[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "5"]
[White "Langeweg, Kick"]
[Black "Radulov, Ivan"]
[Result "0-1"]

1. Nf3 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. d4 c5 6. O-O a6 7. Bb3 Qc7 8. Qe2 Nc6 9. Nc3 Bd6 10. Bd2 O-O 11. Rac1 b6 12. dxc5 Bxc5 13. Bc2 Bb7 14. Ne4 Be7 15. Nxf6+ Bxf6 16. Bc3 Bxc3 17. Qd3 g6 18. Qxc3 Rac8 19. Be4 Qe7 20. a3 Na5 21. Qd3 b5 22. Bxb7 Qxb7 23. Rxc8 Rxc8 24. h3 Qc7 25. Rd1 Qc4 26. Qd7 Qc7 27. Qd4 Nc6 28. Qf6 Ne7 29. e4 Nc6 30. h4 Qe7 31. Qxe7 Nxe7 32. Rd7 Nc6 33. Ng5 Ne5 34. Ra7 h6 35. Nf3 Ng4 36. g3 Rc1+ 37. Kg2 Rc2 38. Nd4 Rxf2+ 39. Kg1 Rxb2 40. Rxa6 b4 41. axb4 Rxb4 0-1