Obsidian v10 NN draws but could easily win

[tissatussa]

it happened in a 15 min game (using CuteChess GUI on Xubuntu 22.04) :

Obsidian v10 NN could easily win this position but failed .. its last few moves were done almost instantly !?

replay the game

[Event "engine vs engine from fixed starting position"]
[Site "Holland"]
[Date "2024.04.08"]
[Round "?"]
[White "Obsidian v10.0 NN"]
[Black "4ku v4.0"]
[Result "1/2-1/2"]
[FEN "rnbqkb1r/ppp2ppp/5n2/3pp3/8/3PP3/PPPNNPPP/R1BQKB1R b KQkq - 3 4"]
[GameDuration "00:39:00"]
[SetUp "1"]
[TimeControl "900+3"]

1... Be7 {+0.58/24 37s} 2. g3 {-0.44/26 34s} c5 {+0.59/27 32s}
3. Bg2 {-0.30/26 25s} Nc6 {+0.47/26 30s} 4. O-O {-0.26/26 33s}
O-O {+0.57/25 28s} 5. b3 {-0.41/26 55s} Qc7 {+0.50/25 32s} 6. Bb2 {-0.27/26 26s}
h6 {+0.34/25 58s} 7. d4 {-0.07/27 39s} cxd4 {+0.41/25 24s}
8. exd4 {-0.02/26 17s} Bg4 {+0.38/28 25s} 9. dxe5 {+0.10/30 26s}
Nxe5 {+0.33/29 26s} 10. h3 {+0.14/30 15s} Bh5 {+0.16/30 41s}
11. Bxe5 {+0.11/31 55s} Qxe5 {+0.08/28 30s} 12. Nf3 {+0.08/30 17s}
Bxf3 {+0.05/28 27s} 13. Bxf3 {+0.08/27 14s} Rfd8 {+0.15/27 20s}
14. Qd3 {+0.03/31 43s} Rac8 {0.00/25 30s} 15. Kg2 {0.00/32 33s} a6 {0.00/26 45s}
16. Rad1 {+0.08/31 39s} Qb2 {+0.01/29 16s} 17. c3 {+0.08/31 14s}
Qxa2 {0.00/34 15s} 18. Ra1 {+0.12/32 18s} Qxb3 {0.00/40 17s}
19. Rfb1 {+0.12/31 13s} Qc4 {0.00/39 20s} 20. Qxc4 {+0.05/34 16s}
Rxc4 {0.00/39 15s} 21. Rxb7 {+0.05/31 13s} Bd6 {0.00/40 33s}
22. Rxa6 {+0.08/34 34s} Be5 {0.00/39 12s} 23. Raa7 {+0.01/31 15s}
Rf8 {0.00/35 14s} 24. Rb3 {+0.05/33 76s} Rfc8 {0.00/39 20s}
25. Rb5 {+0.08/32 18s} Rd8 {0.00/40 13s} 26. Rbb7 {+0.05/30 19s}
Rf8 {0.00/48 12s} 27. Ra3 {+0.05/31 29s} Rfc8 {0.00/38 11s}
28. h4 {+0.06/31 13s} Bxc3 {+0.19/31 11s} 29. Nf4 {+0.04/30 10s}
Rd8 {+0.43/30 10.0s} 30. Rb5 {+0.07/30 7.4s} d4 {+0.28/32 12s}
31. Nd3 {+0.20/33 10s} Rc7 {+0.49/31 10s} 32. Ra6 {+0.20/34 9.0s}
Re8 {+0.48/29 11s} 33. h5 {+0.15/33 20s} Rce7 {+0.51/29 10s}
34. Rc5 {+0.15/36 8.5s} Rb8 {+0.53/29 8.7s} 35. Rcc6 {+0.15/38 6.8s}
Kf8 {+0.51/29 9.1s} 36. Rc4 {+0.15/37 6.5s} Ne4 {+0.50/27 15s}
37. Rca4 {+0.15/35 8.2s} Rbe8 {+0.51/28 11s} 38. Ra8 {+0.15/38 7.4s}
Nd6 {+0.31/28 9.0s} 39. Rxe8+ {+0.24/30 7.3s} Rxe8 {0.00/30 9.8s}
40. Bd5 {+0.21/31 11s} Rb8 {+0.46/28 8.4s} 41. Ra6 {+0.12/33 24s}
Nc8 {+0.39/28 7.1s} 42. Bf3 {+0.12/30 7.9s} Ke7 {+0.26/26 8.4s}
43. Rc6 {+0.10/32 13s} Nd6 {+0.27/26 9.3s} 44. Ra6 {+0.10/33 12s}
Rd8 {+0.28/28 6.8s} 45. Bd1 {+0.08/32 48s} Ne4 {+0.55/27 61s}
46. Ba4 {+0.16/29 7.6s} Rb8 {+0.49/24 4.4s} 47. Ra7+ {+0.13/29 9.0s}
Kf8 {+0.47/26 8.1s} 48. f4 {+0.17/31 15s} Nd6 {+0.51/24 4.3s}
49. Kf3 {+0.19/29 14s} Rb7 {+0.45/25 4.1s} 50. Ra6 {+0.19/28 3.0s}
Nc4 {+0.25/26 9.8s} 51. Nc5 {+0.09/29 9.7s} Rb1 {0.00/26 3.8s}
52. Ra8+ {+0.26/25 3.7s} Ke7 {0.00/28 4.2s} 53. Ra7+ {+0.21/28 6.9s}
