[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.07.01"]
[Round "7"]
[White "Van Kempen, Roderick"]
[Black "Van der Heijden, Jaap"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1926"]
[BlackElo "1777"]
[PlyCount "76"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. b4 b6 4. c3 Nf6 5. bxc5 bxc5 6. Be2 g6 7. 0-0 Bb7 8. e5 Nfd7 9. e6 fxe6 10. Ng5 Bd5 11. c4 Bh6 12. cxd5 Bxg5 13. dxe6 Nf6 14. Qa4+ Kf8 15. f4 Bh6 16. Bf3 d5 17. Nc3 Qd6 18. f5 gxf5 19. Qb3 Nc6 20. Bxd5 Rb8 21. Qc4 Rb4 22. Qd3 Nd4 23. Bc4 Ng4 24. Rxf5+ Nxf5 25. Qxf5+ Nf6 26. d3 Qd4+ 27. Kh1 Bxc1 28. Rxc1 Qxc3 29. Qg5 Qd4 30. Qh6+ Ke8 31. Qg7 Rg8 32. Qf7+ Kd8 33. Rf1 Qf2 34. Rg1 Rb2 35. Bd5 Re2 36. h3 Re1 37. Rxe1 Qxe1+ 38. Kh2 Qe5+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.24"]
[Round "6"]
[White "Van der Heijden, Jaap"]
[Black "Nieuwland, Huib"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "1777"]
[BlackElo "1903"]
[PlyCount "66"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 c5 2. dxc5 e6 3. e4 Bxc5 4. Bd3 Nc6 5. Nf3 Nf6 6. Nc3 d5 7. exd5 Nxd5 8. Ne4 Be7 9. 0-0 0-0 10. c4 Nf6 11. Qe2 Nxe4 12. Qxe4 f5 13. Qe2 Bf6 14. Be3 e5 15. Rad1 Qe7 16. Bb1 Be6 17. Rfe1 Rae8 18. a3 g5 19. b4 g4 20. Bc5 gxf3 21. Qxf3 Qg7 22. Bxf8 Rxf8 23. b5 e4 24. Qg3 Nd4 25. Qxg7+ Kxg7 26. Rc1 Rc8 27. Ba2 Bg5 28. Rcd1 Bf6 29. Rc1 Kf7 30. Kf1 Bg5 31. Rcd1 Nc2 32. Re2 Nxa3 33. g4 Bxc4 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.17"]
[Round "5"]
[White "Duijnisveld, Arnold"]
[Black "Van der Heijden, Jaap"]
[Result "0-1"]
[ECO "B55"]
[WhiteElo "1544"]
[BlackElo "1777"]
[PlyCount "74"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 g6 6. c3 Bg7 7. 0-0 0-0 8. Nd2 Nc6 9. N2f3 Re8 10. Bg5 h6 11. Bh4 Qb6 12. Qb3 Qc7 13. Nb5 Qa5 14. Bc4 Nd8 15. e5 dxe5 16. Nxe5 Be6 17. Bxe6 Nxe6 18. Nxg6 Nc5 19. Qc4 Rac8 20. Ne5 Ne6 21. Qb3 a6 22. Nc4 Qxb5 23. Qxb5 axb5 24. Na3 Rc5 25. f3 Rd8 26. Bf2 Rcd5 27. c4 bxc4 28. Nxc4 b5 29. Ne3 Rd2 30. a4 bxa4 31. Rxa4 Rxb2 32. Ra7 Nd5 33. Nf5 Rc8 34. h3 Rcc2 35. Nxe7+ Nxe7 36. Rxe7 Rxf2 37. Rxf2 Bd4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.10"]
[Round "4"]
[White "Van der Heijden, Jaap"]
[Black "Bakker, Joop"]
[Result "0-1"]
[ECO "D07"]
[WhiteElo "1777"]
[BlackElo "1885"]
[PlyCount "56"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 4. Nf3 e5 5. Nc3 Bb4 6. Bd2 Bxc3 7. Bxc3 e4 8. Ne5 Nxe5 9. dxe5 Ne7 10. e3 0-0 11. Be2 Be6 12. 0-0 Rad8 13. Qa4 a6 14. Bb4 Qd7 15. Qa3 Rfe8 16. Rfd1 Nd5 17. Rd2 Qc8 18. Bc5 Nf4 19. Bd4 c5 20. Rc1 Nxe2+ 21. Rxe2 cxd4 22. Rxc8 Rxc8 23. f3 Rc1+ 24. Kf2 d3 25. Rd2 Rc2 26. Rxc2 dxc2 27. b3 Rc8 28. Qc1 a5 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.06.03"]
