Avoid moving pawns, because they cannot go backwards.
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[Event "ECO MegaMatch II! (1|1)"]
[Site "?"]
[Date "2020.05.20"]
[Round "1"]
[White "Lc0-dev"]
[Black "Stockfish"]
[Result "1-0"]
[BlackElo "0"]
[ECO "C64"]
[TimeControl "60+1"]
[WhiteElo "0"]
{ Two chess computer engines at the top of their game square off at the
Computer Chess Championship. Stockfish as black plays a normal-seeming
opening. Leela seems to say, so you have chosen death.|Leela Chess Zero (Lc0)
is a machine-learning chess engine. It won the Computer Chess Championship in
December 2019, and made history as the first neural-network project to take
the title. Only time will tell if Lc0 can defend it crown as the world
champion computer engine against constantly innovating calculation-based
engines like Stockfish.|This game is one of the finest ever played. LC0
sacrificed a bishop for only a strategic advantage, and then seemed to toy
with Stockfish in the endgame before finishing it off in more than 100
moves. } 1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 Bb6 5. d4 exd4 { More common is
Nf6 leading into a drawish line. Both sides are playing for a win. } 6. cxd4 Nce7 { Black's knight does not wait for a poke from d5. } ( { Black can try: } 6... d5 7. O-O dxe4 ( { Black can try: } 7... Ne7 8. exd5 Nxd5 9. Re1+ Be6 10. Bg5 Qd6 11. Nbd2 h6 12. Ne4 Qb4 13. Bxc6+ bxc6 14. Bd2 Qe7 15. a4 a5 16. Ne5 Qh4 17. Ra3 O-O 18. Qc1 Rfe8 19. Rg3 ) 8. d5 exf3 9. dxc6 Qxd1 10. cxb7+ c6 11. Bxc6+ Kf8 12. Rxd1 Rb8 13. bxc8=Q+ Rxc8 14. Bxf3 { White wins with a large
material advantage. } ) 7. O-O c6 { A logical move even from a human
perspective. After the bishop moves then black will play d5 with a good
game.|However, c6 is the losing move, but do you see why? } 8. d5 { What is
this? A strategic piece sacrifice on only the 8th move! Now Leela Chess Zero
is rewriting the chess opening book. } 8... cxb5 ( { Black can try: } 8... cxd5 9. exd5 Nf6 10. d6 Nc6 11. Re1+ Kf8 12. Bc4 h6 13. Ne5 Nxe5 14. Rxe5 Kg8 15. Re7 Rh7 16. Bxf7+ Kf8 17. Bg6 Bc5 18. Qb3 Qxe7 19. dxe7+ Bxe7 20. Qf7# ) 9. d6 Nc6 10. e5 { Black is a piece up, but unable to develop. } 10... Kf8 { A move designed
to allow black's queen to move to e8. } ( { Black can try to prevent the Nc3-d5
with threats of Bg5 etc. } 10... b4 11. a3 bxa3 12. b4 Nxb4 13. Bg5 f6 14. exf6 gxf6 15. Ne5 Kf8 16. Qh5 Qe8 17. Bh6+ Nxh6 18. Qxh6+ Kg8 19. Rxa3 Qxe5 20. Rg3+ Qxg3 21. hxg3 Bd4 22. Nd2 b6 23. Re1 Be5 24. f4 Bb7 25. fxe5 Re8 26. Qxf6 Re6 27. Qd8+ Kg7 28. Qxd7+ Kh6 29. Qxe6+ { White wins with a large
material advantage. } ) ( { Black can try to prevent Bg5: } 10... h6 11. Nc3 Ba5 12. Nd5 Rb8 13. Qd3 a6 14. Qe4 b4 15. b3 b5 16. Bb2 Bb7 17. Qg4 Rh7 18. Rfe1 Kf8 19. Nf4 g6 20. Rad1 Bb6 21. e6 dxe6 22. Nh4 g5 23. Nxe6+ fxe6 24. Ng6+ Ke8 25. Qxe6+ Qe7 26. dxe7 Ngxe7 27. Qg8# ) 11. Nc3 Qe8 12. Re1 h6 13. Nd5 Bd8 14. b4 { A move designed to lock up the queen side. } 14... a6 15. Be3 h5 { A
