[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.02.21"]
[Round "5"]
[White "Wittert, Arnout"]
[Black "Bingen, Stanley"]
[Result "1-0"]
[ECO "B07"]
[BlackElo "1168"]
[PlyCount "79"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d6 2. e4 c6 3. Nc3 Nf6 4. Bd3 e5 5. dxe5 dxe5 6. Nf3 Bd6 7. Bg5 Nbd7 8. 0-0 0-0 9. a3 Qb6 10. b4 Ng4 11. Be2 Qc7 12. Nh4 f6 13. Bc1 Nh6 14. Bxh6 gxh6 15. Nf5 Nb6 16. Qxd6 Qxd6 17. Nxd6 Kh8 18. Rad1 Be6 19. Nxb7 Rg8 20. h3 Bxh3 21. Bf3 Rg5 22. Rd8+ Rxd8 23. Nxd8 Nc4 24. Nf7+ Kg7 25. Nxg5 Bc8 26. Nh3 Nd2 27. Rd1 Nxf3+ 28. gxf3 Bxh3 29. Rd6 h5 30. Rxc6 Kg6 31. Nd5 Kg5 32. Rxf6 h4 33. c4 Bc8 34. Rf8 Be6 35. c5 h3 36. c6 Kg6 37. c7 Kg7 38. Re8 Kf7 39. Rxe6 Kxe6 40. c8Q+ 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.01.24"]
[Round "4"]
[White "Oosterom, Cor"]
[Black "Wittert, Arnout"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "1244"]
[PlyCount "71"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 Nc6 3. g3 Bf5 4. Bg2 Nf6 5. 0-0 e6 6. d3 Ng4 7. c3 Qf6 8. Qa4 Bd6 9. Na3 0-0 10. h3 Nh6 11. e4 dxe4 12. dxe4 Bxh3 13. Bxh3 Qg6 14. Kg2 Rae8 15. Be3 a6 16. Nc2 b5 17. Qxa6 Qxe4 18. Rf2 Ne7 19. Re2 Nef5 20. Rae1 Nxe3+ 21. Nxe3 c6 22. Nf5 Qd5 23. Rd2 Qc5 24. Nxd6 Ra8 25. Qb7 Ra7 26. Ne4 Rxb7 27. Nxc5 Ra7 28. a3 Re8 29. f5 Rae7 30. fxe6 f6 31. Rd7 Kf8 32. Rxe7 Rxe7 33. Nd4 Kg8 34. Nxc6 Re8 35. e7 Nf7 36. Be6 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.11.08"]
[Round "1"]
[White "Wittert, Arnout"]
[Black "Van der Marel, Lambertus"]
[Result "0-1"]
[ECO "C50"]
[BlackElo "2086"]
[PlyCount "42"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 d6 6. h3 Na5 7. Nbd2 Nxc4 8. Nxc4 Be6 9. Ne3 0-0 10. c4 c6 11. a3 a5 12. Rb1 a4 13. Ng5 Bc8 14. Qf3 h6 15. Nf5 Bxf5 16. Qxf5 hxg5 17. Bxg5 Qd7 18. Qf3 Nh7 19. Bd2 f5 20. Rbe1 f4 21. g3 Qxh3 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.06.21"]
[Round "9"]
[White "Sannen, Stijn"]
[Black "Wittert, Arnout"]
[Result "1/2-1/2"]
[ECO "D06"]
[WhiteElo "1211"]
[PlyCount "59"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 e6 6. a3 Be7 7. Nf3 h6 8. Be2 0-0 9. 0-0 b6 10. Bf4 Bb7 11. Qd3 c5 12. dxc5 Bxc5 13. Rfd1 Nbd7 14. Nd4 e5 15. Be3 exd4 16. Bxd4 Qe7 17. Be3 Nxe4 18. Nxe4 Rad8 19. Nxc5 Nxc5 20. Qc2 Rc8 21. b4 Ne4 22. Qb2 Rc3 23. Bd4 Rfc8 24. Bxc3 Nxc3 25. Bg4 Qg5 26. Bh3 Nxd1 27. Rxd1 Rd8 28. Rxd8+ Qxd8 29. Qe2 Qg5 30. Qc2 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.05.24"]
[Round "8"]
[White "Turenhout, Ryanne"]
[Black "Wittert, Arnout"]
[Result "1-0"]
[ECO "C70"]
[WhiteElo "1435"]
[PlyCount "89"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. c3 a6 5. Ba4 b5 6. Bc2 d6 7. h3 Ng6 8. d4 Be7 9. Be3 0-0 10. Nbd2 Bh4 11. Nxh4 Nxh4 12. Nf3 Nxg2+ 13. Kd2 Nxe3 14. fxe3 Na5 15. b3 d5 16. Nxe5 Qh4 17. Qe1 Qh6 18. Ng4 Bxg4 19. hxg4 Qg5 20. exd5 g6 21. Qg3 Rae8 22. Rae1 Qxd5 23. Qxc7 Nc6 24. Qh2 h5 25. gxh5 Ne5 26. Bd1 g5 27. Qg3 f6 28. h6 a5 29. Rhf1 a4 30. h7+ Kh8 31. Bf3 Qd6 32. Kc2 axb3+ 33. axb3 Rd8 34. Rd1 Qa3 35. Ra1 Qe7 36. dxe5 fxe5 37. Qg2 b4 38. c4 Qc5 39. Qe2 Rf7 40. Bd5 Rg7 41. Qe1 Rxd5 42. Ra8+ Kxh7 43. Kb2 Rd3 44. Qe2 Rxe3 45. Qh5# 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.03.22"]
[Round "6"]
[White "Wittert, Arnout"]
[Black "Oosterom, Cor"]
[Result "1-0"]
[ECO "B13"]
[BlackElo "1290"]
[PlyCount "93"]
[EventDate "2018.10.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. exd5 cxd5 4. d4 e6 5. Bd3 Nc6 6. Nf3 Nf6 7. 0-0 Be7 8. h3 0-0 9. Bf4 a6 10. Qd2 b5 11. a3 Qb6 12. Ne2 Bb7 13. c3 Rfd8 14. Rae1 Rac8 15. Ng3 Na5 16. Ne5 Nc4 17. Qc2 Nd6 18. Bg5 h6 19. Bxf6 Bxf6 20. f4 Bh4 21. Re3 Nc4 22. Bh7+ Kf8 23. Ref3 Nd6 24. f5 Bxg3 25. Ng6+ Ke8 26. fxe6 f6 27. Rxg3 Ne4 28. Bg8 Rc7 29. Re3 Bc8 30. Bf7+ Rxf7 31. exf7+ Kxf7 32. Ne5+ Ke6 33. Ng6 Kf7 34. Nh4 Qc7 35. Rff3 a5 36. g4 b4 37. a4 b3 38. Qd3 Qd6 39. Nf5 Qc6 40. h4 Ba6 41. Qb1 Rd7 42. g5 Nd2 43. Qd1 Nxf3+ 44. Qxf3 hxg5 45. Qh5+ g6 46. Qh7+ Kf8 47. Qh8+ 1-0

