Inaccurate capture by stockfish

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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Inaccurate capture by stockfish

Post by Nordlandia »

At move 117 SF captues the pawn at c4 which i believe is a clear mistake. The c4 pawn is pefectly blocked and hinders the black bishop. After the capture, white's semi-fortress collapsed like a house of cards.
[pgn][Event "Imbalance Test RB vs BN | Opposite-Color"]
[Site "Q9650 | 4-Core | Probing 5-men"]
[Date "2018.02.21"]
[Round "5"]
[White "stockfish_18021519_x64"]
[Black "Houdini 6"]
[Result "0-1"]
[SetUp "1"]
[FEN "r1b1k3/ppp3pp/8/8/8/4N3/PPP2PPP/2K1B3 w - - 0 1"]
[PlyCount "273"]
[EventDate "2018.??.??"]
[TimeControl "900+15"]

1. b3 {-0.97/30 60s} Kf7 {1.09/26 66s} 2. f3 {-0.94/28 29} b6 {1.07/27 32} 3.
a4 {-1.00/30 53} Be6 {1.09/25 32} 4. Kd2 {-1.02/31 14} c5 {1.10/26 22} 5. Ke2 {
-1.05/33 58} Re8 {1.10/27 21} 6. h3 {-1.05/34 88s} Bd7 {1.09/25 22} 7. Kf2 {
-1.05/32 21} Ke6 {1.09/26 26} 8. Ke2 {-1.04/35 121s} g6 {1.09/27 28} 9. Bg3 {
-1.04/35 28} g5 {1.10/28 24} 10. h4 {-1.19/34 27} gxh4 {1.10/31 28} 11. Bxh4 {
-1.20/36 24} Bc6 {1.10/30 6.8s} 12. Kf2 {-1.11/35 26} Rg8 {1.22/30 142s} 13.
Bg3 {-1.20/38 55} h5 {1.31/31 29} 14. Bh4 {-1.17/36 35} Be8 {1.26/30 31} 15.
Kg1 {-1.14/33 19} Bg6 {1.19/31 31} 16. Kf1 {-1.13/33 12} a6 {1.19/33 38} 17.
Ke1 {-1.45/35 74s} b5 {1.25/33 91s} 18. Kd2 {-1.46/39 22} bxa4 {1.40/30 19} 19.
bxa4 {-1.83/41 173s} Rb8 {1.44/32 29} 20. a5 {-2.06/38 113s} Rb4 {1.44/31 9.7s}
21. Be1 {-1.96/37 15} Ra4 {1.44/33 35} 22. Kd1 {-2.09/37 39} Ra1+ {1.52/34 67s}
23. Ke2 {-2.10/32 6.5s} Ra2 {1.52/35 58} 24. Kd1 {-2.10/37 20} Be8 {1.58/31 28}
25. Bc3 {-2.07/30 9.5s} Ra3 {1.68/33 23} 26. Kd2 {-2.01/36 17} h4 {1.65/31 43}
27. Nc4 {-2.00/35 14} Ra2 {1.65/30 0.94s} 28. Ne3 {-2.02/34 37} Bg6 {1.66/33 28
} 29. Kd1 {-1.87/30 5.2s} Ra3 {1.67/29 8.9s} 30. Bd2 {-1.96/37 17} Ra1+ {
1.73/31 55} 31. Ke2 {-2.05/37 29} Ra2 {1.84/31 34} 32. Kd1 {-2.12/38 18} Ke5 {
1.71/31 37} 33. Bc3+ {-2.21/34 37} Kf4 {1.81/30 45} 34. Kd2 {-2.27/33 14} h3 {
1.68/25 7.7s} 35. gxh3 {-2.26/31 13} Kxf3 {1.86/29 15} 36. Bf6 {-2.22/37 63s}
Ke4 {1.80/30 32} 37. Bc3 {-2.36/31 20} Ra4 {1.87/28 27} 38. h4 {-2.34/34 15}
Bf7 {1.87/29 52} 39. Ng2 {-2.25/29 19} Kd5 {2.08/24 15} 40. Bf6 {-2.54/31 25}
Bg6 {2.18/24 16} 41. Ne3+ {-2.26/26 8.2s} Kc6 {2.25/26 15} 42. Kc1 {-2.74/30 22
} Bf7 {2.32/28 17} 43. Bd8 {-2.74/29 12} Kb5 {2.32/27 0.10s} 44. Kb2 {-2.74/34
11} Rd4 {2.46/29 25} 45. Be7 {-2.97/36 22} Re4 {2.69/28 13} 46. Bg5 {-3.05/37
15} Kxa5 {2.92/26 23} 47. Bd8+ {-3.30/31 15} Kb5 {2.97/30 17} 48. Bg5 {-3.30/
38 9.8s} Rb4+ {2.97/29 4.2s} 49. Kc1 {-3.30/39 9.6s} a5 {2.97/33 21} 50. Nd1 {
-3.68/32 15} Bg6 {2.97/33 6.7s} 51. Nc3+ {-2.76/37 4.3s} Kc6 {2.97/37 26} 52.
Nb1 {-2.71/39 6.2s} Rc4 {2.97/36 12} 53. Na3 {-2.71/44 8.5s} Rg4 {2.97/37 20}
54. Kb2 {-2.71/47 11} a4 {2.97/35 33} 55. Kc1 {-2.71/45 9.7s} Rb4 {2.97/37 29}
56. Nb1 {-2.71/49 9.3s} Bf7 {2.97/36 24} 57. Na3 {-2.71/53 9.1s} Rg4 {2.97/36
17} 58. Kb2 {-2.71/54 11} Kd5 {2.97/38 49} 59. Kc3 {-2.71/51 15} Rg2 {2.97/37
