[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1993.??.??"]
[Round "?"]
[White "Brunia, Robert Jan"]
[Black "Den Boer, Henk"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "96"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. Nf3 Nc6 2. g3 e5 3. e4 Nf6 4. d3 Bc5 5. Bg2 d6 6. Nbd2 Qe7 7. Nb3 Bb6 8. Qe2 Bg4 9. Be3 Bxe3 10. Qxe3 0-0 11. c3 a5 12. a4 Be6 13. Nbd2 Ng4 14. Qe2 f5 15. h3 Nf6 16. Nh2 fxe4 17. dxe4 Rae8 18. 0-0 Qd7 19. g4 Qf7 20. Qb5 Rb8 21. Nhf3 Qg6 22. Nh2 h5 23. f3 Nh7 24. Qe2 Rf4 25. Rf2 Ng5 26. Ndf1 Rbf8 27. Ng3 hxg4 28. hxg4 Ne7 29. Nf5 Bxf5 30. exf5 Qh6 31. Nf1 Kf7 32. Ne3 e4 33. Qc4+ Ke8 34. Qb5+ Nc6 35. Nd5 exf3 36. Nxf4 fxg2 37. Kxg2 Rh8 38. Nh5 Kd7 39. Rh1 Re8 40. Nf4 Qf6 41. Re2 Rxe2+ 42. Qxe2 Ne5 43. Qb5+ Nc6 44. Re1 Nf7 45. Nd5 Qh4 46. Re4 Qg5 47. Qe2 Nce5 48. Kg3 Kc8 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1993.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Buter, Andre"]
[Result "1/2-1/2"]
[ECO "E87"]
[PlyCount "130"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be3 0-0 6. f3 e5 7. d5 Nh5 8. Qd2 f5 9. Nge2 f4 10. Bf2 a5 11. Nc1 b6 12. Nd3 Na6 13. a3 Nc5 14. Nxc5 bxc5 15. Bd3 g5 16. h3 Nf6 17. Bc2 Bd7 18. Nb5 h5 19. 0-0-0 h4 20. Qc3 Bxb5 21. cxb5 Nd7 22. Kd2 Qb8 23. Bd3 Bh6 24. Ke2 Qb7 25. Ra1 Ra7 26. Qc2 Rfa8 27. Rhc1 Bf8 28. Rab1 Be7 29. Kf1 Kf7 30. Be1 a4 31. Ra1 Nb6 32. Bf2 Nd7 33. Qd2 Kg7 34. Rc3 Kf7 35. Be1 Nb6 36. Qc2 Rb8 37. Bd2 Bd8 38. Be2 Be7 39. Qd3 Rba8 40. Bd1 Nd7 41. Bc1 Nb6 42. b3 Rb8 43. Bc2 axb3 44. Bxb3 Rba8 45. Bb2 Nd7 46. a4 Kf6 47. Bd1 Nb6 48. Bc1 Nxa4 49. Rca3 Nb6 50. Qb3 Rxa3 51. Rxa3 Rxa3 52. Qxa3 Qa8 53. Qa6 Kf7 54. Bd2 Ke8 55. Ba5 Qb8 56. Ke2 Kd8 57. Kd3 Qa8 58. Kc3 Kd7 59. Be2 Bd8 60. Bd1 Qb8 61. Kb3 Qc8 62. Qa7 Ke8 63. Bxb6 cxb6 64. Qh7 Be7 65. Qg8+ Kd7 1/2-1/2

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1993.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Kamps, Ronald"]
[Result "1-0"]
[ECO "A40"]
[PlyCount "47"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 b6 2. c4 Bb7 3. Nc3 g6 4. e4 d6 5. Be3 Bg7 6. Qd2 Nd7 7. f3 e6 8. Nge2 Qe7 9. Nc1 c5 10. d5 e5 11. Nd3 h5 12. Be2 Bh6 13. Bxh6 Nxh6 14. b4 a6 15. Rb1 Rb8 16. 0-0 g5 17. bxc5 dxc5 18. Rb2 Qf6 19. Bd1 Kd8 20. Ba4 Nf8 21. Rfb1 b5 22. cxb5 c4 23. bxa6 Qxa6 24. Nxe5 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1993.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Van Tellingen, Frank"]
[Result "0-1"]
[ECO "E88"]
[PlyCount "68"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 c6 8. Qd2 a5 9. Nge2 cxd5 10. cxd5 Bd7 11. Ng3 Na6 12. Be2 h5 13. Bd1 b5 14. Rc1 Qe8 15. 0-0 b4 16. Nb1 Bb5 17. Rf2 Nd7 18. a4 bxa3 19. Nxa3 Ndc5 20. Nc4 Bxc4 21. Rxc4 a4 22. Qc3 Rb8 23. Ne2 Qd7 24. Nc1 Rfc8 25. Qa3 Qb5 26. Rfc2 Rc7 27. Be2 Qa5 28. Bd2 Qb6 29. Be3 Qa5 30. Bd2 Qb6 31. Be3 Bh6 32. Bxh6 Nd3+ 33. Kh1 Nf2+ 34. Kg1 Nh3+ 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1993.??.??"]
