[Event "Hoogovens"]
[Site "Wijk aan Zee"]
[Date "1971.01.27"]
[Round "13"]
[White "Ivkov, Borislav"]
[Black "Huebner, Robert"]
[Result "0-1"]

1. c4 g6 2. d4 Bg7 3. g3 Nf6 4. Bg2 O-O 5. Nc3 c5 6. Nf3 Nc6 7. O-O d6 8. d5 Na5 9. Nd2 e5 10. a3 b6 11. b4 Nb7 12. Bb2 Ng4 13. h3 Nh6 14. e3 Bd7 15. Qc2 f5 16. f4 Nf7 17. Nb3 g5 18. bxc5 dxc5 19. a4 exf4 20. exf4 Nfd6 21. Qd3 Re8 22. Rf2 gxf4 23. Rxf4 Qg5 24. Nd2 Bd4+ 25. Rxd4 cxd4 26. Nd1 Re1+ 27. Kh2 f4 28. g4 f3 29. Bxf3 Nf5 30. Nf1 Qf4+ 0-1