15} 60. Bf4 {-2.71/50 11} Rf2 {2.97/37 19} 61. Bd2 {-2.71/51 11} Bg6 {2.97/37
20} 62. Bc1 {-2.71/45 9.9s} Rh2 {2.97/34 17} 63. Bg5 {-2.71/50 10} Bf5 {
2.97/34 14} 64. Bd8 {-2.71/50 11} Rg2 {2.97/37 18} 65. Be7 {-2.71/48 11} Kc6 {
2.97/35 14} 66. Bg5 {-2.71/50 13} Rg3+ {2.97/36 16} 67. Kb2 {-2.71/53 16} Be6 {
2.97/36 3.8s} 68. Nb1 {-2.71/53 12} Rg2 {2.97/38 23} 69. Kc3 {-2.71/53 13} Rg1
{2.97/36 17} 70. Kb2 {-2.71/56 12} Rg3 {2.97/36 3.1s} 71. Bd2 {-2.71/51 16} Rh3
{2.97/37 17} 72. Bg5 {-2.71/54 11} Bf5 {2.97/37 15} 73. Bf6 {-2.71/52 34} Kd5 {
2.97/35 14} 74. Na3 {-2.71/50 11} Bg6 {2.97/36 16} 75. Bg5 {-2.71/51 10} Bf7 {
2.97/36 6.4s} 76. Bf6 {-2.71/47 14} Bg8 {2.97/33 23} 77. Nb1 {-2.71/46 13} Kd6
{2.96/29 26} 78. Bd8 {-2.71/45 13} Kc6 {1.99/33 42} 79. Bg5 {-2.71/45 14} Be6 {
1.99/32 10} 80. Na3 {-2.71/51 13} Rh2 {1.99/33 14} 81. Bf6 {-2.71/54 14} Kd5 {
1.99/32 4.1s} 82. Kc3 {-2.71/52 12} Bg8 {2.05/32 13} 83. Nb1 {-2.71/51 13} Bh7
{2.15/28 11} 84. Na3 {-2.71/53 11} Rf2 {2.19/29 15} 85. Bg5 {-2.71/48 15} Rf3+
{2.28/27 8.8s} 86. Kb2 {-2.71/50 12} c4 {2.28/29 3.1s} 87. Bd2 {-2.71/44 12}
Rh3 {2.28/32 17} 88. h5 {-2.71/48 32} Rxh5 {2.28/31 7.5s} 89. Kc3 {-2.71/49 8.
8s} Rh2 {2.28/32 26} 90. Bc1 {-2.71/45 11} Rg2 {2.28/32 25} 91. Bd2 {-2.71/50
15} Rg4 {2.28/33 24} 92. Bc1 {-2.71/46 14} Bf5 {2.28/32 6.1s} 93. Bd2 {-2.71/
49 13} Rg3+ {2.28/32 17} 94. Kb4 {-2.71/49 12} Rg2 {2.28/33 17} 95. Kc3 {
-2.71/50 12} Rg6 {2.28/34 16} 96. Be1 {-2.71/47 15} Rc6 {2.28/32 14} 97. Bg3 {
-2.71/49 15} Rb6 {2.28/32 19} 98. Be1 {-2.71/48 13} Ra6 {2.28/33 17} 99. Bh4 {
-2.71/49 14} Be6 {2.28/31 15} 100. Nb5 {-2.71/44 12} Rc6 {2.28/32 16} 101. Bg5
{-2.71/45 21} Rb6 {2.28/33 15} 102. Na3 {-2.71/50 12} Rb8 {2.28/31 15} 103. Be3
{-2.71/48 12} Rc8 {2.28/31 14} 104. Kb4 {-2.71/48 17} Re8 {2.28/29 15} 105. Kc3
{-2.71/47 11} Bd7 {2.28/31 13} 106. Bd2 {-2.71/49 12} Ra8 {2.28/28 35} 107. Bh6
{-2.71/53 15} Bf5 {2.28/25 15} 108. Bd2 {-2.71/53 13} Rc8 {2.27/25 17} 109. Be3
{-2.71/51 18} Rc6 {2.19/25 15} 110. Bg5 {-2.71/48 13} Rg6 {1.64/26 15} 111. Bf4
{-2.71/49 21} Ra6 {1.64/28 9.3s} 112. Be3 {-2.71/52 23} Be6 {1.64/31 14} 113.
Kb4 {-2.71/49 13} Ra8 {1.64/31 15} 114. Bc1 {-2.71/50 13} Rb8+ {1.64/29 11}
115. Kc3 {-2.71/53 12} Bh3 {1.64/31 26} 116. Bf4 {-2.71/49 16} Rb7 {1.64/30 13}
117. Nxc4 {-2.40/38 8.3s} Bf5 {1.64/31 11} 118. Na3 {-2.40/46 12} Ke4 {1.64/27
10} 119. Bc1 {-2.40/47 22} Kf3 {1.65/31 12} 120. Kd2 {-2.40/48 21} Rc7 {
1.65/31 15} 121. Kd1 {-2.40/48 9.8s} Rd7+ {1.65/30 4.6s} 122. Bd2 {-2.40/46 13}
Kf2 {1.72/30 16} 123. Nb5 {-2.40/44 13} Rd8 {2.08/30 24} 124. Na3 {-2.40/51 30}
Bg6 {2.20/30 13} 125. Nb1 {-2.72/44 37} Kf3 {2.20/30 30} 126. Na3 {-2.89/42 15}
Bh5 {2.34/29 9.2s} 127. Nb5 {-3.24/42 47} Ra8 {2.43/29 9.4s} 128. Bc1 {-3.28/
39 7.4s} Rb8 {2.70/25 8.6s} 129. Nd6 {-3.29/38 13} Bg6 {3.00/24 8.8s} 130. Nc4
{-3.29/42 17} Rd8+ {3.32/28 8.0s} 131. Bd2 {-3.29/43 9.8s} Rh8 {3.78/27 9.6s}
132. Ba5 {-4.60/36 65s} Rh1+ {4.27/29 9.8s} 133. Kd2 {-6.22/34 34} Rh2+ {
4.87/28 11} 134. Kc3 {-6.77/32 17} Rxc2+ {5.78/24 12} 135. Kd4 {-6.62/29 15}
Bf7 {8.11/22 10} 136. Na3 {-9.00/29 15} Rb2 {8.99/22 9.3s} 137. Kc5 {
adjudication} 0-1