[Round "?"]
[White "Fokke, John"]
[Black "Den Boer, Henk"]
[Result "0-1"]
[ECO "C53"]
[PlyCount "82"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Qe7 5. 0-0 Nf6 6. Re1 d6 7. d4 Bb6 8. dxe5 dxe5 9. a4 0-0 10. b4 Rd8 11. Qc2 a6 12. Bg5 h6 13. Bh4 Be6 14. Na3 Bg4 15. Nd2 Rd7 16. Bd5 Rad8 17. Ndc4 Ba7 18. b5 Nb8 19. Bxb7 a5 20. Bd5 g5 21. Bg3 Nxd5 22. Nxe5 Nf6 23. Nxd7 Rxd7 24. Nc4 Qd8 25. e5 Nh5 26. Kh1 Nxg3+ 27. fxg3 Be6 28. Qe2 Bd5 29. Rad1 Bxc4 30. Rxd7 Qxd7 31. Qxc4 Qd2 32. Rf1 Qd7 33. Qe2 Qe7 34. Rf6 Qc5 35. Qf1 Nd7 36. Rc6 Qxe5 37. Rxh6 f6 38. c4 Kg7 39. Rh5 Nc5 40. Qb1 Nd3 41. h3 Qxg3 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1992.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Bouma, Albert"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "76"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nc3 e5 4. e3 exd4 5. exd4 Nf6 6. Be3 Be7 7. Bd3 0-0 8. Nge2 Nb4 9. c5 Nxd3+ 10. Qxd3 b6 11. b4 a5 12. b5 Re8 13. h3 c6 14. 0-0 cxb5 15. Nxb5 Ne4 16. f3 Ng5 17. Nec3 Ne6 18. cxb6 Ba6 19. a4 Bb4 20. Qf5 Bxc3 21. Nxc3 Bxf1 22. Kxf1 Qxb6 23. Nxd5 Qa6+ 24. Kg1 Rab8 25. Rc1 Qe2 26. Rc2 Qd1+ 27. Kh2 Qe1 28. Bd2 Qh4 29. Rc4 Qf2 30. Be3 Qa2 31. Qd3 Rb2 32. Qf1 Qb3 33. Bh6 Qb7 34. Qc1 Qxd5 35. Rc8 Rxc8 36. Qxc8+ Qd8 37. Qc1 Qb8+ 38. f4 gxh6 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1992.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Hoekstra, Peter"]
[Result "1-0"]
[ECO "D15"]
[PlyCount "69"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. e3 b5 6. a4 b4 7. Nb1 Ba6 8. Ne5 e6 9. Bxc4 Bxc4 10. Nxc4 Be7 11. 0-0 Nbd7 12. b3 c5 13. Bb2 0-0 14. Nbd2 Qc7 15. Rc1 cxd4 16. Bxd4 Rac8 17. Qe2 Qb8 18. Na5 e5 19. Nc6 Rxc6 20. Rxc6 exd4 21. exd4 Bd6 22. g3 Re8 23. Qa6 Bf8 24. Rfc1 Nd5 25. Rc8 Rxc8 26. Rxc8 Qb6 27. Qc4 N7f6 28. Nf3 g6 29. Ne5 Qe6 30. Rc6 Qf5 31. Rxf6 Qxf6 32. Qxd5 Qf5 33. Nd7 Qb1+ 34. Kg2 Be7 35. Qe5 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1992.??.??"]
