Lc0 Weird Endgame Play When Ahead in Material

[Alexander Tanseco]

When Lc0 (weights 42850 or 49921) is ahead in material, it plays the endgame irrationally. It gives up pieces and although it eventually wins, its winning style seems to be that of a drunkard. Is this a bug or is something wrong with my configuration. I use Aquarium 2019. See attached file.

[Event "[229] Nunn 2 (20). Lc0 v0.22.0 w49921 14cpu vs Lc0 v0.22.0 w42850 14cpu. 2+2 (27/08/2019)"]

[Site "Local computer"]

[Date "2019.08.27"]

[Round "11"]

[White "Lc0 v0.22.0 w49921 14cpu"]

[Black "Lc0 v0.22.0 w42850 14cpu"]

[Result "1-0"]

[Annotator "?"]

[BlackElo "0"]

[Classes "0"]

[ECO "B19"]

[GameID "0"]

[TimeControl "120+2"]

[WhiteElo "0"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5

Bh7 9. Bd3 Bxd3 10. Qxd3 Qc7 11. Bd2 Ngf6 12. O-O-O e6 13. Ne4 O-O-O 14. g3

Nxe4 15. Qxe4 Bd6 16. Qe2 Rhe8 17. Kb1 Nf6 18. Ne5 c5 19. Bc1 Nd5 20. Nc4 Bf8

21. dxc5 Bxc5 22. Rd3 Nb4 23. Bf4 Qc6 24. Rc1 f6 25. Rb3 b6 26. Be3 Nd5 27.

Bxc5 Qxc5 28. Ne3 Re7 29. Rd3 Qc6 30. Nxd5 Rxd5 31. Rxd5 Qxd5 32. Rd1 Qc6 33.

Qa6+ Qb7 34. Qd3 Qc7 35. a4 Kb7 36. a5 bxa5 37. Qb5+ Ka8 38. Qa4 a6 39. Qa3 e5

40. Rd5 Rd7 41. Rc5 Qb6 42. Rxa5 Rd1+ 43. Ka2 Kb7 44. Qf3+ Kc7 45. Qc3+ Kd7

46. f3 Ke7 47. g4 Kd7 48. Rc5 Rd4 49. Kb1 Rb4 50. b3 Qb7 51. Ka2 Rf4 52. Qd2+

Rd4 53. Qa5 Rf4 54. Kb2 Rxf3 55. Qa4+ Kd6 56. Ra5 Rf4 57. Rxa6+ Kd5 58. Qa5+

Ke4 59. Qe1+ Kf3 60. Qh1+ Kf2 61. Qxb7 Rb4 62. Qxb4 f5 63. gxf5 Kf3 64. Ra7

Kf2 65. Ra8 Kf3 66. Rb8 Kf2 67. Ra8 Kf3 68. c3 Kg2 69. c4 Kg3 70. c5 Kg2 71.

c6 g5 72. hxg6 h5 73. c7 Kg3 74. c8=N e4 75. Nb6 Kg2 76. Nd7 Kg3 77. Nc5 Kg4

78. Na6 Kg3 79. Nc7 Kg4 80. Nb5 Kg3 81. Nd6 Kg4 82. Nb7 Kg3 83. Na5 Kg4 84.

Nc6 Kg3 85. Na7 Kg4 86. Nc8 Kg3 87. g7 Kf3 88. Nb6 Kg2 89. Nd7 Kg3 90. Nc5 Kh2

91. Na6 Kg3 92. Nc7 Kf3 93. Nb5 Kg2 94. Na7 Kg3 95. Nc8 Kf3 96. g8=N Kg2 97.

Nb6 e3 98. Na4 Kf2 99. Nc5 Kg2 100. Na6 Kf2 101. Nc7 Kg2 102. Nb5 Kf2 103. Na7

Kg2 104. Nc6 Kg1 105. Na5 Kg2 106. Nb7 Kf2 107. Nd6 Kg2 108. Nb5 Kf2 109. Ka1

Kg2 110. Na3 Kg1 111. Nc4 Kf2 112. Na5 Kg2 113. Nc6 Kf2 114. Na7 Kg1 115. Nc8

Kg2 116. Nb6 Kf2 117. Na4 Kg2 118. Nc5 Kg1 119. Na6 Kg2 120. Nc7 Kf2 121. Nb5

Kg2 122. f6 Kf2 123. Nd6 Kg2 124. Nb7 Kf2 125. Nc5 Kg2 126. Na6 Kf2 127. Nc7

Kg1 128. Nb5 Kf2 129. Kb2 Kg1 130. Kc1 1-0

[Hoang-Hiep VU]

It is typical for lc0. 

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VU Hoang Hiep