[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.29"]
[Round "6"]
[White "Van der Knaap, Jan"]
[Black "Arnold, Lorin"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1829"]
[BlackElo "1709"]
[PlyCount "114"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 e6 4. Bg2 Nge7 5. Nge2 d5 6. exd5 Nxd5 7. Nxd5 exd5 8. d4 Be6 9. 0-0 cxd4 10. Nxd4 Qf6 11. Be3 Be7 12. Nxc6 bxc6 13. c4 0-0 14. cxd5 Bxd5 15. Bxd5 cxd5 16. Qd4 Qd6 17. Bf4 Qc5 18. Rfd1 Qxd4 19. Rxd4 Rfd8 20. Rad1 Bf6 21. Rxd5 Rxd5 22. Rxd5 Bxb2 23. Rd7 a6 24. Be3 Ba3 25. h4 h5 26. Kf1 Rc8 27. Ra7 Rc6 28. Ke2 Rc2+ 29. Kd3 Rxa2 30. Rxa6 Ra1 31. Kc2 Bb2 32. Rxa1 Bxa1 33. Kd3 f5 34. Kc4 Kf7 35. Kd5 Bc3 36. Bg5 Be1 37. Be3 g6 38. Ke5 Ba5 39. Kf4 Bc3 40. Kf3 Ke6 41. Bf4 Be1 42. Be3 Bb4 43. Kf4 Be7 44. Kf3 Ke5 45. Bf4+ Kd5 46. Be3 Ke5 47. Bf4+ Kd4 48. Be3+ Kd3 49. Bh6 Bf6 50. Bf4 Kc2 51. Ke2 Kc3 52. Kf3 Kd3 53. Bh6 Bd8 54. Bf4 Ba5 55. Bg5 Be1 56. Bh6 Kc2 57. Ke2 Bc3 1/2-1/2

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.28"]
[Round "4"]
[White "Van der Knaap, Jan"]
[Black "Smid, Jelle"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "1829"]
[PlyCount "81"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. a3 f6 7. Bd3 fxe5 8. Nxe5 Nxe5 9. dxe5 g6 10. 0-0 Qc7 11. Bf4 Bg7 12. Re1 Ne7 13. c4 0-0 14. Bg3 dxc4 15. Bxc4 b5 16. Bb3 Nf5 17. Qg4 Nd4 18. Bd1 Bc6 19. Nc3 Rad8 20. Ne4 Bxe4 21. Qxe4 Nf5 22. Bf3 Nxg3 23. hxg3 Rf5 24. Qc6 Qxc6 25. Bxc6 Rxe5 26. Bxb5 Rxe1+ 27. Rxe1 Bxb2 28. Rxe6 Rd4 29. a4 c4 30. Re2 c3 31. f3 Rd2 32. Rxd2 cxd2 33. Be2 a5 34. Bd1 Kf7 35. Kf1 Ke6 36. Ke2 Bc3 37. Kd3 Bb4 38. Ke4 Kf6 39. f4 g5 40. f5 Bd6 41. g4 1/2-1/2

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.28"]
[Round "5"]
[White "Wandy, Kasim"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1782"]
[BlackElo "1829"]
[PlyCount "79"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 g6 3. Be2 Nf6 4. c3 e5 5. 0-0 Nc6 6. d4 Bg4 7. Be3 Bxf3 8. Bxf3 Bg7 9. d5 Ne7 10. c4 0-0 11. Nc3 c6 12. a3 cxd5 13. cxd5 Qd7 14. Qd2 Ng4 15. Bxg4 Qxg4 16. h3 Qd7 17. Bh6 Bxh6 18. Qxh6 Kh8 19. f4 Ng8 20. Qh4 f5 21. fxe5 dxe5 22. exf5 gxf5 23. Rae1 Ne7 24. Qg5 Ng6 25. h4 Rae8 26. g3 Nf4 27. Kh2 Nd3 28. Re2 e4 29. Qh6 Rf7 30. h5 Ne5 31. Qf4 Ng4+ 32. Kh3 Ref8 33. Rfe1 Rg8 34. Rf1 Rf6 35. Kg2 Qf7 36. Rh1 Qe7 37. Nd1 Qc5 38. Nc3 a6 39. Rc1 Qe7 40. Rd1 1/2-1/2

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.27"]
[Round "1"]
[White "Smit, Ron"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1765"]
[BlackElo "1829"]
[PlyCount "66"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 g6 3. c4 Bg7 4. Nc3 Bg4 5. e3 c5 6. Be2 cxd4 7. Nxd4 Bxe2 8. Ncxe2 Nf6 9. 0-0 0-0 10. b3 Nc6 11. Bb2 a6 12. h3 Qc7 13. Nxc6 Qxc6 14. Bxf6 Bxf6 15. Rb1 b5 16. Qd5 Rfc8 17. Rfc1 b4 18. Qxc6 Rxc6 19. e4 a5 20. Rd1 a4 21. g3 axb3 22. axb3 Ra2 23. Nf4 e6 24. Kf1 Rca6 25. Nd3 Bc3 26. Nc1 Rc2 27. Kg1 Kf8 28. Kf1 Ke7 29. Rd3 Ra3 30. Ne2 Raa2 31. Re3 Bf6 32. Rf3 Rxe2 33. Re3 Red2 0-1

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.27"]
[Round "3"]
[White "Timmerman, Jan Willem"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1900"]
[BlackElo "1829"]
[PlyCount "106"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 g6 3. f4 Bg7 4. Nf3 c5 5. Bb5+ Bd7 6. Bxd7+ Qxd7 7. 0-0 Nc6 8. d3 e6 9. Qe1 Nge7 10. Be3 Nd4 11. Qf2 Nec6 12. Rae1 Nxf3+ 13. Qxf3 Nd4 14. Qf2 0-0 15. Kh1 b5 16. Nd1 f5 17. c3 Nc6 18. e5 dxe5 19. Bxc5 Rfe8 20. Qe2 Qd5 21. Bg1 exf4 22. c4 bxc4 23. dxc4 Qa5 24. Rxf4 e5 25. Rf3 e4 26. Ra3 Qe5 27. Nc3 a5 28. Rb3 Rab8 29. Nb5 Red8 30. Rc3 Nb4 31. a3 Nd3 32. Rd1 f4 33. Rc2 a4 34. Rdd2 Qf5 35. Nc3 e3 36. Rd1 Nxb2 37. Nd5 Qe4 38. Rb1 Nd3 39. Rxb8 Rxb8 40. Nb4 Nxb4 41. axb4 Rxb4 42. c5 Be5 43. c6 Bc7 44. Qd1 Rd4 45. Qe2 a3 46. Ra2 Rd3 47. Qf3 Qxf3 48. gxf3 Rd2 49. Ra1 a2 50. h3 Be5 51. Rc1 a1Q 52. Rxa1 Bxa1 53. c7 Rc2 0-1

