c5 27.Qh4-f4 Re5-e7 28.Qf4xc7 Re7xc7 29.Kh1-g1 Bc4-d3 30.Bc2-b3+ Kg8-h7 31.Rd1-d2 b7-b5 32.f2-f3 Rc7-e7 33.Kg1-f2 Re7-d7 34.Re1-d1 f5-f4
= (-0.20) Depth: 18 00:12:03 41126kN
26...Nd7-c5 27.Qh4-f4 Re5-e7 28.Qf4xc7 Re7xc7 29.Kh1-g1 Bc4-d3 30.Bc2-b3+ Kg8-h7 31.Rd1-d2 b7-b5 32.Bb3-d1 g7-g6 33.f2-f3 Kh7-g7 34.Bd1-e2 Bd3xe2 35.Re1xe2 Rc7-e7 36.Nd4-c2
= (-0.20) Depth: 19 00:30:48 104mN
26...Bc4xa2 27.f2-f3 e4xf3
=/+ (-0.30) Depth: 19 00:57:49 204mN
26...Bc4xa2 27.f2-f3 g7-g5 28.Qh4-h3 Ba2-d5 29.f3xe4 Bd5xe4 30.Bc2xe4 f5xe4 31.Re1-f1 Kg8-h7 32.Nd4-f3 Re5-e7
= (-0.21) Depth: 20 02:22:13 503mN
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.h2-h3 Nd7-c5 30.Qh4-g3 Qc7-e7 31.Nd4-f3 Re5-d5 32.Nf3-d4 Bf7-h5 33.Rd1-d2 Rd5-g5 34.Qg3-e3 Rg5-e5 35.b2-b4 Nc5-d7 36.Nd4-e2
= (-0.21) Depth: 21 06:57:31 1474mN
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.h2-h3 Nd7-c5 30.Qh4-g3 Qc7-e7 31.Nd4-f3 Re5-d5 32.Nf3-d4 Bf7-h5 33.Rd1-d2 Rd5-g5 34.Qg3-e3 Rg5-e5 35.b2-b4 Nc5-d7 36.Nd4-e2
= (-0.21) Depth: 22 07:59:54 1727mN
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.h2-h3 Nd7-c5 30.Qh4-g3 Qc7-e7 31.Nd4-f3 Re5-d5 32.Nf3-d4 Bf7-h5 33.Rd1-d2 Rd5-g5 34.Qg3-e3 Rg5-e5 35.b2-b4 Nc5-d7 36.Nd4-e2
= (-0.21) Depth: 23 10:31:23 2310mN
26...Bc4xa2 27.f2-f3 Ba2-f7 28.f3xe4 f5xe4 29.h2-h3 Nd7-c5 30.Qh4-g3 Qc7-e7 31.Nd4-f3 Re5-d5 32.Nf3-d4 Bf7-h5 33.Rd1-d2 Rd5-g5 34.Qg3-e3 Rg5-e5 35.b2-b4 Nc5-d7 36.Nd4-e2
= (-0.21) Depth: 24 15:38:40 3623mN
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User avatar
Eelco de Groot
Posts: 4653
Joined: Sun Mar 12, 2006 2:40 am
Full name:   Eelco de Groot

Re: Test position

Post by Eelco de Groot »

Yar are you sure the two moves are not about equal? I also could not not find much difference between the evaluations but this version of Ancalagon still has bugs. I have not tried other programs.

Regards, Eelco

Two best

6k1/1pqn2p1/p4r1p/4rp2/2bNp2Q/2P5/PPB2PPP/3RR2K b - -

Engine: Ancalagon 1.3 Weak Squares 180 Board Control middlegame 50 endgame 50
Build 382 (Athlon 2009 MHz, 128 MB) by Romstad, Costalba, Kiiski, de Groot

7 4:40 +0.13 26...Bxa2 27.f3 exf3 28.Nxf3 Rxe1+
29.Qxe1 Be6 30.Nd4 Nf8 31.Qe3 Kh7
32.Nf3 Bf7 33.Ne5 Kg8 34.Nxf7 Qxf7
35.Kg1 Re6 (107.992.480) 384

