[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.07"]
[Round "9"]
[White "Dubbeldam, Mathijs"]
[Black "Yang, Wang"]
[Result "1/2-1/2"]
[ECO "A31"]
[WhiteElo "1558"]
[BlackElo "1930"]
[PlyCount "108"]
[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. c4 Nc6 3. Nf3 Nf6 4. Nc3 d6 5. d4 cxd4 6. Nxd4 e5 7. Nf3 Be7 8. h3 0-0 9. Be3 b6 10. Be2 Bb7 11. Qc2 Rc8 12. 0-0 Qc7 13. Nb5 Qb8 14. a3 Na5 15. Rac1 Bxe4 16. Qa4 a6 17. Nc3 Bc6 18. Qb4 Bxf3 19. Bxf3 Nxc4 20. Nd1 Nxe3 21. Nxe3 Rfe8 22. Nf5 Bf8 23. Bc6 Red8 24. Qh4 Rc7 25. Rc3 Qc8 26. Nh6+ Kh8 27. Rg3 Ng8 28. Nxg8 Kxg8 29. Be4 g6 30. f4 Bg7 31. f5 d5 32. fxg6 fxg6 33. Bf3 Rd6 34. Bg4 Qd8 35. Be6+ Kh8 36. Rxg6 Rc1 37. Qxd8+ Rxd8 38. Rxc1 hxg6 39. Rc6 e4 40. Rc8 Rxc8 41. Bxc8 Bxb2 42. Bxa6 Bxa3 43. Bb7 e3 44. Bxd5 Bc5 45. Kf1 Kg7 46. Ke2 Kf6 47. Kd3 Ke5 48. Bc6 Kf4 49. Ke2 g5 50. Kd3 Ke5 51. g3 Kd6 52. Bb5 Kd5 53. h4 gxh4 54. gxh4 Ke5 1/2-1/2

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.06"]
[Round "8"]
[White "Dubbeldam, Mathijs"]
[Black "Schilstra, Laurens"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1558"]
[BlackElo "1978"]
[PlyCount "107"]
[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 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be3 0-0 7. Be2 Re8 8. 0-0 Bf8 9. Bg5 h6 10. Bh4 c6 11. h3 Nbd7 12. Qd2 Qc7 13. f3 a5 14. a4 d5 15. exd5 cxd5 16. Ncb5 Qb8 17. c4 Nh5 18. f4 Nhf6 19. cxd5 Nxd5 20. Bc4 Ne3 21. Qe2 Nb6 22. Bb3 Bd7 23. Qh5 Be6 24. Bxe6 fxe6 25. Rf3 Ned5 26. f5 Nf4 27. Qg4 e5 28. Ne6 h5 29. Qg5 Nxe6 30. fxe6 Rxe6 31. Qxh5 g6 32. Qg4 Qc8 33. Nc7 Rc6 34. Nxa8 Qxg4 35. hxg4 Nxa8 36. Re1 Bg7 37. b3 Nb6 38. Bd8 Nd5 39. Bxa5 Nf4 40. Rc3 Ra6 41. Rc8+ Kh7 42. Bc3 Rb6 43. b4 Nd5 44. Kf2 Nxc3 45. Rh1+ Bh6 46. Rxc3 g5 47. Rc7+ Kg6 48. b5 Bg7 49. Rd1 Rf6+ 50. Ke3 Rf4 51. Rd6+ Bf6 52. Rxb7 Rxa4 53. Rbb6 Rf4 54. Rxf6+ 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.05"]
[Round "7"]
[White "Van der Werf, Joel"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1702"]
[BlackElo "1558"]
[PlyCount "39"]
[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. d4 e6 2. c4 b6 3. e4 Bb7 4. Bd3 Bb4+ 5. Bd2 Bxd2+ 6. Nxd2 Ne7 7. Ngf3 0-0 8. 0-0 f5 9. Re1 Qe8 10. Qc2 Nbc6 11. a3 Qh5 12. Nf1 fxe4 13. Bxe4 Nf5 14. Rad1 Rae8 15. b4 Bc8 16. d5 Nd8 17. c5 Nf7 18. Ne3 N5h6 19. Bxh7+ Kh8 20. Bg6 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.04"]
[Round "6"]
[White "Wouters, Casper"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1735"]
[BlackElo "1558"]
[PlyCount "89"]
[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 e6 2. d4 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. 0-0 0-0 9. Ne2 Ng6 10. Ng3 Nc6 11. Be3 Be7 12. Kh1 Nb4 13. Bb1 Rc8 14. a3 Nc6 15. Ne1 d5 16. e5 f6 17. Qg4 f5 18. Nxf5 exf5 19. Bxf5 Ncxe5 20. dxe5 Nxe5 21. Qh3 Bh4 22. Bd4 Nc6 23. Be6+ Kh8 24. Bxc8 Bxc8 25. Qc3 Nxd4 26. Qxd4 Bf6 27. Qd2 Ba6 28. Nd3 Qd6 29. Rfe1 h6 30. Rad1 Bg5 31. f4 Bf6 32. Ne5 Bh4 33. g3 Bf6 34. Ng6+ Kg8 35. Nxf8 Kxf8 36. h3 d4 37. Qg2 Qd7 38. Kh2 Bb7 39. Qe2 Qa4 40. Rd2 Ba6 41. Qe4 Qd7 42. Red1 Bb7 43. Rxd4 Qxd4 44. Qxd4 Bxd4 45. Rxd4 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.03"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Brouwer, Jorn"]
[Result "0-1"]
[ECO "B54"]
[WhiteElo "1558"]
[BlackElo "1676"]
[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. e4 c5 2. c4 d6 3. Nf3 Nf6 4. Nc3 e6 5. d4 cxd4 6. Nxd4 Nc6 7. h3 Be7 8. Be3 0-0 9. Be2 a6 10. Qc2 Bd7 11. 0-0 Rc8 12. b3 d5 13. exd5 exd5 14. Rfd1 Na5 15. Nf5 dxc4 16. Nxe7+ Qxe7 17. Bb6 cxb3 18. axb3 Nc6 19. Bc4 Be6 20. Re1 Qb4 21. Rxe6 Qxb6 22. Qf5 fxe6 23. Bxe6+ Kh8 24. Bxc8 Ne7 25. Na4 Qd4 26. Qc5 Qxa1+ 27. Kh2 Rxc8 28. Qxe7 Re8 29. Qxb7 Qe5+ 30. g3 Qe1 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.02"]
[Round "4"]
[White "Hofstra, Tijmen"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "927"]
[BlackElo "1558"]
[PlyCount "59"]
[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 e6 2. d4 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. a3 Bxc3+ 9. bxc3 0-0 10. 0-0 f5 11. exf5 Nxf5 12. Bg5 Qc7 13. c4 h6 14. Bd2 Nc6 15. Bc3 Qf4 16. d5 exd5 17. cxd5 Nce7 18. Be5 Qg4 19. h3 Qg6 20. Nh4 Qf7 21. Nxf5 Nxf5 22. Qg4 Bxd5 23. Bxf5 g5 24. Bxd7 Rad8 25. Bb5 Be6 26. Qg3 Qf5 27. Rad1 Bd5 28. Bd3 Qd7 29. h4 g4 30. Bc4 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.01"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Van Baar, Esper"]
[Result "0-1"]
[ECO "B39"]
[WhiteElo "1558"]
[BlackElo "2053"]
[PlyCount "62"]
[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. c4 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. 0-0-0 Nc6 10. f4 Qa5 11. Bd2 Nb4 12. a3 Bxc3 13. Bxc3 Na2+ 14. Kc2 Nxc3 15. bxc3 Qxa3 16. Rb1 d5 17. Qd1 Qa4+ 18. Kb2 Qxd1 19. Rxd1 dxe4 20. Rd4 f5 21. Be2 Bd7 22. Rhd1 Bc6 23. c5 Kf7 24. Bc4+ Kf6 25. g3 Rhc8 26. Ka3 Be8 27. Bd5 Rxc5 28. Rc4 Rxc4 29. Bxc4 Rc8 30. Bd5 Rxc3+ 31. Kb2 Rc5 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.04.30"]
[Round "2"]
[White "Dubbeldam, Mathijs"]
[Black "Baselmans, Sam"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1558"]
[BlackElo "1945"]
[PlyCount "74"]
[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 g6 4. Bf4 Bg7 5. Bc4 0-0 6. Nge2 Nxe4 7. Nxe4 d5 8. Bd3 dxe4 9. Bxe4 Nd7 10. 0-0 c6 11. c3 Qb6 12. Qd2 e5 13. Bh6 Nf6 14. Bxg7 Kxg7 15. Ng3 Rd8 16. Rfd1 Be6 17. b3 Rd7 18. Nf5+ Bxf5 19. Bxf5 Rd6 20. Bc2 exd4 21. cxd4 Rad8 22. Qc3 Rxd4 23. Rxd4 Rxd4 24. Rd1 c5 25. Qe3 Qd6 26. Rxd4 cxd4 27. Qf3 Qa3 28. Qd1 Qxa2 29. Qb1 Qa5 30. f3 Qc3 31. Qd1 Nd5 32. Be4 Qe3+ 33. Kf1 Qxe4 34. fxe4 Ne3+ 35. Ke2 Nxd1 36. Kxd1 Kf6 37. Kd2 Ke5 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.04.29"]
[Round "1"]
[White "Van Meegen, Ruud"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2113"]
[BlackElo "1558"]
[PlyCount "119"]
[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 e6 2. d3 b6 3. Nf3 Bb7 4. Nbd2 d5 5. e5 d4 6. c3 c5 7. cxd4 cxd4 8. Qa4+ Qd7 9. Qxd4 Ne7 10. Qxd7+ Nxd7 11. Be2 Ng6 12. d4 Nf4 13. Bf1 f6 14. Nc4 Bb4+ 15. Kd1 fxe5 16. dxe5 0-0 17. a3 Bc5 18. Bxf4 Bxf3+ 19. gxf3 Rxf4 20. Rc1 Bxf2 21. Bh3 Nf8 22. Ke2 Bd4 23. b3 b5 24. Nd6 Bxe5 25. Nxb5 Kf7 26. Rc6 Rh4 27. Bf1 Rxh2+ 28. Rxh2 Bxh2 29. Ke3 Bg1+ 30. Ke4 Bb6 31. Bc4 Rd8 32. a4 Ke7 33. b4 Kd7 34. Rd6+ Ke7 35. Rc6 Kd7 36. Rd6+ Ke7 37. Rxd8 Kxd8 38. a5 Bf2 39. Nd4 Kd7 40. f4 Kd6 41. Be2 Nd7 42. Nb5+ Kc6 43. Na3 Kd6 44. Kf3 Bd4 45. Nc2 Bc3 46. Ke3 Kd5 47. Kd3 Bf6 48. Na3 e5 49. Bf3+ Ke6 50. Nb5 a6 51. Nc7+ Kf5 52. Nxa6 exf4 53. Nc5 Ne5+ 54. Ke2 Nxf3 55. Kxf3 Bc3 56. a6 g5 57. a7 g4+ 58. Kf2 Bxb4 59. Nd3 Bc3 60. a8Q 1-0

