[Event "Hoogovens 28th"]
[Site "Beverwijk"]
[Date "1966.01.17"]
[Round "5"]
[White "Donner, Jan Hein"]
[Black "Ivkov, Borislav"]
[Result "0-1"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. d5 Na5 8. b3 c5 9. Bb2 a6 10. O-O Rb8 11. Nd2 b5 12. Qc2 e6 13. dxe6 fxe6 14. cxb5 axb5 15. Nce4 Bb7 16. Rad1 Qe7 17. Nxf6+ Bxf6 18. Bxf6 Rxf6 19. Ne4 Bxe4 20. Qxe4 b4 21. Qd3 Rb6 22. f4 Rf7 23. Rd2 Qf6 24. Rc1 Rc7 25. e4 Qe7 26. e5 d5 27. Rdc2 c4 28. Qe3 Qc5 29. Qxc5 Rxc5 30. bxc4 dxc4 31. Bf1 c3 32. Kf2 Kf7 33. Bd3 Rd5 34. Ke3 Rb8 35. Rb1 Rbd8 36. Be2 Nc6 37. Bc4 Rc5 38. Bd3 Ra5 39. Be4 Nd4 40. Rf2 Ra3 41. Bc2 Rxa2 42. Bxg6+ Kxg6 43. Rxa2 b3 44. Rxb3 Nxb3 45. Rc2 Rc8 46. Kd3 Nd2 47. g4 Nf3 48. Ke4 Nxh2 49. f5+ Kg5 0-1