[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.08"]
[Round "9"]
[White "Knottnerus, Ivo"]
[Black "Meng, Roger"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1876"]
[BlackElo "2256"]
[PlyCount "72"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 g6 6. 0-0 Bg7 7. Be3 d6 8. c4 Nf6 9. f4 0-0 10. f5 Nc6 11. Nxc6 bxc6 12. Qe2 exf5 13. exf5 Re8 14. Qd2 Ng4 15. Bf2 Bh6 16. Qc2 Nxf2 17. fxg6 hxg6 18. Rxf2 Be3 19. Nd2 Bxf2+ 20. Kxf2 Qh4+ 21. Kg1 Re1+ 22. Rxe1 Qxe1+ 23. Nf1 Qe6 24. Qf2 Qe5 25. Ne3 Be6 26. Kh1 a5 27. Qf3 Rb8 28. b3 Qa1+ 29. Bf1 Qxa2 30. Qxc6 Qf2 31. Qxd6 Rxb3 32. Qd8+ Kh7 33. g3 Rxe3 34. Qh4+ Kg7 35. Qd4+ Qf6 36. Qxe3 Qxf1+ 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.06"]
[Round "7"]
[White "Knottnerus, Ivo"]
[Black "Haver, Daan"]
[Result "1-0"]
[ECO "B77"]
[WhiteElo "1876"]
[BlackElo "1847"]
[PlyCount "101"]
[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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4 Bd7 10. 0-0-0 Rb8 11. Bb3 Na5 12. g4 b5 13. Bh6 Bxh6 14. Qxh6 e5 15. Nf5 Nxb3+ 16. axb3 gxf5 17. gxf5 Kh8 18. Rhg1 Rg8 19. Rxg8+ Nxg8 20. Qxd6 Rb7 21. Qxe5+ Qf6 22. Qd5 Bc6 23. Qc5 b4 24. Rd6 Qg5+ 25. Kb1 bxc3 26. Qxc3+ f6 27. Rxc6 Qg1+ 28. Ka2 Qxh2 29. Rc8 Kg7 30. Rxg8+ Kxg8 31. Qc8+ Kg7 32. Qxb7+ Kh6 33. c4 Qf2 34. Qe7 Qb6 35. b4 Kg5 36. Qg7+ Kf4 37. Qg4+ Ke5 38. Qg3+ Kd4 39. Kb3 Kd3 40. Qe1 Qc6 41. Qc3+ Ke2 42. b5 Qb6 43. Kc2 h5 44. c5 Qxb5 45. c6 Qa6 46. c7 Qc8 47. Qd3+ Kf2 48. Qd8 Qa6 49. c8Q Qa4+ 50. Kb1 Kxf3 51. Qd3+ 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.05"]
[Round "6"]
[White "Knottnerus, Ivo"]
[Black "Veltkamp, Bastiaan"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "1876"]
[BlackElo "1796"]
[PlyCount "141"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 d6 7. Qe2 Be7 8. Be3 0-0 9. f4 Qc7 10. c4 b6 11. Nc3 Bb7 12. Rac1 Nbd7 13. b4 Rac8 14. a3 Qb8 15. g4 g6 16. g5 Nh5 17. Qg4 Ng7 18. Nf3 f5 19. gxf6 Nxf6 20. Qh3 Rce8 21. Ng5 Bc8 22. e5 dxe5 23. Nxh7 exf4 24. Bxg6 Nfh5 25. Bxh5 e5 26. Qg2 Kxh7 27. Bxe8 Nxe8 28. Bxf4 Rg8 29. Bg3 Be6 30. Kh1 Qc8 31. Nd5 Bg5 32. Qe4+ Rg6 33. Rc3 Nd6 34. Qxe5 Nxc4 35. Qc7+ Qxc7 36. Nxc7 Bg8 37. Rd1 b5 38. Nd5 Be6 39. Nf4 Bxf4 40. Bxf4 Bc8 41. Bg3 Re6 42. Re1 Rf6 43. a4 Kg6 44. axb5 axb5 45. Kg1 Bb7 46. Bh4 Rf4 47. Re6+ Kh5 48. Bd8 Rf8 49. Rh3+ Kg4 50. Rg3+ Kf5 51. Re7 Be4 52. Rd7 Ne5 53. Rd1 Nf3+ 54. Kg2 Kf4 55. Bc7+ Ke3 56. Re1+ Kd4 57. Bb6+ Kd5 58. Rd1+ Kc6 59. Bc5 Rf6 60. Rg8 Ne5+ 61. Kh3 Nd3 62. Ra1 Nxc5 63. Rc8+ Kb6 64. Rxc5 Rf2 65. Re5 Bd3 66. Rg1 Rf4 67. Re6+ Kc7 68. Rg7+ Kd8 69. Rd6+ Ke8 70. Rxd3 Rxb4 71. Ra3 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.04"]
[Round "5"]
[White "Kollen, Zyon"]
[Black "Knottnerus, Ivo"]
[Result "1-0"]
[ECO "B19"]
[WhiteElo "2175"]
[BlackElo "1876"]
[PlyCount "89"]
[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. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. 0-0-0 Be7 13. Qe2 Qc7 14. Ne5 c5 15. Nxd7 Nxd7 16. d5 Qe5 17. Qxe5 Nxe5 18. dxe6 fxe6 19. Rhe1 Bf6 20. Bc3 Ng4 21. Bxf6 Nxf6 22. Rxe6+ Kf7 23. Re5 b6 24. Ne4 Rhd8 25. Re1 Rd7 26. Rd1 Rdd8 27. c3 Rxd1+ 28. Kxd1 Rd8+ 29. Ke2 Rd5 30. Rxd5 Nxd5 31. g3 Ke6 32. f4 Ne7 33. g4 Kd5 34. Ke3 b5 35. Nd2 Ke6 36. Ke4 Kf6 37. Nf3 a5 38. g5+ Ke6 39. Nh4 a4 40. f5+ Kf7 41. gxh6 gxh6 42. Ke5 b4 43. c4 a3 44. b3 Nc6+ 45. Kd5 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.03"]
[Round "4"]
[White "Knottnerus, Ivo"]
[Black "Maris, Ivo"]
[Result "1/2-1/2"]
[ECO "B42"]
[WhiteElo "1876"]
[BlackElo "2011"]
[PlyCount "33"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 d6 6. 0-0 a6 7. c4 Nbd7 8. Nc3 g6 9. Kh1 Bg7 10. Bc2 0-0 11. f4 Re8 12. b3 Qc7 13. Ba3 Bf8 14. Bb2 Bg7 15. Ba3 Bf8 16. Bb2 Bg7 17. Ba3 1/2-1/2

