[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.05.04"]
[Round "9"]
[White "Corstjens, Rolf"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "1819"]
[PlyCount "79"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Qg4 Kf8 9. h4 c5 10. Bd3 Nxd2 11. Kxd2 Qa5 12. Nf3 Nc6 13. Qf4 Bd7 14. Rhb1 Qc7 15. g4 c4 16. Be2 Ne7 17. h5 Rb8 18. Nh4 b5 19. Qg3 a5 20. a3 Nc6 21. f4 b4 22. a4 Qa7 23. Qe3 Ke7 24. f5 Kd8 25. fxe6 Bxe6 26. Nf5 Bxf5 27. gxf5 Rb7 28. Bf3 Rd7 29. Rg1 Qb6 30. Rab1 f6 31. e6 Rd6 32. Rxg7 bxc3+ 33. Kc1 Nb4 34. Kd1 Qc6 35. Qxc3 Qxa4 36. Ra1 Qb5 37. Qa3 Ra6 38. c3 Nc6 39. Qd6+ Kc8 40. Qc7# 1-0

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.05.03"]
[Round "8"]
[White "De Groot, Jacob"]
[Black "Beerdsen, Thomas"]
[Result "0-1"]
[ECO "B80"]
[BlackElo "2196"]
[PlyCount "60"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Nbd7 7. f3 e6 8. Qd2 b5 9. g4 h6 10. 0-0-0 b4 11. Nce2 Qc7 12. Ng3 d5 13. exd5 Nxd5 14. Ne4 Rb8 15. Bf2 Qa5 16. Bc4 Bb7 17. Bb3 Nc5 18. Nxc5 Bxc5 19. Rhe1 0-0 20. g5 hxg5 21. Qxg5 Be7 22. Qd2 Nc3 23. Rg1 Nxd1 24. Qh6 Qe5 25. Nxe6 Qxb2+ 26. Kxd1 Bxf3+ 27. Ke1 Qa1+ 28. Kd2 Qxg1 29. Bxg1 gxh6 30. Nxf8 Rxf8 0-1

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.05.02"]
[Round "7"]
[White "De Groot, Jacob"]
[Black "Jongste, David"]
[Result "1/2-1/2"]
[ECO "B90"]
[BlackElo "1851"]
[PlyCount "60"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bg5 h6 8. Bh4 g5 9. Bg3 Bg7 10. h3 Ne5 11. Qd2 Nbc6 12. Nb3 Be6 13. 0-0-0 Nc4 14. Bxc4 Bxc4 15. Kb1 Rc8 16. Nd5 Bxd5 17. exd5 Ne5 18. Bxe5 Bxe5 19. g3 Qb6 20. f4 Bf6 21. fxg5 hxg5 22. Rde1 Kf8 23. Re4 Rg8 24. h4 gxh4 25. Qh6+ Bg7 26. Qxh4 Qc7 27. Re2 Rh8 28. Qe4 Rxh1+ 29. Qxh1 Qc4 30. Qf3 Bf6 1/2-1/2

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.05.01"]
[Round "6"]
[White "De Feijter, Bas"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "1880"]
[PlyCount "57"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. Nf3 Bd6 11. Bf4 Qa5+ 12. Bd2 Qc7 13. Rc1 a6 14. Nc3 0-0 15. 0-0 Bd7 16. Re1 Ng4 17. Bxh7+ Kh8 18. Qe2 Bxh2+ 19. Kf1 Qd6 20. Bb1 e5 21. dxe5 Ncxe5 22. Nxe5 Bxe5 23. Be3 d4 24. Ne4 Qe7 25. Bg5 Qf7 26. Bh4 Qh5 27. g3 Bxg3 28. Nxg3 Qxh4 29. Rc5 0-1

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.04.30"]
[Round "5"]
[White "De Groot, Jacob"]
[Black "Geene, Joris"]
[Result "1/2-1/2"]
[ECO "C78"]
[BlackElo "1729"]
[PlyCount "121"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 5. c3 Nf6 6. d3 h6 7. 0-0 b5 8. Bb3 0-0 9. Re1 d6 10. Nbd2 Re8 11. Nf1 Be6 12. Bc2 d5 13. exd5 Bxd5 14. Be3 Bd6 15. a4 Ne7 16. Ng3 Qd7 17. Ne4 Nh7 18. c4 Bxe4 19. dxe4 Qc6 20. cxb5 axb5 21. a5 Ng6 22. Qb1 Bb4 23. Bd2 Bxd2 24. Nxd2 Ng5 25. b4 Red8 26. Nf1 Nf4 27. Ra3 Rd4 28. h4 Nh7 29. Rg3 Qd6 30. Rb3 Nf6 31. Ng3 g6 32. Ne2 Nxe2+ 33. Rxe2 Rd8 34. Ree3 Ng4 35. Red3 Qf6 36. Qe1 Qxh4 37. Rxd4 Rxd4 38. Rh3 Qe7 39. Rb3 Qd6 40. Qe2 Rd2 41. Qxg4 Rxc2 42. Rb1 Qd2 43. Qg3 c5 44. a6 Ra2 45. bxc5 Rxa6 46. Qxe5 b4 47. Qb8+ Kg7 48. Qxb4 Qxb4 49. Rxb4 Ra1+ 50. Kh2 Rc1 51. Rb5 Kf6 52. Kg3 Ke5 53. f3 Rc4 54. c6+ Ke6 55. Rb6 Rc5 56. Kf4 h5 57. c7+ Ke7 58. Rb7 g5+ 59. Ke3 Ke6 60. Rb6+ Ke7 61. Rb7 1/2-1/2

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.04.29"]
[Round "4"]
[White "Majhi, Ankit"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C12"]
[WhiteElo "2128"]
[PlyCount "71"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bc1 Ne4 7. Qg4 Kf8 8. Nge2 Nxc3 9. bxc3 Be7 10. h4 c5 11. h5 f5 12. Qg6 Qe8 13. Nf4 Qf7 14. Ba3 Nc6 15. Qg3 Ke8 16. Ng6 Rg8 17. Nxe7 Kxe7 18. Bxc5+ Kd7 19. Bb5 b6 20. Bd6 Bb7 21. Qf3 g5 22. g4 a6 23. Bd3 f4 24. Rb1 Rgc8 25. Rxb6 Nd8 26. 0-0 Rc6 27. Rfb1 Rxb6 28. Rxb6 Kc8 29. a3 Nc6 30. Bg6 Qg7 31. Qd3 Na5 32. Bc5 Nc6 33. Be8 Nd8 34. Bd6 Qg8 35. Qg6 Qxg6 36. hxg6 1-0

