[Event "NED Open-ch16"]
[Site "Dieren"]
[Date "1985.08.06"]
[Round "8"]
[White "Van der Weijden, K."]
[Black "De Rooi, Paul"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "55"]
[EventDate "1985.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nc3 g6 2. e4 Bg7 3. Bc4 e6 4. d4 Ne7 5. Bg5 c5 6. d5 Qa5 7. Nge2 exd5 8. exd5 Nf5 9. 0-0 0-0 10. Ne4 d6 11. c3 Nd7 12. Bb3 h6 13. g4 hxg5 14. gxf5 Ne5 15. Nxd6 Qc7 16. Nxc8 Nf3+ 17. Kg2 Qxh2+ 18. Kxf3 Re8 19. Ng3 gxf5 20. Nxf5 Qf4+ 21. Kg2 Qxf5 22. Nd6 Qf4 23. Nxe8 Rxe8 24. Qf3 Qd6 25. Rae1 Be5 26. Qf5 f6 27. Qg6+ Kf8 28. f4 1-0

[Event "NED Open-ch16"]
[Site "Dieren"]
[Date "1985.08.01"]
[Round "4"]
[White "Van der Weijden, K."]
[Black "Riemersma, Liafbern"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "45"]
[EventDate "1985.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e3 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. Be2 0-0 6. h3 Re8 7. 0-0 e5 8. d3 Nc6 9. a3 d5 10. cxd5 Nxd5 11. Nxd5 Qxd5 12. e4 Qd6 13. Be3 a5 14. Qc2 a4 15. b4 axb3 16. Qxb3 Be6 17. Qc3 Nd4 18. Bxd4 exd4 19. Qb2 c5 20. Rfb1 b5 21. a4 bxa4 22. Qb5 Reb8 23. Rxa4 0-1

[Event "NED Open-ch16"]
[Site "Dieren"]
[Date "1985.07.30"]
[Round "2"]
[White "Van der Weijden, K."]
[Black "Storms, Laurens"]
[Result "0-1"]
[ECO "D10"]
[PlyCount "72"]
[EventDate "1985.07.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e3 e5 2. d4 e4 3. c4 c6 4. Nc3 d5 5. Qb3 Nf6 6. Bd2 Be7 7. Nh3 0-0 8. cxd5 b6 9. dxc6 Nxc6 10. Rc1 Bb7 11. Be2 a6 12. Na4 Nd7 13. Bg4 Nf6 14. Be2 Nd7 15. 0-0 b5 16. Rfd1 Na5 17. Bxa5 Qxa5 18. Nc5 Nxc5 19. dxc5 Rac8 20. Rd7 Rc7 21. Qd1 Rfc8 22. Bg4 Rxd7 23. Qxd7 Rxc5 24. Rd1 Rd5 25. Qe8+ Bf8 26. Re1 h5 27. Be2 Qc7 28. f4 exf3 29. Bxf3 Re5 30. Qxe5 Qxe5 31. Bxb7 Bd6 32. e4 Qxh2+ 33. Kf2 Bc5+ 34. Kf3 h4 35. Nf4 g5 36. Nh5 g4+ 0-1

[Event "NED Open-ch15"]
[Site "Dieren"]
[Date "1984.08.01"]
[Round "3"]
[White "Van der Weijden, K."]
[Black "Klip, Hans"]
[Result "0-1"]
[ECO "A04"]
[PlyCount "37"]
[EventDate "1984.07.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 f5 2. d3 d6 3. e4 e5 4. Nc3 Nf6 5. g3 g6 6. Bg5 Bg7 7. d4 exd4 8. Nxd4 fxe4 9. Nd5 c6 10. Nxf6+ Bxf6 11. Bh6 Qb6 12. Nb3 d5 13. Bg2 Nd7 14. f3 Ne5 15. Qe2 Qb4+ 16. Bd2 exf3 17. Bxf3 Qc4 18. 0-0-0 0-0 19. Bc3 0-1

[Event "NED Open-ch13"]
[Site "Dieren"]
[Date "1982.08.??"]
[Round "5"]
[White "Federau, Juergen"]
[Black "Van der Weijden, K."]
[Result "0-1"]
[ECO "D40"]
[PlyCount "70"]
[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. d4 e6 2. c4 c5 3. Nf3 Nf6 4. Nc3 d5 5. e3 Nc6 6. a3 cxd4 7. exd4 Be7 8. Bd3 dxc4 9. Bxc4 0-0 10. 0-0 b6 11. Qd3 Bb7 12. Rd1 Rc8 13. Ba2 g6 14. Bh6 Re8 15. Ne5 Bf8 16. Bg5 Bg7 17. Qh3 Qc7 18. Nb5 Qe7 19. Ng4 h5 20. Nxf6+ Bxf6 21. Bxf6 Qxf6 22. Nd6 Ba8 23. Nxc8 Rxc8 24. d5 Nd4 25. dxe6 Ne2+ 26. Kh1 Nf4 27. exf7+ Kh7 28. Qxc8 Bxg2+ 29. Kg1 Nh3+ 30. Qxh3 Bxh3 31. Rd3 Bf5 32. Re3 h4 33. Re8 Bh3 34. f4 Qxb2 35. Bd5 Qd4+ 0-1

[Event "NED Open-ch13"]
[Site "Dieren"]
[Date "1982.08.??"]
[Round "3"]
[White "Van der Veen, Jan"]
[Black "Van der Weijden, K."]
[Result "1/2-1/2"]
[ECO "C06"]
[PlyCount "120"]
[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 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 b6 8. a3 c4 9. Bc2 Na5 10. 0-0 Ba6 11. f4 g6 12. f5 gxf5 13. Nf4 Rg8 14. Qh5 Qg5 15. Qxh7 Rg7 16. Qh3 0-0-0 17. Nf3 Qg4 18. Qxg4 Rxg4 19. Be3 Nc6 20. Kf2 Ne7 21. g3 Rg8 22. h4 Bg7 23. Rg1 Ng6 24. Ng5 Nxf4 25. Bxf4 Rdf8 26. Rae1 Bb5 27. Rh1 Rh8 28. Bd1 Nb8 29. Nh3 Be8 30. Bg5 Nd7 31. Nf4 Bh6 32. Bxh6 Rxh6 33. h5 Rg8 34. Re3 a6 35. Rh4 f6 36. exf6 Nxf6 37. Bf3 Ne4+ 38. Bxe4 dxe4 39. Kg2 Kd7 40. Kh3 Kd6 41. g4 e5 42. dxe5+ Kxe5 43. gxf5 Kxf5 44. Ne2 Rxh5 45. Rxh5+ Bxh5 46. Ng3+ Kf4 47. Rxe4+ Kf3 48. Nxh5 Kxe4 49. Nf6+ Kd3 50. Nxg8 Kc2 51. Ne7 Kxb2 52. Nd5 b5 53. Kg2 Kxa3 54. Kf2 Kb2 55. Ke2 a5 56. Kd2 Kb3 57. Kc1 a4 58. Kb1 a3 59. Ka1 a2 60. Nc7 Kxc3 1/2-1/2

