[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.19"]
[Round "6"]
[White "Cortlever, Nicolaas"]
[Black "Kavalek, Lubomir"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Nf3 d6 6. Bg2 Nc6 7. O-O Bf5 8. d5 Na5 9. Nd4 Bd7 10. Qd3 c5 11. Nb3 Nxb3 12. axb3 a6 13. e4 b5 14. h3 Qb6 15. f4 Ne8 16. g4 Rb8 17. Bd2 Nc7 18. Rfe1 e6 19. Kh1 exd5 20. Nxd5 Nxd5 21. cxd5 Bxb2 22. Ra2 Bd4 23. Ba5 Qa7 24. Bc3 Bxc3 25. Qxc3 b4 26. Qa1 Bb5 27. e5 Rbe8 28. f5 Rxe5 29. Rxe5 dxe5 30. Qxe5 Re8 31. Qf4 Qe7 32. Rc2 Qe3 33. Qxe3 Rxe3 34. Rxc5 Rc3 35. Rxc3 bxc3 36. Be4 Be2 37. d6 Kf8 38. fxg6 hxg6 39. Bc2 Ke8 40. Kg1 Kd7 41. Kf2 Bb5 42. h4 Kxd6 43. h5 gxh5 44. gxh5 Ke7 45. h6 1/2-1/2