[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.06"]
[Round "6.4"]
[White "De Jong, Jan Willem"]
[Black "Ondersteijn, Niels"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2412"]
[BlackElo "2370"]
[PlyCount "169"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Paul Keres"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nc6 7. 0-0 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qxd8 Rxd8 11. Bg5 Rd7 12. h3 c6 13. b3 h6 14. Be3 Bf8 15. Na4 Kg7 16. Rad1 Rxd1 17. Rxd1 Nd7 18. f4 exf4 19. Bd4+ Kg8 20. gxf4 Be7 21. e3 Kf8 22. Kf2 Ke8 23. e4 Nf8 24. Bc5 Ne6 25. Bxe7 Kxe7 26. Ke3 g5 27. f5 Nf4 28. Bf3 Rb8 29. h4 b5 30. cxb5 Rxb5 31. hxg5 hxg5 32. Bg4 f6 33. Rc1 Re5 34. Rh1 Ng2+ 35. Kd4 Nh4 36. Nc5 Kd6 37. b4 a5 38. a3 Re7 39. Rb1 axb4 40. Rxb4 Re5 41. Rc4 Nxf5+ 42. Bxf5 Bxf5 43. Nb7+ Kc7 44. Nc5 Bc8 45. Rc1 Kd6 46. Nd3 Ra5 47. Rc3 Ra4+ 48. Ke3 Ra5 49. Kd4 Ra4+ 50. Ke3 f5 51. exf5 Bxf5 52. Nc5 Rh4 53. Kf2 Rh2+ 54. Kg1 Rc2 55. Nb7+ Kc7 56. Rf3 Be6 57. Re3 Kxb7 58. Rxe6 Kb6 59. Kf1 Kb5 60. Re5+ Rc5 61. Re4 Rd5 62. Ke2 c5 63. a4+ Kb6 64. Ke3 Rd1 65. Rg4 Rd5 66. Re4 Rd6 67. Re5 g4 68. Rg5 Rd4 69. a5+ Kb5 70. a6 Ra4 71. Kd3 g3 72. Kc2 g2 73. Kb2 Rb4+ 74. Kc2 Kxa6 75. Rxg2 Kb5 76. Rg3 Rc4+ 77. Kb3 Ra4 78. Rh3 Rb4+ 79. Kc3 Ka4 80. Rh8 Rg4 81. Rb8 Rb4 82. Ra8+ Kb5 83. Rb8+ Kc6 84. Rxb4 cxb4+ 85. Kxb4 1/2-1/2

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.03"]
[Round "3.3"]
[White "De Jong, Jan Willem"]
[Black "Carnicelli, Valerio"]
[Result "0-1"]
[ECO "E69"]
[WhiteElo "2412"]
[BlackElo "2403"]
[PlyCount "66"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Padova Obiettivo"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ITA"]

1. c4 Nf6 2. Nc3 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 d6 6. d4 Nbd7 7. 0-0 e5 8. e4 exd4 9. Nxd4 Re8 10. h3 Nc5 11. Re1 h6 12. Rb1 a5 13. Ndb5 Bf8 14. b3 c6 15. Nd4 Bg7 16. a3 Nh7 17. b4 axb4 18. axb4 Ne6 19. Nxe6 Bxe6 20. Qd3 Ng5 21. h4 Nh3+ 22. Bxh3 Bxh3 23. Bb2 Bg4 24. f3 Be6 25. Ne2 Ra2 26. Bxg7 Kxg7 27. Nc1 Ra4 28. Rd1 Qf6 29. Qd4 Rea8 30. Kf2 Ra1 31. Rxa1 Rxa1 32. Ke3 Rb1 33. c5 Qxd4+ 0-1

[Event "EU-Cup 38th"]
[Site "Durres"]
[Date "2023.10.01"]
[Round "1.3"]
[White "De Jong, Jan Willem"]
[Black "Cahen, Alexis"]
[Result "1-0"]
[ECO "A37"]
[WhiteElo "2412"]
[BlackElo "2049"]
[PlyCount "83"]
[EventDate "2023.10.01"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "ALB"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Differdange"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "LUX"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 e5 6. a3 a5 7. d3 Nge7 8. 0-0 0-0 9. Ne1 d6 10. Nc2 Be6 11. Ne3 Qd7 12. Ned5 Rab8 13. Rb1 Bh3 14. Bd2 Bxg2 15. Kxg2 Nxd5 16. Nxd5 b5 17. b4 axb4 18. axb4 cxb4 19. Bxb4 Rfc8 20. Ba3 Qe6 21. Ne3 Bh6 22. cxb5 Nd4 23. b6 Rc6 24. b7 Ra6 25. Nc4 Bf8 26. e3 Qd5+ 27. e4 Qc6 28. Bb2 Rxb7 29. Bxd4 Rxb1 30. Qxb1 exd4 31. Rc1 Qa4 32. Qb2 Bg7 33. Nb6 Qa5 34. Rc8+ Bf8 35. Nd7 Ra8 36. Qb7 Ra7 37. Rxf8+ Kg7 38. Rg8+ Kh6 39. Qc8 Qd2 40. Ne5 Qe2 41. Qh3+ Qh5 42. Ng4+ 1-0

[Event "NED-chT 2324"]
[Site "Netherlands"]
[Date "2023.09.16"]
[Round "1.10"]
[White "De Jong, Jan Willem"]
[Black "Grutter, Tim"]
[Result "1-0"]
[ECO "A22"]
[WhiteElo "2408"]
[BlackElo "2337"]
[PlyCount "81"]
[EventDate "2023.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden IntelliMagic"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 Nf6 2. Nc3 e5 3. Nf3 e4 4. Ng5 c6 5. Qa4 Qe7 6. Qc2 b5 7. cxb5 d5 8. e3 Qe5 9. f4 Qc7 10. b3 h6 11. Nh3 a6 12. Bb2 cxb5 13. Rc1 Bxh3 14. gxh3 Qb7 15. Ne2 Nbd7 16. Rg1 Nc5 17. Nd4 Rc8 18. Kd1 Rc7 19. Nf5 Qc8 20. Be5 Qxf5 21. Bxc7 Nfd7 22. Be2 Qxh3 23. b4 Qxh2 24. Re1 Ne6 25. Qc6 Nxc7 26. Qxc7 Be7 27. Qb7 Qh3 28. Rc8+ Bd8 29. Rxd8+ Kxd8 30. Qa8+ Nb8 31. Qxb8+ Qc8 32. Qe5 Qe6 33. Qxg7 Re8 34. Rh1 Qd6 35. a3 Re6 36. Qxf7 d4 37. Rg1 Re7 38. Rg8+ Kc7 39. Qf8 dxe3 40. Qb8+ Kc6 41. Rc8+ 1-0

[Event "NED-ch Blitz Pool-B"]
[Site "Rotterdam"]
[Date "2023.09.09"]
[Round "4"]
[White "Beerdsen, Thomas"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "C29"]
[WhiteElo "2516"]
[BlackElo "2408"]
[PlyCount "37"]
[EventDate "2023.09.09"]
[EventType "tourn (blitz)"]
[EventRounds "5"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Nf3 Bc5 6. d4 Bb4 7. a3 Bxc3+ 8. bxc3 Nxc3 9. Qd3 Ne4 10. Be2 b6 11. c4 Ba6 12. Qe3 0-0 13. 0-0 f5 14. exf6 Rxf6 15. Bd3 Nd7 16. cxd5 Bxd3 17. Qxd3 Qe7 18. Re1 Re8 19. Ng5 1-0

[Event "NED-ch Blitz Pool-B"]
[Site "Rotterdam"]
[Date "2023.09.09"]
[Round "2"]
[White "De Jong, Jan Willem"]
[Black "Van Tellingen, Frank"]
[Result "0-1"]
[ECO "D94"]
[WhiteElo "2408"]
[BlackElo "2279"]
[PlyCount "72"]
[EventDate "2023.09.09"]
[EventType "tourn (blitz)"]
[EventRounds "5"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Nf3 Bg7 6. e3 0-0 7. Bc4 Nb6 8. Bb3 Nc6 9. 0-0 e5 10. d5 Na5 11. Bc2 c6 12. e4 cxd5 13. exd5 Nac4 14. Re1 f5 15. Bg5 Bf6 16. Bxf6 Qxf6 17. b3 e4 18. Nd4 Ne5 19. Qd2 Bd7 20. Rad1 Rae8 21. Ndb5 Bxb5 22. Nxb5 Rd8 23. d6 a6 24. Nc7 Rd7 25. b4 Nbc4 26. Bb3 Kh8 27. Bxc4 Nxc4 28. Qd5 b5 29. Qc5 Rxd6 30. a4 Rfd8 31. Rxd6 Qxd6 32. axb5 Qd2 33. Rf1 e3 34. Qxc4 e2 35. bxa6 e1Q 36. a7 Qdxf2+ 0-1

[Event "NED-ch Blitz Pool-B"]
[Site "Rotterdam"]
[Date "2023.09.09"]
[Round "5"]
[White "De Jong, Jan Willem"]
[Black "Zult, Daan"]
[Result "1/2-1/2"]
[ECO "D27"]
[WhiteElo "2408"]
[BlackElo "2303"]
[PlyCount "105"]
[EventDate "2023.09.09"]
[EventType "tourn (blitz)"]
[EventRounds "5"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 a6 6. 0-0 c5 7. Be2 b6 8. b3 Bb7 9. Bb2 Nbd7 10. Nbd2 Be7 11. Rc1 0-0 12. Ne5 Nxe5 13. dxe5 Nd5 14. Nc4 Qc7 15. Qc2 b5 16. Nd6 Bxd6 17. exd6 Qxd6 18. Qxc5 Qxc5 19. Rxc5 Rfc8 20. Rfc1 Rxc5 21. Rxc5 Rc8 22. Rxc8+ Bxc8 23. Kf1 f6 24. Ke1 e5 25. Kd2 Kf7 26. g3 Ke6 27. Bg4+ f5 28. Be2 g6 29. f4 exf4 30. exf4 Nf6 31. Kc3 Ne4+ 32. Kd4 Bb7 33. a4 bxa4 34. Bc4+ Kf6 35. bxa4 Bc8 36. a5 Bb7 37. Bb3 h6 38. Ke3+ Ke7 39. Ba3+ Kf6 40. Bf8 h5 41. Bc4 Bc8 42. Ba3 Bb7 43. Bb4 Bc8 44. Bd5 Bd7 45. Bc4 Bc8 46. Be1 Bb7 47. Kd4 Bc8 48. Bb4 Bb7 49. Ba3 Bc8 50. Bb2 Bb7 51. Bd5 Bc8 52. Bc6 Ke6 53. Be8 1/2-1/2

[Event "NED-ch Blitz Pool-B"]
[Site "Rotterdam"]
[Date "2023.09.09"]
[Round "1"]
[White "Lombaers, Peter"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D46"]
[WhiteElo "2372"]
[BlackElo "2408"]
[PlyCount "106"]
[EventDate "2023.09.09"]
[EventType "tourn (blitz)"]
[EventRounds "5"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 0-0 9. 0-0 e5 10. h3 exd4 11. exd4 Nb6 12. Bb3 h6 13. Ne5 Nfd5 14. Bd2 Qh4 15. Rae1 Qxd4 16. Re4 Bxe5 17. Rxd4 Bxd4 18. Rd1 Be5 19. Ne4 Re8 20. Nc5 a5 21. a3 a4 22. Ba2 Bf6 23. Bb1 g6 24. Bxh6 Bf5 25. Qc1 Bxb1 26. Qxb1 Re2 27. Rd2 Rxd2 28. Bxd2 Nc4 29. Ne4 Bxb2 30. Bg5 Re8 31. Qc2 b5 32. Nd6 Re1+ 33. Kh2 Be5+ 34. g3 Bxd6 35. Bh6 Be5 36. Qd3 Ra1 37. Qf3 f6 38. Qe4 Kf7 39. h4 Ra2 40. h5 Rxf2+ 41. Kg1 Rf5 42. hxg6+ Ke6 43. g7 Nc3 44. Qxc6+ Kf7 45. g8Q+ Kxg8 46. Qe8+ Kh7 47. Bc1 Ne2+ 48. Kg2 Nxc1 49. Qf7+ Kh6 50. Qf8+ Kg6 51. Qg8+ Kh6 52. Qh8+ Kg6 53. Qg8+ Kh6 1/2-1/2