[/pgn]

[d]8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117
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Nordlandia
Posts: 2821
Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Inaccurate capture by stockfish

Post by Nordlandia »

Further analysis comfirms 117. Nxc4 is disastrous ->

Code: Select all

New game Line
8/1r6/8/3k4/p1p2B2/N1K4b/2P5/8 w - - 0 1

Analysis by Stockfish 180218 64 POPCNT:

117.Bg5 Bf5 118.Bf4 Be6 119.Bd2 Rg7 120.Bc1 Bf5 121.Bf4 Rg2 122.Bd2 Rg3+ 123.Kb4 Bd7 124.Bc1 Rg4 125.Bd2 Rg8 126.Be3 Rb8+ 127.Kc3 Bf5 128.Bf4 Rf8 129.Be3 Be6 130.Kb4 Re8 131.Bf4 Bf5 132.Bg5 Re2 133.Kc3 Kc5 134.Bd2 Be6 135.Bc1 Re4 136.Bg5 Bf5 137.Bd2 Re2 138.Bg5 Rg2 139.Be3+ Kc6 140.Bh6 Rh2 141.Bd2 Kd5 142.Bc1 Rh4 143.Bd2 Rh3+ 144.Kb4 Rh2 145.Bf4 Rf2 
  Black has a decisive advantage: -+ (-2.77)  Depth: 54/58   00:01:11  405MN, tb=7667058
(22.02.2018)

Code: Select all

New game Line
8/1r6/8/3k4/p1p2B2/N1K4b/2P5/8 w - - 0 1

Analysis by Houdini 6.03 Pro x64-popc:

117.Bc1 Bd7 118.Bf4 Ra7 119.Be3 Ra8 120.Kb4 Rb8+ 121.Kc3 Re8 122.Bd2 Rc8 123.Be3 Rf8 124.Bd2 Rf3+ 125.Kb4 Rh3 126.Bc1 Rh2 127.Bg5 Rg2 128.Bf6 Rg8 129.Be7 Rg4 130.Bf6 Rg2 131.Kc3 Rg3+ 132.Kb4 Rg4 133.Be7 Rg8 134.Bf6 Rb8+ 135.Kc3 Be6 136.Be7 Re8 137.Bg5 Bf5 138.Kb4 
  Black is clearly better: -+ (-2.47)  Depth: 37/60   00:01:03  514MN, tb=9781153
(,  22.02.2018)

Code: Select all

New game Line
8/1r6/8/3k4/p1p2B2/N1K4b/2P5/8 w - - 0 1

Analysis by Komodo 11.2.2 64-bit:

117.Bg5 Bf5 118.Bd8 Ra7 119.Bf6 Rf7 120.Bg5 Rg7 121.Bh6 Rg4 122.Bd2 Rg3+ 123.Kb4 Rg2 124.Kc3 Rg6 125.Bf4 Ra6 126.Bd2 Re6 127.Bf4 Rb6 128.Be3 Rf6 129.Kb4 Re6 130.Bc1 Bg6 131.Bf4 Re2 132.Kc3 Rf2 133.Bd2 Rf7 134.Kb4 Rb7+ 135.Kc3 Rc7 136.Bc1 Rf7 137.Bg5 Rg7 
  Black has a decisive advantage: -+ (-2.55)  Depth: 39   00:01:05  518MN, tb=20433780
(,  22.02.2018)
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zullil
Posts: 6442
Joined: Tue Jan 09, 2007 12:31 am
Location: PA USA
Full name: Louis Zulli

Re: Inaccurate capture by stockfish

Post by zullil »

Nordlandia wrote:At move 117 SF captues the pawn at c4 which i believe is a clear mistake. The c4 pawn is pefectly blocked and hinders the black bishop. After the capture, white's semi-fortress collapsed like a house of cards.