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.09"]
[Round "7"]
[White "Beukema, Constantijn"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1000"]
[BlackElo "1350"]
[PlyCount "80"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 b6 3. Nc3 Bb7 4. Nf3 Bb4 5. Bd3 Ne7 6. 0-0 0-0 7. Ne2 f5 8. Ng3 fxe4 9. Nxe4 Nf5 10. c3 Be7 11. Ng3 c5 12. dxc5 Bxc5 13. Nxf5 exf5 14. Bf4 Nc6 15. Bc4+ Kh8 16. Ng5 Qe8 17. Re1 Qg6 18. Qxd7 Na5 19. Nf7+ Rxf7 20. Re8+ Rxe8 21. Qxe8+ Rf8 22. Qxg6 hxg6 23. Bf1 Nc6 24. Re1 Be7 25. Bb5 g5 26. Bxc6 Bxc6 27. Rxe7 gxf4 28. Rxa7 Ra8 29. Rxa8+ Bxa8 30. g3 fxg3 31. fxg3 Bd5 32. a3 Bb3 33. Kf2 Kg8 34. Ke3 Kf7 35. Kf4 Kf6 36. h4 g6 37. g4 fxg4 38. Kxg4 Be6+ 39. Kf3 Bd5+ 40. Ke3 Ke5 0-1

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.09"]
[Round "6"]
[White "Dubbeldam, Mathijs"]
[Black "Van Stiphout, Sophie"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1350"]
[BlackElo "1086"]
[PlyCount "103"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 f6 6. Bc4 c6 7. Bf4 b5 8. Bb3 Bb7 9. c4 c5 10. Qd3 b4 11. 0-0 Ne7 12. Nd2 Ng6 13. Bg3 Be7 14. f4 Qc7 15. Nf3 Nxf4 16. Qe3 Bd6 17. Nh4 g5 18. Nf5 0-0-0 19. Nxd6+ Qxd6 20. Rad1 Qe5 21. Bxf4 gxf4 22. Rxf4 d6 23. a3 a5 24. axb4 axb4 25. Rd2 Rhf8 26. Rdf2 Rf7 27. Bd1 h5 28. Qh3+ Kc7 29. Qxh5 Qxh5 30. Bxh5 Re7 31. Rxf6 Rxe4 32. Rf7+ Kb6 33. Rxb7+ Kxb7 34. Bf3 d5 35. Bxe4 dxe4 36. Re2 Rd4 37. b3 Kc6 38. Kf2 Kd6 39. h4 Ke5 40. Re3 Kf4 41. h5 Rd2+ 42. Re2 e3+ 43. Ke1 Rd6 44. g4 Re6 45. Kf1 Kxg4 46. h6 Kf3 47. Rh2 Ra6 48. Rh3+ Ke4 49. h7 Ra1+ 50. Kg2 Ra2+ 51. Kf1 Ra1+ 52. Kg2 1/2-1/2

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.08"]
[Round "5"]
[White "Van Ginneken, Maikel"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1453"]
[BlackElo "1350"]
[PlyCount "57"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 e6 2. c4 b6 3. Nc3 Bb7 4. Bf4 Bb4 5. Qc2 f5 6. a3 Bxc3+ 7. Qxc3 Nf6 8. Nf3 Ne4 9. Qc1 0-0 10. e3 d6 11. Be2 Nd7 12. 0-0 Qe7 13. h4 Ndf6 14. Bg5 Nxg5 15. Nxg5 h6 16. Nh3 Ne4 17. Nf4 Qf6 18. d5 exd5 19. cxd5 Rfc8 20. g3 g5 21. Nh5 Qg6 22. g4 fxg4 23. Bxg4 gxh4 24. Kh2 Qxg4 25. Rg1 Ng3 26. Nf6+ Kf7 27. Nxg4 Ne2 28. Nxh6+ Kf6 29. Qc2 1-0

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.07"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Reusink, Hans"]
[Result "0-1"]
[ECO "B41"]
[WhiteElo "1350"]
[BlackElo "1553"]
[PlyCount "58"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Qc7 6. Nc3 a6 7. Be3 Nf6 8. f4 Bb4 9. Bd3 Nxd4 10. Bxd4 Qxf4 11. g3 Qg5 12. Qe2 0-0 13. 0-0 Bc5 14. Bxc5 Qxc5+ 15. Kh1 e5 16. Rxf6 gxf6 17. Nd5 Qd6 18. Rf1 f5 19. exf5 f6 20. Qh5 b5 21. Re1 Bb7 22. Re4 Bxd5 23. cxd5 Qxd5 24. Kg1 Kh8 25. Rh4 Qf7 26. Qg6 d5 27. Bc2 Ra7 28. Bb3 Rd7 29. Kf2 a5 0-1

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.07"]
[Round "2"]
[White "Muntean, Victor"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1138"]
[BlackElo "1350"]
[PlyCount "66"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 b6 3. Nc3 Bb7 4. Bf4 Bb4 5. d5 Qf6 6. Bd2 Ne7 7. Nf3 0-0 8. e5 Qf5 9. Bd3 Qh5 10. dxe6 fxe6 11. Be2 Nbc6 12. Nb5 Bxd2+ 13. Qxd2 Nxe5 14. 0-0-0 Nxf3 15. gxf3 Nd5 16. Rhg1 Nf4 17. Rde1 Nxe2+ 18. Rxe2 Qxb5 19. Qh6 Rf7 20. Re3 Kh8 21. Qh3 Qf5 22. Qxf5 Rxf5 23. Rd3 Bc6 24. Rd4 Rxf3 25. Rg2 Raf8 26. Rdg4 g6 27. Rh4 Rxf2 28. Rxg6 Rg8 29. Rxg8+ Kxg8 30. Rg4+ Kf7 31. Rh4 Kg6 32. Rg4+ Kh5 33. Rg3 Rxh2 0-1