[Round "3"]
[White "Van Briemen, Willem Jan"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "D52"]
[WhiteElo "1947"]
[BlackElo "1777"]
[PlyCount "117"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 dxc4 8. Bxf6 Nxf6 9. Nxc4 Qc7 10. Rc1 Be7 11. Bd3 0-0 12. 0-0 c5 13. Ne5 cxd4 14. exd4 Qb6 15. Na4 Qa5 16. a3 Qd5 17. Nc3 Qd6 18. Re1 Re8 19. Ne4 Nxe4 20. Bxe4 f5 21. Qh5 Rf8 22. Bb1 Qxd4 23. Rc3 Qh4 24. Qxh4 Bxh4 25. Ba2 Re8 26. Rc7 Bd8 27. Rc2 Bf6 28. f4 Bxe5 29. Rxe5 g6 30. Rc7 h5 31. Kf2 Kf8 32. Rh7 Re7 33. Rh8+ Kg7 34. Rd8 b6 35. Bd5 Rb8 36. Bxe6 Rc7 37. Bb3 Rbb7 38. Rg8+ Kh6 39. Ree8 Kh7 40. Rxc8 Rd7 41. Rh8+ Kg7 42. Rcg8+ Kf6 43. Rf8+ Kg7 44. Rhg8+ Kh7 45. Re8 Rd2+ 46. Re2 Rd3 47. Ba2 Rc7 48. Rge8 Rdd7 49. Kg3 Kg7 50. Kh4 Kh6 51. R8e6 Rg7 52. Bb1 Rcf7 53. Rd6 Kh7 54. Kg5 Rc7 55. Ree6 Rc1 56. Ba2 Rc2 57. Bd5 Rxb2 58. Rxg6 Rc7 59. Rh6+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.27"]
[Round "2"]
[White "Van der Heijden, Jaap"]
[Black "Bingen, Stanley"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1777"]
[BlackElo "1306"]
[PlyCount "93"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Bg4 3. Ne5 Bh5 4. c4 f6 5. Nd3 dxc4 6. Qa4+ Nc6 7. Qxc4 Nxd4 8. e3 Bf7 9. Qxd4 Qxd4 10. exd4 0-0-0 11. Be3 e6 12. Nc3 Ne7 13. Be2 Nc6 14. Rc1 Nxd4 15. Bxd4 Rxd4 16. Nb5 Rd7 17. Nxa7+ Kb8 18. Nb5 e5 19. 0-0 Bxa2 20. b4 c6 21. Nc3 Bc4 22. Nc5 Bxc5 23. bxc5 Bf7 24. Rfd1 Rhd8 25. Ne4 Bd5 26. Nc3 Bb3 27. Rxd7 Rxd7 28. Rb1 Bc2 29. Rc1 Bg6 30. Rd1 Re7 31. Na4 Bc2 32. Ra1 Re8 33. Nb6 Kc7 34. Ra2 Bg6 35. Rd2 Kb8 36. Rd7 Rg8 37. Bc4 Rf8 38. Rxg7 Rd8 39. Rd7 Re8 40. Bf7 Rf8 41. Bxg6 hxg6 42. Kf1 g5 43. f3 Ka7 44. Ke2 Ka6 45. Ke3 Rb8 46. Rf7 Kb5 47. Rxf6 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2008.05.20"]
[Round "1"]
[White "Gorter, Yme"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2137"]
[BlackElo "1777"]
[PlyCount "35"]
[EventDate "2008.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5 Bxe3 7. fxe3 Qd8 8. Qg4 g6 9. Qf4 d6 10. Bc4 Be6 11. Bxe6 fxe6 12. 0-0 Kd7 13. N1c3 Nge7 14. Rad1 Rf8 15. Rxd6+ cxd6 16. Qxd6+ Ke8 17. Nc7+ Qxc7 18. Qxc7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.27"]
[Round "7"]
[White "Van Dorp, Teun"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "B26"]
[WhiteElo "1786"]
[BlackElo "1727"]
