[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.26"]
[Round "12"]
[White "Smejkal, Jan"]
[Black "Castro Rojas, Oscar Humberto"]
[Result "1-0"]
[WhiteElo "2615"]
[BlackElo "2380"]

1. c4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. O-O O-O 6. Nc3 c6 7. d3 d6 8. e4 e5 9. c5 dxc5 10. Qb3+ Kh8 11. Nxe5 Qd6 12. Nc4 Qe6 13. e5 Ne8 14. f4 Nc7 15. Be3 Rd8 16. Rad1 Qf7 17. d4 cxd4 18. Rxd4 Rxd4 19. Bxd4 Be6 20. Qxb7 Bxc4 21. Qxc7 Na6 22. Qxc6 Rd8 23. e6 Bxe6 24. Re1 Bc4 25. Rxe7 Qxe7 26. Qxc4 Nb4 27. Bc5 Qe1+ 28. Qf1 Qd2 29. Bxb4 Qd4+ 30. Qf2 Qxb4 31. h4 Rb8 32. Qxa7 Qxb2 33. Kh2 h6 34. Nd5 Rd8 35. a4 Re8 36. Ne7 Qf6 37. Nd5 Qb2 38. Qd7 Re2 39. Qc8+ Kh7 40. Qxf5+ Kg8 41. Kh3 1-0