[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.23"]
[Round "15"]
[White "Karpov, Anatoly"]
[Black "Radulov, Ivan"]
[Result "1/2-1/2"]

1. c4 e5 2. Nc3 c5 3. g3 g6 4. Bg2 Bg7 5. Nf3 Ne7 6. O-O O-O 7. Ne1 Nbc6 8. Nc2 d6 9. Ne3 Be6 10. a3 Qd7 11. d3 Bh3 12. Ned5 Bxg2 13. Kxg2 Nxd5 14. Nxd5 Ne7 15. Nxe7+ Qxe7 16. e4 f5 17. f3 h5 18. Bd2 Kh7 19. b4 Bh6 20. exf5 Rxf5 21. Bxh6 Kxh6 22. Qd2+ Kg7 23. bxc5 dxc5 24. Rae1 Rd8 25. Re3 Rd4 26. Qe2 Qd6 27. Rb1 Rf7 28. a4 b6 29. Re1 Rd7 30. h4 Rxd3 31. Rxd3 Qxd3 32. Qxe5+ Kh7 33. Qe6 Qf5 34. Qxf5 gxf5 35. Kf2 Kg7 36. a5 Rd4 37. axb6 axb6 38. Re6 Rxc4 39. Rxb6 f4 1/2-1/2