[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.07"]
[Round "7"]
[White "Verheul, Job"]
[Black "Sonneveld, David"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "1655"]
[BlackElo "1589"]
[PlyCount "54"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Qxd7 7. Nc3 e5 8. Qd3 Qc6 9. 0-0 Be6 10. b3 Rc8 11. Bb2 h6 12. Rfd1 Nf6 13. Rac1 Be7 14. Nd2 0-0 15. Nf1 Nd7 16. Nd5 Bg5 17. Nde3 Be7 18. Nd5 Bxd5 19. exd5 Qc7 20. c4 f5 21. b4 e4 22. Qb3 Bf6 23. Bxf6 Rxf6 24. c5 Ne5 25. cxd6 Qxc1 26. Rxc1 Rxc1 27. Qb2 Nf3+ 0-1

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.06"]
[Round "6"]
[White "Van Dam, Thijs"]
[Black "Sonneveld, David"]
[Result "1-0"]
[ECO "D37"]
[BlackElo "1589"]
[PlyCount "61"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bf4 e6 5. e3 Nbd7 6. Nf3 a6 7. cxd5 exd5 8. Bd3 Be7 9. h3 0-0 10. 0-0 Ne8 11. Rb1 Bd6 12. Qc2 Bxf4 13. Bxh7+ Kh8 14. exf4 g6 15. Bxg6 fxg6 16. Qxg6 Qf6 17. Qh5+ Kg7 18. Rfe1 Rh8 19. Qg4+ Kf8 20. Re6 Qd8 21. Qg6 Rg8 22. Qh6+ Rg7 23. Ng5 Ndf6 24. Rbe1 Kg8 25. R1e5 Bxe6 26. Nxe6 Qd7 27. Nxg7 Qxg7 28. Rg5 Kf7 29. Rxg7+ Nxg7 30. f5 Nxf5 31. Qf4 1-0

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.05"]
[Round "5"]
[White "Sonneveld, David"]
[Black "Torensma, Christian"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1589"]
[BlackElo "1641"]
[PlyCount "43"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nc6 5. c3 Bd6 6. Bd3 Nge7 7. h3 Bf5 8. 0-0 Qd7 9. Re1 f6 10. Na3 0-0 11. Nb5 Rae8 12. Nxd6 Qxd6 13. Bxf5 Nxf5 14. Rxe8 Rxe8 15. Qd3 Qe6 16. Bf4 Nd6 17. Re1 Qd7 18. Rxe8+ Nxe8 19. Qb5 b6 20. Qe2 Kf7 21. Nd2 g6 22. Qd3 1/2-1/2

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.04"]
[Round "4"]
[White "Sonneveld, David"]
[Black "Li Behn, Tobias"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "1589"]
[BlackElo "1443"]
[PlyCount "60"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. Bxf6 exf6 5. e3 Be6 6. Bd3 Nc6 7. Nge2 Qd7 8. a3 a6 9. 0-0 Bd6 10. b4 0-0 11. Qd2 Ne7 12. f3 b6 13. e4 fxe4 14. fxe4 c5 15. exd5 Nxd5 16. Nxd5 Bxd5 17. dxc5 bxc5 18. Rad1 Rfd8 19. Nf4 Bf7 20. Rf3 Qc7 21. Qc1 cxb4 22. axb4 Bxb4 23. Rh3 h6 24. Ng6 Qc5+ 25. Kh1 Rxd3 26. Rdxd3 Bxg6 27. Rdg3 Qxc2 28. Qxc2 Bxc2 29. Rxh6 Kf7 30. Rh5 Rd8 0-1

