Testposition

Eelco de Groot · Post by **Eelco de Groot** » Sat Jan 02, 2010 12:42 pm

With 38... Kh8{?} I think Black is losing the draw instantly, but I could not see any big score running Stockfish or Rybka on the position. Is there any engine that sees it or did Black miss something? In the game the eval quickly went down. The threat against the outposted Knight on e6 by Rd6! threatening d5! is crushing

[d]7k/pb3p2/1p2n2p/3R2pN/P2P2P1/1P3P2/2r4P/4B1K1 w - -

How long for a plusscore on this position?

But this was the first testgame where Stockfish 1.6.3s was playing fairly well and could have drawn! Also a big thanks to the Rybka team for making Rybka 2.3.2a 32-bit single procesor available!

[Event "6 Minutes/Game + 6 Seconds/Move"]
[Site "Engine Match"]
[Date "2010.01.02"]
[Round "1"]
[White "Rybka 2.3.2a 32-bit"]
[Black "Stockfish 1.6.3s(dc)"]
[Result "1-0"]
[ECO "E42 - Nimzo-Indian/Hübnner Variation"]

1. d4 {book 0s} Nf6 {book 0s} 2. c4 {book 0s} e6 {book 0s}
3. Nc3 {book 0s} Bb4 {book 0s} 4. e3 {book 0s} c5 {book 0s}
5. Nge2 {book 0s} b6 {book 0s} 6. a3 {book 0s} Ba5 {book
0s} 7. Bd2 {book 0s} O-O {book 0s} 8. Ng3 {book 0s} Bb7
{book 0s} 9. Rb1 {book 0s} cxd4 {book 0s} 10. exd4 {book
0s} Bxc3 {book 0s} 11. Bxc3 {book 0s} d5 {+0.40/15 20s}
12. Rc1 {-0.30/12 17s (c5)} Nbd7 {+0.84/15 22s (Nc6)}
13. f3 {-0.26/13 17s (b3)} Re8 {+0.64/16 24s (h5)} 14. Bd3
{-0.09/13 25s (b3)} dxc4 {+0.40/15 13s (Rc8)} 15. Bxc4
{-0.08/13 10s} Nd5 {+0.36/16 18s} 16. Bxd5 {-0.08/14 21s
(Qd2)} exd5+ {+0.28/15 11s (Bxd5)} 17. Kf2 {+0.02/10 0s}
Nf8 {+0.12/18 1:20m (Rc8)} 18. Re1 {-0.03/13 18s} g6
{+0.12/17 11s (Ne6)} 19. Rxe8 {-0.04/13 16s} Qxe8 {+0.12/14
1s} 20. Qe1 {-0.02/14 26s (f4)} Ne6 {+0.24/16 22s} 21. Qe5
{-0.01/13 6s} Qf8 {+0.20/16 10s} 22. Re1 {-0.01/14 20s
(Bd2)} Re8 {+0.12/16 9s} 23. Qf6 {0.00/14 15s} Qg7
{+0.12/17 11s (Bc6)} 24. Qf4 {0.00/14 22s (Qxg7+)} h6
{0.00/16 24s (Qf8)} 25. Qd2 {0.00/14 21s (Qd6)} Bc6
{0.00/15 14s} 26. Kg1 {0.00/13 3s} Qh7 {0.00/17 18s (Kh7)}
27. b3 {0.00/13 23s (Qd3)} g5 {0.00/18 12s (Qg7)} 28. Nh5
{0.00/14 10s} Qg6 {0.00/18 12s} 29. g4 {0.00/15 6s} Bb5
{0.00/18 12s (Ng7)} 30. a4 {+0.09/13 11s} Ba6 {0.00/18 12s
(Bc6)} 31. Re5 {+0.22/12 23s} Qb1+ {0.00/18 11s (Rc8)}