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.04.28"]
[Round "3"]
[White "De Groot, Jacob"]
[Black "De Boer, Bas"]
[Result "1-0"]
[ECO "B76"]
[PlyCount "79"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. h4 d5 10. Nxc6 bxc6 11. 0-0-0 h5 12. exd5 Nxd5 13. Nxd5 cxd5 14. Qxd5 Qc7 15. Qc5 Qb7 16. b3 Bf5 17. Bd3 Rfc8 18. Qa5 Bxd3 19. Rxd3 Qc6 20. c4 Qf6 21. Bd4 Qf4+ 22. Qd2 Qxd2+ 23. Kxd2 e5 24. Bc3 Bh6+ 25. Kc2 Bf4 26. Rhd1 Bg3 27. Be1 Bf4 28. g3 Bh6 29. Rd5 Re8 30. Bc3 Bg7 31. Re1 f6 32. Ba5 Bf8 33. b4 Rec8 34. c5 a6 35. Kc3 Ra7 36. Kc4 Kf7 37. Red1 Be7 38. Rd7 Raa8 39. Rb7 Ke6 40. Rdd7 1-0

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.04.27"]
[Round "2"]
[White "Bruschke, Alexander"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "C12"]
[WhiteElo "1517"]
[PlyCount "28"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. exf6 hxg5 7. fxg7 Rg8 8. Nf3 Qf6 9. Qd2 Qxg7 10. 0-0-0 Nc6 11. Bb5 Bd7 12. Qe3 0-0-0 13. a3 Bd6 14. h3 Bf4 0-1

[Event "NED-ch U17"]
[Site "Rotterdam"]
[Date "2014.04.26"]
[Round "1"]
[White "De Groot, Jacob"]
[Black "Baselmans, Sam"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "60"]
[EventDate "2014.04.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. Nge2 0-0 6. Bb3 e5 7. dxe5 dxe5 8. Bg5 c6 9. a4 Na6 10. Ng3 Nc5 11. Ba2 Qb6 12. Qc1 Be6 13. Bxe6 Nxe6 14. Be3 Qc7 15. 0-0 Rfd8 16. Nce2 h5 17. f3 Rd7 18. a5 c5 19. Nc3 Nd4 20. Nce2 h4 21. Bxd4 cxd4 22. Nh1 Rc8 23. Qe1 Qc5 24. Nf2 Bh6 25. Nd3 Qb5 26. Qxh4 Be3+ 27. Kh1 Rxc2 28. Rfd1 g5 29. Qe1 Nh5 30. h4 Rxe2 0-1

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.10"]
[Round "9"]
[White "De Groot, Jacob"]
[Black "Elgersma, Simon"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1740"]
[BlackElo "1567"]
[PlyCount "34"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. Nc3 Ne7 6. Nge2 0-0 7. Be3 Nbc6 8. Qd2 Nb4 9. 0-0 Nxd3 10. Qxd3 Bf5 11. Qd2 c6 12. f3 Re8 13. g4 Bg6 14. h4 h5 15. Bf4 b5 16. Ng3 Bxf4 17. Qxf4 Qb8 1/2-1/2

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.09"]
[Round "8"]
[White "Moerman, Thomas"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "A08"]
[WhiteElo "1663"]
[BlackElo "1740"]
[PlyCount "36"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 Bf5 4. d3 c5 5. 0-0 Nc6 6. c4 e6 7. Na3 Be7 8. Nc2 Bg6 9. Bd2 0-0 10. Ne3 Qd7 11. b3 a6 12. Rb1 b5 13. Qc1 b4 14. a3 bxa3 15. Qxa3 Rfb8 16. Nc2 Qc7 17. Nh4 a5 18. Nxg6 Qd8 1/2-1/2

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.08"]
[Round "6"]
[White "Schaap, Ricky"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1633"]
[BlackElo "1740"]
[PlyCount "55"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Qb6 7. 0-0 Nh6 8. Bxh6 gxh6 9. Qd2 Ne7 10. Bd3 Bb5 11. Bxb5+ Qxb5 12. Na3 Qa5 13. Nc2 Ng6 14. b4 cxb4 15. cxb4 Qd8 16. Rac1 Nh4 17. Nce1 Rg8 18. Nxh4 Qxh4 19. g3 Qe7 20. Nd3 h5 21. Rc2 h4 22. Rfc1 Qd8 23. Rc7 Rb8 24. Qf4 Be7 25. Qh6 Rf8 26. Qxh7 b6 27. Nf4 Bc5 28. Nxe6 1-0

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "5"]
[White "De Groot, Jacob"]
[Black "Corstjens, Rolf"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1740"]
[BlackElo "1830"]
[PlyCount "52"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. Nc3 c6 6. Nge2 Ne7 7. Be3 Qc7 8. Qd2 Bf5 9. Bxf5 Nxf5 10. Bf4 Nd7 11. 0-0-0 0-0-0 12. Bxd6 Qxd6 13. Qf4 Qxf4+ 14. Nxf4 Nf6 15. f3 h5 16. Nce2 Rde8 17. Rde1 Kd7 18. Nd3 Re7 19. c3 Rhe8 20. Ne5+ Kc7 21. Kd2 Nd7 22. Nxd7 Kxd7 23. Nf4 Rxe1 24. Rxe1 Rxe1 25. Kxe1 h4 26. Kf2 Ke7 1/2-1/2

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "4"]
[White "Vandeputte, Samuel"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "1472"]
[BlackElo "1740"]
[PlyCount "106"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. c4 e6 2. g3 Nf6 3. Bg2 d5 4. cxd5 exd5 5. d4 Be6 6. e3 Nbd7 7. Ne2 Nb6 8. 0-0 Qd7 9. Nf4 Be7 10. Nc3 0-0 11. Nxe6 Qxe6 12. b3 Rac8 13. Bd2 a6 14. a4 Ne4 15. a5 Nxc3 16. Bxc3 Nd7 17. Bb2 Nf6 18. Qc2 Ne4 19. Bxe4 dxe4 20. Qc4 Qf5 21. Ba3 Bxa3 22. Rxa3 Rfd8 23. Qe2 c5 24. Ra4 Rd5 25. f3 cxd4 26. Rxd4 Rxd4 27. exd4 Qd5 28. Qxe4 Qxb3 29. Rf2 h6 30. Kg2 Rd8 31. Rd2 Qb5 32. d5 Qxa5 33. Rd3 Qc5 34. d6 Rxd6 35. Rxd6 Qxd6 36. Qxb7 Qd2+ 37. Kh3 Qa2 38. g4 a5 39. Kg3 a4 40. h4 Qb3 41. Qa8+ Kh7 42. h5 Qb4 43. Qc8 Qb1 44. Qa8 Qe1+ 45. Kh3 Qb4 46. Qc8 a3 47. Qf5+ Kg8 48. Qc8+ Qf8 49. Qc2 Qa8 50. Qa2 Qxf3+ 51. Kh4 Qf6+ 52. Kh3 Qc3+ 53. Kh4 Qb2 0-1

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "3"]
[White "De Groot, Jacob"]
[Black "Van der Hoeven, Carsten"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1740"]
[BlackElo "1257"]
[PlyCount "61"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. Nge2 b6 6. Bb3 Bb7 7. Ba4+ c6 8. Be3 b5 9. Bb3 a5 10. a3 a4 11. Ba2 0-0 12. f3 Nbd7 13. 0-0 Ba6 14. Qd2 Qc7 15. f4 Rfd8 16. f5 c5 17. Nd5 Nxd5 18. Bxd5 Bb7 19. fxg6 Bxd5 20. gxh7+ Kxh7 21. exd5 Rh8 22. Rf3 Nf6 23. Rh3+ Kg8 24. Rxh8+ Kxh8 25. Rf1 Kh7 26. Qd3+ Kg8 27. Rf3 c4 28. Qf5 Qb7 29. Nf4 Re8 30. Nh5 Nxh5 31. Qxf7+ 1-0

