[Event "NED-chT Promotion Liga 2b"]
[Site "Netherlands"]
[Date "2021.06.05"]
[Round "1.1"]
[White "Van Os, Marcel"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "C86"]
[WhiteElo "2079"]
[BlackElo "1895"]
[PlyCount "77"]
[EventDate "2021.06.05"]
[EventType "team-k.o."]
[EventRounds "2"]
[EventCountry "NED"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]
[WhiteTeam "Utrecht Oud Zuylen"]
[BlackTeam "Delft"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. c3 0-0 8. 0-0 d6 9. Rd1 Bg4 10. d4 Qc8 11. Bg5 Rb8 12. a3 h6 13. Bh4 Nh5 14. Bg3 Bf6 15. d5 Ne7 16. Nbd2 Ng6 17. Bc2 Bg5 18. b3 Nhf4 19. Qf1 f5 20. exf5 Rxf5 21. Be4 Nh5 22. h3 Nxg3 23. fxg3 Be3+ 24. Kh2 Rf6 25. Qd3 Bxd2 26. hxg4 Bxc3 27. Qxc3 Qxg4 28. Qd3 Ne7 29. Rac1 Rbf8 30. Rxc7 Nf5 31. Bxf5 Rxf5 32. Nh4 e4 33. Qc3 Rg5 34. Qe1 e3 35. Rd3 Qe4 36. Qxe3 Qxe3 37. Rxe3 Rxd5 38. Ng6 Rd8 39. Ne7+ 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.29"]
[Round "9"]
[White "Den Hartog, Marijn"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2227"]
[BlackElo "1684"]
[PlyCount "86"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 5. Nxe5 c6 6. Be2 Nd7 7. Nf3 N7f6 8. c4 Nb6 9. h3 g6 10. Nc3 Bg7 11. 0-0 0-0 12. Be3 Bf5 13. a4 Ne4 14. Qb3 Qc7 15. Nxe4 Bxe4 16. Rfd1 Rfd8 17. Rac1 Nd7 18. d5 c5 19. Nd2 Nf6 20. Nxe4 Nxe4 21. Bf3 Nd6 22. Qa3 Rac8 23. b4 b6 24. bxc5 bxc5 25. Bg4 f5 26. Be2 Ne4 27. Bf3 f4 28. Bxe4 fxe3 29. Qxe3 Bd4 30. Rxd4 cxd4 31. Qxd4 Qc5 32. Qe5 Rf8 33. Bf3 Qd6 34. Qc3 Qc5 35. Bg4 Qxf2+ 36. Kh1 Rc5 37. Be6+ Rf7 38. Rb1 Qf4 39. Qa1 Rxc4 40. Rf1 Rxa4 41. Rxf4 Rxa1+ 42. Kh2 Rf1 43. Rxf7 Rxf7 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.28"]
[Round "8"]
[White "Bosma, Jan"]
[Black "Hartevelt, Leendert"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1684"]
[BlackElo "1777"]
[PlyCount "89"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. Nd5 Bc5 6. d3 0-0 7. Nf3 h6 8. 0-0 d6 9. a3 a5 10. e3 Nxd5 11. cxd5 Ne7 12. d4 exd4 13. Nxd4 Ng6 14. b3 Re8 15. Bb2 Ne5 16. Qd2 Bd7 17. Qc3 f6 18. Kh1 Qc8 19. b4 Bb6 20. f4 Nf7 21. e4 Bh3 22. Bxh3 Qxh3 23. Ne6 axb4 24. axb4 Rxa1 25. Rxa1 Qg4 26. Qd3 h5 27. Kg2 h4 28. h3 Qxg3+ 29. Qxg3 hxg3 30. Kxg3 c6 31. Rc1 Nd8 32. f5 Kf7 33. Kf3 g6 34. Nxd8+ Bxd8 35. dxc6 bxc6 36. fxg6+ Kxg6 37. Rxc6 Be7 38. b5 Rb8 39. b6 Kf7 40. Kf4 Ke6 41. Bd4 Bd8 42. h4 f5 43. e5 Be7 44. exd6 Bxd6+ 45. Rxd6+ 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.26"]
[Round "5"]
[White "De Boer, Bas"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "D21"]
[WhiteElo "2107"]
[BlackElo "1684"]
[PlyCount "95"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 a6 3. c4 dxc4 4. a4 Nf6 5. e3 Bg4 6. Bxc4 e6 7. 0-0 c5 8. Nc3 Nbd7 9. Be2 Nb6 10. Qb3 Qc7 11. h3 Bh5 12. a5 Nbd5 13. Nxd5 exd5 14. dxc5 Bxc5 15. Bd2 0-0 16. Rac1 Qd6 17. Bc3 Ne4 18. Be5 Qe6 19. Rfd1 Rfd8 20. Bd4 Bxd4 21. Rxd4 Qd7 22. Rcd1 Nf6 23. Ne5 Qc7 24. Bxh5 Nxh5 25. Rxd5 Rxd5 26. Qxd5 Nf6 27. Qd6 Qxd6 28. Rxd6 Kf8 29. Rb6 Rb8 30. Rxf6 Re8 31. Rxf7+ Kg8 32. Rxb7 Rxe5 33. b4 Re6 34. Rb6 Re4 35. Kf1 Rc4 36. Ke2 Rc2+ 37. Kf3 Rb2 38. g4 g5 39. Ke4 Kf7 40. f4 gxf4 41. exf4 Re2+ 42. Kf5 Rb2 43. Rb7+ Kg8 44. Kf6 h5 45. g5 Rd2 46. Rb8+ Kh7 47. g6+ Kh6 48. Rh8# 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.26"]
[Round "6"]
[White "Elgersma, Simon"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B03"]
[WhiteElo "2189"]
[BlackElo "1684"]
[PlyCount "177"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 exd6 6. Nc3 Nc6 7. Be3 Be7 8. Bd3 Bf6 9. Nge2 Nb4 10. Bb1 0-0 11. b3 Bg4 12. a3 Nc6 13. f3 Bh5 14. 0-0 Re8 15. Bf2 Bg6 16. d5 Ne5 17. Bxg6 Nxg6 18. Ra2 Nd7 19. Ne4 Be5 20. Nd4 Nf6 21. Ng3 Qd7 22. Rd2 Bf4 23. Rd3 Re5 24. Nde2 Rae8 25. Kh1 Nh5 26. Nxh5 Rxh5 27. Ng3 Rhe5 28. Bd4 Bxg3 29. hxg3 Re2 30. Rd2 Rxd2 31. Qxd2 b6 32. Bc3 Qe7 33. Qd4 Qe5 34. Qxe5 dxe5 35. g4 f6 36. Re1 Kf7 37. Kg1 Ke7 38. g3 Kd6 39. Kf2 Nf8 40. b4 Nd7 41. Rh1 h6 42. f4 Re7 43. Kf3 b5 44. cxb5 Kxd5 45. Bd2 Nb6 46. Be3 Kc4 47. Rd1 e4+ 48. Ke2 Kxb5 49. Rc1 Nc4 50. Bc5 Nd6 51. Bxa7 Ka4 52. Bc5 Kxa3 53. b5+ Ka4 54. b6 Re8 55. bxc7 Nc8 56. Rb1 Ka5 57. Ke3 g6 58. Rb8 f5 59. gxf5 gxf5 60. Bd4 Rg8 61. Kf2 h5 62. Bf6 Ka6 63. Bd8 Nd6 64. c8Q+ Nxc8 65. Rxc8 Kb7 66. Rc7+ Kb8 67. Rf7 Rxd8 68. Rxf5 Kc7 69. Rxh5 Rd2+ 70. Ke3 Rd3+ 71. Kxe4 Rxg3 72. Rd5 Rg1 73. Ke5 Kc6 74. Rd2 Re1+ 75. Kf6 Rh1 76. f5 Rg1 77. Ke6 Re1+ 78. Kf7 Rf1 79. f6 Rf5 80. Ke6 Rf1 81. Rc2+ Kb6 82. Re2 Kc7 83. Ke7 Rd1 84. f7 Rd7+ 85. Kf6 Rd1 86. f8Q Rf1+ 87. Ke7 Rxf8 88. Rc2+ Kb6 89. Kxf8 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.25"]
[Round "4"]
[White "Bosma, Jan"]
[Black "De Boer, Sipke"]
[Result "1-0"]
[ECO "D76"]
[WhiteElo "1684"]
[BlackElo "1363"]
[PlyCount "101"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nf3 0-0 5. 0-0 Nc6 6. d4 d5 7. cxd5 Nxd5 8. Nc3 Nb6 9. e3 Bf5 10. a3 Qc8 11. Qe2 Bh3 12. Rd1 Bxg2 13. Kxg2 Rd8 14. Bd2 e5 15. dxe5 Nxe5 16. Nxe5 Bxe5 17. e4 Qe6 18. Bg5 Re8 19. f3 Bxc3 20. bxc3 Qe5 21. Qd2 f5 22. Bf4 Qe7 23. exf5 gxf5 24. Re1 Qf7 25. Be5 c6 26. Qg5+ Qg6 27. Qf4 Re6 28. Qd4 Rae8 29. f4 Qf7 30. Rad1 R6e7 31. Qf2 Nc4 32. Bd4 Nxa3 33. Rxe7 Qxe7 34. Bxa7 Nb5 35. Bd4 Nxd4 36. Rxd4 Qe2 37. Rd7 b5 38. Rc7 Qxf2+ 39. Kxf2 Re6 40. Kf3 h6 41. g4 fxg4+ 42. Kxg4 Kf8 43. Kf5 Rd6 44. Ke5 Rd5+ 45. Ke6 Rc5 46. f5 Rxc3 47. Rc8+ Kg7 48. f6+ Kg6 49. Rg8+ Kh7 50. f7 Re3+ 51. Kd6 1-0

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.24"]
[Round "3"]
[White "Bootsma, Nick"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B04"]
[WhiteElo "1528"]
[BlackElo "1684"]
[PlyCount "44"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 dxe5 5. Nxe5 c6 6. c4 Nb4 7. a3 Qxd4 8. Qe2 Nc2+ 9. Qxc2 Qxe5+ 10. Be2 Bf5 11. Qc3 Nd7 12. Qxe5 Nxe5 13. 0-0 g6 14. Bd2 Bg7 15. Bc3 0-0 16. Re1 Rad8 17. f4 Nd3 18. Bxd3 Rxd3 19. Rxe7 Rd1+ 20. Re1 Rxe1+ 21. Bxe1 Bxb2 22. Ra2 Bd4+ 0-1