[Event "NED-ch Blitz Pool-B"]
[Site "Rotterdam"]
[Date "2023.09.09"]
[Round "3"]
[White "Pham, Khoi"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D17"]
[WhiteElo "2361"]
[BlackElo "2408"]
[PlyCount "116"]
[EventDate "2023.09.09"]
[EventType "tourn (blitz)"]
[EventRounds "5"]
[EventCountry "NED"]
[EventCategory "5"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Bg2 f6 12. 0-0 Rd8 13. Nxe5 Nxe5 14. Qb3 Qf7 15. Qxf7+ Kxf7 16. Rfd1 Bb4 17. Ne4 a5 18. Rac1 Be6 19. Bxe5 fxe5 20. Ng5+ Ke7 21. Nxe6 Kxe6 22. Be4 h6 23. Kg2 Rd2 24. Rxd2 Bxd2 25. Rd1 Rd8 26. Bd3 Bb4 27. Bc4+ Ke7 28. Rxd8 Kxd8 29. Kf3 Ke7 30. Ke4 Be1 31. f4 exf4 32. gxf4 g5 33. f5 Kf6 34. Be6 b6 35. Bd7 g4 36. Kf4 h5 37. Bxc6 Bd2+ 38. Ke4 Bc1 39. b3 Ba3 40. Be8 Kg5 41. f6 Kxf6 42. Bxh5 Kg5 43. Be8 Bd6 44. Ke3 Bc5+ 45. Kd3 Bd6 46. Ke3 Bxh2 47. Bc6 Bg1+ 48. Kd3 Kf4 49. e4 g3 50. Ke2 Bc5 51. Kf1 Bd6 52. Kg2 Ke3 53. Bd5 Kd4 54. Kf1 Kc5 55. Kg2 Kb4 56. Kf1 Be5 57. Kg2 Kc5 58. Kf1 Kb4 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.22"]
[Round "9.4"]
[White "Fier, Alexandr"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "C24"]
[WhiteElo "2599"]
[BlackElo "2407"]
[PlyCount "125"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn Amevo"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 d5 5. exd5 Nxd5 6. 0-0 Be7 7. Re1 f6 8. d4 Nb6 9. Bb3 Nxd4 10. Nxd4 Qxd4 11. Qxd4 exd4 12. Bf4 Bf5 13. Bxc7 Kd7 14. Bxb6 axb6 15. Nd2 Bc5 16. Nf3 Bg4 17. Re4 Bxf3 18. gxf3 Rhe8 19. Rae1 Rxe4 20. fxe4 Kd6 21. Kg2 Re8 22. f4 g5 23. Kf3 gxf4 24. Kxf4 Re5 25. Rg1 Rh5 26. Rg2 Rh3 27. Bc4 Bb4 28. a3 Be1 29. Re2 Re3 30. Rxe3 dxe3 31. Kxe3 Ke5 32. Bd5 f5 33. Bxb7 fxe4 34. Bxe4 h6 35. Kd3 Bh4 36. Bb7 Kd6 37. Kc4 Bf6 38. b4 Kc7 39. Bf3 Be5 40. h4 h5 41. Kb5 Bg3 42. a4 Bxh4 43. Bxh5 Bd8 44. a5 bxa5 45. Kxa5 Kc6+ 46. Ka6 Kd5 47. Bf7+ Kc6 48. c4 Be7 49. Be8+ Kc7 50. c5 Bf8 51. Kb5 Bh6 52. Kc4 Kd8 53. Bh5 Kc7 54. b5 Be3 55. b6+ Kb7 56. Kb5 Kb8 57. c6 Bf4 58. Bg4 Bg3 59. Kc4 Bf4 60. Kd5 Bg3 61. Ke6 Kc8 62. Ke7+ Kb8 63. Kd7 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.04.01"]
[Round "8.9"]
[White "Roebers, Eline"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C33"]
[WhiteElo "2363"]
[BlackElo "2407"]
[PlyCount "114"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Kennemer Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. f4 exf4 3. Bc4 d5 4. Bxd5 Nf6 5. Nc3 Nxd5 6. Nxd5 g5 7. h4 c6 8. Nc3 Bc5 9. Qf3 Na6 10. Nge2 Nb4 11. Kd1 h5 12. hxg5 Qxg5 13. Qxf4 Qxg2 14. Qe5+ Kd7 15. Qh2 Qxh2 16. Rxh2 Bd6 17. Rh1 f5 18. a3 Na6 19. d4 fxe4 20. Nxe4 Be7 21. Bf4 b6 22. Be5 Rh7 23. Nf4 h4 24. Kd2 Bb7 25. Rag1 Nc7 26. c4 Ne6 27. Nd3 Rf8 28. Ke3 Bc8 29. Bh2 Bb7 30. Rg6 Nd8 31. Ne5+ Ke8 32. c5 Bc8 33. b4 Bf5 34. Rgg1 Be6 35. Rf1 Bd5 36. Rxf8+ Kxf8 37. Rf1+ Kg8 38. Ng4 Bxe4 39. Kxe4 h3 40. Ne5 Rg7 41. Rf3 Rh7 42. Rg3+ Kf8 43. Rg6 bxc5 44. bxc5 Rg7 45. Rh6 Nf7 46. Nxf7 Kxf7 47. Be5 Rg4+ 48. Kf5 Rh4 49. Rxc6 h2 50. Bxh2 Rxh2 51. Rc7 Rh5+ 52. Ke4 Ke8 53. d5 Rh4+ 54. Ke5 Rh5+ 55. Kd4 Rh4+ 56. Ke5 Rh5+ 57. Kd4 Rh4+ 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.03.11"]
[Round "7.10"]
[White "Ondersteijn, Niels"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "2382"]
[BlackElo "2407"]
[PlyCount "40"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Paul Keres"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 Bf5 5. cxd5 cxd5 6. Qb3 Nc6 7. Qxb7 Bd7 8. Qb3 Rb8 9. Qd1 e5 10. dxe5 Nxe5 11. Be2 Bd6 12. Nf3 Nxf3+ 13. Bxf3 Qc7 14. a4 0-0 15. h3 Rfd8 16. 0-0 Bh2+ 17. Kh1 Be5 18. Nb5 Bxb5 19. axb5 Rxb5 20. Qa4 Rdb8 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2023.02.11"]
[Round "6.3"]
[White "Meng, Roger"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D23"]
[WhiteElo "2449"]
[BlackElo "2407"]
[PlyCount "56"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Charlois Europoort"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Qc2 dxc4 5. Qxc4 Bf5 6. g3 e6 7. Bg2 Be7 8. 0-0 0-0 9. Rd1 Nbd7 10. e3 Rc8 11. Qe2 Bg6 12. Nc3 b5 13. Ne5 Nxe5 14. dxe5 Nd7 15. a4 b4 16. Ne4 Bxe4 17. Bxe4 Qc7 18. Qc2 g6 19. f4 c5 20. b3 c4 21. bxc4 Nb6 22. Bb2 Nxc4 23. Bd4 Na5 24. Qxc7 Rxc7 25. Rdc1 Rfc8 26. Rxc7 Rxc7 27. Rb1 b3 28. Bd3 h5 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.12.17"]
[Round "5.9"]
[White "De Jong, Jan Willem"]
[Black "Bijlsma, Nick"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "2407"]
[BlackElo "2292"]
[PlyCount "81"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "De Stukkenjagers"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 dxc4 3. e4 Nf6 4. e5 Nd5 5. Bxc4 Nb6 6. Bd3 Nc6 7. Be3 Nb4 8. Be4 f5 9. exf6 exf6 10. Nc3 f5 11. Bb1 c6 12. Nf3 Be7 13. 0-0 0-0 14. a3 N4d5 15. Ba2 f4 16. Bd2 Bg4 17. Re1 Rf7 18. Ne4 a5 19. Qb3 a4 20. Qd3 Bxf3 21. Qxf3 Bf6 22. Qd3 f3 23. Qxf3 Bxd4 24. Qd3 Bf6 25. Rad1 Kh8 26. Qg3 Rd7 27. Bc1 Qf8 28. Ng5 Re8 29. h4 Rde7 30. Rxe7 Qxe7 31. Qd3 g6 32. Kf1 Qg7 33. Bb1 Nd7 34. h5 Ne5 35. Qh3 Bxg5 36. Bxg5 Qd7 37. Qxd7 Nxd7 38. hxg6 hxg6 39. Bxg6 Rg8 40. Bf5 Ne5 41. Rxd5 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.26"]
[Round "4.8"]
[White "Gallasch, Jonas"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2275"]
[BlackElo "2407"]
[PlyCount "34"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Zuid Limburg"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nb6 7. Be3 0-0 8. h3 e5 9. dxe5 Bxe5 10. Qc1 Nc6 11. Nf3 Bg7 12. Bb5 Nd4 13. Nxd4 Bxd4 14. 0-0 c6 15. Rd1 Bxe3 16. Qxe3 Qe7 17. Be2 Be6 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.11.05"]
[Round "3.8"]
[White "De Jong, Jan Willem"]
[Black "Decrop, Benjamin"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "2407"]
[BlackElo "2239"]
[PlyCount "47"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. d5 0-0 6. e4 b5 7. Bd2 bxc4 8. Bxc4 Ba6 9. Bxa6 Nxa6 10. Nge2 exd5 11. e5 Ne8 12. Nxd5 d6 13. exd6 Nxd6 14. Bxb4 Nxb4 15. Nxb4 cxb4 16. Kf2 Rc8 17. Qd4 Rc4 18. Qxa7 Re8 19. Rad1 Qh4+ 20. g3 Ne4+ 21. Kg2 Qh5 22. Rhe1 Rc2 23. Qa4 Rec8 24. Qxc2 1-0

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.10.08"]
[Round "2.8"]
[White "Hilwerda, Jonas"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2289"]
[BlackElo "2407"]
[PlyCount "102"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Nb6 9. Nc3 Ba6 10. Qe4 f6 11. c5 Bxf1 12. Kxf1 Qxc5 13. exf6+ Kf7 14. fxg7 Bxg7 15. h4 Qc4+ 16. Qxc4+ Nxc4 17. Rh3 a5 18. Rf3+ Ke8 19. Bg5 d6 20. h5 h6 21. Re1+ Ne5 22. Bc1 Rf8 23. Rg3 Kf7 24. f4 Nd7 25. Rg6 Rfe8 26. Ne4 a4 27. f5 d5 28. Bxh6 Bxh6 29. Rxh6 dxe4 30. Rh7+ Kf6 31. Rxd7 Kxf5 32. Rf7+ Kg5 33. Rg7+ Kf4 34. Rf7+ Kg5 35. Rg7+ Kf4 36. Rf7+ Kg5 37. Re3 Rf8 38. Rxf8 Rxf8+ 39. Ke2 Rb8 40. b3 Kxh5 41. bxa4 Rb2+ 42. Kf1 Rxa2 43. Rxe4 Kg5 44. g4 Kh4 45. Ke1 Kg3 46. Kd1 Kf3 47. Rc4 Ke3 48. Kc1 Kd3 49. Kb1 Rg2 50. Rxc6 Rxg4 51. Rxc7 Rxa4 1/2-1/2

[Event "NED-chT 2223"]
[Site "Netherlands"]
[Date "2022.09.17"]
[Round "1.8"]
[White "De Jong, Jan Willem"]
[Black "Jacobs, Florian"]
[Result "0-1"]
[ECO "E35"]
[WhiteElo "2407"]
[BlackElo "2266"]
[PlyCount "118"]
[EventDate "2022.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 213 Extra"]
[Source "ChessBase"]
[SourceDate "2023.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.05.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Amstelveen Zukertort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 h6 7. Bh4 0-0 8. e3 Re8 9. Nf3 c5 10. dxc5 Nc6 11. Be2 Be6 12. 0-0 Bxc5 13. Rfd1 Be7 14. Nd4 Nxd4 15. Rxd4 Qb6 16. Rad1 Rac8 17. Qb1 Red8 18. Bd3 a6 19. Bh7+ Kf8 20. Bc2 Rc4 21. Bb3 Rxd4 22. Rxd4 Qc6 23. Rd1 b5 24. Ne2 Bg4 25. Nd4 Qd7 26. f3 Be6 27. Qd3 Rc8 28. Qd2 Kg8 29. Bf2 Bf5 30. Qa5 Ra8 31. Nxf5 Qxf5 32. Qc7 Bf8 33. Rc1 Re8 34. e4 Qg5 35. h4 Qd2 36. Rd1 Qb4 37. e5 Re7 38. Qb8 Nd7 39. Qd8 Nxe5 40. Qxd5 Nc4 41. Qa8 Re2 42. Rd8 Qe7 43. Bxc4 bxc4 44. Rc8 Rxb2 45. Qa7 Kh7 46. a4 Rb1+ 47. Kh2 Qd6+ 48. Bg3 Qd1 49. Kh3 Qh1+ 50. Kg4 f5+ 51. Kxf5 Qxg2 52. Rxf8 Qxg3 53. Qa8 Qg6+ 54. Ke5 Re1+ 55. Kd5 Qe6+ 56. Kc5 Re5+ 57. Kd4 Qd6+ 58. Kc3 Qd3+ 59. Kb4 Qb3# 0-1

[Event "NED-chT Cup"]
[Site "Apeldoorn"]
[Date "2022.05.26"]
[Round "2.1"]
[White "De Jong, Jan Willem"]
[Black "Zwirs, Nico"]
[Result "1/2-1/2"]
[ECO "D36"]
[WhiteElo "2432"]
[BlackElo "2468"]
[PlyCount "100"]
[EventDate "2022.05.26"]
[EventType "team-k.o."]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Apeldoorn"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 0-0 9. Qc2 Re8 10. Nge2 Nbd7 11. 0-0 a5 12. a4 Nb8 13. Rad1 Na6 14. Qd2 Nb4 15. Bb1 b6 16. f3 Ba6 17. Bf2 c5 18. Rfe1 Bc4 19. Nc1 Rc8 20. h3 cxd4 21. Qxd4 Bd6 22. Qd2 Qe7 23. N1e2 Nc6 24. Rc1 Bb4 25. Nd4 Nxd4 26. exd4 Qd7 27. Bc2 Bd6 28. Rxe8+ Rxe8 29. Re1 Bc7 30. Rxe8+ Qxe8 31. Qe1 Kf8 32. Qxe8+ Kxe8 33. Nb5 Bxb5 34. axb5 Ke7 35. Kf1 Nh5 36. g4 Nf4 37. h4 Bd6 38. Be3 Ne6 39. Bf5 Bf4 40. Bxe6 Bxe3 41. Bxd5 Bxd4 42. b3 f5 43. h5 Kd6 44. Bc6 Kc5 45. Ke2 fxg4 46. fxg4 Kb4 47. Kd3 Bf6 48. Kc2 Be5 49. Bd7 Bf6 50. Bc6 Be5 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.05.21"]
[Round "5.2"]
[White "De Jong, Jan Willem"]
[Black "Holwijn, Melvin"]
[Result "1-0"]
[ECO "E35"]
[WhiteElo "2438"]
[BlackElo "1962"]
[PlyCount "49"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Charlois Europoort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 exd5 6. Bg5 0-0 7. e3 c6 8. Bd3 h6 9. Bh4 Be7 10. Nge2 Nbd7 11. 0-0 Re8 12. f3 Nf8 13. Rad1 c5 14. Bxf6 Bxf6 15. dxc5 g6 16. Bb5 Re5 17. e4 Qa5 18. f4 Rxe4 19. Nxd5 Re6 20. a4 a6 21. f5 gxf5 22. Qxf5 axb5 23. Nxf6+ Kh8 24. Qf4 Kg7 25. Nh5+ 1-0

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.04.23"]
[Round "9.6"]
[White "De Jong, Jan Willem"]
[Black "Elgersma, Onno"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2438"]
[BlackElo "2263"]
[PlyCount "41"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Bd6 7. Bd3 0-0 8. Nf3 Be6 9. Ne5 c5 10. 0-0 Nc6 11. Nxc6 bxc6 12. dxc5 Bxc5 13. Qa4 Be7 14. Qxc6 Rb8 15. Qa6 Ng4 16. Bxe7 Qxe7 17. Nb5 Qh4 18. Qd6 a6 19. Nd4 Rxb2 20. Nf3 Qh6 21. Rab1 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.03.12"]
[Round "7.1"]
[White "Pruijssers, Roeland"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2570"]
[BlackElo "2438"]
[PlyCount "143"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn Amevo"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 c6 2. Nf3 d5 3. b3 Nf6 4. Bb2 Bf5 5. g3 e6 6. Bg2 h6 7. 0-0 Be7 8. d4 0-0 9. Nc3 Nbd7 10. e3 Re8 11. Qe2 Ne4 12. Rfd1 Nxc3 13. Bxc3 Be4 14. Bh3 Qc7 15. Nd2 Bg6 16. b4 Nb6 17. a4 Nxc4 18. Nxc4 dxc4 19. Qxc4 Qd6 20. Bg2 a6 21. Qe2 Qd7 22. Ra2 f6 23. Rb2 Red8 24. Rc1 Be8 25. Be4 Bd6 26. Bb1 Qe7 27. Qc2 g6 28. f4 a5 29. bxa5 Ba3 30. Ba2 Bxb2 31. Qxb2 Bf7 32. Bb4 Qe8 33. Qc2 Rd7 34. Rf1 Kh7 35. Bb1 Rd5 36. Qb2 Rad8 37. Bc3 R5d7 38. g4 Qe7 39. Bb4 Qe8 40. Bc3 c5 41. dxc5 e5 42. f5 g5 43. Be4 Bc4 44. Re1 Qf7 45. Qb6 Bd5 46. Bc2 Bc6 47. Bb3 Bd5 48. Bc2 Rc8 49. Bb2 Rc6 50. Qb4 Bc4 51. Be4 Bd5 52. Bd3 Rcc7 53. a6 bxa6 54. Bxa6 Qf8 55. Ba3 Qa8 56. Bb5 Bc6 57. Bb2 Rd8 58. e4 Kg7 59. Bc3 Rcd7 60. Qb3 Bxe4 61. Bxd7 Rxd7 62. Qe6 Rf7 63. Bxe5 Bd5 64. Qd6 fxe5 65. Qg6+ Kf8 66. Qxh6+ Kg8 67. Rxe5 Qb8 68. Qg6+ Kh8 69. Qh5+ Kg8 70. Qg6+ Kh8 71. Qh5+ Kg8 72. Qg6+ 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2022.02.05"]
[Round "6.6"]
[White "Bosch, Jeroen"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C97"]
[WhiteElo "2418"]
[BlackElo "2438"]
[PlyCount "76"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Den Bosch HMC"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. a4 Bd7 9. c3 0-0 10. d4 Re8 11. Nbd2 Bf8 12. Nf1 h6 13. Ng3 Na5 14. Bc2 c5 15. h3 Qc7 16. d5 c4 17. axb5 axb5 18. Nh2 Nb7 19. Rb1 Nc5 20. f4 Qb6 21. Kh1 b4 22. cxb4 Qxb4 23. Bd2 Qb6 24. fxe5 dxe5 25. Qf3 Nb3 26. Bxb3 cxb3 27. Nf5 Rac8 28. Bc3 Rc4 29. Nf1 Ra4 30. Nd2 Kh7 31. Rbc1 g6 32. Ne3 Bg7 33. Nec4 Qb8 34. Qf2 Bb5 35. Nb6 Ra6 36. Nbc4 Ra4 37. Nb6 Ra6 38. Nbc4 Ra4 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2021.11.27"]
[Round "4.1"]
[White "Shirov, Alexei"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "C83"]
[WhiteElo "2652"]
[BlackElo "2438"]
[PlyCount "69"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Be3 Be7 10. c3 0-0 11. Nbd2 Qd7 12. Re1 Nxd2 13. Qxd2 Na5 14. Bc2 Nc4 15. Qd3 g6 16. Bc1 c5 17. b3 Bf5 18. Qe2 Na5 19. Bg5 Bxc2 20. Qxc2 Nc6 21. Rad1 Rad8 22. Qc1 Rfe8 23. Qf4 Qf5 24. Qxf5 gxf5 25. h4 Kg7 26. e6 f6 27. Bc1 Bd6 28. h5 Be5 29. Nh4 f4 30. Nf5+ Kg8 31. Nh6+ Kf8 32. Nf7 Rc8 33. Nxe5 Nxe5 34. Bxf4 Rxe6 35. Bxe5 1-0

