[Event "Vlissingen op 25th"]
[Site "Vlissingen"]
[Date "2023.08.07"]
[Round "4"]
[White "Van der Hagen, Loek"]
[Black "Van der Werf, Joel"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2269"]
[BlackElo "1993"]
[PlyCount "74"]
[EventDate "2023.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. c4 Be7 10. c5 0-0 11. Bd3 Na6 12. cxd6 Bxd6 13. 0-0 Nb4 14. Bb1 Qd7 15. Nxd6 Qxd6 16. Qh5 f5 17. Rd1 Nxd5 18. a4 Be6 19. Ra3 Qc6 20. Rh3 Nf6 21. Qe2 Rad8 22. Re1 e4 23. Bg5 Qxa4 24. Ra3 Qc6 25. Rc1 Qd7 26. Rxa7 h6 27. Bf4 Nd5 28. Be5 Ra8 29. Rxa8 Rxa8 30. h3 Bf7 31. Qd2 Qa4 32. Kh2 Qb4 33. Qc2 Qe7 34. Bd4 Qd6+ 35. g3 Nb4 36. Qc3 Nd5 37. Qc2 Nb4 1/2-1/2

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.23"]
[Round "4"]
[White "Van der Werf, Joel"]
[Black "Becx, Cesar"]
[Result "1/2-1/2"]
[ECO "A81"]
[WhiteElo "1871"]
[BlackElo "2091"]
[PlyCount "39"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. 0-0 0-0 6. b3 Ne4 7. Bb2 c5 8. e3 Nc6 9. Nbd2 d5 10. c4 Be6 11. Ne5 Nxe5 12. dxe5 Nxd2 13. Qxd2 dxc4 14. Qxd8 Rfxd8 15. bxc4 Bd7 16. f4 Rac8 17. e4 Ba4 18. exf5 gxf5 19. Bc3 b6 20. Rfc1 1/2-1/2

[Event "Leiden Noteboom Memorial 79th"]
[Site "Leiden"]
[Date "2019.02.22"]
[Round "1"]
[White "Van der Werf, Joel"]
[Black "Bekedam, Tyro"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "1871"]
[BlackElo "2113"]
[PlyCount "80"]
[EventDate "2019.02.22"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 5. Qb3 Qc7 6. Nc3 e6 7. Nh4 Be7 8. h3 Bh5 9. g4 Bg6 10. Nxg6 hxg6 11. Bg2 g5 12. Bd2 Nbd7 13. Rc1 Qb6 14. cxd5 exd5 15. Qc2 Rd8 16. b3 Nf8 17. Bf3 Ng6 18. Be2 0-0 19. 0-0 Rfe8 20. Bd3 Nh4 21. Na4 Qc7 22. f4 gxf4 23. exf4 Ne4 24. Be1 Ng6 25. f5 Nf4 26. Qh2 Bd6 27. Bxe4 Rxe4 28. Nc3 Ne2+ 29. Qxe2 Rxe2 30. Nxe2 Re8 31. Nc3 Qe7 32. Bf2 Qg5 33. Rfe1 Rxe1+ 34. Rxe1 Qd2 35. Re3 Kh7 36. Ne2 Qxa2 37. Ng3 Qa1+ 38. Kg2 Qxd4 39. Re7 Qb2 40. Rxb7 Bc5 0-1

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.05.05"]
[Round "7"]
[White "Reichardt, Robin"]
[Black "Van der Werf, Joel"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "1936"]
[BlackElo "1842"]
[PlyCount "81"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Bg5 c6 5. Nbd2 h6 6. Bh4 Be7 7. e3 Nbd7 8. Be2 0-0 9. 0-0 b6 10. Rc1 Bb7 11. a3 Rc8 12. b4 a5 13. Qb3 axb4 14. axb4 Ne4 15. Nxe4 dxe4 16. Bxe7 Qxe7 17. Nd2 e5 18. c5 exd4 19. exd4 bxc5 20. bxc5 Nf6 21. Rb1 Rc7 22. Rfe1 Bc8 23. Bc4 Bf5 24. Nf1 Re8 25. Ne3 Bg6 26. Qa4 Rd8 27. Red1 Qd7 28. Rb6 Kh7 29. h3 Rdc8 30. Qb3 Qe7 31. Ba6 Rd8 32. Rb7 Rdd7 33. Rb6 Rd8 34. Bc4 Bh5 35. Rd2 Nd7 36. Rb7 Nxc5 37. Rxc7 Qxc7 38. Qc2 Nd3 39. Bxd3 exd3 40. Qxd3+ Bg6 41. Qc3 1/2-1/2

