[Event "Bucharest Int 12th"]
[Site "Bucharest"]
[Date "1973.03.10"]
[Round "4"]
[White "Spiridonov, Nikola"]
[Black "Knaak, Rainer"]
[Result "0-1"]

1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. Nf3 Bg4 5. e3 Nf6 6. Be2 O-O 7. O-O Nc6 8. h3 Bxf3 9. Bxf3 Nd7 10. b3 e5 11. Bxc6 bxc6 12. dxe5 Bxe5 13. Bb2 Rb8 14. Qc2 Nc5 15. Ba3 Nd7 16. Rad1 Qe7 17. Ne2 Rb6 18. Nd4 Ra6 19. Bc1 Bg7 20. b4 c5 21. b5 Rb6 22. Nc6 Qf6 23. a4 Nb8 24. a5 Rb7 25. a6 Rb6 26. Nxa7 c6 27. Qa4 cxb5 28. cxb5 Qe7 29. Bd2 Qxa7 30. Ba5 Nd7 31. Bxb6 Nxb6 32. Qf4 d5 33. Qd6 Rc8 34. Rc1 Qc7 35. Qxc7 Rxc7 36. Rfe1 c4 37. Rc2 f5 38. Rce2 Ra7 39. g4 Kf7 40. gxf5 gxf5 41. f4 Ke6 42. Kf2 Kd6 43. Rg1 Kc5 44. Rg5 Kxb5 45. Rxf5 c3 46. Kg2 Kc4 47. Rc2 h6 48. h4 Nc8 49. e4 Re7 50. Kf3 Kd3 51. Rxc3+ Bxc3 52. Rxd5+ Bd4 53. Rd8 Na7 54. Rd6 h5 55. Rd5 Rxe4 56. Rxh5 Re3+ 57. Kg4 Re6 58. Ra5 Ke4 59. h5 Rf6 0-1