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.02"]
[Round "3"]
[White "Vos, Tjark"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1961"]
[BlackElo "1876"]
[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 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. c4 dxc4 6. Bxc4 e6 7. Bg5 Ne7 8. Nc3 Qc7 9. Rc1 a6 10. Qd2 Nd7 11. Nge2 0-0-0 12. Ng3 Nxe5 13. Nxf5 Nxc4 14. Qe2 Nb6 15. Bxe7 Bxe7 16. Nxg7 Qf4 17. 0-0 Qf6 18. Ne4 Qxg7 19. Rxc6+ bxc6 20. Qxa6+ Kd7 21. Qb7+ Ke8 22. Qxb6 Qxd4 23. Qxc6+ Kf8 24. a4 Qd5 25. Qc3 Rg8 26. Re1 Qd4 27. Qc1 Rg6 28. Qf4 Qxa4 29. Qf3 Qa5 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.05.01"]
[Round "2"]
[White "Vastenhout, Raimond"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1651"]
[BlackElo "1876"]
[PlyCount "120"]
[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. Bd3 Bxd3 5. Qxd3 e6 6. Nf3 Qb6 7. 0-0 c5 8. dxc5 Bxc5 9. Nc3 Qa6 10. Qxa6 Nxa6 11. a3 Rc8 12. Rd1 Ne7 13. Na4 Ng6 14. Nxc5 Nxc5 15. Be3 b6 16. Bxc5 Rxc5 17. c3 Ke7 18. Re1 Rhc8 19. g3 Kd7 20. Nd4 a6 21. Rad1 Ne7 22. f4 g6 23. Kf2 Rd8 24. Rd2 Nc8 25. g4 Ne7 26. h3 Rc4 27. Ke3 h5 28. g5 Nf5+ 29. Nxf5 Re4+ 30. Kf2 Rxf4+ 31. Kg3 Rxf5 32. h4 Rc8 33. Rd4 Kc6 34. Re3 Rf1 35. Rf3 Rxf3+ 36. Kxf3 Kd7 37. Ke3 Kc6 38. Kd3 b5 39. b4 Kb6 40. Rf4 Rc7 41. Rd4 Ra7 42. Rf4 a5 43. Kd4 Rc7 44. Kd3 axb4 45. axb4 Kb7 46. Kd4 Rc4+ 47. Ke3 Rxc3+ 48. Kd4 Rc7 49. Kd3 Kc8 50. Kd4 Kd8 51. Kd3 Ke7 52. Kd4 Rc1 53. Kd3 Rg1 54. Kd4 Rg4 55. Rxg4 hxg4 56. Ke3 Kd7 57. Kf4 Kc6 58. Kxg4 d4 59. Kf3 Kd5 60. Kf4 Kc4 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2011.04.30"]
[Round "1"]
[White "Knottnerus, Ivo"]
[Black "Bijlsma, Nick"]
[Result "0-1"]
[ECO "B61"]
[WhiteElo "1876"]
[BlackElo "2190"]
[PlyCount "98"]
[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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Bd7 7. Qd2 Rc8 8. f4 Nxd4 9. Qxd4 Qa5 10. Bxf6 gxf6 11. Bc4 Qc5 12. Qxc5 Rxc5 13. Bd3 f5 14. exf5 Bxf5 15. Bxf5 Rxf5 16. Ne2 Bg7 17. c3 Kd7 18. a4 Rc8 19. Kd2 Bh6 20. g3 e5 21. Rhf1 Rg8 22. Ke3 Rg6 23. Ke4 Rh5 24. f5 Rg4+ 25. Kf3 Rg7 26. Kg2 Rh4 27. h3 Re4 28. Kf3 Re3+ 29. Kf2 d5 30. Rad1 Kc6 31. g4 Rxh3 32. Rh1 Rxh1 33. Rxh1 Bg5 34. Ng3 h6 35. Nh5 Rg8 36. Ke2 e4 37. c4 d4 38. Nf6 Bxf6 39. Rxh6 Kd6 40. Rxf6+ Ke7 41. Rh6 Rxg4 42. b4 Rg2+ 43. Kf1 Rg5 44. f6+ Ke6 45. b5 b6 46. Rh4 Re5 47. Rf4 Kd6 48. Ke1 Kc5 49. Rh4 Re6 0-1

