[Event "Ghent op-B 44th"]
[Site "Ghent"]
[Date "2023.07.16"]
[Round "4"]
[White "Groen, Jari"]
[Black "Dreelinck, Jacob"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1971"]
[BlackElo "2089"]
[PlyCount "116"]
[EventDate "2023.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Rb8 8. Be2 cxd4 9. Nxd4 Bc5 10. a3 0-0 11. b4 Bxd4 12. Bxd4 Nb6 13. Bc5 Ne7 14. 0-0 Bd7 15. Rf3 Re8 16. Bd3 h6 17. Ne2 Rc8 18. Nd4 Na4 19. Rg3 Nxc5 20. bxc5 Nf5 21. Bxf5 exf5 22. Qh5 Kf8 23. Nxf5 Bxf5 24. Qxf5 Kg8 25. Qh5 Rc6 26. Rb1 Qe7 27. Qf3 Qxc5+ 28. Qe3 Qxc2 29. Qd3 Qc5+ 30. Qe3 b6 31. Rd1 Rd8 32. f5 d4 33. Qe4 Qd5 34. Qxd5 Rxd5 35. Rgd3 Rc4 36. Kf2 Rxe5 37. Rxd4 Rxf5+ 38. Ke3 Re5+ 39. Kf4 Rxd4+ 40. Rxd4 Ra5 41. a4 g6 42. Kf3 Kg7 43. Ke3 Re5+ 44. Kf3 Kf6 45. Rd7 Ra5 46. Rd4 Ke6 47. Ke3 Rd5 48. Rc4 Rc5 49. Rd4 Re5+ 50. Kf3 Rd5 51. Rc4 Kd6 52. Ke3 Re5+ 53. Kf3 b5 54. axb5 Rxb5 55. Rc8 a5 56. Ra8 Kc5 57. Ra7 Kb4 58. Rxf7 Rf5+ 0-1

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.06"]
[Round "7"]
[White "Groen, Jari"]
[Black "Knol, Daniel"]
[Result "1-0"]
[ECO "B45"]
[WhiteElo "2028"]
[BlackElo "1819"]
[PlyCount "103"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bc5 7. Bf4 0-0 8. Bc7 Qe7 9. Bd6 Bxd6 10. Qxd6 Ne8 11. Qxe7 Nxe7 12. 0-0-0 a6 13. Nd6 Nxd6 14. Rxd6 b5 15. Bd3 Ra7 16. a4 b4 17. Nb1 f5 18. f3 fxe4 19. Bxe4 Nf5 20. Rb6 a5 21. Nd2 d5 22. Bd3 Ne3 23. Rg1 Bd7 24. b3 Rc8 25. Nf1 Nxf1 26. Rxf1 Rc6 27. Rxc6 Bxc6 28. Re1 Re7 29. Re5 h6 30. f4 Kf7 31. Kd2 Rc7 32. Be2 Kf6 33. h4 Be8 34. Bd3 Rc6 35. g4 Bg6 36. Bxg6 Kxg6 37. f5+ Kf6 38. Rxe6+ Rxe6 39. fxe6 Kxe6 40. c3 bxc3+ 41. Kxc3 Ke5 42. b4 d4+ 43. Kc4 axb4 44. a5 Kf4 45. a6 b3 46. Kxb3 Kxg4 47. a7 Kxh4 48. a8Q h5 49. Qg2 g5 50. Kc4 g4 51. Qh2+ Kg5 52. Kxd4 1-0

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.05"]
[Round "6"]
[White "Goudriaan, Rafael"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1992"]
[BlackElo "2028"]
[PlyCount "107"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 Rb8 12. Nc2 Bg5 13. b3 0-0 14. a4 Be6 15. axb5 axb5 16. h4 Bh6 17. g4 Bf4 18. Ra6 Bxd5 19. Qxd5 Ne7 20. Qd3 d5 21. Nb4 dxe4 22. Qxd8 Rfxd8 23. Ra2 Ra8 24. Rxa8 Rxa8 25. Rh3 Ra1+ 26. Ke2 Rb1 27. Bg2 Rb2+ 28. Ke1 e3 29. Nd3 exf2+ 30. Nxf2 Rxb3 31. Rd3 g6 32. Ne4 f5 33. Nf6+ Kg7 34. g5 e4 35. Rd7 Kf7 36. Bf1 Bg3+ 37. Ke2 Bxh4 38. Nxh7 Rxc3 39. Kd2 Rc5 40. Ke3 Ke6 41. Nf8+ Kf7 42. Nh7 Rc3+ 43. Kd4 Rc1 44. Be2 Re1 45. Ke3 f4+ 46. Kd2 Rg1 47. Bxb5 Bxg5 48. Bc4+ Ke8 49. Bb5 Bh4 50. Rd4+ Kf7 51. Rxe4 g5 52. Bc4+ Ke8 53. Nf6+ Kf8 54. Nd7+ 1/2-1/2

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.04"]
[Round "5"]
[White "Groen, Jari"]
[Black "Van Kuijk, Vadim"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2028"]
[BlackElo "1968"]
[PlyCount "60"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 Qb6 7. Nc3 Nc6 8. 0-0 Qxb2 9. Qe1 cxd4 10. Bxd4 Nxd4 11. Nxd4 Bb4 12. Ndb5 Ba5 13. Rb1 Qxc2 14. Rc1 Qb2 15. g4 Bg6 16. f4 Ne7 17. Nd6+ Kf8 18. f5 exf5 19. gxf5 Nxf5 20. Nxf5 Rc8 21. Nxd5 Qxc1 22. Qxa5 Qc5+ 23. Qxc5+ Rxc5 24. Nfe3 Be4 25. e6 Bxd5 26. Nxd5 Rxd5 27. Rxf7+ Ke8 28. Rxb7 Rg5+ 29. Kh1 Rf8 30. Bb5+ Rxb5 1/2-1/2