7 4:40 +0.07 26...Nc5 27.Kg1 Bxa2 28.b3 Rb6
29.Qh3 Bxb3 (107.992.480) 384
_________________________________________________________________

8 10:41 +0.22 26...Bxa2 27.f3 exf3 28.Nxf3 Rxe1+
29.Qxe1 Be6 30.Nd4 Nf8 31.Kg1 Qb6
32.b3 Kh7 33.Qh4 Bd7 34.Rf1 Kg8
35.b4 Ng6 36.Bb3+ Be6 (260.344.636) 405

8 10:41 +0.10 26...Nc5 27.Qf4 Ne6 28.Nxe6 Bxe6
29.Bb3 Bxb3 30.axb3 Rc5 31.Qxc7 Rxc7
32.Kg1 Kf7 33.Rd8 g5 (260.344.636) 405
_________________________________________________________________

9 24:57 +0.31 26...Bxa2 27.f3 Bf7 28.fxe4 fxe4
29.Qg3 Nc5 30.Nf3 Re7 31.Qxc7 Rxc7
32.Rd8+ Kh7 33.Kg1 g6 34.Bxe4 Rb6
35.Rd2 Re6 36.Bc2 Rxe1+ 37.Nxe1 Kg7
38.Nf3 Re7 (608.817.265) 406

9 24:57 +0.13 26...Nc5 27.Qg3 Bd3 28.Bb3+ Nxb3
29.axb3 Rc5 30.Qxc7 Rxc7 31.Kg1 g6
32.f3 Kg7 33.Kf2 Rd6 34.fxe4 Bxe4 (608.817.265) 406
_________________________________________________________________

10 63:09 +0.37 26...Bxa2 27.f3 Bf7 28.fxe4 fxe4
29.Qg3 Nc5 30.Nf3 Re7 31.Qxc7 Rxc7
32.Rd8+ Kh7 33.Kg1 Re6 34.Nd2 a5
35.Rd4 Rce7 36.b4 axb4 37.cxb4 Nd3
38.Rexe4 Rxe4 39.Nxe4 (1.529.092.993) 403

10 63:09 +0.18 26...Nc5 27.Kg1 Bd3 28.Bb3+ Nxb3
29.axb3 Rd5 30.Nc2 Qf7 31.Nd4 Rfd6
32.Qh3 Rd8 33.b4 Rxd4 34.cxd4 Rxd4 (1.529.092.993) 403
_________________________________________________________________

11 139:36 +0.36 26...Bxa2 27.f3 Bf7 28.fxe4 fxe4
29.Qg3 Nc5 30.Nf3 Re7 31.Qxc7 Rxc7
32.Rd8+ Kh7 33.Bxe4+ Nxe4 34.Rxe4 Bh5
35.Nd2 Rff7 36.Red4 Bg6 37.g4 Rf2
38.Kg1 Rcf7 39.b3 (3.108.352.460) 371

11 139:36 +0.18 26...Nc5 27.f3 Bd3 28.Qf2 Rg6 29.g3 Rf6
30.Re3 Rf7 31.Bxd3 Nxd3 32.Qg2 exf3
33.Rxf3 (3.108.352.460) 371


I am making a Stockfish 1.5 clone mainly to do more checking and to try something new. Need a reference for debugging of Ancalagon. Just installed the new project but at the moment I can't let it analyze this until later. New clone is called "Rainbow Serpent 1.5" 8-) But the changes will be minimal for the moment, I just changed two lines and tried to make a compile.

Eelco

Image
Debugging is twice as hard as writing the code in the first
place. Therefore, if you write the code as cleverly as possible, you
are, by definition, not smart enough to debug it.
-- Brian W. Kernighan
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ernst
Posts: 354
Joined: Thu Mar 09, 2006 6:00 pm

Re: Test position

Post by ernst »

Deep Shredder 12 finds Nc5 in 11 seconds here.

