[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.30"]
[Round "9"]
[White "De Jong, Mathijs"]
[Black "Nicolai, Amir"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "2008"]
[BlackElo "2156"]
[PlyCount "43"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 c6 4. Nc3 dxc4 5. g3 Nf6 6. Bg2 Nbd7 7. 0-0 b5 8. e4 Bb7 9. e5 Nd5 10. Ng5 h6 11. Nxe6 fxe6 12. Qh5+ Ke7 13. Ne4 Qe8 14. Bg5+ hxg5 15. Qxh8 Kd8 16. Nxg5 Qe7 17. h4 Kc7 18. Qg8 Re8 19. Ne4 Qd8 20. Ng5 Qe7 21. Ne4 Qd8 22. Ng5 1/2-1/2

[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.29"]
[Round "8"]
[White "Nicolai, Amir"]
[Black "De Jong, Mathijs"]
[Result "1/2-1/2"]
[ECO "E65"]
[WhiteElo "2156"]
[BlackElo "2008"]
[PlyCount "168"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Nf3 Nf6 6. d4 cxd4 7. Nxd4 0-0 8. 0-0 d6 9. Nxc6 bxc6 10. Bxc6 Rb8 11. Bg2 Qa5 12. Qd3 Bf5 13. e4 Be6 14. b3 Nxe4 15. Bxe4 Qxc3 16. Qxc3 Bxc3 17. Rb1 Bf6 18. Bd2 h5 19. h4 Rfd8 20. Rfe1 Kg7 21. Rbc1 Rd7 22. Bc3 Bxc3 23. Rxc3 a5 24. a3 Rc7 25. Rec1 Rbc8 26. R3c2 Kf8 27. Kf1 a4 28. bxa4 Bxc4+ 29. Kg1 e6 30. Bd3 d5 31. a5 Ke7 32. a6 Kd6 33. a7 Rxa7 34. Bxc4 Rxc4 35. Rxc4 dxc4 36. Rxc4 Rxa3 37. Rf4 Ke7 38. Kg2 e5 39. Rb4 f6 40. Rb6 Rd3 41. Ra6 Rd6 42. Ra5 Ke6 43. Rb5 Kf5 44. Ra5 g5 45. hxg5 Kxg5 46. Rb5 Rd2 47. Ra5 h4 48. gxh4+ Kxh4 49. Ra4+ Kg5 50. Kg3 Rd4 51. Ra8 Rd3+ 52. Kg2 Kf4 53. Ra4+ Rd4 54. Ra3 e4 55. Rb3 f5 56. Ra3 Rd3 57. Ra5 Kg4 58. Ra4 Rd2 59. Rb4 Re2 60. Kf1 Rd2 61. Kg2 Kf4 62. Ra4 Ke5 63. Ra5+ Rd5 64. Ra8 f4 65. Re8+ Kd4 66. Kf1 Kd3 67. Ke1 Ra5 68. Rd8+ Kc4 69. f3 Ra1+ 70. Ke2 Ra2+ 71. Ke1 e3 72. Rf8 Kd4 73. Rd8+ Ke5 74. Re8+ Kf5 75. Rf8+ Kg5 76. Rg8+ Kh6 77. Rg4 Ra4 78. Ke2 Kh5 79. Ke1 Rd4 80. Ke2 Re4 81. Kd1 Rd4+ 82. Ke1 Re4 83. Kd1 Rd4+ 84. Ke1 Re4 1/2-1/2