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.03"]
[Round "4"]
[White "Boeren, Jurriaan"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "1979"]
[BlackElo "2028"]
[PlyCount "83"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. c3 Ngf6 5. Qe2 e5 6. d4 Qc7 7. 0-0 Be7 8. d5 0-0 9. a4 a6 10. Bd3 Re8 11. Nbd2 Nf8 12. h3 Ng6 13. Nc4 Bd8 14. Nh2 Rb8 15. a5 Qe7 16. Re1 Bd7 17. Bg5 h6 18. Be3 Bb5 19. Nd2 Bd7 20. Nhf1 Nh7 21. Ng3 Qf6 22. Nc4 Bc7 23. b4 cxb4 24. cxb4 Nf4 25. Bxf4 Qxf4 26. Bc2 Bb5 27. Ba4 Bxa4 28. Rxa4 g6 29. Ra3 Qf6 30. Rc3 Rec8 31. Qg4 Bd8 32. Rec1 b5 33. axb6 Bxb6 34. Nxb6 Rxc3 35. Rxc3 Rxb6 36. Rc8+ Nf8 37. Nf5 h5 38. Qg3 Rxb4 39. Nh6+ Kg7 40. Nf5+ Kg8 41. Nh6+ Kg7 42. Nf5+ 1/2-1/2

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.02"]
[Round "3"]
[White "Groen, Jari"]
[Black "Bon, Gijs"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2028"]
[BlackElo "1805"]
[PlyCount "136"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 Qb6 7. Nc3 Qxb2 8. Qb1 Qxb1+ 9. Rxb1 b6 10. dxc5 bxc5 11. Rb7 d4 12. Bxd4 cxd4 13. Nxd4 Bc5 14. Nxf5 exf5 15. Nd5 Bb6 16. Rxb6 axb6 17. Nc7+ Ke7 18. Nxa8 Nd7 19. Kd2 Nh6 20. Nc7 Rc8 21. Nd5+ Ke6 22. c4 Kxe5 23. Rb1 Rb8 24. Rb5 Kd6 25. h3 Ng8 26. Kc3 g6 27. a4 Ne7 28. Nxb6 Nxb6 29. c5+ Kc7 30. cxb6+ Rxb6 31. Bf3 Rxb5 32. axb5 Nc8 33. Kd4 Kd6 34. Bd5 f6 35. Bg8 h6 36. Bf7 g5 37. g3 Ne7 38. Bc4 h5 39. Bd3 h4 40. gxh4 gxh4 41. Kc4 f4 42. Kd4 Nd5 43. Bc4 Nb6 44. Bg8 Nc8 45. Bf7 Ne7 46. Ke4 Kc5 47. Be8 Nd5 48. Bc6 Nc3+ 49. Kxf4 Nd1 50. Kf3 Kd6 51. Ke2 Nc3+ 52. Kd2 Na4 53. Kd3 Ke5 54. Ke3 Kf5 55. Kf3 Nb6 56. Ke3 Ke5 57. f4+ Kf5 58. Be4+ Ke6 59. f5+ Ke5 60. Kf3 Nc4 61. Bd3 Nd6 62. b6 Kd5 63. Be4+ Ke5 64. Bd3 Kd4 65. Ba6 Ke5 66. Kg4 Ke4 67. b7 Nxb7 68. Bxb7+ Kd4 1-0

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.05.01"]
[Round "2"]
[White "Alvares, Thomas"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "1825"]
[BlackElo "2028"]
[PlyCount "41"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. g4 h6 11. Bxf6 Bxf6 12. h4 Nb6 13. g5 Bxd4 14. Rxd4 Qc5 15. Qd3 hxg5 16. b4 Qc7 17. fxg5 Bd7 18. Rxd6 Nc8 19. Rd4 Nb6 20. Rd6 Nc8 21. Rd4 1/2-1/2

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2023.04.30"]
[Round "1"]
[White "Groen, Jari"]
[Black "Smid, Jelle"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "2028"]
[BlackElo "1776"]
[PlyCount "72"]
[EventDate "2023.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Be7 8. Qd2 0-0 9. 0-0-0 c4 10. f5 b5 11. fxe6 fxe6 12. Ne2 b4 13. Bg5 c3 14. Qe3 Rxf3 15. gxf3 Bxg5 16. f4 cxb2+ 17. Kxb2 Nb6 18. Nc1 Na5 19. Qg3 Na4+ 20. Ka1 Qc7 21. c4 Bh6 22. c5 Nc3 23. Re1 Nc6 24. Qe3 Qf7 25. Nd3 a5 26. Be2 Nxe2 27. Rxe2 Ba6 28. Rf2 Rb8 29. Nb2 Bb5 30. Rg1 a4 31. Kb1 Qf5+ 32. Kc1 a3 33. Nd1 Ba4 34. Qd2 b3 35. axb3 Rxb3 36. Qa2 Bxf4+ 0-1