Kd6 {0.00/28 4.0s} 54. Nd3 {+0.23/26 4.4s} Ra1 {0.00/26 3.6s}
55. Rd7+ {+0.14/25 2.9s} Ke6 {0.00/30 5.1s} 56. Nc5+ {+0.15/26 3.8s}
Kf6 {0.00/32 3.9s} 57. Bb5 {+0.14/28 4.7s} Nd2+ {0.00/25 4.0s}
58. Kg4 {+0.31/25 5.4s} Nf1 {0.00/27 3.5s} 59. Rb7 {+1.03/24 4.1s}
Re1 {-0.27/27 9.7s} 60. Bd3 {+0.74/23 3.5s} Nd2 {-0.12/28 4.2s}
61. Bf5 {+1.07/24 2.0s} Re3 {-0.49/25 3.2s} 62. Nd7+ {+1.21/27 3.2s}
Ke7 {-1.57/27 3.3s} 63. Ne5+ {+1.48/26 2.4s} Ke8 {-1.49/29 4.1s}
64. Bd3 {+2.05/30 6.6s} Ne4 {-1.43/30 4.3s} 65. Bb5+ {+2.36/26 3.1s}
Kf8 {-1.39/28 3.3s} 66. Rb8+ {+1.94/26 3.6s} Ke7 {-0.58/29 3.2s}
67. Re8+ {+2.06/28 2.4s} Kd6 {-0.46/28 3.5s} 68. Nc4+ {+2.19/26 1.8s}
Kc7 {-1.51/29 4.4s} 69. Re7+ {+2.30/25 3.0s} Kd8 {-1.68/29 18s}
70. Rd7+ {+2.23/28 3.3s} Kc8 {-1.67/28 3.2s} 71. Rxf7 {+2.22/27 2.4s}
Re1 {-1.65/29 4.5s} 72. Ne5 {+2.31/28 3.1s} d3 {-2.36/22 2.6s}
73. Bxd3 {+2.41/26 2.0s} Nf2+ {-2.00/26 2.4s} 74. Kf5 {+2.50/28 2.4s}
Nxd3 {-2.26/27 2.5s} 75. Nxd3 {+2.60/28 2.5s} Re3 {-2.27/26 2.7s}
76. Nc5 {+2.70/30 3.1s} Kd8 {-2.54/27 6.9s} 77. g4 {+2.71/27 3.3s}
Re7 {-2.78/26 2.4s} 78. Rf8+ {+2.82/28 2.7s} Kc7 {-2.02/22 2.4s}
79. Ra8 {+2.87/28 3.0s} Kc6 {-2.27/22 2.6s} 80. Ne6 {+3.23/24 2.7s}
Kd6 {-2.70/23 2.4s} 81. Ra3 {+3.71/23 2.2s} Bb2 {-3.02/27 3.5s}
82. Rd3+ {+5.52/23 2.8s} Kc6 {-3.16/27 3.0s} 83. Rb3 {+5.90/24 3.0s}
Ba1 {-2.84/27 2.5s} 84. Ra3 {+6.20/25 3.0s} Bf6 {-5.60/26 4.7s}
85. g5 {+6.60/23 3.7s} hxg5 {-5.95/29 4.1s} 86. fxg5 {+6.80/23 2.6s}
Bb2 {-7.46/30 16s} 87. Ra2 {+7.19/26 2.8s} g6+ {-7.93/29 2.7s}
88. hxg6 {+7.50/28 4.0s} Bh8 {-8.01/30 2.0s} 89. Ra8 {+7.62/27 3.0s}
Bb2 {-8.32/29 2.1s} 90. Rb8 {+7.63/33 3.8s} Ba1 {-8.43/29 2.1s}
91. Rg8 {+7.64/36 2.8s} Kd6 {-8.51/30 2.4s} 92. g7 {+8.19/28 2.1s}
Bxg7 {-8.60/31 2.0s} 93. Rxg7 {+9.07/31 2.4s} Re8 {-10.86/32 12s}
94. Rh7 {+10.69/27 2.6s} Rb8 {-10.86/32 1.9s} 95. g6 {+17.74/21 3.6s}
Rg8 {-17.79/30 18s} 96. g7 {+27.50/25 2.3s} Kd5 {-299.64/29 2.5s}
97. Rh8 {+107.19/45 5.6s} Rxg7 {-299.64/31 1.5s} 98. Nxg7 {+M115/41 2.5s}
Kd4 {-299.84/29 1.8s} 99. Rh3 {+M115/1 0s} Kc5 {-299.88/29 1.5s}
100. Rh4 {+M111/1 0s} Kd5 {-299.89/31 1.6s} 101. Ne6 {+M99/1 0s}
Kc6 {-299.90/34 2.8s} 102. Rd4 {+M49/1 0s} Kb5 {-299.92/30 1.6s}
103. Rh4 {+M53/1 0s} Kc6 {0.00/127 0.006s} 104. Rd4 {+M49/1 0s}
Kb5 {0.00/127 0.007s} 105. Rh4 {+M53/1 0s}
Kc6 {0.00/127 0.008s, Draw by 3-fold repetition} 1/2-1/2

[xu-shawn]

It seems that the engine is under severe time pressure. I'd recommend you test with a small increment (0.1s) to ensure that this doesn't happen.

[tissatussa]

It seems that the engine is under severe time pressure. I'd recommend you test with a small increment (0.1s) to ensure that this doesn't happen.

This is not true. At that moment the engine had 34 seconds to finish the game (see remaining time in screenshot) and it was a 900+3 game.