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2021.11.06"]
[Round "3.8"]
[White "Hilwerda, Jonas"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2287"]
[BlackElo "2438"]
[PlyCount "45"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. Bf4 c5 3. e3 Nc6 4. c3 Nf6 5. Nd2 Bf5 6. Ngf3 Qb6 7. Nh4 Bg4 8. Qb3 e6 9. h3 Bh5 10. g4 Bg6 11. Nxg6 hxg6 12. Bg2 Be7 13. 0-0 0-0 14. dxc5 Bxc5 15. c4 d4 16. exd4 Bxd4 17. Rab1 Rfd8 18. Qxb6 axb6 19. a3 Be5 20. Be3 Bd4 21. Bf4 Be5 22. Be3 Bd4 23. Bf4 1/2-1/2

[Event "NED-chT 2122"]
[Site "Netherlands"]
[Date "2021.09.18"]
[Round "1.9"]
[White "De Jong, Jan Willem"]
[Black "Miesen, Fabian"]
[Result "1/2-1/2"]
[ECO "D46"]
[WhiteElo "2438"]
[BlackElo "2180"]
[PlyCount "56"]
[EventDate "2021.09.18"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Zuid Limburg"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 b5 9. Be2 Bb7 10. 0-0 0-0 11. e4 e5 12. dxe5 Nxe5 13. Nd4 Qc7 14. Nf5 Bc5 15. g3 Rad8 16. Bg5 Bc8 17. Rac1 Qb6 18. Nxb5 Bxf2+ 19. Rxf2 Bxf5 20. exf5 cxb5 21. Qc5 Rd5 22. Qxb6 axb6 23. Bxf6 gxf6 24. Rc3 b4 25. Rb3 Rd4 26. Rf4 Rd2 27. Bf1 Ra8 28. Rf2 Rd4 1/2-1/2

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2020.03.07"]
[Round "6.7"]
[White "Van der Lende, Ilias"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "D17"]
[WhiteElo "2410"]
[BlackElo "2443"]
[PlyCount "72"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]
[WhiteTeam "Kennemer Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. g3 Na6 7. Nh4 Be6 8. Bg5 g6 9. Bxf6 exf6 10. Bg2 Qa5 11. 0-0 0-0-0 12. e4 Nb4 13. Qf3 Qg5 14. Qd1 Bg4 15. Bf3 h5 16. Ng2 Bxf3 17. Qxf3 Rxd4 18. Rfd1 Bc5 19. e5 Qxe5 20. Re1 Qf5 21. Qxf5+ gxf5 22. Re2 Rhd8 23. Ne3 f4 24. Nf5 Rd2 25. Rxd2 Rxd2 26. Ne4 Rd5 27. Nh6 fxg3 28. hxg3 Bd4 29. Rc1 Nd3 30. Rxc4 Nxb2 31. Rc2 Nxa4 32. Nf5 Kc7 33. Rc4 b5 34. Rxc6+ Kxc6 35. Ne7+ Kd7 36. Nxd5 f5 0-1

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2020.02.01"]
[Round "5.1"]
[White "De Jong, Jan Willem"]
[Black "Bosboom, Manuel"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2443"]
[BlackElo "2425"]
[PlyCount "70"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "En Passant"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 Nbd7 7. 0-0 e5 8. Be3 exd4 9. Nxd4 Re8 10. f3 c6 11. Qd2 a5 12. Rfd1 a4 13. Rab1 h5 14. Nc2 Bf8 15. b4 axb3 16. axb3 h4 17. h3 Nh5 18. Bg5 Be7 19. Bxe7 Qxe7 20. f4 Ng3 21. Bf3 Nc5 22. b4 Ne6 23. Re1 Qf6 24. e5 dxe5 25. fxe5 Qg5 26. Qxg5 Nxg5 27. Kf2 Bf5 28. Rb2 Rad8 29. Na1 Rd3 30. Na4 Nxf3 31. gxf3 Nh5 32. Nc5 Nf4 33. Rh1 Rxe5 34. Ra2 Rc3 35. Nab3 b6 0-1

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2019.12.14"]
[Round "4.3"]
[White "Pruijssers, Roeland"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2550"]
[BlackElo "2443"]
[PlyCount "75"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn MuConsult"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c3 g6 7. 0-0 Bg7 8. h3 0-0 9. Be3 b5 10. Bc2 Re8 11. Nbd2 a5 12. d4 exd4 13. cxd4 Nb4 14. Bb1 c5 15. dxc5 dxc5 16. Bxc5 Bb7 17. Re1 Nd7 18. Bd4 Bxd4 19. Nxd4 Ne5 20. Nxb5 Qg5 21. Rf1 Qf4 22. Nb3 Ba6 23. a4 Bxb5 24. axb5 a4 25. Qc1 Qxc1 26. Nxc1 Nc4 27. Na2 Nxa2 28. Bxa2 Rxe4 29. Rac1 Nb6 30. Rc7 Rb4 31. Bxf7+ Kh8 32. Re1 Rxb2 33. Ree7 Rxb5 34. Ba2 Rh5 35. g4 Rxh3 36. Rb7 Rf8 37. Rxb6 Rhf3 38. Rbb7 1-0

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2019.11.23"]
[Round "3.8"]
[White "De Groote, Ewoud"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "D82"]
[WhiteElo "2227"]
[BlackElo "2443"]
[PlyCount "45"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c5 6. dxc5 Qa5 7. Rc1 Ne4 8. cxd5 Nxc3 9. Qd2 Qxa2 10. Rxc3 Qa1+ 11. Rc1 Qxb2 12. Qxb2 Bxb2 13. Rc2 Ba3 14. Bb5+ Kf8 15. e4 f5 16. Nf3 h6 17. 0-0 a6 18. Ba4 fxe4 19. Ne5 Kg7 20. Nc4 Bxc5 21. Be5+ Kh7 22. Bxh8 b5 23. Ne5 1-0

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.16"]
[Round "7.8"]
[White "Yuffa, Daniil"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2578"]
[BlackElo "2446"]
[PlyCount "73"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Molodezka"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "RUS"]
[BlackTeamCountry "NED"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 g6 4. 0-0 Bg7 5. d3 0-0 6. Nbd2 c5 7. e4 Nc6 8. Re1 Qc7 9. c3 Rd8 10. Qb3 b6 11. h3 dxe4 12. dxe4 h6 13. Qa4 Bd7 14. Qc2 e5 15. Nc4 Be6 16. Ne3 c4 17. g4 Rac8 18. g5 Nh5 19. Nd5 Bxd5 20. exd5 Ne7 21. gxh6 Bf6 22. Ng5 Nxd5 23. Ne6 Qe7 24. Nxd8 Rxd8 25. Bxd5 Rxd5 26. Qe4 Qd8 27. Qxc4 Bg5 28. Bxg5 Qxg5+ 29. Qg4 Qd8 30. Rad1 Nf4 31. Qf3 Rxd1 32. Rxd1 Qg5+ 33. Kh2 Kh7 34. Rd7 Kxh6 35. Rxf7 Nh5 36. Qg4 Qc1 37. h4 1-0

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.15"]
[Round "6.14"]
[White "Vucinic, Gojko"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C58"]
[WhiteElo "2384"]
[BlackElo "2446"]
[PlyCount "48"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Itaka"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "SRB"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Bd3 Nd5 9. Nf3 Bd6 10. 0-0 0-0 11. Re1 f5 12. Nxe5 Qf6 13. Nf3 g5 14. c3 g4 15. b4 gxf3 16. bxa5 Bxh2+ 17. Kxh2 Qh4+ 18. Kg1 fxg2 19. f4 Nxf4 20. Bc4+ Kh8 21. d4 Nh3+ 22. Kxg2 f4 23. Rf1 f3+ 24. Rxf3 Qg4+ 0-1

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.14"]
[Round "5.15"]
[White "Zymberi, Astrit"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "E46"]
[WhiteElo "2148"]
[BlackElo "2446"]
[PlyCount "64"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Drejtesia"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "KOS"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 Re8 6. a3 Bf8 7. d5 a5 8. Ng3 Na6 9. Be2 Nc5 10. b3 a4 11. bxa4 d6 12. 0-0 g6 13. Rb1 Bg7 14. dxe6 Bxe6 15. e4 Bd7 16. f3 Nxa4 17. Nxa4 Bxa4 18. Qd2 b6 19. Bb2 Bc6 20. Bd3 Nd7 21. Bxg7 Kxg7 22. f4 Qf6 23. e5 dxe5 24. f5 Qh4 25. fxg6 hxg6 26. c5 Rh8 27. Be4 Rxa3 28. Rf3 Rxf3 29. gxf3 Bxe4 30. Nxe4 Nxc5 31. Nxc5 bxc5 32. Rd1 Qd4+ 0-1

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.13"]
[Round "4.12"]
[White "De Jong, Jan Willem"]
[Black "Mohr, Georg"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2446"]
[BlackElo "2437"]
[PlyCount "131"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Maribor"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "SLO"]

1. d4 d6 2. e4 Nf6 3. Nc3 e5 4. Nf3 exd4 5. Nxd4 Be7 6. Bf4 Nc6 7. Be2 0-0 8. 0-0 Re8 9. Qd2 Bf8 10. Rad1 Bd7 11. f3 g6 12. Be3 Bg7 13. Rfe1 a6 14. Bf1 Nxd4 15. Bxd4 Be6 16. Qf2 Qe7 17. e5 Nh5 18. exd6 cxd6 19. Nd5 Qd8 20. Bb6 Qd7 21. Nc7 Bxb2 22. Nxa8 Rxa8 23. Bc5 Qa4 24. Bxd6 Bc3 25. Rxe6 fxe6 26. Qe3 Bg7 27. Qxe6+ Kh8 28. Qc4 Qd7 29. Qc7 Qe6 30. Qe7 Qxa2 31. Be5 Qa5 32. Bxg7+ Nxg7 33. Rd7 Qb6+ 34. Kh1 Rg8 35. h3 Qb1 36. Kg1 b5 37. Rc7 Qb2 38. c3 Qc1 39. Qe5 Qd2 40. Ra7 Qa2 41. Qxb5 Qxg2+ 42. Kxg2 axb5 43. Bxb5 Nf5 44. Bd3 Ne3+ 45. Kg3 Rc8 46. Kf4 Nd5+ 47. Ke5 Nxc3 48. Be4 Rf8 49. h4 Ne2 50. h5 Nf4 51. h6 Nh3 52. Bd5 Ng5 53. f4 Nh3 54. Bf7 Nf2 55. Kf6 Ng4+ 56. Kg5 Ne3 57. Ra5 Nf5 58. Be6 Nd6 59. Re5 Ne8 60. Bf7 Nd6 61. Be6 Ne8 62. Bd7 Nf6 63. Bh3 Ne8 64. Re6 Kg8 65. Rc6 Kh8 66. Rc8 1-0

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.12"]
[Round "3.12"]
[White "Van Twillert, Laurents"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2141"]
[BlackElo "2446"]
[PlyCount "44"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 Bb6 8. 0-0 0-0 9. f4 d5 10. exd5 Nxd4 11. Bxd4 Nf5 12. Bf2 Bxf2+ 13. Rxf2 Ne3 14. Qe2 Re8 15. Na3 Bd7 16. Qd2 Rad8 17. Rf3 Qb6 18. Kh1 Bc6 19. Re1 Nxd5 20. Rxe8+ Rxe8 21. Bxd5 Qxb2 22. Qxb2 Re1+ 0-1

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.11"]
[Round "2.5"]
[White "De Jong, Jan Willem"]
[Black "Bartel, Mateusz"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2446"]
[BlackElo "2636"]
[PlyCount "70"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Novy Bor"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "CZE"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. h3 g6 7. Nf3 Bf5 8. Be2 Bg7 9. 0-0 Nf6 10. Re1 0-0 11. Nbd2 Nb4 12. Nf1 Nc2 13. Ng3 Nxe1 14. Qxe1 Bd7 15. Bd3 Bc6 16. Bg5 Rae8 17. Qe3 e5 18. Bxf6 Bxf6 19. dxe5 Bxe5 20. Nxe5 Rxe5 21. Qxa7 d4 22. c4 h5 23. Qxd4 Rd8 24. Qc3 h4 25. Nf1 Bxg2 26. Kxg2 Qc6+ 27. f3 Qc5 28. f4 Re6 29. Rd1 Qc6+ 30. Kf2 Qc7 31. Kf3 Qc6+ 32. Kf2 Qc5+ 33. Kg2 Rd4 34. Bc2 Re2+ 35. Kf3 Qh5# 0-1

