[Event "IBM"]
[Site "Amsterdam"]
[Date "1973.??.??"]
[Round "11"]
[White "Quinteros, Miguel Angel"]
[Black "Andersson, Ulf"]
[Result "1/2-1/2"]

1. Nf3 Nf6 2. c4 c6 3. Nc3 d5 4. e3 e6 5. d4 Nbd7 6. Bd3 Bd6 7. e4 dxe4 8. Nxe4 Nxe4 9. Bxe4 h6 10. O-O O-O 11. b3 e5 12. dxe5 Nxe5 13. Bb2 Qf6 14. Kh1 Bg4 15. Qd4 Rfe8 16. Rae1 Re6 17. Nxe5 Bxe5 18. Bh7+ Kxh7 19. Rxe5 Rxe5 20. Qxe5 Qxe5 21. Bxe5 Rd8 22. Bf4 Rd3 23. h3 Be6 24. Be3 a5 25. c5 g5 26. Re1 Kg6 27. Kg1 a4 28. bxa4 Bxa2 29. Re2 Bd5 30. Rd2 Rb3 31. Rd4 f5 32. Bd2 Rb1+ 33. Kh2 Rb2 34. h4 Rc2 35. hxg5 hxg5 36. Be3 f4 37. Rd2 Rc4 38. Bd4 Rxa4 39. f3 Kf5 40. Bg7 Rc4 41. Bf8 Rb4 42. Bg7 Rc4 43. Bf8 g4 44. fxg4+ Kxg4 45. Rb2 Kf5 46. Bd6 Re4 47. Kg1 Rd4 48. Kf2 Rd1 49. Rb4 Rd2+ 50. Ke1 Rxg2 51. Rxf4+ Ke6 52. Rb4 Rg7 53. Kd2 Bg2 54. Kc3 Rh7 55. Rg4 Bf1 56. Re4+ Kd7 57. Re1 Rf7 58. Bb8 Rf3+ 59. Kb4 Bd3 60. Be5 Bc2 61. Re2 Bf5 62. Rd2+ Ke6 63. Bb8 Be4 64. Rd6+ Ke7 1/2-1/2