TCEC Season 15 Superfinal Game 36 – Leela-Stockfish
|Game||Season 15, Superfinal, Game 36|
|Links|| TCEC archive|
In this game Leela played as white against Stockfish. Leela was able to take control of the game soon after the opening phase. With a strong knight on an outpost square, black's play was restricted. This allowed Leela to use a slow plan with a king walk to break through on the queenside.
|Position after 14... b5|
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Be7 9. Qd2 O-O 10. O-O-O Qc7 11. g4 Rc8
End of book moves.
12. g5 Nh5 13. Rg1 Nd7 14. Kb1 b5 (diagram)
Both Kingscrusher and ChessNetwork point out that c6 is weakened after 14... b5. After white plays 15. Nd5, black is practically forced to take with 15... Bxd5 and white gets a nice anchor square on c6 for the knight on b3 to land later.
|Position after 47... Nb5+|
15. Nd5 Bxd5 16. exd5 Nb6 17. Na5 g6
The beauty of high level computer chess is often in the moves not played. As both analysts points out, black is ill-advised to take a pawn with 17... Nxd5 18. Qxd5 Qxa5, because 19. Bc4 would be dangerous. The bishop cannot be taken: 19... bxc4 would hang the queen and 19... Rxc4 would hang the rook on a8.
18. Rg4 Rab8 19. c4
An interesting move allowing black to open both the b-file and the c-file. But black cannot take advantage of the opened files. Neither does black have the light-squared bishop to poke the king on the newly opened diagonal.
19... Nxc4 20. Bxc4 bxc4 21. Rxc4 Qd7 22. Nc6
White now claiming the c6 square for knight.
22... Ra8 23. Qg2 Bf8 24. Qg4 Qe8 25. a4 f5 26. Qg2 Qd7 27. Ka2
White begins the king walk.
27... Re8 28. Rb4 f4 29. Bf2 Qf5 30. a5 Kh8 31. Qg4
White is eager to exchange the queens, but black does not comply. White will now slowly improve the piece positions and advance the king and the remaining pawns. Black's active pieces are the knight and the queen, but they cannot achieve coordination. Black is destined wait for white's actions to take place.
31... Qc2 32. Qg1 Qf5 33. Qg4 Qc2 34. Qg1 Qf5 35. Qg2 Kg8 36. Be1 Ng7 37. h4 Nh5 38. Ka3 Bg7 39. b3 Qd7 40. Bf2 Bf8 41. Rc4 Ng7 42. Qf1 Nf5 43. Qe2 Bg7 44. Rb4 Nd4 45. Qe4 Qf7 46. Rc1 Kh8 47. Rcc4 Nb5+ (diagram)
Black attempts to close the queenside, but white is prepared to sacrifice the rook for a knight and a pawn. As compensation, white gets strong connected queenside passed pawns.
|Position after 63. b6|
48. Rxb5 axb5 49. Rc2 Qb7 50. Kb4 Bf8 51. Qd3 Kg7 52. Qxb5 Qd7 53. Ka4 Qh3 54. Qe2 Qh1 55. b4 Kf7 56. Kb5 Be7 57. a6 h6 58. a7 hxg5 59. hxg5 Bxg5 60. Ka6 Qh3 61. b5 Qc8+ 62. Ka5 Bd8+ 63. b6 (diagram)
Black is forced to sacrifice a piece to prevent the pawns from queening immediately. But the position already seems hopeless.
63... Bxb6+ 64. Bxb6 Qd7 65. Qd3 Kf6 66. Rg2 Rg8 67. Rh2 Kg7 68. Ka6 Rgf8 69. Rg2 Qc8+ 70. Ka5 Rf6 71. Rg1 Kh7 72. Kb5 Qb7 73. Ka5 Kh8 74. Rb1 Kh7 75. Bf2 Qc7+ 76. Bb6 Qd7 77. Rh1+ Kg7 78. Rg1 Qb7 79. Qa6 Qf7 80. Qc4 Qb7 81. Qd3 Kh6 82. Qa6 Qxa6+ 83. Kxa6 Rf7 84. Na5 Rc8 85. Nb7 Ra8 86. Nxd6 Rd7 87. Ne4 Rxd5 88. Kb7 Rf8 89. Ra1 Kg7 1-0
The game was adjudicated as white win. 90. a8=Q would easily win here.