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "2"]
[White "De Kraker, Lena"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1446"]
[BlackElo "1740"]
[PlyCount "103"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. c4 Be6 5. cxd5 Bxd5 6. Nc3 Bc6 7. Be3 Nf6 8. Nf3 Be7 9. Be2 0-0 10. 0-0 Nd5 11. Bc4 Nxc3 12. bxc3 Bd5 13. Bxd5 Qxd5 14. Qb3 Qxb3 15. axb3 Nd7 16. Bf4 c6 17. Rfe1 Bf6 18. Bd6 Rfd8 19. Be7 Bxe7 20. Rxe7 Kf8 21. Rae1 f6 22. Nh4 Re8 23. Nf5 g6 24. Rxe8+ Rxe8 25. Rxe8+ Kxe8 26. Nd6+ Ke7 27. Nxb7 Nb6 28. c4 Nc8 29. Kf1 Kd7 30. Ke2 Ne7 31. Nc5+ Kd6 32. Ne4+ Ke6 33. Ng3 f5 34. Kd3 Ng8 35. Ne2 Nf6 36. h3 g5 37. b4 Ne4 38. Ke3 Nd6 39. Kd3 Ne4 40. f3 Nd6 41. Nc3 h5 42. d5+ cxd5 43. Nxd5 Ke5 44. Nc3 a6 45. c5 Nb5 46. Nxb5 axb5 47. c6 Kd6 48. Kd4 Kxc6 49. Ke5 f4 50. Ke6 h4 51. Ke5 Kc7 52. Kd5 1-0

[Event "NED-ch U14 op"]
[Site "Borne"]
[Date "2013.08.05"]
[Round "1"]
[White "De Groot, Jacob"]
[Black "Schelleman, Niels"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1740"]
[BlackElo "1125"]
[PlyCount "135"]
[EventDate "2013.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 c6 4. dxc6 Nxc6 5. g3 e5 6. Bg2 Bd7 7. Nge2 Bc5 8. 0-0 0-0 9. d3 h6 10. a3 Re8 11. Ne4 Nxe4 12. Bxe4 Qc7 13. Nc3 Nd4 14. Nd5 Qd6 15. c3 Nb5 16. b4 Bb6 17. c4 Bd4 18. Rb1 Nc3 19. Nxc3 Bxc3 20. Be3 Bh3 21. Bg2 Bxg2 22. Kxg2 Bd4 23. Qb3 a6 24. Rbe1 Rad8 25. Rd1 Qc6+ 26. Kg1 Qf3 27. Rde1 Qf5 28. Qc2 Re6 29. Bxd4 Rxd4 30. Re4 Rxe4 31. dxe4 Qf3 32. a4 Qa3 33. b5 axb5 34. axb5 b6 35. Rd1 Re8 36. Rd5 Qa5 37. Qd3 Rc8 38. Rd8+ Rxd8 39. Qxd8+ Kh7 40. Qd5 f6 41. Kg2 Qb4 42. Qc6 Qb1 43. f3 Qb2+ 44. Kh3 Qd4 45. c5 bxc5 46. b6 Qc4 47. Kg4 f5+ 48. Kxf5 Qf7+ 49. Kxe5 Qh5+ 50. Kd6 Qxf3 51. Kxc5 Qc3+ 52. Kd6 Qf6+ 53. Kd5 Qg5+ 54. e5 Qd2+ 55. Ke6 Qa2+ 56. Ke7 Qa3+ 57. Ke8 Qb3 58. e6 Qd3 59. Qd7 Qg6+ 60. Kd8 Qg5+ 61. e7 h5 62. h3 Qe5 63. e8Q Qb8+ 64. Qc8 Qd6+ 65. Qed7 Qf8+ 66. Kc7 Qc5+ 67. Kb7 Qf2 68. Qf5+ 1-0

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.04"]
[Round "8"]
[White "Oord, Raymon"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "D82"]
[WhiteElo "1779"]
[PlyCount "50"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. d4 g6 4. Bf4 c6 5. e3 Bg7 6. Rc1 Be6 7. cxd5 Nxd5 8. Nxd5 Bxd5 9. b3 Nd7 10. Nf3 0-0 11. Bc4 Bxf3 12. gxf3 e5 13. dxe5 Nxe5 14. Qe2 Qa5+ 15. Kf1 Rad8 16. e4 b5 17. Bxe5 Bxe5 18. Bd3 Rd6 19. Kg2 Qd8 20. Rcd1 Qg5+ 21. Kf1 Rfd8 22. Rg1 Qh4 23. Rh1 Qh3+ 24. Ke1 Bc3+ 25. Rd2 Rxd3 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.03"]
[Round "7"]
[White "De Groot, Jacob"]
[Black "Keetman, Maaike"]
[Result "0-1"]
[ECO "B48"]
[BlackElo "1850"]
[PlyCount "78"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. Be3 Nc6 8. 0-0 Ne5 9. h3 Bc5 10. Kh1 0-0 11. f4 Ng6 12. Qe1 d6 13. f5 Ne5 14. Qh4 b5 15. Nce2 Qb6 16. a3 Nxd3 17. Rf3 Ne5 18. Rg3 Ne8 19. Bh6 Ng6 20. fxg6 fxg6 21. Bg5 Bxd4 22. Bd8 Qa7 23. Nxd4 Qxd4 24. Rd3 Qf2 25. Qe7 Ra7 26. Qg5 Qf4 27. Qxf4 Rxf4 28. Rc3 Bb7 29. e5 Rf2 30. Bb6 Rxg2 31. Bxa7 dxe5 32. Bb6 h6 33. Rd3 Nf6 34. Ba5 Nh5 35. Be1 Nf4 36. Rd8+ Kh7 37. Rad1 Nxh3 38. R8d5 Bxd5 39. Rxd5 Rg1+ 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.02"]
[Round "6"]
[White "Yang, Wang"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "126"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 c4 5. a3 a5 6. b5 Nd7 7. d3 cxd3 8. cxd3 f6 9. d4 fxe5 10. dxe5 Bc5 11. Be2 Ne7 12. Bd3 Qb6 13. 0-0 Nf8 14. Nc3 Qc7 15. Na4 Nfg6 16. Qc2 Bb6 17. Qb2 0-0 18. Bxg6 Nxg6 19. Bg5 Ba7 20. b6 Qc6 21. Qb3 Bb8 22. Rac1 Qe8 23. Rfe1 Bd7 24. Nc5 Bc6 25. Nd3 h6 26. Bd2 Qf7 27. Be3 Ne7 28. Nd4 Re8 29. Nc5 Bxe5 30. Ncxe6 Qh5 31. f4 Bd6 32. Nxc6 Nxc6 33. Rxc6 Rxe6 34. Rcc1 Rae8 35. Qc3 Qf7 36. g3 Qf8 37. Ra1 Re4 38. Bf2 Rxe1+ 39. Bxe1 Bc5+ 40. Bf2 Bxf2+ 41. Kxf2 Qe7 42. Ra2 a4 43. Qd2 Qc5+ 44. Kg2 Re6 45. Rc2 Qb5 46. Rb2 Qc4 47. Kh3 Qf1+ 48. Kh4 Qf3 49. g4 Re3 50. Qg2 Rxa3 51. Qxf3 Rxf3 52. Rd2 Rb3 53. Rxd5 Rxb6 54. Ra5 Ra6 55. Rd5 a3 56. g5 hxg5+ 57. fxg5 Kf8 58. Rf5+ Ke7 59. Re5+ Kd6 60. Re1 a2 61. Ra1 b5 62. g6 b4 63. Kg5 b3 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.01"]
[Round "5"]
[White "De Groot, Jacob"]
[Black "Kuiper, Adrian"]
[Result "1-0"]
[ECO "B90"]
[PlyCount "69"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Nbd7 9. g4 Be7 10. Qd2 Rc8 11. 0-0-0 b5 12. g5 Nh5 13. Kb1 Nb6 14. Bxb6 Qxb6 15. Nd5 Bxd5 16. exd5 Nf4 17. h4 0-0 18. Na5 Nxd5 19. Qxd5 Qxa5 20. Bd3 Kh8 21. Qe4 g6 22. h5 Kg7 23. f4 Qa4 24. Qb7 Rce8 25. f5 Bxg5 26. hxg6 hxg6 27. fxg6 e4 28. Be2 Rc8 29. c3 b4 30. Qxe4 fxg6 31. Qb7+ Kf6 32. Rhf1+ Ke6 33. Bg4+ Rf5 34. Rde1+ Kf6 35. Qe7# 1-0