[Event "Agneaux St Lo op"]
[Site "Agneaux"]
[Date "2010.07.09"]
[Round "3"]
[White "Knottnerus, Ivo"]
[Black "Aubry, Yannis"]
[Result "0-1"]
[ECO "C18"]
[WhiteElo "1726"]
[BlackElo "2011"]
[PlyCount "36"]
[EventDate "2010.07.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "FRA"]
[SourceTitle "CBM 137 Extra"]
[Source "ChessBase"]
[SourceDate "2010.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2010.09.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 0-0 8. Bd3 f5 9. exf6 Rxf6 10. Bg5 Rf7 11. Qh4 g6 12. Ne2 c4 13. Bxg6 hxg6 14. Nf4 Nf5 15. Qg4 Qe8 16. h4 e5 17. Nxd5 exd4+ 18. Kd2 Ne3 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.08"]
[Round "9"]
[White "Knottnerus, Ivo"]
[Black "Kollen, Zyon"]
[Result "1/2-1/2"]
[ECO "C18"]
[BlackElo "1974"]
[PlyCount "122"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qa5 7. Bd2 Qa4 8. Qg4 g6 9. Ra2 Nc6 10. Nf3 Bd7 11. Bd3 c4 12. Be2 0-0-0 13. Bg5 Nce7 14. Bxe7 Nxe7 15. Qg5 Nc6 16. Qf4 Qa5 17. Kd2 Rdf8 18. Rb1 f6 19. Qg3 Qd8 20. Ke1 f5 21. Rab2 b6 22. Qf4 h6 23. h4 Rfg8 24. g3 g5 25. Qe3 f4 26. gxf4 g4 27. Nd2 Ne7 28. Bxc4 dxc4 29. Nxc4 Qc7 30. Nd6+ Kd8 31. Nf7+ Ke8 32. Nxh8 Rxh8 33. Kd2 Kf7 34. h5 b5 35. Qd3 a6 36. Rg1 Rg8 37. Qh7+ Rg7 38. Qe4 Bc6 39. Qe2 Bf3 40. Qd3 Qa5 41. Ra1 Qd8 42. Rbb1 Bd5 43. a4 Bc4 44. Qe4 Qc8 45. axb5 Bxb5 46. Rg1 Qc4 47. Rab1 a5 48. Qd3 Ba6 49. Rb6 Qxd3+ 50. cxd3 Bc8 51. c4 Rg8 52. Rb5 a4 53. d5 Bd7 54. Ra5 Rd8 55. dxe6+ Bxe6 56. Rxa4 Rd4 57. Kc3 Rxf4 58. d4 Rxf2 59. d5 Rf3+ 60. Kb4 Nxd5+ 61. cxd5 Rf4+ 1/2-1/2

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.07"]
[Round "8"]
[White "Von Meijenfeldt, Bart"]
[Black "Knottnerus, Ivo"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2027"]
[PlyCount "53"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 a6 3. g3 e6 4. Bg2 Nc6 5. f4 b5 6. Nf3 Bb7 7. d3 Be7 8. 0-0 d5 9. e5 Qb6 10. Ne2 d4 11. g4 h5 12. g5 h4 13. h3 0-0-0 14. Qe1 Nb4 15. Qd1 Nd5 16. c3 f6 17. cxd4 cxd4 18. Bd2 Bc5 19. a3 b4 20. axb4 Nxb4 21. Bxb4 Qxb4 22. Nd2 Bxg2 23. Kxg2 f5 24. Kf2 Qb5 25. Qc2 Rd7 26. Nb3 Rc7 27. Ra5 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.06"]
[Round "7"]
[White "Maris, Ivo"]
[Black "Knottnerus, Ivo"]
[Result "1/2-1/2"]
[ECO "B50"]
[WhiteElo "1928"]
[PlyCount "65"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 g6 5. 0-0 Bg7 6. Re1 0-0 7. d3 Nc6 8. h3 a6 9. a4 Rb8 10. Nbd2 b5 11. d4 Nd7 12. dxc5 dxc5 13. axb5 axb5 14. Nb3 Qc7 15. Be3 Nce5 16. Nxe5 Bxe5 17. Qc1 Rd8 18. f4 Bg7 19. Bf3 Bb7 20. Qc2 Ra8 21. Qf2 e5 22. f5 c4 23. Rxa8 Bxa8 24. Nd2 Bf8 25. Qh4 Nc5 26. Bg5 Rd7 27. Bg4 Nd3 28. fxg6 hxg6 29. Ra1 Qc5+ 30. Kh2 Ra7 31. Rf1 Be7 32. Rf6 Nf4 33. Rb6 1/2-1/2