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.03"]
[Round "3"]
[White "Verweij, David"]
[Black "Sonneveld, David"]
[Result "0-1"]
[ECO "B25"]
[BlackElo "1589"]
[PlyCount "74"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. d3 d6 3. g3 Nc6 4. Bg2 g6 5. f4 Bg7 6. Nf3 e6 7. Nc3 Nge7 8. 0-0 b6 9. Bd2 Ba6 10. Nh4 Nd4 11. f5 Nec6 12. Qc1 Nb4 13. Bh6 Be5 14. fxe6 fxe6 15. Bh3 Nbxc2 16. Bxe6 Nxe6 17. Qxc2 Qd7 18. Nd5 0-0-0 19. Nf3 Bb7 20. Ne3 Rhg8 21. Rad1 Nd4 22. Nxd4 Bxd4 23. Kg2 d5 24. Rf3 dxe4 25. dxe4 Qe6 26. Nd5 Bxd5 27. Rxd4 Bc6 28. Rc4 g5 29. b4 Qxh6 30. bxc5 g4 31. Rf4 b5 32. Rb4 Rgf8 33. a4 Rxf4 34. gxf4 Qxf4 35. Kg1 Qe3+ 36. Kf1 Qf3+ 37. Ke1 Qh1+ 0-1

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.02"]
[Round "2"]
[White "Arnold, Kiri"]
[Black "Sonneveld, David"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "1827"]
[BlackElo "1589"]
[PlyCount "67"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. Nf3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. h3 e5 7. Nde2 h5 8. g3 Be6 9. Bg2 Be7 10. a4 Nc6 11. 0-0 Nb4 12. Nd5 Nfxd5 13. exd5 Bf5 14. c4 Rc8 15. b3 Bg5 16. f4 Bf6 17. Bd2 exf4 18. Rxf4 Bxa1 19. Qxa1 Bg6 20. Bxb4 0-0 21. Qd4 Re8 22. Bc3 f6 23. Be4 Rxe4 24. Rxe4 Bxe4 25. Qxe4 Qb6+ 26. Kg2 Kf8 27. Qh7 Re8 28. Nd4 Qc7 29. Ne6+ Rxe6 30. dxe6 Qc6+ 31. Kf2 Qc5+ 32. Ke2 Qg5 33. Qh8+ Ke7 34. Qc8 1-0

[Event "NED-ch U18"]
[Site "Almelo"]
[Date "2021.08.01"]
[Round "1"]
[White "Sonneveld, David"]
[Black "Maters, Arthur"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "1589"]
[BlackElo "2032"]
[PlyCount "128"]
[EventDate "2021.08.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. 0-0 Ngf6 6. Re1 e6 7. c3 Be7 8. d4 0-0 9. Bf4 Nh5 10. Be3 Qc7 11. Nbd2 Rac8 12. Rc1 Rfd8 13. Ng5 Nhf6 14. f4 h6 15. Nh3 Qa5 16. e5 Nd5 17. Ne4 Nxe3 18. Rxe3 dxe5 19. dxe5 Nxe5 20. Qh5 Ng6 21. a3 Rd5 22. Qe2 c4 23. Rf3 b5 24. Rff1 Rcd8 25. Rfd1 Qc7 26. g3 Bc5+ 27. Nhf2 Bxf2+ 28. Nxf2 Ne7 29. Ng4 Qd6 30. Ne3 Rd2 31. Rxd2 Qxd2 32. Qxd2 Rxd2 33. Rc2 Rxc2 34. Nxc2 Nc6 35. Kf2 Kf8 36. a4 a6 37. axb5 axb5 38. Na3 Na7 39. Ke3 Ke7 40. Kd4 Kd6 41. Ke4 Kc5 42. Nc2 Nc6 43. g4 b4 44. h4 b3 45. Ne3 f6 46. h5 Ne7 47. Kf3 Nd5 48. Nf1 e5 49. fxe5 fxe5 50. Ke4 Nf4 51. Kxe5 Nd3+ 52. Ke6 Nxb2 53. Nd2 Nd1 54. Nb1 b2 55. Kf7 Nxc3 56. Nxc3 Kb4 57. Nb1 c3 58. Nxc3 Kxc3 59. Kxg7 b1Q 60. Kxh6 Qb6+ 61. Kg5 Qc5+ 62. Kh4 Qf8 63. Kg5 Qg7+ 64. Kh4 Qf6+ 0-1