32. Qe1 {+0.01/15 8s (Re1)} Qxe1+ {0.00/17 11s} 33. Bxe1
{0.00/16 5s} Rc8 {0.00/17 9s (Rd8)} 34. Rxd5 {0.00/13 4s}
Rc1 {0.00/16 11s} 35. Kf2 {0.00/14 2s} Rc2+ {0.00/17 7s}
36. Kg1 {0.00/17 9s (Kg3)} Bb7 {0.00/16 10s} 37. Nf6+
{0.00/17 6s} Kg7 {0.00/20 10s} 38. Nh5+ {0.00/17 2s} Kh8
{0.00/19 10s (Kg8)} 39. Rd6 {+0.44/15 23s (Rd7)} Bxf3
{0.00/18 10s} 40. Bg3 {+0.48/15 8s} Rg2+ {-0.36/15 29s
(Kh7)} 41. Kf1 {+0.48/13 3s} Kh7 {-0.24/17 19s} 42. Be5
{+0.59/12 2s (Nf6+)} Re2 {-0.80/14 6s (Rc2)} 43. Nf6+
{+0.99/13 7s} Kg6 {-0.92/17 20s} 44. h3 {+1.10/13 3s (Nd7)}
Re3 {-1.21/15 9s} 45. b4 {+1.15/13 5s (Nd7)} Rb3 {-1.33/14
16s} 46. b5 {+0.93/13 14s (Kf2)} Rb4 {-1.33/14 13s (Rd3)}
47. Kg1 {+1.56/14 21s (d5)} Rc4 {-2.54/14 12s (Rb3)} 48. d5
{+1.80/12 3s} Nc5 {-3.23/16 14s (Nf4)} 49. Rd8 {+2.47/10
0s} h5 {-3.03/14 7s} 50. Rg8+ {+2.97/12 1s} Kh6 {-2.54/6
0s} 51. h4 {+3.28/13 2s (gxh5)} Rxg4+ {-3.59/14 5s}
52. Nxg4+ {+3.01/12 0s} hxg4 {-4.36/15 5s} 53. hxg5+
{+3.93/14 1s} Kh5 {-4.40/12 0s} 54. d6 {+3.85/15 2s} g3
{-4.80/18 14s (Bd5)} 55. Bd4 {+5.16/15 3s} Nd7 {-5.21/19
13s} 56. Rg7 {+4.61/12 0s} Bd5 {-6.54/19 10s} 57. g6
{+5.90/12 6s} Kg5 {-7.03/19 10s} 58. gxf7+ {+6.58/11 2s}
Kf4 {-8.52/21 9s (Kf5)} 59. Bf6 {+6.69/9 3s (f8N)} Kf5
{-9.13/16 4s (Bb3)} 60. Be7 {+6.73/8 3s} Bxf7 {-10.90/21 8s
(Bb3)} 61. Rxf7+ {+7.35/13 2s} Ke6 {-12.60/20 7s} 62. Rf4
{+7.50/14 6s (Rg7)} Nc5 {-12.56/19 5s} 63. Kg2 {+7.56/12 3s
(Rc4)} a5 {-12.72/19 5s (Kd5)} 64. Rc4 {+8.84/13 11s
(bxa6)} Nd7 {-20.32/21 7s (Nd3)} 65. Kxg3 {+9.27/15 5s} Kf7
{-85.43/20 6s (Ne5)} 66. Kf4 {+10.62/15 4s (Rc6)} Ke6
{-59.31/20 7s} 67. Rc6 {+11.42/14 13s (Rc3)} Kd5 {-87.05/17
6s (Ne5)} 68. Kf5 {+16.16/15 21s (Rc7)} Kd4 {-65.77/16 6s
(Ne5)} 69. Ke6 {+21.62/9 8s} Nb8 {-113.76/16 4s} 70. Bf6+
{+22.73/10 20s (Rxb6)} Ke4 {-M9/15 4s} 71. Rxb6 {+23.66/11
15s (Rc8)} Nd7 {-M9/16 6s} 72. Kxd7 {+22.75/8 3s} Kd5
{-M8/11 0s} 73. Kc7 {+M13/11 13s (Rc6)} Ke4 {-M7/11 0s}
74. d7 {+32.23/8 1s} Kf4 {-M6/8 0s (Kf3)} 75. d8=Q {+M8/4
0s} Ke4 {-M5/7 0s (Kf3)} 76. Qd4+ {+M5/5 0s} Kf3 {-M4/6 0s}
77. Rc6 {+M4/3 0s (Re6)} Ke2 {-M3/6 0s (Kg3)} 78. Rc2+
{+M3/3 0s} Kf3 {-M2/6 0s} 79. Rf2+ {+M2/3 0s} Kg3 {-M1/6
0s} 80. Qh4# {+M1/3 0s} 1-0