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.04"]
[Round "6"]
[White "Knottnerus, Ivo"]
[Black "Brookes, Christopher"]
[Result "1/2-1/2"]
[ECO "B78"]
[BlackElo "2015"]
[PlyCount "104"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 0-0 9. Bc4 Bd7 10. 0-0-0 Rc8 11. Bb3 Nxd4 12. Bxd4 b5 13. Nd5 Nxd5 14. Bxg7 Kxg7 15. exd5 a5 16. a3 b4 17. axb4 axb4 18. Qxb4 Kg8 19. Rhe1 Re8 20. Rd4 Ra8 21. h4 h6 22. g4 Ra1+ 23. Kd2 Rxe1 24. Kxe1 e5 25. dxe6 Qxh4+ 26. Kd1 Bxe6 27. Bxe6 Rxe6 28. Re4 Qh1+ 29. Kd2 Qg2+ 30. Kc1 Qg1+ 31. Kd2 Qf2+ 32. Kc1 Rf6 33. f4 Qg1+ 34. Kd2 Qxg4 35. Qc3 Qf5 36. Ra4 g5 37. Qg3 g4 38. Rb4 h5 39. Rd4 Kg7 40. c4 Re6 41. Rd5 Qb1 42. Rb5 Qe4 43. Rxh5 Qe2+ 44. Kc1 Qxc4+ 45. Kb1 Qe4+ 46. Ka2 Qa4+ 47. Kb1 Qd1+ 48. Ka2 d5 49. Rg5+ Kf6 50. Qc3+ d4 51. Qa5 Qd3 52. Qd8+ Re7 1/2-1/2

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.03"]
[Round "5"]
[White "Knottnerus, Ivo"]
[Black "Beijerinck, Nick"]
[Result "1-0"]
[ECO "B48"]
[BlackElo "2083"]
[PlyCount "103"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. 0-0-0 Bb4 9. f3 Ne5 10. Nb3 b5 11. Qe1 Be7 12. f4 Ng6 13. e5 Ng4 14. Ne4 0-0 15. Bc5 Bxc5 16. Nexc5 f6 17. Bd3 Ne7 18. h3 Nh6 19. Qe4 Rb8 20. Qxh7+ Kf7 21. Ne4 f5 22. Nd6+ Qxd6 23. exd6 Ng6 24. g4 Rh8 25. gxf5 Nxf5 26. Qxh8 Nxh8 27. Bxf5 exf5 28. Nc5 b4 29. Rde1 Ng6 30. Rhg1 Rb6 31. Rd1 Nxf4 32. Rgf1 g5 33. h4 Ne2+ 34. Kb1 Ng3 35. Rfe1 gxh4 36. Re7+ Kf6 37. Nxd7+ Bxd7 38. Rxd7 Rb8 39. Rh7 Ne4 40. Rxh4 Rd8 41. d7 Ke5 42. Rh7 Nc5 43. c4 bxc3 44. bxc3 a5 45. c4 Ke6 46. Rh6+ Ke7 47. Rd5 Ne4 48. Kc2 a4 49. c5 Rf8 50. Rh7+ Kd8 51. c6 Nd6 52. Rxd6 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.02"]
[Round "4"]
[White "Kirana, Marco"]
[Black "Knottnerus, Ivo"]
[Result "1-0"]
[ECO "D77"]
[WhiteElo "2068"]
[PlyCount "85"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 d5 5. 0-0 0-0 6. c4 dxc4 7. Na3 c3 8. bxc3 c5 9. Ne5 Nd5 10. Qb3 e6 11. Nac4 Nc6 12. Ba3 Nxe5 13. Nxe5 Bxe5 14. dxe5 Qa5 15. c4 Nb6 16. Bc1 Nd7 17. f4 Rb8 18. Rd1 Qc7 19. Rd6 b5 20. Be3 bxc4 21. Qxc4 Bb7 22. Rad1 Nb6 23. Qxc5 Qxc5 24. Bxc5 Bxg2 25. Bxb6 axb6 26. Kxg2 Rfc8 27. R1d2 Kf8 28. g4 Ke8 29. f5 Rc5 30. fxe6 Rxe5 31. exf7+ Kxf7 32. Kf3 b5 33. R6d4 Ra8 34. Kf4 Rc5 35. Rd7+ Kg8 36. Rb7 Rf8+ 37. Kg3 Re8 38. Rdd7 h6 39. Kh4 Rc3 40. Rxb5 g5+ 41. Kh5 Rh3+ 42. Kg6 Rxh2 43. Re5 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.05.01"]
[Round "3"]
[White "Knottnerus, Ivo"]
[Black "Lentjes, Noud"]
[Result "1-0"]
[ECO "C18"]
[BlackElo "1907"]
[PlyCount "89"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Qg4 Ne7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 Nbc6 11. f4 dxc3 12. Qd3 Bd7 13. Nxc3 a6 14. Ne2 Nf5 15. h3 Na5 16. g4 Bb5 17. Qc3 Qxc3+ 18. Nxc3 Bxf1 19. Rxf1 Nd4 20. Ra2 Rc8 21. Ne2 Rxc2 22. Rxc2 Nxc2+ 23. Kd1 Na1 24. Rf3 N1b3 25. Rc3 Kd7 26. Be3 Rc8 27. Rxc8 Kxc8 28. Nc1 Nc4 29. Nxb3 Nxe3+ 30. Ke2 Ng2 31. Kf3 Nh4+ 32. Kg3 Ng6 33. h4 Kc7 34. h5 Nf8 35. f5 exf5 36. gxf5 Nh7 37. Kf4 Kc6 38. Nd4+ Kd7 39. f6 b5 40. Kf5 Nf8 41. h6 Nh7 42. e6+ Ke8 43. e7 Kd7 44. Ke5 Ke8 45. Nf5 1-0

