[Event "corr"]
[Site "corr"]
[Date "1993.??.??"]
[Round "?"]
[White "De Laat, Piet JM"]
[Black "Koolstra, Rinze"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "47"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "12"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 e6 5. fxe4 Bb4 6. Bd3 Nxe4 7. Nge2 Nxc3 8. bxc3 Bd6 9. 0-0 0-0 10. Nf4 f5 11. Bc4 Qf6 12. Qh5 a6 13. Re1 Bxf4 14. Bxf4 c5 15. Bd6 Rd8 16. Bc7 g6 17. Bxd8 Qxd8 18. Qh6 cxd4 19. Bxe6+ Bxe6 20. Rxe6 dxc3 21. Rae1 Nc6 22. h4 Nd4 23. Re7 Qf8 24. Qxh7# 1-0

[Event "BEL BV corr"]
[Site "Belgium"]
[Date "1993.??.??"]
[Round "?"]
[White "Dopper, Johan C"]
[Black "Koolstra, Rinze"]
[Result "1/2-1/2"]
[ECO "A00"]
[PlyCount "50"]
[EventDate "1993.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "BEL"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. b4 f5 2. Bb2 Nf6 3. e3 e6 4. b5 Be7 5. c4 0-0 6. Nc3 Ne4 7. f4 Bf6 8. d4 d6 9. Nxe4 fxe4 10. Qc2 d5 11. a4 a6 12. Be2 axb5 13. axb5 Rxa1+ 14. Bxa1 c6 15. bxc6 bxc6 16. Bc3 Qb6 17. c5 Qa7 18. Nh3 e5 19. fxe5 Bh4+ 20. Kd1 Bxh3 21. gxh3 Bf2 22. Qc1 Qd7 23. Bg4 Qb7 24. Kc2 Qb5 25. Qd2 Qa4+ 1/2-1/2

[Event "NED-ch H corr"]
[Site "Netherlands"]
[Date "1992.??.??"]
[Round "?"]
[White "Koolstra, Rinze"]
[Black "Looijestijn, Jurgen"]
[Result "1-0"]
[ECO "C54"]
[PlyCount "45"]
[EventDate "1992.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+ 8. Nbxd2 d5 9. exd5 Nxd5 10. Qb3 Na5 11. Qa4+ Nc6 12. Bb5 Bd7 13. Qb3 Qe7+ 14. Kf1 Be6 15. Ne5 Ndb4 16. Bxc6+ bxc6 17. Qa4 Bd5 18. a3 f6 19. Re1 fxe5 20. Rxe5 Be6 21. axb4 Qd7 22. d5 0-0 23. Rxe6 1-0

[Event "NED-Cup sf BT06 corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Jansen, Joop GF"]
[Black "Koolstra, Rinze"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "57"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. 0-0 Nc6 8. Re1 Bg4 9. c4 Nf6 10. cxd5 Bxf3 11. Qxf3 Qxd5 12. Qxd5 Nxd5 13. Be4 0-0-0 14. Nc3 Bb4 15. Bxd5 Rxd5 16. a3 Ra5 17. Bf4 Rf5 18. g3 Bd6 19. Bxd6 cxd6 20. Rad1 Kd7 21. Kg2 h5 22. h4 f6 23. d5 Ne7 24. f4 Rc8 25. Kf3 Rc5 26. Ke4 g6 27. Rd3 Ke8 28. Kd4 Kf7 29. b4 1-0

[Event "NED-Cup sf BT01 corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Koolstra, Rinze"]
[Black "Van Berkel, Rinus JCM"]
[Result "1/2-1/2"]
[ECO "C41"]
[PlyCount "45"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 Nf6 4. Nc3 Nbd7 5. Bc4 Be7 6. 0-0 0-0 7. Qe2 exd4 8. Nxd4 Ne5 9. Bb3 c5 10. Nf5 Bxf5 11. exf5 Qd7 12. Nd5 Rfe8 13. c3 Bd8 14. Nxf6+ Bxf6 15. Qe4 Nc6 16. Qd3 Ne7 17. Be3 Qxf5 18. Qxd6 Rac8 19. Bc4 Red8 20. Qf4 Qxf4 21. Bxf4 Nd5 22. Bxd5 Rxd5 23. Rad1 1/2-1/2

[Event "NED-Cup sf M13 corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Koolstra, Rinze"]
[Black "Van Melis, ALM"]
[Result "1-0"]
[ECO "B30"]
[PlyCount "59"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. b3 Nge7 5. 0-0 a6 6. Bxc6 Nxc6 7. Bb2 d6 8. d4 cxd4 9. Nxd4 e5 10. Nf3 b5 11. Nc3 f5 12. Qd3 fxe4 13. Nxe4 Ra7 14. Rad1 Bg4 15. Nxd6+ Bxd6 16. Qxd6 Qxd6 17. Rxd6 Bxf3 18. gxf3 Rc7 19. Rc1 Ke7 20. Rd2 Rd8 21. Rxd8 Kxd8 22. c4 g6 23. cxb5 axb5 24. Rc5 Nd4 25. Bxd4 exd4 26. Rxb5 Rc1+ 27. Kg2 Kc7 28. Rd5 Rd1 29. f4 Kc6 30. Rd8 1-0

[Event "NED-Cup sf BT06 corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Tanis, C Kees"]
[Black "Koolstra, Rinze"]
[Result "1-0"]
[ECO "E12"]
[PlyCount "47"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 h6 6. Bh4 Be7 7. e3 c5 8. dxc5 bxc5 9. Be2 0-0 10. 0-0 Ne4 11. Bxe7 Qxe7 12. Qc2 Ng5 13. Nxg5 Qxg5 14. g3 Bc6 15. Rad1 Na6 16. f4 Qe7 17. Qd2 Rad8 18. Qd6 Qxd6 19. Rxd6 Nc7 20. Bf3 Ne8 21. Rd2 Bxf3 22. Rxf3 d6 23. e4 Rb8 24. Rfd3 1-0

[Event "NED-Cup sf M13 corr"]
[Site "Netherlands"]
[Date "1991.??.??"]
[Round "?"]
[White "Van Tienhoven, Richard M"]
[Black "Koolstra, Rinze"]
[Result "1/2-1/2"]
[ECO "A10"]
[PlyCount "53"]
[EventDate "1991.??.??"]
[EventType "tourn (corr)"]
[EventRounds "10"]
[EventCountry "NED"]
[SourceTitle "Corr Nr. 1"]
[Source "ChessBase"]
[SourceDate "1997.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. c4 f5 2. Nc3 Nf6 3. e4 fxe4 4. g4 g6 5. g5 Nh5 6. d3 exd3 7. Bxd3 Bg7 8. f4 0-0 9. f5 Bxc3+ 10. bxc3 Qe8 11. fxg6 hxg6 12. Nf3 Nc6 13. 0-0 Nf4 14. Nh4 Nxd3 15. Rxf8+ Kxf8 16. Qxd3 Kg7 17. Be3 d6 18. Rf1 Bd7 19. Qe4 b6 20. Bd4+ e5 21. Rf6 Ne7 22. Bf2 Bc6 23. Qc2 Qd7 24. Bg3 Qg4 25. Rxg6+ Nxg6 26. Qxg6+ Kf8 27. Nf5 1/2-1/2

