Playing the endgame like a boss !!

[glennsamuel32]

CCC 6
lc0 vs Stockfish
Game 54

[pgn][Event "CCC 6: The Winter Classic Final (10|10)"] [Site "?"] [Date "2019.03.11"] [Round "1"] [White "Lc0"] [Black "Stockfish"] [Result "1-0"] [ECO "C40"] [GameDuration "00:50:41"] [GameEndTime "2019-03-11T09:03:58.223 PDT"] [GameStartTime "2019-03-11T08:13:17.039 PDT"] [Opening "Latvian counter-gambit"] [PlyCount "485"] [TimeControl "600+10"] 1. e4 e5 2. Nf3 f5 3. Nxe5 Qf6 4. Nc4 fxe4 5. Nc3 Qf7 6. Ne3 d5 7. Nexd5 c6 8. Ne3 Nf6 9. f3 exf3 10. Qxf3 Bc5 11. b3 Qe7 12. Be2 Nbd7 13. Nf5 Ne5 14. Nxe7 Nxf3+ 15. Bxf3 Bxe7 16. Bb2 Bg4 17. Rf1 Bxf3 18. Rxf3 O-O-O 19. h3 Rhe8 20. O-O-O Bc5 21. Rdf1 Re7 22. Kd1 Be3 23. Bc1 Bd4 24. Re1 Rxe1+ 25. Kxe1 Re8+ 26. Kd1 Be5 27. Ne2 c5 28. d3 Kd7 29. c4 Kc6 30. Re3 g6 31. Ng1 Ba1 32. Nf3 Rxe3 33. Bxe3 a6 34. Ng5 Kd6 35. Ke2 Bb2 36. Bf4+ Ke7 37. Kf3 b6 38. Bd2 Ba3 39. Ne4 Nd7 40. Nc3 Bb2 41. Nd5+ Kd6 42. Ke4 Kc6 43. Bf4 Nf6+ 44. Nxf6 Bxf6 45. Be5 Be7 46. Bg7 Bd6 47. Bf6 Bc7 48. Be5 Bd8 49. Bc3 Bc7 50. Bf6 Bg3 51. Bc3 Bd6 52. Bg7 Bg3 53. Bb2 Kd6 54. Bf6 Kc6 55. Bc3 h5 56. Bd2 Bc7 57. Be3 Bd6 58. d4 cxd4 59. Bxd4 Bg3 60. Bb2 Bd6 61. Bc1 Bc7 62. Ba3 Bg3 63. Bb4 a5 64. Be7 Bb8 65. Ba3 Bc7 66. Be7 Bb8 67. Bf8 Bc7 68. Kd4 Bf4 69. Ba3 Bb8 70. Bc1 Bc7 71. Bd2 Bh2 72. Ke4 Bd6 73. Be3 Bc7 74. Bd4 Bd6 75. Bf2 Bb8 76. Be1 Kc5 77. Kd3 Bc7 78. Bc3 a4 79. bxa4 Bd8 80. Bd2 Kd6 81. Be3 Kc6 82. Ke4 Bc7 83. Bd4 Bg3 84. Bc3 Kc5 85. Kd3 Bc7 86. Bd2 Bd8 87. a3 Kd6 88. Bb4+ Kc6 89. Kd4 Bf6+ 90. Ke4 Bb2 91. Kd3 Kb7 92. Kc2 Bf6 93. a5 bxa5 94. Bxa5 Kc6 95. Bb4 h4 96. a4 Bd4 97. a5 Be5 98. Be7 Bc7 99. a6 Bb8 100. Bg5 Bc7 101. a7 Kb7 102. Kd3 Bg3 103. Be3 Bc7 104. Ke4 Bd8 105. Kd5 Bc7 106. c5 Kxa7 107. Kc6 Bb8 108. Kd7 Ka6 109. c6 Kb5 110. Bg5 Kc4 111. Bxh4 Bh2 112. Bg5 Kd5 113. Bh6 Bb8 114. Bg7 Ke4 115. Bf8 Ke5 116. Bh6 Kf5 117. Bf8 Ke5 118. c7 Bxc7 119. Kxc7 Ke4 120. Kb8 Ke3 121. g4 Kf4 122. g5 Kxg5 123. Be7+ Kf5 124. h4 Ke6 125. Bd8 Kd7 126. Bg5 Kd6 127. Kc8 Kc6 128. Kd8 Kd6 129. Ke8 Ke6 130. Kf8 Ke5 131. Kg7 Kf5 132. Kh6 Ke4 133. Kxg6 Kd3 134. Kf5 Kd4 135. h5 Kc3 136. Kg4 Kd3 137. Kg3 Ke4 138. h6 Kd5 139. Bf4 Ke6 140. Kh2 Kf6 141. Bc1 Kf7 142. Kg2 Kg6 143. Kf2 Kf6 144. Ke2 Kf7 145. Kd1 Kg6 146. Kc2 Kf6 147. Kb2 Kf7 148. Ka3 Kg6 149. Kb4 Kf6 150. Kc5 Kg6 151. Kd6 Kf6 152. Kc7 Kg6 153. Kb8 Kf7 154. Bd2 Kf6 155. Ka7 Kg6 156. Ka6 Kf6 157. Kb5 Kg6 158. Kc4 Kf7 159. Kd3 Kg6 160. Ke2 Kf6 161. Ke1 Kf7 162. Kd1 Kg8 163. Kc2 Kf7 164. Kb2 Kf6 165. Bg5+ Kf7 166. Bf4 Kf8 167. Kb1 Kg8 168. Bc1 Kf7 169. Ka2 Kf6 170. Ka1 Kf7 171. Be3 Kg6 172. Kb2 Kh7 173. Kc3 Kg6 174. Kd4 Kf6 175. Bg5+ Kf7 176. Kd3 Kf8 177. Bf4 Kf7 178. Ke3 Kg6 179. Ke4 Kf6 180. Kf3 Kf7 181. Kg4 Kg6 182. Kh4 Kf6 183. Kh5 Kf7 184. Be5 Kg8 185. Kg6 Kf8 186. h7 Ke7 187. Ba1 Kd6 188. Bc3 Kd5 189. Kf5 Kc4 190. Kf4 Kxc3 191. Kg4 Kb4 192. Kg3 Kb5 193. Kg2 Kc6 194. h8=R Kc5 195. Kf1 Kd5 196. Ra8 Ke6 197. Ra2 Kd6 198. Ke1 Kc5 199. Ra4 Kd5 200. Kd1 Ke6 201. Re4+ Kd5 202. Re3 Kc4 203. Ke1 Kd5 204. Rb3 Kd4 205. Rb2 Kd5 206. Rb1 Ke6 207. Kf1 Kd5 208. Kg1 Ke4 209. Rb8 Ke5 210. Rb7 Kd6 211. Rb4 Kc5 212. Rh4 Kd6 213. Rh3 Ke5 214. Rh6 Kf5 215. Rc6 Ke4 216. Ra6 Kd5 217. Ra5+ Kc6 218. Ra3 Kc5 219. Rd3 Kc4 220. Rd2 Kc3 221. Rg2 Kd4 222. Kh1 Ke4 223. Rg7 Ke5 224. Ra7 Kd5 225. Ra8 Kd4 226. Ra5 Ke4 227. Kg2 Kf4 228. Kf2 Ke4 229. Ra4+ Ke5 230. Ke3 Ke6 231. Rd4 Ke5 232. Re4+ Kd5 233. Kd3 Kc5 234. Rd4 Kb5 235. Rc4 Kb6 236. Kc3 Kb5 237. Kb3 Ka6 238. Rb4 Ka5 239. Kc4 Ka6 240. Kc5 Ka5 241. Rd4 Ka6 242. Rd7 Ka5 243. Ra7# 1-0[/pgn]

