[Event "NED Open-ch13"]
[Site "Dieren"]
[Date "1982.08.??"]
[Round "2"]
[White "Bertholee, Rob"]
[Black "Koster, Dries"]
[Result "1-0"]
[ECO "B78"]
[PlyCount "43"]
[EventDate "1982.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 d6 9. f3 Bd7 10. Qd2 Qc7 11. 0-0-0 Rfc8 12. h4 Ne5 13. Bg5 Nc4 14. Qe2 Nxb2 15. Ncb5 Bxb5 16. Nxb5 Qa5 17. Kxb2 Nxe4+ 18. Kc1 Nxg5 19. hxg5 a6 20. Qxe7 d5 21. Bxd5 Rf8 22. Rxh7 1-0

[Event "NED Open-ch08 Reinbouw"]
[Site "Velp"]
[Date "1977.08.03"]
[Round "6"]
[White "Van der Sterren, Paul"]
[Black "Koster, Dries"]
[Result "1-0"]
[ECO "B72"]
[WhiteElo "2375"]
[PlyCount "63"]
[EventDate "1977.07.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 Nc6 8. Nb3 0-0 9. f4 Be6 10. g4 Na5 11. g5 Ne8 12. Bd4 Bc4 13. Bxg7 Bxe2 14. Qxe2 Nxg7 15. 0-0-0 Nxb3+ 16. cxb3 Rc8 17. Kb1 Qa5 18. Nd5 Rfe8 19. f5 gxf5 20. exf5 Nxf5 21. Rhf1 e6 22. Nf6+ Kg7 23. b4 Qe5 24. Nxe8+ Rxe8 25. Qxe5+ dxe5 26. Rd7 Re7 27. Rfd1 Kf8 28. Rd8+ Re8 29. R1d7 Rxd8 30. Rxd8+ Ke7 31. Rh8 e4 32. Kc1 1-0

[Event "NED Open-ch08 Reinbouw"]
[Site "Velp"]
[Date "1977.07.31"]
[Round "4"]
[White "Koster, Dries"]
[Black "Lith, Rick C"]
[Result "0-1"]
[ECO "B77"]
[PlyCount "50"]
[EventDate "1977.07.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Bc4 0-0 9. Qd2 Bd7 10. Bb3 Nxd4 11. Bxd4 b5 12. a4 bxa4 13. Nxa4 Qb8 14. Bxf6 Bxf6 15. Bd5 Bxa4 16. Rxa4 Qxb2 17. 0-0 Rac8 18. Bb3 Rc7 19. f4 Rb8 20. Rd1 Rxb3 21. cxb3 Rc2 22. Qe3 Rxg2+ 23. Kf1 Rxh2 24. Qf3 Bh4 25. Kg1 Rc2 0-1

