[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.13"]
[Round "2"]
[White "Donner, Jan Hein"]
[Black "Hort, Vlastimil"]
[Result "1/2-1/2"]
1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2 e5 8. d5 O-O 9. O-O Nc4 10. b3 Nd6 11. Bb2 Re8 12. Nd2 Na6 13. f4 Bd7 14. Bxe5 Bxe5 15. fxe5 Rxe5 16. Nc3 Qe7 17. Qe1 Nb4 18. Qf2 f5 19. Nf3 Rxe4 20. Nxe4 Nxe4 21. Qb2 Qc5+ 22. Qd4 Qxd4+ 23. Nxd4 Nxd5 24. Rfe1 c5 25. Nf3 Re8 26. Nd2 Ndf6 27. Rad1 Bc6 28. Nc4 b6 1/2-1/2