[Event "Mar del Plata International-24"]
[Site "Mar del Plata"]
[Date "1961.03.12"]
[Round "1"]
[White "Byrne, Robert Eugene"]
[Black "Perez Perez, Francisco Jose"]
[Result "1-0"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nc6 7. O-O a6 8. h3 Rb8 9. e4 b5 10. cxb5 axb5 11. Re1 b4 12. Nd5 e6 13. Nxf6+ Bxf6 14. Bh6 Re8 15. e5 Bh8 16. Rc1 Bb7 17. Ng5 Qd7 18. Ne4 Ne7 19. Nf6+ Bxf6 20. exf6 Bxg2 21. fxe7 Ba8 22. Bf8 c5 23. dxc5 Qc6 24. f3 dxc5 25. Qe2 h5 26. Qe5 Rxf8 27. exf8=Q+ Rxf8 28. Re3 Rd8 29. Rxc5 Qa6 30. Rc1 Qxa2 31. Rd3 Bd5 32. g4 Qa7+ 33. Kg2 Qa6 34. Rd4 h4 35. g5 Qa8 36. Rf1 Qb8 37. Qxb8 Rxb8 38. Rxh4 b3 39. Rc1 Kg7 40. Ra4 e5 41. Ra5 Rd8 42. Kf2 Be6 43. Rxe5 Bxh3 44. Rc7 Kf8 45. Rb7 Be6 46. Ke3 Rd6 47. Ra5 Rd8 48. Rab5 Kg7 49. Rb8 Rd1 50. Re8 Bd7 51. Rd8 1-0