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.04.30"]
[Round "2"]
[White "Van der Knijff, Bernhard"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "D85"]
[PlyCount "60"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Rb1 c5 8. Nf3 0-0 9. Be3 Nc6 10. Qd2 Bg4 11. d5 Bxf3 12. gxf3 Ne5 13. Be2 b6 14. f4 Nd7 15. h4 e5 16. f5 Nf6 17. h5 Nxe4 18. Qd3 gxf5 19. h6 Bf6 20. Rg1+ Kh8 21. f3 c4 22. Qc2 Bh4+ 23. Kf1 Ng3+ 24. Rxg3 Bxg3 25. Qxf5 Qh4 26. Rb4 Qh1+ 27. Bg1 Qxh6 28. Rxc4 Rg8 29. Bd3 Qc1+ 30. Kg2 Bf2+ 0-1

[Event "NED-ch U17"]
[Site "Haarlem"]
[Date "2010.04.29"]
[Round "1"]
[White "Knottnerus, Ivo"]
[Black "Van Overdam, Julian"]
[Result "0-1"]
[ECO "C18"]
[BlackElo "2094"]
[PlyCount "52"]
[EventDate "2010.04.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. f4 cxd4 8. Ne2 dxc3 9. Qd4 Ne7 10. Qxc3 Qxc3+ 11. Nxc3 0-0 12. Bd3 Bd7 13. Rb1 Rc8 14. Bd2 Rc7 15. Kf2 Na6 16. g4 Nc5 17. Rhc1 Rac8 18. Ne2 Ne4+ 19. Bxe4 dxe4 20. Nd4 Nd5 21. Re1 Rc4 22. c3 b6 23. Rbc1 Nxc3 24. Bxc3 Rxc3 25. Rxc3 Rxc3 26. Re3 Rc4 0-1

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "7"]
[White "Van Andel, Michiel"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1655"]
[BlackElo "1722"]
[PlyCount "92"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[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. e5 Bf5 4. Bd3 Bxd3 5. Qxd3 e6 6. Nf3 c5 7. c3 Qb6 8. 0-0 Nc6 9. Nbd2 Rc8 10. dxc5 Bxc5 11. Nb3 Be7 12. Be3 Qc7 13. Bd4 Nh6 14. Rfe1 Nf5 15. Rad1 0-0 16. Re2 b6 17. Qb5 Nb8 18. g3 Nd7 19. Nfd2 Nc5 20. Bxc5 bxc5 21. Nf3 Ra8 22. Qa4 Rfb8 23. Qf4 a5 24. Qa4 Bf8 25. Rdd2 Ne7 26. Qh4 Nc8 27. Nc1 Nb6 28. b3 a4 29. Rb2 axb3 30. Nxb3 Ra3 31. Qf4 Na4 32. Rbc2 c4 33. Nbd4 Rxc3 34. Rxc3 Nxc3 35. Rc2 Nb5 36. Nxb5 Rxb5 37. Nd4 Ra5 38. Qd2 Bc5 39. Rb2 Ra8 40. Nb5 Qxe5 41. Kg2 d4 42. Qc2 c3 43. Rb3 f5 44. f3 d3 45. Qxd3 Rxa2+ 46. Kh3 Qe2 0-1

