[Event "Interzonal-09a"]
[Site "Leningrad"]
[Date "1973.06.25"]
[Round "16"]
[White "Cuellar Gacharna, Miguel"]
[Black "Byrne, Robert Eugene"]
[Result "0-1"]

1. Nf3 Nf6 2. g3 g6 3. c4 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 Nc6 7. Nc3 Rb8 8. h3 a6 9. Be3 b5 10. cxb5 axb5 11. d5 Na5 12. Nd4 b4 13. Ncb5 e5 14. dxe6 c5 15. exf7+ Rxf7 16. Nc6 Nxc6 17. Bxc6 Rb6 18. Nxd6 Rxc6 19. Nxf7 Qxd1 20. Rfxd1 Kxf7 21. Rac1 Bf8 22. Kg2 Be6 23. b3 Nd5 24. Bd2 Bg7 25. e4 Nc3 26. Bxc3 bxc3 27. Rd8 Bf6 28. Rdd1 Rb6 29. f4 Bd4 30. g4 Bc8 31. Kf3 Bb7 32. Rc2 Rb4 33. Re2 Ke6 34. g5 Bc6 35. h4 Rb8 36. Kg4 Rf8 37. Kg3 Rh8 38. Kg4 h5+ 39. Kg3 Rf8 40. f5+ Ke5 41. f6 Bb5 42. Rg2 Kxe4 43. Re1+ Kd5 44. Kf4 Bd3 45. Rd1 c2 46. Rc1 Re8 47. Rcxc2 Re4+ 48. Kf3 Re3+ 49. Kf4 Rh3 50. Rce2 Rxh4+ 51. Kf3 Bxe2+ 52. Rxe2 Be5 53. a4 Rh3+ 54. Kf2 Rxb3 0-1