Engine: Deep Shredder 12 x64 (1024 MB)
by Stefan Meyer-Kahlen

13/29 0:00 -0.45 1...Bxa2 2.f3 g5 3.Qg3 exf3 4.Nxf3 f4
5.Qh3 Be6 6.Qh5 Bf7 7.Qh3 Rxe1+
8.Rxe1 Nb6 9.Ne5 Nc4 (2.073.915) 2463

14/35 0:02 -0.44 1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+
4.Qxe1 Nc5 5.Qe8+ Rf8 6.Qg6 Qf7
7.Qxf7+ Rxf7 8.Rd8+ Kh7 9.Ne5 Rf6
10.Kg1 Ne4 11.Rd7 (6.421.278) 2464

15/35 0:04 -0.09 1...Bxa2 2.f3 exf3 3.Nxf3 Rxe1+
4.Qxe1 Nc5 5.Qe8+ Rf8 6.Qg6 Qf7
7.Qxf7+ Kxf7 8.Bxf5 Re8 9.Nd4 g6
10.Bc2 Bc4 11.Kg1 (11.420.433) 2473

15/42 0:11 -0.24 1...Nc5 2.f3 Bd3 3.Bb3+ Kh8 4.Qh3 exf3
5.Qxf3 Rxe1+ 6.Rxe1 Be4 7.Qh5 Qe5
8.Nf3 Qe7 (27.088.055) 2442

16/44 0:37 -0.19 1...Nc5 2.Qf4 g5 3.Qd2 Re7 4.f3 Bd3
5.b4 Bxc2 6.Qxc2 Nd3 7.Rf1 Qe5 8.Qe2 b5 (89.857.317) 2425

17/41 0:54 -0.21 1...Nc5 2.Qf4 g5 3.Qd2 Re7 4.f3 Bd3
5.Bxd3 Nxd3 6.Re3 Qf4 7.b3 Qe5 8.Qe2 exf3
9.Rxf3 Qxe2 10.Nxe2 Rxe2 11.Rfxd3 Rxa2
12.Rd8+ Kg7 (133.335.079) 2428

18/40 1:11 -0.20 1...Nc5 2.Qf4 g5 3.Qd2 Re7 4.f3 Bd3
5.Bxd3 Nxd3 6.Re3 Re8 7.Qe2 Rff8
8.Kg1 Qf7 9.b3 Kg7 10.a4 Qd5 11.Rf1 Nf4
12.Qd2 Nd3 13.fxe4 fxe4 (175.017.272) 2437

19/50 3:33 -0.30 1...Nc5 2.Qf4 Kh7 3.h4 Bd3 4.Bb3 Re7
5.Qxc7 Rxc7 6.Rd2 Kg6 7.Kg1 Rd7 8.g3 a5
9.f3 f4 10.fxe4 Bxe4 11.g4 f3 12.Ba4 Rd8
13.Bc2 Rf4 (537.406.728) 2516

best move: Nd7-c5 time: 4:15.858 min n/s: 2.521.594 CPU 399.5% n/s(1CPU): 631.187 nodes: 645.089.473
Last edited by ernst on Tue Nov 03, 2009 7:49 pm, edited 1 time in total.
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yanquis1972
Posts: 1766
Joined: Wed Jun 03, 2009 12:14 am

Re: Test position

Post by yanquis1972 »

after some quick forward analysis (3 moves) i got -.34 for Bxa2 and -.24 for Nc5, are we sure Nc5 is better? i think both might be better for black w/out a clearcut favorite.
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Yar
Posts: 298
Joined: Wed Mar 08, 2006 9:00 pm
Location: Moscow, Russia

Re: Test position

Post by Yar »

yanquis1972 wrote:after some quick forward analysis (3 moves) i got -.34 for Bxa2 and -.24 for Nc5, are we sure Nc5 is better? i think both might be better for black w/out a clearcut favorite.
Bxa2 would be probably a draw.
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Martin Brown
Posts: 46
Joined: Sun Oct 18, 2009 12:07 pm

Re: Test position

Post by Martin Brown »

Shredder 10 on a Q6600 2.4Ghz took about 6 mins and ply 15 search to first see that Nc5 was the better line. But then changed its mind again at ply 16 & 12mins. Ply 17 & 26 mins sees Nc5 and b5 better than Bxa2 and ply 18 & 50 mins gets the same result.

BTW How do you guys cut & paste from the analysis window. It doesn't work for me here with Chessbase GUI at all!
Martin Brown
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