[PlyCount "49"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Be3 Nf6 7. h3 Qb6 8. Rb1 Be6 9. Qd2 Nd7 10. Nge2 Nd4 11. Nf4 0-0 12. Ncd5 Bxd5 13. Nxd5 Qd8 14. c3 Nc6 15. 0-0 e6 16. Nf4 Qe7 17. h4 Nde5 18. Qd1 Rac8 19. Nh3 f5 20. f3 h6 21. Qd2 Kh7 22. Rbc1 Rf7 23. Rc2 Rcf8 24. Qe2 Qd7 25. d4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.20"]
[Round "6"]
[White "Van der Heijden, Jaap"]
[Black "Hellenberg, Jan Amerik"]
[Result "0-1"]
[ECO "A42"]
[WhiteElo "1727"]
[BlackElo "1948"]
[PlyCount "46"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 g6 2. e4 Bg7 3. c4 d6 4. Nc3 Nd7 5. Be3 e5 6. d5 Ne7 7. Qd2 f5 8. Bh6 0-0 9. Bxg7 Kxg7 10. h4 Nf6 11. f3 fxe4 12. Nxe4 Nf5 13. Ne2 Nxe4 14. fxe4 Nxh4 15. 0-0-0 g5 16. g3 Nf3 17. Qe3 Bg4 18. Bh3 Qd7 19. Bg2 Rf6 20. Rdf1 Raf8 21. Bxf3 Bxf3 22. Qxg5+ Rg6 23. Qh4 Bxh1 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.13"]
[Round "5"]
[White "Van den Bosse, Bart"]
[Black "Van der Heijden, Jaap"]
[Result "1/2-1/2"]
[ECO "D51"]
[WhiteElo "1691"]
[BlackElo "1727"]
[PlyCount "21"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Nbd7 6. e4 dxe4 7. Nxe4 Qa5+ 8. Bd2 Bb4 9. Bxb4 Qxb4+ 10. Qd2 Qxd2+ 11. Nfxd2 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.06.06"]
[Round "4"]
[White "Van der Heijden, Jaap"]
[Black "Van Vliet, Harry"]
[Result "0-1"]
[ECO "D46"]
[WhiteElo "1727"]
[BlackElo "1761"]
[PlyCount "46"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. c4 c6 4. e3 Nf6 5. Bd3 Bd6 6. Nc3 Nbd7 7. 0-0 0-0 8. b3 Re8 9. Qc2 e5 10. cxd5 cxd5 11. dxe5 Nxe5 12. Nxe5 Bxe5 13. Bb2 Bxh2+ 14. Kxh2 Ng4+ 15. Kg3 Qg5 16. f4 Qh5 17. Bxh7+ Kh8 18. Nxd5 Qxd5 19. e4 Qd6 20. Rad1 Qb6 21. Rh1 Qe3+ 22. Kh4 Qxf4 23. Rdf1 Nf2+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.05.30"]
[Round "3"]
[White "Helfferich, Gert"]
[Black "Van der Heijden, Jaap"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "944"]
[BlackElo "1727"]
[PlyCount "36"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nc6 6. c3 Bc5 7. Nf3 h6 8. b4 Ba7 9. 0-0 Nf6 10. e5 Nd5 11. c4 Ndxb4 12. Be2 Ne7 13. a3 Nbc6 14. Bb2 Qc7 15. Re1 Qb6 16. Bd4 Nxd4 17. Nxd4 Qxd4 18. Qxd4 Bxd4 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.05.23"]
[Round "2"]
[White "Van der Heijden, Jaap"]
[Black "Gorter, Peter"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "1727"]
[BlackElo "1392"]