[Event "EU-Cup 35th"]
[Site "Ulcinj"]
[Date "2019.11.10"]
[Round "1.19"]
[White "De Jong, Jan Willem"]
[Black "Pobor, Milo"]
[Result "1-0"]
[ECO "B47"]
[WhiteElo "2446"]
[BlackElo "2064"]
[PlyCount "67"]
[EventDate "2019.11.10"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MNE"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Crnogorac"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "MNE"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 h5 8. 0-0 h4 9. Re1 hxg3 10. hxg3 d6 11. Nxc6 bxc6 12. e5 d5 13. Na4 Bd7 14. c4 Nh6 15. Bf4 Rb8 16. a3 Nf5 17. Rc1 Qa7 18. c5 Rb5 19. b4 a5 20. Bd2 Be7 21. Bf1 Rb8 22. bxa5 f6 23. Bd3 Nd4 24. Nb6 fxe5 25. Rxe5 Rf8 26. Kg2 Nf3 27. Re3 Nxd2 28. Qxd2 Bg5 29. f4 Bf6 30. Bg6+ Kd8 31. Rce1 e5 32. fxe5 Bg5 33. e6 Bxe6 34. Rxe6 1-0

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2019.11.02"]
[Round "2.2"]
[White "De Jong, Jan Willem"]
[Black "Halfhide, Sebastian"]
[Result "1/2-1/2"]
[ECO "E20"]
[WhiteElo "2443"]
[BlackElo "2225"]
[PlyCount "96"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Charlois Europoort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. d5 b5 6. e4 0-0 7. Bd2 bxc4 8. Bxc4 exd5 9. Bxd5 Nxd5 10. Nxd5 Bxd2+ 11. Qxd2 Nc6 12. Ne2 Ba6 13. 0-0 f5 14. Rfd1 fxe4 15. fxe4 Bxe2 16. Qxe2 Kh8 17. Qe3 d6 18. Rf1 Qd7 19. h3 Rae8 20. Rad1 Qd8 21. a3 a5 22. Rxf8+ Rxf8 23. Nc3 Nd4 24. Ne2 Nxe2+ 25. Qxe2 Qe7 26. Qa6 Qxe4 27. Qxd6 Qe3+ 28. Kh2 Kg8 29. Qd5+ Kh8 30. Qd6 Kg8 31. Rd5 Rc8 32. Rf5 h6 33. Qd7 Rb8 34. Qd5+ Kh8 35. Qxc5 Qxc5 36. Rxc5 Rxb2 37. Rxa5 Rb3 38. Kg1 Rb2 39. Rf5 Ra2 40. Rf3 Kh7 41. h4 h5 42. Kf1 g5 43. g3 Kg6 44. Ke1 Rh2 45. hxg5 Kxg5 46. a4 Ra2 47. Rf4 Rg2 48. Rf3 Ra2 1/2-1/2

[Event "NED-chT 1920"]
[Site "Netherlands"]
[Date "2019.09.28"]
[Round "1.8"]
[White "Paulet, Iozefina"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "2294"]
[BlackElo "2443"]
[PlyCount "152"]
[EventDate "2019.09.28"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 0-0 6. Re1 h6 7. c3 d6 8. h3 a6 9. b4 Ba7 10. Bb3 Nh5 11. Nbd2 Qf6 12. Nf1 Be6 13. Be3 Nf4 14. Bxf4 Qxf4 15. Ne3 Ne7 16. Bc2 Qf6 17. d4 Rad8 18. Kh2 g6 19. Qd2 Qf4+ 20. Kg1 Bxh3 21. Nf5 Bxf5 22. Qxf4 exf4 23. exf5 Rfe8 24. fxg6 Nxg6 25. Rxe8+ Rxe8 26. Re1 Kf8 27. Rxe8+ Kxe8 28. Be4 c6 29. Ne1 d5 30. Bf5 Ne7 31. Bg4 Bb8 32. Nd3 b6 33. Kf1 Ng8 34. Bc8 a5 35. bxa5 bxa5 36. Nc5 Ne7 37. Bd7+ Kd8 38. Bg4 Bc7 39. Bh5 Ke8 40. Bd1 Bd6 41. Nb7 Bc7 42. Nc5 Bb6 43. Nd3 Ng6 44. Bh5 Bc7 45. Nc5 Ke7 46. Bg4 Kd6 47. f3 Bb6 48. Na4 Ba7 49. Ke2 c5 50. Kd3 c4+ 51. Kc2 Nh4 52. Bh3 f5 53. Nb2 Ke6 54. Na4 h5 55. Kb2 Kd6 56. Kc2 Kc6 57. Nb2 Bb8 58. Kd2 Kb5 59. a4+ Kc6 60. Ke2 Kd7 61. Nd1 Ke6 62. Nf2 Kf6 63. Nh1 Ng6 64. Kf2 Kg5 65. Ke2 Bd6 66. Ke1 Nf8 67. Kf2 Nd7 68. g3 fxg3+ 69. Nxg3 Bxg3+ 70. Kxg3 h4+ 71. Kf2 Kf4 72. Ke2 Nb6 73. Kd2 Nxa4 74. Kc2 Nb6 75. Kb2 Kg3 76. Bxf5 h3 0-1

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2019.05.11"]
[Round "9.7"]
[White "De Jong, Jan Willem"]
[Black "Bosch, Jeroen"]
[Result "1/2-1/2"]
[ECO "A90"]
[WhiteElo "2446"]
[BlackElo "2412"]
[PlyCount "135"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 e6 2. c4 f5 3. g3 Nf6 4. Bg2 Bb4+ 5. Bd2 Be7 6. Nc3 0-0 7. Nf3 d6 8. 0-0 Qe8 9. Qc2 Qh5 10. Rad1 Nc6 11. d5 Nb4 12. Qb3 Na6 13. dxe6 Nc5 14. Qc2 Bxe6 15. Nd4 Bd7 16. b4 Nce4 17. Nd5 Nxd5 18. cxd5 Nxd2 19. Rxd2 Rac8 20. e3 Rf6 21. Qd1 Qe8 22. Qe2 a6 23. Rc1 Kh8 24. h4 Bd8 25. Qf3 Rb8 26. Rdc2 Qf8 27. Bf1 Qf7 28. Rc3 g6 29. b5 axb5 30. Bxb5 Bc8 31. Bc4 Qg7 32. Bd3 Bd7 33. Bb5 Bc8 34. a4 Rf7 35. Rc4 Re7 36. R4c2 Ra8 37. Kg2 Qe5 38. Ne2 Qe4 39. Rc4 Qxf3+ 40. Kxf3 Kg7 41. Nc3 Kf6 42. Ke2 Ra5 43. Kd3 Ra8 44. f4 h6 45. Ne2 Ra5 46. Nd4 Ra8 47. Ra1 Rh7 48. Rh1 Re7 49. Rc2 Rg7 50. Ra2 Re7 51. Rha1 Rh7 52. a5 g5 53. h5 Rh8 54. a6 bxa6 55. Bxa6 Bd7 56. Bc4 Rb8 57. Kc3 Kg7 58. Ra7 Re8 59. Re1 Kf6 60. Bd3 gxf4 61. gxf4 Rg8 62. Rb1 Rxb1 63. Bxb1 Rg3 64. Kd2 Rh3 65. Ra8 Be7 66. Ra7 Bd8 67. Ra8 Be7 68. Ra7 1/2-1/2

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2019.04.13"]
[Round "8.3"]
[White "Van Osch, Mees"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C49"]
[WhiteElo "2310"]
[BlackElo "2446"]
[PlyCount "69"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "De Stukkenjagers"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. Nd5 Nxd5 6. exd5 Nd4 7. Nxd4 exd4 8. 0-0 0-0 9. Qg4 Qf6 10. a3 Ba5 11. b4 Bb6 12. d3 d6 13. Qg3 a6 14. Ba4 Qg6 15. Qxg6 hxg6 16. Re1 a5 17. Bb2 axb4 18. axb4 g5 19. f3 Rd8 20. g4 Kf8 21. Bb5 Rxa1 22. Rxa1 f6 23. Ra8 Ke7 24. Kf2 g6 25. Bc1 Rh8 26. Kg3 Kd8 27. h3 Ke7 28. f4 gxf4+ 29. Bxf4 g5 30. Bd2 Rg8 31. Ra1 f5 32. gxf5 Bxf5 33. Rf1 Bc8 34. Re1+ Kf6 35. Re8 1/2-1/2

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2019.03.16"]
[Round "7.8"]
[White "Willemze, Thomas"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "2408"]
[BlackElo "2446"]
[PlyCount "68"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 0-0 6. Bb3 a6 7. h3 d6 8. Bg5 Ne7 9. Bxf6 gxf6 10. Nh4 Ng6 11. Nxg6 hxg6 12. Nd2 c6 13. Qf3 Kg7 14. g4 b5 15. Nf1 a5 16. Ng3 a4 17. Bc2 b4 18. cxb4 Bxb4+ 19. Kf1 Rh8 20. Kg2 Rh4 21. Rad1 Bc5 22. Ne2 Qh8 23. Qg3 Qh6 24. f4 exf4 25. Nxf4 Bd4 26. Nh5+ Rxh5 27. gxh5 Qxh5 28. Rd2 Be5 29. Bd1 Qh6 30. Qf2 Qg5+ 31. Kf1 Bd4 32. h4 Qh6 33. Qh2 Bh3+ 34. Rg2 Qd2 0-1

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2019.02.09"]
[Round "6.10"]
[White "De Jong, Jan Willem"]
[Black "De Waele, Warre"]
[Result "1/2-1/2"]
[ECO "E38"]
[WhiteElo "2446"]
[BlackElo "2242"]
[PlyCount "57"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Qc7 6. a3 Bxc5 7. b4 Be7 8. Nb5 Qc6 9. Nf3 d6 10. g3 a6 11. Nbd4 Qc7 12. Bg2 e5 13. Nb3 Be6 14. Nfd2 d5 15. Bb2 0-0 16. Rc1 d4 17. 0-0 Nc6 18. b5 Nb8 19. a4 Nbd7 20. a5 Nc5 21. b6 Qd7 22. Nxc5 Bxc5 23. Ne4 Be7 24. e3 Rfc8 25. Nxf6+ Bxf6 26. Qe4 Rc6 27. exd4 exd4 28. Rfd1 Rd8 29. c5 1/2-1/2

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2018.11.24"]
[Round "4.7"]
[White "Rijnaarts, Sjef"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C83"]
[WhiteElo "2360"]
[BlackElo "2446"]
[PlyCount "46"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn MuConsult"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 Be7 11. Bc2 d4 12. Nb3 d3 13. Bb1 Nxb3 14. axb3 Bf5 15. Be3 0-0 16. Bd4 Qd5 17. Re1 d2 18. Qxd2 Bxb1 19. Raxb1 Qxb3 20. Be3 Rfd8 21. Qe2 Qd5 22. Bf4 Qe6 23. Qe4 a5 1/2-1/2

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2018.11.03"]
[Round "3.8"]
[White "Cuijpers, Frans Andre"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C80"]
[WhiteElo "2433"]
[BlackElo "2446"]
[PlyCount "74"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Be3 Be7 10. c3 Nc5 11. Re1 Nxb3 12. axb3 Bg4 13. Bf4 0-0 14. Qd3 Qd7 15. Nbd2 Nd8 16. Bg5 Bf5 17. Qe3 c5 18. Bxe7 Qxe7 19. c4 d4 20. Qf4 Bg6 21. Ne4 Ne6 22. Qc1 Bxe4 23. Rxe4 Rfd8 24. h3 Qb7 25. Nd2 d3 26. Kh2 Rd7 27. cxb5 axb5 28. Rxa8+ Qxa8 29. f4 Qd5 30. Qf1 Rd8 31. h4 h5 32. Qf3 g6 33. g4 Nd4 34. Qxd3 hxg4 35. Kh1 Nf5 36. Qxd5 Rxd5 37. Nf1 Rd1 0-1

[Event "NED-chT 1819"]
[Site "Netherlands"]
[Date "2018.10.06"]
[Round "2.8"]
[White "De Jong, Jan Willem"]
[Black "Ducarmon, Quinten"]
[Result "0-1"]
[ECO "D12"]
[WhiteElo "2446"]
[BlackElo "2483"]
[PlyCount "84"]
[EventDate "2018.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 Bf5 5. Nf3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. Bd2 Be7 10. 0-0-0 a6 11. cxd5 cxd5 12. Nxg6 hxg6 13. Kb1 Nc6 14. Rc1 0-0 15. Qd1 e5 16. g4 Rad8 17. h4 Rfe8 18. h5 g5 19. Bd3 Bb4 20. dxe5 Qxe5 21. a3 d4 22. f4 Qd6 23. exd4 Qxd4 24. Rh3 gxf4 25. g5 Ne5 26. Ne2 Qd7 27. Nxf4 Bxd2 28. Qxd2 Nd5 29. Nxd5 Qxh3 30. Be4 Nf3 31. Bxf3 Qxf3 32. Rd1 Qxh5 33. Ka2 Qg4 34. g6 Qe6 35. gxf7+ Qxf7 36. Qg5 Rd6 37. Ka1 Rg6 38. Qh5 Rh6 39. Qg5 Kh8 40. Nf4 Rf8 41. Ne2 Qh5 42. Qg2 Qf3 0-1

[Event "NED-chT Cup"]
[Site "Apeldoorn"]
[Date "2018.05.10"]
[Round "1.1"]
[White "De Jong, Jan Willem"]
[Black "Hausrath, Daniel"]
[Result "1/2-1/2"]
[ECO "E91"]
[WhiteElo "2446"]
[BlackElo "2494"]
[PlyCount "43"]
[EventDate "2018.05.10"]
[EventType "team-k.o."]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG II"]
[BlackTeam "Voerendaal"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 c5 7. d5 e6 8. 0-0 Re8 9. dxe6 Bxe6 10. Bf4 Bg4 11. Qxd6 Qxd6 12. Bxd6 Nxe4 13. Nxe4 Rxe4 14. Bd3 Bxf3 15. gxf3 Rd4 16. Be4 Nd7 17. Bxb7 Re8 18. Rad1 Re6 19. Bc7 Re2 20. b4 Rxa2 21. Bc6 Ne5 22. Bxe5 1/2-1/2

