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Up Topic The Rybka Lounge / Computer Chess / Stockfish 8 and Shredder lacks endgame knowledge.
- By rocket (***) [se] Date 2017-11-28 15:01 Edited 2017-11-28 15:03
58: Bxb5 leads to a theoretical draw. Rybka 4 knows this. As does Deep Fritz 10. 0.00 scores.

I thought Stockfish and Shredder had more endgame knowledge? Deep Shredder 11 does not recognize the drawn position either.

[Event "DESKTOP-M7G326U, Blitz:5'+3""]
[Site "DESKTOP-M7G326U"]
[Date "2017.11.28"]
[Round "1"]
[White "Deep Rybka 4.1 x64"]
[Black "Stockfish 8 64 POPCNT"]
[Result "1/2-1/2"]
[ECO "C41"]
[Annotator "0.50;0.47"]
[PlyCount "243"]
[TimeControl "300+3"]

{Intel(R) Celeron(R) CPU  N3050  @ 1.60GHz  W=27.1 plies; 33kN/s; 87 405 TBAs
B=29.2 plies; 879kN/s} 1. e4 {Black last book move} c6 2. d4 d6 3. Nc3 {White
last book move} Nd7 {0.47/21 14} 4. Nf3 {0.50/14 15 (f4)} e5 {0.49/22 10 (Ngf6)
} 5. Be2 {0.43/14 53 (a4)} Ngf6 {0.38/21 19} 6. O-O {0.44/13 7 (a4)} Be7 {0.28/
21 11} 7. a4 {0.39/13 37 (Qd3)} O-O {0.25/21 10} 8. a5 {0.40/13 9} exd4 {0.25/
21 17 (h6)} 9. Qxd4 {0.45/13 19 (Nxd4)} Re8 {0.34/19 11} 10. Rd1 {0.45/12 10
(h3)} Bf8 {0.26/20 4} 11. Be3 {0.45/12 7 (Bc4)} Qe7 {0.08/19 6} 12. Nd2 {0.43/
12 6} Nc5 {0.04/20 2 (Ne5)} 13. Bf3 {0.31/12 15} Ng4 {0.11/23 9} 14. Nc4 {0.22/
12 10} Nxe3 {0.19/20 2} 15. Qxe3 {0.22/14 12} Rd8 {0.02/22 7} 16. b4 {0.33/12 7
} Na6 {0.00/19 1 (Ne6)} 17. b5 {0.08/11 9} Be6 {0.00/22 7} 18. Nxd6 {0.12/11 8
(Qe2)} Nb4 {-0.09/21 7} 19. Nf5 {0.24/12 4} Qc7 {-0.26/20 7 (Qf6)} 20. b6 {0.
01/11 8} axb6 {-0.36/22 7} 21. axb6 {0.00/13 8} Qe5 {-0.26/22 2} 22. Rxa8 {0.
02/14 6} Rxa8 {-0.29/26 11} 23. Qd2 {0.02/14 10} Bxf5 {-0.34/23 3} 24. exf5 {
0.02/14 10} Qxf5 {-0.37/26 19} 25. Qd7 {0.00/14 5} Qxd7 {-0.31/24 9 (Qxc2)} 26.
Rxd7 {0.00/17 17} Ra1+ {-0.39/25 5 (Nd5)} 27. Nd1 {0.00/13 16} Nxc2 {-0.41/24 2
} 28. Kf1 {-0.48/11 4 (Rxb7)} g6 {-0.46/23 11} 29. Be4 {-0.47/12 3 (Rxb7)} Na3
{-0.44/24 11} 30. Ke1 {-0.47/13 8 (Bf3)} Bb4+ {-0.51/20 6} 31. Ke2 {-0.59/13 3}
Ra2+ {-0.49/23 10} 32. Kf1 {-0.59/14 21} Rd2 {-0.50/22 2} 33. Bxc6 {-0.59/14 3}
Rxd7 {-0.40/27 13} 34. Bxd7 {-0.67/15 4} Nc4 {-0.46/27 2} 35. Ne3 {-0.75/16 8}
Nxb6 {-0.39/29 18} 36. Bg4 {-0.75/17 7} Na4 {-0.39/28 3 (Bc5)} 37. Bc8 {-0.59/
14 6 (Bf3)} Nc5 {-0.43/26 6 (b6)} 38. Nd5 {-0.58/16 7} Ba3 {-0.47/25 3} 39. Nb6
{-0.59/15 3} Kg7 {-0.47/26 7} 40. Ke2 {-0.59/15 6} Kf6 {-0.47/25 3 (Bb4)} 41.
