[Event "Olympiad-18 Preliminaries D"]
[Site "Lugano"]
[Date "1968.10.18"]
[Round "1"]
[White "Donner, Jan Hein"]
[Black "O'Kelly de Galway, Alberic"]
[Result "1-0"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4 Nc6 9. Bd3 cxd4 10. exd4 Be7 11. Be3 Bd7 12. a3 Rc8 13. Bc2 Qa5 14. Ng5 h6 15. Nge4 Rfd8 16. b4 Qc7 17. Rc1 Be8 18. Qd3 Ng4 19. Ng3 g6 20. Bb3 Qd7 21. d5 Nce5 22. Qe2 Nxe3 23. Qxe3 Nc4 24. dxe6 Qxe6 25. Qxh6 Bf8 26. Qh4 Be7 27. Qh6 Bf8 28. Qf4 Bd6 29. Qe4 Bxg3 30. Qxe6 Bxh2+ 31. Kxh2 fxe6 32. Ne4 b5 33. Nc5 Rd4 34. Rfe1 Bf7 35. Nxe6 Rd2 36. Ng5 Rxf2 37. Nxf7 Kxf7 38. Re4 Rd8 39. Bxc4+ bxc4 40. Rcxc4 Rd7 41. Rf4+ Rxf4 42. Rxf4+ Kg7 43. Rc4 Kh6 44. Rc5 g5 45. Ra5 Kh5 46. Kh3 Rd3+ 47. g3 Rd7 48. g4+ Kg6 49. Ra6+ Kg7 50. Kg3 Rf7 1-0