[Event "Olympiad-10 Preliminaries B"]
[Site "Helsinki"]
[Date "1952.08.10"]
[Round "1"]
[White "Morcken, Otto B"]
[Black "Trifunovic, Petar"]
[Result "0-1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O c5 7. Nc3 Nc6 8. d5 Na5 9. Qd3 a6 10. Bd2 Rb8 11. e4 b5 12. b3 e6 13. Rac1 b4 14. Nd1 e5 15. Kh1 Nh5 16. Nh4 Bd7 17. Ne3 Nb7 18. a4 Qe7 19. Bf3 Nf6 20. Rce1 Rbe8 21. Qe2 Kh8 22. Bc1 Ng8 23. Bg4 Nh6 24. Bxd7 Qxd7 25. Qc2 Na5 26. f3 f5 27. Nhg2 fxe4 28. fxe4 Rxf1+ 29. Rxf1 Rf8 30. Rxf8+ Bxf8 31. Kg1 Nf7 32. Nf1 Qg4 33. Qd3 Be7 34. Kf2 Bg5 35. Bxg5 Nxg5 36. Nd2 Qd1 37. Ne1 Qxd2+ 38. Qxd2 Nxe4+ 39. Ke2 Nxd2 40. Kxd2 Nxb3+ 0-1