[Event "Olympiad-15 Preliminaries A"]
[Site "Varna"]
[Date "1962.09.19"]
[Round "4"]
[White "Dunkelblum, Arthur"]
[Black "Boysan, Mubin"]
[Result "1/2-1/2"]

1. c4 Nf6 2. d4 d6 3. Nf3 g6 4. g3 Bg7 5. Bg2 Nbd7 6. O-O O-O 7. Nc3 e5 8. e4 exd4 9. Nxd4 Ne5 10. b3 Bd7 11. h3 Nc6 12. Be3 Re8 13. Qd2 Nxd4 14. Bxd4 Bc6 15. Rfe1 Qd7 16. Nd5 Bxd5 17. cxd5 Re7 18. Rac1 Ne8 19. Bxg7 Kxg7 20. Kh2 Kg8 21. Qb4 Qc8 22. Qd4 a6 23. h4 Qg4 24. f3 Qh5 25. f4 Qh6 26. Qb4 b6 27. e5 Qf8 28. Bh3 Rd8 29. e6 f5 30. Bg2 Qg7 31. Qc3 Qxc3 32. Rxc3 a5 33. Bf3 h5 34. Rc6 Ra8 35. a4 Ra7 36. Kg2 Nf6 37. Kf2 Kf8 38. Ke3 Ke8 39. Kd4 Kd8 40. Ra1 Kc8 41. Rac1 Kb7 1/2-1/2