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.05.04"]
[Round "6"]
[White "Van der Werf, Joel"]
[Black "Van Dael, Siem"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "1842"]
[BlackElo "2268"]
[PlyCount "59"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 c6 5. Bg2 Bd6 6. 0-0 Nbd7 7. Nbd2 0-0 8. Qc2 Re8 9. e4 Nxe4 10. Nxe4 dxe4 11. Qxe4 e5 12. dxe5 Nxe5 13. Nxe5 Bxe5 14. Qc2 Qf6 15. a4 Bf5 16. Qb3 Re7 17. a5 Rd8 18. Be3 Rd3 19. Rad1 Red7 20. Rxd3 Bxd3 21. Re1 h6 22. Bxa7 Bxb2 23. Bh3 Rd8 24. Bb6 Bd4 25. Bxd4 Qxd4 26. Rd1 Re8 27. Rxd3 Qa1+ 28. Rd1 Re1+ 29. Rxe1 Qxe1+ 30. Bf1 1-0

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.05.03"]
[Round "5"]
[White "Van Hoorn, Geert"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2008"]
[BlackElo "1842"]
[PlyCount "99"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. h4 Rb8 9. c4 Ba6 10. b3 d6 11. exd6 cxd6 12. Qxe7+ Nxe7 13. Bf4 Ng6 14. Bg3 Kd7 15. Nc3 Re8+ 16. Be2 f5 17. h5 Ne5 18. 0-0-0 Kc7 19. Rhe1 Bc8 20. Bf1 Bd7 21. c5 Re6 22. Kc2 Be7 23. Rd4 Re8 24. cxd6+ Bxd6 25. Red1 R8e7 26. b4 g5 27. hxg6 hxg6 28. Bf4 Nf7 29. Bc4 Rf6 30. Bc1 Bxb4 31. Bxf7 Bxc3 32. Bf4+ Kc8 33. Kxc3 c5 34. Rxd7 Rxd7 35. Rxd7 Kxd7 36. Bb3 Kc6 37. Kc4 Re6 38. Kd3 Re4 39. g3 Re7 40. Bg5 Rd7+ 41. Kc4 Rb7 42. Be3 Rb4+ 43. Kc3 Kb6 44. Bf7 Rg4 45. Bd5 Kb5 46. Bf4 g5 47. f3 Rxf4 48. gxf4 gxf4 49. Kb3 a5 50. a4+ 1-0

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.05.02"]
[Round "4"]
[White "Bekedam, Tyro"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "C96"]
[WhiteElo "1955"]
[BlackElo "1842"]
[PlyCount "69"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 exd4 13. cxd4 Nc6 14. d5 Nce5 15. a4 Bb7 16. Nxe5 Nxe5 17. f4 Ng6 18. Nf3 Re8 19. Be3 Rc8 20. Qd2 Rb8 21. axb5 axb5 22. b4 c4 23. Nd4 Qd7 24. Ra5 Ba8 25. Nxb5 Bd8 26. Ra7 Bb7 27. Ba4 Rxe4 28. Nc3 Qe7 29. Nxe4 Qxe4 30. Bf2 Qf5 31. Re8+ Nf8 32. Rxd8 Rxd8 33. Rxb7 Qb1+ 34. Kh2 Ra8 35. Ra7 1-0