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.13"]
[Round "9"]
[White "Groen, Jari"]
[Black "Lacrosse, Marc"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "1800"]
[BlackElo "2023"]
[PlyCount "90"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. d4 Be7 7. Re1 b5 8. Rxe4 d5 9. Nxe5 Nxe5 10. Rxe5 bxa4 11. Qe2 Be6 12. f4 Kf8 13. f5 Bd7 14. b3 Bd6 15. Rxd5 Bc6 16. Rxd6 cxd6 17. Ba3 Qf6 18. Qe5 Rd8 19. Nc3 Qg5 20. d5 Kg8 21. Bxd6 Re8 22. Qd4 Bd7 23. Nxa4 h5 24. Qf4 Qf6 25. Rf1 Rh6 26. Ba3 Bxa4 27. Qxa4 Re2 28. Qc4 Qe5 29. Bb2 Qe3+ 30. Kh1 Qd2 31. Qd4 Qxd4 32. Bxd4 Rxc2 33. Be3 Rd6 34. Rd1 Rxa2 35. Bc5 Rd7 36. d6 Rc2 37. b4 a5 38. h3 axb4 39. Bxb4 Rc4 40. Ba3 Ra4 41. Rd3 f6 42. Kh2 Kf7 43. Kg3 g5 44. fxg6+ Kxg6 45. Kf3 Rxa3 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.12"]
[Round "8"]
[White "Krause, Thomas2222"]
[Black "Groen, Jari"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "2129"]
[BlackElo "1800"]
[PlyCount "45"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. Nf3 e6 2. c4 d5 3. d4 c5 4. cxd5 exd5 5. Nc3 Nc6 6. e3 Nf6 7. Bb5 Bd6 8. dxc5 Bxc5 9. 0-0 0-0 10. b3 Bg4 11. h3 Bh5 12. Bb2 Rc8 13. Rc1 a6 14. Be2 Ba7 15. Nd4 Nxd4 16. Bxh5 Nf5 17. Qf3 Nxe3 18. fxe3 Nxh5 19. Nxd5 Rxc1 20. Rxc1 g6 21. g4 Ng7 22. Rc8 Qh4 23. Nf6+ 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.11"]
[Round "7"]
[White "Groen, Jari"]
[Black "Boulahfa, Hicham"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "1800"]
[BlackElo "2032"]
[PlyCount "135"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Nc6 7. Nxc6 bxc6 8. e5 Ng8 9. Qg4 f6 10. Bd3 Qa5 11. Bxh7 Qxe5+ 12. Be3 Ne7 13. Bg6+ Kd8 14. 0-0-0 Nxg6 15. Qxg6 Qh5 16. Qe4 Bc5 17. Qxc6 Bxe3+ 18. fxe3 Rb8 19. Qxe6 Qc5 20. Qd5 Qxe3+ 21. Kc2 Qb6 22. b3 Re8 23. Rd2 Qc7 24. Rhd1 Qxh2 25. Qf7 Qh7+ 26. Kb2 Re7 27. Qf8+ Re8 28. Qf7 Re7 29. Qf8+ Re8 30. Qd6 Rb7 31. Na4 Qf5 32. Nc5 Rc7 33. Nxa6 Bxa6 34. Qxa6 Qe5+ 35. Kb1 Qe4+ 36. Kc1 Qe3 37. Qa8+ Ke7 38. Qd5 Rec8 39. Qd4 Qg5 40. Kb2 Qe5 41. Kc3 Qa5+ 42. Kd3 Rc6 43. Ke2 R8c7 44. Qd5 Qc3 45. Kf2 Re6 46. Re2 Rxe2+ 47. Kxe2 Qg3 48. Qf3 Qg6 49. Kf2 Rc6 50. Qd5 Qe8 51. Re1+ Re6 52. Qc5+ Kd8 53. Qa5+ Ke7 54. Rxe6+ dxe6 55. Qc7+ Kf8 56. Qd6+ Kf7 57. a4 e5 58. a5 Qh8 59. Qd5+ Kg6 60. Qe4+ Kf7 61. a6 Qh6 62. Qd5+ Kg6 63. a7 Qf4+ 64. Ke2 e4 65. a8Q Qg4+ 66. Ke3 Qg3+ 67. Kxe4 Qe1+ 68. Kd4 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.09"]
[Round "5"]
[White "Groen, Jari"]
[Black "De Boer, Robert"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "1800"]
[BlackElo "2005"]
[PlyCount "57"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Be7 8. Qd2 cxd4 9. Nxd4 Nxd4 10. Bxd4 Nb8 11. 0-0-0 Nc6 12. Bf2 Bd7 13. Ne2 Rc8 14. Nd4 Nxd4 15. Bxd4 Bc5 16. h4 h5 17. Rh3 g6 18. Qf2 Qe7 19. Be2 Bxd4 20. Qxd4 Qc5 21. Rc3 Qxd4 22. Rxc8+ Bxc8 23. Rxd4 Bd7 24. Kd2 Ke7 25. Rb4 Rb8 26. c4 dxc4 27. Rxc4 Bc6 28. Bf3 Bxf3 29. gxf3 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.08"]
[Round "4"]
[White "Kools, Thomas"]
[Black "Groen, Jari"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "2135"]
[BlackElo "1800"]
[PlyCount "47"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. f4 e6 7. Nf3 Nge7 8. 0-0 0-0 9. Be3 Rb8 10. Nh4 f5 11. exf5 exf5 12. Nf3 Nd4 13. Bf2 Nec6 14. Re1 b5 15. Nxd4 Nxd4 16. Nd5 Re8 17. Rxe8+ Qxe8 18. c3 Nc6 19. Qb3 Kh8 20. Re1 Qf7 21. Nf6 c4 22. dxc4 Na5 23. Qb4 bxc4 24. Qxb8 1-0