meschle · Post by **meschle** » Sat Jan 02, 2010 1:31 pm

sPARK 0.3

FEN: 7k/pb3p2/1p2n2p/3R2pN/P2P2P1/1P3P2/2r4P/4B1K1 w - - 0 1

Spark-0.3-gcc64:
1 00:00 5 0 -6.28 h2h4 Bb7xd5
1 00:00 21 0 -3.18 Nh5f6 Bb7xd5 Nf6xd5 Ne6xd4
1 00:00 33 0 -1.69 Rd5b5 Ne6xd4
1 00:00 44 0 -1.04 Rd5e5 Ne6xd4 Re5e8+ Kh8h7 Nh5f6+ Kh7g6
1 00:00 95 0 -1.00 Rd5d6 Bb7xf3
1 00:00 107 0 -0.28 Rd5d7 Bb7xf3
2/1 00:00 180 0 -0.28 Rd5d7 Bb7xf3
3/2 00:00 443 0 -0.01 Rd5d7 Bb7xf3 Nh5f6
4/3 00:00 1.217 0 -0.11 Rd5d7 Bb7xf3 Nh5f6 Kh8g7
5/6 00:00 3.419 0 -0.33 Rd5d7 Bb7xf3 h2h3 Bf3c6 Rd7xf7 Ne6xd4
6/6 00:00 6.377 0 -0.08 Rd5d7
6/6 00:00 7.184 0 0.00 Rd5d7 Bb7xf3 Rd7xf7 Bf3xg4 Nh5f6 Bg4f5
7/9 00:00 13.440 0 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Nh5f6 Nd4xf3+ Kg1f1 Nf3xh2+ Kf1g1 Rc2g2+ Kg1h1 Rg2c2+ Kh1g1
8/13 00:00 26.506 0 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Nh5f6 Nd4xf3+ Kg1f1 Nf3xh2+ Kf1g1 Rc2g2+ Kg1h1 Rg2c2+ Kh1g1
9/15 00:00 45.973 0 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Nh5f6 Nd4xf3+ Kg1f1 Nf3xh2+ Kf1g1 Rc2g2+ Kg1h1 Rg2c2+ Kh1g1
10/17 00:00 88.303 0 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
11/17 00:00 143.573 0 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
12/18 00:00 252.337 1.617.544 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
13/22 00:00 497.786 1.771.480 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
14/24 00:00 850.246 1.760.343 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
15/26 00:00 1.353.752 1.807.412 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
16/30 00:02 4.125.451 1.751.783 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
17/32 00:03 6.515.676 1.792.483 0.00 Rd5d7 Bb7c6 Rd7xf7 Ne6xd4 Be1c3 Rc2c1+ Kg1g2 Rc1c2+ Kg2g1
17/36 00:09 17.845.579 1.795.871 +0.25 Rd5d6
17/36 00:11 20.183.733 1.817.208 +0.35 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 Rd6d7 Bd1xb3 Ne5xf7 Bb3xa4 Rd7xa7 Rc1c2+ Kf2e3 Rc2c3+ Ke3e4 Ba4c2+ Ke4d5 Bc2b3+ Kd5e5
18/36 00:15 27.405.937 1.826.210 +0.35 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 Rd6d7 Bd1xb3 Ne5xf7 Bb3xa4 Rd7xa7 Rc1c2+ Kf2e3 Rc2c3+ Ke3e4 Ba4c2+ Ke4d5 Bc2b3+ Kd5e5
19/45 00:23 42.695.617 1.848.055 +0.38 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 b3b4 Bd1xa4 d4d5 Rc1c2+ Kf2e3 Rc2c3+ Ke3d2 Rc3c2+ Kd2d3 Ne6f4+ Bg3xf4 g5xf4 Rd6f6
20/45 00:45 83.793.833 1.833.884 +0.63 Rd5d6
20/45 00:47 85.935.691 1.827.097 +0.49 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 b3b4 Bd1xa4 d4d5 Rc1c2+ Kf2e3 Ne6f4 Bg3xf4 g5xf4+ Ke3xf4 Rc2xh2 Ne5c6 Rh2f2+ Kf4e5 Rf2e2+ Ke5f6
21/50 01:13 132.409.240 1.809.363 +0.50 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 b3b4 Bd1xa4 d4d5 Rc1c2+ Kf2e3 Ne6f4 Bg3xf4 g5xf4+ Ke3xf4 Rc2xh2 Ne5c6 a7a6 Rd6d7 Kh7g7
22/50 02:40 289.140.786 1.803.500 +0.75 Rd5d6
22/50 02:56 314.378.504 1.783.707 +0.71 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Nd7e5 Rc2c1+ Kg1f2 Bf3d1 b3b4 Bd1xa4 d4d5 Rc1c2+ Kf2e3 Ne6c7 Ne5xf7 Kh7g7 Nf7e5 Ba4b5 Ne5f3 Rc2e2+ Ke3d4 Bb5a4 Bg3e5+ Kg7h7
23/50 05:19 562.062.618 1.761.830 +0.79 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Bg3e5 Rc2e2 b3b4 Re2g2+ Kg1f1 Rg2e2 d4d5 Ne6f4 Nd7f6+ Kh7g7 Nf6h5+ Kg7h7 Be5xf4 g5xf4 Rd6f6 Bf3xg4 Rf6xf7+ Kh7g6 Nh5xf4+ Kg6xf7 Nf4xe2 Bg4f3
24/50 09:26 996.401.292 1.759.689 +0.81 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Bg3e5 Rc2g2+ Kg1f1 Rg2c2 Nd7f6+ Kh7g7 b3b4 Ne6f4 Nf6d5+ Kg7h7 Nd5xf4 g5xf4 Rd6d7 Bf3xg4 Rd7xf7+ Kh7g6 Rf7f6+ Kg6g5 Rf6xf4 Bg4h3+ Kf1g1 Rc2a2 Rf4f3 Bh3g4 Be5f4+ Kg5f6

zullil · Post by **zullil** » Sat Jan 02, 2010 1:42 pm

Stockfish-1.6.2-MSD7 (8 threads)