[Event "Maastricht Limburg op-C 8th"]
[Site "Maastricht"]
[Date "2014.06.06"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Schelleman, Iris"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1350"]
[BlackElo "1656"]
[PlyCount "92"]
[EventDate "2014.06.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 0-0 8. 0-0 Bb6 9. f4 d6 10. Qd3 Re8 11. Nd2 Bd7 12. Rae1 Ng6 13. Bb3 Rad8 14. Nc4 Bc5 15. Bc2 a6 16. b4 Ba7 17. Nxc6 Bxe3+ 18. Qxe3 Bxc6 19. e5 dxe5 20. fxe5 Qe6 21. Bb3 Bd5 22. Qe2 b5 23. Na5 Bxb3 24. Nxb3 Qxe5 25. Qf2 Qd5 26. Rxe8+ Rxe8 27. Nc5 Ra8 28. Qg3 Qe5 29. Qf3 Qe8 30. Qb7 Qc8 31. Qxc8+ Rxc8 32. Nxa6 c6 33. Nc5 Ra8 34. Ra1 Ra3 35. Rd1 h6 36. Rd8+ Kh7 37. Rd2 Rxc3 38. a4 bxa4 39. Nxa4 Rc4 40. Rb2 Ne5 41. Nc5 Ng4 42. Nd3 Rc3 43. Rd2 Rb3 44. h3 Rb1+ 45. Nc1 Rxc1+ 46. Rd1 Rxd1# 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.05.04"]
[Round "9"]
[White "Osinga, Angelique"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1858"]
[BlackElo "1364"]
[PlyCount "115"]
[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 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. 0-0 0-0 9. Bg5 f6 10. Bf4 Ng6 11. Bg3 Bxc3 12. bxc3 Nc6 13. Re1 Rc8 14. Bd6 Rf7 15. Rc1 Kh8 16. Qd2 h6 17. c4 f5 18. e5 Nh4 19. Be2 Na5 20. Qd3 Ba6 21. Nxh4 Qxh4 22. Qg3 Qxg3 23. hxg3 Nxc4 24. Bb4 b5 25. Bh5 g6 26. Bxg6 Rg7 27. Bh5 Bb7 28. Bc5 a6 29. Be2 Bd5 30. a4 Bc6 31. axb5 axb5 32. Bf3 Bxf3 33. gxf3 Nd2 34. Kg2 Nb3 35. Rc3 Nxc5 36. dxc5 Rgg8 37. Rb1 Rb8 38. Rcb3 b4 39. Rxb4 Rxb4 40. Rxb4 Rc8 41. Rb5 Kg7 42. f4 Kg6 43. Kf3 Kh5 44. Kg2 Rc7 45. f3 Rc6 46. Kf2 Kg6 47. Ke3 Kf7 48. Kd4 h5 49. Rb7 Ke7 50. Kc4 Kd8 51. Kb5 Kc8 52. Ra7 Kd8 53. Ra8+ Rc8 54. Rxc8+ Kxc8 55. Kb6 Kd8 56. Kb7 Ke7 57. c6 dxc6 58. Kxc6 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.05.03"]
[Round "8"]
[White "Koning, Erwin"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "A02"]
[WhiteElo "1609"]
[BlackElo "1364"]
[PlyCount "72"]
[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 e6 2. Nf3 b6 3. e3 Bb7 4. b3 Nc6 5. Bb2 f6 6. c4 Qe7 7. Nc3 0-0-0 8. Be2 Nh6 9. 0-0 Rg8 10. Bd3 f5 11. Ng5 Ng4 12. h3 Nf6 13. Ne2 h6 14. Nf3 g5 15. fxg5 hxg5 16. Ned4 g4 17. Nxc6 Bxc6 18. hxg4 Nxg4 19. Rf2 Nxf2 20. Kxf2 Bg7 21. Bxg7 Qxg7 22. Qf1 Qg3+ 23. Ke2 Qxg2+ 24. Qxg2 Rxg2+ 25. Kd1 Bxf3+ 26. Kc2 Rh8 27. Rf1 Bg4 28. e4 Rhh2 29. exf5 Rxd2+ 30. Kc3 Bxf5 31. Bxf5 exf5 32. Rxf5 Rxa2 33. Rf8+ Kb7 34. Rf7 d6 35. Rf3 c5 36. Rg3 Rhd2 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.05.02"]
[Round "7"]
[White "Dubbeldam, Mathijs"]
[Black "Damen, Jip"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1364"]
[BlackElo "1735"]
[PlyCount "42"]
[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. g3 Bg7 5. Bg2 0-0 6. Nge2 Nbd7 7. h3 e5 8. Be3 Re8 9. 0-0 exd4 10. Bxd4 Ne5 11. Rb1 Bd7 12. b4 Qc8 13. Kh2 Nc6 14. Be3 Re5 15. a4 Rh5 16. Nf4 Rh6 17. Bd2 g5 18. Nfd5 Bxh3 19. Bxg5 Bxg2+ 20. Bxh6 Qh3+ 21. Kg1 Qh1# 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.05.01"]
[Round "6"]
[White "Frima, Erik"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "A40"]
[BlackElo "1364"]
[PlyCount "56"]
[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. d4 e6 2. c4 b6 3. Nf3 Bb7 4. Nc3 Bb4 5. Bd2 Ne7 6. a3 Bxc3 7. Bxc3 0-0 8. e3 f5 9. Be2 Ng6 10. b4 Nc6 11. Qd2 a5 12. b5 Nce7 13. 0-0 f4 14. Rad1 fxe3 15. fxe3 Nf5 16. d5 Qe7 17. e4 Qc5+ 18. Nd4 Nd6 19. Bb4 axb4 20. axb4 Nxe4 21. bxc5 Nxd2 22. Rxd2 exd5 23. Nf5 bxc5 24. cxd5 d6 25. Bh5 Rf6 26. Rdf2 Raf8 27. Nh6+ Kh8 28. Nf7+ R8xf7 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.04.30"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Kalle, Erwin"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "1364"]
[BlackElo "1698"]
[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. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. 0-0 0-0 9. e5 Ng4 10. Bf4 f6 11. exf6 Qxf6 12. Ne2 Bc5 13. Qd2 Bd7 14. Be3 Nxe3 15. fxe3 Qg5 16. Nd4 Bxd4 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.04.29"]
[Round "4"]
[White "Zwirs, Jasper"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1933"]
[BlackElo "1364"]
[PlyCount "125"]
[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 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. 0-0 0-0 9. Bg5 f6 10. Bh4 Na6 11. Rc1 Nc7 12. a3 Bd6 13. Ne2 Ng6 14. Bg3 Bxg3 15. hxg3 Ne7 16. Nh4 f5 17. exf5 Nxf5 18. Nxf5 exf5 19. Nf4 Rc8 20. Qb3+ Kh8 21. Rfe1 Qg5 22. d5 Ne8 23. Rxc8 Bxc8 24. Qa4 a5 25. b4 axb4 26. Qxb4 Qf6 27. Rb1 Qd6 28. Qxd6 Nxd6 29. Rxb6 Ne4 30. Bxe4 fxe4 31. a4 Kg8 32. a5 Rf6 33. Kf1 Rxb6 34. axb6 Ba6+ 35. Ke1 Kf7 36. Kd2 g5 37. Ne2 Kf6 38. Ke3 Ke5 39. Nc3 h6 40. Na2 Bb7 41. Nc3 d6 42. f3 exf3 43. gxf3 h5 44. f4+ gxf4+ 45. gxf4+ Kf5 46. Ne4 Bxd5 47. Nxd6+ Ke6 48. b7 Bxb7 49. Nxb7 h4 50. Nc5+ Kf5 51. Ne4 h3 52. Kf3 h2 53. Ng3+ Kg6 54. Kg4 Kf6 55. Kh3 h1Q+ 56. Nxh1 Kf5 57. Kg3 Kg6 58. Kg4 Kf6 59. f5 Kg7 60. Kg5 Kf7 61. f6 Kg8 62. Kg6 Kf8 63. f7 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.04.28"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Van Hoorn, Frank"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "1364"]
[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. c4 Nc6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 g6 7. Be2 Bg7 8. Be3 0-0 9. Rc1 Bd7 10. 0-0 Rc8 11. Qd2 Ng4 12. Nxc6 bxc6 13. Bf4 Qb6 14. c5 Qb7 15. cxd6 exd6 16. Qxd6 Rfd8 17. Qa3 Bf8 18. Qa5 Qxb2 19. Rb1 Qa3 20. Qxa3 Bxa3 21. Ba6 Bc5 22. Bxc8 Bxc8 23. h3 Nf6 24. Rfd1 Rxd1+ 25. Rxd1 Be6 26. Bh6 Nd7 27. Rd3 f6 28. Be3 Bxe3 29. Rxe3 Kf7 30. Kf1 Bc4+ 31. Ke1 Ne5 32. f4 Nd3+ 33. Kd2 Nxf4 34. g4 g5 35. e5 fxe5 36. Rxe5 Nxh3 37. Ra5 a6 38. Ne4 Kg6 39. Ke3 Nf4 40. Rxg5+ 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.04.27"]
[Round "2"]
[White "Mullink, Jochem"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A40"]
[BlackElo "1364"]
[PlyCount "77"]
[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 b6 3. c4 Bb7 4. f3 c5 5. d5 Bd6 6. Nc3 Qh4+ 7. Ke2 Be5 8. Be3 Ne7 9. Nh3 h6 10. Qd2 0-0 11. g3 Qf6 12. Nf2 Qg6 13. Nd3 Bc7 14. Nb5 Bd8 15. Bg2 f5 16. Nf4 Qf6 17. e5 Qxe5 18. d6 Nec6 19. Ng6 Qf6 20. Nxf8 Kxf8 21. Rad1 Na6 22. Rhe1 Ne5 23. Qc3 Nb4 24. a3 Nbc6 25. Kf1 Na5 26. f4 Bxg2+ 27. Kxg2 Ng4 28. Qc2 Nxe3+ 29. Rxe3 Nc6 30. Qd2 a6 31. Nc3 Nd4 32. Ne2 Nc6 33. b4 cxb4 34. axb4 b5 35. Nd4 Na7 36. c5 Qf7 37. Ra3 Nc6 38. Nxc6 dxc6 39. Rda1 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2014.04.26"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Sekandar, Kambiz"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1364"]
[BlackElo "2095"]
[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 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. Nf3 Ne7 6. Nh4 Bg6 7. Nxg6 hxg6 8. Bd3 c5 9. Bb5+ Nbc6 10. dxc5 d4 11. Ne4 Nf5 12. Qe2 Qd5 13. Bf4 Ne3 14. Nd6+ Bxd6 15. fxe3 Bxc5 16. e4 Qd7 17. 0-0-0 a6 18. Bd3 Qc7 19. Qd2 0-0-0 20. Rhf1 Rd7 21. a3 Kb8 22. Bg3 Rc8 23. Qf4 Qb6 24. Rf3 Bf8 25. Be2 Na5 26. Be1 Nb3+ 27. Kb1 Nc5 28. Bf2 Na4 29. Rb3 Qc6 30. Bd3 Nc5 0-1

[Event "NED-ch U16 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "4"]
[White "Dubbeldam, Mathijs"]
[Black "Kootstra, Anneke"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1402"]
[BlackElo "1002"]
[PlyCount "70"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 d6 5. Nc3 Bd7 6. Bc4 Nf6 7. 0-0 Ne5 8. Be2 Be7 9. Bg5 h6 10. Bh4 Nh7 11. Bxe7 Qxe7 12. Nf5 Bxf5 13. exf5 Qd7 14. f4 Nc6 15. Bg4 Nf6 16. Re1+ Kd8 17. Bh3 Re8 18. Qd2 Ne7 19. Ne4 Nxe4 20. Rxe4 Qb5 21. c4 Qc5+ 22. Kf1 Ng8 23. Rxe8+ Kxe8 24. Re1+ Kf8 25. Qe2 Nf6 26. Qd3 Qb4 27. b3 Qc5 28. g3 a6 29. Bg2 Rb8 30. Qe2 Qxf5 31. Qe7+ Kg8 32. Qxc7 Qd3+ 33. Kg1 Qd4+ 34. Kh1 Re8 35. Rxe8+ Nxe8 0-1

[Event "NED-ch U16 op"]
[Site "Borne"]
[Date "2013.08.07"]
[Round "5"]
[White "Louter, Rowan"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1032"]
[BlackElo "1402"]
[PlyCount "110"]
[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 b6 3. Nc3 Bb7 4. Nf3 Bb4 5. Bd2 Ne7 6. Bd3 0-0 7. 0-0 f5 8. Re1 c5 9. a3 cxd4 10. axb4 dxc3 11. Bxc3 Qe8 12. exf5 Nxf5 13. b5 Qh5 14. Nd4 Qg5 15. g3 Nh4 16. Be4 Bxe4 17. Rxe4 Ng6 18. h4 Qc5 19. b4 Qxc3 20. Ne2 Qf3 21. Qd4 Qf5 22. h5 Qxh5 23. c4 Qf5 24. Rg4 Ne5 25. Rf4 Nf3+ 26. Rxf3 Qxf3 27. Nf4 Rf6 28. Re1 Rh6 29. Ng2 Qb7 30. f4 a6 31. f5 axb5 32. fxe6 dxe6 33. Qd8+ Kf7 34. Rf1+ Rf6 35. Rxf6+ gxf6 36. Qd1 bxc4 37. Qh5+ Kg7 38. Qg4+ Kf8 39. Qxe6 Ra1+ 40. Kh2 Qc6 41. Qf5 Ra2 42. Qf1 Nd7 43. Kh3 c3 44. Nf4 c2 45. Qc1 Ra1 46. Qxa1 c1Q 47. Qxc1 Qxc1 48. Ne6+ Ke7 49. Ng7 Qh6+ 50. Nh5 Qxh5+ 51. Kg2 Ne5 52. b5 Qf3+ 53. Kg1 Nd3 54. g4 Ne1 55. Kh2 Qg2# 0-1

[Event "NED-ch U16 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "3"]
[White "Chang, Hawkie"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1757"]
[BlackElo "1402"]
[PlyCount "31"]
[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 b6 3. c4 Bb7 4. Nc3 Bb4 5. Bd3 Ne7 6. Nge2 0-0 7. a3 Bxc3+ 8. Nxc3 f5 9. 0-0 c5 10. d5 fxe4 11. Bxe4 Nf5 12. dxe6 Bxe4 13. Nxe4 dxe6 14. Ng5 Qe8 15. Qe2 Nd4 16. Qe4 1-0

[Event "NED-ch U16 op"]
[Site "Borne"]
[Date "2013.08.06"]
[Round "2"]
[White "Dubbeldam, Mathijs"]
[Black "Borm, Bart"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1402"]
[BlackElo "1393"]
[PlyCount "48"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. Nc3 Bf5 5. Bf4 e6 6. Bb5+ Nd7 7. Nf3 a6 8. Bxd7+ Qxd7 9. Ne5 Qd8 10. Qh5 g6 11. Qd1 f6 12. Nd3 Qb6 13. 0-0 Qxd4 14. Be3 Qc4 15. Nc1 Rd8 16. N1e2 e5 17. b3 Qc6 18. Bc1 d4 19. Nb1 Qxc2 20. f4 Qxd1 21. Rxd1 Bc5 22. Kf1 d3 23. Ng3 Bg4 24. Re1 Bd4 0-1

[Event "NED-ch U16 op"]
[Site "Borne"]
[Date "2013.08.05"]
[Round "1"]
[White "Roesink, Myron"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1809"]
[BlackElo "1402"]
[PlyCount "54"]
[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 b6 3. Bd3 Bb7 4. Nf3 c5 5. c3 Nf6 6. Bg5 Be7 7. e5 Nd5 8. Bxe7 Qxe7 9. 0-0 Nc6 10. Nbd2 cxd4 11. Ne4 0-0 12. Nd6 Bc8 13. cxd4 f6 14. Be4 fxe5 15. dxe5 Nf4 16. Qc2 h6 17. g3 Nh3+ 18. Kg2 Ng5 19. Nh4 Nxe5 20. Bxa8 Qxd6 21. Rad1 Qb8 22. Bd5 exd5 23. Rfe1 d4 24. Rxe5 Qxe5 25. Ng6 Qd5+ 26. Kf1 Qh1+ 27. Ke2 Re8+ 0-1