[d]8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117
Cfish with 6-man tables certainly avoids the capture. I assume you are not using endgame tables.
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Nordlandia
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Joined: Fri Sep 25, 2015 9:38 pm
Location: Sortland, Norway

Re: Inaccurate capture by stockfish

Post by Nordlandia »

Both engines consulted 5-men syzygy during search.

It turns out that 5-men help is not adequate in that position. 6-men is required.
In short: probing 6-men avoid capture whereas consulting 5-men want capture.

Extraordinary phenomena.
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Eelco de Groot
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Re: Inaccurate capture by stockfish

Post by Eelco de Groot »

zullil wrote:
Nordlandia wrote:At move 117 SF captues the pawn at c4 which i believe is a clear mistake. The c4 pawn is pefectly blocked and hinders the black bishop. After the capture, white's semi-fortress collapsed like a house of cards.

[d]8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117
Cfish with 6-man tables certainly avoids the capture. I assume you are not using endgame tables.
Could you maybe give some scores with 6 men tablebases Louis, or Jon?

Kaissa thinks that at move 132., Kc1 would have been much better, it seems to have been missed by Stockfish. But with (6 men) tablebases it could look of course much different and this is just small depth output:


[D]7r/8/6b1/8/p1N5/5k2/2PB4/3K4 w - -

Engine: Kaissa II (512 MB)
by T. Romstad, M. Costalba, J. Kiiski, G. Linscott

33 12:57 -3.42 132.Kc1 Ke2 133.Bg5 Rc8 134.Na3 Bxc2
135.Nxc2 Kd3 136.Kb2 Rxc2+ 137.Ka3 Kc4
138.Be7 Kb5 139.Bb4 Re2 140.Bf8 Re3+
141.Ka2 Rc3 142.Kb2 Rb3+ 143.Ka2 Kc4
144.Ba3 Rb8 145.Be7 (2.127.146.698) 2734

33 12:57 -4.78 132.Bg5 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kb4 Be8 136.Bf6 Rc1 137.Bb2 Rd1
138.Bc3 Ke2 139.Na3 Kd3 140.Bg7 Rc1
141.Ka5 Rc5+ 142.Ka6 Rd5 143.Kb6 Rd6+
144.Ka5 Rg6 145.Bb2 (2.127.146.698) 2734

33 12:57 -5.12 132.Ba5 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kb4 Be8 136.Na3 Rc1 137.Bd8 Ke4
138.Bg5 Rg1 139.Be7 Kd3 140.Bf6 Rg6
141.Be5 Rg4+ 142.Kc5 Re4 143.Kd6 Rb4
144.Ke7 Rb3 145.Bd6 (2.127.146.698) 2734

33 12:57 -5.77 132.Bb4 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kd4 Ke2 136.Ne3 Rc8 137.Nd5 Rd8
138.Kc5 Be8 139.Nf4+ Ke3 140.Ne6 Rc8+
141.Kd6 Kd3 142.Ke7 Kc4 143.Bd6 Bg6
144.Nf4 Rc6 145.Ne2 (2.127.146.698) 2734

33 12:57 -6.25 132.Be1 Rh1 133.Na3 Ke3 134.Nc4+ Kd4
135.Na3 Ke4 136.Ke2 Rh2+ 137.Bf2 Kf4
138.c3 Ke4 139.c4 Bh5+ 140.Ke1 Kd3
141.Kf1 Bf3 142.Bc5 Kc3 143.Bf8 Ra2
144.Ke1 Kb3 145.Nb5 (2.127.146.698) 2734
____________________________________________________

34 19:55 -3.42 132.Kc1 Ke2 133.Bg5 Rc8 134.Na3 Bxc2
135.Nxc2 Kd3 136.Kb2 Rxc2+ 137.Ka3 Kc4
138.Be7 Kb5 139.Bb4 Re2 140.Bf8 Re3+
141.Ka2 Rc3 142.Kb2 Rb3+ 143.Ka2 Kc4
144.Ba3 Rb8 145.Be7 (3.245.379.287) 2715

34 19:55 -5.77 132.Bb4 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kd4 Ke2 136.Ne3 Rc8 137.Nd5 Rd8
138.Kc5 Be8 139.Nf4+ Ke3 140.Ne6 Rc8+
141.Kd6 Kd3 142.Ke7 Kc4 143.Bd6 Bg6
144.Nf4 Rc6 145.Ba3 (3.245.379.287) 2715

34 19:55 -5.88 132.Bg5 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kb4 Be8 136.Bf6 Rc1 137.Bb2 Rd1
138.Bc3 Rb1+ 139.Ka5 Rc1 140.Kb4 Ke2
141.Bb2 Rb1 142.Ka3 Kd3 143.Nd6 Bd7
144.Nb7 Kc2 145.Nc5 (3.245.379.287) 2715

34 19:55 -6.05 132.Ba5 Rh1+ 133.Kd2 Rh2+ 134.Kc3 Rxc2+
135.Kd4 Ke2 136.Bc3 Rc1 137.Na3 Bf7
138.Bb2 Rc6 139.Bc3 Kd1 140.Bb4 Kc1
141.Bc5 Kb2 142.Nb5 Kc2 143.Na3+ Kb3
144.Bf8 Bg8 145.Nb1 (3.245.379.287) 2715