Code: Select all

Searching: 7k/pb3p2/1p2n2p/3R2pN/P2P2P1/1P3P2/2r4P/4B1K1 w - -
infinite: 0 ponder: 0 time: 0 increment: 0 moves to go: 0
 2     -0.40   00:00      210 Rd7 Bxf3 
 3     +0.28   00:00      502 Rd7 Bxf3 d5 
 4     -0.44   00:00     1161 Rd7 Bxf3 d5 Nc5 
 5     -0.40   00:00     2885 Rd7 Bxf3 Rxf7 Nxd4 h3 
 6     -0.44   00:00     6423 Rd7 Bxf3 h3 Kg8 d5 Nc5 Rd8+ Kh7 
 7  >  -0.24   00:00    10298 Rd7 Bxf3 h3 Kg8 Bf2 a6 Be3 
 8     -0.36   00:00    36185 Rd7 Bc6 Rxf7 Nxd4 Rf8+ Kh7 Rf7+ Kg8 Rg7+ Kh8 f4 
                              Nf3+ Kf1 Nxh2+ Kg1 Nxg4 fxg5 hxg5 Rxa7 
 9     +0.00   00:00   268105 Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
10     +0.00   00:00   320165 Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
11     +0.00   00:00   461273 Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
12     +0.00   00:00   551479 Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
13     +0.00   00:01    1461k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
14     +0.00   00:01    1700k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
15     +0.00   00:01    2255k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
16     +0.00   00:01    4294k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
17     +0.00   00:01    6462k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
18     +0.00   00:03   19687k Rd7 Bc6 Rxf7 Nxd4 Bg3 Nxf3+ Kf1 Be4 Rd7 Bg6 Rd8+ 
                              Kh7 Rd7+ Kh8 
18     +0.16   00:04   29350k Rd6 Bxf3 Bg3 Kh7 Be5 Re2 Kf1 Kg6 Nf6 Kg7 Nd7+ Kh7 
                              d5 Nc5 Nf6+ Kg7 Nh5+ Kh7 Bg7 f5 Rxh6+ Kg8 Rh8+ 
                              Kf7 Rf8+ Kg6 Rxf5 Bxg4 
19     +0.20   00:07   44227k Rd6 Bxf3 Bg3 Kh7 Be5 Re2 Kf1 Rc2 Nf6+ Kg7 Rd7 Kg6 
                              Rxa7 Nf4 Bxf4 gxf4 Nh5 Rxh2 Nxf4+ Kf6 Ra6 Kg5 
20  >  +0.44   00:17  109240k Rd6 Kg8 Bg3 Rc1+ Kf2 Rc2+ Ke3 Rc3+ Kd2 Rxb3 d5 
                              Rb2+ Kc3 
21     +0.65   01:00  350425k Rd6 Kg8 Bg3 Bxf3 Be5 Kh7 h3 Re2 Nf6+ Kg7 Rd7 a5 
                              Rd6 Bg2 Rxb6 Bxh3 Nd7+ Kh7 d5 Nf4 Nf6+ Kg6 Nh5+ 
                              Ne6 
22     +0.48   03:06    1054M Rd6 Kh7 Rd7 Rc7 Rxc7 Nxc7 Kf2 Kg6 Ng3 Bd5 b4 Bc6 
                              a5 Nd5 Ne4 bxa5 bxa5 f5 Nd6 fxg4 fxg4 Nf6 Kg3 
                              Ne4+ Nxe4 Bxe4 Bb4 Kf6 
23     +0.53   03:56    1328M Rd6 Kh7 Rd7 Rc7 Rxc7 Nxc7 Kf2 Kg6 Ng3 Bd5 b4 Be6 
                              Bd2 Bd7 b5 Be6 Ne4 Bb3 Nc3 f5 f4 fxg4 fxg5 hxg5 
24     +0.44   06:23    2157M Rd6 Bxf3 Bg3 Kh7 Be5 Nf4 Nxf4 gxf4 h3 Rg2+ Kf1 h5 
                              gxh5 Rg3 Rf6 Bd5 Bb8 Rxh3 Bxa7 Rh1+ Ke2 Rh2+ Kd3 
                              Rh3+ Kd2 Rh2+ Kc3 Rh3+ Kb2 Rh2+ Ka3 f3 Bxb6 Rxh5 
25     +0.40   18:06    6057M Rd6 Bxf3 Bg3 Kh7 Be5 Nf4 Nxf4 gxf4 h3 Rg2+ Kf1 h5 
                              gxh5 Rg3 Rf6 Bd5 b4 Rxh3 Bxf4 Rxh5 Kf2 Rh3 Rd6 
                              Be6 d5 Bg4 Rf6 Rf3+ Kg2 Kg7 Rf5 Bxf5 Kxf3 Kf6 Ke3 
                              a5 bxa5 bxa5 
Nodes: 6394419015
Nodes/second: 5572633
Best move: Rd6
Ponder move: Bxf3

zullil · Post by **zullil** » Sat Jan 02, 2010 2:11 pm

RobboLito_0085g3l_x86 to depth 20:

