[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.15"]
[Round "4"]
[White "Byrne, Robert Eugene"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[WhiteElo "2540"]
[BlackElo "2380"]

1. e4 Nc6 2. Nf3 d6 3. d4 Bg4 4. Be3 Nf6 5. h3 Bh5 6. Nc3 e6 7. Be2 d5 8. exd5 exd5 9. Ne5 Bxe2 10. Qxe2 Bb4 11. Qb5 Bxc3+ 12. bxc3 O-O 13. Qxb7 Nxe5 14. dxe5 Ne4 15. c4 Qe7 16. O-O Qxe5 17. cxd5 Nc3 18. Bxa7 Qxd5 19. Qxd5 Nxd5 20. Bc5 Rfc8 21. Rfd1 c6 22. a3 Ra4 23. Rd4 Rca8 24. Rad1 g5 25. Rxa4 Rxa4 26. Rd4 Ra6 27. g3 Kg7 28. Kf1 Kf6 29. c4 Nc7 30. Rd6+ Ne6 31. Bb4 h5 32. Ke2 g4 33. h4 Ke5 34. Ke3 Nc7 35. Rh6 Ne6 36. Rxh5+ f5 37. c5 Nc7 38. f4+ Ke6 39. Kd3 Nb5 40. Rh6+ Kf7 41. Rh7+ 1-0