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.05.01"]
[Round "3"]
[White "Van der Werf, Joel"]
[Black "Pols, Wiggert"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "1842"]
[BlackElo "2068"]
[PlyCount "106"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 b5 8. Nd5 Nge7 9. c4 Nxd5 10. cxd5 Nd4 11. Bd3 g6 12. Be3 Bg7 13. Nc2 0-0 14. Qd2 Nxc2+ 15. Bxc2 f5 16. f3 Bf6 17. Bd3 Bh4+ 18. Bf2 Bxf2+ 19. Qxf2 fxe4 20. Bxe4 Qa5+ 21. Qd2 Qxd2+ 22. Kxd2 Bb7 23. Rhc1 Rfc8 24. Rxc8+ Rxc8 25. Rc1 Rxc1 26. Kxc1 Kf7 27. b4 Kf6 28. Kd2 Kg5 29. Ke3 Kh4 30. f4 exf4+ 31. Kxf4 Bc8 32. Bf3 Bf5 33. h3 Bc2 34. g3+ Kxh3 35. Bg4+ Kg2 36. Bc8 h6 37. g4 g5+ 38. Ke3 Bd1 39. Bxa6 Bxg4 40. Bxb5 h5 41. Bd3 h4 42. b5 h3 43. Be4+ Kg1 44. b6 Bc8 45. Kf3 h2 46. Kg3 h1Q 47. Bxh1 Kxh1 48. a4 Kg1 49. a5 Kf1 50. a6 Bxa6 51. Kg4 Bb7 52. Kxg5 Bxd5 53. Kf6 Ba8 0-1

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.04.30"]
[Round "2"]
[White "Bueno, Mark"]
[Black "Van der Werf, Joel"]
[Result "0-1"]
[ECO "C96"]
[WhiteElo "1999"]
[BlackElo "1842"]
[PlyCount "64"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. d5 Nb6 13. b3 c4 14. b4 Nb7 15. Nbd2 a5 16. Nf1 axb4 17. cxb4 Na4 18. Re3 Bd7 19. Ng3 Qc7 20. Nf5 Bf6 21. g4 g6 22. g5 Bd8 23. Nh2 Kh8 24. Rg3 f6 25. Nh4 fxg5 26. N4f3 h6 27. h4 Kg7 28. hxg5 h5 29. Nh4 Qc8 30. f4 exf4 31. Qd4+ Kh7 32. Rg2 Bb6 0-1

[Event "NED-ch U20"]
[Site "Assen"]
[Date "2018.04.29"]
[Round "1"]
[White "Van der Werf, Joel"]
[Black "Jongste, David"]
[Result "0-1"]
[ECO "B28"]
[WhiteElo "1842"]
[BlackElo "2092"]
[PlyCount "72"]
[EventDate "2018.04.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 d5 9. Bd3 g6 10. 0-0 Bg7 11. Re1 Bg4 12. h3 Bxf3 13. Qxf3 Nc6 14. Bc2 Qd7 15. Qg3 0-0 16. f4 Rac8 17. f5 Nxd4 18. cxd4 Rxc2 19. Rf1 Rfc8 20. Bg5 Re2 21. fxg6 hxg6 22. Rf2 Qa4 23. Qg4 Rcc2 24. Rxe2 Rxe2 25. Rc1 Re4 26. Rc8+ Bf8 27. Qg3 Qxd4+ 28. Kh2 Kg7 29. Rc7 Qxe5 30. Qxe5+ Rxe5 31. Bc1 Re2 32. a3 e6 33. Bf4 Bxa3 34. Rxb7 e5 35. Rb3 Be7 36. Bg3 d4 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.07"]
[Round "9"]
[White "Kalle, Erwin"]
[Black "Van der Werf, Joel"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1862"]
[BlackElo "1702"]
[PlyCount "68"]
[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 Nc6 4. Nf3 d5 5. Bb5 Nge7 6. exd5 Nxd5 7. Bxc6+ bxc6 8. d3 Nxc3 9. bxc3 Qa5 10. Bd2 c4 11. 0-0 Bd6 12. Ng5 0-0 13. Rf3 h6 14. Ne4 Be7 15. Rh3 f5 16. Qh5 Bd7 17. Ng3 Bf6 18. d4 Bxd4+ 19. Kh1 Bxc3 20. Bxc3 Qxc3 21. Rd1 Be8 22. Qe2 Qf6 23. Qxc4 Rd8 24. Rxd8 Qxd8 25. Nf1 Qd5 26. Qa6 Qb5 27. Qxb5 cxb5 28. Ra3 Rf7 29. Ne3 Rc7 30. Kg1 Kf7 31. Kf2 Ke7 32. Ke2 g5 33. g3 Kd8 34. Kd3 Ke7 1/2-1/2