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.30"]
[Round "4"]
[White "Vandeputte, Samuel"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "D71"]
[WhiteElo "1416"]
[PlyCount "91"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nc3 Nxc3 7. bxc3 c5 8. e3 0-0 9. Ne2 Nc6 10. 0-0 Qc7 11. Ba3 cxd4 12. cxd4 Qa5 13. Bb2 Bg4 14. h3 Bd7 15. Bc3 Qd8 16. Rb1 Rb8 17. d5 Na5 18. Bxg7 Kxg7 19. Qd4+ Kg8 20. Qxa7 b6 21. Qa6 Bc8 22. Qd3 Nb7 23. Rfc1 Bd7 24. Qc2 Nc5 25. Nd4 Ba4 26. Qe2 Qd6 27. Nc6 Bxc6 28. dxc6 e5 29. Rd1 Qc7 30. Qc4 Ra8 31. Qc2 Rfe8 32. Qb2 Rab8 33. Bd5 Red8 34. e4 Kf8 35. Qb4 Rd6 36. Rd2 Kg7 37. f4 Rf6 38. Qb2 Na4 39. Qxe5 Qxe5 40. fxe5 Rf3 41. Kg2 Rc3 42. Rf1 Rf8 43. Rdf2 Kh6 44. Rxf7 Rxf7 45. Rxf7 b5 46. e6 1-0

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.29"]
[Round "3"]
[White "De Groot, Jacob"]
[Black "Roesink, Veron"]
[Result "0-1"]
[ECO "B35"]
[PlyCount "58"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Bc4 d6 8. Bb3 Ng4 9. Nxc6 bxc6 10. Bg5 Qa5 11. Bd2 Bd4 12. Qe2 Bxf2+ 13. Kd1 Qh5 14. Kc1 Bb6 15. h3 Nf2 16. Qc4 0-0 17. Rf1 Be6 18. Qa6 Bxb3 19. axb3 d5 20. exd5 cxd5 21. Ra4 d4 22. Ne2 Ne4 23. Nf4 Qg5 24. Rb4 Nxd2 25. Rb5 Qh6 26. Kxd2 Bc7 27. g3 e5 28. Qc6 Rac8 29. Rb7 Ba5+ 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.28"]
[Round "2"]
[White "De Groot, Jacob"]
[Black "Lecomte, Robin"]
[Result "0-1"]
[ECO "B77"]
[BlackElo "1874"]
[PlyCount "58"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Bc4 Nc6 8. Bb3 0-0 9. f3 Bd7 10. h4 Rc8 11. Qd2 a5 12. g4 Ne5 13. h5 a4 14. Nxa4 Bxa4 15. Bxa4 Nc4 16. Qe2 Nxe3 17. Qxe3 Qa5+ 18. c3 Qxa4 19. hxg6 fxg6 20. Ne6 Rf7 21. Nf4 Qc2 22. g5 Qxb2 23. Rc1 Nd7 24. Ne2 Qb6 25. Qd2 Ne5 26. Qd5 Nxf3+ 27. Kd1 Qc6 28. Qd3 Nxg5 29. Ng3 Rf3 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.27"]
[Round "1"]
[White "Baselmans, Sam"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "D85"]
[PlyCount "120"]
[EventDate "2013.04.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 0-0 8. Be2 c5 9. Be3 Qa5 10. Qc2 Nc6 11. 0-0 Rd8 12. Rad1 Bg4 13. d5 Bxf3 14. Bxf3 Ne5 15. Be2 a6 16. Rb1 Rab8 17. c4 Nd7 18. Rb3 Qc7 19. Rd1 Re8 20. Bg4 Nf6 21. Be2 Red8 22. g3 Ne8 23. Rdb1 Be5 24. Bd2 Ng7 25. Qd3 e6 26. Qc2 exd5 27. cxd5 Ne8 28. Be3 Bd6 29. Rc1 Qa5 30. Qb2 Qc7 31. Qc3 Qe7 32. f3 Rdc8 33. Rcb1 Be5 34. Qd2 c4 35. Rb4 b5 36. Bd4 Bd6 37. R4b2 Ba3 38. Rc2 Bc5 39. Qe3 Bxd4 40. Qxd4 Nd6 41. Kg2 Re8 42. h3 f5 43. exf5 Nxf5 44. Qc3 Ne3+ 45. Kf2 Nxc2 46. Qxc2 Qc5+ 47. Kf1 Qxd5 48. a4 Qd6 49. axb5 axb5 50. Kg2 Qe5 51. Re1 Qd4 52. Rd1 Qc5 53. Kf1 Rbc8 54. Rc1 Re7 55. Kg2 Rce8 56. Bd3 Rd8 57. Rd1 Red7 58. Be2 Rxd1 59. Bxd1 Qe3 60. Qe2 Rd2 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.06"]
[Round "9"]
[White "De Groot, Jacob"]
[Black "Ousmane, Tijany"]
[Result "1-0"]
[ECO "C86"]
[WhiteElo "1651"]
[BlackElo "1424"]
[PlyCount "38"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. c3 b5 7. Bb3 0-0 8. 0-0 d6 9. d4 Bg4 10. Rd1 exd4 11. cxd4 Bxf3 12. Qxf3 Na5 13. Bc2 d5 14. e5 Ne8 15. Nc3 c6 16. Qh3 g6 17. Rd3 Ng7 18. Rg3 Qc8 19. Qh6 Nh5 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.05"]
[Round "8"]
[White "Blees, Timothy"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "1244"]
[BlackElo "1651"]
[PlyCount "94"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. g3 g6 3. c4 d5 4. Bg2 Bg7 5. Nc3 c6 6. cxd5 cxd5 7. Nf3 Nc6 8. 0-0 0-0 9. Ne5 Bf5 10. Nxc6 bxc6 11. Na4 Ne4 12. f3 Nd6 13. Nc5 e5 14. dxe5 Bxe5 15. e4 Be6 16. f4 Bg7 17. exd5 cxd5 18. Bxd5 Bh3 19. Bg2 Bxg2 20. Kxg2 Nc4 21. Na4 Rb8 22. Rb1 Na3 23. Ra1 Qc7 24. Kg1 Rfd8 25. Qf3 Nc2 26. Rb1 Qc4 27. b3 Qd4+ 28. Qf2 Qd3 29. Qf3 Qxf3 30. Rxf3 Nb4 31. a3 Nc2 32. b4 Rd1+ 33. Rf1 Rd3 34. Bb2 Nxa3 35. Bxa3 Rxa3 36. Nc5 Rc3 37. Na6 Rb6 38. b5 Bd4+ 39. Kg2 Rc2+ 40. Kh3 Rb2 41. Nc7 Rb7 42. Rxb2 Bxb2 43. Rf2 Bd4 44. Rc2 Bb6 45. Nd5 Ba5 46. Rb2 Bd8 47. Kg4 Rd7 1/2-1/2