Code: Select all

info depth 20 seldepth 61 score cp 64  time 70051 nodes 114735048 nps 1637000 pv d5d6 b7f3 e1g3 h8h7 g3e5 h7g6 d4d5 c2g2 g1f1 f3d5 d6d5 g2g4 h5g3 g4b4 d5d3 f7f6 e5d6 b4d4 d3d4 e6d4 b3b4 f6f5 f1f2 f5f4 g3e2 d4e2 f2e2 g6f5 e2f3 g5g4 f3f2 f5e4 b4b5 h6h5
bestmove d5d6 ponder b7f3

mcostalba · Post by **mcostalba** » Sat Jan 02, 2010 3:04 pm

Eelco de Groot wrote: But this was the first testgame where Stockfish 1.6.3s was playing fairly well

Hi Eelco,

sorry but what is 1.6.3s ?

Thanks
Marco

meschle · Post by **meschle** » Sat Jan 02, 2010 4:01 pm

On leaving spark 0.3 running a bit longer the score is gradually dropping

24/50 09:43 996.401.292 1.709.072 +0.81 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Bg3e5 Rc2g2+ Kg1f1 Rg2c2 Nd7f6+ Kh7g7 b3b4 Ne6f4 Nf6d5+ Kg7h7 Nd5xf4 g5xf4 Rd6d7 Bf3xg4 Rd7xf7+ Kh7g6 Rf7f6+ Kg6g5 Rf6xf4 Bg4h3+ Kf1g1 Rc2a2 Rf4f3 Bh3g4 Be5f4+ Kg5f6
25/60 22:01 2.226.471,951 1.685.168 +0.78 Rd5d6 Bb7xf3 Be1g3 Rc2e2 Nh5f6 Kh8g7 Bg3e5 Ne6f4 Nf6h5+ Kg7f8 Nh5xf4 g5xf4 h2h3 h6h5 g4xh5 Bf3xh5 Be5xf4 Re2b2 Rd6d7 Rb2xb3 Rd7xa7 Rb3xh3 Bf4c7 Rh3b3 Ra7b7 Bh5f3 Rb7b8+ Kf8e7 Bc7xb6
26/60 38:46 3.905.569,789 1.678.434 +0.63 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Bg3e5 Rc2c1+ Kg1f2 Bf3d1 Nh5f6+ Kh7g6 b3b4 Rc1c2+ Kf2g1 Rc2c1 d4d5 Ne6f4 Nf6h5+ Kg6h7 Nh5xf4 g5xf4 Rd6xh6+ Kh7xh6 Be5xf4+ Kh6g6 Bf4xc1 Bd1xg4 Kg1f2 Kg6f5 Bc1b2 Bg4d1 a4a5 b6xa5 b4xa5 Kf5e4
27/69 1:05:20 6.662.448,068 1.699.289 +0.59 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Bg3e5 Ne6f4 Nh5xf4 g5xf4 h2h3 h6h5 Rd6d7 h5xg4 Rd7xf7+ Kh7g6 Rf7xf4 Rc2c1+ Kg1f2 Bf3d1 Rf4f6+ Kg6g5 Rf6f8 Rc1b1 Rf8g8+ Kg5f5 h3xg4+ Kf5e4 Rg8g7 Rb1xb3 Rg7xa7 Bd1xg4 Ra7b7 Rb3f3+ Kf2g2 Bg4h3+ Kg2h2

I am not convinced that it is a winning move - a number of engines initially have a small + score and then it appears to drop.

Eelco de Groot · Post by **Eelco de Groot** » Sat Jan 02, 2010 4:40 pm

meschle wrote:On leaving spark 0.3 running a bit longer the score is gradually dropping