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.07"]
[Round "3"]
[White "Groen, Jari"]
[Black "Manukonda, Arun"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1800"]
[BlackElo "2031"]
[PlyCount "61"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c3 Bg5 12. Nc2 0-0 13. a4 bxa4 14. Rxa4 a5 15. Bc4 Kh8 16. Nce3 Bxe3 17. Nxe3 Ne7 18. b3 Bb7 19. Nd5 f5 20. Nxe7 Qxe7 21. Bd5 fxe4 22. Rxe4 Qc7 23. c4 Qc5 24. 0-0 Bxd5 25. cxd5 Rfb8 26. Rc4 Qa3 27. Qc2 h6 28. h3 Rxb3 29. Rc8+ Rxc8 30. Qxc8+ Kh7 31. Qf5+ 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.07"]
[Round "2"]
[White "Honkoop, Gilian"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "2184"]
[BlackElo "1800"]
[PlyCount "177"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. g3 c5 5. cxd5 exd5 6. Bg2 Nc6 7. 0-0 Bd6 8. Nc3 h6 9. b3 0-0 10. Bb2 Bf5 11. Rc1 Qa5 12. dxc5 Bxc5 13. a3 Qd8 14. b4 Bb6 15. Na4 Ne4 16. Nxb6 axb6 17. Qb3 Be6 18. Rfd1 b5 19. Nd4 Nxd4 20. Rxd4 Rc8 21. Rcd1 Qb6 22. Qe3 Nf6 23. Qd2 Qc6 24. Rh4 Qc2 25. Qxc2 Rxc2 26. Bxf6 gxf6 27. Bxd5 Rxe2 28. Bxe6 fxe6 29. Rg4+ Kh8 30. Rd7 Rg8 31. Rxg8+ Kxg8 32. Rxb7 Ra2 33. Rxb5 Rxa3 34. Rb7 Rb3 35. b5 e5 36. b6 Rb1+ 37. Kg2 Rb4 38. Rb8+ Kg7 39. b7 Kh7 40. Kf3 Kg7 41. h4 Rb1 42. h5 Rb4 43. g4 Rf4+ 44. Ke3 Rb4 45. Kd3 Rb1 46. Kc4 Rc1+ 47. Kd5 Rb1 48. Ke6 Rb6+ 49. Ke7 e4 50. Kd7 Rb1 51. Kc6 Rc1+ 52. Kd5 Rb1 53. Kxe4 Rb2 54. Kd4 Rb1 55. f4 Rd1+ 56. Ke4 Rb1 57. Kd5 Rb2 58. Kd6 Rd2+ 59. Ke6 Re2+ 60. Kf5 Rb2 61. g5 Rb5+ 62. Ke4 hxg5 63. h6+ Kh7 64. f5 Re5+ 65. Kd4 Rb5 66. Rf8 Rxb7 67. Rxf6 g4 68. Ke3 Rb4 69. Rg6 g3 70. Kf3 g2 71. Kxg2 Rf4 72. Rf6 Rh4 73. Kg3 Rxh6 74. Rf7+ Kg8 75. Ra7 Kf8 76. Kg4 Rb6 77. Kg5 Rc6 78. Rh7 Ra6 79. Rb7 Rc6 80. Ra7 Rb6 81. Ra5 Rc6 82. Ra4 Rb6 83. Rg4 Kf7 84. Kh5 Ra6 85. Kg5 Rb6 86. Rc4 Ra6 87. Rc7+ Kf8 88. f6 Ra1 89. Kf5 1/2-1/2

[Event "Vlissingen HZ op 24th"]
[Site "Vlissingen"]
[Date "2022.08.06"]
[Round "1"]
[White "Groen, Jari"]
[Black "Weber, Dirk"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "1800"]
[BlackElo "2208"]
[PlyCount "123"]
[EventDate "2022.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 Bc5 8. 0-0 b5 9. h3 Qb6 10. e5 Bxd4 11. exf6 gxf6 12. Qf3 Nc6 13. Bxd4 Qxd4 14. Rad1 Qh4 15. Rfe1 Kf8 16. g3 Qh6 17. Bf1 d5 18. Nxd5 Ne5 19. Rxe5 fxe5 20. Nf6 e4 21. Qxe4 Qxf6 22. Qxa8 Kg7 23. c3 e5 24. Qe4 Bf5 25. Qe3 h5 26. h4 Bg6 27. Rd5 Re8 28. Bg2 Qf5 29. Kh2 Qf6 30. a3 Re6 31. Bh3 Re7 32. Rd2 Qc6 33. Bg2 Qc4 34. Kg1 Qa2 35. Qe1 e4 36. Qe3 Qc4 37. Qd4+ Qxd4 38. Rxd4 e3 39. fxe3 Rxe3 40. Kf2 Re6 41. Bd5 Rf6+ 42. Kg2 Bf5 43. Bf3 Bg6 44. a4 Re6 45. Kf2 bxa4 46. Rxa4 Rb6 47. Rb4 Rd6 48. Rd4 Rb6 49. b4 Kh6 50. Be2 Rf6+ 51. Rf4 Rd6 52. c4 Rd2 53. Ke3 Rb2 54. c5 Rb3+ 55. Kf2 Rb2 56. Rd4 Bf5 57. Ke3 Bc8 58. Bf3 Be6 59. Kf4 Kg6 60. Ke5 Rb3 61. Bd5 Rxg3 62. Bxe6 1-0

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.07"]
[Round "7"]
[White "Groen, Jari"]
[Black "Van der Hagen, Loek"]
[Result "0-1"]
[ECO "B20"]
[WhiteElo "1750"]
[BlackElo "2071"]
[PlyCount "74"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Ne2 Qb6 4. Nbc3 g6 5. d3 Bg7 6. g3 d6 7. Bg2 Nf6 8. 0-0 0-0 9. f4 Bg4 10. h3 Bxe2 11. Nxe2 Ne8 12. Rb1 Nc7 13. Be3 Qa5 14. a3 Ne6 15. f5 Ned4 16. g4 Nxe2+ 17. Qxe2 Bd4 18. g5 Rab8 19. f6 b5 20. Bxd4 Nxd4 21. Qf2 exf6 22. gxf6 bxc4 23. dxc4 Rb3 24. Rbd1 h5 25. Qh4 Kh7 26. e5 dxe5 27. Be4 Kh6 28. Kh1 g5 29. Qf2 Rxh3+ 30. Kg2 Rh4 31. Rxd4 exd4 32. Qf5 Rxe4 33. Qxe4 Qd2+ 34. Rf2 Qe3 35. Qb7 g4 36. Qxa7 Re8 37. Qxf7 Qh3+ 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.06"]
[Round "6"]
[White "De Rooij, Kevin"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "B27"]
[WhiteElo "1584"]
[BlackElo "1750"]
[PlyCount "130"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 e6 2. e4 d5 3. cxd5 exd5 4. exd5 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. Bb5+ Nbd7 8. Qe2+ Qe7 9. Qxe7+ Kxe7 10. 0-0 Rd8 11. d6+ cxd6 12. d4 Nb6 13. Bg5 h6 14. Rfe1+ Kf8 15. Bf4 Bg4 16. Nd2 Nfd5 17. Nxd5 Nxd5 18. Be3 Nxe3 19. fxe3 Rac8 20. Rac1 Bf5 21. Nb3 Rxc1 22. Rxc1 Rc8 23. Rc3 Rxc3 24. bxc3 b6 25. Nd2 Ke7 26. Kf2 d5 27. h3 g5 28. g4 Bg6 29. Ke2 Ke6 30. Kf3 Bf8 31. c4 Bb4 32. cxd5+ Kd6 33. Ne4+ Kxd5 34. Nf6+ Ke6 35. Ne8 Bf8 36. Bc4+ Kd7 37. Nf6+ Ke7 38. Ne4 Bg7 39. Ng3 Bf8 40. e4 f6 41. Nf5+ Bxf5 42. gxf5 h5 43. e5 Bh6 44. Ke4 g4 45. hxg4 hxg4 46. Kd5 g3 47. Bf1 Be3 48. Bg2 Bf2 49. Kc4 Be3 50. e6 Kd6 51. a4 Bf2 52. d5 Be3 53. Kb5 Bc5 54. Bh1 Kc7 55. Ka6 Kb8 56. Bf3 Ba3 57. Kb5 Kc7 58. Bg2 Bd6 59. Kc4 Ba3 60. Kd4 Bc5+ 61. Ke4 Kd6 62. Kf4 Bf2 63. Kg4 Ke7 64. Kh5 Bc5 65. Kg6 Ba3 1/2-1/2

