[Event "Interzonal-10a"]
[Site "Biel"]
[Date "1976.07.29"]
[Round "13"]
[White "Castro Rojas, Oscar Humberto"]
[Black "Huebner, Robert"]
[Result "1/2-1/2"]
[WhiteElo "2380"]
[BlackElo "2585"]

1. e4 e6 2. g3 d5 3. Bg2 Nf6 4. Nc3 Bb4 5. Nge2 O-O 6. a3 Bxc3 7. Nxc3 d4 8. Ne2 d3 9. cxd3 Qxd3 10. Nf4 Qa6 11. d4 Nc6 12. Be3 Rd8 13. Qe2 Qa5+ 14. b4 Nxb4 15. O-O Nc6 16. d5 Ne7 17. dxe6 Bxe6 18. Nxe6 fxe6 19. Qc4 Kf7 20. Rab1 Qa6 21. Qxa6 bxa6 22. Rfc1 Rd7 23. Rb4 c6 24. Ra4 Rb7 25. Rxa6 Nd7 26. Bg5 Rb6 27. Ra4 a5 28. Be3 Rb3 29. Bh3 Ne5 30. Rc5 Rb1+ 31. Kg2 Nd3 32. Rcxa5 Ne1+ 33. Kf1 Nf3+ 34. Kg2 Ne1+ 35. Kf1 Nf3+ 36. Kg2 1/2-1/2