24/50 09:43 996.401.292 1.709.072 +0.81 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Nh5f6+ Kh7g6 Nf6d7 Kg6h7 Bg3e5 Rc2g2+ Kg1f1 Rg2c2 Nd7f6+ Kh7g7 b3b4 Ne6f4 Nf6d5+ Kg7h7 Nd5xf4 g5xf4 Rd6d7 Bf3xg4 Rd7xf7+ Kh7g6 Rf7f6+ Kg6g5 Rf6xf4 Bg4h3+ Kf1g1 Rc2a2 Rf4f3 Bh3g4 Be5f4+ Kg5f6
25/60 22:01 2.226.471,951 1.685.168 +0.78 Rd5d6 Bb7xf3 Be1g3 Rc2e2 Nh5f6 Kh8g7 Bg3e5 Ne6f4 Nf6h5+ Kg7f8 Nh5xf4 g5xf4 h2h3 h6h5 g4xh5 Bf3xh5 Be5xf4 Re2b2 Rd6d7 Rb2xb3 Rd7xa7 Rb3xh3 Bf4c7 Rh3b3 Ra7b7 Bh5f3 Rb7b8+ Kf8e7 Bc7xb6
26/60 38:46 3.905.569,789 1.678.434 +0.63 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Bg3e5 Rc2c1+ Kg1f2 Bf3d1 Nh5f6+ Kh7g6 b3b4 Rc1c2+ Kf2g1 Rc2c1 d4d5 Ne6f4 Nf6h5+ Kg6h7 Nh5xf4 g5xf4 Rd6xh6+ Kh7xh6 Be5xf4+ Kh6g6 Bf4xc1 Bd1xg4 Kg1f2 Kg6f5 Bc1b2 Bg4d1 a4a5 b6xa5 b4xa5 Kf5e4
27/69 1:05:20 6.662.448,068 1.699.289 +0.59 Rd5d6 Bb7xf3 Be1g3 Kh8h7 Bg3e5 Ne6f4 Nh5xf4 g5xf4 h2h3 h6h5 Rd6d7 h5xg4 Rd7xf7+ Kh7g6 Rf7xf4 Rc2c1+ Kg1f2 Bf3d1 Rf4f6+ Kg6g5 Rf6f8 Rc1b1 Rf8g8+ Kg5f5 h3xg4+ Kf5e4 Rg8g7 Rb1xb3 Rg7xa7 Bd1xg4 Ra7b7 Rb3f3+ Kf2g2 Bg4h3+ Kg2h2

I am not convinced that it is a winning move - a number of engines initially have a small + score and then it appears to drop.

Hi Mark,

Thanks for your results with Spark and Louis too, what about Crafty

?! Maybe Black can escape by a hair, like the biblical camel through a needle's eye. But it is very difficult. I do not know the answer but such a position is pretty rare I think. I know of King Safety issues that are deceiving when the attack turns out to fail but not like this!

Regards,
Eelco

Eelco de Groot · Post by **Eelco de Groot** » Sat Jan 02, 2010 5:00 pm

mcostalba wrote:
Eelco de Groot wrote: But this was the first testgame where Stockfish 1.6.3s was playing fairly well
Hi Eelco,

sorry but what is 1.6.3s ?

Thanks
Marco

Hi Marco,

Sorry, it is not official of course, I hope you are not planning a 1.6.3 version yet that would be an official update, it would be confusing

What do you think about Volker's reported strange, out of bounds, eval results though, could there be a bug in the regular sources or is it just a missing math library? See the other thread, where Dann introduced 1.6.2s. and I mentioned the 1.6.3s Schumacher Formula 1 version.

I am experimenting a little with King Safety again playing testgames with Black only, against my brand new Rybka 2.3.2a and this was the first one where Stockfish could have drawn. If it had not run into this complicated attack on the outpost Knight! Strong play by Rybka 2.3.2a at the end of the middle game again, it was impressive, I had hoped Stockfish would draw.

I am now changing the values of Outpost Knights on the board. I don't really understand that move Kh8? though. 38... Kg8 is surely much better but I have not yet found a way to let Stockfish play it. This is my new variation of the Knight Outpost bonus array:

Code: Select all


// Outpost bonuses for knights and bishops, indexed by square (from white's
// point of view).
const Value KnightOutpostBonus[64] = {
    //  A     B     C     D     E     F     G     H
    V(0), V(0), V(0), V(0), V(0), V(0), V(0), V(0), // 1
    V(0), V(0), V(0), V(0), V(0), V(0), V(0), V(0), // 2
    V(0), V(0), V(8), V(8), V(8), V(8), V(0), V(0), // 3
    V(0), V(4),V(26),V(28),V(28),V(30), V(4), V(0), // 4
    V(0), V(4),V(18),V(20),V(20),V(18), V(4), V(0), // 5
    V(0), V(4),V(18),V(26),V(26),V(18), V(4), V(0), // 6
    V(0), V(0), V(0), V(0), V(0), V(0), V(0), V(0), // 7
    V(0), V(0), V(0), V(0), V(0), V(0), V(0), V(0)  // 8

My assumption is that e4 and d4 are not such good squares to be on for the Knight and you would rather have a pawn on the fourth supporting a Knight on the fifth. But so far I am not seeing enough difference, not enough to help with the position.

