[Event "Olympiad-20 Preliminaries B"]
[Site "Skopje"]
[Date "1972.09.19"]
[Round "1"]
[White "Ivkov, Borislav"]
[Black "Keene, Raymond"]
[Result "1-0"]

1. c4 g6 2. Nc3 c5 3. g3 Bg7 4. Bg2 Nc6 5. a3 e6 6. Rb1 Nge7 7. b4 cxb4 8. axb4 d5 9. b5 Ne5 10. cxd5 exd5 11. d4 Nc4 12. e3 Bf5 13. Ra1 Qd7 14. Qb3 O-O 15. Nge2 a6 16. bxa6 bxa6 17. Nxd5 Nxd5 18. Qxc4 Be6 19. Qa4 Qb5 20. Qxb5 axb5 21. Rxa8 Rxa8 22. Nf4 Ra1 23. Nxd5 Rxc1+ 24. Kd2 Rxh1 25. Bxh1 Bf8 26. Kc3 Kg7 27. Nb4 Bc4 28. Bc6 Bd6 29. Na6 Ba3 30. Nc7 1-0