[Event "Sarajevo-09"]
[Site "Sarajevo"]
[Date "1966.04.01"]
[Round "11"]
[White "Ong, Yok Hwa"]
[Black "Kotov, Alexander"]
[Result "0-1"]

1. e4 g6 2. d4 Bg7 3. c4 c5 4. Nf3 cxd4 5. Nxd4 Nc6 6. Be3 d6 7. Nc3 Nf6 8. Be2 O-O 9. O-O Bd7 10. h3 Nxd4 11. Bxd4 Bc6 12. Qd3 a6 13. f4 e6 14. Rad1 Qe7 15. Bf3 e5 16. Be3 Rfe8 17. fxe5 dxe5 18. Bg5 h6 19. Be3 Rad8 20. Qe2 b5 21. Nd5 Qb7 22. b3 Nh7 23. Qd2 h5 24. Kh2 bxc4 25. bxc4 Rb8 26. Qf2 Bf8 27. Qg3 Bg7 28. Rd2 Re6 29. Bd1 a5 30. Rdf2 Be8 31. Be2 Qc8 32. c5 Qd7 33. Bc4 Qa4 34. Bd3 Qa3 35. Bc4 Rb7 36. Nb6 Rf6 37. Rxf6 Nxf6 38. Rxf6 h4 39. Qg5 Bxf6 40. Qxg6+ Bg7 41. Qg5 Kf8 42. Bd5 f6 43. Bc1 Qxc5 44. Qe3 Qxe3 45. Bxe3 Rc7 46. Bd2 Rc2 47. Be1 Bh6 48. Bxh4 Bf4+ 49. Bg3 Bf7 50. a4 Be3 51. Bxf7 Kxf7 52. Nd5 Bd2 53. Nb6 Ra2 54. h4 Be3 55. Nc4 Bd4 56. Nxa5 Rxa4 57. Nb7 Kg6 58. Be1 Ra1 59. Ba5 Kh5 60. Bd8 Kg6 0-1