[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.28"]
[Round "7"]
[White "De Jong, Mathijs"]
[Black "Van Batenburg, Mees"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2008"]
[BlackElo "2109"]
[PlyCount "95"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. d4 f5 2. Qd3 d5 3. Bf4 Nf6 4. Nc3 e6 5. Nf3 Bd6 6. Ne5 0-0 7. Nb5 Re8 8. Bg5 Be7 9. h3 Ne4 10. Bxe7 Qxe7 11. g4 Rf8 12. Bg2 c6 13. Nc3 Nd7 14. Nxd7 Bxd7 15. Bxe4 fxe4 16. Qg3 e5 17. Qxe5 Qxe5 18. dxe5 Rae8 19. e3 Rxe5 20. Ne2 Re7 21. Rc1 Ref7 22. Rh2 b5 23. b4 Rf6 24. Ra1 a5 25. a3 Ra8 26. Rb1 Rh6 27. Rg2 Rxh3 28. Kd2 Rh6 29. Kc3 Kf8 30. Kd4 Ke7 31. Kc5 axb4 32. axb4 Ra2 33. Rc1 Kd8 34. g5 Rh4 35. Kd6 Ra6 36. Rgg1 h6 37. g6 Rh5 38. Nd4 Kc8 39. Ke7 Ra7 40. Ra1 Rb7 41. Ra8+ Kc7 42. Kf7 Kd6 43. Kxg7 Bg4+ 44. Kf6 Rg5 45. Rd8+ Kc7 46. Rh8 Rb6 47. Rxh6 Rh5 48. Rxh5 1-0

[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.27"]
[Round "6"]
[White "Francs, Marats"]
[Black "De Jong, Mathijs"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1990"]
[BlackElo "2008"]
[PlyCount "129"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 Nf6 5. Nf3 Bg4 6. Bc4 e6 7. 0-0 c6 8. Be2 Nbd7 9. h3 Bh5 10. Ne5 Nxe5 11. dxe5 Qxd1 12. Bxd1 Bxd1 13. Rxd1 Nd7 14. f4 0-0-0 15. Be3 b6 16. Ne4 Be7 17. a4 f5 18. Nd6+ Bxd6 19. Rxd6 Nf8 20. Rxc6+ Kb7 21. Rc4 Ng6 22. a5 Rc8 23. Rxc8 Rxc8 24. a6+ Kb8 25. Rd1 Rxc2 26. Rd8+ Rc8 27. Rd7 Rc7 28. Rd6 Nf8 29. Rd8+ Rc8 30. Bxb6 Rxd8 31. Bxd8 Ng6 32. g3 Kc8 33. Ba5 Ne7 34. Bb4 Nd5 35. Bc5 Nc7 36. Bxa7 Nxa6 37. Kf2 Kb7 38. Bd4 Kc6 39. Ke3 h5 40. Kf3 Kd5 41. Bc3 Kc4 42. g4 hxg4+ 43. hxg4 g6 44. Kg3 Nc5 45. Kh4 Ne4 46. gxf5 gxf5 47. Be1 Kd3 48. b4 Ke2 49. Bg3 Kf3 50. b5 Nc5 51. b6 Nb7 52. Bh2 Kg2 53. Kg5 Kxh2 54. Kf6 Nc5 55. Ke7 Kg3 56. Kd6 Nb7+ 57. Kxe6 Kxf4 58. Kf6 Kg4 59. e6 f4 60. e7 Nd6 61. b7 Nxb7 62. e8Q f3 63. Qe4+ Kg3 64. Qxb7 Kf2 65. Kf5 1-0

[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.24"]
[Round "4"]
[White "De Jong, Mathijs"]
[Black "Van Rootselaar, Rik"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2008"]
[BlackElo "2105"]
[PlyCount "130"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 Nc6 3. Nf3 e6 4. g3 Bb4+ 5. Bd2 Bxd2+ 6. Nbxd2 0-0 7. Bg2 d6 8. e4 e5 9. d5 Ne7 10. c5 Nd7 11. cxd6 cxd6 12. 0-0 f5 13. exf5 Nf6 14. Nh4 Nxf5 15. Nxf5 Bxf5 16. Qb3 Qd7 17. Nc4 Bh3 18. f3 Bxg2 19. Kxg2 Rac8 20. Rac1 b6 21. Nd2 Rxc1 22. Rxc1 Qf7 23. Rc6 Rd8 24. Nc4 Qxd5 25. Rxd6 Rxd6 26. Nxd6 Qxb3 27. axb3 Nd7 28. b4 a6 29. Ne8 Kf7 30. Nc7 Nb8 31. Kf2 b5 32. Ke3 Ke7 33. Ke4 Kd7 34. Nd5 Nc6 35. f4 exf4 36. gxf4 Kd6 37. h4 g6 38. Nf6 h6 39. Ng4 h5 40. Ne5 Ne7 41. Nf7+ Ke6 42. Ne5 Kd6 43. Nf7+ Kd7 44. Ne5+ Ke6 45. Nxg6 Nc8 46. f5+ Kf6 47. Nf4 Nd6+ 48. Kd5 Kxf5 49. Nxh5 Nc4 50. Ng3+ Kg6 51. b3 Ne3+ 52. Kc5 Nc2 53. h5+ Kg5 54. h6 Kxh6 55. Nf5+ Kg5 56. Nd4 Na1 57. Kb6 Kf4 58. Kxa6 Ke3 59. Ne6 Nxb3 60. Kxb5 Nd2 61. Kc5 Ne4+ 62. Kc6 Nc3 63. Nc7 Kd4 64. Nb5+ Kc4 65. Nxc3 Kxb4 1/2-1/2