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.05"]
[Round "5"]
[White "Groen, Jari"]
[Black "Niemeijer, Leon"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "1750"]
[BlackElo "1693"]
[PlyCount "45"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8. Nxd4 Qb6 9. a3 Bc5 10. Ncb5 0-0 11. b4 Bxd4 12. Nxd4 Nxd4 13. Bxd4 Qc7 14. Bd3 f5 15. exf6 Nxf6 16. 0-0 Ne4 17. Qh5 Bd7 18. Rae1 Rxf4 19. Rxf4 Qxf4 20. Bxe4 dxe4 21. Rf1 g6 22. Qc5 Qh4 23. Qe5 1-0

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.04"]
[Round "4"]
[White "Bakija, Alan"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "1868"]
[BlackElo "1750"]
[PlyCount "111"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 e6 2. c4 d5 3. e3 Nf6 4. b3 c5 5. cxd5 exd5 6. d4 a6 7. Bb2 Nc6 8. Nc3 Be7 9. a3 0-0 10. dxc5 Bxc5 11. Ne2 Bg4 12. Ned4 Ne4 13. Be2 Qa5+ 14. Kf1 Bd6 15. Nxc6 bxc6 16. b4 Qc7 17. Rc1 Bd7 18. Qd4 f6 19. h3 Qb7 20. g4 Rae8 21. Ba1 Be5 22. Qd3 Bc8 23. Kg2 Qd7 24. Nd2 Bxa1 25. Rxa1 f5 26. f3 Nxd2 27. Qxd2 Qe7 28. Kf2 fxg4 29. hxg4 Bxg4 30. Rag1 Qe4 31. f4 Bxe2 32. Kxe2 d4 33. Qa2+ Rf7 34. Rh3 dxe3 35. Rhg3 g6 36. Rf3 Kf8 37. Rgg3 Qd5 38. Qb2 Qc4+ 39. Ke1 Kg8 40. f5 Qd5 41. fxg6 Qd2+ 42. Qxd2 exd2+ 43. Kxd2 Rxf3 44. gxh7+ Kxh7 45. Rxf3 Kg6 46. Kc3 Re5 47. Kb3 c5 48. Ka4 cxb4 49. Kxb4 Rd5 50. Rc3 Kf7 51. Rc6 a5+ 52. Ka4 Ke7 53. Ra6 Kd7 54. Rxa5 Rxa5+ 55. Kxa5 Kc8 56. Ka6 1/2-1/2

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.03"]
[Round "3"]
[White "Van Egmond, Tom"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "1672"]
[BlackElo "1750"]
[PlyCount "84"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. Bxc6 bxc6 5. d3 Ne7 6. h4 d6 7. h5 e5 8. Nbd2 Bg4 9. Nc4 Qd7 10. a3 Ng8 11. b4 cxb4 12. axb4 Qc7 13. Ne3 Be6 14. Ng5 Nf6 15. Nxe6 fxe6 16. Ng4 Be7 17. c4 0-0 18. Nxf6+ Bxf6 19. Be3 a6 20. 0-0 Rfb8 21. Qa4 Qb7 22. Rfb1 Be7 23. Bd2 d5 24. c5 Qb5 25. Qxb5 axb5 26. exd5 exd5 27. f3 Kf7 28. Bc3 Bf6 29. Re1 Re8 30. g4 Bg5 31. Rxa8 Rxa8 32. Rxe5 Bf6 33. Rf5 Ke6 34. Bxf6 gxf6 35. Kf2 Ra1 36. Ke3 h6 37. Kd2 Ra3 38. Kc2 Ra1 39. Kd2 Rb1 40. Rf4 Ke5 41. Rf5+ Ke6 42. Rf4 Ke5 1/2-1/2

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.02"]
[Round "2"]
[White "Groen, Jari"]
[Black "Slagboom, Leandro"]
[Result "0-1"]
[ECO "B99"]
[WhiteElo "1750"]
[BlackElo "1997"]
[PlyCount "64"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. Bd3 Nbd7 10. 0-0-0 h6 11. Bh4 g5 12. fxg5 Ne5 13. Qe2 Nfg4 14. h3 hxg5 15. Bg3 Nf6 16. Nf3 Nh5 17. Qf2 Nxg3 18. Qxg3 Qc5 19. Nxe5 dxe5 20. Rhf1 b5 21. Qf3 Rf8 22. Be2 Bd7 23. Rd3 Rc8 24. Rfd1 g4 25. Qxg4 b4 26. Rxd7 bxc3 27. R7d3 cxb2+ 28. Kxb2 Qxc2+ 29. Ka1 Rb8 30. Rb3 Rxb3 31. axb3 Bb4 32. Rd3 Ba3 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2022.05.01"]
[Round "1"]
[White "Groen, Jari"]
[Black "Smid, Jelle"]
[Result "1-0"]
[ECO "C10"]
[WhiteElo "1750"]
[BlackElo "1450"]
[PlyCount "129"]
[EventDate "2022.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nc6 4. e5 f6 5. Bd3 Qe7 6. Nf3 Qf7 7. Bf4 f5 8. 0-0 h6 9. h4 g6 10. Ne2 Nb4 11. c4 Bd7 12. Nc3 Ne7 13. Rc1 Nxd3 14. Qxd3 Bc6 15. b3 Qh7 16. Bd2 g5 17. Rfd1 gxh4 18. Nxh4 Rd8 19. Bf4 Rg8 20. c5 Rg4 21. g3 Ng6 22. Nxg6 Rxg6 23. Kf1 Be7 24. Ke1 h5 25. Kd2 Kf7 26. Rh1 h4 27. gxh4 Rg4 28. Ne2 a6 29. a4 Rxh4 30. Rxh4 Qxh4 31. Qg3 Rh8 32. Rg1 Qxg3 33. Nxg3 Rh4 34. Ne2 Be8 35. Ke3 Kf8 36. Bg5 Rh3+ 37. f3 Bxg5+ 38. Rxg5 Rh1 39. Kd2 b5 40. cxb6 cxb6 41. Nf4 Bf7 42. Rg3 Rh2+ 43. Kc3 Rh8 44. Rh3 Rxh3 45. Nxh3 Ke7 46. Kb4 Kd7 47. a5 Kc6 48. Ng5 Bg8 49. Ka4 Kb7 50. Nh3 Bf7 51. Nf4 Be8+ 52. Kb4 Bd7 53. Ng6 Kc7 54. Nf8 Bc8 55. Ka4 Kb7 56. axb6 Kxb6 57. b4 Kb7 58. Ka5 Ka7 59. b5 axb5 60. Kxb5 Kb7 61. Kc5 Kc7 62. f4 Bd7 63. Nxd7 Kxd7 64. Kb6 Ke8 65. Kc6 1-0