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "6"]
[White "Knottnerus, Ivo"]
[Black "Brons, Dimitry"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "1722"]
[BlackElo "1313"]
[PlyCount "79"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Bxf6 gxf6 9. Na3 b5 10. Nd5 f5 11. Bd3 Be6 12. c3 Bg7 13. Nc2 Ne7 14. Ncb4 0-0 15. Nxe7+ Qxe7 16. exf5 e4 17. fxe6 exd3 18. 0-0 fxe6 19. Qxd3 Be5 20. Nc6 Qh4 21. Nxe5 dxe5 22. Rae1 Rad8 23. Qe3 Rf5 24. Rd1 Rdf8 25. Qb6 Qf6 26. Rd6 Qg5 27. Rd7 Rxf2 28. Qxf2 Rxf2 29. Kxf2 Qf4+ 30. Kg1 Qe3+ 31. Kh1 Qe2 32. Rd8+ Kg7 33. Rdf8 Qxb2 34. R1f7+ Kg6 35. Rf1 Qxa2 36. Rg8+ Kh5 37. g4+ Kh4 38. Rf6 Qb1+ 39. Kg2 Qc2+ 40. Kf3 1/2-1/2

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "4"]
[White "Knottnerus, Ivo"]
[Black "Roelofs, Iris"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1722"]
[BlackElo "1581"]
[PlyCount "43"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Bc4 e6 5. d4 Nxc3 6. bxc3 Be7 7. Qg4 Bf6 8. Ba3 b6 9. Ne2 e5 10. Qf3 c6 11. dxe5 Be6 12. Bxe6 fxe6 13. exf6 Qxf6 14. Qxf6 gxf6 15. Bd6 e5 16. f4 Nd7 17. Ba3 Rg8 18. 0-0 0-0-0 19. Rad1 c5 20. fxe5 fxe5 21. Rf7 Rh8 22. Ng3 1-0

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "5"]
[White "Maris, Ivo"]
[Black "Knottnerus, Ivo"]
[Result "1/2-1/2"]
[ECO "B19"]
[WhiteElo "1884"]
[BlackElo "1722"]
[PlyCount "36"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[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. h4 h6 8. Bc4 e6 9. Qe2 Ngf6 10. Ne5 Nxe5 11. dxe5 Nd5 12. c3 Qc7 13. Bd2 Be7 14. f4 0-0-0 15. 0-0-0 Qb6 16. Bb3 Bc5 17. h5 Bh7 18. Ne4 Bxe4 1/2-1/2

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.04"]
[Round "2"]
[White "Ritterfeld, Sten"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1520"]
[BlackElo "1722"]
[PlyCount "94"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. Bb5 e6 5. d4 cxd4 6. Nxd4 Bd7 7. Nxc6 bxc6 8. Ba4 d5 9. exd5 cxd5 10. Bxd7+ Qxd7 11. 0-0 Be7 12. Bf4 Nf6 13. Qd3 a6 14. Rfe1 Qb7 15. b3 0-0 16. Rad1 Rac8 17. Re3 Nh5 18. Rh3 Rxc3 19. Qxc3 Nxf4 20. Qe3 Nxh3+ 21. Qxh3 Rc8 22. Qd3 Qb5 23. Qxb5 axb5 24. Rd2 Bb4 25. Re2 Ra8 26. c4 dxc4 27. bxc4 bxc4 28. Rb2 Ba3 29. Rc2 Rb8 30. Kf1 Kf8 31. Ke2 Rb2 32. Rxb2 Bxb2 33. a4 Bd4 34. f3 Ke7 35. Kd2 Kd6 36. Kc2 Kc5 37. a5 Kb5 38. a6 Kxa6 39. g4 Kb5 40. h4 Kb4 41. h5 g6 42. hxg6 hxg6 43. f4 Be3 44. f5 gxf5 45. gxf5 exf5 46. Kd1 c3 47. Kc2 f4 0-1

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.03"]
[Round "3"]
[White "Knottnerus, Ivo"]
[Black "Bravo, Fabio"]
[Result "1/2-1/2"]
[ECO "B45"]
[WhiteElo "1722"]
[BlackElo "1876"]
[PlyCount "45"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 Bb4 7. Bg5 Qa5 8. Nxc6 bxc6 9. Bxf6 gxf6 10. Qf3 Ke7 11. 0-0 Bxc3 12. Qxc3 Qxc3 13. bxc3 d5 14. Bd3 Rg8 15. c4 d4 16. c5 e5 17. f4 a5 18. a4 Be6 19. Rab1 Rab8 20. Kf2 Ba2 21. Rxb8 Rxb8 22. Ra1 Rb2 23. Ke1 1/2-1/2