[Event "Groningen op 59th"]
[Site "Groningen"]
[Date "2023.12.23"]
[Round "3"]
[White "Vijayakumar, Rishi"]
[Black "De Jong, Mathijs"]
[Result "0-1"]
[ECO "D45"]
[WhiteElo "2104"]
[BlackElo "2008"]
[PlyCount "142"]
[EventDate "2023.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CB04_2024"]
[SourceDate "2023.10.16"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. Bd3 0-0 8. 0-0 b6 9. b3 Bb7 10. Bb2 Rc8 11. cxd5 cxd5 12. Qe2 Ne4 13. Rfc1 Nxc3 14. Rxc3 Rxc3 15. Bxc3 Qe7 16. Rc1 Rc8 17. Qd2 f5 18. b4 g5 19. b5 g4 20. Ne1 Nf6 21. a4 Ne4 22. Bxe4 fxe4 23. a5 Rc4 24. Qd1 h5 25. a6 Bc8 26. Bd2 Rxc1 27. Bxc1 Bd7 28. h3 Qg5 29. hxg4 Qxg4 30. f3 Qg3 31. f4 h4 32. Bd2 Bxb5 33. Qh5 Bd7 34. Nc2 h3 35. Qxh3 Qxh3 36. gxh3 Bc8 37. Nb4 Bxb4 38. Bxb4 Bxa6 39. Bd6 Be2 40. Kf2 Bf3 41. Bb8 a6 42. Bc7 b5 43. Ba5 Kf7 44. Kg3 Kg6 45. Bb4 Be2 46. Kf2 Bd1 47. Ke1 Bb3 48. Kf2 Bc4 49. Kg2 Kf7 50. Kg3 Be2 51. Kf2 Bh5 52. Kg3 Bg6 53. Kg4 Bf5+ 54. Kg3 Ke8 55. h4 Kd7 56. h5 Kc6 57. Ba5 b4 58. Bxb4 Kb5 59. Bd2 a5 60. h6 a4 61. Kh4 a3 62. Kg5 a2 63. Bc3 Kc4 64. Bb2 Kd3 65. Kf6 Kxe3 66. h7 Bxh7 67. Kxe6 Kxf4 68. Kxd5 e3 69. Kc4 e2 70. Bc3 e1Q 71. Bxe1 a1Q 0-1

[Event "Groningen op-B 57th"]
[Site "Groningen"]
[Date "2019.12.28"]
[Round "7"]
[White "Van der Meer, Henk"]
[Black "De Jong, Mathijs"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "1785"]
[BlackElo "1967"]
[PlyCount "83"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Bc4 e6 9. Nh3 Nf6 10. c3 Bd6 11. Bf4 0-0 12. Qf3 a5 13. 0-0 Na6 14. Rfe1 Nc7 15. Rad1 Bxf4 16. Nxf4 Ncd5 17. a3 Nxf4 18. Qxf4 Nd5 19. Qg4 Qc7 20. Re5 Rad8 21. Rde1 Rd7 22. Qf3 Nf6 23. a4 Bc2 24. Qe2 Bxa4 25. b3 Bb5 26. Bxb5 cxb5 27. Rc5 Qd8 28. Rxb5 Rd5 29. Ra1 b6 30. Rd1 Qc7 31. Rxd5 Nxd5 32. c4 Nc3 33. Qd2 Nxd1 34. Qxd1 a4 35. c5 axb3 36. Qxb3 bxc5 37. Qc4 Rc8 38. d5 exd5 39. Qxd5 Rd8 40. Qf3 Qd6 41. Kh2 c4 42. Qc3 0-1