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.06"]
[Round "8"]
[White "Van der Werf, Joel"]
[Black "De Boer, Bas"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "1702"]
[BlackElo "1854"]
[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. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 5. Nc3 e6 6. h3 Bh5 7. g4 Bg6 8. Qb3 Qb6 9. Ne5 Qxb3 10. axb3 Bc2 11. c5 Bxb3 12. Bd3 Nfd7 13. Nf3 e5 14. Nd2 Bc4 15. Nxc4 dxc4 16. Bxc4 g6 17. 0-0 Bg7 18. Rd1 0-0 19. b4 b6 20. Bf1 exd4 21. exd4 bxc5 22. bxc5 Nxc5 23. dxc5 Bxc3 24. Ra4 a5 25. Be3 Bb4 26. Bg2 Ra7 27. Rb1 Rd7 28. Bf4 Rd3 29. Bxb8 Rxb8 30. Rxa5 Rdd8 31. Ra2 1/2-1/2

[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 "Tikranian, Alik"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "B26"]
[WhiteElo "2153"]
[BlackElo "1702"]
[PlyCount "67"]
[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 d6 3. g3 g6 4. Bg2 Bg7 5. Nge2 Nc6 6. d3 e6 7. Be3 Nge7 8. Qd2 Rb8 9. Bh6 0-0 10. h4 f6 11. Bxg7 Kxg7 12. h5 g5 13. h6+ Kh8 14. f4 gxf4 15. gxf4 b5 16. d4 b4 17. Nd1 c4 18. d5 exd5 19. exd5 Na5 20. Ne3 Rb5 21. Nd4 Rb6 22. c3 b3 23. a3 Qc7 24. Be4 Nb7 25. Rg1 Rg8 26. 0-0-0 Nc5 27. Bb1 Ba6 28. Rg7 Rxg7 29. hxg7+ Kxg7 30. Rg1+ Kf7 31. Qh2 Nd3+ 32. Bxd3 cxd3 33. Qxh7+ Ke8 34. Rg8+ 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.03"]
[Round "5"]
[White "Mullink, Jochem"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1974"]
[BlackElo "1702"]
[PlyCount "83"]
[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 d6 3. Nge2 e5 4. g3 Nc6 5. Bg2 Nge7 6. 0-0 g6 7. d3 Bg7 8. a3 0-0 9. Rb1 Be6 10. Kh1 Qd7 11. Nd5 Rac8 12. c3 Bh3 13. Nxe7+ Nxe7 14. d4 Bxg2+ 15. Kxg2 Rfd8 16. dxc5 Qc6 17. Qc2 dxc5 18. Bg5 f6 19. Be3 Bf8 20. c4 Nf5 21. Nc3 Nd4 22. Qd3 a6 23. Nd5 Kg7 24. f4 Bd6 25. fxe5 fxe5 26. Qd2 Qe8 27. Bg5 Rd7 28. Nf6 Qe6 29. Bh6+ Kh8 30. Nxd7 Qxd7 31. Qf2 Kg8 32. Qf6 Ne6 33. Rbd1 Nd4 34. Rf2 b5 35. Rdf1 Ne6 36. h4 bxc4 37. Rd1 Nd4 38. h5 gxh5 39. Qg5+ Kh8 40. Qxh5 Qe6 41. Rf7 Kg8 42. Rdf1 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.02"]
[Round "4"]
[White "Van der Werf, Joel"]
[Black "Baselmans, Sam"]
[Result "1-0"]
[ECO "E85"]
[WhiteElo "1702"]
[BlackElo "1945"]
[PlyCount "123"]
[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 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nfd7 7. Nge2 e5 8. Qd2 exd4 9. Nxd4 Ne5 10. Be2 Nbc6 11. 0-0 f5 12. exf5 gxf5 13. Rac1 a6 14. f4 Ng6 15. Nxc6 bxc6 16. Bf3 Bb7 17. g3 Rb8 18. Ba7 Ra8 19. Be3 Qf6 20. Ne2 Rfe8 21. b3 Re7 22. Rfd1 Rae8 23. Bf2 c5 24. Bxb7 Rxe2 25. Qd5+ Kh8 26. Rd2 R8e6 27. Rcc2 Qe7 28. Bc8 Rxd2 29. Rxd2 Rf6 30. Bxf5 Nf8 31. Bg4 Qe8 32. Re2 Qg6 33. Bh5 Qb1+ 34. Kg2 Rf5 35. Qf3 Rf6 36. Qg4 Qa1 37. Re7 Rh6 38. Rxc7 Re6 39. Bf7 Rf6 40. Bh5 Re6 41. Rc8 Qf6 42. Rc7 Re7 43. Rxe7 Qxe7 44. Qe2 Qf6 45. Bf3 Ne6 46. Bd5 Nf8 47. Bb7 a5 48. Be1 Qf7 49. Bd5 Qa7 50. Qe8 a4 51. bxa4 Qd7 52. Qxd7 Nxd7 53. a5 Nb8 54. Bb7 Bb2 55. a6 Nxa6 56. Bxa6 Ba3 57. Kf3 Kg7 58. Ke4 Kf7 59. Kd5 Ke7 60. f5 h6 61. Bd2 h5 62. Bg5+ 1-0