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.03"]
[Round "1"]
[White "Knottnerus, Ivo"]
[Black "Klopstra, Frederieke"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1722"]
[BlackElo "1254"]
[PlyCount "79"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "7"]
[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. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Bc4 0-0 8. 0-0 Ne5 9. Be2 d5 10. f4 Nd7 11. e5 Qb6 12. b4 Bxd4 13. Bxd4 c5 14. bxc5 Nxc5 15. Nd2 Qc6 16. Rb1 a6 17. Bg4 b5 18. Bxc8 Raxc8 19. Qg4 Ne6 20. f5 Nxd4 21. cxd4 Qh6 22. Nb3 Rc2 23. a4 bxa4 24. Nc5 Qe3+ 25. Kh1 a3 26. Nd7 Rfc8 27. Nf6+ Kh8 28. Nh5 Qh6 29. f6 Ng6 30. fxg7+ Kg8 31. Qf3 R2c7 32. Nf6+ Kxg7 33. Qxa3 Qd2 34. Nxd5 Rc2 35. Qf3 Rc1 36. Qxf7+ Kh6 37. Nf6 Nf8 38. Ng8+ Kg5 39. Qf5+ Kh4 40. g3# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.11"]
[Round "13"]
[White "Knottnerus, Ivo"]
[Black "Van Andel, Michiel"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "1388"]
[BlackElo "1241"]
[PlyCount "71"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. Bd2 Bxd2+ 6. Nbxd2 Nf6 7. 0-0 0-0 8. Nb3 Nxe4 9. Nbxd4 Nxd4 10. Nxd4 d6 11. Re1 Nf6 12. Qd3 d5 13. Bb3 c6 14. Rad1 Re8 15. Nf3 Bg4 16. Rxe8+ Qxe8 17. Re1 Qd7 18. Ne5 Qe7 19. Re3 Qd6 20. c4 d4 21. Nxf7 Qb4 22. Qxd4 Re8 23. Rxe8+ Nxe8 24. Nh6+ Kf8 25. h3 Bxh3 26. gxh3 gxh6 27. Qh8+ Kf7 28. Qxh7+ Ng7 29. c5+ Ke8 30. Qg8+ Ke7 31. Qxg7+ Kd8 32. Qf8+ Kd7 33. Qf7+ Kd8 34. Qf6+ Ke8 35. Bf7+ Kd7 36. Be6+ 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "12"]
[White "Evengroen, Bernard"]
[Black "Knottnerus, Ivo"]
[Result "1/2-1/2"]
[ECO "B84"]
[WhiteElo "1336"]
[BlackElo "1388"]
[PlyCount "72"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Be2 Be7 8. 0-0 Bd7 9. Bf3 Qc7 10. Nb3 Bc6 11. a4 Nbd7 12. a5 Nc5 13. e5 Nxb3 14. cxb3 dxe5 15. Bb6 Qd6 16. Qe2 Bxf3 17. Qxf3 0-0 18. Qxb7 Rfb8 19. Qf3 Qb4 20. Ne2 Nd5 21. Rfe1 Nxb6 22. axb6 Qxb6 23. Ng3 Qxb3 24. Qc6 Qb7 25. Qxb7 Rxb7 26. Ra2 Rb5 27. Rea1 g6 28. Kf1 Rab8 29. Rb1 a5 30. Ne4 Bb4 31. Rba1 f5 32. Nc3 Bxc3 33. bxc3 Rb1+ 34. Rxb1 Rxb1+ 35. Ke2 Rc1 36. Kd2 Rf1 1/2-1/2

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "11"]
[White "Knottnerus, Ivo"]
[Black "Edens, Melle"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "1388"]
[BlackElo "1494"]
[PlyCount "62"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ngf3 Be7 8. Qc2 c4 9. Be2 b5 10. a3 Bb7 11. b3 Na5 12. b4 Nc6 13. Bb2 Nb6 14. Bd1 Qc7 15. Nf1 a5 16. Ng3 Kd7 17. Qb1 axb4 18. axb4 Rxa1 19. Qxa1 Ra8 20. Qb1 Nxb4 21. cxb4 Bxb4+ 22. Ke2 Na4 23. Bxa4 Rxa4 24. Rc1 Ba5 25. Nd2 b4 26. Ngf1 Qb6 27. Ba1 Ba6 28. Ne3 c3+ 29. Kd1 cxd2 30. Kxd2 Qb5 31. Re1 b3+ 0-1

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "10"]
[White "Nicolai, Celine"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1281"]
[BlackElo "1388"]
[PlyCount "50"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nf3 d6 4. Bc4 Bg4 5. Be2 Nf6 6. h3 Bh5 7. Ng5 Bxe2 8. Qxe2 h6 9. Nf3 e6 10. d3 Be7 11. Bd2 a6 12. a4 Qc7 13. 0-0 0-0-0 14. Na2 d5 15. e5 Nd7 16. Bf4 g5 17. Bh2 Rdg8 18. Rfe1 h5 19. Nd2 g4 20. hxg4 hxg4 21. Qe3 Bg5 22. Bf4 Bxf4 23. Qxf4 Ndxe5 24. Nc3 Nf3+ 25. Nxf3 Qxf4 0-1