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.07"]
[Round "7"]
[White "Van Kuijk, Vadim"]
[Black "Groen, Jari"]
[Result "1-0"]
[ECO "E02"]
[WhiteElo "1722"]
[BlackElo "1423"]
[PlyCount "85"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nc3 Be7 5. Bg2 0-0 6. Nf3 dxc4 7. Qa4 Bd7 8. Qxc4 Bc6 9. 0-0 Nbd7 10. Re1 Nb6 11. Qd3 Nfd5 12. e4 Nxc3 13. bxc3 a6 14. h4 Bb5 15. Qb1 c5 16. e5 Bc6 17. Ng5 Bxg5 18. Bxg5 Qc7 19. Bxc6 Qxc6 20. Re4 Nd5 21. Qd3 c4 22. Qc2 Nxc3 23. Rf4 Nd5 24. Kh2 Nxf4 25. gxf4 f6 26. exf6 gxf6 27. Bh6 Rf7 28. Rg1+ Kh8 29. Qc3 Rg8 30. Rxg8+ Kxg8 31. Qg3+ Kh8 32. f5 Qe8 33. fxe6 Re7 34. d5 Qg8 35. Qxg8+ Kxg8 36. Kg3 b5 37. Kf4 Rg7 38. Bxg7 Kxg7 39. d6 Kf8 40. Kf5 c3 41. Kxf6 Ke8 42. e7 c2 43. Ke6 1-0

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.06"]
[Round "6"]
[White "Groen, Jari"]
[Black "Pham, Khoi"]
[Result "0-1"]
[ECO "B94"]
[WhiteElo "1423"]
[BlackElo "2128"]
[PlyCount "44"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. f4 Qc7 8. Qf3 h6 9. Bxf6 Nxf6 10. f5 Qc5 11. 0-0-0 g5 12. e5 Qxe5 13. g3 g4 14. Qf2 h5 15. Re1 Qc5 16. Bg2 Bg7 17. Rd1 0-0 18. Rhe1 Re8 19. Kb1 Bd7 20. Bxb7 Rab8 21. Qg2 Qb6 22. Nc6 Rxb7 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.05"]
[Round "5"]
[White "Groen, Jari"]
[Black "Aarts, Joaquin"]
[Result "1-0"]
[ECO "B94"]
[WhiteElo "1423"]
[BlackElo "1736"]
[PlyCount "53"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e5 7. Nf5 Bxf5 8. exf5 Be7 9. Bxf6 Bxf6 10. Bc4 Qc7 11. Ne4 Be7 12. Qg4 Qc6 13. Rd1 Nd7 14. Bd5 Qb6 15. Qxg7 0-0-0 16. f6 Rhg8 17. Qxf7 Bxf6 18. Nxf6 Nxf6 19. Qxf6 Rdf8 20. Qe6+ Kb8 21. 0-0 Rg6 22. Qh3 Rgf6 23. Qe3 Qc7 24. c4 Rf4 25. g3 R4f6 26. Rd3 Qg7 27. Rb3 1-0

