[Event "Korchnoi - Petrosian Candidates Quarterfinal"] [Site "Il Ciocco ITA"] [Date "1977.03.16"] [Round "6"] [White "Tigran Vartanovich Petrosian (?)"] [Black "Viktor Korchnoi (?)"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "D41"] [Opening "Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. cxd5 Nxd5 6. e4 { D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation } Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nc6 12. O-O b6 13. Rfe1 Bb7 14. Rad1 Ne7?! { (0.39 → 1.03) Inaccuracy. Na5 was best. } (14... Na5 15. Bf1) 15. d5 exd5 16. exd5 Nf5?! { (0.69 → 1.27) Inaccuracy. Qd6 was best. } (16... Qd6 17. Ng5) 17. Ne5?! { (1.27 → 0.50) Inaccuracy. d6 was best. } (17. d6) 17... Nd6 18. Nc6 Bxc6?? { (0.57 → 3.05) Blunder. Qf6 was best. } (18... Qf6 19. Bb3) 19. dxc6 Nxc4 20. Qf4 Nd6 21. Rxd6 Qc7 22. g3 h6 23. Qe5?! { (2.96 → 1.79) Inaccuracy. Qd4 was best. } (23. Qd4 b5) 23... Rac8?! { (1.79 → 2.93) Inaccuracy. Rfe8 was best. } (23... Rfe8 24. Qxe8+) 24. Qd5 Kh7 25. Re4 Kg8 26. Kg2 a6 27. h4 b5 28. g4 Kh7 29. Re2 Kh8 30. g5 h5 31. Rd2 Rfe8 32. Qf3 g6?? { (2.63 → 7.69) Blunder. Kg8 was best. } (32... Kg8) 33. R2d5 Rf8 34. Rf6 Qe7 35. Rd7 Qe8? { (8.62 → Mate in 6) Checkmate is now unavoidable. Qc5 was best. } (35... Qc5 36. Rfxf7 Rxf7 37. Qxf7 Qxc6+ 38. Kh2 Qxd7 39. Qxd7 Rf8 40. Kg2 Rf5 41. Qa7 Kg8 42. Qxa6) 36. Rxg6 Qe5 37. Qxh5# { White wins by checkmate. } 1-0