[xr_a_y]

What the hell is this thing ? is lc0 really played so bad at the end ?

[mwyoung]

What the hell is this thing ? is lc0 really played so bad at the end ?

Playing bad? Lc0 won the game with Lc0's epic trolling endgame play. Promoting to a rook, sacing the bishop. Sweet.

[supersharp77]

What the hell is this thing ? is lc0 really played so bad at the end ?

Playing bad? Lc0 won the game with Lc0's epic trolling endgame play. Promoting to a rook, sacing the bishop. Sweet.

E4-E5 Nf3 F5?!.....Your kidding..Right? Result is meaningless...How did Stockfish exactly get one pawn down?

[jp]

Why is it doing that when it has tablebases?
Tablebases years ago made normal engines do weird things, but not like this.

[ernest]

+1 !

Probably did not have tablebases, or ???...

[hgm]

It certainly would not play like this even if it had only 3-men EGT (as KRK would be amongst those). This is just what you get if you train the engine to recognize a certain win, but do not train it how to make progress in cashing it. It is equally happy with any KRK position, they are all 100% certain wins. So the pieces just diffuse aimlessly over the board.

[jp]

CCC claim they use 7-man Syzygy TBs.
Wonder if there's some error somewhere.

[hgm]

That CCC uses 7-men EGT doesn't mean that this particular engine supports uses EGT. Obviously CCC was not using the EGT to adjudicate.

[M ANSARI]

The sad truth is that there are just way too many games like that with Lc0 and while in this case the end result was still a win for Lc0 … on many occasions there is a draw or even a loss, in what was a winning position. It is behaviour like this that makes Lc0 useless as a stand alone chess engine to analyse with. This needs to be fixed pronto!