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.30"]
[Round "5"]
[White "Lavrijsen, Barend"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "C00"]
[BlackElo "1307"]
[PlyCount "72"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. e5 b6 3. d4 Bb7 4. Nf3 c5 5. Be2 cxd4 6. Qxd4 Nc6 7. Qg4 Qc7 8. Qg5 Nb4 9. Na3 Nxc2+ 10. Nxc2 Qxc2 11. Qd2 Qg6 12. 0-0 f6 13. Nh4 Qf7 14. exf6 Nxf6 15. Bf3 Nd5 16. Re1 Bb4 17. Qe2 Bxe1 18. Qxe1 0-0 19. Be4 Rac8 20. Nf3 h6 21. Ne5 Qe8 22. Bg6 Qd8 23. g3 Ne7 24. Bh5 Rc2 25. Be3 Rf5 26. Nf7 Rxf7 27. Bxf7+ Kxf7 28. Bd4 Nf5 29. Bc3 Bf3 30. Qe5 Qg5 31. Bb4 d6 32. Qb5 Rc1+ 33. Rxc1 Qxc1+ 34. Qf1 Qxb2 35. a3 Nd4 36. Bxd6 Ne2+ 0-1

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.30"]
[Round "6"]
[White "Moussane, Mohammed"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[BlackElo "1307"]
[PlyCount "50"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 b6 3. Nf3 Bb7 4. Nc3 Bb4 5. Bd3 Ne7 6. Bd2 0-0 7. a3 Bxc3 8. Bxc3 f5 9. e5 Ng6 10. g4 fxg4 11. Bxg6 hxg6 12. d5 Bxd5 13. Bb4 Bxf3 14. Qd3 c5 15. Bxc5 bxc5 16. Rg1 Nc6 17. Qxg6 Nxe5 18. Qh5 Qa5+ 19. c3 Nd3+ 20. Kd2 Nxb2 21. h3 Qb5 22. Qe5 Nc4+ 23. Kc2 Qb2+ 24. Kd3 Nxe5+ 25. Ke3 Qe2# 0-1

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "2"]
[White "Dreef, Bert"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B27"]
[BlackElo "1307"]
[PlyCount "49"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 b6 3. Nf3 Bb7 4. Bd3 c5 5. 0-0 cxd4 6. Nxd4 Bc5 7. Be3 Ne7 8. Nc3 0-0 9. Qg4 Ng6 10. Qg3 Nc6 11. Nxc6 Bxc6 12. Rad1 Kh8 13. Bxc5 bxc5 14. Bb5 Qb6 15. Bxc6 Qxc6 16. Rd6 Qb7 17. b3 f5 18. Rfd1 Rad8 19. Na4 Qc7 20. Qe3 fxe4 21. Nxc5 Rf7 22. Nxe6 dxe6 23. Rxd8+ Rf8 24. Rxf8+ Nxf8 25. c4 1-0

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "4"]
[White "Dubbeldam, Mathijs"]
[Black "Bergshoeff, Bert"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1307"]
[BlackElo "1714"]
[PlyCount "33"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 Bb4 7. Bg5 d6 8. 0-0 0-0 9. Nd5 Bc5 10. Nxc6 bxc6 11. Nxf6+ gxf6 12. Bh6 Re8 13. Qf3 Kh8 14. Bxf7 Re5 15. Qg3 Rg5 16. Bxg5 fxg5 17. Qc3+ 1-0

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.29"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Vlad, Mihnea"]
[Result "0-1"]
[ECO "C28"]
[WhiteElo "1307"]
[PlyCount "30"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Bb4 5. d3 d6 6. 0-0 Bg4 7. Bg5 Nd4 8. Nd5 h6 9. Bxf6 gxf6 10. Nxb4 f5 11. exf5 Nxf3+ 12. gxf3 Bh3 13. f4 Rg8+ 14. Kh1 Bg2+ 15. Kg1 Bf3# 0-1

[Event "Haarlem Nova College op-C 12th"]
[Site "Haarlem"]
[Date "2013.06.28"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Cornelissen, Milo"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "1307"]
[PlyCount "94"]
[EventDate "2013.06.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Bc5 6. Nf3 Nge7 7. Nc3 b6 8. Bf4 Bb7 9. Bd3 Nb4 10. Na4 Nxd3+ 11. Qxd3 Bb4+ 12. Nc3 0-0 13. a3 Bxc3+ 14. bxc3 Ng6 15. Bd6 Re8 16. 0-0 Rc8 17. Rab1 Rc6 18. c5 e5 19. cxb6 axb6 20. Rfd1 Qc8 21. Rbc1 f6 22. Bb4 Nf4 23. Qd2 Ba6 24. Kh1 Nd3 25. Rc2 Nxb4 26. axb4 Rd8 27. Nh4 Bc4 28. Nf5 Kf8 29. Nd6 Qc7 30. Nxc4 Rxc4 31. Qd6+ Qxd6 32. Rxd6 Rc6 33. Rd5 Ke7 34. c4 d6 35. c5 bxc5 36. bxc5 Rxc5 37. Rcxc5 dxc5 38. Rxd8 Kxd8 39. Kg1 Kd7 40. Kf1 Ke6 41. Ke2 f5 42. f3 fxe4 43. fxe4 c4 44. Kd2 Kd6 45. Kc3 Kc5 46. g3 g6 47. h3 h6 0-1

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.05.05"]
[Round "9"]
[White "Loos, Cisko"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A02"]
[BlackElo "1320"]
[PlyCount "71"]
[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. f4 b6 2. Nf3 Bb7 3. e3 e6 4. g3 Nf6 5. Bg2 Nc6 6. b3 d5 7. 0-0 Qd7 8. Bb2 0-0-0 9. d3 Rg8 10. Ne5 Qe8 11. Qf3 Bc5 12. a3 h5 13. b4 Be7 14. c4 Ng4 15. Nxc6 Bxc6 16. h3 Nh6 17. b5 Bb7 18. a4 Bb4 19. Bc3 Qe7 20. Rc1 Nf5 21. Nd2 Bxc3 22. Rxc3 Nxe3 23. Qxe3 d4 24. Bxb7+ Kb8 25. Qf3 dxc3 26. Nb3 Rd7 27. a5 Qb4 28. Ba6 c6 29. bxc6 Rc7 30. Qd1 Rd8 31. Bb5 Qd6 32. axb6 axb6 33. Ra6 Qxd3 34. Rxb6+ Ka7 35. Qa1+ Kxb6 36. Qa5# 1-0

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.05.04"]
[Round "8"]
[White "Dubbeldam, Mathijs"]
[Black "Keuning, Selwin"]
[Result "0-1"]
[ECO "B44"]
[WhiteElo "1320"]
[PlyCount "102"]
[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. c4 Nc6 3. Nf3 e6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 Qa5 7. Nxc6 dxc6 8. Bd3 Bc5 9. 0-0 0-0 10. Bd2 Qc7 11. Kh1 e5 12. f4 Rd8 13. fxe5 Bg4 14. Qe1 Qxe5 15. Bc2 Qh5 16. Bf4 Re8 17. Qg3 Be6 18. b3 Qg4 19. Rad1 Qxg3 20. Bxg3 Ng4 21. Rf3 Rad8 22. Rxd8 Rxd8 23. h3 Rd2 24. hxg4 Rxc2 25. Rd3 h6 26. Be5 f6 27. Bf4 Bxg4 28. Rd8+ Kf7 29. Na4 Bb4 30. Rb8 b6 31. Rb7+ Kg6 32. a3 Bxa3 33. Rxa7 b5 34. cxb5 cxb5 35. Nb6 Bc5 36. Rc7 Bd1 37. Nd5 Bd4 38. Rd7 Bc5 39. b4 Bf8 40. Ne3 Rf2 41. Bg3 Re2 42. Nxd1 Rxe4 43. Nc3 Re3 44. Bd6 Bxd6 45. Rxd6 Rxc3 46. Rb6 Rb3 47. Rxb5 f5 48. Kg1 Kg5 49. Rb8 Kg4 50. Kh2 g5 51. b5 Rb2 0-1

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.05.03"]
[Round "7"]
[White "Koster, Chiel"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[BlackElo "1320"]
[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. Nc3 b6 2. d4 e6 3. e4 Bb7 4. Nf3 Bb4 5. Bd3 Ne7 6. Bd2 0-0 7. a3 Bxc3 8. Bxc3 f5 9. Qe2 fxe4 10. Bxe4 Bxe4 11. Qxe4 Nbc6 12. 0-0-0 Nd5 13. Bd2 Qf6 14. Be3 h6 15. c4 Nf4 16. Ne1 d5 17. Qc2 dxc4 18. Qxc4 Na5 19. Qc2 Nd5 20. Nd3 Rac8 21. Kb1 Qg6 22. g3 c5 23. dxc5 Nxe3 24. fxe3 bxc5 25. Nf4 Qxc2+ 26. Kxc2 e5 27. Nd3 e4 28. Nf4 Nc4 29. Rhe1 Rb8 30. Rb1 Rfd8 31. h4 Rd2+ 32. Kc3 Rdxb2 33. Rxb2 Nxb2 34. Ne6 Nd3 35. Rd1 a5 36. Kc4 Nb2+ 0-1

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.05.02"]
[Round "6"]
[White "Damen, Jip"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1687"]
[BlackElo "1320"]
[PlyCount "43"]
[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. d4 b6 3. Nc3 Bb7 4. Nf3 Bb4 5. Bd3 Ne7 6. Bd2 0-0 7. a3 Bxc3 8. Bxc3 f5 9. Qe2 Ng6 10. Bd2 Nh4 11. 0-0-0 c5 12. Bg5 Qe8 13. Bxh4 h6 14. exf5 cxd4 15. Nxd4 Nc6 16. Nxc6 Bxc6 17. fxe6 dxe6 18. Bc4 Bxg2 19. Rhg1 Bh3 20. Bg3 Rc8 21. Bd3 Qc6 22. Qe4 1-0

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.05.01"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Haver, Sjoerd"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1320"]
[BlackElo "1736"]
[PlyCount "34"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Qb3 Nf6 7. Bg5 e5 8. Bxf6 gxf6 9. Qxd5 Be6 10. Qb5 0-0-0 11. Nf3 exd4 12. h3 dxc3 13. Nxc3 a6 14. Qa4 Rxd3 15. a3 Bh6 16. Qh4 Qf4 17. Ne4 Rxf3 0-1