[Event "NED-chT Cup"]
[Site "Apeldoorn"]
[Date "2018.05.10"]
[Round "2.2"]
[White "Van Akkeren, Arno"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2074"]
[BlackElo "2446"]
[PlyCount "50"]
[EventDate "2018.05.10"]
[EventType "team-k.o."]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]
[WhiteTeam "Lonneker"]
[BlackTeam "Leiden LSG II"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Nc3 Nxe4 5. Nxe4 d5 6. Bd3 dxe4 7. Bxe4 Qf6 8. 0-0 Bf5 9. Bxc6+ Qxc6 10. Nxe5 Qxc2 11. Qe2 Be7 12. Qb5+ Kf8 13. Qd5 Be6 14. Qxb7 Rd8 15. d4 Bd5 16. Qxa7 Ra8 17. Qxa8+ Bxa8 18. Re1 f6 19. Ng4 Kf7 20. Ne3 Qe4 21. h3 Rd8 22. Bd2 Rxd4 23. Bc3 Rd3 24. Kf1 Bc5 25. f3 Qh4 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.04.21"]
[Round "9.6"]
[White "De Jong, Jan Willem"]
[Black "Ducarmon, Quinten"]
[Result "0-1"]
[ECO "A09"]
[WhiteElo "2446"]
[BlackElo "2473"]
[PlyCount "60"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Kennemer Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 d5 2. c4 d4 3. b4 Bg4 4. Qb3 Nf6 5. Ne5 Bf5 6. e3 dxe3 7. fxe3 Nbd7 8. Nxd7 Qxd7 9. Bb2 g6 10. Bxf6 exf6 11. Nc3 c6 12. Be2 Bg7 13. Rd1 Bd3 14. Bxd3 Qxd3 15. Na4 Qf5 16. Nc3 0-0 17. Qb1 Qg4 18. Qe4 Qd7 19. 0-0 f5 20. Qc2 Rad8 21. Nb1 Rfe8 22. Rfe1 Bh6 23. Nc3 Qe6 24. c5 Qc4 25. Qb3 Qh4 26. g3 Qg4 27. Rf1 Rd3 28. a3 Red8 29. Qc2 Qc4 30. Rf3 Qxc3 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.04.07"]
[Round "8.6"]
[White "Kuipers, Stefan"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2403"]
[BlackElo "2446"]
[PlyCount "41"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. Bg5 h6 7. Bh4 Bb6 8. Nbd2 Be6 9. 0-0 g5 10. Bg3 0-0 11. a4 a5 12. Bb3 Qd7 13. Nc4 Ba7 14. Ne3 Bxe3 15. fxe3 Bxb3 16. Qxb3 Kg7 17. Qd1 Qg4 18. Be1 Nd7 19. b4 b6 20. Qc2 Qe6 21. Bd2 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.03.10"]
[Round "7.9"]
[White "Ikonnikov, Vyacheslav"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "D91"]
[WhiteElo "2526"]
[BlackElo "2446"]
[PlyCount "125"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Qd2 h6 9. Nf3 exd5 10. e3 0-0 11. Bd3 Re8 12. 0-0 a5 13. a3 c6 14. h3 Nd7 15. Rac1 a4 16. Rc2 Nb6 17. Ne2 Bd7 18. Qb4 Bf8 19. Qc3 Bd6 20. Ne5 Rc8 21. f4 c5 22. Rcc1 cxd4 23. Qxd4 Bxe5 24. fxe5 Nc4 25. Nf4 Be6 26. Nxe6 Rxe6 27. Bxc4 dxc4 28. Rxc4 Qe8 29. Rxc8 Qxc8 30. Qxa4 Rxe5 31. Qd4 Qe8 32. Rf3 Qe6 33. Qd8+ Kg7 34. Kf2 Rd5 35. Qc7 Rd2+ 36. Kg1 Rd1+ 37. Kh2 b6 38. Qc3+ Kg8 39. Rf6 Qd5 40. Rxb6 Kh7 41. Rf6 Qb7 42. Qc4 Kg7 43. Rf2 g5 44. Qc3+ Kg8 45. Qe5 Rd5 46. Qe8+ Kg7 47. Rc2 Qb6 48. Qe7 Rf5 49. b4 Qa6 50. Qd8 Qe6 51. Qd4+ Kg8 52. Rc5 Rf2 53. b5 Kh7 54. Rd5 g4 55. hxg4 Qe7 56. Kg3 Rf6 57. Rd7 Qe6 58. Rd8 Kg6 59. a4 h5 60. gxh5+ Kh6 61. a5 Kh7 62. a6 Qa2 63. Rh8+ 1-0

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.02.03"]
[Round "6.3"]
[White "De Jong, Jan Willem"]
[Black "Brandenburg, Daan"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2446"]
[BlackElo "2489"]
[PlyCount "31"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Groningen Combinatie"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Nge2 Nh5 9. Bxe7 Qxe7 10. Qd2 Nb6 11. 0-0 0-0 12. Rae1 g6 13. f3 Be6 14. Nc1 Rad8 15. Qf2 Ng7 16. Nb3 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.11.25"]
[Round "4.4"]
[White "Van der Poel, Henk"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2233"]
[BlackElo "2446"]
[PlyCount "42"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Nb6 9. Nc3 Qe6 10. Qe4 g6 11. f4 Bg7 12. c5 Nd5 13. Bc4 Bb7 14. Be3 0-0 15. 0-0 d6 16. cxd6 cxd6 17. Bxd5 cxd5 18. Qb4 Bc6 19. Rae1 Rfb8 20. Qa3 dxe5 21. fxe5 d4 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.11.04"]
[Round "3.7"]
[White "Dijkhuis, Tycho"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C81"]
[WhiteElo "2405"]
[BlackElo "2446"]
[PlyCount "50"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 0-0 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Na5 16. Nbd2 Qa7 17. Rac1 Qxe3 18. fxe3 c5 19. Nxe4 Nxb3 20. axb3 dxe4 21. Nd2 Rab8 22. Nxe4 Rxb3 23. Nxc5 Rxe3 24. Nxa6 Rxe5 25. Nc5 h5 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.09.23"]
[Round "2.4"]
[White "De Jong, Jan Willem"]
[Black "Tereick, Benjamin"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2446"]
[BlackElo "2393"]
[PlyCount "29"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Voerendaal"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 e6 2. c4 Bb4+ 3. Bd2 Bxd2+ 4. Qxd2 Nf6 5. Nc3 d5 6. Nf3 0-0 7. e3 Qe7 8. Rc1 Rd8 9. Qc2 a6 10. cxd5 exd5 11. Bd3 Nc6 12. 0-0 Nb4 13. Qb1 Nxd3 14. Qxd3 c6 15. a3 1/2-1/2

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2017.09.16"]
[Round "1.3"]
[White "De Jong, Jan Willem"]
[Black "Zaragatski, Ilja"]
[Result "1-0"]
[ECO "A57"]
[WhiteElo "2446"]
[BlackElo "2497"]
[PlyCount "67"]
[EventDate "2017.09.16"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "SISSA"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 bxc4 5. e4 e6 6. Bxc4 exd5 7. exd5 Be7 8. Nc3 0-0 9. Nge2 d6 10. 0-0 Nbd7 11. h3 Nb6 12. b3 Nxc4 13. bxc4 Nd7 14. Bf4 Nb6 15. Qd3 Qd7 16. Nb5 a6 17. Nbc3 Qf5 18. Ne4 a5 19. Rfd1 Ba6 20. Rac1 Rfe8 21. g4 Qd7 22. N2g3 Qa4 23. Bxd6 Bxc4 24. Qc3 Qb4 25. Qa1 Nxd5 26. Bxe7 Rxe7 27. Nf5 f6 28. Ned6 Re2 29. Rxc4 Qa3 30. Rxd5 Qf3 31. Qf1 Rb8 32. Rdxc5 Rb1 33. Rc8+ Re8 34. Rxe8# 1-0

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.05.06"]
[Round "9.7"]
[White "De Jong, Jan Willem"]
[Black "Vandenbussche, Thibaut"]
[Result "1/2-1/2"]
[ECO "E70"]
[WhiteElo "2454"]
[BlackElo "2401"]
[PlyCount "82"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Charlois Europoort"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 0-0 6. h3 e6 7. Nf3 exd5 8. exd5 Re8+ 9. Be3 Bh6 10. Bd3 Bxe3 11. fxe3 Rxe3+ 12. Kf2 Re8 13. Qd2 d6 14. Rae1 Nbd7 15. Qf4 Qb6 16. b3 Qa5 17. Rxe8+ Nxe8 18. Re1 Ndf6 19. Ng5 Bf5 20. Qd2 h6 21. Bxf5 hxg5 22. Bb1 Ng7 23. g4 Re8 24. Rxe8+ Ngxe8 25. Qe3 a6 26. Ne2 Qd8 27. Nc3 Nh7 28. Ke2 Nc7 29. Bd3 Qf6 30. Ne4 Qe5 31. Qg3 Qxg3 32. Nxg3 Nf6 33. a4 b6 34. Ke3 Kf8 35. Ne2 Ke7 36. Ng1 Nd7 37. Nf3 Kf6 38. Nd2 Ke5 39. Nf3+ Kf6 40. Nd2 Ke5 41. Nf3+ Kf6 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.04.01"]
[Round "8.9"]
[White "De Jong, Jan Willem"]
[Black "Drent, Sjoerd"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2454"]
[BlackElo "1984"]
[PlyCount "40"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "En Passant"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 0-0 6. 0-0 d6 7. a4 a6 8. h3 Be6 9. Bxe6 fxe6 10. Re1 Qe7 11. b4 Ba7 12. Nbd2 Nh5 13. Nf1 Nf4 14. Be3 Qf6 15. Kh2 h6 16. Ra2 Kh7 17. b5 axb5 18. axb5 Bxe3 19. Rxa8 Rxa8 20. fxe3 Nb8 1-0

[Event "BEL-NED email"]
[Site "ICCF email"]
[Date "2017.03.20"]
[Round "?.1"]
[White "Van Leeuwen, Etienne"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "2491"]
[PlyCount "42"]
[EventDate "2017.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Belgium"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "BEL"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bc5 8. Be3 0-0 9. Nxc6 bxc6 10. Bxc5 Nxc5 11. Bxc6 Rb8 12. Qxd5 Qe7 13. 0-0 Rxb2 14. Nc3 Rd8 15. Qf3 Ne6 16. Rfd1 Nd4 17. Qe4 Nxc6 18. Qxc6 Bb7 19. Qc4 Rf8 20. Rab1 Rxb1 21. Rxb1 Qxe5 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.03.11"]
[Round "7.5"]
[White "Kerkvliet, Maximiliaan"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D92"]
[WhiteElo "2202"]
[BlackElo "2454"]
[PlyCount "86"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Kennemer Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bf4 0-0 6. Rc1 dxc4 7. e3 Be6 8. Ng5 Bg4 9. f3 Bc8 10. Bxc4 h6 11. Nge4 Ne8 12. 0-0 Nc6 13. Qe2 Nd6 14. Bd3 Nf5 15. d5 Ne5 16. Bb1 c6 17. dxc6 bxc6 18. Nc5 g5 19. Bg3 Nxg3 20. hxg3 Qa5 21. N3a4 Rd8 22. Rfd1 Rd6 23. b3 Rb8 24. Qc2 Ng6 25. Ne4 Rxd1+ 26. Rxd1 Qc7 27. g4 Be5 28. Qd3 Kg7 29. Nac5 Nf8 30. Kf2 Rb5 31. Rc1 e6 32. Na4 Rd5 33. Qc2 f5 34. gxf5 exf5 35. Nec3 Rd8 36. Ne2 Rd6 37. Qc5 Nd7 38. Qc2 Nf6 39. Nac3 Qf7 40. Rh1 Qd7 41. Rd1 Rxd1 42. Nxd1 Nd5 43. Nb2 Ba6 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "Betker, Joerg"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C68"]
[WhiteElo "2434"]
[PlyCount "47"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Switzerland"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 h5 7. d3 Qf6 8. Nbd2 Ne7 9. Re1 Ng6 10. d4 Nf4 11. hxg4 hxg4 12. g3 gxf3 13. Qxf3 Ne6 14. dxe5 Qxe5 15. Qf5 Qb5 16. a4 Qb6 17. c3 g6 18. Qf3 0-0-0 19. Kg2 Rh7 20. Nc4 Qb3 21. Na5 Qb6 22. Nc4 Qb3 23. Na5 Qb6 24. Nc4 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "De Jong, Jan Willem"]
[Black "Biedermann, Thomas"]
[Result "1/2-1/2"]
[ECO "E36"]
[BlackElo "2433"]
[PlyCount "39"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "US of America"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "USA"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. a3 Bxc3+ 6. Qxc3 d5 7. Nf3 dxc4 8. Qxc4 b6 9. Bg5 Ba6 10. Qa4 Qd7 11. Qc2 c5 12. dxc5 Rc8 13. Bxf6 gxf6 14. Rd1 Qe7 15. e4 Bb7 16. Qd2 Qxc5 17. Bd3 Nd7 18. 0-0 Ne5 19. Nxe5 Qxe5 20. f4 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "De Jong, Jan Willem"]
[Black "Keuter, Klaus"]
[Result "1/2-1/2"]
[ECO "E32"]
[BlackElo "2443"]
[PlyCount "52"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Germany"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. a3 Bxc3+ 6. Qxc3 b6 7. Bg5 Bb7 8. f3 h6 9. Bh4 d5 10. e3 Nbd7 11. cxd5 Nxd5 12. Bxd8 Nxc3 13. Bh4 Nd5 14. Bf2 c5 15. e4 Ne7 16. Ne2 f5 17. exf5 Nxf5 18. dxc5 Nxc5 19. Nc3 Rad8 20. Rd1 Rxd1+ 21. Kxd1 Nb3 22. Bc4 Rd8+ 23. Ke2 Nbd4+ 24. Bxd4 Nxd4+ 25. Kf2 Kf7 26. Rd1 Kf6 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "De Jong, Jan Willem"]
[Black "Saglione, Eduardo"]
[Result "1/2-1/2"]
[ECO "D75"]
[BlackElo "2439"]
[PlyCount "41"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "CADAP-II"]
[WhiteTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. g3 d5 6. cxd5 Nxd5 7. Bg2 c5 8. 0-0 Nxc3 9. bxc3 Nc6 10. Be3 cxd4 11. Nxd4 Na5 12. Rb1 Nc4 13. Qd3 Nxe3 14. Qxe3 Bf6 15. Bxb7 Bxb7 16. Rxb7 Qd5 17. Rb2 Rfc8 18. Rc1 Bxd4 19. cxd4 Rxc1+ 20. Qxc1 Qxd4 21. Rd2 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "Delgado Ramos, Hector"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D87"]
[PlyCount "43"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Cuba"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "CUB"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 0-0 10. 0-0 b6 11. dxc5 Qc7 12. Nd4 Ne5 13. Nb5 Qb8 14. Be2 bxc5 15. Rb1 a6 16. Nd4 Qc7 17. Nb3 Rd8 18. Qc2 c4 19. Nc5 Nd3 20. Nxd3 cxd3 21. Bxd3 Qxc3 22. Qxc3 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "Malashenkov, Alexei"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C83"]
[WhiteElo "2432"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Belarus"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "BLR"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 Be7 11. Bc2 d4 12. Nb3 d3 13. Bb1 Nxb3 14. axb3 Bf5 15. b4 0-0 16. Re1 Qd7 17. h3 Rfd8 18. g4 Bg6 19. Bf4 a5 20. bxa5 Rxa5 21. Ba2 Rf8 22. e6 Qd8 23. exf7+ Kh8 24. Qd2 Qa8 25. Nd4 Nxd4 26. cxd4 Bh4 27. Bd5 Qxd5 28. Rxa5 Qxf7 29. Rxb5 h6 30. Bg3 Bxg3 31. fxg3 Qd7 32. Rbe5 Qxd4+ 33. Qe3 Qxb2 34. h4 Qc2 1/2-1/2