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.05.01"]
[Round "3"]
[White "Hofstra, Tijmen"]
[Black "Van der Werf, Joel"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "927"]
[BlackElo "1702"]
[PlyCount "80"]
[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. d4 cxd4 3. c3 d5 4. exd5 Qxd5 5. cxd4 Nc6 6. Nf3 Bg4 7. Be2 e6 8. Nc3 Bb4 9. 0-0 Qa5 10. Qb3 Bxf3 11. Bxf3 Nxd4 12. Qd1 Nc6 13. Ne4 Rd8 14. Qe2 Nge7 15. Bg5 0-0 16. a3 Bd6 17. Rfd1 Bb8 18. b4 Qe5 19. g3 Rxd1+ 20. Rxd1 Ng6 21. Be3 b6 22. Bg2 Rd8 23. Rxd8+ Nxd8 24. Qd1 Qc7 25. f4 Nc6 26. Nf2 Nce7 27. Nd3 Nf5 28. Bf2 h6 29. Nc1 Nd6 30. Ne2 e5 31. fxe5 Nxe5 32. Bd4 Nf5 33. Nf4 Nxd4 34. Qxd4 Qc1+ 35. Kf2 Ng4+ 36. Ke2 Qc2+ 37. Kf1 Qc1+ 38. Ke2 Qc2+ 39. Kf1 Be5 40. Qe4 Qf2# 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.04.30"]
[Round "2"]
[White "Van der Werf, Joel"]
[Black "Schilstra, Laurens"]
[Result "0-1"]
[ECO "D78"]
[WhiteElo "1702"]
[BlackElo "1978"]
[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. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 c6 6. 0-0 d5 7. b3 a5 8. Nc3 Bf5 9. Bb2 Qb6 10. Ba3 Re8 11. Ne5 dxc4 12. Nxc4 Qd8 13. Bb2 a4 14. bxa4 Be6 15. Ne5 Qb6 16. Rb1 Qa5 17. Ba1 Ra7 18. Qc2 Nfd7 19. Nf3 Na6 20. Ng5 Qxg5 21. d5 cxd5 22. Rb5 Rc8 23. Qb3 Nac5 24. Qd1 d4 25. Ne4 Qe5 26. f4 Qc7 27. Ng5 Bxa2 28. f5 Qe5 29. Kh1 Bd5 30. Nf3 Qe3 31. fxg6 hxg6 32. Nxd4 Bxg2+ 33. Kxg2 Rxa4 34. Nc2 Qe4+ 35. Kg1 Rxa1 36. Nxa1 Bd4+ 37. e3 Bxe3+ 0-1

