The TCEC Cup 9 is a knockout format played in TCEC, including all qualifying participants. It will be a knockout championship with the 32 participants divided into brackets. For an engine to win the TCEC Cup gold medal it must win a total of five matches. The two losing semifinalists will play a match for 3rd and 4th place (`small final’). No bookless games will be played in the TCEC Cup.
c. All games take place in pairs in which both engines each play each side of every book exit. Engines will play both sides of each position selected. Openings chosen will roughly approximate human games in terms of their frequency. A new opening should thus occur every other game, then the reverse game is played, so two games in a row from the same starting book position. Because each engine will thus play both sides of every opening, fairness is guaranteed.
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https://www.chess.com/hr/computer-chess-championship
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PGN OF THE GAME:
[Event “TCEC Cup 9 Round16”]
[Site “https://lichess.org/4br5YPVo“]
[Date “2021.10.22”]
[Round “1.20”]
[White “LCZero 0.28-dev+_609958”]
[Black “Defenchess 2.3_dev2”]
[Result “1-0”]
[WhiteElo “3622”]
[BlackElo “3398”]
[Variant “Standard”]
[TimeControl “1800+5”]
[ECO “D85”]
[Opening “Grünfeld Defense: Exchange Variation, Modern Exchange Variation”]
[Termination “Unknown”]
[Annotator “lichess.org”]
1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 { D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation } O-O?! { (0.00 → 0.64) Inaccuracy. c5 was best. } (7… c5 8. Bb5+ Nc6 9. O-O O-O 10. Be3 Bg4 11. Bxc6 bxc6 12. Rc1) 8. Be2 c5 9. O-O b6 10. Rb1 Bb7 11. d5 Bxc3 12. h4 Qd6 13. h5 Nd7 14. Rb3 Bf6 15. Nd2 Bd4?! { (0.79 → 1.67) Inaccuracy. Qc7 was best. } (15… Qc7) 16. hxg6 hxg6 17. Rh3 Bg7 18. Nc4 Qc7 19. f4 b5?! { (1.71 → 2.39) Inaccuracy. Bd4+ was best. } (19… Bd4+ 20. Be3 Nf6 21. Bxd4 cxd4 22. Qxd4 Qc5 23. Qxc5 bxc5 24. Bf3 Ba6 25. Rc1 Bxc4 26. Rxc4) 20. Qe1?! { (2.39 → 1.56) Inaccuracy. Ne3 was best. } (20. Ne3 Bd4) 20… bxc4 21. Qh4 Nf6? { (1.43 → 2.71) Mistake. Rfc8 was best. } (21… Rfc8 22. f5 g5 23. Bxg5 Qe5 24. Rg3 Kf8 25. Bh6 Qxg3 26. Qxg3 Bxh6 27. d6 Re8 28. Bxc4) 22. e5 Rfd8 23. exf6 Bxf6 24. Qh7+ Kf8 25. f5 g5 26. Bxg5 Qe5 27. Re3 Qd4 28. Bh6+ Ke8 29. Rd1 Bxd5 30. Bf3 Qxd1+ 31. Bxd1 Kd7 32. Bg7 Rh8 33. Ba4+ Kc7 34. Rxe7+ Kb6 35. Qxh8 Rxh8 36. Bxf6 Rg8 37. Re2 a5 38. Kh2 Rg4 39. Bc3 Rg8 40. Kh3 Rg5 41. g4 Bf3 42. Re3 Bc6?! { (5.74 → 8.49) Inaccuracy. Bxg4+ was best. } (42… Bxg4+ 43. Kh4) 43. Bxc6 Kxc6 44. Re8 Kd7 45. Ra8 Ke7 46. Kg3 f6 47. Kf4 a4 48. Bxf6+ Kxf6 49. Ra6+ Ke7 50. Kxg5 Kd7?! { (80.18 → Mate in 28) Checkmate is now unavoidable. c3 was best. } (50… c3 51. f6+) 51. Rxa4 Kc6 52. Rxc4 Kd5 53. Rxc5+ { White wins. } 1-0
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