[Event "Utrecht Keres Memorial"]
[Site "Utrecht"]
[Date "2022.05.27"]
[Round "2"]
[White "Van der Knaap, Jan"]
[Black "Faverey, Eddy"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1829"]
[BlackElo "1724"]
[PlyCount "104"]
[EventDate "2022.05.27"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Bd2 Bf5 6. Qf3 c6 7. Nb5 Qd8 8. Qxf5 e6 9. Qf3 cxb5 10. Qxb7 Nbd7 11. Bxb5 Rb8 12. Qa6 Qc7 13. Nf3 Be7 14. 0-0 0-0 15. c4 Rb7 16. Bf4 Qc8 17. Rab1 Nb8 18. Qa5 Bd8 19. Qc3 Be7 20. Ba4 Rb4 21. Bb3 Qb7 22. Bc2 Rc8 23. b3 a5 24. Qd3 g6 25. Bd2 Rb6 26. Bxa5 Rd6 27. Bc3 Nc6 28. a3 e5 29. d5 e4 30. dxc6 Rcxc6 31. Qe2 exf3 32. Qxf3 Qc8 33. Rfe1 Qd8 34. Bb4 Re6 35. Rxe6 Rxe6 36. Rd1 Qc7 37. Bc3 Qc5 38. Bb2 h5 39. h3 Qg5 40. Qa8+ Kh7 41. Bc1 Qe5 42. Qf3 Kg7 43. b4 Bd6 44. g3 Nh7 45. Bf4 Qf6 46. Kg2 Be7 47. h4 Qb2 48. Qd3 Qf6 49. Be3 Rd6 50. Bd4 Kf8 51. Bxf6 Rxd3 52. Bxe7+ Ke8 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.06.21"]
[Round "9"]
[White "Van Drunick, Jan Willem"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1943"]
[BlackElo "1769"]
[PlyCount "54"]
[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 d6 2. c4 e5 3. d5 f5 4. e4 fxe4 5. Nc3 Nf6 6. Nge2 Bf5 7. Ng3 Bg6 8. Bg5 Be7 9. Bxf6 gxf6 10. Be2 f5 11. 0-0 0-0 12. b4 Nd7 13. a3 Bg5 14. Qc2 Nf6 15. c5 h5 16. Rad1 h4 17. Nh1 Kh8 18. h3 Rg8 19. g3 f4 20. g4 f3 21. Bc4 Qc8 22. Kh2 Bf4+ 23. Ng3 Nxg4+ 24. hxg4 Qxg4 25. Rg1 Rg7 26. Bf1 hxg3+ 27. Rxg3 Rh7+ 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.05.24"]
[Round "8"]
[White "Van der Knaap, Jan"]
[Black "Hettfleisch, Maurice"]
[Result "1/2-1/2"]
[ECO "B85"]
[WhiteElo "1769"]
[BlackElo "1751"]
[PlyCount "92"]
[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 c5 2. Nc3 Nc6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Be2 e6 7. 0-0 Be7 8. Be3 0-0 9. Kh1 a6 10. a4 Bd7 11. f4 Qc7 12. Nb3 b6 13. Bf3 Rac8 14. Qe1 Rfd8 15. Qf2 Rb8 16. g4 Ne8 17. g5 Nb4 18. Bg2 f5 19. gxf6 Nxf6 20. Nd4 Nc6 21. Qg3 Nxd4 22. Bxd4 Nh5 23. Qf3 g6 24. Qe2 Rf8 25. f5 Bc6 26. fxg6 hxg6 27. Qg4 Kh7 28. Qxe6 Nf4 29. Qg4 Bd7 30. Qg3 Qc4 31. Be3 Nxg2 32. Qxg2 Rxf1+ 33. Rxf1 Rf8 34. Rxf8 Bxf8 35. Nd5 Qxa4 36. Nf6+ Kg7 37. Nxd7 Qxd7 38. Bd4+ Kh7 39. Bxb6 Bg7 40. c3 Qe6 41. Bd4 d5 42. Bxg7 Kxg7 43. exd5 Qe1+ 44. Qg1 Qe4+ 45. Qg2 Qe1+ 46. Qg1 Qe4+ 1/2-1/2