[Event "NED-ch U18"]
[Site "Rotterdam"]
[Date "2016.04.29"]
[Round "1"]
[White "Vos, Tjark"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "B94"]
[WhiteElo "2130"]
[BlackElo "1702"]
[PlyCount "77"]
[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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 Qb6 8. Bb3 e6 9. Qd2 Be7 10. 0-0-0 0-0 11. g4 Nc5 12. f3 Qc7 13. h4 b5 14. Kb1 Bd7 15. Bxf6 Bxf6 16. g5 Be7 17. h5 b4 18. Nce2 a5 19. g6 a4 20. h6 fxg6 21. hxg7 Rf7 22. Rxh7 Rxg7 23. Rxg7+ Kxg7 24. Bc4 Nxe4 25. Qxb4 Rb8 26. Bb5 Nc5 27. Nf4 Qb7 28. c4 Bf6 29. Qd2 e5 30. Nd5 exd4 31. Nxf6 Bf5+ 32. Ne4 Nxe4 33. fxe4 Qxe4+ 34. Ka1 d3 35. Re1 Qd4 36. Bxa4 Qxc4 37. Bb3 Qc7 38. Qg5 Rb7 39. Re8 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.09"]
[Round "9"]
[White "Van der Werf, Joel"]
[Black "Senders, Justin"]
[Result "0-1"]
[ECO "B03"]
[BlackElo "1986"]
[PlyCount "60"]
[EventDate "2015.05.02"]
[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 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 cxd6 6. Nc3 g6 7. Bd3 Bg7 8. Nge2 Nc6 9. Be3 0-0 10. b3 e5 11. d5 Ne7 12. Qd2 Bf5 13. Bxf5 Nxf5 14. Ng3 Nxe3 15. fxe3 f5 16. 0-0 Nd7 17. Rac1 Bh6 18. Qc2 Bxe3+ 19. Kh1 Bxc1 20. Qxc1 Qh4 21. Nb5 Nf6 22. Ne2 Ng4 23. h3 f4 24. Rf3 Nf2+ 25. Kg1 Ne4 26. Qc2 Ng5 27. Rc3 f3 28. Nc1 Qe1+ 29. Kh2 f2 30. Nd3 Qg1+ 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.08"]
[Round "8"]
[White "Van der Werf, Joel"]
[Black "Zoun, Rogier"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "77"]
[EventDate "2015.05.02"]
[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 Nbd7 4. f4 e5 5. Nf3 exd4 6. Qxd4 c6 7. Be3 d5 8. e5 Ng4 9. Bg1 Bc5 10. Qd2 Bxg1 11. Rxg1 Nb6 12. h3 Nh6 13. g4 Qe7 14. 0-0-0 Bd7 15. Kb1 0-0-0 16. Re1 Rhe8 17. f5 Qf8 18. Rg2 c5 19. Nb5 Bxb5 20. Bxb5 Re7 21. Bf1 Qe8 22. Rge2 Ng8 23. e6 Nc4 24. Qc3 Rc7 25. Ne5 Nxe5 26. Rxe5 f6 27. R5e2 Ne7 28. Bg2 Qb5 29. Qb3 Qa6 30. Rd2 c4 31. Qc3 Qb6 32. Qd4 Qa5 33. c3 Rc6 34. Red1 Ra6 35. a3 Rad6 36. Qe3 Kb8 37. Qf4 Ka8 38. Bf1 b5 39. Qf3 1/2-1/2

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.07"]
[Round "7"]
[White "Tikranian, Alik"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2148"]
[PlyCount "61"]
[EventDate "2015.05.02"]
[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. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. Bg5 h6 7. Bh4 d6 8. 0-0 a6 9. a4 Be6 10. Nbd2 Ne7 11. Bxf6 gxf6 12. Nh4 d5 13. exd5 Nxd5 14. Bxd5 Qxd5 15. Ne4 Be7 16. Qf3 Qd8 17. Rae1 Kh7 18. Nf5 Bxf5 19. Qxf5+ Kh8 20. Qh5 Kh7 21. Re3 Rg8 22. Qxf7+ Rg7 23. Qe6 Qg8 24. Qxe7 Rxe7 25. Nxf6+ Kh8 26. Nxg8 Rxg8 27. Rfe1 Rg5 28. g3 Rd7 29. Rxe5 Rxe5 30. Rxe5 Rxd3 31. Re8+ 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.06"]
[Round "6"]
[White "Schilstra, Laurens"]
[Black "Van der Werf, Joel"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "1967"]
[PlyCount "52"]
[EventDate "2015.05.02"]
[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 0-0 8. 0-0 d5 9. exd5 cxd5 10. h3 c6 11. Qf3 Be6 12. Bg5 Be7 13. Rfe1 Rb8 14. Rab1 Qd7 15. Ne2 Kh8 16. Ng3 Ng8 17. Qh5 g6 18. Qh4 Rb4 19. c4 Bxg5 20. Qxg5 dxc4 21. Qe5+ f6 22. Qxe6 Qxe6 23. Rxe6 cxd3 24. Rd6 Rfb8 25. b3 c5 26. Rxd3 c4 1/2-1/2