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.04.30"]
[Round "4"]
[White "Dubbeldam, Mathijs"]
[Black "Reichardt, Monica"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1320"]
[PlyCount "113"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 Bg4 7. Qb3 Na5 8. Qc2 Qd7 9. Nd2 e6 10. Ngf3 Bd6 11. Ne5 Qc7 12. 0-0 Bh5 13. h3 Nc6 14. g4 Bg6 15. Nxg6 hxg6 16. Bxd6 Qxd6 17. Kg2 Qf4 18. f3 Ke7 19. Rh1 Rac8 20. Qd1 Rh4 21. Nf1 Rch8 22. Qd2 Qxd2+ 23. Nxd2 Nh7 24. Kg3 Ng5 25. Bf1 f5 26. Re1 Kf6 27. Re2 Nf7 28. Nb3 b6 29. Rd2 Ng5 30. Rdh2 e5 31. dxe5+ Nxe5 32. Nd4 Ngf7 33. f4 Nc4 34. Re2 Nd8 35. g5+ Kf7 36. Bg2 Nd6 37. Bxd5+ Kf8 38. b3 Ne8 39. Nb5 a6 40. Nd4 Nc7 41. Nf3 R4h7 42. Bc4 b5 43. Bd3 Nc6 44. a4 Na5 45. axb5 axb5 46. Ne5 Rg8 47. b4 Nb7 48. Nxg6+ Kf7 49. Bxf5 Ra8 50. Re7+ Kg8 51. Rxc7 Nd8 52. Ne7+ Kh8 53. Bxh7 Kxh7 54. f5 Ra3 55. Rd1 Ra8 56. Rcd7 Rc8 57. Nxc8 1-0

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.04.29"]
[Round "3"]
[White "Looijer, Dave"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1938"]
[BlackElo "1320"]
[PlyCount "53"]
[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. d4 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Nc6 7. 0-0 Nb4 8. Nc3 Nxd3 9. Qxd3 Bd6 10. Nb5 Bb8 11. Bg5 f6 12. Bh4 Ne7 13. Bg3 Bxg3 14. hxg3 0-0 15. Rac1 Ba6 16. a4 Rc8 17. Rxc8 Nxc8 18. d5 Qe7 19. Rc1 Qb4 20. dxe6 dxe6 21. Qd7 Qxe4 22. Rc7 Qg4 23. Nh2 Qg6 24. Qxe6+ Kh8 25. Nf3 Re8 26. Qd7 Re7 27. Rxc8+ 1-0

[Event "NED-ch U17"]
[Site "Sneek"]
[Date "2013.04.27"]
[Round "1"]
[White "Zwirs, Jasper"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1937"]
[BlackElo "1320"]
[PlyCount "65"]
[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. d4 b6 3. Bd3 Bb7 4. Nf3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. 0-0 0-0 9. a3 Bxc3 10. bxc3 f5 11. Re1 h6 12. Qe2 Qe8 13. c4 Nbc6 14. d5 Na5 15. Bd2 Nb3 16. Rab1 Nc5 17. Bb4 Nxd3 18. Qxd3 fxe4 19. Qxe4 Qd8 20. Qg4 Rf6 21. Nh4 Nf5 22. Bc3 Nxh4 23. Qxh4 Rg6 24. Qe4 Qg5 25. f4 Qh5 26. Rbd1 exd5 27. cxd5 Re6 28. Qd4 Rxe1+ 29. Rxe1 Qg6 30. Re7 Qb1+ 31. Kf2 Qc2+ 32. Kf3 Qg6 33. Rxg7+ 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.06"]
[Round "9"]
[White "Dijkstra, Hidde"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1573"]
[BlackElo "1121"]
[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. d4 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bb4+ 7. Nc3 Ne7 8. 0-0 0-0 9. e5 f5 10. a3 Bxc3 11. bxc3 Qe8 12. Qd2 Qh5 13. Be2 h6 14. Ne1 Qg6 15. Bf3 Nbc6 16. a4 Nd5 17. Ba3 Rfc8 18. c4 Nc7 19. Nd3 Rab8 20. Nf4 Qg5 21. g3 Na5 22. Bxb7 Rxb7 23. Qd3 Ne8 24. Rfc1 Rbc7 25. c5 Nb7 26. cxb6 axb6 27. Rxc7 Rxc7 28. d5 Na5 29. dxe6 Nc6 30. exd7 Nxe5 31. dxe8Q+ 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.05"]
[Round "8"]
[White "Dubbeldam, Mathijs"]
[Black "Frima, Erik"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "1121"]
[BlackElo "1468"]
[PlyCount "92"]
[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. c4 Nc6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 g6 7. Be2 Bg7 8. Be3 0-0 9. 0-0 Qc7 10. h3 Ne5 11. Rc1 Be6 12. Nd5 Qd8 13. Nf4 Qd7 14. f3 a6 15. Qd2 Rac8 16. b3 Nc6 17. Ndxe6 fxe6 18. c5 d5 19. Rfd1 Rcd8 20. exd5 exd5 21. Qe1 e6 22. a4 Qe7 23. Bf2 Bh6 24. Bg3 Nd7 25. Nxd5 exd5 26. Bd6 Qe3+ 27. Kh1 Rfe8 28. Qh4 Bg5 29. Qg3 Nd4 30. Bd3 Ne6 31. b4 Bf4 32. Bxf4 Qxf4 33. Qf2 Qxb4 34. Rb1 Qd4 35. Qxd4 Nxd4 36. Rxb7 Nxc5 37. Rc7 Nxd3 38. Rxd3 Re1+ 39. Kh2 Nf5 40. Ra7 Rd6 41. Rb3 Re7 42. Rxe7 Nxe7 43. a5 d4 44. Rb6 Rxb6 45. axb6 d3 46. b7 Nc6 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.04"]
[Round "7"]
[White "Dubbeldam, Mathijs"]
[Black "Laan, Jorick"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1121"]
[BlackElo "1832"]
[PlyCount "116"]
[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. exd5 exd5 4. d4 Bg4 5. Be3 Nf6 6. Be2 Bd6 7. 0-0 Nbd7 8. Re1 c6 9. Bd3 0-0 10. Nbd2 Qc7 11. Qc1 b5 12. c3 a5 13. Qc2 Rab8 14. Rac1 Bh5 15. h3 c5 16. dxc5 Nxc5 17. Kh1 Bg6 18. Bxg6 fxg6 19. Ng5 Nh5 20. Bxc5 Qxc5 21. Ne6 Qxf2 22. Nxf8 Rxf8 23. Nf3 Ng3+ 24. Kh2 Ne4+ 25. Kh1 Rxf3 26. Qxf2 Rxf2 27. Red1 Nf6 28. Rb1 Kf7 29. Kg1 Bc5 30. Kh1 Bb6 31. Kh2 g5 32. Kg3 h6 33. Rf1 Re2 34. Kf3 Re3+ 35. Kf2 Rxc3+ 36. Ke2 Rc2+ 37. Kf3 Kg6 38. Kg3 Nh5+ 39. Kh2 Nf4 40. Kh1 Rxg2 41. Rxf4 gxf4 42. Kxg2 Kf5 43. Re1 Be3 44. Kf3 g5 45. Rd1 d4 46. Rd3 h5 47. Rb3 g4+ 48. hxg4+ hxg4+ 49. Kg2 b4 50. a3 Bd2 51. Rd3 f3+ 52. Kf2 Be3+ 53. Rxe3 dxe3+ 54. Kxe3 bxa3 55. bxa3 Ke5 56. a4 Kd5 57. Kf2 Kc4 58. Kg3 Kb4 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.03"]
[Round "6"]
[White "Zevenhuizen, Daniel"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "1798"]
[BlackElo "1121"]
[PlyCount "53"]
[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. Nf3 d5 2. g3 Nc6 3. Bg2 e5 4. d3 Be6 5. 0-0 Nf6 6. Nbd2 Be7 7. c3 h6 8. Qc2 Qd7 9. b4 b5 10. a4 Bh3 11. axb5 Bxg2 12. Kxg2 Nd8 13. Nxe5 Qxb5 14. Ndf3 Ne6 15. Ra5 Qb6 16. Qa4+ Kf8 17. Rxd5 c6 18. Be3 Qb7 19. Ra5 Nd5 20. Qxc6 Qxc6 21. Nxc6 Nxc3 22. Nxe7 Kxe7 23. Bc5+ Kf6 24. Bd6 Nxe2 25. Re1 N2d4 26. Nxd4 Nxd4 27. Be5+ 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.02"]
[Round "5"]
[White "Van Heusden, David"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1613"]
[BlackElo "1121"]
[PlyCount "68"]
[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 b6 3. Nc3 Bb7 4. Nf3 Bb4 5. Bd3 Ne7 6. Bd2 0-0 7. a3 Bxc3 8. bxc3 f5 9. e5 Ng6 10. 0-0 Nh4 11. Be2 Ng6 12. Bg5 Qe8 13. Re1 Nc6 14. Bc4 Nce7 15. Bd2 f4 16. Ng5 Nh4 17. Qg4 Nxg2 18. Rf1 h6 19. Bxe6+ dxe6 20. Nxe6 Qg6 21. Qxg6 Nxg6 22. Nxf8 Rxf8 23. c4 Bf3 24. e6 Rf5 25. Rfc1 Rg5 26. Kf1 a5 27. Rab1 N6h4 28. Rb3 Kf8 29. Rcb1 Ke7 30. d5 Re5 31. Bc3 Be2+ 32. Kg1 Rg5 33. Kh1 Bf3 34. h3 Ne3+ 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.05.01"]
[Round "4"]
[White "Dubbeldam, Mathijs"]
[Black "Damen, Jip"]
[Result "0-1"]
[ECO "B09"]
[WhiteElo "1121"]
[BlackElo "1752"]
[PlyCount "76"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 0-0 6. Bd3 c6 7. 0-0 Nbd7 8. e5 dxe5 9. fxe5 Nd5 10. Nxd5 cxd5 11. c3 Qb6 12. Kh1 f6 13. Qe2 fxe5 14. dxe5 Nxe5 15. Be3 Qd6 16. Nxe5 Rxf1+ 17. Rxf1 Bxe5 18. Bh6 Be6 19. Re1 Bf5 20. Bxf5 gxf5 21. Qh5 Qf6 22. Bg5 Qd6 23. Qe2 Bxh2 24. Qd3 e6 25. Re3 e5 26. Qxf5 Rf8 27. Qg4 h5 28. Be7+ hxg4 29. Bxd6 Bf4 30. Rd3 e4 31. Rxd5 Rd8 32. Bxf4 Rxd5 33. g3 Kf7 34. Kg2 Ke6 35. Kf2 Kf5 36. Ke3 Rd3+ 37. Ke2 a6 38. a3 Rf3 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.04.30"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Cox, Jan"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "1121"]
[BlackElo "2006"]
[PlyCount "54"]
[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. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. e5 Nd7 9. Bf4 0-0 10. 0-0 Nc5 11. Be2 Ne6 12. Bg3 f6 13. a3 Bc5 14. Bd3 f5 15. h3 Qg5 16. Kh1 f4 17. Bh2 f3 18. gxf3 Nf4 19. Rg1 Qh5 20. Bxf4 Rxf4 21. Rg2 Rxf3 22. Qg1 Rxh3+ 23. Rh2 Bg4 24. Bf1 Bf3+ 25. Bg2 Bxf2 26. Rxh3 Qxh3+ 27. Qh2 Bxg2# 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2012.04.28"]
[Round "1"]
[White "Zwirs, Jasper"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1896"]
[BlackElo "1121"]
[PlyCount "33"]
[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 b6 3. Nf3 Bb7 4. Bd3 c5 5. c3 cxd4 6. cxd4 Bd6 7. 0-0 Ne7 8. Nc3 0-0 9. Bg5 Nbc6 10. Rc1 h6 11. Bh4 Bf4 12. Ra1 Rc8 13. e5 Qe8 14. Ne4 Nf5 15. Bb1 Na5 16. Qd3 Bc1 17. Nd6 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.08"]
[Round "9"]
[White "Dubbeldam, Mathijs"]
[Black "Dengiz, Furkan"]
[Result "0-1"]
[ECO "B54"]
[WhiteElo "1101"]
[BlackElo "1563"]
[PlyCount "58"]
[EventDate "2011.04.30"]
[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. c4 Nc6 3. Nc3 d6 4. Nf3 Nf6 5. d4 cxd4 6. Nxd4 e6 7. Bg5 Be7 8. Nf3 Qc7 9. Bd3 0-0 10. 0-0 a6 11. Qc2 e5 12. Nd5 Nxd5 13. exd5 Nb4 14. Bxh7+ Kh8 15. Qe4 f6 16. Bxf6 Rxf6 17. a3 Rf4 18. Qb1 Qxc4 19. axb4 Qxd5 20. Ra3 Rxb4 21. Rd1 Qe6 22. Nd2 Bd7 23. Rf3 Rf8 24. Rxf8+ Bxf8 25. Nf3 Be7 26. Be4 Bc6 27. Bf5 Qb3 28. Qd3 Qxd3 29. Bxd3 e4 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.06"]
[Round "7"]
[White "Engelberts, Robin"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1826"]
[BlackElo "1101"]
[PlyCount "41"]
[EventDate "2011.04.30"]
[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 b6 3. Nc3 Bb7 4. Be3 Bb4 5. Qd2 Bxe4 6. a3 Bxc3 7. Qxc3 Ne7 8. f3 Bb7 9. Qd2 d6 10. Bd3 Nd7 11. h4 Nd5 12. Be4 Ba6 13. Bg5 f6 14. Bf4 Rc8 15. Nh3 Nxf4 16. Nxf4 Qe7 17. 0-0-0 0-0 18. Rde1 e5 19. h5 f5 20. Bd5+ Kh8 21. Ng6+ 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.05"]
[Round "6"]
[White "Dubbeldam, Mathijs"]
[Black "Van den Bergh, Dennis"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1101"]
[BlackElo "1402"]
[PlyCount "126"]
[EventDate "2011.04.30"]
[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. c4 d6 3. Nc3 Nc6 4. Nf3 Bg4 5. Be2 e6 6. d3 Nge7 7. Be3 Ng6 8. d4 Bxf3 9. Bxf3 cxd4 10. Bxd4 Nxd4 11. Qxd4 Ne5 12. Be2 Nc6 13. Qe3 Be7 14. 0-0-0 0-0 15. c5 e5 16. Kb1 Nd4 17. cxd6 Bxd6 18. h4 Qb6 19. Nd5 Qa5 20. Bd3 b5 21. Rh3 Kh8 22. h5 h6 23. g4 Qd8 24. Rg1 Bc5 25. Qd2 Qg5 26. Qxg5 hxg5 27. h6 a6 28. Rgh1 g6 29. Nf6 Rfd8 30. Rf1 Ne6 31. Bc2 Nf4 32. Rh2 Be7 33. Nd5 Nxd5 34. exd5 Rxd5 35. Bb3 Rd4 36. f3 f5 37. Bf7 Kh7 38. gxf5 gxf5 39. Be6 Rf4 40. Rd1 Rxf3 41. Bd5 e4 42. Bxa8 Bf8 43. Rc1 Bd6 44. Bd5 Bxh2 45. Rc8 Be5 46. Re8 Rf1+ 47. Kc2 Rf2+ 48. Kb3 Rxb2+ 49. Ka3 Rf2 50. Rxe5 Kxh6 51. Re6+ Kh5 52. Rxa6 e3 53. Re6 f4 54. Re8 e2 55. Rxe2 Rxe2 56. Bf3+ g4 57. Bxe2 f3 58. Bxb5 g3 59. Kb2 g2 60. a4 g1Q 61. a5 Qc5 62. Be8+ Kg5 63. a6 Qb6+ 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.04"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Hegge, Freek"]
[Result "1-0"]
[ECO "B15"]
[WhiteElo "1101"]
[BlackElo "1338"]
[PlyCount "47"]
[EventDate "2011.04.30"]
[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 d5 2. d4 c6 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 e6 6. Bd3 c5 7. Bf4 c4 8. Be2 Nc6 9. 0-0 Be7 10. b3 Na5 11. bxc4 Nxc4 12. Rb1 a6 13. Bd3 0-0 14. Qc1 Ba3 15. Qd1 b5 16. Ng5 h6 17. Qh5 Nb2 18. Bh7+ Kh8 19. Ne2 Nc4 20. Rb3 Be7 21. Rg3 Qe8 22. Nxf7+ Qxf7 23. Bg6 Qg8 24. Bxh6 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.03"]
[Round "4"]
[White "Van Zoest, Mustafa"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1421"]
[BlackElo "1101"]
[PlyCount "41"]
[EventDate "2011.04.30"]
[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 b6 3. Nf3 Bb7 4. Bd3 c5 5. 0-0 Nf6 6. Re1 cxd4 7. Nxd4 Bc5 8. Nb3 Qc7 9. N1d2 0-0 10. e5 Nd5 11. Nc4 d6 12. exd6 Bxd6 13. Nxd6 Qxd6 14. c4 Nb4 15. Bxh7+ Kxh7 16. Qxd6 N8c6 17. Be3 Nc2 18. Qd3+ g6 19. Qxc2 Ne5 20. Bd4 Ng4 21. h3 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.02"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Stolwijk, Colin"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1101"]
[BlackElo "1776"]
[PlyCount "60"]
[EventDate "2011.04.30"]
[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 c6 2. d4 d5 3. e5 Bf5 4. Nc3 e6 5. g4 Bg6 6. Nge2 Be7 7. Nf4 Bg5 8. Bd3 Nd7 9. Be3 a6 10. Ng2 Bxe3 11. Nxe3 c5 12. Bxg6 hxg6 13. Ne2 cxd4 14. Qxd4 Ne7 15. Nf4 Nc6 16. Qd2 Ndxe5 17. 0-0-0 Qg5 18. Neg2 Nc4 19. Qe2 Qe5 20. c3 Qxe2 21. Nxe2 N6e5 22. h3 Nd6 23. Ne3 Ne4 24. Rdf1 Nxf2 25. Rh2 Nfxg4 26. Nxg4 Nxg4 27. Rhh1 Ne3 28. Rf4 e5 29. Rb4 0-0-0 30. Kd2 Nf5 0-1