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.04.26"]
[Round "7"]
[White "Uittenbogaard, Rob"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1556"]
[BlackElo "1769"]
[PlyCount "62"]
[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 d6 2. c4 e5 3. Nf3 e4 4. Ng5 f5 5. Qb3 Nf6 6. Nc3 h6 7. Nh3 g5 8. e3 Bg7 9. Bd2 c6 10. 0-0-0 d5 11. cxd5 cxd5 12. Bb5+ Nc6 13. Kb1 0-0 14. g3 f4 15. Nxf4 gxf4 16. gxf4 Bg4 17. Rdf1 Kh7 18. Be2 Na5 19. Qd1 Bxe2 20. Qxe2 Nc4 21. Bc1 Qd7 22. h3 b5 23. Rfg1 b4 24. Nd1 Rab8 25. Rg3 Qb5 26. Qf1 Rfc8 27. f5 Qa4 28. Rxg7+ Kxg7 29. Qg2+ Kh8 30. Qg6 Na3+ 31. Ka1 Rxc1# 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.03.22"]
[Round "6"]
[White "Van der Knaap, Jan"]
[Black "Tabak, Stefan"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1769"]
[BlackElo "2179"]
[PlyCount "98"]
[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 d6 2. d4 g6 3. Nc3 c6 4. f4 Bg7 5. Nf3 Qc7 6. Be2 Nd7 7. a4 e5 8. Be3 Ngf6 9. 0-0 Ng4 10. Bc1 exd4 11. Nxd4 Qb6 12. Bxg4 Qxd4+ 13. Kh1 0-0 14. Qf3 Nf6 15. Bxc8 Raxc8 16. a5 Qc4 17. Ra4 Qa6 18. Rd1 Rcd8 19. Rad4 Qxa5 20. Rxd6 Rxd6 21. Rxd6 Rd8 22. Rxd8+ Qxd8 23. e5 Ne8 24. Qe4 Nc7 25. h3 Ne6 26. Be3 a6 27. Qf3 Qa5 28. Kh2 Qb4 29. Nd1 Qc4 30. Qf2 b5 31. b3 Qd5 32. Nc3 Qd8 33. Ne4 a5 34. Nc5 Qd5 35. Nxe6 fxe6 36. Bc5 g5 37. Bd6 Qe4 38. g3 gxf4 39. gxf4 Bh6 40. Kg3 a4 41. bxa4 bxa4 42. Bc5 Kf7 43. Bd6 Kg6 44. Kg4 Bg7 45. h4 h5+ 46. Kh3 Kf5 47. Qg3 Qh1+ 48. Qh2 Qxh2+ 49. Kxh2 Kxf4 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.02.15"]
[Round "5"]
[White "Van Ketel, Raoul"]
[Black "Van der Knaap, Jan"]
[Result "1-0"]
[ECO "A21"]
[WhiteElo "2231"]
[BlackElo "1769"]
[PlyCount "103"]
[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 d6 2. c4 e5 3. Nc3 exd4 4. Qxd4 Nc6 5. Qd2 g6 6. b3 Bg7 7. Bb2 Nf6 8. g3 0-0 9. Nh3 Re8 10. Nf4 Bf5 11. Bg2 Ne4 12. Nxe4 Bxe4 13. Bxe4 Rxe4 14. Bxg7 Kxg7 15. Qb2+ f6 16. 0-0 Qe8 17. f3 Re5 18. e4 Qf7 19. Rac1 a5 20. Rf2 Nb4 21. a3 Nc6 22. Rd2 Kg8 23. Nd5 Rf8 24. g4 Ree8 25. Qc3 Qg7 26. Rg2 Rf7 27. Rf1 Re5 28. Qd3 Kh8 29. b4 axb4 30. axb4 Re8 31. f4 Rd7 32. h4 Ne7 33. Ne3 Rdd8 34. Nc2 Ng8 35. Rd1 Qe7 36. Re2 f5 37. Qc3+ Qf6 38. e5 dxe5 39. Rxd8 Rxd8 40. g5 Rd1+ 41. Kf2 Qg7 42. Rxe5 h6 43. Ne3 Rd7 44. Nd5 Kh7 45. Qe3 Qf7 46. Qc5 c6 47. Ne3 Rd2+ 48. Kf3 Qd7 49. Qf8 Rd3 50. gxh6 b6 51. h5 gxh5 52. Re8 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2019.01.11"]
[Round "4"]
[White "Van der Knaap, Jan"]
[Black "Agaian, Jura"]
[Result "1-0"]
[ECO "B54"]
[WhiteElo "1769"]
[BlackElo "1755"]
[PlyCount "75"]
[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 c5 2. Nc3 Nc6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e6 7. 0-0 Be7 8. Be3 Bf6 9. a4 Nge7 10. Qd2 Qc7 11. Nb3 Ng6 12. a5 0-0 13. Bb6 Qd7 14. Rad1 Be7 15. f4 Qe8 16. Bc7 Nb4 17. Bxd6 Bxd6 18. Qxd6 Nxc2 19. Rd2 Ne3 20. Rc1 e5 21. f5 Nf4 22. Bf1 f6 23. g3 Nxf1 24. Kxf1 Nh3 25. Nd5 Qb5+ 26. Kg2 Ng5 27. Ne7+ Kh8 28. Ng6+ hxg6 29. Qxf8+ Kh7 30. Rc7 Bd7 31. Qxa8 Qb4 32. Re2 Qxb3 33. Rc3 Bc6 34. Rxb3 gxf5 35. h4 Ne6 36. Qc8 Nd4 37. Ree3 fxe4 38. Rxb7 1-0

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.12.07"]
[Round "3"]
[White "Schenkelaars, Robin"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1559"]
[BlackElo "1769"]
[PlyCount "46"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. f3 c6 5. Be3 b5 6. Qd2 Nbd7 7. d5 cxd5 8. Bxb5 dxe4 9. Bc6 Rb8 10. Bxa7 Rxb2 11. Na4 Qc7 12. Nxb2 Qxa7 13. Qc3 Bg7 14. Bxe4 0-0 15. Qb4 Nxe4 16. fxe4 Qe3+ 17. Ne2 Ba6 18. c4 Rb8 19. Qd2 Qxd2+ 20. Kxd2 Rxb2+ 21. Ke3 Bxc4 22. Nf4 Bxa2 23. Rac1 Nc5 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.11.09"]
[Round "2"]
[White "Van der Knaap, Jan"]
[Black "Pijpers, Arthur"]
[Result "0-1"]
[ECO "B25"]
[WhiteElo "1769"]
[BlackElo "2483"]
[PlyCount "66"]
[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 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. f4 e6 7. Nf3 Nge7 8. 0-0 0-0 9. Be3 Rb8 10. a4 Nd4 11. e5 Nef5 12. Bf2 b6 13. exd6 Qxd6 14. Ne4 Qc7 15. Ne5 Bb7 16. c3 Nc6 17. Nxc6 Bxc6 18. Qc2 h5 19. Rfd1 Rfd8 20. Rac1 Qb7 21. Kh1 Rd7 22. a5 Rbd8 23. Qe2 c4 24. d4 Nd6 25. d5 Bxd5 26. Rxd5 exd5 27. Nxd6 Rxd6 28. f5 Qd7 29. axb6 axb6 30. Bh3 Qe8 31. Qd2 d4 32. cxd4 Bxd4 33. Bxd4 Rxd4 0-1

