[Event "NED Open-ch14"]
[Site "Dieren"]
[Date "1983.08.??"]
[Round "1"]
[White "Riemens, Michael"]
[Black "Zwikker, W."]
[Result "1-0"]
[ECO "A58"]
[PlyCount "63"]
[EventDate "1983.08.??"]
[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 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. g3 g6 7. Bg2 d6 8. b3 Bg7 9. Bb2 0-0 10. Nh3 Qb6 11. Bc3 Bb5 12. 0-0 Na6 13. Re1 Ra7 14. Nf4 Rfa8 15. a4 Bd7 16. Na3 Rb8 17. Rb1 Rab7 18. Nc4 Qa7 19. Na5 Rb6 20. Nc6 Bxc6 21. dxc6 Nb4 22. e4 Nxc6 23. Bxf6 Bxf6 24. Nd5 Ra6 25. Bf1 Ra5 26. Nxf6+ exf6 27. Qxd6 Nd4 28. Qxf6 Rxb3 29. Rxb3 Nxb3 30. Bc4 Nd4 31. Rb1 Rxa4 32. Rb8+ 1-0

[Event "NED Open-ch14"]
[Site "Dieren"]
[Date "1983.08.??"]
[Round "3"]
[White "Zwikker, W."]
[Black "Piket, Marcel"]
[Result "0-1"]
[ECO "E17"]
[PlyCount "54"]
[EventDate "1983.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Be7 5. g3 0-0 6. Bg2 b6 7. 0-0 Bb7 8. d4 c5 9. Ne5 Nc6 10. dxc5 bxc5 11. Nd2 Qd6 12. Nxc6 Bxc6 13. Bxf6 gxf6 14. cxd5 exd5 15. e4 d4 16. f4 d3 17. Qh5 a5 18. Kh1 a4 19. Bh3 Kg7 20. Bf5 Rh8 21. Rad1 axb3 22. axb3 Ra2 23. Qg4+ Kf8 24. Qf3 Bb5 25. Nc4 Bxc4 26. bxc4 Qd4 27. Qxd3 Qb2 0-1

[Event "NED Open-ch14"]
[Site "Dieren"]
[Date "1983.08.??"]
[Round "7"]
[White "Zwikker, W."]
[Black "Riemersma, Liafbern"]
[Result "1-0"]
[ECO "A25"]
[PlyCount "55"]
[EventDate "1983.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 e5 3. g3 Nc6 4. Bg2 Bb4 5. e4 Bxc3 6. bxc3 0-0 7. Ne2 Re8 8. 0-0 b6 9. d3 d6 10. f4 Nd7 11. f5 f6 12. g4 Kh8 13. Rf3 Bb7 14. Rh3 Na5 15. Qe1 Nf8 16. Qh4 Qd7 17. g5 fxg5 18. Bxg5 g6 19. Ng3 b5 20. cxb5 d5 21. Rf1 dxe4 22. fxg6 Nxg6 23. Qh6 Re6 24. Nxe4 Bxe4 25. Bxe4 Rg8 26. Kh1 Qg7 27. Qh5 c6 28. Rf6 1-0

[Event "NED Open-ch09 Reinbouw"]
[Site "Velp"]
[Date "1978.08.??"]
[Round "3"]
[White "Scheeren, Peter MJ"]
[Black "Zwikker, W."]
[Result "1-0"]
[ECO "E11"]
[PlyCount "81"]
[EventDate "1978.08.??"]
[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 Nf6 2. c4 e6 3. g3 Bb4+ 4. Nd2 0-0 5. Bg2 d6 6. Ngf3 Nbd7 7. 0-0 e5 8. Nb3 exd4 9. Nfxd4 a5 10. a3 Bc5 11. Nxc5 Nxc5 12. b3 Re8 13. h3 d5 14. cxd5 Nxd5 15. Bb2 c6 16. Qc2 Qe7 17. e4 Nf6 18. Rfe1 Be6 19. Rac1 Nfd7 20. a4 Na6 21. Qc3 Qb4 22. Qe3 Nac5 23. Bc3 Qb6 24. Nxe6 Nxe6 25. Qxb6 Nxb6 26. Red1 Nc5 27. Bd4 Nxb3 28. Bxb6 Nxc1 29. Rxc1 Ra6 30. Rb1 Re7 31. Bc5 Rd7 32. e5 h6 33. Bd6 f6 34. Bf1 fxe5 35. Bxa6 bxa6 36. Bxe5 Rd5 37. f4 Rd3 38. Kf2 Ra3 39. Rc1 Rxa4 40. Rxc6 Ra2+ 41. Kf3 1-0

