[Event "Vancouver Diamond Jubilee op"]
[Site "Vancouver"]
[Date "1974.12.26"]
[Round "2"]
[White "Strothotte, Tom"]
[Black "Lactin, Derek"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "39"]
[EventDate "1974.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d6 3. e4 Nbd7 4. f4 c5 5. Nf3 Qa5 6. Bd3 cxd4 7. Nxd4 Nc5 8. 0-0 g6 9. Bb5+ Bd7 10. Bxd7+ Ncxd7 11. Kh1 Rc8 12. Qe2 Bg7 13. Nb3 Qh5 14. Rf3 a6 15. Be3 Qg4 16. Rd1 0-0 17. Qe1 Rfd8 18. Nd4 Nc5 19. f5 b5 20. Rf4 1-0

[Event "New Westminster Diamond Jubilee op"]
[Site "New Westminster"]
[Date "1973.12.30"]
[Round "9"]
[White "Lactin, Derek"]
[Black "Camfferman, Cor"]
[Result "1-0"]
[ECO "A11"]
[PlyCount "29"]
[EventDate "1973.12.26"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 g6 2. g3 Bg7 3. Bg2 c6 4. d4 e6 5. e4 Ne7 6. Bg5 0-0 7. Nc3 b6 8. Nf3 Qe8 9. e5 Ba6 10. Nd2 Nf5 11. Nce4 Qc8 12. g4 Nh6 13. Be7 Re8 14. Nd6 Qc7 15. Nxe8 1-0

[Event "Vancouver Centre s"]
[Site "Vancouver"]
[Date "1973.09.22"]
[Round "?"]
[White "Sion, Cris"]
[Black "Lactin, Derek"]
[Result "0-1"]
[ECO "B03"]
[PlyCount "68"]
[EventDate "1973.09.07"]
[EventType "swiss"]
[EventCountry "CAN"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Bb4 10. a3 Bxc3+ 11. bxc3 Na5 12. Be2 0-0 13. Bg5 Qd7 14. c5 Nbc4 15. Bxc4 Nxc4 16. Qb3 Na5 17. Qb4 b6 18. cxb6 axb6 19. 0-0 Nc6 20. Qb2 Qd5 21. Qf2 h6 22. Bd2 Bd3 23. Qg3 Kh8 24. Rf2 Qb3 25. Re1 Rxa3 26. Re3 Bh7 27. Ne1 Ne7 28. Ref3 Nf5 29. Qh3 Qa4 30. g4 Ne7 31. Rxf7 Rxf7 32. Rxf7 Qe8 33. Qf3 Kg8 34. Rf4 Nd5 0-1