[Event "Leiden SB-ch 1819"]
[Site "Leiden"]
[Date "2018.10.19"]
[Round "1"]
[White "Hoogeveen, Luuk"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "1550"]
[BlackElo "1769"]
[PlyCount "54"]
[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. Nf3 d6 2. g3 e5 3. d3 f5 4. e4 Nf6 5. Bg2 Nc6 6. Nc3 Be7 7. exf5 Bxf5 8. Ng5 h6 9. Nge4 0-0 10. Nxf6+ Bxf6 11. Qh5 Qd7 12. Bxh6 gxh6 13. Qxh6 Qh7 14. Qe3 Nd4 15. 0-0-0 c6 16. Ne4 Be7 17. h4 Qh5 18. f3 Bxe4 19. g4 Qg6 20. fxe4 Rf4 21. g5 Qh5 22. c3 Qe2 23. Qxe2 Nxe2+ 24. Kd2 Rf2 25. Bh3 Ng3+ 26. Ke3 Nxh1 27. Rxh1 Raf8 0-1

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.19"]
[Round "6"]
[White "Van der Knaap, Jan"]
[Black "Ten Brinke, Jan"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1829"]
[BlackElo "1765"]
[PlyCount "66"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 Nh6 7. b4 cxd4 8. cxd4 Bd7 9. Bb2 Nf5 10. g4 Nfe7 11. Bd3 h5 12. g5 g6 13. Nbd2 Qd8 14. Nb3 b5 15. Qe2 a5 16. Bxb5 axb4 17. Nc5 Nf5 18. Nxd7 Kxd7 19. Qc2 Qb6 20. a4 Be7 21. Rc1 Rhc8 22. 0-0 Rc7 23. Qd3 Kd8 24. Rc2 Rac8 25. Rfc1 Na5 26. Rxc7 Rxc7 27. Rxc7 Qxc7 28. Kf1 Nc4 29. Ba1 Na5 30. Bb2 b3 31. Nd2 Qc2 32. Bc3 Qd1+ 33. Kg2 Nh4+ 0-1

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.17"]
[Round "5"]
[White "Lammers, Anton"]
[Black "Van der Knaap, Jan"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "1756"]
[BlackElo "1829"]
[PlyCount "73"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be3 a6 6. Qd2 b5 7. a3 Bb7 8. Bd3 0-0 9. Bh6 Nbd7 10. h4 Bxh6 11. Qxh6 Ng4 12. Qf4 h5 13. Nh2 e5 14. dxe5 dxe5 15. Qg3 Ndf6 16. Nxg4 Nxg4 17. 0-0-0 Qf6 18. f3 Ne3 19. Rd2 Qf4 20. Qf2 f5 21. Re1 fxe4 22. Qxe3 exd3 23. Qxd3 Kg7 24. Qe2 Rae8 25. Kb1 Qxh4 26. Nd5 Rf7 27. g4 hxg4 28. fxg4 Bxd5 29. Rxd5 e4 30. Qe3 Qxg4 31. Rh1 Qf3 32. Qc3+ Qf6 33. Qh3 Kf8 34. Qh8+ Qxh8 35. Rxh8+ Ke7 36. Re5+ Kd6 37. Rhxe8 1-0

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.16"]
[Round "4"]
[White "Van der Knaap, Jan"]
[Black "Cchung, Chi Yun"]
[Result "1/2-1/2"]
[ECO "B24"]
[WhiteElo "1829"]
[BlackElo "1791"]
[PlyCount "36"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. f4 Nge7 7. Nf3 d5 8. e5 0-0 9. 0-0 f6 10. exf6 Bxf6 11. Re1 Nf5 12. g4 Nfd4 13. Ne2 e5 14. Nexd4 exd4 15. h3 Qd6 16. Bd2 b5 17. a4 b4 18. Qe2 Bd7 1/2-1/2

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.15"]
[Round "3"]
[White "Scherpenisse, Kees"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "A41"]
[WhiteElo "1915"]
[BlackElo "1829"]
[PlyCount "27"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Bg4 5. e3 c5 6. Be2 cxd4 7. exd4 Nh6 8. h3 Bxf3 9. Bxf3 Nc6 10. Bxc6+ bxc6 11. 0-0 0-0 12. Bxh6 Bxh6 13. Qc2 Rb8 14. b3 1/2-1/2

[Event "Leiden op-B 12th"]
[Site "Leiden"]
[Date "2018.07.14"]
[Round "2"]
[White "Koes, Richard"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "B09"]
[WhiteElo "1762"]
[BlackElo "1829"]
[PlyCount "72"]
[EventDate "2018.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. dxc5 Qa5 7. Bd2 Qxc5 8. Bd3 0-0 9. Qe2 Bg4 10. Be3 Qa5 11. 0-0 Nc6 12. h3 Bxf3 13. Qxf3 Nd7 14. Ne2 Rac8 15. c3 Nde5 16. fxe5 Nxe5 17. Qg3 Nxd3 18. Bd4 Bxd4+ 19. Nxd4 Nxb2 20. Rf3 Nc4 21. Nf5 Rc7 22. Qg5 Qe5 23. Raf1 e6 24. Nh6+ Kg7 25. Qc1 Qxe4 26. Ng4 f5 27. Qh6+ Kg8 28. Rf4 Qc6 29. Qh4 e5 30. Nh6+ Kh8 31. Rxf5 gxf5 32. Rxf5 Qc5+ 33. Kh2 d5 34. Rg5 Qd6 35. Nf5 Qf6 36. Ng3 Rg7 0-1