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.05.01"]
[Round "2"]
[White "Van Harten, Maarten"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[WhiteElo "1754"]
[BlackElo "1101"]
[PlyCount "43"]
[EventDate "2011.04.30"]
[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. Nf3 b6 3. Nc3 Bb7 4. d4 Bb4 5. Bd3 c5 6. 0-0 cxd4 7. Nb5 Nc6 8. Nbxd4 Nxd4 9. Nxd4 Qc7 10. Kh1 Nf6 11. f3 a6 12. Qe2 0-0 13. c3 Bd6 14. f4 e5 15. Nf5 Rfe8 16. Nxd6 Qxd6 17. Qc2 exf4 18. Bxf4 Qe6 19. e5 Ng4 20. Bf5 Qc4 21. Bxg4 d6 22. b3 1-0

[Event "NED-ch U15"]
[Site "Haarlem"]
[Date "2011.04.30"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Lai, Hing Ting"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1101"]
[BlackElo "1813"]
[PlyCount "58"]
[EventDate "2011.04.30"]
[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. Nc3 d5 3. exd5 exd5 4. d4 c6 5. Nf3 Bd6 6. Bd3 Ne7 7. 0-0 Bg4 8. Re1 Nd7 9. a3 Qc7 10. Be2 f6 11. b4 0-0 12. b5 Bxf3 13. Bxf3 Bxh2+ 14. Kh1 Bd6 15. Qd3 Rae8 16. a4 f5 17. Ba3 Bxa3 18. Rxa3 Nf6 19. Ne2 Ne4 20. Kg1 Rf6 21. c4 Rh6 22. g3 Kh8 23. Nf4 Ng6 24. Nxg6+ hxg6 25. a5 Rc8 26. b6 axb6 27. axb6 Qxb6 28. Rb1 Qc7 29. Ra7 dxc4 0-1

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.23"]
[Round "9"]
[White "Dubbeldam, Mathijs"]
[Black "Van den Bosch, Arno"]
[Result "0-1"]
[ECO "D00"]
[BlackElo "1467"]
[PlyCount "60"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. f3 exf3 5. Qxf3 Nc6 6. Bb5 Bd7 7. Be3 e6 8. 0-0-0 Bd6 9. Bg5 0-0 10. Bxc6 Bxc6 11. d5 exd5 12. Nxd5 Bxd5 13. Rxd5 h6 14. Bh4 Bf4+ 15. Qxf4 Qxd5 16. Bxf6 gxf6 17. Nf3 Qh5 18. g4 Qg6 19. h4 Rfe8 20. h5 Qg7 21. Rg1 Kf8 22. Qb4+ Kg8 23. Qf4 Kh8 24. g5 fxg5 25. Qxc7 Rec8 26. Qe5 Qxe5 27. Nxe5 Kg8 28. Rf1 Rc7 29. c3 Re8 30. Ng4 Re1+ 0-1

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.22"]
[Round "8"]
[White "Beukema, Louise"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1433"]
[PlyCount "66"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 b6 3. Nf3 Bb7 4. d4 Bb4 5. d5 h6 6. Bd2 Nf6 7. Qc1 Qe7 8. a3 Bxc3 9. Bxc3 exd5 10. Qf4 Qxe4+ 11. Qxe4+ dxe4 12. Nd4 Nc6 13. Nf5 Rg8 14. Bxf6 gxf6 15. Nxh6 Rg6 16. Nf5 0-0-0 17. Bb5 Rxg2 18. h4 Rdg8 19. Bxc6 Bxc6 20. Ne7+ Kb7 21. Nxg8 Rxg8 22. Rh3 Rg1+ 23. Ke2 Rxa1 24. Ke3 d5 25. f3 exf3 26. Kf2 d4 27. h5 Rc1 28. h6 Rxc2+ 29. Kg3 f2 30. h7 f1Q 31. h8Q Rg2+ 32. Kh4 Qf4+ 33. Kh5 Qg5# 0-1