[Event "ESP-chT15 Gold email"]
[Site "ICCF email"]
[Date "2017.02.25"]
[Round "?.2"]
[White "Romm, Mikhail Yakovlevich"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D87"]
[WhiteElo "2445"]
[PlyCount "47"]
[EventDate "2017.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "10"]
[EventCountry "ESP"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Russia"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "RUS"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 Nc6 9. Be3 0-0 10. 0-0 b6 11. dxc5 Qc7 12. Nd4 Ne5 13. Nb5 Qb8 14. Be2 bxc5 15. Rb1 a6 16. Nd4 Qc7 17. Nb3 Rd8 18. Qc2 c4 19. Nc5 Nd3 20. Nxd3 cxd3 21. Bxd3 Qxc3 22. Qxc3 Bxc3 23. Bc4 Bd7 24. Rfc1 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2017.02.04"]
[Round "6.4"]
[White "Piceu, Tom"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2373"]
[BlackElo "2454"]
[PlyCount "26"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Sas van Gent"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Qa4+ Nc6 6. Bg5 h6 7. Bxf6 Qxf6 8. e3 0-0 9. Bd3 dxc4 10. Bxc4 e5 11. 0-0 Bd6 12. Ne4 Qg6 13. Nxd6 cxd6 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.12.17"]
[Round "5.10"]
[White "De Jong, Jan Willem"]
[Black "Schoorl, Rob"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "2454"]
[BlackElo "2315"]
[PlyCount "163"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Calder HMC"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Bc4 Nc6 5. c3 e5 6. 0-0 Nf6 7. dxe5 Nxe5 8. Nxe5 dxe5 9. Qxd8+ Kxd8 10. Bxf7 Nxe4 11. f3 Nd6 12. Bg5+ Kd7 13. Bb3 b6 14. Nd2 Bb7 15. Rad1 h6 16. Bh4 Rhf8 17. Rfe1 Rae8 18. Nc4 b5 19. Na5 Ba8 20. c4 Kc8 21. cxb5 Nxb5 22. Bd5 Bxd5 23. Rxd5 a6 24. Nc4 e4 25. a4 Nd4 26. Bf2 Nc6 27. fxe4 Rf4 28. Nd2 Bxb2 29. Be3 Rf6 30. Nc4 Bc3 31. Rc1 Bb4 32. e5 Rfe6 33. Bxh6 Nxe5 34. Nxe5 Rxe5 35. Rxe5 Rxe5 36. Kf2 Ra5 37. Rc6 Bd6 38. Rc4 Rh5 39. Bf4 Bxf4 40. Rxf4 Rxh2 41. Rf6 Kb7 42. Rxg6 Rh4 43. g4 Rh2+ 44. Kf3 Ra2 45. Re6 Ra3+ 46. Kf4 Rxa4+ 47. Kf5 Ra1 48. g5 Rf1+ 49. Ke5 a5 50. g6 a4 51. g7 Rg1 52. Kf6 a3 53. Re1 Rg2 54. Rf1 Kb6 55. Ra1 Rf2+ 56. Ke7 Rg2 57. Kf8 Rf2+ 58. Ke7 Rg2 59. Kf7 Rf2+ 60. Ke6 Rg2 61. Kf7 Rf2+ 62. Ke8 Rg2 63. Kf8 Rf2+ 64. Ke7 Rg2 65. Kf8 Rf2+ 66. Ke7 Rg2 67. Kf7 Rf2+ 68. Ke6 Rg2 69. Kf7 Rf2+ 70. Ke7 Rg2 71. Kf7 Rf2+ 72. Ke6 Rg2 73. Kf7 Rf2+ 74. Ke7 Rg2 75. Kf7 Rf2+ 76. Ke6 Rg2 77. Kf7 Rf2+ 78. Ke7 Rg2 79. Kf7 Rf2+ 80. Ke6 Rg2 81. Kf7 Rf2+ 82. Ke6 1/2-1/2

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.11.26"]
[Round "4.6"]
[White "Kuipers, Stefan"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2404"]
[BlackElo "2454"]
[PlyCount "156"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]
[WhiteTeam "Apeldoorn"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Bc5 7. Nc3 d6 8. Nd5 h6 9. c3 0-0 10. 0-0 Rb8 11. d4 Ba7 12. Be3 Ng4 13. dxe5 Nxe3 14. Nxe3 Bxe3 15. fxe3 dxe5 16. Qxd8 Nxd8 17. Nxe5 Rb6 18. Rad1 Rd6 19. Rxd6 cxd6 20. Nf3 Nb7 21. Rd1 Re8 22. Bd5 Nc5 23. Bc6 Re6 24. Rd4 Bd7 25. Bxd7 Nxd7 26. Nd2 Ne5 27. Kf2 Kf8 28. Ke2 Ke7 29. b3 Kd7 30. a3 Re8 31. c4 Rc8 32. cxb5 axb5 33. Nf3 Nc6 34. Rd5 Ra8 35. Rxb5 Rxa3 36. Rb7+ Ke8 37. Rb6 Ra2+ 38. Kf1 Kd7 39. Rb7+ Ke6 40. Rc7 Ne5 41. Nxe5 Kxe5 42. Rxf7 g6 43. Re7+ Kf6 44. Rc7 Rb2 45. Rc3 Ke5 46. Rd3 g5 47. h3 Kxe4 48. Rxd6 Kxe3 49. Re6+ Kf4 50. Rf6+ Ke5 51. Rf3 h5 52. Rc3 Kf4 53. Kg1 h4 54. Rc4+ Kf5 55. Rb4 Kg6 56. Rb5 Kf6 57. Rb8 Kf5 58. Rb6 Ke5 59. Rb8 Kf5 60. Rf8+ Kg6 61. Rf3 g4 62. hxg4 Kg5 63. Kh2 Kxg4 64. Rc3 Rb1 65. Rc4+ Kg5 66. Rb4 Kh5 67. Rb8 Kg5 68. b4 Rb3 69. b5 Kf6 70. b6 Kg7 71. b7 Kh7 72. Kg1 Rb2 73. Kf1 Kg7 74. Ke1 h3 75. gxh3 Kh7 76. h4 Kg7 77. h5 Kh7 78. h6 Rb1+ 1/2-1/2

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.12"]
[Round "7.6"]
[White "Rosenthal, Jonathan"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "2333"]
[BlackElo "2447"]
[PlyCount "117"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Zuerich SG"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "SUI"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 0-0 6. e3 h6 7. Bh4 b6 8. Bxf6 Bxf6 9. cxd5 exd5 10. Be2 Bb7 11. 0-0 Nd7 12. Qb3 c6 13. Rfd1 Re8 14. Qc2 Be7 15. Rab1 a5 16. a3 Bd6 17. Ne1 Nf6 18. Bf3 Qe7 19. Nd3 c5 20. dxc5 bxc5 21. Nb5 c4 22. Nc1 Be5 23. Ne2 Rac8 24. Nbc3 Red8 25. Nd4 g6 26. Rd2 Ne4 27. Nxe4 dxe4 28. Be2 Bxd4 29. Rxd4 Rxd4 30. exd4 e3 31. Rf1 Qg5 32. f3 Bd5 33. Qc3 Rb8 34. Bd1 Kh7 35. Re1 Rb3 36. Bxb3 Bxf3 37. g3 cxb3 38. Qxb3 Bd5 39. Qxe3 Qf5 40. Qf2 Qd3 41. h4 h5 42. Kh2 a4 43. Re5 Be6 44. Qe3 Qd1 45. Rc5 Bb3 46. Rc1 Qg4 47. Qd3 Qe6 48. Rc5 Bd5 49. Qb5 Bb3 50. Re5 Qd6 51. Qd3 Kg7 52. Qe4 Qf6 53. Qf4 Qc6 54. Rc5 Qa6 55. Qe5+ Kh7 56. d5 Qf1 57. Qf4 Qe2+ 58. Kh3 Bxd5 59. Rxd5 1/2-1/2

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.11"]
[Round "6.6"]
[White "De Jong, Jan Willem"]
[Black "Schmidt Schaeffer, Sebastian"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2447"]
[BlackElo "2386"]
[PlyCount "91"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Riehen"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "SUI"]

1. d4 f5 2. Bg5 h6 3. Bh4 g5 4. Bg3 Nf6 5. e3 Bg7 6. Nc3 e6 7. h4 d6 8. hxg5 hxg5 9. Rxh8+ Bxh8 10. Nh3 g4 11. Nf4 Bd7 12. Qd2 Nc6 13. 0-0-0 Qe7 14. d5 Ne5 15. Qd4 Kf7 16. Bb5 c6 17. dxe6+ Bxe6 18. Ba4 Nc4 19. Nxe6 Qxe6 20. Bb3 d5 21. Bxc4 dxc4 22. Qf4 Nd5 23. Nxd5 cxd5 24. Qc7+ Kg6 25. Qxb7 Rd8 26. c3 a6 27. Bf4 Bg7 28. f3 Rd7 29. Qc8 Kf7 30. e4 fxe4 31. fxe4 d4 32. Qc5 dxc3 33. Rxd7+ Qxd7 34. Qxc4+ Qe6 35. Qxe6+ Kxe6 36. b3 Be5 37. Be3 Bf6 38. Kc2 Ke5 39. Kd3 Bh4 40. Bd4+ Kf4 41. Bxc3 Be7 42. Be1 Bd8 43. b4 Bb6 44. a4 Ba7 45. g3+ Ke5 46. Bd2 1-0

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.10"]
[Round "5.6"]
[White "Radovic, Luka"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "D78"]
[WhiteElo "2260"]
[BlackElo "2447"]
[PlyCount "62"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Jelica Goracici"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "SRB"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 d5 5. 0-0 0-0 6. d4 dxc4 7. Nc3 c6 8. a4 Na6 9. a5 Nd5 10. e4 Ndb4 11. Be3 b5 12. axb6 axb6 13. h3 Bb7 14. Qd2 e6 15. Rfd1 c5 16. d5 exd5 17. exd5 Nc7 18. Rxa8 Qxa8 19. Bh6 Ncxd5 20. Bxg7 Kxg7 21. Ne5 Nf6 22. Bxb7 Qxb7 23. Nxc4 Nc6 24. Nd6 Qd7 25. Nde4 Nd4 26. Qe3 Nxe4 27. Qxe4 Qxh3 28. Qe5+ f6 29. Qf4 Re8 30. Ra1 Re7 31. b4 g5 0-1

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.09"]
[Round "4.6"]
[White "Mydlarik, Martin"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2084"]
[BlackElo "2447"]
[PlyCount "48"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Modra"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "SVK"]
[BlackTeamCountry "NED"]

1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 Bc5 5. Nf3 d6 6. d3 h6 7. 0-0 a6 8. a3 0-0 9. b4 Ba7 10. h3 Be6 11. e4 Nh7 12. Nh4 Nd4 13. Kh2 b5 14. cxb5 axb5 15. Nf5 c6 16. Ne2 Nxf5 17. exf5 Bxf5 18. Bxc6 Bxh3 19. Bxa8 Bxf1 20. Qxf1 Qxa8 21. Qg2 Qc8 22. Ra2 Nf6 23. f3 Qf5 24. Rc2 Qh5+ 0-1

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.08"]
[Round "3.6"]
[White "De Jong, Jan Willem"]
[Black "Moen, Ole Christian"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2447"]
[BlackElo "2165"]
[PlyCount "150"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Oslo Schakselskap"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NOR"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. Be3 Nc6 8. d5 Ne7 9. Nd2 Ne8 10. f3 f5 11. c5 Kh8 12. Nc4 Ng8 13. Qd2 Bh6 14. Bxh6 Qh4+ 15. g3 Qxh6 16. cxd6 cxd6 17. Nb5 Rf6 18. Qxh6 Nxh6 19. Rc1 fxe4 20. fxe4 Bh3 21. Rg1 Bd7 22. a4 Kg7 23. Kd2 Rd8 24. Nxa7 Rf2 25. Ke3 Rxh2 26. Nb5 Ng4+ 27. Bxg4 Bxg4 28. Nd2 Rd7 29. Rcf1 Be2 30. Rf2 Rxf2 31. Kxf2 Bxb5 32. axb5 Rc7 33. Ke3 Rc2 34. Rb1 Nc7 35. Kd3 Rc5 36. b4 Rxb5 37. Nc4 Nxd5 38. exd5 Rxd5+ 39. Ke3 Rd4 40. Na5 b6 41. Nc6 Rg4 42. Rd1 Rxg3+ 43. Ke4 h5 44. Rxd6 h4 45. Nxe5 h3 46. Rd1 Kf6 47. Kf4 Rb3 48. Rd6+ Ke7 49. Rxg6 Rxb4+ 50. Kg3 Rb3+ 51. Nf3 b5 52. Rh6 Rc3 53. Kf4 b4 54. Rxh3 Kd6 55. Rh5 Rc5 56. Rh1 Rc4+ 57. Ke3 Rc3+ 58. Ke2 b3 59. Nd2 Kd5 60. Rb1 Rh3 61. Nxb3 Rh2+ 62. Kd3 Rh3+ 63. Kc2 Rh2+ 64. Kc3 Rh3+ 65. Kb4 Rh4+ 66. Kb5 Rh5 67. Rd1+ Ke4+ 68. Kc4 Rh8 69. Re1+ Kf4 70. Nd4 Ra8 71. Ne6+ Kf5 72. Kd5 Ra5+ 73. Nc5 Kf4 74. Kd4 Ra8 75. Rf1+ Kg4 1/2-1/2

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.07"]
[Round "2.6"]
[White "Khairullin, Ildar"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2630"]
[BlackElo "2447"]
[PlyCount "65"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Mednyi Vsadnik"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "RUS"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 a6 6. c3 d6 7. a4 h6 8. Nbd2 0-0 9. Re1 Be6 10. h3 Ba7 11. b4 Re8 12. Bxe6 Rxe6 13. Qc2 Qd7 14. Nb3 Ree8 15. Bd2 Ne7 16. c4 Ng6 17. Bc3 Nh5 18. d4 Nhf4 19. Re3 Nxg2 20. Kxg2 Nf4+ 21. Kg1 Qxh3 22. Ne1 Qg4+ 23. Kf1 Qh5 24. Kg1 Re6 25. Ra2 Rae8 26. c5 exd4 27. Bxd4 dxc5 28. bxc5 Rxe4 29. Rxe4 Qg4+ 30. Kf1 Qh3+ 31. Kg1 Qg4+ 32. Kf1 Qh3+ 33. Kg1 1/2-1/2

[Event "EU-Cup 32nd"]
[Site "Novi Sad"]
[Date "2016.11.06"]
[Round "1.6"]
[White "De Jong, Jan Willem"]
[Black "Antunes, Andre Serigado Mira"]
[Result "1-0"]
[ECO "E08"]
[WhiteElo "2447"]
[BlackElo "1987"]
[PlyCount "111"]
[EventDate "2016.11.06"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "SRB"]
[SourceTitle "CBM 176"]
[Source "ChessBase"]
[SourceDate "2017.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2017.01.17"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Edinburgh"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "SCO"]