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2018.05.11"]
[Round "3"]
[White "Rubingh, Otto"]
[Black "Van der Knaap, Jan"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2146"]
[BlackElo "1911"]
[PlyCount "105"]
[EventDate "2018.05.10"]
[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 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Bg4 5. e3 c5 6. Be2 cxd4 7. exd4 Nh6 8. Qb3 Qc8 9. d5 0-0 10. 0-0 Nf5 11. Nb5 Nd7 12. Bg5 h6 13. Be3 Nxe3 14. fxe3 a6 15. Nbd4 Rb8 16. Rac1 Ne5 17. Qa3 Qd7 18. Rfd1 Rfc8 19. b4 Nxf3+ 20. gxf3 Bh3 21. Qd3 Rc7 22. Kh1 Rbc8 23. Rg1 Qa4 24. Rg3 Bd7 25. Ne6 Qxb4 26. Nxc7 Rxc7 27. Rcg1 Qb2 28. a3 Rc5 29. Rb1 Qe5 30. Rxb7 Ba4 31. f4 Qf6 32. Rg1 Kh7 33. Qe4 e6 34. Bd1 exd5 35. cxd5 Bxd1 36. Rxd1 Rc8 37. Rb6 a5 38. Rb5 Qc3 39. Qd3 Qc7 40. Rdb1 Qd8 41. a4 Rc3 42. Qe4 Ra3 43. Rb8 Qf6 44. Qe8 g5 45. Qe4+ Qg6 46. Qxg6+ Kxg6 47. R1b6 Rxa4 48. Rxd6+ Kf5 49. Rd7 gxf4 50. Rxf7+ Kg6 51. Rxf4 Ra2 52. Rg4+ Kf6 53. Rb6+ 1-0

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2018.05.10"]
[Round "1"]
[White "Clemens, Adrian HP"]
[Black "Van der Knaap, Jan"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2179"]
[BlackElo "1911"]
[PlyCount "57"]
[EventDate "2018.05.10"]
[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 d6 2. c4 e5 3. d5 f5 4. e4 Nf6 5. exf5 Bxf5 6. Ne2 Nbd7 7. Ng3 Bg6 8. Nc3 Be7 9. Be2 0-0 10. Be3 c6 11. 0-0 Nb6 12. Qb3 Qc7 13. Rac1 Kh8 14. h3 c5 15. Qd1 Rae8 16. Bd3 Bxd3 17. Qxd3 Qd7 18. b3 Nc8 19. f4 exf4 20. Bxf4 Ng8 21. Nce4 h6 22. Bd2 Bf6 23. Nxf6 Nxf6 24. Bc3 Ng8 25. Nh5 Rxf1+ 26. Rxf1 Re7 27. Rf8 Nb6 28. Qg6 a6 29. Qxh6# 1-0

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.23"]
[Round "9"]
[White "Van Ginkel, Henk"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "B09"]
[WhiteElo "1846"]
[BlackElo "1866"]
[PlyCount "89"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. e5 Nfd7 7. dxc5 dxe5 8. fxe5 Nxe5 9. Qxd8+ Kxd8 10. Nxe5 Bxe5 11. Bc4 Bf5 12. Be3 e6 13. 0-0-0+ Ke7 14. Bd4 Nc6 15. Bxe5 Nxe5 16. Bb5 a6 17. Be2 Rad8 18. h3 h5 19. Rhe1 f6 20. b4 h4 21. Kb2 g5 22. Kb3 g4 23. hxg4 Nxg4 24. Rxd8 Rxd8 25. Bf3 Rd2 26. Bxb7 Bxc2+ 27. Ka3 Bd3 28. Nd5+ Kf7 29. Nb6 Ne5 30. Kb3 Rc2 31. Rh1 Ng6 32. Rh3 Bf5 33. Rc3 Rxc3+ 34. Kxc3 e5 35. Bxa6 Be4 36. Bc4+ Ke7 37. Nd5+ Kd8 38. Ne3 Nf4 39. Bf1 Nxg2 40. Ng4 h3 41. b5 f5 42. Nh2 Nf4 43. Kd2 Kc7 44. a4 Kb7 45. a5 1/2-1/2

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.22"]
[Round "8"]
[White "Van der Knaap, Jan"]
[Black "Coiffait, Casimir"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1866"]
[BlackElo "1853"]
[PlyCount "94"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. a3 f6 7. Bd3 fxe5 8. Nxe5 Nxe5 9. dxe5 g6 10. 0-0 Nh6 11. Nd2 Nf7 12. f4 Bg7 13. Nf3 Qc7 14. Be3 0-0-0 15. b4 c4 16. Bc2 g5 17. Qe2 gxf4 18. Bxf4 Rdf8 19. Rae1 Qd8 20. Qe3 Kb8 21. Nd4 h5 22. Bg6 Nh6 23. h3 h4 24. Bg5 Qc8 25. Rf4 Be8 26. Bc2 Nf7 27. Bf6 Bh6 28. Bxh8 Rxh8 29. Qf2 Bxf4 30. Qxf4 Qd7 31. Rf1 Qe7 32. Bg6 Nd8 33. Qf6 Qxf6 34. Rxf6 Bxg6 35. Rxg6 Rh5 36. Nxe6 Nxe6 37. Rxe6 Kc7 38. Kf2 Rg5 39. Re7+ Kc6 40. Rh7 Rf5+ 41. Kg1 Rf4 42. Rh6+ Kc7 43. Rd6 d4 44. cxd4 c3 45. Rd5 b6 46. e6 c2 47. Rd7+ Kc8 0-1

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.21"]
[Round "7"]
[White "Holwijn, Melvin"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1932"]
[BlackElo "1866"]
[PlyCount "46"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Bg4 5. e3 c5 6. Be2 cxd4 7. exd4 Nh6 8. h3 Bxf3 9. Bxf3 Nc6 10. g4 0-0 11. h4 e5 12. Bxc6 bxc6 13. dxe5 Re8 14. Qe2 Bxe5 15. Be3 Qa5 16. 0-0 Qd8 17. g5 Nf5 18. Qg4 d5 19. Bf4 Qc7 20. Bxe5 Rxe5 21. cxd5 cxd5 22. Rae1 Qd6 23. Qf4 Rxe1 0-1

