[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1973.01.24"]
[Round "8"]
[White "Hartoch, Robert G"]
[Black "Zuidema, Coen"]
[Result "1/2-1/2"]

1. c4 Nf6 2. Nf3 c6 3. Nc3 d5 4. d4 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. Qf3 Bb7 12. Be2 Bh6 13. Bxf6 Nxf6 14. Qxf6 Qxf6 15. exf6 O-O-O 16. Rd1 b4 17. Na4 c5 18. Bxc4 Bxg2 19. Rg1 Bf3 20. Be2 Bxe2 21. Kxe2 cxd4 22. Rg4 e5 23. Nc5 Rd5 24. Ne4 Kd7 25. Rh4 Ra5 26. Ra1 Ke6 27. Kd3 Kf5 28. f3 Rd5 29. a3 b3 30. Rh5+ Kg6 31. Rh3 Kf5 32. Rg1 Rdd8 33. Rh5+ Ke6 34. Nc5+ Kxf6 35. Ke4 Bf4 36. Rf5+ Ke7 37. Rg7 Rdf8 38. Nxb3 Rxh2 39. Nxd4 exd4 40. Kxf4 1/2-1/2