34 19:55 -6.33 132.Be1 Rh1 133.Na3 Ke3 134.Nc4+ Kd4
135.Na3 Ke4 136.Ke2 Rh2+ 137.Bf2 Kf4
138.c3 Ke4 139.c4 Bh5+ 140.Ke1 Kd3
141.Kf1 Bf3 142.Bc5 Kc3 143.Bf8 Ra2
144.Ke1 Kb3 145.Nb5 (3.245.379.287) 2715
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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zullil
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Joined: Tue Jan 09, 2007 12:31 am
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Full name: Louis Zulli

Re: Inaccurate capture by stockfish

Post by zullil »

Eelco de Groot wrote:
zullil wrote:
Nordlandia wrote:At move 117 SF captues the pawn at c4 which i believe is a clear mistake. The c4 pawn is pefectly blocked and hinders the black bishop. After the capture, white's semi-fortress collapsed like a house of cards.

[d]8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117
Cfish with 6-man tables certainly avoids the capture. I assume you are not using endgame tables.
Could you maybe give some scores with 6 men tablebases Louis, or Jon?

Kaissa thinks that at move 132., Kc1 would have been much better, it seems to have been missed by Stockfish. But with (6 men) tablebases it could look of course much different and this is just small depth output:
Will need to do that later, but Cfish gives a tablebase win score for Black after Nxc4.
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Nordlandia
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Re: Inaccurate capture by stockfish

Post by Nordlandia »

Louis Zulli: Set SyzygyProbeLimit at at 5.
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zullil
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Full name: Louis Zulli

Re: Inaccurate capture by stockfish

Post by zullil »

Nordlandia wrote:Louis Zulli: Set SyzygyProbeLimit at at 5.
With SyzygyProbeLimit = 5, Cfish does not (yet) see the win for Black:
[D] 8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117

Code: Select all

-2.31 117... Bf5 118. Na3 Ke4 119. Bg5 Kf3 120. Kd2 Rc7 121. Bf6 Rc6 122. Bg5 Ke4 123. Kc1 Kd4 124. Kd2 Kd5 125. Be7 Bd7 126. Kc1 Rb6 127. Bh4 Rb7 128. Bg3 Be6 129. Bf4 Ke4 130. Bg5 Kd4 131. Bd2 Bd7 132. Be1 Ke4 133. Kd2 Be6 134. Bh4 Rh7 135. Bf6 Rh3 136. Bb2 Kd5 137. Bc3 Bd7 138. Bb4 Kd4 139. Ke2 Rh2+ 140. Kd1 Bc6 141. Kc1 Be4 142. Bd2 Kc5 143. Be3+ Kc6 144. Bd2 Rh1+ 145. Kb2 Rh3 146. Bf4 Bg6 147. Nc4 Kc5 148. Na3 Rf3 149. Bd2 Kd4 150. Bg5 Bf7 151. Nb5+ Kc5 152. Na3 Kc6 153. Be7 Rh3 154. Bg5 Bg6 155. Bf4 Be4 156. Bg5 Rg3 157. Bf6 Rf3 158. Bc3 Rh3 159. Bf6 Rg3 160. Nb1 Bf5 (depth 82, 0:46:44)
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MikeB
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Re: Inaccurate capture by stockfish

Post by MikeB »

zullil wrote:
Nordlandia wrote:Louis Zulli: Set SyzygyProbeLimit at at 5.
With SyzygyProbeLimit = 5, Cfish does not (yet) see the win for Black:
[D] 8/1r6/8/3k4/p1N2B2/2K4b/2P5/8 b - - 0 117

Code: Select all

-2.31 117... Bf5 118. Na3 Ke4 119. Bg5 Kf3 120. Kd2 Rc7 121. Bf6 Rc6 122. Bg5 Ke4 123. Kc1 Kd4 124. Kd2 Kd5 125. Be7 Bd7 126. Kc1 Rb6 127. Bh4 Rb7 128. Bg3 Be6 129. Bf4 Ke4 130. Bg5 Kd4 131. Bd2 Bd7 132. Be1 Ke4 133. Kd2 Be6 134. Bh4 Rh7 135. Bf6 Rh3 136. Bb2 Kd5 137. Bc3 Bd7 138. Bb4 Kd4 139. Ke2 Rh2+ 140. Kd1 Bc6 141. Kc1 Be4 142. Bd2 Kc5 143. Be3+ Kc6 144. Bd2 Rh1+ 145. Kb2 Rh3 146. Bf4 Bg6 147. Nc4 Kc5 148. Na3 Rf3 149. Bd2 Kd4 150. Bg5 Bf7 151. Nb5+ Kc5 152. Na3 Kc6 153. Be7 Rh3 154. Bg5 Bg6 155. Bf4 Be4 156. Bg5 Rg3 157. Bf6 Rf3 158. Bc3 Rh3 159. Bf6 Rg3 160. Nb1 Bf5 (depth 82, 0:46:44)
6man on ssd :

dev-SF-McB ( not yet released)