1. d4 Nf6 2. c4 e6 3. g3 c6 4. Nf3 d5 5. Bg2 Nbd7 6. 0-0 Be7 7. Qc2 0-0 8. b3 b6 9. Nc3 Bb7 10. Bb2 Rc8 11. Rfd1 Qc7 12. Rac1 Rfd8 13. Qb1 Qb8 14. e3 c5 15. cxd5 Nxd5 16. Ne4 N5f6 17. Nfd2 Nxe4 18. Bxe4 Nf6 19. Bxb7 Qxb7 20. dxc5 Rxc5 21. Rxc5 bxc5 22. Bxf6 Bxf6 23. Nc4 Rxd1+ 24. Qxd1 Qd5 25. Qxd5 exd5 26. Na5 Kf8 27. Nc6 c4 28. Kf1 a6 29. Nb4 cxb3 30. axb3 d4 31. Nxa6 dxe3 32. fxe3 Be7 33. b4 Ke8 34. b5 Kd7 35. Ke2 Kc8 36. Kd3 Kb7 37. Kc4 h5 38. e4 g5 39. h3 g4 40. hxg4 hxg4 41. Nc5+ Kc7 42. Nd3 Kb6 43. Ne5 Bd6 44. Nxf7 Bxg3 45. Nh6 Bh4 46. Nxg4 Kc7 47. e5 Kd7 48. Kc5 Be7+ 49. Kd5 Bd8 50. Ne3 Bg5 51. Nc4 Bd8 52. b6 Be7 53. e6+ Kc8 54. Kc6 Bd8 55. b7+ Kb8 56. Ne5 1-0

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.10.08"]
[Round "2.10"]
[White "Geurink, Jasper"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "2359"]
[BlackElo "2454"]
[PlyCount "148"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 0-0 6. Re1 d6 7. a4 Na5 8. Ba2 c5 9. h3 Nc6 10. Nc3 h6 11. Ne2 Be6 12. Ng3 Re8 13. c3 Bf8 14. Nh2 g6 15. Qf3 Bg7 16. h4 Bxa2 17. Rxa2 h5 18. Bg5 Qe7 19. Ngf1 Qe6 20. Raa1 Nh7 21. Bc1 Ne7 22. Ne3 Rf8 23. Nhf1 f5 24. Nd5 Nxd5 25. exd5 Qf7 26. Ne3 g5 27. Nc4 g4 28. Qd1 Qxd5 29. Qb3 Rf7 30. a5 Raf8 31. d4 exd4 32. Bf4 Rd8 33. Rad1 Nf8 34. cxd4 Bxd4 35. Bg5 Rdd7 36. Re8 f4 37. Qc2 Qf5 38. Qxf5 Rxf5 39. Be7 g3 40. Nxd6 Bxf2+ 41. Kf1 Rf7 42. Bg5 Bd4 43. Nxf7 Rxf7 44. b4 Kg7 45. Re7 Ng6 46. Rxf7+ Kxf7 47. bxc5 Bxc5 48. Rd7+ Ke6 49. Rxb7 Bd4 50. a6 Kf5 51. Bd8 Kg4 52. Rd7 Be3 53. Rg7 Kf5 54. Bg5 Ne5 55. Ke2 Bd4 56. Bd8 f3+ 57. gxf3 Ng6 58. Rxg6 Kxg6 59. Kf1 Kf5 60. Kg2 Ke6 61. Kxg3 Kd7 62. Bg5 Kc6 63. f4 Kd5 64. Kf3 Bb2 65. f5 Bd4 66. Be3 Bxe3 67. Kxe3 Ke5 68. f6 Kxf6 69. Kf4 Ke6 70. Kg5 Ke5 71. Kxh5 Kf5 72. Kh6 Kf6 73. h5 Kf7 74. Kg5 Kg7 1-0

[Event "NED-chT 1617"]
[Site "Netherlands"]
[Date "2016.09.17"]
[Round "1.10"]
[White "De Jong, Jan Willem"]
[Black "Kuijf, Marinus"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "2454"]
[BlackElo "2381"]
[PlyCount "29"]
[EventDate "2016.09.17"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 174 Extra"]
[Source "ChessBase"]
[SourceDate "2016.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Rotterdam Pathena"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 c6 3. Nf3 e6 4. e3 f5 5. Bd3 Nf6 6. 0-0 Bd6 7. b3 Qe7 8. Bb2 0-0 9. Qc1 b6 10. Nc3 Ne4 11. Ne2 Bb7 12. Ne5 c5 13. cxd5 exd5 14. f3 Ng5 15. f4 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "De Jong, Jan Willem"]
[Black "Jensen, Claus"]
[Result "1/2-1/2"]
[ECO "D43"]
[BlackElo "2385"]
[PlyCount "58"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Denmark"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "DEN"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5 9. Be2 Bb7 10. h4 g4 11. Ne5 Nbd7 12. Nxd7 Qxd7 13. Be5 Qe7 14. b3 Rg8 15. 0-0 Bg7 16. Qc2 Nh5 17. Bxg7 Rxg7 18. g3 Qd6 19. e5 Qxd4 20. Rad1 Qxe5 21. Ne4 Kf8 22. Rfe1 c5 23. Bxc4 bxc4 24. Nd6 Qf6 25. Nxb7 Qf3 26. Qd2 Nxg3 27. fxg3 Qxb7 28. Qxh6 Qf3 29. Qh8+ Ke7 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "De Jong, Jan Willem"]
[Black "Laghetti, Gaetano"]
[Result "1/2-1/2"]
[ECO "D76"]
[BlackElo "2467"]
[PlyCount "55"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Italy"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ITA"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nf3 Nb6 7. Nc3 Nc6 8. e3 0-0 9. 0-0 Re8 10. a3 e5 11. d5 Na5 12. Qc2 Bd7 13. Nd2 Nac4 14. b3 Nxd2 15. Bxd2 Rc8 16. a4 c6 17. dxc6 Bxc6 18. e4 Bf8 19. Rfd1 Bb4 20. Be3 Bd7 21. Rd3 Qc7 22. a5 Bb5 23. axb6 Bxd3 24. bxc7 Bxc2 25. Nd5 Be7 26. Rxa7 Bxb3 27. Nxe7+ Rxe7 28. Rxb7 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "De Jong, Jan Willem"]
[Black "Ljubicic, Ante"]
[Result "1/2-1/2"]
[ECO "D78"]
[BlackElo "2487"]
[PlyCount "62"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Croatia"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "CRO"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Nf3 Bg7 5. Bg2 0-0 6. 0-0 d5 7. b3 dxc4 8. bxc4 c5 9. Bb2 Qb6 10. Qb3 Ne4 11. e3 Nc6 12. Ne5 Nd6 13. Nxc6 bxc6 14. dxc5 Qxc5 15. Bxg7 Kxg7 16. Nd2 Be6 17. Rfc1 Rab8 18. Qd3 Rfc8 19. Nb3 Qb4 20. Qd4+ f6 21. Qxa7 Rb7 22. Qc5 Bxc4 23. Qxb4 Rxb4 24. Na5 Ra4 25. Nxc6 Kf8 26. Rc2 Rca8 27. Nb4 R8a5 28. Rb2 Bf7 29. Nc6 Rxa2 30. Raxa2 Rxa2 31. Rxa2 Bxa2 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "De Jong, Jan Willem"]
[Black "Nataf, Igor Alexandre"]
[Result "1/2-1/2"]
[ECO "D38"]
[BlackElo "2489"]
[PlyCount "39"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "France"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "FRA"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qb3 c5 8. cxd5 exd5 9. a3 Bxc3+ 10. Qxc3 b6 11. e3 Nd7 12. Be2 0-0 13. 0-0 Bb7 14. a4 Rfc8 15. b3 Qe7 16. Qb2 Rc7 17. Rfc1 Bc8 18. a5 Rb8 19. axb6 axb6 20. Ne1 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "Del Rio, Roland"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C81"]
[WhiteElo "2422"]
[PlyCount "59"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Germany"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 0-0 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Na5 16. Nd4 c5 17. Nxe6 fxe6 18. f3 c4 19. fxe4 cxb3 20. exd5 bxa2 21. Rxa2 Nc4 22. Qd4 Qb3 23. Nc3 Rac8 24. dxe6 Nxb2 25. e7 Rfe8 26. Qd5+ Qxd5 27. Rxd5 Rxc3 28. e6 Rc1+ 29. Kf2 Rc7 30. Rd7 1/2-1/2

[Event "olm21 sf03 email"]
[Site "ICCF email"]
[Date "2016.09.01"]
[Round "?.1"]
[White "Salcedo Mederos, Pablo"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2356"]
[PlyCount "52"]
[EventDate "2016.??.??"]
[EventType "team-tourn (corr)"]
[EventRounds "9"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Cuba"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "CUB"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 a6 6. 0-0 d6 7. Bb3 h6 8. Nbd2 0-0 9. Re1 Ba7 10. Nf1 Re8 11. h3 Be6 12. Ng3 Bxb3 13. Qxb3 Qd7 14. Be3 Bxe3 15. Rxe3 d5 16. Rd1 Rad8 17. Ree1 b6 18. d4 Nxe4 19. Nxe4 dxe4 20. dxe5 Qf5 21. Nd4 Nxd4 22. cxd4 c5 23. Qxb6 cxd4 24. Rxd4 Rxd4 25. Qxd4 Qxe5 26. Qxe5 Rxe5 1/2-1/2

[Event "LAT-NED email"]
[Site "ICCF email"]
[Date "2016.05.16"]
[Round "?.1"]
[White "Avotins, Maigonis"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "C83"]
[WhiteElo "2454"]
[PlyCount "89"]
[EventDate "2015.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Latvia"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "LAT"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Nbd2 Nc5 10. c3 Be7 11. Bc2 d4 12. Nb3 d3 13. Bb1 Nxb3 14. axb3 Bf5 15. Re1 0-0 16. Be3 Qd5 17. Bd4 d2 18. Re2 Bxb1 19. Rxb1 Nxd4 20. Nxd4 Bg5 21. g3 c5 22. Nf5 Qd3 23. Nd6 Qg6 24. h4 Bxh4 25. Rxd2 Be7 26. Ra1 f6 27. Qf3 fxe5 28. Qd5+ Kh8 29. Qxe5 Bg5 30. Rd5 Bf4 31. Qe4 Bxd6 32. Qxg6 hxg6 33. Rxd6 b4 34. Rxg6 bxc3 35. bxc3 Rab8 36. Raxa6 Rxb3 37. Ra7 Rb2 38. Rgxg7 Rfxf2 39. Rh7+ Kg8 40. Rag7+ Kf8 41. Rc7 Kg8 42. Rhd7 Rg2+ 43. Kf1 Rbf2+ 44. Ke1 Rf3 45. Rd8+ 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.04.23"]
[Round "9.2"]
[White "De Jong, Jan Willem"]
[Black "Okkes, Menno"]
[Result "1/2-1/2"]
[ECO "E39"]
[WhiteElo "2453"]
[BlackElo "2336"]
[PlyCount "37"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Utrecht"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 0-0 6. Nf3 Na6 7. g3 Nxc5 8. Bg2 b6 9. 0-0 Bb7 10. Nb5 Be4 11. Qd1 Nb7 12. a3 Be7 13. Bf4 a6 14. Nc3 Bc6 15. b4 Rc8 16. Qb3 Nd6 17. Bxd6 Bxd6 18. Rac1 Ba8 19. Nd2 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.04.02"]
[Round "8.4"]
[White "Meng, Roger"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2357"]
[BlackElo "2457"]
[PlyCount "137"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Charlois Europoort"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 g6 4. 0-0 Bg7 5. c4 c6 6. cxd5 cxd5 7. Nc3 Nc6 8. d4 0-0 9. Ne5 Nd7 10. Nxd5 Ndxe5 11. dxe5 Nxe5 12. Bg5 f6 13. Bf4 e6 14. Nc3 f5 15. Qb3 Qe7 16. Rfd1 g5 17. Be3 f4 18. Bd4 Nc6 19. Bxg7 Qxg7 20. Ne4 Kh8 21. Nd6 e5 22. Bxc6 bxc6 23. Rac1 Bg4 24. f3 Rab8 25. Qc3 Be6 26. g4 Bxa2 27. Nf5 Rxf5 28. gxf5 Bd5 29. h3 Qf6 30. Ra1 Qxf5 31. Rxa7 Re8 32. Kf2 Qxh3 33. Rg1 Qh4+ 34. Kf1 Qh3+ 35. Ke1 Qf5 36. Qd3 e4 37. Qc3+ Qe5 38. fxe4 Bxe4 39. Rxg5 Qxc3+ 40. bxc3 Bd3 41. Kd2 Bxe2 42. Rgg7 Bc4 43. Rxh7+ Kg8 44. Rag7+ Kf8 45. Rg4 Re2+ 46. Kc1 Re1+ 47. Kb2 Re2+ 48. Ka3 c5 49. Rxf4+ Kg8 50. Rxc4 Kxh7 51. Rxc5 Kg6 52. Rd5 Kf6 53. Kb4 Re8 54. c4 Ke6 55. Kc3 Rc8 56. Rd4 Ke5 57. Rd1 Ke6 58. Rd5 Rb8 59. Kd4 Rh8 60. Kc5 Rc8+ 61. Kb4 Rb8+ 62. Rb5 Rh8 63. Rb7 Kd6 64. Rb6+ Kc7 65. Rg6 Rh5 66. Ra6 Rg5 67. c5 Rg1 68. Kb5 Rb1+ 69. Kc4 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.03.19"]
[Round "7.9"]
[White "Otten, Remmelt"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2166"]
[BlackElo "2453"]
[PlyCount "58"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "BSG"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. e5 Ng4 8. 0-0 Bc5 9. Bf4 g5 10. Bd2 Nxe5 11. Re1 Qe7 12. Bc3 Bd6 13. Na3 0-0 14. f4 gxf4 15. Bxh7+ Kg7 16. Bd3 Rh8 17. b4 Qg5 18. Qd2 f6 19. Bxe5 Bxe5 20. c3 Rxh2 21. Rxe5 Qh4 22. Re7+ Kf8 23. Re8+ Kxe8 24. Qe1+ Kf7 25. Bg6+ Kxg6 26. Qe8+ Kf5 27. g4+ Qxg4+ 28. Kxh2 f3 29. Rg1 Qh4# 0-1

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.02.13"]
[Round "6.1"]
[White "De Jong, Jan Willem"]
[Black "Henrichs, Thomas"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2453"]
[BlackElo "2464"]
[PlyCount "45"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "SISSA"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 c6 6. a3 Ba5 7. Qc2 d5 8. Ng3 Nbd7 9. Be2 e5 10. 0-0 exd4 11. exd4 dxc4 12. Bxc4 Bc7 13. Ba2 Nb6 14. Re1 Be6 15. Bxe6 fxe6 16. Nce4 Bxg3 17. hxg3 Qxd4 18. Ng5 Rfe8 19. Bf4 e5 20. Nf3 Qc4 21. Qxc4+ Nxc4 22. Nxe5 Nb6 23. Rad1 1/2-1/2