[Round "?"]
[White "Greven, Ron"]
[Black "Den Boer, Henk"]
[Result "0-1"]
[ECO "C30"]
[PlyCount "90"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 d6 3. Nf3 Nc6 4. Bc4 Be7 5. 0-0 Nf6 6. Nc3 Bg4 7. Be2 exf4 8. d3 Bxf3 9. Rxf3 g5 10. d4 Qd7 11. Bb5 a6 12. Ba4 d5 13. e5 Ne4 14. Qd3 0-0-0 15. a3 Qe6 16. Bb3 Nxd4 17. Nxe4 Nxf3+ 18. Qxf3 Qxe5 19. Nd2 Qe3+ 20. Kf1 Bc5 21. Qxe3 fxe3 22. Nf3 Rhe8 23. Ke2 g4 24. Ne1 f5 25. Nd3 Ba7 26. Nf4 c6 27. c3 h5 28. Bc2 Rf8 29. Ne6 Rde8 30. Nxf8 Rxf8 31. Bxe3 Re8 32. Bxf5+ Kc7 33. Rf1 Rxe3+ 34. Kd1 d4 35. cxd4 Bxd4 36. Kd2 Rb3 37. Bg6 Rxb2+ 38. Kd3 Rxg2 39. Kxd4 Rxh2 40. Ke4 h4 41. Kf4 g3 42. Be4 Ra2 43. Kg4 Rxa3 44. Rf7+ Kb6 45. Rh7 Ra4 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1992.??.??"]
[Round "?"]
[White "Schaaps, Cor"]
[Black "Den Boer, Henk"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "101"]
[EventDate "1992.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Bg5 c6 3. e3 Nf6 4. Nd2 Bf5 5. Bd3 Bxd3 6. cxd3 e6 7. Ngf3 h6 8. Bh4 Bb4 9. 0-0 Nbd7 10. a3 Be7 11. Rc1 Rc8 12. Qa4 Qb6 13. e4 g5 14. Bg3 Nh5 15. exd5 Nxg3 16. fxg3 exd5 17. Rce1 f6 18. Rf2 Kf7 19. Kf1 Bd6 20. Ne5+ Bxe5 21. dxe5 Rhe8 22. e6+ Rxe6 23. Rxe6 Kxe6 24. Re2+ Kf7 25. Qg4 Qd8 26. Qe6+ Kg6 27. g4 Ne5 28. Rxe5 Qc7 29. Qf5+ Kg7 30. Re6 Rf8 31. Nf3 Rf7 32. Re8 Re7 33. Rxe7+ Qxe7 34. Nd4 Qe3 35. Qd7+ Kg6 36. Qg7+ Kxg7 37. Nf5+ Kf7 38. Nxe3 Ke6 39. d4 b6 40. Ke2 c5 41. dxc5 bxc5 42. b4 c4 43. b5 Kd6 44. Kd2 Kc5 45. a4 d4 46. Nf5 Kd5 47. Nxh6 Ke4 48. Nf5 c3+ 49. Kc2 Kd5 50. a5 Kc5 51. Nxd4 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1991.??.??"]
[Round "6"]
[White "Den Boer, Henk"]
[Black "Buter, Andre"]
[Result "1-0"]
[ECO "E87"]
[PlyCount "62"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 Nh5 8. Qd2 Nf6 9. Be2 h5 10. h3 Nh7 11. g4 h4 12. f4 exf4 13. Bxf4 g5 14. Be3 Be5 15. 0-0-0 Bd7 16. Nf3 f6 17. Rhf1 Na6 18. Nxe5 fxe5 19. Rxf8+ Kxf8 20. Rf1+ Kg7 21. Bd1 Qe7 22. Ne2 c5 23. Nc3 Nc7 24. Ba4 Bxa4 25. Nxa4 Rf8 26. Rf5 Rxf5 27. exf5 b6 28. Nc3 Ne8 29. Ne4 Kh6 30. Bxg5+ Qxg5 31. Nxg5 Nxg5 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1991.??.??"]