move designed to allow Nh6 development. } 16. Bb6 { A move designed to remove
black's only influence over the dark squares. } 16... Nxb4 { Typical stockfish razzle
dazzle. } 17. Nf6 { The knight cannot be taken without losing black's queen. } 17... gxf6 18. exf6 Qxe1+ 19. Qxe1 Bxf6 ( { Black can try: } 19... Bxb6 20. Qxb4 Bd8 21. Re1 Bxf6 22. Nh4 b6 23. Qe4 Rb8 24. Qe8+ Kg7 25. Nf5+ Kg6 26. Qe4 Bb7 27. Qc2 Kh7 28. Ng3+ Kg7 29. Qc7 Nh6 30. Nxh5+ Kg6 31. Nxf6 Kxf6 32. Qxd7 Nf5 33. h3 Rhg8 34. g4 Nd4 35. Kf1 Kg7 36. Qe7 Nf3 37. Re6 Bc8 38. Qf6+ Kh7 39. Qh6# ) 20. Qxb4 { White again sacrifices major material to maintain the
initiative. } 20... Bxa1 21. Ng5 h4 { A mysterious stockfish move probably designed
to prevent white from playing h4 in support of the knight. } 22. Qb3 { Threatening mate on f7. } 22... Nh6 23. Qd1 Bg7 ( { Black can try: } 23... Bf6 24. Bd4 Bxd4 25. Qxd4 Kg8 26. Ne4 f5 27. Nf6+ Kf7 28. Nd5 Rh7 29. Qf6+ Kg8 30. Ne7+ Rxe7 31. dxe7 Kh7 32. e8=Q Ng8 33. Qeg6# ) 24. Qe2 Bf6 25. Ne4 Ba1 26. Qe1 Bg7 27. Qe3 Ng8 28. Qg5 f6 29. Qg6 Rh6 30. Qf5 Kf7 31. Ng5+ Kf8 32. Nf3 h3 33. g4 Bh8 34. g5 Rh5 35. Be3 b6 36. Ne5 Rb8 37. Kf1 b4 38. Qg6 fxe5 39. Qxh5 Bb7 ( { Black can try: } 39... Bg7 40. Qf3+ Ke8 41. Qd5 Kf8 42. g6 Nh6 43. Bxh6 Ke8 44. Qg8+ Bf8 45. Qxf8# ) 40. Qxh8 Bg2+ 41. Ke1 Be4 42. g6 { Clearing the dark squares for white's bishop. } 42... Bxg6 { Q } 43. Qxh3 { Black
cannot allow d7 to fall. } 43... Nf6 ( { Black can try: } 43... Ke8 44. Qg4 Bf7 45. Qg7 Rc8 46. Bh6 Nxh6 47. Qxh6 Rc6 48. Qh8+ Bg8 49. Qxg8# ) 44. Qh8+ Kf7 45. Qxb8 { The rest is just technique. White wins with a large material
advantage. } 45... Nd5 46. Qb7 Ke6 47. Bxb6 Bd3 { Any human player would just push
the h-pawn for a win. This AI seem to love to torture it opponent. } 48. f4 Nxf4 49. Be3 Nd5 50. Kd2 Bc4 51. Qc8 Bb5 52. Qg8+ Kxd6 53. Qg6+ Kc7 54. Ba7 Bc6 55. Qg8 Kd6 56. Qf8+ Ke6 57. Qh6+ Nf6 58. Qh3+ Kf7 59. Qf5 d6 60. Kc1 Ke7 61. Qc8 Bb5 62. Qc7+ Ke6 63. Bb8 Ne8 64. Qa5 b3 65. axb3 Ke7 66. Bxd6+ Kxd6 67. Qd2+ Ke6 68. Qh6+ Nf6 69. Qg6 Bc6 70. Qd3 Bb5 71. Qf3 e4 72. Qf4 Be2 73. Kd2 Bg4 74. Ke1 Bh3 75. Qh4 Bf5 76. Qh6 Kf7 77. Qf4 Ke6 78. Qf1 Ke5 79. Qxa6 Nh7 80. Qa5+ Kf6 81. h3 Ke6 ( { Black dare not try: } 81... Bxh3 82. Qc3+ Kg5 83. Qxh3 { White wins with a large material advantage. } ) 82. Ke2 Nf6 83. Ke3 Bg6 ( { Black dare not try: } 83... Bxh3 84. Kd4 Nd7 85. Qd5+ Ke7 86. Qg5+ Kf7 87. Qh5+ Ke7 88. Qxh3 { White wins with a large material advantage. } ) 84. Qg5 Bh5 85. b4 Bf3 86. b5 Nd7 87. b6 Ne5 { A fl } 88. Qxe5+ { A flashy and
unnecessary sacrifice seemingly just to torture black. } 88... Kxe5 89. b7 Ke6 90. h4 Bh5 91. Kxe4 Kd7 92. b8=Q Kc6 93. Ke3 Bg4 94. h5 Bxh5 95. Qe5 Bd1 96. Kd2 Bb3 97. Qc3+ { LC0 is done playing with its food. } 97... Kd6 98. Qxb3 Kd7 99. Qf3 Ke6 100. Qc6+ Kf7 101. Kd3 Kg7 102. Ke4 Kh8 103. Qd7 Kg8 104. Ke5 Kf8 105. Kf6 Kg8 106. Qg7# 1-0