Code: Select all

dep	score	nodes	time	(not shown:  tbhits	knps	seldep)
 44	 -132.69 	2.38G	1:33.90	Rf7 Bh2 Rf2 Bb8 Rf8 Ne3+ Ke4 Bd6 Rf6 Nc4 Kd5 Kb4 a3 Be5 Rf1 Bg7 Rb1+ Kc3 a2 Ne3+ Ke4 Kd2 a1=Q Bxa1 Rxa1 Nd1 Kd4 Nf2 Bf5 Nd1 Ra2 Ne3 Bg6 Ke2 Bxc2 Nf1 
 43	 -132.69 	2.36G	1:33.04	Rf7 Bh2 Rf2 Bb8 Rf8 Ne3+ Ke4 Bd6 Rf6 Nc4 Kd5 Kb4 a3 Be5 Rf1 Bg7 Rb1+ Kc3 a2 Ne3+ Ke4 Kd2 a1=Q Bxa1 Rxa1 Nd1 Kd4 Nf2 Bf5 Nd1 Ra2 Ne3 Bg6 Ke2 Bxc2 Ng4 
 42	 -132.68 	2.10G	1:22.31	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Ba7 Ke2 Bd4 Kd2 c3 Rb1 Bf6 Rb3+ Kxa4 
 41	 -132.68 	1.28G	0:49.37	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Ba7 Ke2 Bd4 Kd2 c3 Rb1 Bf6 Rb3+ Kxa4 
 40	 -132.68 	1.19G	0:46.08	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Bd4 Rc1 Kb2 Rd1 Bg7 a3+ Kc3 Be4 Kc4 Bxc2 Kb4 a2 Ka3 a1=Q+ Bxa1 
 39	 -132.68 	1.18G	0:45.42	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Bd4 Rc1 Kb2 Rd1 Bg7 a3+ Kc3 Be4 Kb4 Bxc2 Bf6 a2 Ka3 a1=Q+ Bxa1 
 38	 -132.68 	1.16G	0:44.68	Rf7 Bh2 Rf2 Bg1 Rf3+ Ne3+ Ke4 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Bd4 Rc1 Kb2 Rd1 Bg7 a3+ Kc3 Be4 Kc4 Bxc2 Kb4 a2 Ka3 a1=Q+ Bxa1 
 37	 -132.68 	1.15G	0:44.36	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 Ka3 Rh3 Bf2 Kf3 Bg1 Rh1 Nd5 Bxd5 Bd4 Rc1 Kb2 Rd1 Bg7 a3+ Kc3 Be4 Kc4 Bxc2 Kb4 a2 Ka3 a1=Q+ Bxa1 
 36	 -132.67 	1.13G	0:43.53	Rf7 Bh2 Rf2 Ne3+ Ke4 Bg1 Rf3 Kb4 Be6 c3 a3 Kxa3 Rg3 Bf2 Rh3 Kb4 Rh2 Nd1 Rh1 Nb2 Rb1 Ka3 Ra1+ Kb4 Ra2 Nd1 Rd2 Be1 Rxd1 Bh4 Rf1 Bg5 Kd3 Bh4 Rf4+ Kc5 Rxh4 Kd6 Kxc3 Ke7 
 36	 -132.55!	874.5M	0:33.89	Rf7! 
 36	 -61.70!	870.4M	0:33.74	Rf7! 
 36	 -61.32!	862.3M	0:33.42	Rf7! 
 36	 -58.30!	855.7M	0:33.17	Rf7! 
 36	 -57.92!	850.7M	0:32.98	Rf7! 
 36	 -56.40!	846.1M	0:32.80	Rf7! 
 36	 -56.02!	837.7M	0:32.49	Rf7! 
 36	 -54.21!	837.0M	0:32.47	Rf7! 
 36	 -52.79!	833.4M	0:32.33	Rf7! 
 36	 -51.78!	832.8M	0:32.30	Rf7! 
 36	 -51.24!	829.9M	0:32.19	Rf7! 
 36	 -50.86!	826.9M	0:32.08	Rf7! 
 36	 -19.73!	812.9M	0:31.54	Rf7! 
 36	 -19.39!	787.9M	0:30.62	Rf7! 
 36	 -19.04!	753.1M	0:29.38	Rf7! 
 36	 -18.70!	718.0M	0:28.15	Rf7! 
 36	 -18.35!	705.3M	0:27.69	Rf7! 
 36	 -18.00!	695.0M	0:27.31	Rf7! 
 36	 -17.66!	685.3M	0:26.97	Rf7! 
 36	 -17.31!	665.4M	0:26.25	Rf7! 
 36	 -16.97!	636.0M	0:25.17	Rf7! 
 36	 -16.62!	595.2M	0:23.69	Rf7! 
 36	 -16.27!	541.3M	0:21.79	Rf7! 
 36	 -15.93!	499.4M	0:20.30	Rf7! 
 36	 -15.58!	457.0M	0:18.79	Rf7! 
 36	 -15.24!	417.3M	0:17.36	Rf7! 
 36	 -14.89!	397.5M	0:16.63	Rf7! 
 36	 -14.55!	387.0M	0:16.24	Rf7! 
 36	 -14.20!	378.0M	0:15.90	Rf7! 
 36	 -13.85!	369.6M	0:15.60	Rf7! 
 36	 -13.51!	357.1M	0:15.12	Rf7! 
 36	 -13.16!	343.6M	0:14.62	Rf7! 
 36	 -12.82!	328.1M	0:14.06	Rf7! 
 36	 -12.47!	316.6M	0:13.65	Rf7! 
 36	 -12.12!	304.3M	0:13.20	Rf7! 
 36	 -11.78!	292.5M	0:12.76	Rf7! 
