[Event "Interzonal-11a"]
[Site "Riga"]
[Date "1979.09.27"]
[Round "16"]
[White "Trois, Francisco R Torres"]
[Black "Rodriguez, Ruben"]
[Result "1/2-1/2"]
[WhiteElo "2415"]

1. Nf3 g6 2. d4 Bg7 3. c4 Nf6 4. Nc3 d5 5. e3 O-O 6. cxd5 Nxd5 7. Bc4 Nxc3 8. bxc3 Nc6 9. O-O b6 10. Qe2 Na5 11. Bd3 c5 12. Rd1 Qc7 13. Ba3 Bb7 14. Rac1 Rfd8 15. e4 e6 16. e5 Bh6 17. Rc2 Rac8 18. Bc1 Bxc1 19. Rdxc1 Bxf3 20. Qxf3 Qe7 21. Qf4 Rd7 22. h4 Rcd8 23. Be4 cxd4 24. cxd4 Rxd4 25. Rc7 R4d7 26. Rxd7 Qxd7 27. Qf6 Rc8 28. Rxc8+ Qxc8 29. h5 Nc4 30. Kh2 Qb8 31. f4 Ne3 32. Kh3 Qf8 33. g4 Nd1 34. Kh4 Nc3 35. Bc6 Ne2 36. Be4 Nc3 37. Bc6 Nxa2 38. f5 Nb4 39. Be4 Nd5 40. Bxd5 exd5 41. Qc6 Qe7+ 42. f6 g5+ 43. Kh3 Qa3+ 44. Kg2 h6 45. Qe8+ Qf8 46. Qd7 d4 47. e6 fxe6 48. Qxe6+ Qf7 49. Qc8+ Kh7 50. Qf5+ Kh8 51. Qc8+ Kh7 52. Qf5+ Kg8 53. Qc8+ Qf8 54. Qe6+ Qf7 55. Qc8+ Kh7 56. Qf5+ Kh8 57. Qc8+ Qg8 58. Qf5 Qa2+ 59. Kh3 Qb3+ 60. Kg2 Qb2+ 61. Kh3 Qc3+ 62. Kg2 Qd2+ 63. Kh3 1/2-1/2