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.20"]
[Round "6"]
[White "Van Deutekom, Yde"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "1858"]
[BlackElo "1866"]
[PlyCount "66"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. d4 d6 2. c4 e5 3. e4 exd4 4. Qxd4 Nc6 5. Qd1 g6 6. Bd3 Bg7 7. Nf3 Bg4 8. 0-0 Nf6 9. h3 Bxf3 10. Qxf3 Ne5 11. Qe2 Nxd3 12. Qxd3 Nd7 13. Nd2 0-0 14. Rb1 Nc5 15. Qc2 a5 16. b3 Re8 17. Bb2 Bxb2 18. Rxb2 Qh4 19. Re1 Re7 20. a3 Rae8 21. e5 dxe5 22. b4 axb4 23. axb4 Nd7 24. Ne4 f5 25. Nc3 Qxc4 26. Qd2 Nf6 27. Rc1 Rd7 28. Qh6 Red8 29. g3 Ne4 30. Ne2 Rd1+ 31. Rxd1 Rxd1+ 32. Kg2 Nc3 33. Nxc3 Qf1+ 0-1

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.18"]
[Round "5"]
[White "Van der Knaap, Jan"]
[Black "Van der Laan, Hugo"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1866"]
[BlackElo "1699"]
[PlyCount "79"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Nf6 5. d3 g6 6. f4 Bg7 7. Nf3 0-0 8. 0-0 e6 9. h3 Bd7 10. g4 Ne7 11. e5 dxe5 12. Nxe5 Nfd5 13. Ne4 Nc6 14. Nxd7 Qxd7 15. c3 b6 16. Qf3 f5 17. Ng3 fxg4 18. hxg4 Nde7 19. Qe4 Rae8 20. Bd2 Nd8 21. Rad1 Nc8 22. Bc1 Nd6 23. Qe2 N8f7 24. Ne4 Qe7 25. Qe1 Nh6 26. Qg3 Nhf7 27. Rde1 Qd8 28. Bh3 Re7 29. Re2 Rfe8 30. Rfe1 Nf5 31. gxf5 exf5 32. Bxf5 Nd6 33. Bg4 Nf5 34. Bxf5 Qd5 35. Bg4 Qd8 36. f5 Bf8 37. Qh3 gxf5 38. Bxf5 Rg7+ 39. Rg2 Ree7 40. Qxh7+ 1-0

[Event "Leiden LCT op-B 11th"]
[Site "Leiden"]
[Date "2017.07.17"]
[Round "4"]
[White "Koes, Richard"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "B07"]
[WhiteElo "1818"]
[BlackElo "1866"]
[PlyCount "35"]
[EventDate "2017.07.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2018"]
[Source "ChessBase"]
[SourceDate "2017.10.13"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.13"]
[SourceQuality "1"]

1. Nc3 g6 2. e4 d6 3. f4 Bg7 4. Nf3 Nf6 5. Be2 c5 6. d3 Nc6 7. Be3 0-0 8. Qd2 Rb8 9. 0-0-0 b5 10. Kb1 b4 11. Nd5 e6 12. Nxf6+ Qxf6 13. d4 cxd4 14. Nxd4 Nxd4 15. Bxd4 Qxd4 16. Qxd4 Bxd4 17. Rxd4 Rb6 18. Rhd1 1/2-1/2

[Event "Leiden LCT op-B 09th"]
[Site "Leiden"]
[Date "2015.07.20"]
[Round "4"]
[White "Braggaar, Wessel"]
[Black "Van der Knaap, Jan"]
[Result "1-0"]
[ECO "B09"]
[WhiteElo "1835"]
[BlackElo "1888"]
[PlyCount "79"]
[EventDate "2015.07.17"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. dxc5 Qa5 7. Bd3 Qxc5 8. Qe2 Bg4 9. Be3 Qa5 10. 0-0 0-0 11. h3 Bxf3 12. Qxf3 Nc6 13. a3 Nd7 14. Rab1 a6 15. Ne2 Qc7 16. Qf2 b5 17. b4 Rab8 18. c4 bxc4 19. Bxc4 Qb7 20. Rfc1 Nb6 21. Bxa6 Qxa6 22. Rxc6 Qd3 23. Rbc1 Na4 24. Rc7 Qxa3 25. Rxe7 Qxb4 26. f5 Bf6 27. Rec7 g5 28. R7c4 Qa3 29. Bd4 Bxd4 30. Qxd4 Nc5 31. Kh2 Qd3 32. Qxd3 Nxd3 33. R1c3 Ne5 34. Rd4 Rb2 35. Ng3 Ra8 36. Nh5 h6 37. Rxd6 Raa2 38. Rg3 Kf8 39. f6 Ke8 40. Ng7+ 1-0

[Event "Leiden LCT op-B 09th"]
[Site "Leiden"]
[Date "2015.07.19"]
[Round "3"]
[White "Van der Knaap, Jan"]
[Black "Piket, Theo"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1888"]
[PlyCount "63"]
[EventDate "2015.07.17"]
[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 c5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Bd7 5. d3 g6 6. f4 Bg7 7. Nf3 f5 8. 0-0 a6 9. a4 Nf6 10. exf5 Bxf5 11. Re1 0-0 12. h3 Bd7 13. Ne4 Nxe4 14. dxe4 Qc7 15. c3 Rae8 16. Be3 Kh8 17. Rc1 c4 18. Nd4 Na5 19. Rf1 e5 20. fxe5 dxe5 21. Rxf8+ Rxf8 22. Nf3 Nb3 23. Rb1 Bxa4 24. Qd5 Rd8 25. Qe6 Rd6 26. Qg4 Bd7 27. Qh4 Bc6 28. Ng5 Bf6 29. Rf1 Qg7 30. Rxf6 Rxf6 31. Nxh7 Rd6 32. Nf6+ 1-0