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.05"]
[Round "5"]
[White "Van der Werf, Joel"]
[Black "Speksnijder, Bent"]
[Result "1-0"]
[ECO "C88"]
[PlyCount "81"]
[EventDate "2015.05.02"]
[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 b5 6. Bb3 Be7 7. Re1 0-0 8. c3 Na5 9. Nxe5 Nxb3 10. Qxb3 Bb7 11. d3 d5 12. exd5 Bxd5 13. Qd1 Re8 14. d4 c5 15. Be3 cxd4 16. Bxd4 Bd6 17. Nd2 Qc7 18. Nef3 Rxe1+ 19. Qxe1 Re8 20. Qd1 h6 21. a4 Ng4 22. h3 Ne5 23. axb5 axb5 24. Nxe5 Bxe5 25. Bxe5 Qxe5 26. Nf3 Qe4 27. Qd4 Qe6 28. Re1 Qxe1+ 29. Nxe1 Rxe1+ 30. Kh2 Bc4 31. b3 Bxb3 32. Qd8+ Kh7 33. Qd3+ g6 34. Qxb5 Be6 35. c4 Rc1 36. c5 Rc2 37. Kg3 Bd5 38. c6 Bxc6 39. Qb3 Re2 40. Qxf7+ Kh8 41. Qf6+ 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.04"]
[Round "4"]
[White "Geene, Joris"]
[Black "Van der Werf, Joel"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1840"]
[PlyCount "79"]
[EventDate "2015.05.02"]
[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. d4 exd4 3. c3 dxc3 4. Nxc3 d6 5. Nf3 Nf6 6. Bc4 Be7 7. 0-0 0-0 8. Qe2 Nbd7 9. Rd1 Nb6 10. Bb3 Bd7 11. Bf4 Qe8 12. Rac1 Bc6 13. Nd4 Nbd7 14. Ncb5 Qb8 15. Rxc6 bxc6 16. Nxc6 Qb7 17. Nxe7+ Kh8 18. Nd5 Rae8 19. f3 Nxd5 20. Bxd5 Qb6+ 21. Be3 Qb8 22. Bxa7 Qd8 23. Qc2 Qg5 24. Bc6 Rd8 25. Bd4 Ne5 26. Bxe5 dxe5 27. Bd5 f5 28. Nxc7 Rd7 29. Ne6 Qe3+ 30. Qf2 Qxf2+ 31. Kxf2 Rb8 32. Rd2 fxe4 33. fxe4 Rb6 34. Rc2 Rb8 35. b4 h6 36. b5 Rf7+ 37. Kg3 Ra7 38. b6 Ra6 39. b7 Rxe6 40. Bxe6 1-0