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.24"]
[Round "2"]
[White "Bosma, Jan"]
[Black "Kevlishvili, Robby"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1684"]
[BlackElo "2414"]
[PlyCount "92"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. d3 0-0 9. a3 Be6 10. b4 f6 11. Bb2 a5 12. b5 Na7 13. d4 Nc4 14. Bc1 e4 15. Nxe4 Nxb5 16. a4 Nbd6 17. Nc5 Bd5 18. Qc2 b6 19. e4 Bc6 20. Ne6 Bxe4 21. Qe2 Qc8 22. Nxf8 Bxf8 23. Nd2 Nxd2 24. Bxd2 Bxg2 25. Kxg2 Qd7 26. Rfe1 Re8 27. Qd3 Rd8 28. Bf4 Nf7 29. Qc4 g5 30. Be3 Bd6 31. Rac1 h5 32. Qc6 Qc8 33. Qf3 Kg7 34. Rh1 h4 35. gxh4 g4 36. Qe2 Rh8 37. Rcg1 Rxh4 38. Kf1 Qf5 39. f4 Ng5 40. Qf2 Rh3 41. fxg5 Rf3 42. gxf6+ Kf7 43. Ke1 Bb4+ 44. Kf1 Rxf2+ 45. Bxf2 Qd3+ 46. Kg2 Qh3# 0-1

[Event "NED-ch U18/20"]
[Site "Assen"]
[Date "2017.04.23"]
[Round "1"]
[White "Bosma, Jan"]
[Black "Vereggen, Lars"]
[Result "0-1"]
[ECO "A27"]
[WhiteElo "1684"]
[BlackElo "2334"]
[PlyCount "60"]
[EventDate "2017.04.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nc6 3. Nc3 f5 4. Nf3 Nf6 5. d4 e4 6. Nh4 g6 7. Bg5 Be7 8. e3 d6 9. Be2 Kf7 10. Rb1 h6 11. Bxf6 Bxf6 12. Ng2 Ne7 13. f3 exf3 14. Bxf3 c6 15. 0-0 Kg7 16. Nf4 Bd7 17. b4 Qg8 18. Qe2 Be8 19. Rfc1 Bf7 20. Nd1 h5 21. h4 g5 22. hxg5 Bxg5 23. Nxh5+ Kf8 24. Nf4 Bxf4 25. exf4 Qxg3+ 26. Kf1 Rh2 27. Nf2 Ng6 28. Rb3 Nxf4 29. Qd2 Qh4 30. Re1 Bxc4+ 0-1

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.07"]
[Round "9"]
[White "Bosma, Jan"]
[Black "Pols, Arne"]
[Result "1/2-1/2"]
[ECO "C63"]
[WhiteElo "1556"]
[BlackElo "1904"]
[PlyCount "46"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Bxc6 dxc6 5. d4 fxe4 6. Nxe5 Nf6 7. Bg5 Bd6 8. Nc3 Bf5 9. Qe2 Qe7 10. Bxf6 Qxf6 11. Nxe4 Qe7 12. f4 0-0-0 13. 0-0-0 Rhf8 14. g3 Qe6 15. Nc3 Qh6 16. Rhe1 Rde8 17. Kb1 Qh3 18. Rd2 Be6 19. Qg2 Qh5 20. Rde2 Bb4 21. Qf3 Qf5 22. Qe4 Qh5 23. Qf3 Qf5 1/2-1/2

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.06"]
[Round "8"]
[White "Van der Noordaa, Daan"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "A03"]
[WhiteElo "1335"]
[BlackElo "1556"]
[PlyCount "61"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. f4 d5 2. b3 c5 3. Bb2 Nf6 4. Nf3 Bg4 5. e3 e6 6. Bd3 Nc6 7. a3 Bd6 8. 0-0 e5 9. fxe5 Bxe5 10. Bxe5 Nxe5 11. Be2 Ng6 12. Qe1 0-0 13. Bd3 Bxf3 14. Rxf3 Ne5 15. Rh3 Nxd3 16. cxd3 d4 17. e4 Nd7 18. Qg3 f5 19. a4 Qf6 20. Na3 f4 21. Qf2 Ne5 22. Rf1 g5 23. Nc4 Rae8 24. Nxe5 Rxe5 25. Qe2 Qf7 26. Qg4 Qxb3 27. Rh5 Qxd3 28. Rxg5+ Rxg5 29. Qxg5+ Kh8 30. Qe5+ Kg8 31. Qg5+ 1/2-1/2

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.05"]
[Round "7"]
[White "Bosma, Jan"]
[Black "Van Nimwegen, Martijn"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "1556"]
[BlackElo "1491"]
[PlyCount "60"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 Nf6 4. Bg2 Bc5 5. Nf3 0-0 6. a3 a5 7. 0-0 d6 8. d3 h6 9. Bd2 Be6 10. Na4 Ba7 11. b4 axb4 12. axb4 e4 13. Ne1 Bd4 14. Rc1 d5 15. c5 Be5 16. f4 exf3 17. Nxf3 Bg4 18. Nxe5 Nxe5 19. Bf3 Bxf3 20. exf3 Nxd3 21. Ra1 Ne5 22. Re1 Ng6 23. Bc3 Re8 24. Bb2 Rxe1+ 25. Qxe1 Qd7 26. Nc3 Rxa1 27. Qxa1 Qe8 28. Qd1 Qe3+ 29. Kg2 Ne5 30. Nb5 c6 1/2-1/2

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.04"]
[Round "6"]
[White "Van Doren, Bas"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1527"]
[BlackElo "1556"]
[PlyCount "137"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qa5 5. Bd2 e5 6. Nd5 Qd8 7. Nxf6+ Qxf6 8. dxe5 dxe5 9. Nf3 Qg6 10. f5 Qd6 11. Bc4 h6 12. Bc3 Nd7 13. Qxd6 Bxd6 14. 0-0-0 Bc7 15. g4 b5 16. Bb3 a5 17. a3 Ke7 18. g5 h5 19. Rhf1 Ke8 20. Bxf7+ Kxf7 21. g6+ Ke7 22. Ng5 Nf6 23. Nf7 Re8 24. Nxe5 Bxe5 25. Bxe5 Kf8 26. Bd6+ Kg8 27. e5 Ng4 28. f6 gxf6 29. exf6 Nxf6 30. Rxf6 Re6 31. Rxe6 Bxe6 32. Be5 Rf8 33. g7 Rf5 34. Rd8+ Kh7 35. Rh8+ Kg6 36. g8Q+ Bxg8 37. Rxg8+ Kf7 38. Rg7+ Kf8 39. Bc3 b4 40. axb4 axb4 41. Bd4 c5 42. Rd7 Rf1+ 43. Kd2 cxd4 44. Rxd4 Rf2+ 45. Kc1 b3 46. cxb3 Rxh2 47. b4 Rg2 48. Rh4 Rg4 49. Rxh5 Rxb4 50. Re5 Rg4 51. Kc2 Rg2+ 52. Kb3 Rg4 53. Ka3 Rg6 54. b4 Ra6+ 55. Kb3 Ra1 56. b5 Rb1+ 57. Ka4 Ra1+ 58. Kb4 Rb1+ 59. Ka5 Ra1+ 60. Kb6 Rh1 61. Kb7 Rh7+ 62. Ka6 Rh1 63. b6 Rh6 64. Ka7 Rh1 65. Ra5 Rh7+ 66. b7 Re7 67. Ka8 Re8+ 68. b8Q Rxb8+ 69. Kxb8 1-0

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.03"]
[Round "5"]
[White "Bosma, Jan"]
[Black "Ten Have, Dimitri"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "1556"]
[BlackElo "1365"]
[PlyCount "55"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 d6 5. h3 g6 6. d3 Bd7 7. Bg5 Nb8 8. Bc4 b5 9. Bb3 Bg7 10. Nc3 c6 11. Nh2 0-0 12. Ng4 Bxg4 13. Qxg4 h6 14. Bxe7 Qxe7 15. Qxg6 Nd7 16. a3 Nf6 17. Qg3 Kh7 18. Ne2 Rg8 19. f4 Bh8 20. Qf3 Rg6 21. fxe5 dxe5 22. Ng3 Rag8 23. Qf5 R8g7 24. Rf2 Kg8 25. Nh5 Nxh5 26. Qxh5 Qg5 27. Qxg5 Rxg5 28. Raf1 1-0

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.02"]
[Round "4"]
[White "Pols, Wiggert"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1940"]
[BlackElo "1556"]
[PlyCount "109"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 d5 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. exd5 exd5 7. Nf3 Nc6 8. 0-0 Nf6 9. Ne5 Qc7 10. Re1 Be7 11. Qe2 Nd4 12. Qd1 0-0 13. d3 Bd6 14. g4 g5 15. fxg5 Bxe5 16. gxf6 Bxh2+ 17. Kh1 Qg3 18. Re3 Qf2 19. Qe1 Qxe1+ 20. Rxe1 Nxc2 21. Bh6 Nxe1 22. Rxe1 Rfd8 23. Kxh2 d4 24. Ne4 Re8 25. Rf1 Re5 26. Nd6 Rae8 27. Nxe8 Rxe8 28. Rf5 b6 29. Rg5+ Kh8 30. Rd5 Kg8 31. Rd7 Ra8 32. Kg3 a6 33. Rb7 b5 34. Rc7 c4 35. dxc4 bxc4 36. Rxc4 Rd8 37. Rc6 d3 38. Rxa6 d2 39. Bxd2 h5 40. Bc3 Rd5 41. gxh5 Rg5+ 42. Kh4 Rc5 43. Ra8+ Kh7 44. Rf8 Rc7 45. a3 Rc4+ 46. Kg3 Rc7 47. Bb4 Kh6 48. Be7 Rc2 49. Rxf7 Rc4 50. Rg7 Kxh5 51. f7 Re4 52. f8Q Rg4+ 53. Kf3 Rf4+ 54. Kxf4 Kh6 55. Qh8# 1-0

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.05.01"]
[Round "3"]
[White "Bosma, Jan"]
[Black "Wagenvoorde, Guido"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1556"]
[BlackElo "1885"]
[PlyCount "148"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Nb6 6. Nf3 Nc6 7. 0-0 Be7 8. b3 0-0 9. Bb2 Be6 10. Rc1 f5 11. d3 a6 12. a3 Bf6 13. b4 Nd4 14. Nxd4 exd4 15. Na4 Nxa4 16. Qxa4 c6 17. Qc2 Bd5 18. Qc5 Bxg2 19. Kxg2 Qd7 20. Rc2 Rad8 21. Bc1 Rfe8 22. Re1 g5 23. f4 g4 24. Bb2 Bg7 25. Rc4 Qd5+ 26. Qxd5+ Rxd5 27. Kf2 h5 28. Rec1 Kf7 29. Rc5 Red8 30. Ke1 Ke6 31. Kd2 Bf8 32. R5c4 Bg7 33. Rc5 h4 34. Ke1 hxg3 35. hxg3 Rh8 36. Rxd5 Kxd5 37. Rc5+ Ke6 38. Rc4 Rh1+ 39. Kf2 Rb1 40. Bc1 Ra1 41. Rc2 Kd5 42. Ke1 Bf8 43. Kd2 b5 44. e3 dxe3+ 45. Kxe3 a5 46. bxa5 Bxa3 47. Bxa3 Rxa3 48. Rh2 Rxa5 49. Rh5 Ke6 50. Rh6+ Kd7 51. Kd4 b4 52. Kc4 Rb5 53. Rh7+ Kd6 54. Rh6+ Kc7 55. Rh7+ Kb6 56. Rh8 b3 57. Rb8+ Kc7 58. Rxb5 cxb5+ 59. Kxb3 Kd6 60. Kb4 Kc6 61. d4 Kd5 62. Kxb5 Kxd4 63. Kc6 Ke4 64. Kd6 Kf3 65. Ke5 Kxg3 66. Kxf5 Kh4 67. Ke6 g3 68. f5 g2 69. f6 g1Q 70. Kf7 Kh5 71. Kf8 Kg6 72. f7 Qf2 73. Kg8 Qxf7+ 74. Kh8 Qf8# 0-1