[Round "?"]
[White "Den Boer, Henk"]
[Black "Kamps, Ronald"]
[Result "0-1"]
[ECO "D35"]
[PlyCount "76"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. e3 Nbd7 6. Nf3 Bb4 7. cxd5 exd5 8. a3 Bd6 9. Bd3 b5 10. 0-0 Bb7 11. e4 dxe4 12. Nxe4 Be7 13. Re1 0-0 14. Qc2 h6 15. Bf4 Nxe4 16. Bxe4 Nf6 17. Rac1 Bd6 18. Bxd6 Qxd6 19. Ne5 Rfe8 20. Qb3 Nd5 21. Qc2 Nf6 22. Qb3 Nd5 23. Qc2 Nf6 24. Qb3 Nd5 25. Rc5 a6 26. Qc2 Rac8 27. f3 f6 28. Nf7 Qd7 29. Bh7+ Kf8 30. Rxe8+ Qxe8 31. Qe4 Qxf7 32. Bg6 Qe7 33. Qb1 Qe3+ 34. Kf1 Qxd4 35. Rc2 Ne3+ 36. Ke1 Nxc2+ 37. Qxc2 Qe3+ 38. Kf1 Rd8 0-1

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1991.??.??"]
[Round "7"]
[White "Keesman, Karel"]
[Black "Den Boer, Henk"]
[Result "1/2-1/2"]
[ECO "D55"]
[PlyCount "72"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Nf3 a6 7. cxd5 exd5 8. Bd3 c6 9. Qc2 h6 10. Bxf6 Bxf6 11. h3 Be6 12. b4 Nd7 13. 0-0 Be7 14. Rab1 Nb6 15. Ne2 Bd6 16. Nf4 Qe7 17. Nxe6 fxe6 18. Qb3 Rf7 19. Rfc1 Nd7 20. Bc2 Raf8 21. Qd3 g6 22. Bd1 Kg7 23. Rc2 Nf6 24. Ne5 Bxe5 25. dxe5 Nh7 26. f4 h5 27. g3 Rg8 28. a4 Kh8 29. h4 Nf8 30. Rcb2 Nd7 31. e4 Nb6 32. exd5 Nxd5 33. b5 Rc8 34. bxa6 Qc5+ 35. Kh1 bxa6 36. Rc2 Qa7 1/2-1/2

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1991.??.??"]
[Round "?"]
[White "Mak, Nico"]
[Black "Den Boer, Henk"]
[Result "1-0"]
[ECO "C91"]
[PlyCount "63"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bb7 7. c3 Be7 8. Re1 0-0 9. d4 d6 10. Bg5 h6 11. Bh4 Re8 12. a4 Qd7 13. Nbd2 Nh7 14. Bg3 Bf8 15. Nf1 Na5 16. Bc2 exd4 17. cxd4 Nc6 18. e5 Nb4 19. Bb3 Be7 20. Bxf7+ Kxf7 21. e6+ Qxe6 22. Rxe6 Kxe6 23. Qe1+ Kd7 24. Qxb4 c6 25. axb5 axb5 26. Rxa8 Rxa8 27. d5 Ra4 28. dxc6+ Bxc6 29. Qd2 Kc7 30. Nd4 Bd7 31. b3 Ra8 32. Qc2+ 1-0

[Event "Alkmaar ACCOM op"]
[Site "Alkmaar"]
[Date "1991.??.??"]
[Round "?"]
[White "Pronk, B."]
