[Event "Olympiad-17 Preliminaries A"]
[Site "Havana"]
[Date "1966.10.31"]
[Round "6"]
[White "Ko, Chi"]
[Black "Johansson, Martin Sr"]
[Result "0-1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be3 O-O 6. h3 e5 7. Nf3 Nbd7 8. Be2 exd4 9. Nxd4 Re8 10. Qc2 Nc5 11. f3 c6 12. O-O-O Qe7 13. Rhe1 Nfd7 14. Nb3 a5 15. Nxc5 dxc5 16. Na4 Rb8 17. Bf4 Ne5 18. Nb6 Qc7 19. Qb3 Nd3+ 20. Rxd3 Qxf4+ 21. Kb1 Be6 22. Red1 Bd4 23. Qc2 Qe5 24. Ra3 Qc7 25. Rb3 a4 26. Nxa4 b5 27. Nc3 b4 28. Na4 Ra8 29. Rbd3 Bxc4 30. Qxc4 Rxa4 31. R1d2 Rea8 32. b3 R4a5 33. Bf1 Qa7 34. Qc2 Qe7 35. Qc4 Qe5 36. Rc2 Qg3 37. Rd1 Bf6 38. Qe2 Qe5 39. Kc1 Qa1+ 40. Kd2 Rd8+ 41. Ke1 Bh4+ 0-1