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.04.30"]
[Round "2"]
[White "De Boer, Sipke"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "E35"]
[WhiteElo "1442"]
[BlackElo "1556"]
[PlyCount "116"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. Nc3 Bb4 5. Bg5 Bb7 6. e3 0-0 7. Bd3 d5 8. cxd5 exd5 9. Qc2 h6 10. Bh4 Nbd7 11. 0-0 Be7 12. Rac1 Ne8 13. Bxe7 Qxe7 14. Ne2 Nd6 15. Qb3 c5 16. Bb5 Nxb5 17. Qxb5 c4 18. Nf4 Qd6 19. Qa4 a5 20. Nd2 b5 21. Qd1 b4 22. Nb1 Nf6 23. Re1 Ne4 24. f3 Ng5 25. a3 Ne6 26. Nh3 f5 27. g3 g5 28. f4 gxf4 29. Nxf4 Nxf4 30. gxf4 Kh7 31. Kf2 Rg8 32. Qh5 Qg6 33. Qxg6+ Rxg6 34. Rg1 Rag8 35. Rxg6 Rxg6 36. Rg1 Rxg1 37. Kxg1 Bc6 38. Kf2 Ba4 39. axb4 axb4 40. Ke2 Bc2 41. Nd2 Kg6 42. Kf2 Kh5 43. Kg3 c3 44. bxc3 bxc3 45. Nf3 Be4 46. Ne1 c2 47. Nxc2 Bxc2 48. Kh3 Bd1 49. Kg3 Bg4 50. h3 Bd1 51. Kf2 Kh4 52. Kg2 Bc2 53. Kh2 Be4 54. Kg1 Kxh3 55. Kf2 Kg4 56. Kg1 h5 57. Kh2 h4 58. Kg1 Kg3 0-1

[Event "NED-ch U16"]
[Site "Rotterdam"]
[Date "2016.04.29"]
[Round "1"]
[White "Bosma, Jan"]
[Black "Nguyen, Kevin"]
[Result "0-1"]
[ECO "E65"]
[WhiteElo "1556"]
[BlackElo "2049"]
[PlyCount "66"]
[EventDate "2016.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. Nf3 d6 6. 0-0 c5 7. e3 Nc6 8. d4 Bd7 9. b3 a6 10. Ba3 Qa5 11. Bb2 b5 12. d5 Na7 13. Qd2 bxc4 14. bxc4 Rab8 15. Rfc1 Ne4 16. Qc2 Rxb2 17. Qxb2 Bxc3 18. Qb7 Bxa1 19. Rxa1 Qc3 20. Rf1 Bg4 21. Qxa7 Bxf3 22. Bxf3 Nd2 23. Be2 Nxf1 24. Bxf1 Qf6 25. Qxa6 Rb8 26. Qa5 Rb1 27. Kg2 Rb2 28. Qe1 Rxa2 29. Be2 Qb2 30. Bd1 Qc1 31. Kf1 Ra1 32. Ke2 Qxc4+ 33. Kf3 Qd3 0-1

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.05.04"]
[Round "9"]
[White "Bosma, Jan"]
[Black "Bekedam, Tyro"]
[Result "1/2-1/2"]
[ECO "E72"]
[BlackElo "1821"]
[PlyCount "84"]
[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. c4 Nf6 2. Nc3 g6 3. d4 Bg7 4. g3 0-0 5. Bg2 d6 6. e4 Nc6 7. Nge2 e5 8. d5 Ne7 9. 0-0 Nh5 10. f4 f5 11. fxe5 Bxe5 12. Bh6 Ng7 13. Qd2 Bd7 14. Rf3 fxe4 15. Rxf8+ Qxf8 16. Rf1 Qe8 17. Nxe4 Nef5 18. Bf4 Qe7 19. g4 Bxf4 20. Qxf4 Nh4 21. Nf6+ Kh8 22. Nxd7 Nxg2 23. Kxg2 Qxe2+ 24. Rf2 Qe7 25. Qf8+ Rxf8 26. Rxf8+ Qxf8 27. Nxf8 Kg8 28. Nd7 Kf7 29. g5 Nh5 30. c5 Nf4+ 31. Kf3 Nxd5 32. cxd6 cxd6 33. Ke4 Nb6 34. Nf6 h6 35. h4 hxg5 36. hxg5 Ke6 37. b3 Nd7 38. Nd5 Nc5+ 39. Kd4 Nd3 40. Nc7+ Kd7 41. Nd5 Nf2 42. Nf4 Kc6 1/2-1/2

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.05.03"]
[Round "8"]
[White "Janse, Alexander"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "52"]
[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. f4 Bg7 5. Nf3 0-0 6. Be2 Nbd7 7. e5 Ne8 8. h4 h5 9. Be3 Nb6 10. Qd2 Bf5 11. 0-0-0 d5 12. Nh2 Qd7 13. Rdg1 Nc4 14. Bxc4 dxc4 15. Qe2 b5 16. g4 hxg4 17. Nxg4 b4 18. Nd1 b3 19. axb3 cxb3 20. c3 a5 21. h5 Bxg4 22. Rxg4 Qf5 23. h6 Bh8 24. h7+ Kg7 25. Qh2 f6 26. e6 Qxe6 1-0

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.05.02"]
[Round "7"]
[White "Bosma, Jan"]
[Black "Kanters, Cor"]
[Result "1-0"]
[ECO "C41"]
[BlackElo "1674"]
[PlyCount "43"]
[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 d6 3. c3 Bg4 4. d4 Nd7 5. Be2 Ngf6 6. Bg5 Be7 7. Nbd2 Bxf3 8. Bxf3 Nd5 9. Bxe7 Nxe7 10. 0-0 0-0 11. Re1 Ng6 12. g3 Rb8 13. b4 a6 14. a4 Qg5 15. Bg2 f5 16. exf5 Qxf5 17. Qf3 Qc2 18. Qe3 c6 19. Be4 exd4 20. Qxd4 Qb2 21. Reb1 Nf4 22. gxf4 1-0

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.05.01"]
[Round "6"]
[White "Kaiser, Jakob"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "A25"]
[PlyCount "109"]
[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. c4 e5 2. g3 Nc6 3. Bg2 Nf6 4. Nc3 Bc5 5. e3 d6 6. Nge2 0-0 7. 0-0 Bg4 8. h3 Bd7 9. a3 a5 10. Rb1 Qc8 11. Kh2 Bf5 12. d3 Re8 13. e4 Bd7 14. f4 Nd4 15. g4 Kh8 16. fxe5 dxe5 17. g5 Ng8 18. b4 Be7 19. Rxf7 Be6 20. Rf1 Qd8 21. Nd5 Bxd5 22. exd5 Bxg5 23. Nxd4 exd4 24. Bxg5 Qxg5 25. Qg4 Qxg4 26. hxg4 axb4 27. Rxb4 Rxa3 28. Be4 b6 29. g5 g6 30. d6 cxd6 31. Rxb6 Ra5 32. Bd5 Ra3 33. Rf3 Ne7 34. Rxd6 Nf5 35. Re6 Rxe6 36. Bxe6 Kg7 37. Bxf5 gxf5 38. Kg3 Kg6 39. Kf4 Ra5 40. Rh3 Ra3 41. c5 Rc3 42. c6 Rc5 43. Rh6+ Kg7 44. Rd6 Kf8 45. Rxd4 Rxc6 46. Kxf5 Ke7 47. Rh4 Rc5+ 48. Kf4 Kf7 49. Rxh7+ Kg6 50. Rh6+ Kg7 51. d4 Rd5 52. Ra6 Rxd4+ 53. Kg3 Rd1 54. Kf2 Rd5 55. Ra1 1/2-1/2

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.04.30"]
[Round "5"]
[White "Bourgonjen, Ruben"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "A03"]
[PlyCount "32"]
[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. f4 d5 2. Nf3 Nf6 3. b3 c5 4. Bb2 e6 5. e3 a6 6. Be2 Be7 7. 0-0 0-0 8. d3 Nc6 9. Nbd2 Ng4 10. Qc1 Nxe3 11. Re1 Bd6 12. g3 d4 13. Ne4 f5 14. Nxd6 Qxd6 15. c4 Nb4 16. Qd2 Nbc2 0-1

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.04.29"]
[Round "4"]
[White "Bosma, Jan"]
[Black "Loutragotis, Dimitrios"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1317"]
[PlyCount "50"]
[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. exd5 exd5 4. Nf3 Bd6 5. Be2 Nf6 6. 0-0 0-0 7. Be3 Re8 8. c3 Nbd7 9. h3 Nf8 10. Bd3 Ne4 11. Nbd2 Ng6 12. Qb3 Bf4 13. Rae1 Bf5 14. Bxf4 Nxf4 15. Bxe4 dxe4 16. Ne5 Rxe5 17. dxe5 Qg5 18. g3 Nxh3+ 19. Kg2 Qxd2 20. Qxb7 Rf8 21. Qxc7 Qg5 22. Rh1 Qg4 23. Qxa7 Qf3+ 24. Kh2 Nxf2 25. Qe3 Ng4+ 0-1

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.04.28"]
[Round "3"]
[White "Kouwenhoven, Derk"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "100"]
[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. Be3 Bg7 5. f4 0-0 6. Be2 c6 7. Nf3 d5 8. e5 Ne8 9. 0-0 Bf5 10. Nd2 h5 11. h3 Qd7 12. Nb3 b6 13. Bf3 a5 14. Na4 Qb7 15. g4 hxg4 16. hxg4 Bd7 17. Bg2 f5 18. g5 Kf7 19. Rc1 e6 20. Rf3 Rh8 21. Rh3 Rxh3 22. Bxh3 c5 23. Nc3 c4 24. Nd2 b5 25. Bg2 b4 26. Ncb1 Bb5 27. c3 Nc6 28. b3 Qa6 29. cxb4 axb4 30. bxc4 dxc4 31. d5 c3 32. Nb3 Rd8 33. dxe6+ Kg8 34. Qc2 Bd3 35. Qf2 c2 36. N1d2 Ne7 37. Bc5 Qxe6 38. Bxb4 Nd5 39. Qd4 Be4 40. Nxe4 fxe4 41. Ba5 Rc8 42. Nc5 Qc6 43. Rxc2 Bf8 44. Nd7 Qxc2 45. Qxd5+ Kg7 46. Nxf8 Qc1+ 47. Bf1 Qe3+ 48. Kh1 Qf3+ 49. Kg1 Qg4+ 50. Kh1 Qf3+ 1/2-1/2