[Black "Den Boer, Henk"]
[Result "0-1"]
[ECO "D37"]
[PlyCount "76"]
[EventDate "1991.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Be7 4. Bf4 Nf6 5. Nc3 0-0 6. Bg5 a6 7. Qc2 dxc4 8. a4 Nc6 9. e3 Nb4 10. Qb1 h6 11. Bxf6 Bxf6 12. Bxc4 Bd7 13. 0-0 Be7 14. Ne5 Bc8 15. Nd3 Nd5 16. Nxd5 exd5 17. Bb3 c6 18. Bc2 Bd6 19. Ne1 Qc7 20. Nf3 Bg4 21. Qd1 Bxh2+ 22. Kh1 Bd6 23. Qd3 f5 24. Nh4 Qe7 25. g3 Qg5 26. f4 Qh5 27. Bd1 Rf6 28. Bxg4 Qxg4 29. Kg2 Re8 30. Rh1 g5 31. Nf3 gxf4 32. exf4 Bxf4 33. Rh3 Re3 34. Qf1 Rfe6 35. Re1 Rxe1 36. Nxe1 Re2+ 37. Kg1 Be3+ 38. Kh1 Rxe1 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "2"]
[White "Den Boer, Henk"]
[Black "Kemp, Rasmus"]
[Result "1-0"]
[ECO "D35"]
[PlyCount "107"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 h6 8. Bh4 Re8 9. Qc2 Nc6 10. a3 Ng4 11. Bxe7 Rxe7 12. Nf3 Be6 13. 0-0-0 a6 14. h3 Nf6 15. g4 Nd7 16. Rhg1 Nf8 17. h4 b5 18. Nxb5 Nb4 19. axb4 axb5 20. Bxb5 Qd6 21. Qc5 Rd8 22. Ne5 c6 23. Nxc6 Rc7 24. Kd2 Qxc5 25. bxc5 Rdc8 26. Na5 Rb8 27. Bd3 Rxb2+ 28. Bc2 Ng6 29. Kc3 Rb5 30. Bxg6 fxg6 31. Nb3 h5 32. g5 Bf5 33. Ra1 Re7 34. Nd2 Rb8 35. Ra2 Rf7 36. Rga1 Bg4 37. Nb3 Rf3 38. Rh1 Bd7 39. Nc1 Bf5 40. Nd3 Be4 41. Rh2 Rf7 42. f4 Re8 43. Ne5 Rb7 44. Rhb2 Rxb2 45. Rxb2 Ra8 46. c6 Rc8 47. Rb6 Bf5 48. Kb4 Kf8 49. Kc5 Ke7 50. Kxd5 Bc2 51. Kc4 Be4 52. d5 Ra8 53. Rb7+ Kd6 54. c7 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "4"]
[White "Den Boer, Henk"]
[Black "Smit, Wim"]
[Result "1-0"]
[ECO "E81"]
[PlyCount "69"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nbd7 7. Qd2 Re8 8. Nge2 c5 9. d5 Ne5 10. Ng3 e6 11. Be2 a6 12. 0-0 Kh8 13. Bg5 Ned7 14. Rad1 Qc7 15. dxe6 Rxe6 16. Bf4 Ne8 17. Nd5 Qc6 18. Nc3 Ndf6 19. Rfe1 Ng8 20. Bf1 b6 21. Rb1 Ra7 22. Nge2 Rd7 23. Nd5 b5 24. cxb5 axb5 25. Nec3 c4 26. b3 Rb7 27. bxc4 b4 28. Nb5 Qc5+ 29. Be3 Qc6 30. Rxb4 f5 31. Bd4 Ngf6 32. Bd3 Nxd5 33. cxd5 Bxd4+ 34. Nxd4 Qc5 35. Rc4 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "6"]
[White "Den Boer, Henk"]
[Black "Van der Sluijs, Lothar"]
[Result "0-1"]
[ECO "E88"]
