[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1973.01.18"]
[Round "4"]
[White "Donner, Jan Hein"]
[Black "Szabo, Laszlo"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. d5 Nh5 8. g3 Nd7 9. Be3 Nhf6 10. Nd2 c6 11. a3 a6 12. b4 cxd5 13. cxd5 Ne8 14. Nc4 f5 15. f3 Ndf6 16. Rc1 fxe4 17. fxe4 Bh3 18. Bf1 Bg4 19. Be2 Bh3 20. Bf1 Bg4 21. Be2 Bh3 1/2-1/2