[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "8"]
[White "Donner, Jan Hein"]
[Black "Quinteros, Miguel Angel"]
[Result "1/2-1/2"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 d6 5. e4 Bg7 6. Be2 O-O 7. Nf3 e5 8. Bg5 h6 9. Bh4 Qc7 10. Nd2 Nh7 11. g4 a6 12. f3 Nd7 13. Bf2 Ndf6 14. Be3 h5 15. h3 Rb8 16. a3 b6 17. b4 Bd7 18. Bd3 Rfc8 19. Qe2 Qd8 20. Qf2 Bf8 21. Ke2 h4 22. Rhb1 Ne8 23. Rb2 Ng5 24. Qg2 Be7 25. Rab1 cxb4 26. axb4 b5 27. Rc2 Rc7 28. cxb5 axb5 29. Nb3 Nh7 30. Kf1 Bg5 31. Qd2 Qf6 32. Kg2 Bf4 33. Bxf4 exf4 34. Rbc1 g5 35. Na5 Qe5 36. Ne2 Rxc2 37. Rxc2 Nf8 38. Nc6 Bxc6 39. Rxc6 Ng6 40. Nc3 Qd4 41. Ne2 Qa7 42. Rc2 Ne5 43. Ra2 Qb6 44. Nc3 Qd4 45. Be2 Qxb4 46. Rb2 Qa5 47. Nxb5 1/2-1/2