Regards,
Eelco

zullil · Post by **zullil** » Sat Jan 02, 2010 5:12 pm

Eelco de Groot wrote: what about Crafty ?!
Regards,
Eelco

Here's Crafty-23.1's opinion:

Code: Select all

Crafty v23.1 (8 cpus)

White(1): book off
book file disabled.
White(1): ponder off
pondering disabled.
White(1): setboard 7k/pb3p2/1p2n2p/3R2pN/P2P2P1/1P3P2/2r4P/4B1K1 w - -
White(1): st 900
search time set to 900.00.
White(1): display stats
display statistics at end of each search.
White(1): display

       +---+---+---+---+---+---+---+---+
    8  |   | . |   | . |   | . |   |<K>|
       +---+---+---+---+---+---+---+---+
    7  |<P>|<B>| . |   | . |<P>| . |   |
       +---+---+---+---+---+---+---+---+
    6  |   |<P>|   | . |<N>| . |   |<P>|
       +---+---+---+---+---+---+---+---+
    5  | . |   | . |-R-| . |   |<P>|-N-|
       +---+---+---+---+---+---+---+---+
    4  |-P-| . |   |-P-|   | . |-P-| . |
       +---+---+---+---+---+---+---+---+
    3  | . |-P-| . |   | . |-P-| . |   |
       +---+---+---+---+---+---+---+---+
    2  |   | . |<R>| . |   | . |   |-P-|
       +---+---+---+---+---+---+---+---+
    1  | . |   | . |   |-B-|   |-K-|   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White(1): go
              time limit 15:00 (+0.00) (15:00)
              depth   time  score   variation (1)
starting thread 1
starting thread 2
starting thread 3
starting thread 4
starting thread 5
starting thread 6
starting thread 7
                9     0.04   0.15   1. Rd6 Kg8 2. d5 Nd4 3. Bg3 Nxf3+ 4.
                                    Kh1 Rd2 5. Rd7 Rd1+ 6. Kg2 Bxd5 7.
                                    Rxa7
                9->   0.05   0.15   1. Rd6 Kg8 2. d5 Nd4 3. Bg3 Nxf3+ 4.
                                    Kh1 Rd2 5. Rd7 Rd1+ 6. Kg2 Bxd5 7.
                                    Rxa7
               10     0.06   0.28   1. Rd6 Bxf3 2. d5 Nd4 3. Rxh6+ Kg8
                                    4. d6 Rg2+ 5. Kf1 Nxb3 6. d7 Nd2+ 7.
                                    Bxd2 Rxd2
               10->   0.08   0.28   1. Rd6 Bxf3 2. d5 Nd4 3. Rxh6+ Kg8
                                    4. d6 Rg2+ 5. Kf1 Nxb3 6. d7 Nd2+ 7.
                                    Bxd2 Rxd2 (s=2)
               11     0.12   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. Rd8+ Kh7 4.
                                    Rd7 Kg6 5. Rd6+ Kh7 6. Rd7
               11->   0.13   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. Rd8+ Kh7 4.
                                    Rd7 Kg6 5. Rd6+ Kh7 6. Rd7
               12     0.19   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. b4 Kh7 4.
                                    Rd7 Kg6 5. Rd6+ Kh7
               12->   0.20   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. b4 Kh7 4.
                                    Rd7 Kg6 5. Rd6+ Kh7
               13     0.32   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. Bb4 Nxb3 4.
                                    Rd8+ Kh7 5. Rd7 Kg6 6. Rd6+ Kh7 7.
                                    Rd7
               13->   0.33   0.01   1. Rd6 Bxf3 2. d5 Nd4 3. Bb4 Nxb3 4.
                                    Rd8+ Kh7 5. Rd7 Kg6 6. Rd6+ Kh7 7.
                                    Rd7
               14     0.75   0.17   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Kg6 5. d5 Rg2+ 6. Kf1 Rd2 7.
                                    Ng8 Kh7 8. dxe6 Rxd6 9. Bxd6 Kxg8
               14->   0.77   0.17   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Kg6 5. d5 Rg2+ 6. Kf1 Rd2 7.
                                    Ng8 Kh7 8. dxe6 Rxd6 9. Bxd6 Kxg8
               15     1.05   0.01   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Nd7+ Kh7 6. d5 Nc5 7.
                                    Nf6+ Kg7 8. Nd7+ Kh7
               15->   1.11   0.01   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Nd7+ Kh7 6. d5 Nc5 7.
                                    Nf6+ Kg7 8. Nd7+ Kh7
               16     1.87   0.18   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Ne5 Rc1+ 6. Kf2 Bd1 7.
                                    Rd7 Bxb3 8. Rxf7+ Kg8 9. Rxa7 Nxd4
                                    10. Rd7 Rc2+ 11. Ke3
               16->   1.98   0.18   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Ne5 Rc1+ 6. Kf2 Bd1 7.
                                    Rd7 Bxb3 8. Rxf7+ Kg8 9. Rxa7 Nxd4
                                    10. Rd7 Rc2+ 11. Ke3
