Literary Theory

Leela Chess Zero – AllieStein
Top Chess Engine Championship Season 17 — Division P; tcec-chess.com, April 7, 2020
Modern Defence A42

1. c4 g6 2. d4 Bg7 3. Nc3 d6 4. e4 Nc6 5. Be3 e5 6. d5 Nce7 7. g4 f5 8. gxf5 gxf5 9. Qh5+ Kf8 10. 0-0-0 f4 11. Bd2 Nf6 12. Qe2 Rg8 13. Bh3 b6 14. Kb1 h6 15. Bxc8 Qxc8 16. Be1 Nh7 17. h4 Bf6 18. f3 Rg6 19. Nh3 Kg8 20. Qf1 Qd7 21. Rd2 Kh8 22. Nf2 h5 23. Nb5 Kg7 24. Nh3 Kh6 25. Rdh2 Rg7 26. Bd2 Ng6 27. Nc3 Nhf8 28. Ne2 Kh7 29. Bc3 Qd8 30. Ng5+ Kh6 31. a3 Qe7 32. Nh3 Kh7 33. Ng5+ Kh6 34. Bd2 Re8 35. Ka2 a6 36. Nh3 Kh7 37. Ng5+ Kh6 38. Bc3 Rc8 39. Qc1 Rd8 40. Bd2 Rd7 41. Qf1 Rg8 42. Be1 a5 43. Qh3 Qe8 44. Qf5 Bd8 45. Bf2 Nh7? So as it went AllieStein came out quite badly from its neural wanderings, but its last move makes things irreversibly worse. Comparatively best was 45. ... Rdg7! and if 46. Qc8 then 46. ... Qd7 47. Qa6 Ne7 defending stubbornly. 46. Ne6 Ne7 47. Qh3 Ng6 48. Rg2 Rf7

49. Ng3! Also very strong was 49. Rg5!+− with the threat of 50. Rxh5+ Kxh5 51. Qg4+ Kh6 52. Qg5+ Nxg5 53. hxg5 mate. 49. ... fxg3 50. Qxg3 Rf4 51. Be3 Qf7 52. Nxf4 exf4 53. Bxf4+ Nxf4 54. Qxg8 Qf8

The time has come for Leela Chess Zero to take over the whole board: 55. Rg5! a4. The Rook is taboo due to mate in a few moves. 56. c5! bxc5 (56. ... dxc5 57. e5+−) 57. b3! The pointe. 57. ... axb3+ 58. Kxb3 Be7 59. a4 c6 60. dxc6 Qf6 61. Rhg1 Bf8 62. c7 c4+ 63. Ka2 c3 64. c8=Q c2 65. Qf5 c1=N+ 66. Rxc1 Nxg5 67. Qgxg5+ Qxg5 68. hxg5+ 1 : 0.