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.04.27"]
[Round "2"]
[White "Bosma, Jan"]
[Black "Bhattacharjee, Sourav"]
[Result "1/2-1/2"]
[ECO "C89"]
[BlackElo "1924"]
[PlyCount "100"]
[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 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re4 Bf5 14. Bxd5 cxd5 15. Re3 Qh4 16. g3 Qh3 17. Qf1 Qh5 18. Qe2 Bg4 19. f3 Bd7 20. Nd2 Rae8 21. Nf1 f5 22. Qf2 Rxe3 23. Bxe3 f4 24. gxf4 Bxf4 25. Bxf4 Rxf4 26. Nd2 Rf8 27. Qg3 Qh6 28. Qf2 Qg6+ 29. Qg2 Qd3 30. Re1 Rf6 31. Qe2 Qg6+ 32. Kh1 Re6 33. Qf2 Qc2 34. Rxe6 Bxe6 35. Qe3 Bf7 36. Qf4 h6 37. Nb3 Qxb2 38. Qd2 Qb1+ 39. Kg2 Qg6+ 40. Kf2 Qd6 41. Kg2 Bh5 42. Nc5 a5 43. Qe2 Qg6+ 44. Kf2 Qb1 45. Ne6 Qh1 46. Ke3 Qg1+ 47. Qf2 Qc1+ 48. Qd2 Qa3 49. Nf4 Bf7 50. Kf2 b4 1/2-1/2

[Event "NED-ch U15"]
[Site "Rotterdam"]
[Date "2014.04.26"]
[Round "1"]
[White "Bosma, Jan"]
[Black "Beukema, Jasper"]
[Result "1/2-1/2"]
[ECO "B25"]
[BlackElo "1844"]
[PlyCount "89"]
[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. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e6 7. Be3 Nge7 8. Nf3 Nd4 9. 0-0 0-0 10. Rb1 a6 11. Ne2 Nec6 12. c3 Nxf3+ 13. Bxf3 Rb8 14. a4 b5 15. axb5 axb5 16. d4 c4 17. Qe1 d5 18. e5 b4 19. g4 bxc3 20. bxc3 Bd7 21. Qg3 Ne7 22. h4 Rxb1 23. Rxb1 h5 24. Kf2 hxg4 25. Bxg4 Ba4 26. Rc1 Kh7 27. h5 gxh5 28. Qh4 Rh8 29. Qxh5+ Kg8 30. Qg5 Nc6 31. Qxd8+ Nxd8 32. f5 Bh6 33. Bxh6 Rxh6 34. Ra1 Bc6 35. Nf4 Kf8 36. Ra6 Ke7 37. fxe6 fxe6 38. Kg3 Kd7 39. Ra7+ Ke8 40. Bh5+ Kf8 41. Ng6+ Kg8 42. Ne7+ Kf8 43. Ng6+ Kg8 44. Ne7+ Kf8 45. Ng6+ 1/2-1/2

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.05"]
[Round "9"]
[White "Bosma, Jan"]
[Black "Vandeputte, Samuel"]
[Result "1/2-1/2"]
[ECO "B25"]
[BlackElo "1416"]
[PlyCount "94"]
[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. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. f4 d6 7. Nf3 Nge7 8. 0-0 0-0 9. Be3 Qb6 10. Rb1 Bd7 11. Qd2 a5 12. Rfd1 Rac8 13. d4 cxd4 14. Nxd4 Bxd4 15. Bxd4 Nxd4 16. Qxd4 Rc6 17. e5 Qxd4+ 18. Rxd4 d5 19. Ne4 Rc7 20. Nf6+ Kg7 21. c4 Bc6 22. cxd5 exd5 23. Rc1 Rd8 24. Bxd5 Nxd5 25. Rxd5 Bxd5 26. Rxc7 Bxa2 27. Rxb7 a4 28. Kg2 Bd5+ 29. Nxd5 Rxd5 30. Ra7 Rd2+ 31. Kh3 Rxb2 32. Rxa4 Re2 33. Ra7 h5 34. Rb7 Kf8 35. Rb1 Ke7 36. Rg1 Ke6 37. Rg2 Re3 38. Kh4 Kf5 39. Ra2 Re4 40. Ra6 g5+ 41. Kxh5 gxf4 42. gxf4 Rxf4 43. Rf6+ Kxe5 44. Rxf4 Kxf4 45. h4 Kg3 46. Kg5 f6+ 47. Kxf6 Kxh4 1/2-1/2

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.04"]
[Round "8"]
[White "Kuiper, Adrian"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "E61"]
[PlyCount "181"]
[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 d6 2. c4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bg5 c6 6. e4 Qa5 7. Qd2 Bg4 8. Be2 Nbd7 9. 0-0 0-0 10. Rfe1 Rad8 11. a3 Qc7 12. Rac1 e5 13. d5 c5 14. Nb5 Qb8 15. Nc3 Qc7 16. h3 Bxf3 17. Bxf3 a6 18. Be2 Rb8 19. b4 Rfe8 20. b5 a5 21. Qe3 Rf8 22. f4 b6 23. Qg3 Rbe8 24. Bf3 Qb8 25. Nd1 Qc7 26. Nf2 h6 27. Bxf6 Nxf6 28. Nd3 Kh7 29. fxe5 dxe5 30. Nf2 h5 31. Rcd1 Qd6 32. Qh2 Rh8 33. h4 Bh6 34. Nh3 Kg7 35. Qg3 Kh7 36. Rf1 Ref8 37. Rde1 Kg7 38. Ng5 Bxg5 39. Qxg5 Nh7 40. Qg3 Nf6 41. Bd1 Re8 42. Bc2 Re7 43. Rf3 Rf8 44. Ref1 Ng4 45. Bd3 Qd7 46. Be2 Qd6 47. Rd3 Nf6 48. Re3 Rd7 49. Rf5 Re7 50. Qg5 Nh7 51. Qg3 Nf6 52. Rf1 Rd7 53. Qh3 Re7 54. g4 hxg4 55. Bxg4 Nxg4 56. Qxg4 Qd7 57. Qg5 f6 58. Qg3 Rh8 59. Ref3 Rf7 60. R1f2 Rg8 61. h5 g5 62. Rf5 Qd6 63. Qg4 Kh6 64. Qf3 Rgf8 65. Qh3 Qd8 66. R5f3 Qd6 67. Qf5 Rg7 68. Qxf6+ Rxf6 69. Rxf6+ Qxf6 70. Rxf6+ Kxh5 71. Rxb6 Rf7 72. Re6 Kg4 73. Rxe5 Rf3 74. d6 Rxa3 75. d7 Ra1+ 76. Kf2 Ra2+ 77. Ke3 Ra3+ 78. Kd2 Ra2+ 79. Kc3 Ra3+ 80. Kb2 Rd3 81. Rd5 Rxd5 82. exd5 Kf3 83. d8Q g4 84. Qf6+ Kg2 85. Qf4 g3 86. Qxg3+ Kh1 87. Kc2 a4 88. Kd2 a3 89. Ke2 a2 90. Kf2 a1Q 91. Qg2# 1-0

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.05.03"]
[Round "7"]
[White "Bosma, Jan"]
[Black "Yang, Wang"]
[Result "0-1"]
[ECO "B23"]
[PlyCount "136"]
[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. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. d3 e6 6. f4 Ne7 7. Be3 Qc7 8. Nf3 d5 9. exd5 exd5 10. d4 c4 11. 0-0 g6 12. Ne5 Bg7 13. Qf3 0-0 14. Bh3 f5 15. Kh1 Kh8 16. Rg1 Nbc6 17. a3 Nxe5 18. fxe5 Bxe5 19. Bg2 Bf6 20. Bf4 Qd7 21. Qe3 Ng8 22. Be5 Rae8 23. Qf4 Bxe5 24. dxe5 Qe6 25. Rge1 Ne7 26. Rad1 Rd8 27. Rd4 Rd7 28. Bf3 Kg7 29. h4 h6 30. g4 fxg4 31. Qxg4 Qxg4 32. Bxg4 Nf5 33. Bxf5 Rxf5 34. Kg2 Re7 35. e6 Kf6 36. Kg3 Rxe6 37. Rxe6+ Kxe6 38. Rg4 Kf6 39. Ne2 g5 40. Nd4 Re5 41. Kf3 Bc8 42. hxg5+ hxg5 43. Rg1 g4+ 44. Kf2 Rh5 45. Re1 Bd7 46. Kg3 Rh3+ 47. Kg2 Rh7 48. Kg3 Rh8 49. Re2 a5 50. c3 Rh3+ 51. Kg2 Rd3 52. Kf2 b4 53. axb4 axb4 54. Re3 g3+ 55. Kf3 Bg4+ 56. Kxg3 Rxe3+ 57. Kxg4 Re4+ 58. Kf3 Rxd4 59. cxd4 c3 60. bxc3 b3 61. Ke3 b2 62. Ke2 b1Q 63. Kd2 Qe4 64. Kc1 Qg2 65. c4 dxc4 66. d5 c3 67. d6 Qd2+ 68. Kb1 Qb2# 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.30"]
[Round "4"]
[White "Bosma, Jan"]
[Black "Mesman, Edwyn"]
[Result "1-0"]
[ECO "B08"]
[BlackElo "1849"]
[PlyCount "39"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bg5 c6 6. Bc4 Qa5 7. 0-0 Bg4 8. Be3 Nbd7 9. h3 Bxf3 10. Qxf3 0-0 11. Rad1 Rac8 12. Rfe1 a6 13. Bf4 Nh5 14. Qe3 Nxf4 15. Qxf4 Bxd4 16. Rxd4 e5 17. Qg5 h6 18. Qxg6+ Kh8 19. Qxh6+ Kg8 20. Rxd6 1-0

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.29"]
[Round "3"]
[White "Baselmans, Sam"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "E92"]
[PlyCount "72"]
[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 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e4 0-0 6. Be2 e5 7. d5 Bg4 8. h3 Bxf3 9. Bxf3 Nbd7 10. h4 h6 11. g4 Nh7 12. Be3 f6 13. Qd2 g5 14. 0-0-0 Nb6 15. b3 a5 16. Bxb6 cxb6 17. Kb2 Qd7 18. Nb5 a4 19. Qb4 axb3 20. axb3 Rfd8 21. h5 Bf8 22. Ra1 Be7 23. Ra7 Rxa7 24. Nxa7 Qc7 25. Ra1 Nf8 26. Kc3 Nd7 27. Nb5 Qb8 28. Kb2 Nc5 29. Qc3 Kf8 30. b4 Na6 31. Be2 Nc7 32. Nxc7 Qxc7 33. Qf3 Qd7 34. Kb3 Kg7 35. Ra2 Rc8 36. Bd3 Rd8 1/2-1/2