[PlyCount "133"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. a3 a6 6. Bg5 0-0 7. Nc3 Be7 8. Qd2 Nd4 9. Nxd4 exd4 10. Ne2 h6 11. Bh4 c5 12. g4 Nxg4 13. Bxe7 Qxe7 14. Rg1 Qh4 15. Ng3 Nxh2 16. Qe2 d6 17. 0-0-0 Bg4 18. Qd2 Nf3 19. Qf4 Nxg1 20. Rxg1 Qg5 21. Qxg5 hxg5 22. Nf1 Be6 23. Rxg5 Bxc4 24. dxc4 f6 25. Rd5 Rad8 26. Ng3 g6 27. Ne2 Kf7 28. c3 dxc3 29. Nxc3 Rh8 30. Rd3 Rh2 31. Rf3 Re8 32. Kd2 Ke6 33. Nd5 Rf8 34. Nf4+ Kf7 35. Nd5 Kg7 36. Nf4 Re8 37. Kd3 Rh1 38. Nd5 Rf8 39. Nf4 Rf7 40. Ne6+ Kh6 41. Nd8 Rf8 42. Ne6 Rf7 43. Nd8 Rd7 44. Ne6 f5 45. exf5 gxf5 46. Rxf5 Kg6 47. Rf3 Kh5 48. Rf5+ Kg4 49. Rg5+ Kf3 50. Rf5+ Kg2 51. f4 Re1 52. Rg5+ Kf2 53. f5 Re3+ 54. Kc2 Rf7 55. Nd8 Rfe7 56. f6 Re8 57. Nxb7 Rb8 58. Rf5+ Rf3 59. Rxf3+ Kxf3 60. f7 Rf8 61. Nxd6 Kf4 62. Nb7 Rxf7 63. Nxc5 a5 64. Kb3 Ke5 65. Ka4 Kd4 66. Kb5 Rf2 67. b4 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2006.05.16"]
[Round "1"]
[White "Van 't Hof, Eric"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2115"]
[BlackElo "1727"]
[PlyCount "33"]
[EventDate "2006.05.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c6 3. c4 dxc4 4. e3 b5 5. a4 Nd7 6. b3 cxb3 7. axb5 cxb5 8. Bxb5 Qb6 9. Qxb3 Rb8 10. Nc3 a6 11. Bxd7+ Bxd7 12. Qxb6 Rxb6 13. Nd5 Rd6 14. Nc7+ Kd8 15. Nxa6 e6 16. Nc5 Rc6 17. Ne5 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.07.01"]
[Round "7"]
[White "Van der Heijden, Jaap"]
[Black "Van de Peut, Aart A"]
[Result "0-1"]
[ECO "C07"]
[WhiteElo "1664"]
[BlackElo "1919"]
[PlyCount "36"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. c3 cxd4 5. cxd4 Nc6 6. Ngf3 Bb4 7. a3 Bxd2+ 8. Nxd2 dxe4 9. Nxe4 Qxd4 10. Qxd4 Nxd4 11. Nd6+ Ke7 12. Nxc8+ Rxc8 13. Rb1 Nf6 14. Be3 Nc2+ 15. Ke2 Nxe3 16. Kxe3 Rhd8 17. Bb5 Rc5 18. Ba4 Re5+ 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.17"]
[Round "5"]
[White "Van der Heijden, Jaap"]
[Black "Glimmerveen, Martin"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "1664"]
[BlackElo "1696"]
[PlyCount "123"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Be3 a6 8. Na3 b5 9. Nd5 Nxd5 10. exd5 Ne7 11. c4 bxc4 12. Bxc4 g6 13. 0-0 Bg7 14. Qd2 Nf5 15. f4 Nxe3 16. Qxe3 0-0 17. fxe5 dxe5 18. Rad1 Kh8 19. d6 f5 20. Bd5 Rb8 21. Nc4 Qe8 22. Qc5 Be6 23. Nb6 Bxd5 24. Rxd5 Qd8 25. Nc4 Rb5 26. Qc6 Rxd5 27. Qxd5 e4 28. Ne5 Qb6+ 29. Kh1 Qb5 30. Qxb5 axb5 31. Nc6 Bxb2 32. Rb1 Bf6 33. d7 Kg7 34. Rxb5 Kf7 35. a4 Ke6 36. Rb7 Ra8 37. a5 Kd6 38. Na7 f4 39. a6 e3 40. Kg1 Bd4 41. Nb5+ Kc5 42. Nxd4 Kxd4 43. a7 Ke4 44. Kf1 g5 45. d8Q Rxd8 46. Rb8 Rd1+ 47. Ke2 Rd2+ 48. Ke1 Ra2 49. a8Q+ Rxa8 50. Rxa8 Kf5 51. Ke2 Kg4 52. Rh8 h5 53. Rg8 Kf5 54. g3 h4 55. gxf4 Kxf4 56. Rf8+ Ke4 57. Re8+ Kf4 58. Rxe3 g4 59. Kf2 Kf5 60. h3 g3+ 61. Kf3 Kg5 62. Re4 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.10"]
[Round "4"]