 36	 -11.43!	281.8M	0:12.37	Rf7! 
 36	 -11.09!	271.1M	0:11.99	Rf7! 
 36	 -10.74!	260.7M	0:11.61	Rf7! 
 36	 -10.40!	248.7M	0:11.16	Rf7! 
 36	 -10.05!	237.0M	0:10.72	Rf7! 
 36	 -9.70!	224.1M	0:10.24	Rf7! 
 36	 -9.36!	215.1M	0:09.89	Rf7! 
 36	 -9.01!	202.5M	0:09.40	Rf7! 
 36	 -8.67!	192.5M	0:09.02	Rf7! 
 36	 -8.32!	185.0M	0:08.74	Rf7! 
 36	 -7.97!	174.9M	0:08.34	Rf7! 
 36	 -7.63!	165.2M	0:07.96	Rf7! 
 36	 -7.28!	154.9M	0:07.56	Rf7! 
 36	 -6.94!	144.8M	0:07.15	Rf7! 
 36	 -6.59!	134.2M	0:06.70	Rf7! 
 36	 -6.25!	125.9M	0:06.36	Rf7! 
 36	 -5.90!	119.0M	0:06.08	Rf7! 
 36	 -5.55!	111.7M	0:05.77	Rf7! 
 36	 -5.21!	104.7M	0:05.47	Rf7! 
 36	 -4.86!	97.3M  	0:05.14	Rf7! 
 36	 -4.52!	92.3M  	0:04.89	Rf7! 
 36	 -4.17!	82.3M  	0:04.44	Rf7! 
 36	 -3.82!	69.6M  	0:03.81	Rf7! 
 36	 -3.48!	61.4M  	0:03.42	Rf7! 
 35	 -3.13 	45.1M  	0:02.59	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Ka5 Ka3 Bd5 Kb2 Bg8 Ka3 Be6 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Bd8 Ke4 Be7 Kd3 Bb4 Rh2 Kb1 Re2 Kc1 Bd5 Ba5 Ba2 Bb4 Bb3 Ba5 Ra2 Bb4 Be6 Kb1 Re2 Ba5 Rg2 Kc1 
 34	 -3.13 	39.7M  	0:02.31	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Ka5 Ka3 Bd5 Kb2 Bg8 Ka3 Be6 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Bd8 Ke4 Be7 Kd3 Bb4 Rh2 Kb1 Re2 Ka1 Bd5 Kb1 Ba2+ Kc1 Bb3 Kb1 Ra2 Nb5 Rc2 Na3 
 33	 -3.13 	35.0M  	0:02.07	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Ka5 Ka3 Bd5 Kb2 Bg8 Ka3 Be6 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Bd8 Ke4 Be7 Kd3 Bb4 Ra2 Kb1 Re2 Ka1 Bd5 Kb1 Ba2+ Kc1 Bb3 Kb1 Be6 Kc1 Ra2 
 32	 -3.13 	32.4M  	0:01.93	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Ka5 Ka3 Bd5 Kb2 Bg8 Ka3 Be6 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Bd8 Ke4 Be7 Kd3 Bb4 Ra2 Kb1 Re2 Kc1 Bd5 Ba5 Ba2 Bb4 
 31	 -3.13 	29.4M  	0:01.77	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 c3 Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Bd8 Ke4 Be7 Kd3 Bb4 Ra2 Kb1 Re2 Kc1 Bd5 Ba5 Ba2 Bb4 Bb3 Ba5 Re1+ Kb2 Re5 Bb4 Rf5 Kc1 Rf1+ Kb2 Rf2+ Kc1 
 30	 -3.14 	25.1M  	0:01.54	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Ka5 Ka3 Bd5 Kb2 Bg8 Ka3 Be6 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Kb1 Bb3 Kc1 
 29	 -3.12 	20.8M  	0:01.29	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Ba5 Ra2 Bb4 Rg2 Kb1 Bb3 Kc1 Re2 Kb1 Ra2 Kc1 
 28	 -3.12 	18.7M  	0:01.16	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Ba5 Ra2 Bb4 Rg2 Kb1 Bb3 Kc1 Rh2 Kb1 
 27	 -3.14 	15.7M  	0:00.99	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Ba5 Ra2 Bb4 Bb3 Kb1 Rh2 Nb5 Bc4 Na3 
 26	 -3.12 	14.5M  	0:00.93	Rf7 Bh2 Rf2 Bg1 Rf3+ Ne3+ Kc5 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Ba5 Ra2 Bb4 Bb3 Kb1 Rg2 Kc1 
 25	 -3.12 	13.8M  	0:00.89	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Be6 Kc1 Re2 Ba5 Ra2 Bb4 Bb3 Kb1 Re2 Kc1 Bd5 