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.28"]
[Round "2"]
[White "Bosma, Jan"]
[Black "De Feijter, Bas"]
[Result "0-1"]
[ECO "B25"]
[BlackElo "1769"]
[PlyCount "160"]
[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. Nc3 e6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. Be3 d6 7. f4 Nge7 8. Nf3 Nd4 9. 0-0 0-0 10. e5 Nef5 11. Bf2 Nxf3+ 12. Qxf3 Nd4 13. Qd1 dxe5 14. fxe5 Bxe5 15. Ne4 f5 16. Nxc5 Qc7 17. Nb3 Nxb3 18. axb3 Bxb2 19. Ra2 Bg7 20. Qf3 Qd6 21. Rxa7 Rxa7 22. Bxa7 b6 23. Qc6 Bd4+ 24. Kh1 Qd7 25. Qxd7 Bxd7 26. Rf4 e5 27. Rf1 Rc8 28. Rc1 Bb2 29. Rb1 Bd4 30. Rc1 Kf7 31. c4 Ke6 32. b4 Kd6 33. Bb7 Bc6+ 34. Bxc6 Kxc6 35. c5 bxc5 36. Bxc5 Kd5 37. Kg2 Rc6 38. Kf3 Bxc5 39. bxc5 Rxc5 40. Ra1 Rc3 41. Ke2 Rc2+ 42. Ke3 Rxh2 43. Ra5+ Ke6 44. Ra6+ Kf7 45. Ra7+ Kf6 46. Ra6+ Kg7 47. Ra7+ Kh6 48. Ra5 Rh3 49. Kf3 f4 50. Rxe5 Rxg3+ 51. Kxf4 Rxd3 52. Re1 Rd4+ 53. Ke5 Rd8 54. Kf6 Rf8+ 55. Ke7 Rf2 56. Rh1+ Kg7 57. Ke6 g5 58. Ra1 h5 59. Ra5 Kg6 60. Ra8 Re2+ 61. Kd5 Kf5 62. Rf8+ Kg4 63. Rf1 h4 64. Rg1+ Kh5 65. Rf1 h3 66. Kd4 g4 67. Kd3 Re8 68. Rf5+ Kh4 69. Rf2 Kg3 70. Ra2 h2 71. Ra1 Kg2 72. Ra2+ Kh3 73. Ra7 h1Q 74. Rh7+ Kg2 75. Rg7 Qd1+ 76. Kc3 Rc8+ 77. Kb2 Qc2+ 78. Ka3 Ra8+ 79. Kb4 Rb8+ 80. Ka3 Qb3# 0-1