[White "Compagnie, Luc G"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2128"]
[BlackElo "1664"]
[PlyCount "65"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4 Nf6 5. Nge2 Bg4 6. f3 Bc8 7. Be3 Nbd7 8. Qd2 c5 9. d5 a6 10. Bh6 Bxh6 11. Qxh6 Ne5 12. Ng3 Qb6 13. Qd2 Qb4 14. b3 0-0 15. Be2 Rb8 16. f4 Ned7 17. 0-0 Qa5 18. Qe3 Qc7 19. Rae1 Re8 20. Bd1 Nf8 21. e5 Ng4 22. exd6 Qxd6 23. Bxg4 Bxg4 24. Nce4 Qc7 25. Nxc5 e6 26. Nce4 Nd7 27. dxe6 Rxe6 28. Qf2 Nf6 29. Nxf6+ Rxf6 30. Ne4 Re6 31. Qh4 f5 32. Nf6+ Kf7 33. Qxh7+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.06.03"]
[Round "3"]
[White "Van der Heijden, Jaap"]
[Black "Sonneveldt, Peter"]
[Result "1-0"]
[ECO "C61"]
[WhiteElo "1664"]
[BlackElo "1647"]
[PlyCount "86"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. c3 Bc5 6. d3 Ne7 7. Bg5 0-0 8. 0-0 f6 9. Bf4 Ng6 10. Bc4+ Kh8 11. Bg3 d6 12. a4 a6 13. b4 Ba7 14. Qd2 Qe7 15. Na3 Bd7 16. Nc2 dxc3 17. Qxc3 Ne5 18. Bb3 c6 19. Nd4 f5 20. exf5 Bxf5 21. Nxf5 Rxf5 22. d4 Ng6 23. Rae1 Qf8 24. Re6 Rd8 25. Rfe1 Nf4 26. Re7 Nd5 27. Bxd5 Rxd5 28. Rxb7 Bxd4 29. Qxc6 Rf5 30. Qxa6 Rxf2 31. Kh1 Rf5 32. Qd3 Be5 33. Rb5 Qf6 34. Rd5 Rf8 35. Rg1 h5 36. Bxe5 dxe5 37. a5 Rf4 38. b5 Rh4 39. b6 e4 40. Qg3 Kg8 41. Rd6 Qe7 42. b7 Rg4 43. Qb3+ Kh7 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2003.05.27"]
[Round "2"]
[White "Gorter, Yme"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1781"]
[BlackElo "1664"]
[PlyCount "53"]
[EventDate "2003.05.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. Nge2 Nc6 6. f3 Na5 7. Bb3 0-0 8. Be3 Nxb3 9. axb3 Nd7 10. Qd2 Re8 11. h4 c5 12. h5 cxd4 13. Nxd4 Ne5 14. Bh6 Bh8 15. f4 Ng4 16. hxg6 fxg6 17. f5 Qb6 18. Nf3 Bg7 19. Bxg7 Kxg7 20. Nd5 Qc5 21. Qg5 Qxc2 22. Qxg4 Qxb2 23. Rxh7+ Kxh7 24. Qxg6+ Kh8 25. Qxe8+ Kg7 26. Qxe7+ Kh6 27. Qg5+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2002.07.02"]
[Round "7"]
[White "Blom, Jaap"]
[Black "Van der Heijden, Jaap"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "80"]
[EventDate "2002.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 Bg7 5. Be3 c6 6. Qd2 b5 7. a3 0-0 8. f4 Bb7 9. Bf3 Qc7 10. Nge2 a5 11. Ng3 b4 12. Nce2 c5 13. h4 h5 14. f5 Nbd7 15. Nf4 Kh7 16. fxg6+ fxg6 17. Ne6 Qc8 18. Nxg7 Kxg7 19. Bh6+ Kh7 20. Bxf8 Nxf8 21. Rc1 Qe6 22. 0-0 Qc4 23. Qd3 Qe6 24. Qb3 Qd7 25. dxc5 dxc5 26. Qf7+ Kh8 27. e5 Qd4+ 28. Rf2 Qxe5 29. Bxb7 Rb8 30. Re2 Qd4+ 31. Rf2 Ng4 32. Bd5 Nf6 33. Bb3 N8d7 34. Qxg6 c4 35. Qh6+ Nh7 36. Ba4 Rf8 37. Rcf1 Rf6 38. Qxh5 Ne5 39. Qe8+ Rf8 40. Qh5 Ng4 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2002.06.25"]