[Event "Groningen op-B 57th"]
[Site "Groningen"]
[Date "2019.12.27"]
[Round "6"]
[White "De Jong, Mathijs"]
[Black "Pouw, Marcel Andre"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "1967"]
[BlackElo "1880"]
[PlyCount "69"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 a5 7. 0-0 0-0 8. Bg5 h6 9. a3 Be7 10. Bxf6 Bxf6 11. Nc3 d5 12. cxd5 exd5 13. Rc1 c6 14. e4 dxe4 15. Nxe4 Be7 16. Ne5 a4 17. Nc3 Bf6 18. f4 Bxe5 19. fxe5 b5 20. Ne4 Bc8 21. Nd6 Bd7 22. Rf4 Ra7 23. Qh5 Qg5 24. Qf3 Be6 25. Qf2 Ra6 26. h4 Qe7 27. g4 f6 28. Ne4 Nd7 29. exf6 gxf6 30. Ng3 Qd6 31. Nh5 Bc4 32. Rxc4 bxc4 33. Qc2 f5 34. Qxc4+ Rf7 35. Qxa6 1-0

[Event "Groningen op-B 57th"]
[Site "Groningen"]
[Date "2019.12.24"]
[Round "4"]
[White "De Jong, Mathijs"]
[Black "Matsumura, Cocoro"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "1967"]
[BlackElo "1805"]
[PlyCount "68"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 Be7 5. Bg2 0-0 6. 0-0 dxc4 7. Qc2 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bd2 Be4 11. Qc1 c6 12. Rd1 Nbd7 13. Nc3 Bg6 14. Bf4 Qb6 15. Ne5 Nxe5 16. Bxe5 Nd5 17. e4 Nxc3 18. Qxc3 Rac8 19. b4 f6 20. Bf4 e5 21. dxe5 fxe5 22. Be3 c5 23. Rac1 Qe6 24. bxc5 Qxa2 25. Ra1 Qc4 26. Qxc4+ bxc4 27. Rxa6 Bxc5 28. Bh3 Bxe3 29. Be6+ Kh8 30. fxe3 Rc5 31. Rad6 Ra5 32. Rd8 Ra8 33. Rxa8 Rxa8 34. Bxc4 Bxe4 1/2-1/2

[Event "Groningen op-B 57th"]
[Site "Groningen"]
[Date "2019.12.23"]
[Round "3"]
[White "Arnold, Lorin"]
[Black "De Jong, Mathijs"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1647"]
[BlackElo "1967"]
[PlyCount "56"]
[EventDate "2019.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Nf3 Bg4 7. 0-0 e6 8. Re1 Bd6 9. h3 Bh5 10. Bg5 h6 11. Be3 Nge7 12. Nbd2 0-0 13. Qb1 f5 14. Be2 f4 15. Ne5 Bxe2 16. Nxc6 Nxc6 17. Rxe2 fxe3 18. Rxe3 Rae8 19. Nf3 Qf7 20. Qc2 e5 21. dxe5 Nxe5 22. Nxe5 Rxe5 23. Rae1 Rxe3 24. Rxe3 Re8 25. Rxe8+ Qxe8 26. g3 Qe1+ 27. Kh2 Bc5 28. Kg2 Qe4+ 0-1

[Event "NED-chT 1718"]
[Site "Netherlands"]
[Date "2018.04.21"]
[Round "9.7"]
[White "Lemmers, Oscar"]
[Black "De Jong, Mathijs"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2346"]
[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 "Voerendaal"]
[BlackTeam "SISSA"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c6 2. c4 d5 3. exd5 cxd5 4. cxd5 Nf6 5. Nc3 Nxd5 6. Nf3 e6 7. Bc4 Nb6 8. Bb3 Be7 9. d4 0-0 10. 0-0 Nc6 11. Ne4 Nd5 12. a3 b6 13. Qd3 g6 14. Re1 Na5 15. Ba2 Bb7 16. Bh6 Re8 17. Rad1 Nf6 18. Neg5 Bd6 19. Nxf7 Kxf7 20. Ng5+ Kg8 21. Rxe6 1-0