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.04"]
[Round "4"]
[White "Wierenga, Jael"]
[Black "Groen, Jari"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1565"]
[BlackElo "1423"]
[PlyCount "60"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 f5 2. Bf4 Nf6 3. e3 e6 4. Nf3 b6 5. Be2 Bb7 6. h3 Bd6 7. Ne5 0-0 8. Rg1 Nc6 9. Bf3 Ne4 10. Nd2 Ne7 11. Ndc4 Bxe5 12. Nxe5 d6 13. Nd3 c5 14. c3 c4 15. Nc1 Qc7 16. Ne2 e5 17. Bh2 Rad8 18. Qc2 Ng6 19. g4 Nxf2 20. Bxb7 Nd3+ 21. Kd2 Qxb7 22. b3 b5 23. bxc4 bxc4 24. Qa4 Qb2+ 25. Qc2 Qxc2+ 26. Kxc2 fxg4 27. Kd2 Nh4 28. Kd1 Nf3 29. Rh1 Nxh2 30. Rxh2 Rf1+ 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.03"]
[Round "3"]
[White "Groen, Jari"]
[Black "Achuthan, Dylan"]
[Result "0-1"]
[ECO "B02"]
[WhiteElo "1423"]
[BlackElo "1888"]
[PlyCount "72"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. g3 d6 4. exd6 Qxd6 5. Bg2 Nc6 6. d4 Ndb4 7. a3 Nxc2+ 8. Qxc2 Nxd4 9. Qd3 Bf5 10. Be4 Bxe4 11. Qxe4 f5 12. Qd3 Qc6 13. Qxd4 Rd8 14. Qe3 Qxh1 15. f4 g6 16. Qxa7 Bg7 17. Qa4+ c6 18. Be3 0-0 19. Nd2 Qxh2 20. Qc4+ Kh8 21. 0-0-0 Qxg3 22. Ngf3 Rxd2 23. Bxd2 Qxf3 24. Qb4 c5 25. Qxc5 Qb3 26. Bc3 Bxc3 27. bxc3 Qe6 28. a4 Rc8 29. Qb4 Qe3+ 30. Kc2 b6 31. Rd5 Qe2+ 32. Kb3 Qe6 33. Qd4+ Kg8 34. Kb4 Qe1 35. Qxb6 Qxc3+ 36. Kb5 Qc4+ 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.02"]
[Round "2"]
[White "Arnold, Lorin"]
[Black "Groen, Jari"]
[Result "0-1"]
[ECO "A03"]
[WhiteElo "1651"]
[BlackElo "1423"]
[PlyCount "96"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. f4 c5 2. Nf3 Nc6 3. b3 d5 4. Bb2 Nf6 5. e3 a6 6. d4 e6 7. Be2 Bd6 8. 0-0 0-0 9. Ne5 Ne7 10. Nd2 Nf5 11. Rf3 cxd4 12. exd4 Be7 13. c3 Nd6 14. Bd3 Nfe4 15. Rh3 f5 16. Ndf3 Bd7 17. Nxd7 Qxd7 18. Ne5 Qe8 19. Rc1 Nf7 20. g4 Nxe5 21. fxe5 Nf2 22. Kxf2 fxg4+ 23. Ke1 gxh3 24. Qg4 Qf7 25. Rc2 Rac8 26. Qxh3 h6 27. Rg2 Bg5 28. Rxg5 Qf2+ 29. Kd1 hxg5 30. Qh7+ Kf7 31. Bg6+ Ke7 32. Ba3+ Kd8 33. Bd3 Rf7 34. Bc5 Rxc5 35. dxc5 Qxc5 36. Qg6 Qg1+ 37. Kd2 Qxh2+ 38. Be2 Qf4+ 39. Kd1 Ke7 40. c4 Qxe5 41. cxd5 Qxd5+ 42. Ke1 Qf5 43. Qh5 Qf2+ 44. Kd2 Qf4+ 45. Kd1 Rf8 46. Qg6 Rd8+ 47. Ke1 Qg3+ 48. Kf1 Rf8+ 0-1

[Event "NED-ch U16"]
[Site "Almelo"]
[Date "2021.08.01"]
[Round "1"]
[White "Groen, Jari"]
[Black "Shadrin, Mitia"]
[Result "0-1"]
[ECO "B36"]
[WhiteElo "1423"]
[BlackElo "1698"]
[PlyCount "108"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 Nxd4 7. Qxd4 d6 8. Be2 Bg7 9. Be3 0-0 10. Qd2 Qa5 11. 0-0 Be6 12. f3 Rfc8 13. Nd5 Qxd2 14. Bxd2 Nxd5 15. exd5 Bd7 16. Kh1 b5 17. Rac1 bxc4 18. Rxc4 Rxc4 19. Bxc4 Bxb2 20. Rb1 Bf6 21. Rb7 Bc8 22. Rb3 Bd4 23. Be3 Bxe3 24. Rxe3 Rb8 25. Kg1 Kf8 26. Kf2 Rb2+ 27. Re2 Rxe2+ 28. Kxe2 Ke8 29. Kd3 Kd8 30. Kd4 Kc7 31. f4 Kb6 32. Bb3 Bd7 33. h3 Ka5 34. a3 Ba4 35. Bc4 Bb5 36. Bb3 Bf1 37. h4 Bxg2 38. Ke3 Kb5 39. Kd4 Bf1 40. Bc2 Bc4 41. f5 Ba2 42. fxg6 hxg6 43. Bd1 Bb1 44. Ke3 Kc5 45. Bb3 a5 46. Kf4 f6 47. Ke3 Bf5 48. Kf4 Bd3 49. Bd1 Kxd5 50. h5 gxh5 51. Bxh5 Kd4 52. Bd1 e5+ 53. Kf3 f5 54. Kf2 e4 0-1

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.10"]
[Round "9"]
[White "Alvares, Thomas"]
[Black "Groen, Jari"]
[Result "0-1"]
[ECO "B33"]
[WhiteElo "1408"]
[BlackElo "1349"]
[PlyCount "80"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd2 d6 8. Bc4 0-0 9. Bg5 Bxc3+ 10. bxc3 Qc7 11. Qd3 a6 12. 0-0 Be6 13. Bb3 Rac8 14. Rfd1 Rfd8 15. Rab1 Na5 16. Bh4 Rd7 17. Bxe6 fxe6 18. Ng5 Qxc3 19. Qe2 Qxc2 20. Qf3 Rc3 21. Qxc3 Qxc3 22. Rbc1 Qxc1 23. Rxc1 Nc6 24. f3 h6 25. Nh3 d5 26. exd5 exd5 27. Nf2 g5 28. Bg3 Nh5 29. Ng4 Nxg3 30. Rxc6 bxc6 31. Nf6+ Kf7 32. Nxd7 Ne2+ 33. Kf2 Ke6 34. Nc5+ Kd6 35. Nxa6 Nc3 36. a3 c5 37. Ke3 c4 38. Nb4 d4+ 39. Kf2 Nd5 40. Nc2 d3 0-1

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.09"]
[Round "8"]
[White "Groen, Jari"]
[Black "De Jong, Mats"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1349"]
[BlackElo "1356"]
[PlyCount "67"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 0-0 8. 0-0 Bxd4 9. Bxd4 Nxd4 10. Qxd4 Qg6 11. Nd2 d6 12. f4 Nc6 13. Qe3 Qf6 14. Rae1 Be6 15. Rf3 Na5 16. Bd3 Nc6 17. e5 dxe5 18. fxe5 Qe7 19. Rg3 Kh8 20. Qe4 g6 21. Qf4 Rae8 22. Rge3 Qc5 23. Ne4 Qxe5 24. Qh6 Qg7 25. Qxg7+ Kxg7 26. Nc5 b6 27. Nxe6+ Rxe6 28. Rxe6 fxe6 29. Rxe6 Rf6 30. Re2 Nd8 31. Bc4 Kf8 32. Rd2 Ke7 33. g3 Nf7 34. Bxf7 1/2-1/2