[Round "6"]
[White "Ruijgrok, Dennis"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "2113"]
[PlyCount "59"]
[EventDate "2002.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 c5 6. d5 h6 7. 0-0 0-0 8. h3 a6 9. a4 e6 10. a5 exd5 11. exd5 Re8 12. Bf4 Qc7 13. Nd2 Nbd7 14. Nc4 Bf8 15. Re1 Ne5 16. Nb6 Rb8 17. Bh2 Ned7 18. Nca4 Nxb6 19. Nxb6 Nd7 20. Nc4 Ne5 21. Bd3 Bd7 22. Ne3 Nxd3 23. Qxd3 Bg7 24. Nc4 Rxe1+ 25. Rxe1 Bf8 26. Qd2 Bb5 27. Nb6 Re8 28. Rxe8 Bxe8 29. Qe3 f6 30. Qxe8 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2002.06.18"]
[Round "5"]
[White "Van der Heijden, Jaap"]
[Black "De Mooij, Marco"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "116"]
[EventDate "2002.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be6 10. Nxf6+ gxf6 11. Bh4 Rc8 12. c3 Bg7 13. Nc2 Qd7 14. Ne3 Ne7 15. Qf3 f5 16. Bxe7 Qxe7 17. Nxf5 Bxf5 18. Qxf5 0-0 19. Be2 Rc6 20. 0-0 Qb7 21. Rfd1 a5 22. Rd5 b4 23. cxb4 Qxb4 24. b3 Rc5 25. Bc4 Qc3 26. Rad1 Rxd5 27. Bxd5 Qc2 28. Qf3 Qxa2 29. b4 Qa4 30. bxa5 Qxa5 31. h3 Qa7 32. Bb3 Rd8 33. Bd5 Rf8 34. Rb1 Qe7 35. Rb7 Qe8 36. Kh2 Kh8 37. Rxf7 Rxf7 38. Qxf7 Qxf7 39. Bxf7 Bh6 40. Kg3 Kg7 41. Bd5 Bd2 42. Kg4 Kf6 43. g3 Be1 44. f4 exf4 45. Kxf4 Bd2+ 46. Kf3 h6 47. Ke2 Bc1 48. h4 Ke5 49. Kf3 Kf6 50. Kg4 Be3 51. Bb7 Bc1 52. Bc8 Bd2 53. Kf3 Bc1 54. Ke2 Ke5 55. Bf5 d5 56. Kd3 dxe4+ 57. Bxe4 Kf6 58. Bf3 Ba3 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2002.06.11"]
[Round "4"]
[White "Agaian, Jura"]
[Black "Van der Heijden, Jaap"]
[Result "1-0"]
[ECO "C92"]
[WhiteElo "1832"]
[PlyCount "59"]
[EventDate "2002.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 0-0 8. d4 d6 9. h3 Bb7 10. c3 exd4 11. cxd4 Na5 12. Bc2 Re8 13. b3 Nc6 14. Nbd2 Bf8 15. Bb2 Nb4 16. Bb1 c5 17. d5 a5 18. Nf1 Na6 19. Ng3 Bc8 20. Qd2 Nb8 21. Bd3 b4 22. Qg5 Nbd7 23. Nf5 Kh8 24. Qh4 Ne5 25. Ng5 Bxf5 26. exf5 Re7 27. f4 Ned7 28. Bb5 h6 29. Rxe7 Qxe7 30. Re1 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2002.05.21"]
[Round "1"]
[White "Van der Heijden, Jaap"]
[Black "Vermeend, Joost"]
[Result "0-1"]
[ECO "B01"]
[BlackElo "1766"]
[PlyCount "54"]
[EventDate "2002.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d3 Nf6 5. Bd2 Qb6 6. Na4 Qb5 7. c4 Qe5+ 8. Be3 Ng4 9. d4 Nxe3 10. dxe5 Nxd1 11. Rxd1 Nc6 12. f4 Bf5 13. Nc5 e6 14. Nd3 Nd4 15. Ne2 Nc2+ 16. Kf2 0-0-0 17. Ng3 Bc5+ 18. Ke2 Bg4+ 19. Kd2 Bxd1 20. Kxd1 Nb4 21. Kd2 Rd4 22. Kc3 Nxd3 23. Bxd3 Rhd8 24. Bxh7 g6 25. b4 Rd3+ 26. Kc2 Rd2+ 27. Kc3 R8d3# 0-1

