[Event "Pan American Championship"]
[Site "Santa Cruz BOL"]
[Date "1977.11.??"]
[EventDate "?"]
[Round "9"]
[Result "0-1"]
[White "de Leon, Otto"]
[Black "Pedro Donoso"]
[ECO "B44"]
[WhiteElo "?"]
[BlackElo "?"]
[PlyCount "72"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nb5 d6 6. Be3 Nf6 7. Bd3 a6 8.
Nd4 Be7 9. Nxc6 bxc6 10. O-O e5 11. c4 O-O 12. Nc3 Be6 13. Qe2 a5 14. Rad1
Qc7 15. h3 g6 16. Rd2 Nh5 17. b3 Nf4 18. Qf3 Nxd3 19. Rxd3 f5 20. Qe2 a4 21.
f3 f4 22. Bf2 axb3 23. axb3 Rfb8 24. Qc2 g5 25. Rfd1 h5 26. Ne2 g4 27. hxg4
hxg4 28. g3 gxf3 29. Rxf3 Bg4 30. Rfd3 f3 31. Nc1 c5 32. Qd2 Kg7 33. Qe3 Qd8
34. Rd5 Qh8 35. Kf1 Qh1+ 36. Bg1 f2 0-1