[Event "Interzonal-03"]
[Site "Gothenburg"]
[Date "1955.09.14"]
[Round "18"]
[White "Donner, Jan Hein"]
[Black "Sliwa, Bogdan Stanislaw"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d6 5. a3 Bxc3+ 6. Qxc3 Nbd7 7. e3 b6 8. Ne2 Bb7 9. Ng3 h5 10. h4 Ne4 11. Nxe4 Bxe4 12. f3 Bb7 13. e4 e5 14. Be3 Qe7 15. Be2 c5 16. d5 Nf8 17. Kf2 Ng6 18. g3 Bc8 19. b4 f5 20. Bg5 Qf7 21. exf5 Bxf5 22. Kg2 O-O 23. Qe3 Rae8 24. Ra2 Qd7 25. Re1 Ne7 26. Bxe7 Qxe7 27. Bd3 Qd7 28. bxc5 bxc5 29. Rb2 Bh3+ 30. Kh2 Bf5 31. Kg2 Bh3+ 32. Kh2 Bf5 33. Be4 Re7 34. Reb1 Ref7 35. Rb8 Rxb8 36. Rxb8+ Rf8 37. Rb5 Qf7 38. Kg2 Bd7 39. Rb2 Bf5 40. Rb3 Qd7 41. Qd3 Bxe4 42. Qxe4 Qf7 43. a4 Qd7 44. Qg6 Rf6 45. Rb8+ Rf8 46. Rxf8+ Kxf8 47. Qxh5 Qxa4 48. Qf5+ Kg8 49. Qe6+ Kh7 50. Kh3 1/2-1/2