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.09"]
[Round "7"]
[White "Groen, Jari"]
[Black "Knol, Daniel"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "1349"]
[BlackElo "1662"]
[PlyCount "90"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Nc6 8. f3 b5 9. a3 Bb7 10. Be2 Be7 11. 0-0 0-0 12. Qd2 Qc7 13. Rfd1 Rad8 14. Nd5 Nxd5 15. exd5 Nb8 16. Rac1 f5 17. c4 bxc4 18. Rxc4 Qd7 19. Na5 Ba8 20. Rdc1 Rc8 21. Qc2 Rxc4 22. Qxc4 f4 23. Bb6 Bd8 24. Bxd8 Qxd8 25. b4 Qb6+ 26. Kf1 Qe3 27. Rc3 Qd2 28. Rd3 Qb2 29. Nc6 Nd7 30. Qxa6 Nf6 31. Ne7+ Kh8 32. Qxd6 e4 33. Ng6+ hxg6 34. Qxf8+ Kh7 35. fxe4 Qc1+ 36. Rd1 Qe3 37. Qc5 Qxe4 38. Bf3 Qf5 39. d6 Bxf3 40. Qxf5 gxf5 41. gxf3 Nd7 42. b5 Kg6 43. b6 Kf6 44. b7 Ke6 45. Re1+ Kd5 1-0

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.08"]
[Round "6"]
[White "De Rooij, Kevin"]
[Black "Groen, Jari"]
[Result "1/2-1/2"]
[ECO "E39"]
[WhiteElo "1480"]
[BlackElo "1349"]
[PlyCount "53"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Nf3 c5 6. dxc5 Na6 7. a3 Bxc3+ 8. Qxc3 Nxc5 9. Bf4 Nce4 10. Qc2 Qe7 11. e3 b6 12. g3 Bb7 13. Bg2 d6 14. 0-0 Rfd8 15. Ng5 Nxg5 16. Bxg5 Bxg2 17. Kxg2 h6 18. Bxf6 Qxf6 19. e4 Rac8 20. Qe2 Qd4 21. Rac1 d5 22. exd5 exd5 23. Rfd1 Qe4+ 24. Qxe4 dxe4 25. Rxd8+ Rxd8 26. c5 bxc5 27. Rxc5 1/2-1/2

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.07"]
[Round "4"]
[White "Ang, Rufus"]
[Black "Groen, Jari"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "1498"]
[BlackElo "1349"]
[PlyCount "105"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 d5 5. Nf3 0-0 6. e3 h6 7. Bh4 b6 8. Qb3 Bxc3+ 9. bxc3 Bb7 10. Be2 Nbd7 11. 0-0 c5 12. Rfd1 Qe7 13. Rac1 Rfd8 14. Ne5 g5 15. Bg3 Ne4 16. Nxd7 Rxd7 17. Be5 Rad8 18. Bf3 Nf6 19. Qa4 Ba8 20. h3 Ne4 21. Bxe4 dxe4 22. Qa3 f6 23. Bg3 Bc6 24. Rd2 b5 25. Qa6 Ba8 26. Qxb5 e5 27. d5 Rb7 28. Qa4 Rb6 29. Qc2 f5 30. Rb1 Rdb8 31. Rxb6 Rxb6 32. f3 f4 33. exf4 exf4 34. Bf2 e3 35. Re2 exf2+ 36. Kxf2 Qf7 37. Qa4 Rf6 38. Re8+ Kg7 39. Rxa8 Kg6 40. Rxa7 Qf8 41. Qc2+ Kh5 42. Kg1 Qb8 43. Ra3 Qe5 44. Qd2 Rb6 45. Rb3 Ra6 46. Rb2 Ra3 47. Rc2 Ra4 48. Qe2 Qf6 49. Kh2 Kg6 50. Qe4+ Kh5 51. Qe8+ Kh4 52. Qxa4 Qe5 53. Rc1 1-0

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2019.08.05"]
[Round "1"]
[White "Groen, Jari"]
[Black "Nielsen, Philip"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1349"]
[BlackElo "1797"]
[PlyCount "124"]
[EventDate "2019.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 b5 7. a3 Bb7 8. f3 Nbd7 9. Be2 Qc7 10. 0-0 g6 11. Qd2 Bg7 12. Rad1 Ne5 13. Bh6 0-0 14. Bxg7 Kxg7 15. Kh1 Rac8 16. Nb3 Nfd7 17. Qd4 Kg8 18. f4 Nc4 19. Bxc4 Qxc4 20. Na5 Qxd4 21. Rxd4 Ba8 22. e5 d5 23. Nxd5 Rxc2 24. Ne3 Re2 25. Rxd7 Rxe3 26. Kg1 Rc8 27. Rfd1 Kg7 28. Rd8 Rxd8 29. Rxd8 Be4 30. Rd2 Re1+ 31. Kf2 Rc1 32. Nb3 Rc4 33. Rd4 Rc2+ 34. Rd2 Rc7 35. Ke3 Bf5 36. Nd4 Bc8 37. Rc2 Rxc2 38. Nxc2 Bb7 39. g3 Kh6 40. Nd4 Kh5 41. f5 Kg4 42. fxg6 hxg6 43. Ne2 Kh3 44. Kf4 Kxh2 45. Kg5 Bf3 46. Nd4 Kxg3 47. e6 Bd5 48. exf7 Bxf7 49. Nc6 Kf2 50. Nb4 Kf3 51. Nxa6 e5 52. Kf6 e4 53. Nb4 Be8 54. Ke5 g5 55. Kd4 g4 56. Nc2 g3 57. Ne1+ Kf2 58. Kxe4 Bc6+ 59. Kf4 Kxe1 60. Kxg3 Kd2 61. b3 Kc3 62. a4 b4 0-1