[Event "Leiden Noteboom Memorial 76th"]
[Site "Leiden"]
[Date "2016.02.07"]
[Round "5"]
[White "De Jong, Jan Willem"]
[Black "De Jong, Migchiel"]
[Result "0-1"]
[ECO "D94"]
[WhiteElo "2455"]
[BlackElo "2338"]
[PlyCount "116"]
[EventDate "2016.02.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. d4 0-0 5. e4 c6 6. Be2 d5 7. exd5 cxd5 8. 0-0 Nc6 9. Re1 dxc4 10. Bxc4 Bg4 11. d5 Na5 12. Be2 Rc8 13. h3 Bxf3 14. Bxf3 Nc4 15. Qb3 Qd7 16. Be2 Nd6 17. Be3 a6 18. Rad1 b5 19. a4 Rb8 20. axb5 axb5 21. Na2 b4 22. Nc1 Qb7 23. Bf3 Nd7 24. Ne2 Qb5 25. Nd4 Bxd4 26. Bxd4 Nf5 27. Be3 Nxe3 28. Qxe3 Rfe8 29. Rc1 Qb6 30. Rc6 Qxe3 31. Rxe3 Kf8 32. Kf1 f6 33. Be2 Ne5 34. Rc7 Rec8 35. Rxc8+ Rxc8 36. f4 Nc4 37. Rd3 Nxb2 38. Rb3 Nc4 39. Kf2 Nb6 40. d6 exd6 41. Rxb4 Nd5 42. Rd4 Nc3 43. Bf3 Ke7 44. g4 d5 45. Rb4 Rc7 46. Ke3 Na2 47. Rb6 Rc3+ 48. Kf2 d4 49. Rb7+ Kd8 50. Rxh7 d3 51. Bd1 Rc1 52. Ba4 Nc3 53. Rd7+ Kc8 54. Rxd3 Nxa4 55. g5 fxg5 56. Rd6 gxf4 57. Rxg6 Nc5 58. h4 Nd3+ 0-1

[Event "Leiden Noteboom Memorial 76th"]
[Site "Leiden"]
[Date "2016.02.06"]
[Round "2"]
[White "De Jong, Jan Willem"]
[Black "Otte, Marijn Willem"]
[Result "1-0"]
[ECO "A37"]
[WhiteElo "2455"]
[BlackElo "2225"]
[PlyCount "100"]
[EventDate "2016.02.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. c4 Nc6 5. Nc3 e5 6. a3 Nge7 7. 0-0 0-0 8. Rb1 d6 9. b4 Rb8 10. bxc5 dxc5 11. Ne1 Be6 12. d3 Qd7 13. Nc2 Bh3 14. Ne3 Bxg2 15. Kxg2 f5 16. Ned5 h6 17. Qa4 Qe6 18. Be3 b6 19. Nxe7+ Nxe7 20. Qxa7 e4 21. Nd5 Nxd5 22. cxd5 Qxd5 23. dxe4 Qxe4+ 24. Kg1 Qc6 25. Rfc1 Be5 26. Qa6 Qf6 27. Bxh6 Rf7 28. Bf4 Bxf4 29. gxf4 Kg7 30. Rxc5 bxc5 31. Qxf6+ Kxf6 32. Rxb8 Ra7 33. Rb6+ Kf7 34. Rc6 Rxa3 35. Rxc5 Ra2 36. e3 Kf6 37. Kg2 Rb2 38. Rc6+ Kf7 39. Rc7+ Kf6 40. Rh7 Ra2 41. h4 Rb2 42. h5 gxh5 43. Rh6+ Kf7 44. Rxh5 Kg6 45. Rh8 Ra2 46. Rb8 Rc2 47. Rb6+ Kh5 48. Kg3 Ra2 49. Kf3 Ra3 50. Rf6 Ra5 1-0

[Event "Leiden Noteboom Memorial 76th"]
[Site "Leiden"]
[Date "2016.02.06"]
[Round "3"]
[White "Kuipers, Eelco"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2308"]
[BlackElo "2455"]
[PlyCount "132"]
[EventDate "2016.02.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Bc4 Nf6 5. f3 e3 6. Bxe3 Nbd7 7. Nge2 e6 8. 0-0 Be7 9. Kh1 0-0 10. Ne4 b6 11. Qe1 Re8 12. Rd1 Nf8 13. Nxf6+ Bxf6 14. Nf4 Bg5 15. Nd3 Bxe3 16. Qxe3 Qd6 17. Bb3 Ba6 18. c4 Rad8 19. Nf2 Ng6 20. Rfe1 Qb8 21. Ne4 Ne7 22. c5 Nf5 23. Qf2 Qf4 24. g3 Qc7 25. g4 Ne7 26. Nd6 Rxd6 27. cxd6 Qxd6 28. Qg3 Qd7 29. Qe5 Bb7 30. Kg1 Ng6 31. Qg3 Rd8 32. h4 Ne7 33. Qe5 Ng6 34. Qg3 Qe7 35. h5 Nf8 36. a3 h6 37. Bc2 Qf6 38. Qf2 Qf4 39. Be4 Nd7 40. Qh2 Qg5 41. Qc7 Ba8 42. Kf2 Qh4+ 43. Qg3 Qe7 44. Qc7 Re8 45. Rc1 Qh4+ 46. Qg3 Qf6 47. Qd6 Rd8 48. Bxc6 Nc5 49. dxc5 Rxd6 50. cxd6 Qxb2+ 51. Kg3 Bxc6 52. Rxc6 Qd2 53. Rec1 e5 54. R1c4 Kh7 55. a4 Qd5 56. Kf2 a6 57. Ke3 b5 58. axb5 axb5 59. R4c5 Qd4+ 60. Ke2 e4 61. fxe4 Qxe4+ 62. Kd2 Qxg4 63. Kc3 f5 64. Rd5 Qf3+ 65. Kd4 Qe4+ 66. Kc5 Qc4+ 0-1

[Event "Leiden Noteboom Memorial 76th"]
[Site "Leiden"]
[Date "2016.02.05"]
[Round "1"]
[White "Bakker, Guido"]
[Black "De Jong, Jan Willem"]
[Result "0-1"]
[ECO "D12"]
[WhiteElo "2133"]
[BlackElo "2455"]
[PlyCount "96"]
[EventDate "2016.02.05"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 Bf5 5. Nc3 e6 6. Qb3 Qb6 7. Be2 Nbd7 8. Bd2 Be7 9. 0-0 0-0 10. c5 Qc7 11. Nh4 Ng4 12. Nf3 e5 13. h3 Ngf6 14. Qd1 e4 15. Ne1 h6 16. b4 Rfe8 17. b5 Nf8 18. bxc6 bxc6 19. Ba6 Ng6 20. Qa4 Rab8 21. Ne2 Qd7 22. Kh2 Nh4 23. Rh1 Bd8 24. Kg1 Nh7 25. Kf1 g5 26. Ng1 Be6 27. Nc2 Bf5 28. Nb4 Re6 29. Rb1 Bg6 30. Rb3 f5 31. Be2 Be8 32. g3 Ng6 33. Ba6 h5 34. Ne2 h4 35. Kg2 Bc7 36. Nc2 Rxb3 37. Qxb3 Qf7 38. Rb1 Rf6 39. Ne1 hxg3 40. fxg3 f4 41. exf4 gxf4 42. Nxf4 Nxf4+ 43. Bxf4 Rxf4 44. gxf4 Qxf4 45. Bc8 Bh5 46. Bg4 Nf6 47. Bxh5 Nxh5 48. Qc3 Qh2+ 0-1

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2016.01.09"]
[Round "5.8"]
[White "De Jong, Jan Willem"]
[Black "Verlinde, Tieme"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "2453"]
[BlackElo "2294"]
[PlyCount "81"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 170 Extra"]
[Source "ChessBase"]
[SourceDate "2016.02.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.02.25"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. Be3 Nc6 8. d5 Ne7 9. Nd2 Nd7 10. f3 f5 11. b4 b6 12. Nb3 Nf6 13. c5 f4 14. Bf2 g5 15. a4 h5 16. a5 bxc5 17. bxc5 Ng6 18. a6 g4 19. Na5 Nh7 20. Nc6 Qg5 21. Nb5 g3 22. Bg1 Nh4 23. Kd2 Nxg2 24. Nxc7 Bd7 25. Nxa8 Rxa8 26. Qb3 Nf6 27. Kc2 Ne1+ 28. Rxe1 g2 29. Bf2 gxh1Q 30. Rxh1 Qg2 31. Rf1 dxc5 32. Qb7 Re8 33. Qxa7 Bxc6 34. dxc6 Ng4 35. Qd7 Ne3+ 36. Kc3 Nxf1 37. Qxe8+ Bf8 38. Bc4+ Kh7 39. Qxh5+ Bh6 40. c7 Qxf2 41. Qf5+ 1-0

[Event "AUS-NED email"]
[Site "ICCF email"]
[Date "2015.12.13"]
[Round "?.1"]
[White "De Jong, Jan Willem"]
[Black "Kerr, Stephen GR"]
[Result "1-0"]
[ECO "C83"]
[BlackElo "2466"]
[PlyCount "91"]
[EventDate "2015.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Netherlands"]
[BlackTeam "Australia"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "AUS"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Be3 Be7 10. c3 Nc5 11. Bc2 Nd7 12. Nd4 Ndxe5 13. Nxe6 fxe6 14. Nd2 0-0 15. f4 Nf7 16. Qh5 Nh6 17. Qh3 Nf5 18. g4 Nh4 19. Nf3 Nxf3+ 20. Rxf3 g6 21. f5 Ne5 22. Rf2 Qd7 23. Bd4 exf5 24. Bxe5 fxg4 25. Qe3 Rxf2 26. Qxf2 Rf8 27. Qd4 c6 28. Re1 Bh4 29. Bg3 Bxg3 30. hxg3 Qf7 31. Qe3 Kg7 32. a4 h5 33. Qe7 Qxe7 34. Rxe7+ Rf7 35. Rxf7+ Kxf7 36. a5 Kf6 37. Bd3 Kg7 38. Kf2 Kf6 39. Ke3 g5 40. Kf2 Ke5 41. Bg6 h4 42. Be8 Kd6 43. Bh5 c5 44. Bxg4 Ke5 45. gxh4 gxh4 46. Bc8 1-0

[Event "AUS-NED email"]
[Site "ICCF email"]
[Date "2015.12.13"]
[Round "?.1"]
[White "Kerr, Stephen GR"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2466"]
[PlyCount "56"]
[EventDate "2015.??.??"]
[EventType "team-match (corr)"]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "Corr 2017"]
[Source "ChessBase"]
[SourceDate "2017.09.19"]
[SourceVersion "1"]
[SourceVersionDate "2017.09.19"]
[SourceQuality "1"]
[WhiteTeam "Australia"]
[BlackTeam "Netherlands"]
[WhiteTeamCountry "AUS"]
[BlackTeamCountry "NED"]

1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 e6 6. d3 Nge7 7. Bg5 h6 8. Bd2 d5 9. Qc1 b6 10. 0-0 Bb7 11. cxd5 exd5 12. e4 Nb4 13. Nxd5 Nexd5 14. exd5 Bxd5 15. Bxb4 cxb4 16. Re1+ Kf8 17. Qf4 Bf6 18. Qxb4+ Kg7 19. Rac1 Rc8 20. Rxc8 Qxc8 21. Ne5 Bxg2 22. Kxg2 Rd8 23. h4 Qa8+ 24. Kh2 Bxe5 25. Rxe5 Qf3 26. Qd2 Rxd3 27. Qe2 Qxe2 28. Rxe2 h5 1/2-1/2

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2015.12.12"]
[Round "4.2"]
[White "Khenkin, Igor"]
[Black "De Jong, Jan Willem"]
[Result "1-0"]
[ECO "D27"]
[WhiteElo "2605"]
[BlackElo "2453"]
[PlyCount "85"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 169 Extra"]
[Source "ChessBase"]
[SourceDate "2015.12.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.12.18"]
[SourceQuality "1"]
[WhiteTeam "En Passant"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. 0-0 a6 7. Nc3 b5 8. Be2 Bb7 9. dxc5 Bxc5 10. Qxd8+ Kxd8 11. Nd2 Nbd7 12. Nb3 Ke7 13. Nxc5 Nxc5 14. b4 Nce4 15. Nxe4 Nxe4 16. Bb2 f6 17. f3 Nd2 18. Rfc1 Rhc8 19. Bd4 e5 20. Bc5+ Ke6 21. Rc3 e4 22. f4 Bd5 23. Rd1 Nc4 24. Bg4+ f5 25. Bxf5+ Kxf5 26. Rxd5+ Ke6 27. Rd4 a5 28. a3 Kf5 29. h3 axb4 30. Bxb4 Rd8 31. g4+ Kg6 32. Rxe4 Rd2 33. Rcxc4 Rd1+ 34. Kf2 bxc4 35. Rxc4 Ra7 36. Rc6+ Kf7 37. e4 Rd3 38. e5 Rxh3 39. f5 Ra8 40. Rc7+ Kg8 41. f6 gxf6 42. exf6 Rf8 43. Rg7+ 1-0

[Event "NED-chT 1516"]
[Site "Netherlands"]
[Date "2015.11.07"]
[Round "3.7"]
[White "Bitalzadeh, Ali"]
[Black "De Jong, Jan Willem"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "2400"]
[BlackElo "2453"]
[PlyCount "63"]
[EventDate "2015.09.26"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2017"]
[Source "ChessBase"]
[SourceDate "2016.10.25"]
[SourceVersion "1"]
[SourceVersionDate "2016.10.25"]
[SourceQuality "1"]
[WhiteTeam "Groningen Combinatie"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 e6 6. 0-0 Nge7 7. d3 0-0 8. Bf4 d6 9. a3 b6 10. Qd2 Bb7 11. Bh6 e5 12. Nh4 Rb8 13. b4 Nd4 14. Rab1 Qd7 15. Bxg7 Kxg7 16. f4 Bxg2 17. Nxg2 f5 18. Ne3 exf4 19. gxf4 Rbe8 20. Rbe1 Kg8 21. Ned5 Nxd5 22. Nxd5 Ne6 23. e4 Nc7 24. Nxc7 Qxc7 25. exf5 Rxe1 26. Qxe1 Rxf5 27. Qe8+ Kg7 28. Re1 Rf7 29. Kg2 Qd7 30. Qxd7 Rxd7 31. Kf3 Kf6 32. Re8 1/2-1/2

[Event "EU-Cup 31st"]
[Site "Skopje"]
[Date "2015.10.24"]
[Round "7.3"]
[White "De Jong, Jan Willem"]
[Black "Holm, Kristian Stuvik"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2453"]
[BlackElo "2422"]
[PlyCount "83"]
[EventDate "2015.10.18"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "MKD"]
[SourceTitle "CBM 169"]
[Source "ChessBase"]
[SourceDate "2015.11.10"]
[SourceVersion "1"]
[SourceVersionDate "2015.11.10"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Vaalerenga"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NOR"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 g6 4. c4 c6 5. Qa4 Nbd7 6. cxd5 cxd5 7. d3 Bg7 8. 0-0 0-0 9. Nc3 h6 10. Bd2 e5 11. Rfc1 Nb6 12. Qa5 e4 13. Ne1 Bf5 14. Nb5 exd3 15. exd3 Ng4 16. Bc3 Ne5 17. Rd1 Re8 18. Qa3 Bf8 19. Bb4 a6 20. Nd4 Bxb4 21. Qxb4 Nc6 22. Nxc6 bxc6 23. Rac1 Bd7 24. Nf3 Nc8 25. Qf4 g5 26. Qd2 Nd6 27. h4 f6 28. hxg5 hxg5 29. Nd4 Qb6 30. Nb3 Nb7 31. Qc3 Kg7 32. Bf3 a5 33. Re1 Qb4 34. Rxe8 Rxe8 35. Qxb4 axb4 36. Bxd5 cxd5 37. Rc7 Nd6 38. Rxd7+ Nf7 39. Nd4 Ra8 40. Nc6 Rxa2 41. Nd8 Rxb2 42. Nxf7 1-0

