[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1970.01.19"]
[Round "6"]
[White "Donner, Jan Hein"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]

1. d4 g6 2. c4 Bg7 3. g3 Nf6 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4 c6 9. Rb1 exd4 10. Nxd4 Re8 11. h3 Nc5 12. Re1 a5 13. Bf4 Nh5 14. Be3 Nf6 15. Qc2 Qe7 16. Rbd1 Bd7 17. f3 Rad8 1/2-1/2