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.21"]
[Round "7"]
[White "Snoeks, Pieter Jan"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A47"]
[PlyCount "61"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 b6 3. e3 Bb7 4. b3 Nf6 5. Bb2 Nc6 6. Nbd2 Nd5 7. c4 Nf6 8. Be2 Nb4 9. a3 Na6 10. 0-0 c5 11. Bd3 Qc7 12. Re1 Bd6 13. e4 cxd4 14. e5 Bc5 15. exf6 gxf6 16. Nxd4 Qd6 17. N2f3 Qf4 18. Qd2 Qg4 19. Bf5 Qg7 20. Be4 0-0-0 21. Bxb7+ Kxb7 22. b4 Rhg8 23. g3 Bxd4 24. Qxd4 e5 25. Qd5+ Kb8 26. Nxe5 Nc7 27. Nxd7+ Kc8 28. Nxb6+ axb6 29. Qf5+ Rd7 30. Rad1 Qg5 31. Qxd7+ 1-0

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.20"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Maes, Tibo"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "67"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[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 Nc6 6. Nf3 g6 7. 0-0 Bg7 8. d3 0-0 9. Bf4 h6 10. Qd2 Kh7 11. Rfe1 Na5 12. Be5 Nxb3 13. axb3 f6 14. Bd4 e5 15. Bc5 Re8 16. Qe3 Be6 17. Rad1 Nc8 18. d4 Bd7 19. dxe5 fxe5 20. Nxe5 Bxe5 21. f4 Bd4 22. Qxd4 Rxe1+ 23. Rxe1 b6 24. Qd5 Nd6 25. Bxd6 cxd6 26. Qxd6 Bf5 27. Qe7+ Qxe7 28. Rxe7+ Kg8 29. Ne4 Kf8 30. Re5 Re8 31. Rxe8+ Kxe8 32. Nd6+ Kd7 33. Nxf5 gxf5 34. Kf2 1-0

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.20"]
[Round "6"]
[White "Dubbeldam, Mathijs"]
[Black "Maesschalck, Vincent"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "51"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Bc4 d6 4. Bf4 a6 5. a4 e6 6. Nc3 Ne7 7. Qd2 0-0 8. Bh6 Bxh6 9. Qxh6 f5 10. Nf3 Nec6 11. Ng5 Qe7 12. 0-0-0 Qg7 13. Qxg7+ Kxg7 14. Bxe6 h6 15. Bxc8 Rxc8 16. Ne6+ Kf7 17. exf5 gxf5 18. Rhe1 Nd7 19. Nd5 b5 20. a5 Ra7 21. Nef4 Nf6 22. Nxf6 Kxf6 23. Nd5+ Kg5 24. Rd3 Kg6 25. Rc3 Nxd4 26. Ne7+ 1-0

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.19"]
[Round "4"]
[White "Snoeck, Jolien"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[PlyCount "56"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 b6 3. Nc3 Bb7 4. Bc4 Bb4 5. a3 Bxc3 6. dxc3 Bxe4 7. 0-0 Nf6 8. Bg5 h6 9. Bh4 Nc6 10. Bb5 Qe7 11. Bxc6 Bxc6 12. h3 0-0-0 13. Re1 g5 14. Bg3 Ne4 15. Be5 Rhg8 16. Nd4 Bb7 17. Nb5 d6 18. Nxa7+ Kb8 19. Nb5 dxe5 20. Qe2 Rd2 21. Qc4 Nxf2 22. Rac1 Nxh3+ 23. gxh3 Rg2+ 24. Kh1 Rg4+ 25. Kh2 Rxc4 26. Rxe5 g4 27. Kg3 gxh3+ 28. Kxh3 Qh4# 0-1

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.18"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Marchal, Anais"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "99"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Nc3 Nf6 7. Bg5 Be7 8. 0-0-0 Be6 9. Bc4 0-0 10. Bd3 h6 11. Bh4 c5 12. Qa4 a5 13. e5 Bd7 14. Qf4 Ng4 15. Bxe7 Qxe7 16. exd6 Qd8 17. h3 Nf6 18. g4 Bc6 19. Rhg1 Nd5 20. Nxd5 Bxd5 21. Qf5 Qg5+ 22. f4 Qxf5 23. Bxf5 Bf3 24. Rd2 g6 25. Bd3 Rad8 26. Bb5 Bc6 27. Bxc6 bxc6 28. h4 Rfe8 29. h5 g5 30. fxg5 hxg5 31. Kd1 Re6 32. d7 Re7 33. Rh1 Rdxd7 34. a3 Rxd2+ 35. Kxd2 Kh7 36. Re1 Rxe1 37. Kxe1 f6 38. Ke2 Kg7 39. Ke3 f5 40. gxf5 Kf6 41. h6 Kf7 42. Kf3 Kg8 43. Kg4 Kh7 44. Kxg5 c4 45. f6 Kg8 46. Kg6 a4 47. f7+ Kf8 48. Kf6 c5 49. h7 c3 50. h8R# 1-0

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.18"]
[Round "2"]
[White "Rauw, Arthur"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "57"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 b6 3. Nf3 Bb7 4. g3 Bb4 5. d3 Ne7 6. Bh3 0-0 7. a3 Bxc3+ 8. bxc3 f5 9. exf5 Nxf5 10. 0-0 Nc6 11. Re1 Qf6 12. d4 Nh4 13. gxh4 Qxf3 14. Qxf3 Rxf3 15. Bg2 Rxc3 16. Ra2 Rf8 17. d5 exd5 18. Bxd5+ Kh8 19. Bb2 Nb4 20. Bxc3 Nxd5 21. Be5 Kg8 22. c4 Ne7 23. Bxc7 Nf5 24. h5 d6 25. c5 dxc5 26. a4 Nd4 27. Re3 Rf5 28. Bb8 Kf8 29. Bd6+ 1-0

[Event "BEL-ch U14"]
[Site "Houffalize"]
[Date "2011.04.17"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Ramacker, Quinten"]
[Result "0-1"]
[ECO "B10"]
[BlackElo "1727"]
[PlyCount "56"]
[EventDate "2011.04.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. b3 d5 3. Bb2 dxe4 4. Nc3 Bf5 5. Qe2 Nf6 6. 0-0-0 Bg4 7. f3 exf3 8. Nxf3 Nbd7 9. h3 Bh5 10. g4 Bg6 11. Qe3 Qb6 12. Re1 Qxe3 13. Rxe3 e6 14. Bd3 Bc5 15. Bxg6 Bxe3 16. Bxf7+ Kxf7 17. dxe3 h6 18. g5 hxg5 19. Nxg5+ Ke7 20. Ne2 Rh5 21. h4 Rah8 22. Nf4 Rxg5 23. hxg5 Rxh1+ 24. Kd2 Rh2+ 25. Kd3 Nd5 26. Ng6+ Kf7 27. Ne5+ Nxe5+ 28. Bxe5 Rg2 0-1

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.24"]
[Round "7"]
[White "Dubbeldam, Mathijs"]
[Black "Dijkstra, Hidde"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1002"]
[BlackElo "1368"]
[PlyCount "58"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 d5 2. d4 dxe4 3. Nc3 Nf6 4. Bc4 e6 5. a3 Nc6 6. Nge2 Be7 7. Be3 0-0 8. 0-0 b6 9. d5 exd5 10. Nxd5 Bb7 11. Ng3 Ne5 12. Be2 Nxd5 13. Bd2 Nf6 14. Qc1 Ng6 15. Nf5 Bc5 16. b4 Bd4 17. Rb1 Qd7 18. Nxd4 Qxd4 19. Rb3 Rad8 20. Bg5 h6 21. Be3 Qe5 22. c4 Rd7 23. c5 Qe6 24. Rc3 Rdd8 25. cxb6 cxb6 26. Bd2 Rc8 27. Qb2 Qd5 28. Rfc1 e3 29. Bf3 Qxd2 0-1

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.24"]
[Round "6"]
[White "Rahangmetan, Derek Jan"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "1561"]
[BlackElo "1002"]
[PlyCount "41"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. e5 b6 3. d4 Bb7 4. Nf3 f6 5. Bf4 Nc6 6. c3 fxe5 7. dxe5 Bc5 8. a3 a5 9. Bd3 Nge7 10. Nh4 d6 11. exd6 cxd6 12. Qg4 0-0 13. 0-0 Kh8 14. Bg5 Ne5 15. Qh3 Nxd3 16. Bxe7 Nxf2 17. Ng6+ Kg8 18. Qxe6+ Rf7 19. Bxd8 Ne4+ 20. Kh1 Ng5 21. Qe8+ 1-0

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.23"]
[Round "4"]
[White "De Lange, Marieke"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "B00"]
[WhiteElo "1253"]
[BlackElo "1002"]
[PlyCount "82"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 b6 3. Nf3 Bb7 4. Bc4 Bb4 5. a3 Bxc3 6. dxc3 Bxe4 7. 0-0 Nf6 8. Re1 0-0 9. Ng5 Bb7 10. Bf4 h6 11. Nf3 Nc6 12. Qd3 Ne7 13. Nd4 Ng6 14. Qg3 d6 15. Bxe6 Nxf4 16. Qxf4 fxe6 17. Nxe6 Qd7 18. Nxf8 Rxf8 19. Re3 Nd5 20. Qc4 Kh8 21. Rg3 Nf6 22. Rd1 Qc8 23. b4 Ne4 24. Rf3 Rxf3 25. gxf3 Ng5 26. Kf1 Bxf3 27. Rd4 Qh3+ 28. Ke1 d5 29. Qd3 Ne4 30. Rxd5 Qg2 31. Qf1 Qg6 32. Rd3 Qf6 33. Qh3 Nxf2 34. Rxf3 Nxh3 35. Rxf6 gxf6 36. c4 Nf4 37. a4 c5 38. c3 cxb4 39. cxb4 Nd3+ 40. Kd2 Nxb4 41. Kc3 Nc6 0-1

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.23"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Schoffelen, Jan"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1002"]
[BlackElo "1367"]
[PlyCount "53"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[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. d4 exd4 4. Nxd4 Qf6 5. Nxc6 Qxc6 6. Nc3 a6 7. Bf4 d6 8. Qd5 Bd7 9. Bc4 Be6 10. Qxc6+ bxc6 11. Be2 Nf6 12. 0-0 Be7 13. Bf3 Bd7 14. e5 dxe5 15. Bxe5 Rc8 16. Rad1 Rb8 17. Ne4 Nxe4 18. Bxe4 f6 19. Bc3 Bd6 20. Rfe1 0-0 21. h3 f5 22. Bf3 g6 23. Be2 h6 24. Bxa6 Ra8 25. Bc4+ Kh7 26. Rxd6 cxd6 27. Re7+ 1-0

