[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1969.01.17"]
[Round "4"]
[White "Kavalek, Lubomir"]
[Black "Donner, Jan Hein"]
[Result "1/2-1/2"]
1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. O-O-O Nbd7 10. g4 b5 11. a3 Rb8 12. Bxf6 Nxf6 13. f5 O-O 14. g5 Nd7 15. f6 gxf6 16. gxf6 Nxf6 17. e5 dxe5 18. Nc6 Kh8 19. Nxb8 Qxb8 20. Bg2 b4 21. axb4 Qxb4 22. Rhe1 Qf4+ 23. Qxf4 exf4 24. Bf3 Bc5 25. Kb1 Be3 26. Rd6 Nd7 27. b4 Ne5 28. Be2 Bb7 29. Nd1 Ba7 30. Bxa6 Bb8 31. Rb6 Nf3 32. Re2 Ba8 33. c3 Bc7 34. Rb5 Be4+ 35. Rxe4 Nd2+ 36. Kc2 Nxe4 37. Rb7 Bb8 38. Bd3 f5 39. Re7 e5 40. c4 Bd6 41. Re6 Bxb4 42. Rxe5 Bd6 43. Re6 Bb8 44. Bxe4 fxe4 45. Rxe4 f3 46. Re1 Bxh2 47. Rf1 Bd6 48. Kd3 Bc5 49. Ke4 f2 50. Kd3 h5 51. Nxf2 1/2-1/2