[Event "IBM"]
[Site "Amsterdam"]
[Date "1970.07.24"]
[Round "9"]
[White "Langeweg, Kick"]
[Black "Donner, Jan Hein"]
[Result "0-1"]

1. Nf3 d5 2. c4 c6 3. b3 Bg4 4. Bb2 Nd7 5. cxd5 cxd5 6. e3 Ngf6 7. h3 Bh5 8. g4 Bg6 9. d3 e6 10. g5 Ng8 11. Rg1 Ne7 12. Nc3 Bh5 13. Be2 h6 14. gxh6 Rxh6 15. Ng5 Bxe2 16. Nxe2 Nf5 17. e4 Nh4 18. Nf4 d4 19. Nf3 Nxf3+ 20. Qxf3 Qf6 21. Qg3 Bd6 22. Nh5 Bb4+ 0-1