[Event "NED-ch U15"]
[Site "Sneek"]
[Date "2013.04.27"]
[Round "1"]
[White "Roesink, Myron"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B08"]
[PlyCount "99"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bg5 0-0 6. Qd2 Nbd7 7. 0-0-0 c6 8. e5 Ne8 9. h4 f6 10. Bh6 Qa5 11. h5 g5 12. Bxg7 Nxg7 13. h6 Ne6 14. exd6 exd6 15. Qe3 Nb6 16. Bd3 Rf7 17. d5 Nxd5 18. Nxd5 cxd5 19. Nd4 Qb6 20. Rhe1 Qxd4 21. Bxh7+ Kxh7 22. Rxd4 Nxd4 23. Qe8 Rc7 24. Re7+ Rxe7 25. Qxe7+ Kxh6 26. Qxf6+ Kh5 27. Qxd4 Be6 28. Qg7 Re8 29. Qxb7 Bf5 30. Qxa7 Re1+ 31. Kd2 Rg1 32. Qf7+ Kh4 33. Qxf5 Rxg2 34. a4 g4 35. a5 g3 36. Qf4+ Kh3 37. Qxg3+ Rxg3 38. fxg3 Kxg3 39. a6 Kf4 40. a7 Ke4 41. a8Q Ke5 42. Qe8+ Kf6 43. Ke3 d4+ 44. Ke4 d5+ 45. Kxd5 Kf5 46. Qf7+ Kg4 47. Ke4 d3 48. Qg6+ Kh3 49. Kf3 dxc2 50. Qg3# 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.19"]
[Round "8"]
[White "Bosma, Jan"]
[Black "Titus, Branco"]
[Result "1/2-1/2"]
[ECO "A29"]
[PlyCount "93"]
[EventDate "2012.05.17"]
[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 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 d5 5. cxd5 Nxd5 6. Bg2 Be6 7. 0-0 Be7 8. b3 Qd7 9. Bb2 0-0-0 10. Nxd5 Bxd5 11. d3 Qd6 12. Rc1 Rhf8 13. Qc2 Nd4 14. Bxd4 exd4 15. Nxd4 Bg5 16. e3 Bxg2 17. Kxg2 Rd7 18. Qc5 Qxc5 19. Rxc5 Bf6 20. Rc4 Bxd4 21. exd4 Rfd8 22. Rfc1 c6 23. Re1 Rxd4 24. Rxd4 Rxd4 25. Re7 Rd7 26. Re3 Kc7 27. f4 Kb6 28. Kf3 Kb5 29. a3 a5 30. Ke2 a4 31. b4 b6 32. Re8 Rb7 33. Rh8 h6 34. Rh7 f6 35. g4 c5 36. bxc5 bxc5 37. g5 fxg5 38. fxg5 hxg5 39. Rh5 Re7+ 40. Kd2 Rf7 41. Rxg5 Rf2+ 42. Kc3 Rxh2 43. Rxg7 Ra2 44. Rd7 Rxa3+ 45. Kb2 Rb3+ 46. Ka2 Rb4 47. Ka3 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.19"]
[Round "9"]
[White "Hoeneveld, Maarten"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "118"]
[EventDate "2012.05.17"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Qd2 c6 6. 0-0-0 b5 7. Bh6 0-0 8. Bxg7 Kxg7 9. h4 b4 10. Nce2 Nxe4 11. Qf4 Nf6 12. f3 Nd5 13. Qd2 Qa5 14. Kb1 Qb6 15. g4 h6 16. h5 g5 17. Ka1 a5 18. f4 gxf4 19. Nxf4 Bxg4 20. Qg2 f5 21. Nxd5 cxd5 22. Be2 Kf7 23. Bxg4 fxg4 24. Qxg4 Ke8 25. Qg6+ Kd7 26. Qxh6 Qxd4 27. Ne2 Qh8 28. Qxh8 Rxh8 29. h6 Rh7 30. Rdg1 Nc6 31. Rg7 Rah8 32. Ng3 Rxh6 33. Rxh6 Rxh6 34. c3 Re6 35. a3 b3 36. Ne2 Rxe2 37. Rg1 d4 38. cxd4 Nxd4 39. Kb1 Nc2 40. Kc1 Re1+ 41. Rxe1 Nxe1 42. Kd1 Nf3 43. Ke2 Ne5 44. Kd2 Kc6 45. Kc3 a4 46. Kd2 Kc5 47. Kd1 Nd3 48. Kd2 Nxb2 49. Kc3 Nc4 50. Kd3 Nxa3 51. Kc3 e5 52. Kb2 Nc4+ 53. Kb1 e4 54. Kc1 e3 55. Kd1 b2 56. Kc2 e2 57. Kd3 b1Q+ 58. Kxe2 Qb3 59. Ke1 Qc2 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.19"]
[Round "7"]
[White "Steunenberg, Renso"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "112"]
[EventDate "2012.05.17"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. d4 Bg7 5. Be2 0-0 6. 0-0 Nbd7 7. a4 c6 8. a5 Qc7 9. Bf4 e5 10. dxe5 dxe5 11. Bg5 Nc5 12. Bxf6 Bxf6 13. b4 Ne6 14. g3 Nd4 15. Bd3 Bg4 16. Be2 Rad8 17. Nxd4 Bxe2 18. Ncxe2 exd4 19. Rb1 Rfe8 20. f3 c5 21. bxc5 Qxc5 22. Kg2 Qxa5 23. Rxb7 Qa6 24. Rb3 Qc6 25. Rd3 Qc5 26. Nf4 Rc8 27. Nd5 Bg7 28. c3 dxc3 29. Qc2 Rb8 30. Kh1 Rb2 31. Qc1 c2 32. Kg2 Qc4 33. Rd2 Rb1 34. Rxc2 Rxc1 35. Rxc4 Rxc4 36. Rb1 Rc2+ 37. Kh3 Rcc8 38. Rb7 Kf8 39. Rxa7 h5 40. Nb6 Rcd8 41. Nd5 Ra8 42. Rb7 Ra2 43. Nb6 Bd4 44. Nd7+ Kg7 45. g4 Bg1 46. gxh5 Rxh2+ 47. Kg3 Rxh5 48. Kg4 Reh8 49. f4 f5+ 50. exf5 gxf5+ 51. Kg3 Kh6 52. Rb6+ Kg7 53. Rb7 Kh6 54. Rb6+ Kh7 55. Nf6+ Kg6 56. Nxh5+ Kxh5 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.18"]
[Round "4"]
[White "Bekedam, Tyro"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "97"]
[EventDate "2012.05.17"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. d4 Bg7 5. Be2 0-0 6. 0-0 c6 7. Be3 Nbd7 8. Qd2 Qc7 9. Rad1 b5 10. a3 Bb7 11. Bh6 Rad8 12. Bxg7 Kxg7 13. Rfe1 e5 14. dxe5 Nxe5 15. Nxe5 dxe5 16. Qe3 a6 17. f3 Nd7 18. Rd2 Nb6 19. Red1 Rd7 20. Rxd7 Nxd7 21. a4 Nb6 22. axb5 cxb5 23. Qd2 Rc8 24. Qd6 Qxd6 25. Rxd6 Rc6 26. Rxc6 Bxc6 27. b3 b4 28. Nd1 a5 29. Kf2 f5 30. Ke3 f4+ 31. Kd2 Kf6 32. c3 bxc3+ 33. Kxc3 a4 34. bxa4 Nxa4+ 35. Kb4 Ke6 36. Nc3 Nxc3 37. Kxc3 g5 38. Kb4 g4 39. Kc5 Ba8 40. Kb6 g3 41. h3 Kd6 42. Bf1 Bc6 43. Be2 Be8 44. Bb5 Bf7 45. Bd3 Be6 46. Bf1 Bd7 47. h4 h6 48. Bb5 Be6 49. Bd3 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.18"]
[Round "6"]
[White "Bosma, Jan"]
[Black "Pannebakker, Joost Jan"]
[Result "1/2-1/2"]
[ECO "D94"]
[PlyCount "47"]
[EventDate "2012.05.17"]
[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 g6 3. d4 Bg7 4. Nf3 d5 5. e3 0-0 6. cxd5 Nxd5 7. Bc4 Nb6 8. Bb3 Nc6 9. 0-0 Bf5 10. Re1 e6 11. h3 e5 12. d5 Na5 13. e4 Bd7 14. Bg5 Bf6 15. Be3 Nbc4 16. Bc5 Be7 17. Qe2 Bxc5 18. Bxc4 Nxc4 19. Qxc4 Qe7 20. Rac1 Bd6 21. Nb5 Bxb5 22. Qxb5 b6 23. Qd3 a5 24. Qe3 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.18"]
[Round "5"]
[White "Dubbeldam, Bart"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B08"]
[PlyCount "100"]
[EventDate "2012.05.17"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Bg5 c6 6. Bc4 b5 7. Bb3 0-0 8. 0-0 Bb7 9. e5 Ne8 10. e6 f6 11. Bf4 Nc7 12. Ne4 d5 13. Nc5 Bc8 14. Re1 Nba6 15. Nxa6 Nxa6 16. Qd2 Nc7 17. Bxc7 Qxc7 18. Qb4 a5 19. Qc5 Qd6 20. Qxd6 exd6 21. e7 Re8 22. a4 b4 23. Re2 Ra7 24. Rae1 Kf7 25. c3 Raxe7 26. Rxe7+ Rxe7 27. Rxe7+ Kxe7 28. Kf1 Bb7 29. Nd2 bxc3 30. bxc3 c5 31. dxc5 dxc5 32. c4 d4 33. Bc2 Ba6 34. Bd3 Kd6 35. Nb3 Bc8 36. Nxa5 Bd7 37. Bc2 Bf8 38. Nb3 Bxa4 39. Nxd4 cxd4 40. Bxa4 Kc5 41. Bb5 Kb4 42. Ke1 Kc3 43. Kd1 Bc5 44. h3 g5 45. g4 h6 46. f3 Kd3 47. Ba6 Ke3 48. Bb7 Kf2 49. h4 gxh4 50. f4 Kg3 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.17"]
[Round "3"]
[White "Bosma, Jan"]
[Black "Dijkhuis, Sven"]
[Result "0-1"]
[ECO "A29"]
[BlackElo "1712"]
[PlyCount "84"]
[EventDate "2012.05.17"]
[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 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. g3 Bb4 5. a3 Bxc3 6. bxc3 0-0 7. Bg2 d5 8. cxd5 Nxd5 9. e4 Nf6 10. d3 Bg4 11. 0-0 Qd7 12. Qc2 Rad8 13. Ne1 Rfe8 14. f3 Be6 15. Bg5 Qe7 16. Kh1 h6 17. Bxf6 Qxf6 18. f4 exf4 19. Rxf4 Qe7 20. d4 Bc4 21. Nd3 Bxd3 22. Qxd3 Ne5 23. Qb1 Ng6 24. Rf1 b6 25. Qb4 c5 26. dxc5 bxc5 27. Qb3 Ne5 28. Rad1 c4 29. Qa2 Qc5 30. a4 Rxd1 31. Rxd1 Ng4 32. Rf1 Rd8 33. Qe2 Ne3 34. Qf2 f6 35. Bh3 Qg5 36. Re1 Ng4 37. Bxg4 Qxg4 38. Qxa7 Qf3+ 39. Kg1 Rd2 40. Qa8+ Kh7 41. e5 Qf2+ 42. Kh1 Qxh2# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.17"]
[Round "1"]
[White "Bosma, Jan"]
[Black "Kanters, Cor"]
[Result "1/2-1/2"]
[ECO "A16"]
[PlyCount "84"]
[EventDate "2012.05.17"]
[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. cxd5 Nxd5 4. g3 Nxc3 5. bxc3 Bf5 6. Bg2 c6 7. Nf3 g6 8. Qb3 Qb6 9. Qxb6 axb6 10. 0-0 Nd7 11. Re1 Nc5 12. Nd4 Bg7 13. Nxf5 gxf5 14. a3 b5 15. Rb1 0-0 16. d4 Na4 17. Bd2 Rab8 18. e4 fxe4 19. Bxe4 Rfd8 20. Bc2 e5 21. c4 Rxd4 22. cxb5 Rxd2 23. Bxa4 cxb5 24. Bxb5 Ra8 25. a4 Rc8 26. Rbc1 Rxc1 27. Rxc1 e4 28. Rc8+ Bf8 29. Rc7 b6 30. Bc4 Bc5 31. Rxf7 Rc2 32. Rf4+ Rxc4 33. Kg2 Rxa4 34. f3 Ra2+ 35. Kh3 exf3 36. Rxf3 Bg1 37. Rb3 Kg7 38. g4 Bc5 39. Rb5 Kg6 40. Rb1 Kg5 41. Kg3 Ra3+ 42. Kg2 Kxg4 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2012.05.17"]
[Round "2"]
[White "Van Nimwegen, Martijn"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "78"]
[EventDate "2012.05.17"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. 0-0 0-0 6. h3 e5 7. d3 c6 8. Be3 d5 9. Bb3 d4 10. Nxe5 dxc3 11. Nxf7 Rxf7 12. Bxf7+ Kxf7 13. bxc3 Be6 14. a4 Kg8 15. Rb1 b6 16. Bg5 Qc7 17. Qf3 Nbd7 18. Bf4 Qd8 19. Rb4 Qf8 20. Ra1 Nh5 21. Bd2 Qxf3 22. gxf3 Bxh3 23. a5 bxa5 24. Rxa5 Ne5 25. Kh2 Nxf3+ 26. Kxh3 Nxd2 27. Rb7 Rf8 28. Raxa7 Rf3+ 29. Kg2 Nf4+ 30. Kg1 Ne6 31. Re7 Rf6 32. e5 Nf3+ 33. Kg2 Nxe5 34. d4 Nf7 35. Ra6 h5 36. Rxc6 Nf4+ 37. Kg3 Rxc6 38. Kxf4 Kf8 39. Re3 Bh6+ 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "7"]
[White "Bosma, Jan"]
[Black "Kazarian, Anna Maja"]
[Result "0-1"]
[ECO "B26"]
[WhiteElo "1367"]
[BlackElo "1864"]
[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 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 a6 6. Be3 d6 7. a4 e6 8. f4 Nge7 9. Nf3 b6 10. 0-0 d5 11. exd5 exd5 12. d4 Rb8 13. Rb1 Nf5 14. Re1 0-0 15. Nxd5 cxd4 16. Bd2 a5 17. c4 dxc3 18. Nxc3 Bb7 19. Be3 Nxe3 20. Rxe3 Nd4 21. Rd3 Bxf3 22. Bxf3 Nxf3+ 23. Rxf3 Qc7 24. Nd5 Qc5+ 25. Ne3 Rfe8 26. Qe2 Bd4 27. Kf2 Re4 28. Re1 Rbe8 29. Qd2 Bxe3+ 30. Rfxe3 Rxa4 31. Kf3 Qc6+ 32. Kf2 Qc5 33. Kf3 Rxe3+ 34. Rxe3 Rd4 35. Qe2 Qd5+ 36. Kf2 Rd2 37. Qxd2 Qxd2+ 38. Re2 Qd4+ 39. Kf1 a4 40. Ke1 b5 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "8"]
[White "De Feijter, Bas"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "1399"]
[BlackElo "1367"]
[PlyCount "81"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 Bg7 5. Nf3 0-0 6. h3 c6 7. Be2 Qc7 8. 0-0 Nbd7 9. Qd2 b5 10. Bd3 Bb7 11. Bh6 Rad8 12. Bxg7 Kxg7 13. Rfe1 e5 14. dxe5 dxe5 15. Qe3 a5 16. Rad1 Rfe8 17. Nh4 h6 18. Be2 Qb6 19. Qg3 Kh7 20. Bg4 Nc5 21. Qe3 Nxg4 22. hxg4 b4 23. Ne2 Na4 24. Qb3 Qc7 25. Qxa4 Ba6 26. Rxd8 Qxd8 27. Qb3 Kg7 28. Qf3 Qxh4 29. Rd1 Rd8 30. Rxd8 Qxd8 31. Ng3 Qd2 32. Qb3 Qd1+ 33. Kh2 Qxg4 34. Qa4 Qh4+ 35. Kg1 Qd8 36. Qxc6 Qc8 37. Qxc8 Bxc8 38. Kf1 Ba6+ 39. Ke1 a4 40. Kd2 Bc4 41. b3 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.04"]
[Round "9"]
[White "Van Kaam, Alex"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1190"]
[BlackElo "1367"]
[PlyCount "78"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. d3 0-0 6. 0-0 e5 7. Bg5 Nbd7 8. Nd5 c6 9. Nxf6+ Nxf6 10. Qe2 Qc7 11. Rad1 b5 12. Bb3 a5 13. a3 Bb7 14. c3 Rfe8 15. Qc2 d5 16. Rfe1 Rad8 17. Bxf6 Bxf6 18. d4 dxe4 19. Rxe4 exd4 20. cxd4 a4 21. Rxe8+ Rxe8 22. Ba2 Qd7 23. b3 Bxd4 24. h3 c5 25. bxa4 Bxf3 26. gxf3 bxa4 27. Kg2 Qe7 28. Qxa4 Qg5+ 29. Kf1 Qe5 30. Bc4 Kg7 31. Qd7 Re7 32. Qg4 Qh2 33. Qg3 Qh1+ 34. Qg1 Qxh3+ 35. Qg2 Qxg2+ 36. Kxg2 Ra7 37. Rd3 Bb2 38. Rd2 Bxa3 39. Ra2 Ra5 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "6"]
[White "Baselmans, Luuk"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "1369"]
[BlackElo "1367"]
[PlyCount "93"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. d4 Bg7 5. Be2 0-0 6. 0-0 c6 7. Be3 Nbd7 8. Qd3 Qc7 9. Rad1 b5 10. b4 Bb7 11. d5 a6 12. Rfe1 Nb6 13. Bxb6 Qxb6 14. Qd4 Qxd4 15. Nxd4 cxd5 16. exd5 Nxd5 17. Nxd5 Bxd5 18. Nxb5 axb5 19. Rxd5 Rxa2 20. Bxb5 Rxc2 21. Rxe7 Rb8 22. Bf1 Rxb4 23. Rxd6 Bf8 24. Rd8 Kg7 25. Re1 Rbb2 26. f3 Bb4 27. Red1 Rc3 28. h3 Rbc2 29. Re8 Rc1 30. Ree1 R1c2 31. Re4 Bc5+ 32. Kh1 Bf2 33. Re2 Rxe2 34. Bxe2 Bg3 35. Rd3 Rc1+ 36. Rd1 Rxd1+ 37. Bxd1 f5 38. Be2 Kf6 39. Kg1 Ke5 40. Kf1 h5 41. Bd1 g5 42. Be2 Kd4 43. Bd1 Ke3 44. Be2 Kf4 45. Bd1 Bh4 46. Kg1 Kg3 47. Bc2 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "4"]
[White "Bhattacharjee, Sourav"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B08"]
[WhiteElo "1631"]
[BlackElo "1367"]
[PlyCount "68"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be3 0-0 6. Qd2 c6 7. 0-0-0 b5 8. Bd3 Bg4 9. h3 Bxf3 10. gxf3 a5 11. h4 h5 12. Bh6 e5 13. Bxg7 Kxg7 14. Ne2 Rh8 15. f4 exd4 16. Nxd4 Qb6 17. c3 b4 18. Rdg1 bxc3 19. bxc3 Nbd7 20. Nf5+ Kf8 21. Nxd6 Rb8 22. Nc4 Qa7 23. Kc2 Nc5 24. f3 Rd8 25. Ne5 Qb7 26. Rb1 Qc7 27. Qe3 Na4 28. Rb3 Qd6 29. Rb7 Rh7 30. Bc4 Nd7 31. Rd1 Qxd1+ 32. Kxd1 Nxe5+ 33. Kc1 Nxc4 34. Rc7 Nxe3 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.03"]
[Round "5"]
[White "Bosma, Jan"]
[Black "Corstjens, Rolf"]
[Result "1/2-1/2"]
[ECO "C15"]
[WhiteElo "1367"]
[BlackElo "1677"]
[PlyCount "113"]
[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 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 c5 5. dxc5 Bxc5 6. exd5 exd5 7. Nxd5 Bxf2+ 8. Kxf2 Qxd5 9. Nf3 Nf6 10. Re1+ Be6 11. Bg5 Nbd7 12. b3 0-0 13. c4 Qc5+ 14. Be3 Qc7 15. Kg1 Bg4 16. Rf1 Ne5 17. Be2 Rad8 18. Qc2 Nxf3+ 19. Bxf3 Bxf3 20. Rxf3 Qe5 21. Raf1 Ng4 22. Rh3 h6 23. Bxa7 Qa5 24. Be3 Nxe3 25. Rxe3 Rd2 26. Qe4 Qa7 27. a3 Rfd8 28. Rf2 Qxa3 29. Rxd2 Rxd2 30. h3 Rd1+ 31. Kh2 Qd6+ 32. Qe5 f6 33. Qxd6 Rxd6 34. b4 Rd4 35. Rc3 Kf7 36. b5 b6 37. c5 bxc5 38. Rxc5 Rb4 39. Rc7+ Kg6 40. Rb7 Rb3 41. b6 f5 42. Rb8 Kh5 43. b7 g6 44. Kg1 Kg5 45. Kh2 f4 46. Kg1 Rb1+ 47. Kf2 Rb3 48. Kg1 Rb2 49. Kf1 h5 50. Kg1 Rb6 51. Kf2 Rb3 52. Kg1 Rb4 53. Kf2 Rb3 54. Kg1 Rb2 55. Kf1 Rb4 56. Kf2 Rb3 57. Kg1 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "3"]
[White "Bosma, Jan"]
[Black "Klijn, Hugo"]
[Result "1-0"]
[ECO "C80"]
[WhiteElo "1367"]
[BlackElo "982"]
[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 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. Re1 Nf6 7. Nxe5 Nxe5 8. Rxe5+ Be7 9. Qe1 Ng4 10. Re4 f5 11. Re2 c6 12. h3 Nf6 13. d4 Nd5 14. Bg5 h6 15. Bxe7 Nxe7 16. Nc3 b5 17. Bb3 d5 18. a4 b4 19. Na2 a5 20. c3 bxc3 21. Nxc3 Ra7 22. Qd2 0-0 23. Re3 f4 24. Rf3 Rb7 25. Bc2 Bf5 26. Rxf4 Bxc2 27. Rxf8+ Qxf8 28. Qxc2 Qf6 29. Rd1 Nf5 30. Nxd5 Qg5 31. Rd3 Nh4 32. Ne3 Qg6 33. Rc3 Qd6 34. Rxc6 Qxc6 35. Qxc6 Rxb2 36. Qe8+ Kh7 37. Qe4+ Kg8 38. Qxh4 Rb1+ 39. Kh2 Ra1 40. Qh5 Rxa4 41. Qe8+ Kh7 42. Qxa4 Kg8 43. Qe8+ Kh7 44. Qf7 h5 45. Nf5 Kh8 46. Qxg7# 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "1"]
[White "Bosma, Jan"]
[Black "Mouhdad, Yassine"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1367"]
[BlackElo "1675"]
[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 c5 2. c3 d6 3. d4 cxd4 4. cxd4 Nf6 5. Nc3 e6 6. Bg5 Be7 7. Nf3 a6 8. Rc1 0-0 9. Bc4 b5 10. Bb3 Bb7 11. e5 Ne4 12. Bxe7 Qxe7 13. 0-0 Nd7 14. Re1 Nxc3 15. Rxc3 Rac8 16. d5 Rxc3 17. bxc3 exd5 18. Bxd5 Bxd5 19. Qxd5 Nxe5 20. Nxe5 dxe5 21. Qxe5 Qa3 22. Re2 Qc1+ 23. Re1 Qb2 24. Re2 Qb1+ 25. Re1 Qxa2 26. g3 g6 27. Kg2 Rc8 28. Re3 Qc4 29. h4 h5 30. Kh2 a5 31. Qf6 Qc5 32. Qe5 a4 33. Qe7 Rc7 34. Qd8+ Kh7 35. Re8 Qxc3 36. Qa8 a3 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2011.06.02"]
[Round "2"]
[White "Brandwijk, Harm"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1000"]
[BlackElo "1367"]
[PlyCount "111"]
[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 d6 2. Nf3 Nf6 3. Nc3 g6 4. Bc4 Bg7 5. d3 0-0 6. Bg5 Nbd7 7. 0-0 c6 8. Qe2 e5 9. d4 exd4 10. Nxd4 Qc7 11. b4 b5 12. Bb3 Re8 13. Rfd1 Bb7 14. f3 a6 15. Qd2 c5 16. Nde2 c4 17. Qxd6 Qxd6 18. Rxd6 cxb3 19. axb3 Re6 20. Rad1 Rxd6 21. Rxd6 Rc8 22. Bxf6 Nxf6 23. Rb6 Rc7 24. Kf2 Nd7 25. Rd6 Be5 26. Rd3 Bxh2 27. g3 Ne5 28. Rd8+ Kg7 29. Kg2 Re7 30. Nd4 Rc7 31. Nd5 Bxd5 32. Rxd5 Bxg3 33. Kxg3 Nc6 34. Rc5 h5 35. Nxc6 Rb7 36. c4 bxc4 37. bxc4 Kf6 38. Ra5 Rb6 39. b5 axb5 40. cxb5 Kg5 41. Ne5 f5 42. Nc4 Rb7 43. b6 h4+ 44. Kh3 Kf4 45. Ra7 Rb8 46. b7 Kxf3 47. Na5 fxe4 48. Ra8 Rxb7 49. Nxb7 e3 50. Ra3 Kf2 51. Nc5 e2 52. Ra2 Kf1 53. Nd3 g5 54. Kg4 e1Q 55. Nxe1 Kxe1 56. Rh2 1-0