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.04"]
[Round "7"]
[White "De Groot, Jacob"]
[Black "Wolters, Alec"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1651"]
[BlackElo "1536"]
[PlyCount "42"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Bb5 d6 4. Bxc6+ bxc6 5. f4 g6 6. Nf3 Bg7 7. 0-0 e6 8. d3 Ne7 9. Qe1 d5 10. h3 0-0 11. Qh4 f5 12. g4 Rb8 13. Re1 Re8 14. Qg3 Bd7 15. h4 Kh8 16. h5 gxh5 17. Ng5 Rf8 18. Qh4 Bf6 19. Qxh5 Bxg5 20. Qxg5 Ng6 21. Qxd8 Rfxd8 1/2-1/2

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.03"]
[Round "6"]
[White "Brouwer, Jorn"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1287"]
[BlackElo "1651"]
[PlyCount "100"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 Bd6 5. Nxd5 Nc6 6. Be3 Bxh2 7. c4 Bd6 8. Nf3 Nf6 9. Qb3 Rb8 10. 0-0-0 Nxd5 11. cxd5 Ne7 12. Bc4 Bg4 13. Qb5+ Qd7 14. Qxd7+ Bxd7 15. Ng5 h6 16. Bd3 Bf5 17. Bxf5 Nxf5 18. Rde1 0-0 19. Ne4 Bb4 20. Re2 Rbd8 21. a3 Ba5 22. Nc5 Rxd5 23. Nxb7 Bb6 24. Rc2 Nxd4 25. Bxd4 Rxd4 26. Nc5 Re8 27. Na6 Re7 28. Nb8 Rde4 29. Nc6 Re8 30. f3 Re2 31. g4 Rxc2+ 32. Kxc2 Re2+ 33. Kc1 Rf2 34. Rh3 Be3+ 35. Kb1 Kf8 36. f4 Bb6 37. Rd3 g6 38. Rd8+ Kg7 39. Ne7 Rxf4 40. Rg8+ Kh7 41. Rf8 Bc5 42. Re8 Re4 43. Nd5 Rxe8 44. Nf6+ Kh8 45. Nxe8 Bd6 46. Kc2 Be5 47. b4 Kg8 48. Kd3 Kf8 49. Ke4 Kxe8 50. Kxe5 Ke7 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.02"]
[Round "5"]
[White "De Groot, Jacob"]
[Black "Van den Bergh, Dennis"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1651"]
[BlackElo "1434"]
[PlyCount "64"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. f4 Ngf6 6. Nf3 e6 7. 0-0 Be7 8. d3 0-0 9. h3 Nb6 10. Qe1 d5 11. g4 dxe4 12. dxe4 Qc7 13. Kg2 a6 14. Qg3 Qc6 15. Ne5 Qc7 16. Rh1 Rad8 17. h4 Nfd7 18. Nxd7 Rxd7 19. h5 f6 20. Qh3 h6 21. Re1 Bd6 22. Qf3 e5 23. f5 Be7 24. Be3 Rfd8 25. Rad1 Kf8 26. Qf1 Qc6 27. Kf3 Na4 28. Rd3 Nxc3 29. Rxc3 b5 30. Rd3 c4 31. Rxd7 Qxd7 32. a4 Ke8 1/2-1/2

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.05.01"]
[Round "4"]
[White "Yang, Wang"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "C00"]
[WhiteElo "1573"]
[BlackElo "1651"]
[PlyCount "61"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 c4 5. c3 Nc6 6. d3 Qc7 7. dxc4 Nxe5 8. Nxe5 Qxe5+ 9. Be3 Nf6 10. cxd5 Qxd5 11. Qxd5 Nxd5 12. Bb5+ Bd7 13. Bxd7+ Kxd7 14. Ke2 Rc8 15. Rd1 Bd6 16. a3 Rhd8 17. h3 Nxc3+ 18. Nxc3 Rxc3 19. Bxa7 Ke7 20. Bd4 Rc2+ 21. Kf3 f6 22. Rdc1 Rdc8 23. Rxc2 Rxc2 24. Rb1 Rc4 25. Bc5 Rc3+ 26. Ke4 Rxa3 27. Rd1 Bxc5 28. bxc5 Ra4+ 29. Ke3 Rb4 30. Rd2 e5 31. Kd3 1/2-1/2