               17     5.03   0.31   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 Nf4 6. Nh5+ Kg6 7.
                                    Nxf4+ gxf4 8. Bxf4 Rg2+ 9. Kf1 Rxg4
                                    10. Be5 f6 11. Kf2
               17->   5.27   0.31   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 Nf4 6. Nh5+ Kg6 7.
                                    Nxf4+ gxf4 8. Bxf4 Rg2+ 9. Kf1 Rxg4
                                    10. Be5 f6 11. Kf2
               18     8.67   0.37   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 a5 6. Rd6 Kg6 7.
                                    Rxb6 Nf4 8. Nd5+ Ne6 9. Rb5 Rg2+ 10.
                                    Kf1 Rxg4 11. Rxa5 Nxd4
               18->   9.27   0.37   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 a5 6. Rd6 Kg6 7.
                                    Rxb6 Nf4 8. Nd5+ Ne6 9. Rb5 Rg2+ 10.
                                    Kf1 Rxg4 11. Rxa5 Nxd4
               19    16.08   0.41   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 a5 6. Rd6 Kg6 7.
                                    Rxb6 Nf4 8. Bxf4 gxf4 9. h4 Re6 10.
                                    Rxe6 fxe6
               19->  16.76   0.41   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg7
                                    4. Be5 Re2 5. Rd7 a5 6. Rd6 Kg6 7.
                                    Rxb6 Nf4 8. Bxf4 gxf4 9. h4 Re6 10.
                                    Rxe6 fxe6
               20    27.80   0.34   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Ne5 Rc1+ 6. Kf2 Bd1 7.
                                    Rd7 Rc7 8. d5 Rxd7 9. Nxd7 Nd4 10.
                                    d6 Bxb3 11. Be5 Nc6
               20->  30.27   0.34   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Ne5 Rc1+ 6. Kf2 Bd1 7.
                                    Rd7 Rc7 8. d5 Rxd7 9. Nxd7 Nd4 10.
                                    d6 Bxb3 11. Be5 Nc6
               21     1:07   0.46   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    d5 Nc5 8. Nf6+ Kg7 9. Ng8+ f6 10. Nxf6
                                    Kf7 11. a5 bxa5 12. Rc6 Bg2+ 13. Kg1
               21->   1:10   0.46   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    d5 Nc5 8. Nf6+ Kg7 9. Ng8+ f6 10. Nxf6
                                    Kf7 11. a5 bxa5 12. Rc6 Bg2+ 13. Kg1
               22     2:15   0.65   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    Nf6+ Kg7 8. h3 Bg2+ 9. Kg1 Bxh3 10.
                                    d5 Nf8 11. Nh5+ Kg8 12. Rxh6 Nh7 <HT>
               22->   2:23   0.65   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    Nf6+ Kg7 8. h3 Bg2+ 9. Kg1 Bxh3 10.
                                    d5 Nf8 11. Nh5+ Kg8 12. Rxh6 Nh7 <HT>
               23     5:31   0.77   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    b4 Bg2+ 8. Ke1 Bf3 9. d5 Re2+ 10. Kf1
                                    Nf4 11. Nf6+ Kg7 12. Nh5+ Kh7 13. Bxf4
                                    gxf4 <HT>
               23->   5:51   0.77   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    b4 Bg2+ 8. Ke1 Bf3 9. d5 Re2+ 10. Kf1
                                    Nf4 11. Nf6+ Kg7 12. Nh5+ Kh7 13. Bxf4
                                    gxf4 <HT>
               24    10:03   0.75   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    b4 Nf4 8. Nf6+ Kg7 9. Nh5+ Kf8 10.
                                    Nxf4 gxf4 11. Bxf4 Be2+ 12. Kg1 Bxg4
                                    13. Rxh6 Bd7 14. a5 bxa5 15. bxa5
               24->  10:46   0.75   1. Rd6 Bxf3 2. Bg3 Kh7 3. Nf6+ Kg6
                                    4. Nd7 Kh7 5. Be5 Re2 6. Kf1 Rc2 7.
                                    b4 Nf4 8. Nf6+ Kg7 9. Nh5+ Kf8 10.
                                    Nxf4 gxf4 11. Bxf4 Be2+ 12. Kg1 Bxg4
                                    13. Rxh6 Bd7 14. a5 bxa5 15. bxa5
              time=15:00  mat=1  n=21302091273  fh=90%  nps=23.7M     
              extensions=1041.0M qchecks=1299.2M reduced=1693.6M pruned=1162.8M
              predicted=0  evals=1465.4M  50move=0  EGTBprobes=315  hits=315
              SMP->  splits=2358751  aborts=330482  data=69/512  elap=15:00
terminating SMP processes.
White(1): Rd6
              time used:  15:00

Testposition

Testposition

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Re: Testposition

Re: Testposition

Re: Testposition

Re: Testposition

Re: Testposition

Re: Testposition