Nd7+ {-0.54/15 5} Nxd7 {-0.50/26 11} 42. Bxd7 {-0.54/16 6} Ke5 {-0.44/25 2} 43.
h4 {-0.52/16 5} Bd6 {-0.40/27 11 (f6)} 44. g3 {-0.53/17 7} f6 {-0.39/29 10} 45.
Ba4 {-0.53/16 3 (f4+)} Kd4 {-0.59/24 6 (Ke4)} 46. Be8 {-0.53/16 5 (Kd2)} Kc4 {
-0.53/28 8 (Kd5)} 47. Bf7+ {-0.53/17 5} Kc3 {-0.51/28 7} 48. Be8 {-0.54/17 3}
g5 {-0.49/25 1 (Kd4)} 49. hxg5 {-0.54/14 5 (h5)} fxg5 {-0.50/30 12} 50. Kf3 {
-0.58/15 3} Bc5 {-0.52/25 1} 51. Kg4 {-0.60/14 3 (Bd7)} Bxf2 {-0.59/32 12} 52.
Kxg5 {-0.66/16 2} Be3+ {-0.59/32 2} 53. Kf5 {-0.66/18 2 (Kf6)} Kd4 {-0.52/37 9
(Kc4)} 54. Ba4 {-0.66/19 5 (g4)} Kc4 {-1.04/28 3 (h6)} 55. Ke4 {-0.66/18 5
(Bc2)} Bg5 {-0.52/28 14} 56. Bc2 {-0.66/18 3 (Kf5)} b5 {-0.45/33 6 (h6)} 57.