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.04.30"]
[Round "3"]
[White "Luk, Jaimy"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "1754"]
[BlackElo "1651"]
[PlyCount "81"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[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 Bc5 9. Nce2 a6 10. c3 Nxd4 11. Bxd4 0-0 12. Bxc5 Nxc5 13. Nd4 Bd7 14. Bd3 f6 15. exf6 Qxf6 16. 0-0 Rae8 17. Bc2 Qh6 18. Qf3 Bc6 19. Qg3 Nd7 20. Rae1 Nb6 21. b3 Rf6 22. Qe3 Nc8 23. Qe5 Ref8 24. f5 Bd7 25. Rf3 Re8 26. fxe6 Rfxe6 27. Qxd5 Nb6 28. Rxe6 Nxd5 29. Rxh6 gxh6 30. Bd3 Nc7 31. Bc4+ Be6 32. Nxe6 Nxe6 33. Re3 Kf7 34. Rxe6 Rxe6 35. Kf2 b5 36. Bxe6+ Kxe6 37. Ke3 Ke5 38. c4 b4 39. g4 h5 40. gxh5 a5 41. h6 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.04.29"]
[Round "2"]
[White "De Groot, Jacob"]
[Black "Geene, Joris"]
[Result "0-1"]
[ECO "C64"]
[WhiteElo "1651"]
[BlackElo "1582"]
[PlyCount "94"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. c3 d6 5. h3 Nge7 6. 0-0 0-0 7. d4 exd4 8. cxd4 Bb6 9. Nc3 a6 10. Ba4 Ng6 11. Bg5 f6 12. Be3 Bd7 13. Bb3+ Kh8 14. Nd5 Ba7 15. Nf4 Qe8 16. Qd3 Na5 17. Qc3 Nxb3 18. Qxb3 Nxf4 19. Bxf4 Qxe4 20. Qe3 Qg6 21. Nd2 Rfe8 22. Qc3 Bc6 23. Bg3 f5 24. Nf3 Re4 25. Rfe1 Rae8 26. Rxe4 fxe4 27. Nh2 e3 28. Re1 exf2+ 29. Kxf2 Qf6+ 30. Nf3 Rxe1 31. Kxe1 Bxf3 32. gxf3 Qxd4 33. Qxc7 Qe3+ 34. Kd1 Qxf3+ 35. Kc2 Qe4+ 36. Kb3 Qd3+ 37. Qc3 Qxc3+ 38. Kxc3 d5 39. Be5 Kg8 40. Bd4 Bxd4+ 41. Kxd4 g5 42. Kxd5 Kf7 43. Ke5 Kg6 44. b4 h5 45. a4 g4 46. Kf4 gxh3 47. Kg3 Kf5 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2012.04.28"]
[Round "1"]
[White "Dijkhuis, Tycho"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2123"]
[BlackElo "1651"]
[PlyCount "37"]
[EventDate "2012.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 c5 7. Bxe7 Qxe7 8. Nb5 Kd8 9. c3 Nc6 10. Nd6 f6 11. f4 Rf8 12. Nf3 fxe5 13. fxe5 Rf4 14. Qd2 Qf8 15. Ng5 Nb6 16. Nxh7 Qh8 17. Qxf4 Qxh7 18. Qf8+ Kc7 19. Nb5+ 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "7"]
[White "De Groot, Jacob"]
[Black "Halfhide, Sebastian"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1395"]
[BlackElo "1119"]
[PlyCount "80"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Bb5 Qc7 5. d3 Nge7 6. Nf3 d6 7. Bxc6+ Nxc6 8. 0-0 g6 9. Qe1 Bg7 10. Be3 b6 11. h3 Bb7 12. Qh4 Qd8 13. Qf2 0-0 14. Rad1 Qe7 15. d4 cxd4 16. Nxd4 Nxd4 17. Bxd4 Rfd8 18. Bxg7 Kxg7 19. Rfe1 Rd7 20. Qd4+ Kg8 21. f5 e5 22. Qf2 Rc7 23. Nd5 Bxd5 24. Rxd5 Rac8 25. c3 Rc5 26. Red1 Rxd5 27. Rxd5 Rc5 28. f6 Qd8 29. Qf3 Rxd5 30. exd5 e4 31. Qf4 b5 32. Kf1 h6 33. Ke2 g5 34. Qf5 a5 35. Ke3 b4 36. cxb4 Qb6+ 37. Kxe4 Qxb4+ 38. Ke3 Qe1+ 39. Kd4 Qb4+ 40. Ke3 Qe1+ 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "9"]
[White "De Groot, Jacob"]
[Black "Kuiper, Adrian"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1395"]
[BlackElo "1456"]
[PlyCount "69"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 Nf6 4. Nf3 Nbd7 5. Bb5 a6 6. Bxd7+ Nxd7 7. 0-0 e6 8. d3 Be7 9. Qe1 0-0 10. Qg3 Nf6 11. Qh3 e5 12. f5 b5 13. Ng5 Bb7 14. Nf3 b4 15. Ne2 Qc7 16. g4 Nxe4 17. dxe4 Bxe4 18. Ng5 Bxg5 19. Bxg5 Bxc2 20. f6 Qd7 21. fxg7 Kxg7 22. Bh6+ Kh8 23. Qh4 Qe6 24. Bxf8 Rxf8 25. Qf6+ Qxf6 26. Rxf6 Rg8 27. Rxd6 Rxg4+ 28. Kf2 Be4 29. Rg1 Rxg1 30. Nxg1 Bb7 31. Rd7 Be4 32. Rxf7 Bb1 33. a3 bxa3 34. bxa3 c4 35. Rc7 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "8"]
[White "Schaap, Ricky"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "B03"]
[WhiteElo "1427"]
[BlackElo "1395"]
[PlyCount "120"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. exd6 cxd6 5. Bc4 Nb6 6. Bb3 Bf5 7. Qf3 e6 8. Qxb7 N8d7 9. Qf3 Rc8 10. c3 Be7 11. Ne2 0-0 12. 0-0 d5 13. Ng3 Bg6 14. Bf4 Nf6 15. Nd2 Bd6 16. Bg5 Re8 17. Bxf6 Qxf6 18. Qxf6 gxf6 19. f4 Bd3 20. Rf3 Ba6 21. Nh5 Be7 22. Rg3+ Kh8 23. Rg7 Rf8 24. Bc2 f5 25. Nf3 Be2 26. Bd1 Bxf3 27. Bxf3 Nd7 28. Rg3 Nf6 29. Nxf6 Bxf6 30. Be2 Rb8 31. b4 Rfc8 32. Kf1 Rc7 33. a4 Be7 34. Bh5 Bd6 35. Rf3 Rbc8 36. b5 Rb7 37. g3 Kg7 38. Re3 Bc7 39. Ke2 Ba5 40. Ra3 Rbc7 41. Kd2 Rc4 42. Rd3 R8c7 43. Be2 Rc8 44. Kc2 Ra8 45. Bd1 Rac8 46. Kb2 R4c7 47. h3 Rb8 48. Be2 Rcb7 49. Re3 Rc7 50. g4 fxg4 51. hxg4 Rg8 52. g5 Kh8 53. Rh3 f5 54. Bh5 Rb7 55. g6 hxg6 56. Bxg6+ Kg7 57. Bh5 Kf6 58. Bf3 a6 59. Rh5 axb5 60. Rh6+ Rg6 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "5"]
[White "De Groot, Jacob"]
[Black "Mouhdad, Yassine"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1395"]