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.22"]
[Round "3"]
[White "Bex, Lennert"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "1235"]
[BlackElo "1002"]
[PlyCount "67"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 e6 2. Nf3 b6 3. Bf4 Bb7 4. e3 Na6 5. a3 Nf6 6. c4 Rb8 7. Nc3 Ne4 8. Nxe4 Bxe4 9. c5 Bb7 10. cxb6 axb6 11. Rc1 Rc8 12. Bd3 c5 13. 0-0 Be7 14. Qe2 Nc7 15. dxc5 bxc5 16. Rc2 Nd5 17. Bg3 0-0 18. Rfc1 f5 19. Rc4 Bg5 20. Nxg5 Qxg5 21. Rxc5 Rce8 22. Bd6 Nc3 23. Qf1 Ne4 24. Bxe4 Bxe4 25. Bxf8 Rxf8 26. R1c3 Rf6 27. f3 Bc6 28. e4 h5 29. exf5 exf5 30. f4 Qg6 31. Rg3 Qh6 32. b4 h4 33. Rg5 h3 34. gxh3 1-0

[Event "Maastricht Limburg op-C 4th"]
[Site "Maastricht"]
[Date "2010.05.22"]
[Round "2"]
[White "Dubbeldam, Mathijs"]
[Black "Godding, Mick"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1002"]
[BlackElo "1516"]
[PlyCount "68"]
[EventDate "2010.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[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. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 0-0 8. f4 Nxd4 9. cxd4 Bb4+ 10. Nc3 d5 11. exd5 Nf5 12. Bd2 Qh4+ 13. Ke2 Nxd4+ 14. Kd3 c5 15. dxc6 Rd8 16. Nd5 Bxd2 17. Qxd2 bxc6 18. Kxd4 cxd5 19. Bb3 Qf6+ 20. Ke3 d4+ 21. Kf2 d3 22. Rhe1 Qd4+ 23. Re3 Qxf4+ 24. Kg1 Qd4 25. Kf1 Be6 26. Rae1 h6 27. Bd1 Bg4 28. Bxg4 Qxg4 29. Rxd3 Qf5+ 30. Ke2 Qg4+ 31. Kf1 Qf5+ 32. Ke2 Rxd3 33. Qxd3 Re8+ 34. Kd2 Qxd3+ 0-1

[Event "Enschede op-D U14"]
[Site "Enschede"]
[Date "2009.08.03"]
[Round "9"]
[White "Bril, Paco"]
[Black "Dubbeldam, Mathijs"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "1087"]
[BlackElo "1002"]
[PlyCount "35"]
[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. Bc4 Bc5 4. 0-0 Nf6 5. Nc3 0-0 6. d3 h6 7. Be3 Bb6 8. Bxb6 axb6 9. Nd5 d6 10. h3 Be6 11. Qd2 Nb8 12. Bb3 c6 13. Nxf6+ Qxf6 14. c4 Nd7 15. Bd1 Nc5 16. Qe3 Qf4 17. Re1 f5 18. exf5 1/2-1/2

[Event "Enschede op-D U14"]
[Site "Enschede"]
[Date "2009.08.03"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Stolwijk, Colin"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "1002"]
[BlackElo "1469"]
[PlyCount "86"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bc4 Ngf6 8. 0-0 e6 9. Bf4 Be7 10. Qd2 0-0 11. Rfe1 Nb6 12. Bb3 Nbd5 13. Be5 Rc8 14. c4 Bb4 15. Qg5 Bxe1 16. cxd5 Bxf2+ 17. Kxf2 Nxd5 18. Re1 Qxg5 19. Nxg5 f6 20. Bd6 fxg5+ 21. Bxf8 Rxf8+ 22. Kg1 Rf6 23. a4 Kf7 24. Bc4 Rf4 25. Ne2 Rg4 26. Rf1+ Ke7 27. Ng3 Ne3 28. Bxe6 Rxg3 29. hxg3 Nxf1 30. Kxf1 Kxe6 31. Ke2 Kd5 32. Ke3 a5 33. Kd2 Kxd4 34. g4 Kc4 35. Kc1 Be4 36. g3 Kb3 37. Kd1 Bf3+ 38. Kc1 Bxg4 39. Kb1 h5 40. Ka1 Kc2 41. Ka2 c5 42. Ka3 Be6 43. b3 Kb1 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.23"]
[Round "8"]
[White "Dubbeldam, Mathijs"]
[Black "Van Rees, Maurits"]
[Result "0-1"]
[ECO "B30"]
[PlyCount "36"]
[EventDate "2009.05.21"]
[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. Bc4 e6 4. Nf3 a6 5. d4 b5 6. Be2 Bb7 7. 0-0 cxd4 8. Nxd4 Bb4 9. Qd3 Nge7 10. Re1 0-0 11. Bh5 Ng6 12. a3 Bc5 13. Nde2 Qb6 14. Rf1 Nce5 15. Qg3 Rfd8 16. b4 Bd6 17. Bb2 Nc4 18. Qg4 Nxb2 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.23"]
[Round "7"]
[White "Kevlishvili, Robby"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "66"]
[EventDate "2009.05.21"]
[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 Bc5 4. Nc3 Nf6 5. d3 h6 6. 0-0 0-0 7. Be3 d6 8. h3 Be6 9. Bb3 d5 10. Bxc5 Re8 11. exd5 Nxd5 12. Ba4 Nf4 13. Bxc6 bxc6 14. Nxe5 Qg5 15. Ng4 Qxc5 16. Qf3 Ng6 17. Rac1 Rad8 18. Ne4 Qa5 19. a3 f5 20. Nxh6+ gxh6 21. Nf6+ Kh8 22. Nxe8 Rxe8 23. Qxc6 Re7 24. Rfe1 Nf4 25. Qa8+ Kh7 26. Qf8 Rg7 27. g3 Qd5 28. Re4 fxe4 29. Qxf4 exd3 30. cxd3 Bxh3 31. f3 Qxd3 32. Rxc7 Qf1+ 33. Kh2 Qg2# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.23"]
[Round "9"]
[White "Ozdemir, Sena"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "43"]
[EventDate "2009.05.21"]
[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. f4 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. Nc3 exf4 6. d4 Nf6 7. Bxf4 g6 8. 0-0 Bg7 9. Bg5 Qc8 10. Nh4 Nh5 11. Bxc6 Bxc6 12. d5 Bd7 13. Qf3 0-0 14. Be7 Bg4 15. Qf2 c5 16. dxc6 Qxc6 17. Bxf8 Rxf8 18. Nd5 Qc4 19. Ne7+ Kh8 20. c3 Qxe4 21. Rae1 Qc4 22. Qxa7 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.22"]
[Round "6"]
[White "Aarsen, Tijs"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "46"]
[EventDate "2009.05.21"]
[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. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. Bf4 Qf6 8. Qc1 d6 9. 0-0 Nge7 10. Bd5 0-0 11. Bg5 Qg6 12. Nh4 Qh5 13. e5 Nxd5 14. exd6 h6 15. Be7 Ncxe7 16. dxe7 Nxe7 17. Nf3 Bg4 18. Qe3 Nf5 19. Qe2 Rfe8 20. Qd1 Rad8 21. Nbd2 Bxc3 22. Rb1 Bxd2 23. Qb3 Bf4 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.22"]
[Round "5"]
[White "Dubbeldam, Mathijs"]
[Black "Lin, Luuk"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "50"]
[EventDate "2009.05.21"]
[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. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Bc4 Nf6 7. Nc3 Be7 8. 0-0 0-0 9. Bf4 Be6 10. Rad1 a6 11. Qe3 Bxc4 12. Rfe1 Ng4 13. Qg3 Be6 14. h3 Bh4 15. Qf3 Bxf2+ 16. Kh1 Bxe1 17. Rxe1 Qh4 18. Rf1 Bc4 19. Rd1 Nf2+ 20. Kg1 Nxd1 21. Nxd1 Qe1+ 22. Kh2 Be2 23. Qe3 Qxd1 24. Qg3 Bh5 25. Bh6 Bg6 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.22"]
[Round "4"]
[White "Majhi, Ankit"]
[Black "Dubbeldam, Mathijs"]
[Result "1-0"]
[ECO "C52"]
[PlyCount "57"]
[EventDate "2009.05.21"]
[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 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 exd4 7. 0-0 dxc3 8. Ba3 Nge7 9. Ng5 0-0 10. Qh5 h6 11. Nxf7 Rxf7 12. Bxf7+ Kf8 13. Qf5 d6 14. Qf4 Nf5 15. Bg6 c2 16. Bxf5 Qf6 17. Nd2 g6 18. Qxh6+ Kf7 19. Qh7+ Kf8 20. Bxc8 Bxd2 21. Bxb7 Re8 22. Bxc6 Re5 23. Bb2 c1Q 24. Raxc1 Bxc1 25. Bxe5 Qxe5 26. Rxc1 Qa5 27. Bd5 Ke8 28. Qf7+ Kd8 29. Bc6 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.21"]
[Round "3"]
[White "Dubbeldam, Mathijs"]
[Black "Mouhdad, Yassine"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "42"]
[EventDate "2009.05.21"]
[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. exd5 exd5 4. Nf3 c6 5. Nc3 Nf6 6. Bd3 Bd6 7. 0-0 0-0 8. Bg5 h6 9. Bh4 Bg4 10. Be2 Re8 11. a3 Nbd7 12. Qd3 Qc7 13. Bg3 Bxg3 14. fxg3 Ne4 15. Nb1 Re7 16. Nbd2 Rae8 17. Rae1 Re6 18. h3 Bxf3 19. Bxf3 Nxg3 20. Rd1 Nxf1 21. Nxf1 Nf6 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.21"]
[Round "1"]
[White "Dubbeldam, Mathijs"]
[Black "Riemens, Noud"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "46"]
[EventDate "2009.05.21"]
[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. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 Qg6 8. 0-0 d6 9. Qf3 Ne5 10. Qe2 Bh3 11. f4 Nxc4 12. Rf2 Nxe3 13. Qxe3 Bd7 14. Nd2 Bb6 15. Re1 c5 16. N4b3 a5 17. Nc1 Ra6 18. c4 0-0 19. Rf3 f6 20. Rg3 Qf7 21. f5 Bxf5 22. exf5 Nxf5 23. Nd3 Nxe3 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2009.05.21"]
[Round "2"]
[White "Hillenkamp, Melchior"]
[Black "Dubbeldam, Mathijs"]
[Result "0-1"]
[ECO "A40"]
[PlyCount "36"]
[EventDate "2009.05.21"]
[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 e6 2. c4 b6 3. e4 Bb7 4. Bd3 f5 5. e5 Bxg2 6. f3 Qh4+ 7. Kd2 Bxh1 8. Qe2 Qxd4 9. Qf1 Qxe5 10. Qf2 Bb4+ 11. Nc3 Nc6 12. a3 Bxc3+ 13. bxc3 0-0-0 14. Bb2 Qf4+ 15. Kc2 Qg5 16. Ne2 Qg2 17. Qxg2 Bxg2 18. Ng1 Ne5 0-1