[PlyCount "80"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 c6 8. Qd2 cxd5 9. cxd5 Ne8 10. Be2 f5 11. Rc1 a6 12. Na4 Nd7 13. b3 fxe4 14. fxe4 Qh4+ 15. Kd1 Qxe4 16. Bf3 Qf5 17. Ne2 b5 18. Ng3 Qf7 19. Bg4 Qe7 20. Nc3 Ndf6 21. Be2 Bb7 22. Bg5 Qd7 23. h4 Nc7 24. Bf3 Rae8 25. h5 b4 26. Na4 e4 27. Bxf6 exf3 28. Bxg7 Qxg7 29. hxg6 hxg6 30. gxf3 Bxd5 31. Kc2 Bxf3 32. Rcf1 Bxh1 33. Rxh1 Qe5 34. Qd3 Rf2+ 35. Kc1 Qa1+ 36. Qb1 Qxb1+ 37. Kxb1 Rg2 38. Rc1 Nb5 39. Nf1 Na3+ 40. Ka1 Ree2 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "5"]
[White "Posch, Jan"]
[Black "Den Boer, Henk"]
[Result "0-1"]
[ECO "C29"]
[PlyCount "70"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. f4 Nf6 4. fxe5 Nxe5 5. d4 Nc6 6. e5 Ng8 7. Nf3 d6 8. Bc4 Bg4 9. 0-0 Qd7 10. exd6 Bxd6 11. Qe1+ Nge7 12. Bxf7+ Kd8 13. Nb5 Bxf3 14. Be6 Qe8 15. Nxd6 cxd6 16. Rxf3 Nxd4 17. Rf1 Rf8 18. Qb4 Nxe6 19. Qxd6+ Qd7 20. Rxf8+ Nxf8 21. Bf4 Qxd6 22. Bxd6 Nfg6 23. Rd1 Ke8 24. Bb4 Rd8 25. Re1 Rd5 26. c4 Rd4 27. b3 b5 28. Bc3 Rd3 29. Bxg7 bxc4 30. bxc4 Rd2 31. a4 Kf7 32. Bc3 Rc2 33. Rf1+ Ke6 34. Rf6+ Kd7 35. Bd4 Nc6 0-1

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "1"]
[White "Van Beusekom, Leo"]
[Black "Den Boer, Henk"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "103"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 d6 6. Be3 Nf6 7. Be2 b5 8. f3 Bb7 9. 0-0 Nbd7 10. a4 b4 11. Na2 d5 12. c3 bxc3 13. Nxc3 dxe4 14. fxe4 Nxe4 15. Nxe4 Bxe4 16. Bf3 Bxf3 17. Qxf3 Ne5 18. Qg3 Ng6 19. Qf3 Ne5 20. Qh5 Ng6 21. Rad1 Qc7 22. Qf3 Rd8 23. Nxe6 fxe6 24. Rxd8+ Kxd8 25. Qa8+ Kd7 26. Rd1+ Bd6 27. Qxa6 Rb8 28. Qe2 Ke8 29. Qh5 Rxb2 30. Rf1 Qc2 31. Qf3 Ne5 32. Qh3 Qg6 33. Bd4 Rb1 34. Bxe5 Bxe5 35. Qe3 Rxf1+ 36. Kxf1 Qf6+ 37. Ke2 Bxh2 38. g3 Qb2+ 39. Kf1 Qa1+ 40. Kg2 Qb2+ 41. Kh3 e5 42. a5 Qa2 43. Qxe5+ Kf7 44. Qc7+ Kf6 45. Qb6+ Ke5 46. Qc7+ Kf6 47. Qc6+ Kg5 48. Qc5+ Kh6 49. Qb6+ g6 50. a6 Kh5 51. a7 g5 52. g4# 1-0

[Event "Haarlem ACCOM op2"]
[Site "Haarlem"]
[Date "1990.??.??"]
[Round "3"]
[White "Van Egmond, Joost"]
[Black "Den Boer, Henk"]
[Result "1-0"]
[ECO "B54"]
[PlyCount "63"]
[EventDate "1990.??.??"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 e6 6. Be2 b5 7. f4 Bb7 8. Bf3 Nd7 9. 0-0 Qc7 10. Kh1 Ngf6 11. Re1 Be7 12. e5 Ng8 13. exd6 Bxd6 14. Ndxb5 axb5 15. Nxb5 Qb6 16. Nxd6+ Kf8 17. Nxb7 Ngf6 18. Qd6+ Qxd6 19. Nxd6 Ra5 20. Bd2 Ra6 21. Ne4 Ne8 22. b4 h5 23. c4 h4 24. a4 h3 25. b5 hxg2+ 26. Kxg2 Ra7 27. c5 f5 28. Ng5 Nxc5 29. Bb4 Kg8 30. Bxc5 Rc7 31. Rxe6 Nf6 32. Re8+ 1-0