[BlackElo "1675"]
[PlyCount "119"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. h3 e6 6. Bc4 Ne7 7. 0-0 a6 8. d3 d5 9. Bb3 0-0 10. exd5 Nxd5 11. Ne4 Qc7 12. Qd2 b5 13. c4 Ne7 14. g4 Bb7 15. Qf2 b4 16. Qxc5 Qxc5+ 17. Nxc5 Bxf3 18. Rxf3 Nbc6 19. Ne4 Nd4 20. Rf1 Ne2+ 21. Kg2 Nxc1 22. Raxc1 Bxb2 23. Rc2 Bd4 24. Kf3 a5 25. Ba4 Rac8 26. Nd6 Rcd8 27. Ne4 Rc8 28. Rfc1 Nc6 29. c5 Rc7 30. Rc4 Rd8 31. Bxc6 Rxc6 32. Nd6 Bf6 33. Ke3 Be7 34. Ne4 f5 35. Nd2 Kf7 36. Nf3 Bf6 37. d4 Rdc8 38. Ne5+ Bxe5 39. fxe5 Ke7 40. Kd2 Ra8 41. Ke3 Rac8 42. Kf4 Kf7 43. Rb1 Rb8 44. Rb3 Rcc8 45. Ke3 Ke7 46. Rc1 a4 47. Rbb1 Rb7 48. a3 b3 49. Kd3 Kd7 50. Kc3 Kc6 51. Rd1 Rd8 52. Rf1 Rf8 53. gxf5 Rxf5 54. Rxf5 gxf5 55. Kd3 Kd5 56. Re1 Rg7 57. Kc3 Rb7 58. Rg1 Rb8 59. Kb2 Kxd4 60. Rc1 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "4"]
[White "De Groot, Jacob"]
[Black "Roesink, Veron"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1395"]
[BlackElo "1488"]
[PlyCount "91"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 d6 6. 0-0 Bd7 7. Bxc6 Bxc6 8. d4 cxd4 9. Nxd4 Qb6 10. Be3 Qxb2 11. Qd3 a6 12. Rab1 Qa3 13. Rb3 Qa5 14. f5 Qc7 15. Nd5 Bxd5 16. exd5 Rc8 17. c3 Nf6 18. Bg5 0-0 19. Qf3 Qd7 20. fxg6 hxg6 21. Bxf6 Bxf6 22. Qf4 Kg7 23. Rf3 Rh8 24. h3 Rh4 25. Qg3 Bxd4+ 26. cxd4 Rxd4 27. Rxf7+ Kxf7 28. Qf2+ Kg8 29. Qxd4 b5 30. Qe4 Qe8 31. Rg3 Kg7 32. Qd4+ Kh7 33. Qh4+ Kg8 34. Qh6 Rc4 35. Rxg6+ Qxg6 36. Qxg6+ Kf8 37. Qf5+ Ke8 38. g4 Rd4 39. a3 Ra4 40. g5 Rxa3 41. g6 Kd8 42. Qf7 Kd7 43. g7 Rg3+ 44. Kh2 Rxg7 45. Qxg7 a5 46. Qa1 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "6"]
[White "Van Eek, Simon"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "B02"]
[WhiteElo "1330"]
[BlackElo "1395"]
[PlyCount "72"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Bc4 Nb6 5. Bb3 c5 6. Qe2 e6 7. Nf3 g6 8. 0-0 Bg7 9. Rd1 0-0 10. a3 Nc6 11. d3 Re8 12. Be3 Nd4 13. Bxd4 cxd4 14. Ne4 e5 15. Nfg5 Nd5 16. Qf3 Rf8 17. Bxd5 Qe7 18. Qg3 Qd7 19. Qh4 h6 20. Bxf7+ Rxf7 21. Nxf7 Qxf7 22. Qd8+ Bf8 23. Nd6 Qe6 24. Nxc8 Rxc8 25. Qa5 a6 26. Qa4 b5 27. Qb3 Qxb3 28. cxb3 Rc2 29. Rab1 Be7 30. Kf1 Bg5 31. g3 Bd2 32. Kg1 Kf7 33. f3 Be3+ 34. Kh1 Ke6 35. Rf1 g5 36. g4 Kd5 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "1"]
[White "De Groot, Jacob"]
[Black "Slomczewski, Michal"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1395"]
[BlackElo "1578"]
[PlyCount "94"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Bb5 Qc7 5. d3 Nge7 6. Nf3 d6 7. 0-0 g6 8. Be3 Bg7 9. Qe1 Bd7 10. Qf2 b6 11. d4 cxd4 12. Nxd4 Nxd4 13. Bxd7+ Kxd7 14. Bxd4 Bxd4 15. Qxd4 Qc5 16. Qxc5 bxc5 17. Rad1 Kc6 18. Rfe1 Rhd8 19. b3 Rd7 20. Kf2 Rad8 21. Ne2 d5 22. exd5+ Rxd5 23. Nc3 Rd2+ 24. Rxd2 Rxd2+ 25. Re2 Rd4 26. Re4 Nd5 27. Rxd4 cxd4 28. Nxd5 Kxd5 29. Kf3 f6 30. h4 e5 31. g4 e4+ 32. Ke2 Kc5 33. a3 a5 34. Kd2 f5 35. g5 a4 36. Ke2 axb3 37. cxb3 d3+ 38. Ke3 Kd5 39. a4 Kc5 40. Kd2 Kd4 41. a5 e3+ 42. Kd1 Kc3 43. a6 e2+ 44. Ke1 d2+ 45. Kxe2 Kc2 46. a7 d1Q+ 47. Ke3 Qg1+ 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "3"]
[White "Franken, Floyd"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "1158"]
[BlackElo "1395"]
[PlyCount "94"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. d4 e6 5. Nce2 c5 6. c3 Nc6 7. Be3 b6 8. f4 Ba6 9. Nf3 Rc8 10. Ng3 Bxf1 11. Nxf1 Ne7 12. Ng3 Nf5 13. Nxf5 exf5 14. 0-0 Be7 15. Qd3 g6 16. Rac1 0-0 17. Bf2 c4 18. Qe3 b5 19. a3 Qb6 20. Rfe1 Rfe8 21. e6 Nf6 22. exf7+ Kxf7 23. Ne5+ Kg8 24. Bh4 Ne4 25. Bxe7 Rxe7 26. Qe2 Rce8 27. Qd1 g5 28. g3 gxf4 29. gxf4 Rg7+ 30. Kf1 Qh6 31. Nf3 Qxf4 32. Qe2 Qg4 33. Rc2 Ng3+ 34. hxg3 Rxe2 35. Kxe2 Qe4+ 36. Kd1 Qxf3+ 37. Rce2 Re7 38. Kd2 Qd3+ 39. Kc1 Rxe2 40. Rxe2 Qxe2 41. Kb1 Kf8 42. Ka2 Ke7 43. a4 bxa4 44. g4 fxg4 45. Ka3 Qc2 46. Ka2 a3 47. Kxa3 Qb3# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "2"]
[White "Van Dael, Rens"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "B02"]
[WhiteElo "1052"]
[BlackElo "1395"]
[PlyCount "74"]
[EventDate "2011.06.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Nf3 Bg4 5. Bc4 e6 6. 0-0 Nb6 7. Qe2 c5 8. Bb5+ N8d7 9. Qe4 Bxf3 10. Qxf3 Qc7 11. d3 Bd6 12. g3 0-0 13. Qg4 Ne5 14. Qh5 g6 15. Qe2 a6 16. Bc4 Nbxc4 17. dxc4 Qc6 18. Bh6 Nf3+ 19. Qxf3 Qxf3 20. Bxf8 Bxf8 21. Rae1 Bg7 22. Re3 Qc6 23. Nd1 Rd8 24. b3 Rd2 25. c3 Rxa2 26. Rd3 Qb6 27. Ne3 Ra3 28. Rfd1 Rxb3 29. Rd8+ Bf8 30. Re8 Rb1 31. Kg2 Rxd1 32. Nxd1 Qc6+ 33. Kh3 Qxe8 34. Ne3 Bg7 35. f4 Bxc3 36. Kh4 h5 37. h3 Qe7# 0-1

