[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.19"]
[Round "12"]
[White "Cuellar Gacharna, Miguel"]
[Black "Quinteros, Miguel Angel"]
[Result "0-1"]

1. d4 c5 2. e3 Nf6 3. Nf3 b6 4. d5 g6 5. c4 Bg7 6. Nc3 O-O 7. Be2 d6 8. O-O e5 9. dxe6 fxe6 10. Qc2 Bb7 11. Rd1 Qe7 12. Bd2 e5 13. Be1 e4 14. Nd2 Nbd7 15. a4 Nb8 16. Nd5 Bxd5 17. cxd5 Nbd7 18. Bb5 Rad8 19. Nc4 Ne5 20. Nxe5 Qxe5 21. h3 a5 22. Ra3 Kh8 23. Bc3 Qf5 24. Qd2 h5 25. Bc4 Nd7 26. Rf1 Bxc3 27. Qxc3+ Ne5 28. Rb3 Rb8 29. f4 exf3 30. Rxf3 Qb1+ 31. Kh2 Kg8 32. Rxf8+ Rxf8 33. Bd3 Qd1 34. Qc2 Qe1 35. Qe2 Qh4 36. g3 Qxa4 37. Rxb6 Nf3+ 38. Kh1 Qa1+ 39. Qf1 Ne1 40. Qg1 Qd1 41. Bc4 Qb1 42. Be2 Qe4+ 43. Kh2 Nf3+ 44. Bxf3 Rxf3 45. Rb8+ Kf7 46. Rb7+ Ke8 47. Rb8+ Kd7 48. h4 Qc2+ 49. Kh3 Rf2 50. Rb7+ Kc8 0-1