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.03"]
[Round "2"]
[White "Bakker, Jouke"]
[Black "Van der Werf, Joel"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "1919"]
[PlyCount "131"]
[EventDate "2015.05.02"]
[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 0-0 8. 0-0 h6 9. Bd2 Rb8 10. Qf3 d6 11. Rfe1 Bc5 12. a3 Ng4 13. Re2 Ne5 14. Qg3 Qf6 15. Na4 Nxd3 16. cxd3 Bd4 17. Bc3 Bd7 18. Bxd4 Qxd4 19. Nc3 Rb3 20. Rd2 Rfb8 21. Nd1 c5 22. Rc1 Be6 23. Qe3 Qf6 24. e5 Qg6 25. Rc3 Rxc3 26. Nxc3 Re8 27. Nb5 Bd7 28. Nc3 Rxe5 29. Ne4 c4 30. Qxa7 cxd3 31. f3 Bc6 32. Ng3 Qg5 33. Qf2 Qe7 34. h3 Re1+ 35. Kh2 Bb5 36. Ne4 Re2 37. Qd4 Rxd2 38. Nxd2 Qe2 39. Qc3 c6 40. b3 Qe5+ 41. Qxe5 dxe5 42. Kg3 f5 43. Kf2 Kf7 44. Ke3 Ke6 45. Nb1 Kd6 46. Nc3 f4+ 47. Kd2 Ba6 48. Ne4+ Kd5 49. Kc3 c5 50. Nf2 d2 51. Kxd2 Bf1 52. a4 Ba6 53. Ne4 Bf1 54. a5 Kc6 55. a6 Bxa6 56. g4 fxg3 57. Nxg3 Bc8 58. h4 g5 59. hxg5 hxg5 60. Ne4 g4 61. fxg4 Bxg4 62. Kc3 Bf3 63. Nd2 Bd5 64. b4 cxb4+ 65. Kxb4 e4 66. Nxe4 1/2-1/2

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.03"]
[Round "3"]
[White "Van der Werf, Joel"]
[Black "Kalle, Erwin"]
[Result "0-1"]
[ECO "C63"]
[BlackElo "1744"]
[PlyCount "74"]
[EventDate "2015.05.02"]
[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 f5 4. d3 d6 5. Nc3 Nf6 6. Bg5 Be7 7. Bxf6 Bxf6 8. Nd5 0-0 9. c3 Nb8 10. Bc4 Kh8 11. Qe2 c6 12. Nxf6 Qxf6 13. h3 a5 14. 0-0-0 Nd7 15. Rdf1 Nc5 16. Nd2 b5 17. Bb3 fxe4 18. Nxe4 Qf4+ 19. Kb1 Nxe4 20. dxe4 a4 21. Bc2 Be6 22. f3 Rad8 23. Rd1 Rd7 24. Qf2 Qf7 25. a3 c5 26. Rd2 Rb8 27. Rhd1 Rb6 28. Ka1 Qf8 29. h4 Rdb7 30. g4 b4 31. cxb4 cxb4 32. axb4 Rxb4 33. Bb1 a3 34. bxa3 Qa8 35. Ba2 Qxa3 36. Rc2 Bxa2 37. Rxa2 Qc3+ 0-1

[Event "NED-ch U21"]
[Site "Rotterdam"]
[Date "2015.05.02"]
[Round "1"]
[White "Van der Werf, Joel"]
[Black "Vos, Tjark"]
[Result "0-1"]
[ECO "B22"]
[BlackElo "2110"]
[PlyCount "96"]
[EventDate "2015.05.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. c3 d5 4. exd5 exd5 5. d4 Nc6 6. Bb5 a6 7. Bxc6+ bxc6 8. 0-0 Bd6 9. Be3 c4 10. Re1 Ne7 11. Nbd2 0-0 12. Nf1 Ng6 13. b3 cxb3 14. axb3 h6 15. h3 Bf5 16. Ng3 Be6 17. Qc2 Qd7 18. Qd2 Kh7 19. Nh5 Bxh3 20. Bxh6 Qg4 21. Qg5 Qxg2+ 22. Qxg2 Bxg2 23. Bxg7 Bxf3 24. Bxf8 Bxf8 25. Nf6+ Kh8 26. Re3 Nh4 27. Kh2 Bh6 28. Re8+ Rxe8 29. Nxe8 Be2 30. Kh3 Nf3 31. Kg3 Kh7 32. Ra2 Nd2 33. Nc7 Ne4+ 34. Kg2 Bd3 35. c4 dxc4 36. bxc4 Bxc4 37. Rc2 Nd6 38. Kg1 Bf8 39. Ne8 Bb5 40. Nc7 a5 41. d5 cxd5 42. Nxd5 a4 43. f4 a3 44. Rg2 Bg7 45. Nb4 Bc4 46. Kh2 Bc3 47. Na2 Bxa2 48. Rxa2 Bb2 0-1