 24	 -3.12 	13.4M  	0:00.86	Rf7 Bh2 Rf2 Ne3+ Kc5 Bg1 Rf3 Kb2 Be6 Ka3 Kb5 Kb2 Kb4 c3+ Kb5 Nc2 Rg3 Bd4 Rg2 Kc1 Bb3 Na3+ Kc6 Bf6 Kd5 Be7 Ke4 Bb4 Kd3 Kb1 Ba2+ Kc1 Bd5 Kb1 Rg1+ Kb2 Rg6 Kc1 Re6 Nc2 Re2 Na3 Rf2 Nb5 Rc2+ Kb1 Rh2 Kc1 Rf2 Na3 Rf1+ Kb2 Re1 
 23	 -2.94 	8.65M  	0:00.58	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bh8 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Kb5 Bc1 Rh3 Bd2 Rh2 Bc3 Kc5 Be5 Rh3 c3 Rh1 Kb2 Re1 Bd4+ Kb5 Nc2 Re2 Kc1 Kc4 Bf6 Rf2 Bd4 Rh2 Bg7 Kd3 Nb4+ Kc4 
 22	 -2.55 	5.56M  	0:00.40	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Kb5 Bc1 Rh3 Kb2 Rh1 Bd2 Rh2 Bc3 Kc5 Be5 Rh1 Bb8 Rh3 c3 Kc6 Nc2 Kd5 Bc7 Kc4 Be5 Kd5 Bb8 
 21	 -2.62 	5.42M  	0:00.39	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Kb5 Bc1 Rh3 Bd2 Rh2 Bc1 Re2 Nd1 Rxc2 Bb2 Kc5 
 20	 -2.63 	5.24M  	0:00.38	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Kb5 Bc1 Rh3 Bd2 Rh2 Bc3 Kc5 Be5 Rh3 c3 Rh1 Kb2 Re1 Bd4+ Kb5 Nc2 Re2 Kc1 Rh2 Na3+ Kc6 Nc2 
 19	 -2.47 	4.27M  	0:00.31	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Kb5 Bc1 Rh3 Bd2 Rh2 Bc3 Kc5 Be5 Re2 Bf4 Bd7 Kb2 Kd4 Ka3 
 18	 -2.43 	2.97M  	0:00.21	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bd2 Bd7 Bb4+ Kb6 Bd2 Kb5 c4+ Kc5 Bb4+ Kd4 Bd2 Kd3 Bc1 Kc3 c5 Kd4 Kb4 
 17	 -2.43 	2.47M  	0:00.18	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bc3 Kc5 Ka3 Rf3 Bb4+ Kc6 Bd2 Kb5 Bc1 Bd7 Bd2 Rh3 Bc1 Rh2 Bb2 Kc5 
 16	 -2.32 	2.16M  	0:00.15	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bb4+ Kb5 Bd2 Bd7 c4+ Kc5 Bb4+ Kd4 Bd2 Rh3 Kb4 Rh2 Bc1 Rh1 
 15	 -2.32 	2.08M  	0:00.15	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rf4 Bg7 Kb4 Bc3+ Kc5 Ka3 Rf3 Bb4+ Kb5 Bd2 Bd7 c3 Kc5 
 14	 -2.36 	1.97M  	0:00.14	Rf7 Bh2 Rf2 Ne3+ Kc5 Be5 Be6 Bd4+ Kc6 Kb2 Rf4 Bc3 Kc5 Ka3 Rf3 Bb4+ Kb5 Bd2 Bg8 Bc1 
 13	 -2.35 	995106	0:00.07	Bf5 Bh2 Re7 Na3 Re4 Bg1 Rh4 Bf2 Rg4 Bb6 Kc6 Bf2 Rf4 Ba7 Kd5 Bg1 Re4 
 12	 -2.35 	966112	0:00.07	Bf5 Bh2 Re7 Na3 Re4 Bg1 Rh4 Bf2 Rg4 Bb6 Bd7 Ba7 Be6 Bf2 
 11	 -2.40 	451655	0:00.03	Bf5 Bh2 Rh7 Ne3+ Kc5 Be5 Be6 Bd4+ Kb5 Kb2 Rh3 Ka3 Rh4 c4+ Bxc4 
 10	 -2.33 	263851	0:00.02	Bf1 Na3 Re7 Bh2 Re4 Bb8 Be2 Ba7 Bg4 Kb2 Bf5 Bf2 Re7 Bb6 
  9	 -2.35 	144137	0:00.01	Bf1 Na3 Re7 Bh2 Re4 Bb8 Re6 Bh2 Re3+ Kb4 Re4+ Kc3 
  8	 -2.22 	42117  	0:00.00	Bf1 Na3 Be2 Be3 Re7 Bf4 Ke4 Bg5 
  7	 -2.32 	22517  	0:00.00	Bf1 Na3 Bg2 Nc4 Be4 Bd6 Bg6 
  6	 -2.45 	17721  	0:00.00	Bf1 Na3 Bg2 Be3 Ke4 Bc1 
  5	 -4.89 	5840    	0:00.00	Bf1 Bd6 Bxc4 Ba3 Be2 
  4	 -5.70 	3460    	0:00.00	Rf7 Nb6+ Ke4 Nxa4 Rxf4 
  3	 -7.31 	2804    	0:00.00	Rf7 Ne3+ Ke4 
  2	 -2.85 	1664    	0:00.00	Bf1 Nb2 Ke4 
  1	 -2.30 	778      	0:00.00	Bf1 Ne3+ Ke4 Nxf1 
  0	#
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