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.03"]
[Round "6"]
[White "Bosma, Jan"]
[Black "Korenwinder, Tom"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "132"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Be2 Nf6 4. Nc3 g6 5. 0-0 Bg7 6. b3 0-0 7. d3 Nc6 8. Be3 Ng4 9. h3 Nxe3 10. fxe3 Bxc3 11. Rb1 Bg7 12. d4 cxd4 13. exd4 Bd7 14. c4 Rc8 15. Qd2 Qb6 16. Rbd1 Qb4 17. Qxb4 Nxb4 18. Rd2 a6 19. c5 dxc5 20. dxc5 Bb5 21. Bxb5 axb5 22. a3 Nc6 23. Rd7 Rb8 24. Re1 Rfd8 25. Rc7 Kf8 26. Rf1 Ke8 27. g4 Rdc8 28. Rxc8+ Rxc8 29. Ng5 h6 30. Rxf7 Bf6 31. Rh7 Bxg5 32. Rh8+ Kd7 33. Rh7 Ne5 34. h4 Nf3+ 35. Kg2 Nxh4+ 36. Kg3 Rxc5 37. a4 bxa4 38. bxa4 Rc3+ 39. Kf2 Ra3 40. Rf7 Rxa4 41. e5 Ke6 42. Rf8 b5 43. Rb8 Ra2+ 44. Ke1 Rb2 45. Kd1 Kxe5 46. Rb7 Kf4 47. Rb6 e5 48. Re6 e4 49. Re8 e3 50. Rf8+ Kxg4 51. Re8 e2+ 52. Rxe2 Rxe2 53. Kxe2 Nf5 54. Ke1 h5 55. Ke2 h4 56. Kf1 h3 57. Kg1 b4 58. Kh1 b3 59. Kg1 b2 60. Kh2 Bf4+ 61. Kg1 b1Q+ 62. Kf2 Qc2+ 63. Kg1 h2+ 64. Kh1 Qc1+ 65. Kg2 h1Q+ 66. Kf2 Qcf1# 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.03"]
[Round "8"]
[White "Bosma, Jan"]
[Black "Rekveld, Bram"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "57"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Bc5 5. Re1 a6 6. Ba4 d6 7. c3 Bd7 8. d4 exd4 9. cxd4 Bb4 10. Bd2 Bxd2 11. Qxd2 0-0 12. Nc3 Bg4 13. Qd3 Nb4 14. Qd1 Re8 15. Bxe8 Nxe8 16. a3 Bxf3 17. gxf3 Qg5+ 18. Kf1 Rd8 19. axb4 c5 20. bxc5 dxc5 21. d5 Nf6 22. e5 Nh5 23. Ne4 Qg6 24. Ng3 Nf4 25. Qb1 Qg5 26. e6 fxe6 27. dxe6 Re8 28. Qf5 Qh4 29. Qf7+ 1-0