[Event "Leiden LCT op-B 7th"]
[Site "Leiden"]
[Date "2013.07.16"]
[Round "5"]
[White "Van der Knaap, Jan"]
[Black "Van der Maat, Niek"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "1844"]
[BlackElo "1949"]
[PlyCount "55"]
[EventDate "2013.07.12"]
[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 g6 2. d4 Bg7 3. Nc3 c5 4. dxc5 Bxc3+ 5. bxc3 Qa5 6. Bd2 Qxc5 7. Bd3 Nf6 8. Ne2 0-0 9. 0-0 b6 10. Be3 Qc7 11. f3 Ba6 12. Qe1 d6 13. Qh4 Ne8 14. f4 Ng7 15. f5 Bxd3 16. cxd3 f6 17. Qh6 g5 18. Rf3 Rf7 19. Rh3 Ne8 20. Rf1 Nc6 21. d4 Na5 22. Rg3 Rg7 23. h4 gxh4 24. Rxg7+ Nxg7 25. Rf4 Kf7 26. Qxh7 Rg8 27. Rg4 e5 28. fxe6+ 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.07.02"]
[Round "7"]
[White "Van der Knaap, Jan"]
[Black "Lauer, Albert"]
[Result "1-0"]
[ECO "C91"]
[BlackElo "1886"]
[PlyCount "63"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[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. d4 Bg4 10. d5 Na5 11. Bc2 Nb7 12. Nbd2 Qd7 13. h3 Bh5 14. Nf1 g5 15. Ng3 Bxf3 16. Qxf3 g4 17. hxg4 Nxg4 18. Nf5 h5 19. Qh3 Nf6 20. Qg3+ Ng4 21. f3 Kh7 22. fxg4 Rg8 23. Qh3 h4 24. g5 Rh8 25. Qxh4+ Kg6 26. Qg4 Qd8 27. Rf1 Rh7 28. Be3 Qf8 29. Nxe7+ Qxe7 30. Rf6+ Kg7 31. Raf1 Rf8 32. g6 1-0

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.25"]
[Round "6"]
[White "Kuiper, Machiel"]
[Black "Van der Knaap, Jan"]
[Result "0-1"]
[ECO "A40"]
[PlyCount "82"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 g6 3. e3 Bg7 4. Bd3 Nd7 5. 0-0 e5 6. c4 Qe7 7. Nc3 Ngf6 8. Qc2 0-0 9. d5 Nc5 10. e4 a5 11. Be3 Ne8 12. Be2 f5 13. Bg5 Nf6 14. Bd3 f4 15. h3 h6 16. Bxf6 Bxf6 17. Nh2 Kh8 18. Be2 Rg8 19. a3 a4 20. Qd1 Bd7 21. Bg4 h5 22. Bxd7 Qxd7 23. f3 Bh4 24. Qc2 Rg7 25. Rab1 Nb3 26. Ne2 g5 27. Rbd1 Rag8 28. Rd3 Bg3 29. Kh1 Bxh2 30. Kxh2 g4 31. Ng1 Nd4 32. Qd2 Rg6 33. Kh1 Qg7 34. Rf2 gxf3 35. Nxf3 Nb3 36. Qc2 Rg3 37. Rd1 Nc5 38. Rg1 Qg6 39. Re2 Rxf3 40. Kh2 Rxh3+ 41. Kxh3 Qg3# 0-1

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.18"]
[Round "5"]
[White "Van der Knaap, Jan"]
[Black "Stins, Johan"]
[Result "1/2-1/2"]
[ECO "B24"]
[BlackElo "1880"]
[PlyCount "68"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 Nf6 4. g3 e6 5. Bg2 d5 6. exd5 Nxd5 7. Nxd5 exd5 8. d4 Be6 9. 0-0 Rc8 10. Re1 Be7 11. dxc5 0-0 12. Be3 d4 13. Nxd4 Nxd4 14. Bxd4 Bxc5 15. Bxc5 Rxc5 16. c3 Qc8 17. Qa4 a6 18. Rad1 Qc7 19. Qc2 Ra5 20. a3 Rc8 21. Rd4 Rc5 22. Red1 Qb6 23. Rd6 Qc7 24. Qd2 g6 25. Qd4 Rf8 26. b4 Rxc3 27. Qf6 Rc1 28. Qd4 Bb3 29. Rxc1 Qxc1+ 30. Bf1 Qxa3 31. Rd8 Qc1 32. Rxf8+ Kxf8 33. Qd8+ Kg7 34. Qd4+ Kf8 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.06.11"]
[Round "4"]
[White "Van Lankveld, Koen"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "A21"]
[PlyCount "54"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. c4 e5 2. g3 d6 3. Bg2 f5 4. Nc3 Nf6 5. d3 Be7 6. e4 Nc6 7. Nge2 0-0 8. 0-0 Kh8 9. h3 Qe8 10. exf5 Bxf5 11. d4 a6 12. Be3 Qd7 13. g4 Bg6 14. dxe5 Nxe5 15. Nf4 c6 16. b3 Bf7 17. Na4 Bd8 18. Nb6 Bxb6 19. Bxb6 h6 20. Re1 Ng6 21. Nxg6+ Bxg6 22. Qd4 Rae8 23. f4 Rxe1+ 24. Rxe1 Re8 25. Rxe8+ Nxe8 26. f5 Bf7 27. Kf1 Qe7 1/2-1/2

[Event "Leiden SB-ch"]
[Site "Leiden"]
[Date "2013.05.21"]
[Round "1"]
[White "Van der Knaap, Jan"]
[Black "Van Wessel, Rudy"]
[Result "0-1"]
[ECO "B24"]
[BlackElo "2387"]
[PlyCount "60"]
[EventDate "2013.05.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 e6 4. Bg2 Nf6 5. d3 d5 6. f4 dxe4 7. Nxe4 Be7 8. Be3 Nd5 9. Bf2 0-0 10. Nf3 b6 11. 0-0 Bb7 12. Bh3 h6 13. a3 Qc7 14. f5 exf5 15. Bxf5 g6 16. Bh3 f5 17. Nc3 Nxc3 18. bxc3 Bf6 19. Qd2 Qg7 20. d4 Rad8 21. Rad1 Ne7 22. Bg2 Be4 23. Qc1 Nd5 24. Qb2 Kh7 25. Qb3 c4 26. Qb2 Qb7 27. Ne1 Bg5 28. Nf3 Be7 29. Ne5 Bxg2 30. Kxg2 Nf4+ 0-1