Bd3+ {0.00/22 3} Kc5 {-0.45/36 1 (Kb4)} 58. Bxb5 {0.00/27 4 (Be2)} Kxb5 {-2.86/
35 3} 59. Kf3 {0.00/34 2 (Kf5)} Kc4 {-2.86/44 5 (h6)} 60. Kg4 {0.00/33 3 (Kg2)}
Be3 {-2.86/41 5 (Bd2)} 61. Kf3 {0.00/39 3 (Kh3)} Kd3 {-2.97/44 3 (Bg1)} 62. g4
{0.00/35 3} Bg5 {-2.87/29 1} 63. Kg2 {0.00/38 2 (Kf2)} Ke2 {-2.97/44 3 (Ke3)}
64. Kh3 {0.00/32 3 (Kg3)} Kf1 {-2.97/37 6 (h5)} 65. Kh2 {0.00/38 3} Kf2 {-2.97/
31 9 (Bf4+)} 66. Kh1 {0.00/48 3} Kg3 {-2.97/31 11 (Bf4)} 67. Kg1 {0.00/1 0}
Be3+ {-2.93/27 7 (Kxg4)} 68. Kh1 {0.00/45 3} Bd4 {-2.94/31 6} 69. g5 {0.00/8 0}
Bb2 {-2.87/38 5 (Be3)} 70. Kg1 {0.00/42 4} Ba3 {-2.87/34 4} 71. Kh1 {0.00/37 4}
Bf8 {-2.87/39 4} 72. Kg1 {0.00/43 4} Bc5+ {-2.85/26 1 (Kh4)} 73. Kh1 {0.00/44 4
} Kf3 {-2.87/42 4 (Kh3)} 74. Kh2 {0.00/34 4} Bb4 {-2.94/44 3 (Kf4)} 75. Kh3 {
0.00/28 4} Be1 {-2.85/27 1 (Ke3)} 76. Kh2 {0.00/37 3} Kg4 {-2.85/36 4} 77. Kg1
{0.00/42 3} Kf4 {-2.85/29 6 (Kxg5)} 78. Kg2 {0.00/39 3} Ba5 {-2.94/44 2 (Kxg5)}
79. Kh3 {0.00/33 3 (Kh1)} Bd8 {-2.94/48 4 (Kxg5)} 80. Kg2 {0.00/42 3 (Kh2)} Bb6
{-2.93/43 8 (Bxg5)} 81. Kh3 {0.00/34 4 (Kh2)} Bd4 {-2.93/42 4 (Kf3)} 82. Kg2 {
0.00/38 3} Kg4 {-2.93/35 1 (Kxg5)} 83. Kh2 {0.00/43 3} Kf3 {-2.93/45 3 (Ba1)}
84. Kh1 {0.00/35 3 (Kh3)} Bf2 {-2.93/46 8} 85. Kh2 {0.00/39 3} Kg4 {-2.94/47 3}
86. Kg2 {0.00/44 3} Bg3 {-2.94/48 16 (Kxg5)} 87. Kg1 {0.00/47 3 (Kh1)} Bc7 {-2.
94/46 9 (Kxg5)} 88. Kf2 {0.00/31 3 (Kg2)} Kh3 {-2.94/38 2} 89. Kg1 {0.00/37 2}
Bh2+ {-2.93/38 5 (Kh4)} 90. Kh1 {0.00/38 3} Bb8 {-2.93/40 3 (Kg4)} 91. Kg1 {0.
00/43 4} Kg3 {-2.93/28 0 (Kh4)} 92. Kh1 {0.00/39 3} Kg4 {-2.93/32 2} 93. Kg2 {
0.00/43 3} Bf4 {-2.93/40 3 (Kxg5)} 94. Kf1 {0.00/36 3 (Kg1)} Kh3 {-2.93/28 6
(Kxg5)} 95. Kg1 {0.00/44 3} Bb8 {-2.90/33 2 (Kg4)} 96. Kh1 {0.00/38 3} Kg3 {-2.
93/29 2} 97. Kg1 {0.00/37 3} Bc7 {-2.89/30 3} 98. Kh1 {0.00/39 3} Ba5 {-2.89/
29 0} 99. Kg1 {0.00/38 3} Bd2 {-2.93/33 8} 100. Kh1 {0.00/42 3} Bc3 {-2.93/32 4
} 101. Kg1 {0.00/42 3} Kh3 {-2.93/27 3} 102. Kh1 {0.00/43 3} Be5 {-2.86/26 3
(Kg4)} 103. Kg1 {0.00/40 5} Bg7 {-2.93/26 3} 104. Kh1 {0.00/47 2} Bf8 {-2.85/
22 3 (Kg4)} 105. Kg1 {0.00/45 3} Bc5+ {-2.85/24 3 (Kg4)} 106. Kh1 {0.00/41 3}
Kg4 {-1.70/23 4 (Bd4)} 107. Kg2 {0.00/44 3 (Kh2)} Bb4 {-2.19/22 3 (Kxg5)} 108.
Kh1 {0.00/44 3 (Kg1)} Kh5 {-2.17/20 3 (Kxg5)} 109. Kg2 {0.00/44 3} Kg6 {-1.59/
18 3 (Kxg5)} 110. Kg3 {0.00/35 3 (Kh2)} Bd6+ {-1.99/18 3 (Kf7)} 111. Kh3 {0.00/
39 3 (Kg2)} Kf5 {-1.61/22 3 (Bf8)} 112. Kg2 {0.00/43 3} Kg4 {-0.08/21 3 (Kf4)}
113. Kf2 {0.00/38 3 (Kg1)} Be7 {-0.08/27 2 (Kxg5)} 114. Kg1 {0.00/42 3 (Kg2)}
Kg3 {-0.08/28 2 (Bxg5)} 115. Kh1 {0.00/43 3} Kf2 {-0.08/27 0} 116. Kh2 {0.00/
40 3} Bxg5 {-0.08/30 3} 117. Kh1 {0.00/0 0} Kf3 {0.00/0 0} 118. Kg1 {0.00/0 0}
Bf4 {0.00/0 0} 119. Kh1 {0.00/0 0} h5 {0.00/0 0} 120. Kg1 {0.00/0 0} h4 {0.00/
0 0} 121. Kh1 {0.00/0 0} Kg3 {0.00/0 0} 122. Kg1 {0.00/0 0 Draw accepted}
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Up Topic The Rybka Lounge / Computer Chess / Stockfish 8 and Shredder lacks endgame knowledge.

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