[Event "Canadian op"]
[Site "Edmonton"]
[Date "1979.07.13"]
[Round "8"]
[White "Buenaventura, F."]
[Black "Trefiak, John"]
[Result "0-1"]
[ECO "A05"]
[PlyCount "116"]
[EventDate "1979.07.07"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "CAN"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d3 g6 4. g3 Bg7 5. Bg2 Nc6 6. c3 Nf6 7. 0-0 0-0 8. Na3 Rb8 9. Re1 b5 10. d4 b4 11. Nc2 bxc3 12. bxc3 Nd7 13. Be3 Qa5 14. Bd2 Rb2 15. a4 Ba6 16. Na3 cxd4 17. cxd4 Qb6 18. Bc3 Rb3 19. Nb5 Rxc3 20. Nxc3 Nxd4 21. Nd5 Nxf3+ 22. Qxf3 Qd8 23. Rab1 Ne5 24. Qe3 Qd7 25. Qb3 e6 26. Ne3 Nd3 27. Red1 Nc5 28. Qa3 Rd8 29. a5 Na4 30. Rdc1 Nc5 31. Nc4 Bd4 32. Nd2 Nd3 33. Bf1 Bxf2+ 34. Kg2 Bc5 35. Qc3 Nxc1 36. Bxa6 Na2 37. Qf6 Nb4 38. Be2 Rc8 39. Rf1 Nc2 40. Kh1 Bd4 41. Qh4 Ne3 42. Rb1 Rc2 43. Nf3 Bb2 44. Ng1 Kg7 45. Qf4 Bd4 46. a6 e5 47. Qf3 Qe6 48. Rb7 Qa2 49. g4 g5 50. h4 Nd1 51. hxg5 Nf2+ 52. Kg2 Nxg4 53. Qxg4 Bxg1 54. Kxg1 Rxe2 55. Rxf7+ Kxf7 56. Qd7+ Kg6 57. Qxd6+ Kh5 58. Qh6+ Kg4 0-1

[Event "Canadian op"]
[Site "Edmonton"]
[Date "1979.07.12"]
[Round "7"]
[White "Babb, Jeff"]
[Black "Buenaventura, F."]
[Result "1-0"]
[ECO "B25"]
[PlyCount "53"]
[EventDate "1979.07.07"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "CAN"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]

1. e4 g6 2. Nc3 Bg7 3. g3 c5 4. Bg2 Nc6 5. d3 d6 6. Nh3 Nf6 7. 0-0 0-0 8. Be3 Ng4 9. Bd2 e5 10. f3 Nf6 11. Nf2 Be6 12. f4 Qd7 13. Nd5 Ng4 14. f5 gxf5 15. Nxg4 fxg4 16. Nf6+ Bxf6 17. Rxf6 Ne7 18. Bh6 Ng6 19. Qd2 Rfe8 20. Raf1 a5 21. c4 b5 22. b3 b4 23. Qf2 a4 24. h4 gxh3 25. Bxh3 Bxh3 26. Rxf7 Re7 27. Rf8+ 1-0