[Event "Leiden LCT op-B 06th"]
[Site "Leiden"]
[Date "2012.07.14"]
[Round "8"]
[White "Van der Knaap, Jan"]
[Black "De Boer, Ruurd"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "77"]
[EventDate "2012.07.06"]
[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 cxd4 7. cxd4 Bd7 8. b4 a6 9. Bb2 f6 10. Bd3 Be7 11. 0-0 Nh6 12. Nc3 fxe5 13. Nxe5 Nxe5 14. dxe5 0-0 15. Ne2 Nf5 16. Nd4 Rae8 17. Rc1 Bg5 18. Rc5 Be7 19. Rc1 g6 20. Nxf5 exf5 21. Bc4 Be6 22. Bxd5 Bg5 23. Rc5 Rf7 24. Qb3 Rfe7 25. Rd1 Kf8 26. Bxe6 Rxe6 27. Rd7 R8e7 28. Rc8+ Kf7 29. Bd4 Qb5 30. Rdd8 Qe2 31. Rf8+ Kg7 32. Rg8+ Kh6 33. Qh3+ Qh5 34. Rc3 f4 35. Qd3 Bf6 36. Qc2 Rxe5 37. Bxe5 Rxe5 38. Qd2 Re2 39. Qxf4+ 1-0

[Event "Leiden LCT op-B 06th"]
[Site "Leiden"]
[Date "2012.07.10"]
[Round "5"]
[White "Van der Knaap, Jan"]
[Black "Wallace, Mitchel"]
[Result "0-1"]
[ECO "C41"]
[BlackElo "1852"]
[PlyCount "64"]
[EventDate "2012.07.06"]
[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 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. 0-0 c6 7. a4 a5 8. Re1 h6 9. b3 Qc7 10. Bb2 Nf8 11. h3 Ng6 12. Bd3 Be6 13. Ne2 Nh5 14. Qd2 Bf6 15. Bc3 Nhf4 16. Nxf4 Nxf4 17. Bf1 g5 18. dxe5 dxe5 19. Qe3 g4 20. hxg4 Bxg4 21. Nh2 h5 22. f3 Be6 23. Rad1 b6 24. g3 Rg8 25. Qf2 Bh4 26. Ng4 hxg4 27. gxh4 gxf3+ 28. Kh2 f6 29. Bd2 Qh7 30. Bxf4 exf4 31. Qxf3 Qxh4+ 32. Bh3 Rg3 0-1

[Event "Leiden LCT op-B 06th"]
[Site "Leiden"]
[Date "2012.07.09"]
[Round "4"]
[White "Baak, Karl"]
[Black "Van der Knaap, Jan"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "81"]
[EventDate "2012.07.06"]
[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 d6 2. e4 Nf6 3. Nc3 g6 4. Bg5 Bg7 5. Qd2 h6 6. Bh4 g5 7. Bg3 Nh5 8. Nge2 Nc6 9. 0-0-0 e6 10. Qe3 Bd7 11. h4 Nxg3 12. Nxg3 gxh4 13. Nh5 Bf6 14. Nb5 Be7 15. Kb1 a6 16. Nc3 b5 17. e5 d5 18. Nf6+ Bxf6 19. exf6 Bc8 20. Be2 Bb7 21. Bf3 Na5 22. b3 Qxf6 23. Bxd5 0-0-0 24. Ne4 Qe7 25. Bxb7+ Nxb7 26. Qf4 Rhg8 27. Rxh4 Rxg2 28. Nf6 Rg6 29. Rxh6 Rxh6 30. Qxh6 Nd6 31. Qf4 Nf5 32. Ng4 Qb4 33. Qe4 Rxd4 34. Qa8+ Kd7 35. Ne5+ Kd6 36. Rxd4+ Qxd4 37. Nxf7+ Ke7 38. Ng5 Qd1+ 39. Kb2 Qd4+ 40. Kb1 Qd1+ 41. Kb2 1/2-1/2

[Event "Leiden LCT op-B 06th"]
[Site "Leiden"]
[Date "2012.07.07"]
[Round "2"]
[White "Van der Knaap, Jan"]
[Black "Binnendijk, Wilfried"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "81"]
[EventDate "2012.07.06"]
[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 cxd4 7. cxd4 Nh6 8. b4 Nf5 9. Bb2 Be7 10. Bd3 Bd7 11. Bxf5 exf5 12. Nc3 Be6 13. 0-0 0-0 14. Na4 Qb5 15. Rc1 a5 16. Nc3 Qb6 17. b5 Na7 18. Qb3 Rac8 19. Nxd5 Bxd5 20. Qxd5 Rfd8 21. Rxc8 Rxc8 22. Qd7 Qxb5 23. Qxe7 Qxb2 24. Ng5 Rf8 25. e6 f6 26. Nxh7 Rc8 27. Nxf6+ gxf6 28. Qf7+ Kh8 29. e7 Qb5 30. Qxf6+ Kg8 31. Qe6+ Kg7 32. d5 Re8 33. Re1 Nc8 34. d6 Nb6 35. h3 Qd7 36. Qe5+ Kf7 37. Re3 Rg8 38. Rf3 Ke8 39. Rxf5 Nc8 40. Qd5 Rh8 41. Qf7# 1-0

[Event "Leiden LCT op 3rd"]
[Site "Leiden"]
[Date "2009.07.17"]
[Round "7"]
[White "Van der Knaap, Jan"]
[Black "Rekelhof, Martin"]
[Result "1-0"]
[ECO "B09"]
[BlackElo "1784"]
[PlyCount "61"]
[EventDate "2009.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 131 Extra"]
[Source "ChessBase"]
[SourceDate "2009.09.03"]
[SourceVersion "2"]
[SourceVersionDate "2009.09.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. f4 Nf6 5. Nf3 c6 6. Be2 0-0 7. 0-0 b5 8. e5 Ng4 9. h3 Nh6 10. a4 b4 11. Ne4 Bb7 12. Nfg5 Bc8 13. Be3 f6 14. Nf3 Nf5 15. Bf2 fxe5 16. fxe5 dxe5 17. Bc4+ Kh8 18. Nfg5 Nh6 19. d5 Bf5 20. g4 Bxe4 21. Nxe4 Rf4 22. Qd3 Qc8 23. Be3 Rf8 24. Rxf8+ Bxf8 25. Rf1 Bg7 26. Ng5 Qe8 27. Ne6 Qd7 28. Nxg7 Kxg7 29. Bxh6+ Kxh6 30. Rf7 Qe8 31. g5+ 1-0