[Event "Enschede op-E U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "5"]
[White "Geene, Joris"]
[Black "De Groot, Jacob"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "1254"]
[BlackElo "1074"]
[PlyCount "64"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. d4 e6 5. f4 Nc6 6. Nf3 Bb4 7. a3 Bxc3+ 8. bxc3 Nb6 9. Bb5 Bd7 10. Be3 a6 11. Bd3 Na5 12. Qe2 Nac4 13. 0-0 Nxe3 14. Qxe3 Qe7 15. Nd2 0-0 16. c4 c6 17. Qh3 g6 18. Qh6 dxc4 19. Nxc4 Nxc4 20. Bxc4 b5 21. Bd3 c5 22. c3 c4 23. Be4 Rac8 24. Rf3 f5 25. Bb7 Rc7 26. Bxa6 Bc6 27. Rg3 Qg7 28. Qxg7+ Kxg7 29. a4 Rb8 30. axb5 Bxb5 31. Bxb5 Rxb5 32. h3 Rcb7 1/2-1/2

[Event "Enschede op-E U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "6"]
[White "Ingelaere, Arthur"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "1206"]
[BlackElo "1074"]
[PlyCount "37"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 Nc6 3. Bg2 e5 4. d3 Nf6 5. 0-0 Be6 6. b3 e4 7. dxe4 dxe4 8. Ng5 Bf5 9. c4 Be7 10. Nc3 Ng4 11. Ngxe4 Bxe4 12. Nxe4 0-0 13. Bb2 Re8 14. e3 Qxd1 15. Raxd1 Rad8 16. Nc3 Bf6 17. Na4 Bxb2 18. Nxb2 Na5 19. Bxb7 1-0

[Event "Enschede op-E U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "8"]
[White "Van Harten, Lucas"]
[Black "De Groot, Jacob"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "898"]
[BlackElo "1074"]
[PlyCount "76"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 Nf6 2. Nf3 Nc6 3. Nc3 d5 4. e5 Nd7 5. Qe2 Nb6 6. d4 Bg4 7. Be3 e6 8. h3 Bh5 9. Qd1 Be7 10. Be2 Qd7 11. 0-0 0-0-0 12. Bb5 a6 13. Ba4 Nxa4 14. Nxa4 Na7 15. c3 Rhf8 16. b4 Bxf3 17. Qxf3 Qxa4 18. Qd1 Qxd1 19. Rfxd1 f6 20. c4 fxe5 21. cxd5 exd5 22. dxe5 Nc6 23. Rab1 Nxe5 24. Rdc1 Nc4 25. Bd4 Bf6 26. Bc5 Rfe8 27. Re1 b6 28. Be3 Nxe3 29. Rxe3 Rxe3 30. fxe3 Re8 31. Rd1 Rxe3 32. Rxd5 Re5 33. Rd4 Re1+ 34. Kh2 Bxd4 35. a4 Rb1 36. Kg3 Kd7 37. Kg4 Ke6 38. Kf4 Rxb4 0-1

[Event "Enschede op-E U14"]
[Site "Enschede"]
[Date "2009.08.04"]
[Round "4"]
[White "De Groot, Jacob"]
[Black "Bhattacharjee, Sourav"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "1074"]
[BlackElo "1366"]
[PlyCount "69"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Bxc6 dxc6 5. Nxe5 Bd6 6. d4 Nxe4 7. Qf3 Nf6 8. 0-0 0-0 9. Nc3 Be6 10. Bf4 Nd5 11. Rfd1 Nxf4 12. Qxf4 f6 13. Qe3 Qe7 14. Nf3 Rfe8 15. d5 Bd7 16. Qxe7 Rxe7 17. h3 cxd5 18. Nxd5 Re2 19. Nxc7 Rxc2 20. Rxd6 Rxc7 21. Rad1 Bc6 22. Rc1 Rac8 23. Nd4 Rd7 24. Rxd7 Bxd7 25. Rd1 Be8 26. Nf5 Kf7 27. Nd6+ Ke6 28. Nxc8 Bh5 29. Rd6+ Ke5 30. g4 Bf7 31. Rd7 Be6 32. Re7 Kd5 33. Nxa7 Kd6 34. Rxb7 Bxa2 35. Rxg7 1-0

[Event "Enschede op-E U14"]
[Site "Enschede"]
[Date "2009.08.04"]
[Round "2"]
[White "Van Foreest, Jorden"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1446"]
[BlackElo "1074"]
[PlyCount "33"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. Nf3 Nc6 4. Nc3 Bg4 5. e3 e6 6. Bd3 Be7 7. Bd2 0-0 8. h3 Bxf3 9. Qxf3 Qd7 10. g4 Rad8 11. g5 Ne8 12. c5 Bxg5 13. Qh5 h6 14. h4 Be7 15. Rg1 Nf6 16. Qxh6 g6 17. Bxg6 1-0

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2009.04.10"]
[Round "1"]
[White "Van Foreest, Jorden"]
[Black "De Groot, Jacob"]
[Result "1-0"]
[ECO "C55"]
[PlyCount "99"]
[EventDate "2009.04.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. 0-0 Nxe4 5. Qe2 d5 6. Bb5 Bd6 7. d3 Nf6 8. Nxe5 Bxe5 9. Qxe5+ Qe7 10. Qxe7+ Kxe7 11. Re1+ Be6 12. Bg5 Nd4 13. Ba4 b5 14. Bb3 c5 15. c3 Nxb3 16. axb3 Rhe8 17. f4 Kf8 18. Nd2 c4 19. bxc4 bxc4 20. dxc4 dxc4 21. Bxf6 gxf6 22. Ne4 Kg7 23. Ng3 Kg6 24. h4 h5 25. Ra5 Bg4 26. Rxe8 Rxe8 27. Rxa7 Rd8 28. Ne4 Bf5 29. Re7 Bxe4 30. Rxe4 Rc8 31. Kf2 f5 32. Re5 Rd8 33. Ke2 f6 34. Rc5 Re8+ 35. Kf3 Re4 36. b4 cxb3 37. Rb5 Kf7 38. Rxb3 Ke7 39. Rb4 Rxb4 40. cxb4 Kd6 41. Ke3 Kc6 42. Kd4 Kb5 43. Kd5 Kxb4 44. Ke6 Kc4 45. Kxf5 Kd4 46. Kxf6 Ke4 47. Kg5 Kd5 48. f5 Ke5 49. f6 Ke6 50. Kg6 1-0