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.03"]
[Round "7"]
[White "Nies, Levi"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "D20"]
[PlyCount "100"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e6 4. Bxc4 Nd7 5. Nf3 g6 6. 0-0 Bg7 7. Nc3 Ne7 8. Bf4 b6 9. Qd2 h6 10. h3 Bb7 11. Rad1 c6 12. Rfe1 Rc8 13. Re2 a6 14. d5 cxd5 15. Bb3 Bxc3 16. bxc3 dxe4 17. Ne5 Nxe5 18. Qxd8+ Rxd8 19. Rxd8+ Kxd8 20. Bxe5 Rg8 21. Bc2 f5 22. c4 g5 23. Rd2+ Kc8 24. Ba4 Rd8 25. Rxd8+ Kxd8 26. Bf6 f4 27. Bd1 Ke8 28. Bg4 Kf7 29. Bd4 b5 30. c5 Nc6 31. Bb2 Nb4 32. a3 Nd3 33. Bd4 e5 34. Bc3 Nxc5 35. g3 Nd3 36. Be2 Nc1 37. Bd1 Ke6 38. Bc2 Ne2+ 39. Kg2 Nxc3 40. gxf4 exf4 41. f3 exf3+ 42. Kf2 h5 43. Kg1 g4 44. hxg4 hxg4 45. Kf2 g3+ 46. Kg1 f2+ 47. Kf1 f3 48. Bd3 Ne4 49. Bxe4 Bxe4 50. a4 Bd3# 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.03"]
[Round "9"]
[White "Van Roon, Sjoerd"]
[Black "Bosma, Jan"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "107"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nxc6 bxc6 6. Bc4 Nf6 7. Nc3 Bb4 8. 0-0 0-0 9. Bg5 h6 10. Bh4 Re8 11. a3 Bxc3 12. bxc3 d5 13. exd5 cxd5 14. Bb5 Re6 15. c4 d4 16. f4 exf4 17. Rxf4 Rd6 18. c5 Rd5 19. Bc6 Rf5 20. Rxf5 Bxf5 21. Bxa8 Qxa8 22. Qxd4 Bxc2 23. Bxf6 gxf6 24. Qxf6 Qc8 25. Qxh6 Qd8 26. Rc1 Qe7 27. Qd2 Qxc5+ 28. Qf2 Qxa3 29. Qg3+ Qxg3 30. hxg3 Be4 31. Ra1 Kg7 32. Rxa7 Kg6 33. Re7 Bd5 34. Kh2 Kf5 35. Kh3 Kf6 36. Re1 Kg6 37. g4 Be6 38. Kh4 Kh6 39. g5+ Kg6 40. g4 Kg7 41. Kh5 Kg8 42. g6 Kg7 43. gxf7 Bxf7+ 44. Kg5 Bg6 45. Re7+ Bf7 46. Kf5 Kh6 47. g5+ Kg7 48. g6 Kg8 49. gxf7+ Kf8 50. Ke6 Kg7 51. Re8 Kg6 52. f8Q Kh7 53. Qh8+ Kg6 54. Rg8# 1-0

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.02"]
[Round "2"]
[White "Bosma, Jan"]
[Black "Kevlishvili, Robby"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "89"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 e6 4. d4 cxd4 5. cxd4 Nf6 6. Nc3 Bb4 7. Bd2 Bxc3 8. bxc3 Nxe4 9. Bd3 Nf6 10. 0-0 0-0 11. Re1 a6 12. Rb1 d5 13. c4 dxc4 14. Bxc4 Nxd4 15. Nxd4 Qxd4 16. Bb3 Rd8 17. Re2 e5 18. Qe1 e4 19. Rd1 Qe5 20. Bb4 Bg4 21. Rxd8+ Rxd8 22. Rd2 Rc8 23. Ba4 b5 24. Bb3 e3 25. fxe3 Ne4 26. Rd4 Bf5 27. Bc3 Nxc3 28. Qxc3 h6 29. Rd8+ Rxd8 30. Qxe5 Bg6 31. Qc7 Re8 32. Qb6 Kh7 33. Qxa6 Rxe3 34. Qxb5 f6 35. Qc4 Re8 36. Bc2 f5 37. Qf4 Rf8 38. a4 Rf6 39. a5 Bf7 40. Qa4 g6 41. a6 Rd6 42. a7 Bd5 43. Qe8 Ra6 44. Qd7+ Kh8 45. Qc8+ 1-0

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.02"]
[Round "3"]
[White "Bosma, Jan"]
[Black "Slomczewski, Michal"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "149"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 d5 2. Nc3 d4 3. Na4 Bd7 4. Nc5 b6 5. Nb3 e5 6. c3 dxc3 7. bxc3 Nc6 8. Bb5 a6 9. Be2 Nf6 10. d3 h6 11. Nf3 Bd6 12. 0-0 0-0 13. Qc2 Be6 14. d4 Bxb3 15. axb3 b5 16. Rd1 Qc8 17. c4 exd4 18. Nxd4 Nxd4 19. Rxd4 Be5 20. Qc3 c5 21. Be3 cxd4 22. Bxd4 Bxd4 23. Qxd4 Qd8 24. Qe3 bxc4 25. Bxc4 Re8 26. f3 Qd7 27. e5 Qe7 28. Re1 Nd7 29. f4 Qc5 30. Qxc5 Nxc5 31. Ra1 Nd7 32. Bd5 Ra7 33. b4 Nb6 34. Be4 Rc8 35. Rd1 g6 36. f5 Rc4 37. Rd8+ Kg7 38. Bf3 Rc1+ 39. Kf2 Rd7 40. Rb8 Nd5 41. fxg6 fxg6 42. e6 Rc2+ 43. Kg3 Rd6 44. Bxd5 Rxd5 45. e7 Rd3+ 46. Kf4 Rc4+ 47. Ke5 Re3+ 48. Kd5 Rce4 49. Ra8 Rxe7 50. Rxa6 R3e5+ 51. Kc4 Rb7 52. b5 Rexb5 53. h3 Rb4+ 54. Kc5 R7b5+ 55. Kc6 Kf6 56. g4 Rb6+ 57. Rxb6 Rxb6+ 58. Kxb6 Kg5 59. Kc6 Kh4 60. Kd6 Kxh3 61. Ke5 Kxg4 62. Ke4 Kg3 63. Ke3 h5 64. Ke2 Kg2 65. Ke3 h4 66. Kf4 h3 67. Kg5 h2 68. Kxg6 h1Q 69. Kf5 Qh4 70. Kg6 Qf4 71. Kh5 Qg3 72. Kh6 Qg4 73. Kh7 Qg5 74. Kh8 Kf3 75. Kh7 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.02"]
[Round "4"]
[White "Klein, Jorik"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B50"]
[PlyCount "104"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nf3 d6 4. Bc4 Nf6 5. Ng5 e6 6. Nf3 Nxe4 7. Nxe4 d5 8. Bxd5 exd5 9. Nc3 Qe7+ 10. Ne2 Bg4 11. Nfg1 Nd4 12. f3 Bf5 13. d3 c4 14. Bf4 cxd3 15. cxd3 Qb4+ 16. Bd2 Qxb2 17. Qa4+ Nc6 18. Bc3 Bb4 19. Qb3 Bxc3+ 20. Qxc3 Qxc3+ 21. Nxc3 Nb4 22. 0-0-0 Nxd3+ 23. Kd2 Nf2 24. Nxd5 Nxd1 25. Nc7+ Ke7 26. Nxa8 Nf2 27. Nc7 Nxh1 28. Nd5+ Kd6 29. Ne3 Rd8 30. Nxf5+ Ke5+ 31. Ke1 Kxf5 32. g4+ Kf4 33. Nh3+ Kxf3 34. a4 Kxg4 35. Ng1 Rc8 36. h3+ Kf5 37. Nf3 Rc1+ 38. Kd2 Ra1 39. h4 Ra2+ 40. Ke1 Rxa4 41. h5 Ra1+ 42. Kd2 Ra2+ 43. Ke1 a5 44. Nd2 Rxd2 45. Kxd2 g5 46. h6 a4 47. Kc2 g4 48. Kc1 g3 49. Kb1 g2 50. Ka1 g1Q+ 51. Ka2 Qb6 52. Ka3 Qb3# 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.02"]
[Round "1"]
[White "Schalij, Ties"]
[Black "Bosma, Jan"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "124"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. c3 e5 3. Nf3 Nc6 4. d4 cxd4 5. cxd4 exd4 6. Nxd4 Nf6 7. Bg5 Qa5+ 8. Nc3 Qxg5 9. Ndb5 Qe5 10. Bd3 a6 11. Na3 Bb4 12. 0-0 Bxc3 13. bxc3 Qxc3 14. Nc2 Nd4 15. Nxd4 Qxd4 16. Qf3 0-0 17. Rfe1 d6 18. Qg3 Re8 19. Qf3 Bg4 20. Qg3 Rac8 21. h3 Bh5 22. Rab1 Rc3 23. Re3 Qe5 24. Qxe5 dxe5 25. Rxb7 Ra3 26. g4 Bg6 27. Bc4 Rxe3 28. fxe3 Nxe4 29. Bxa6 Nc5 30. Rb6 Nxa6 31. Rxa6 h5 32. gxh5 Bxh5 33. a4 Rd8 34. a5 Rd1+ 35. Kf2 Ra1 36. Ra8+ Kh7 37. a6 Bg6 38. Kf3 Bd3 39. a7 Bb5 40. Rb8 Bc6+ 41. Ke2 Rxa7 42. Kd3 Bg2 43. h4 Ra4 44. Rf8 f6 45. h5 Rh4 46. h6 Rxh6 47. Rc8 Rh1 48. Rc2 Rh2 49. Rc1 g5 50. Rc6 Bxc6 51. e4 Rh3+ 52. Ke2 Bxe4 53. Kf2 Ra3 54. Ke2 Bd5 55. Kf2 Kg6 56. Ke2 g4 57. Kf2 Kf5 58. Kf1 Ra2 59. Kg1 Ke4 60. Kf1 Ke3 61. Kg1 Kf3 62. Kh1 Kg3+ 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2010.04.02"]
[Round "5"]
[White "Van der Knijff, Gerhard"]
[Black "Bosma, Jan"]
[Result "1/2-1/2"]
[ECO "B50"]
[PlyCount "99"]
[EventDate "2010.04.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bc4 d6 4. Nc3 Nf6 5. d3 Bg4 6. h3 Bh5 7. Be3 e6 8. Qe2 Be7 9. 0-0-0 Nd4 10. Bxd4 cxd4 11. Nb5 a6 12. Nbxd4 b5 13. Bb3 e5 14. Nf5 a5 15. Nxg7+ Kf8 16. Nxh5 Nxh5 17. Nxe5 Nf6 18. Ng4 Qe8 19. d4 a4 20. Bd5 Nxd5 21. exd5 Bg5+ 22. Ne3 Bxe3+ 23. fxe3 Rc8 24. Rhf1 Qd7 25. Qd3 Qc7 26. a3 Rg8 27. g4 Rg5 28. Qxh7 Rg6 29. Kb1 Qxc2+ 30. Ka1 Rg7 31. Qxc2 Rxc2 32. Rh1 Rg5 33. e4 Re2 34. e5 dxe5 35. dxe5 Rexe5 36. d6 Rd5 37. d7 Ke7 38. d8Q+ Kxd8 39. Rxd5+ Rxd5 40. h4 f6 41. h5 Rd7 42. h6 Rh7 43. Rd1+ Ke7 44. Rg1 Rxh6 45. g5 fxg5 46. Rxg5 Rb6 47. Kb1 b4 48. axb4 Rxb4 49. Ka2 Kf6 50. Ra5 1/2-1/2