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.09"]
[Round "8"]
[White "Turk, Casper"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "971"]
[BlackElo "1388"]
[PlyCount "72"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. Nf3 d6 4. Nxd4 Nf6 5. Nc3 Bd7 6. Bb5 e6 7. Bf4 e5 8. Bxd7+ Nbxd7 9. 0-0 exf4 10. Qe2 Be7 11. Nd5 Nxd5 12. exd5 0-0 13. Nf5 Ne5 14. Rfe1 Bg5 15. Qe4 Re8 16. Qd4 g6 17. h4 Bf6 18. Nh6+ Kg7 19. Qxf4 Bxh4 20. Rxe5 dxe5 21. Qe3 Bg5 22. Qh3 Bxh6 23. Re1 Qxd5 24. Qg4 Qd2 25. Rf1 e4 26. Kh2 Qf4+ 27. Kh3 Qxg4+ 28. Kxg4 f5+ 29. Kg3 e3 30. fxe3 Rxe3+ 31. Kh2 Re2 32. Kh3 Rae8 33. Rd1 R8e3+ 34. g3 Bf4 35. Kh4 Bxg3+ 36. Kg5 h6# 0-1

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.08"]
[Round "7"]
[White "Knottnerus, Ivo"]
[Black "Katoen, Tom"]
[Result "1-0"]
[ECO "B32"]
[WhiteElo "1388"]
[BlackElo "778"]
[PlyCount "35"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 d6 4. dxc5 dxc5 5. Qxd8+ Nxd8 6. Be3 b6 7. Bb5+ Bd7 8. Bxd7+ Kxd7 9. Nc3 Nf6 10. 0-0-0+ Ke8 11. Nb5 e6 12. Nc7+ Ke7 13. Nxa8 Ke8 14. Nc7+ Ke7 15. Bg5 Nc6 16. e5 Nxe5 17. Nxe5 h6 18. Nc6# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "3"]
[White "De Mon, Gino"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "1207"]
[BlackElo "1388"]
[PlyCount "40"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nf3 Nf6 6. b3 Bc5 7. Bd3 d5 8. exd5 Nxd5 9. Bc4 Be6 10. Bb2 Nf4 11. Qxd8+ Rxd8 12. Bxe6 fxe6 13. Bxe5 Nxe5 14. Nxe5 Bd4 15. Nc6 bxc6 16. c3 Nd3+ 17. Kd2 Bxf2 18. Rf1 0-0 19. Ke2 Bc5 20. Nd2 Nf4+ 0-1

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "2"]
[White "Knottnerus, Ivo"]
[Black "Soeterbroek, Jaimy"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "1388"]
[BlackElo "1409"]
[PlyCount "47"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 f6 4. Bc4 Bb4+ 5. Nc3 Nge7 6. dxe5 fxe5 7. Ng5 d5 8. exd5 Na5 9. Bd3 Nxd5 10. Qh5+ g6 11. Bxg6+ Ke7 12. Nxh7 Kd6 13. Bg5 Qd7 14. 0-0-0 Bxc3 15. Rxd5+ Kxd5 16. Nf6+ Kd6 17. Qxh8 Bxb2+ 18. Kxb2 Qb5+ 19. Kc1 Nc4 20. Ne4+ Kc6 21. Qf6+ Kd7 22. Rd1+ Nd6 23. Rxd6+ cxd6 24. Qxd6# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.06"]
[Round "1"]
[White "Seidenstuecker, Hans Lennart"]
[Black "Knottnerus, Ivo"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "786"]
[BlackElo "1388"]
[PlyCount "41"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Bf5 4. Bg5 h6 5. Bf4 Nd7 6. cxd5 cxd5 7. e3 Rc8 8. Nc3 e6 9. Bb5 Ngf6 10. 0-0 h5 11. Ne5 h4 12. Bg5 Rc7 13. Bxf6 gxf6 14. Bxd7+ Rxd7 15. Nxd7 Qxd7 16. Rc1 Rg8 17. Qa4 Bd6 18. Rfe1 e5 19. Kh1 Ke7 20. Nxd5+ Ke6 21. Qxd7+ 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.19"]
[Round "8"]
[White "Doornenbal, Ruben"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "1514"]
[BlackElo "1295"]
[PlyCount "38"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 g6 4. e5 Bg7 5. Bd3 f6 6. f4 fxe5 7. fxe5 c5 8. dxc5 Bxe5 9. Bb5+ Bd7 10. Bxd7+ Nxd7 11. Qxd5 Bxc3+ 12. bxc3 Ngf6 13. Qd4 Rc8 14. Be3 Rxc5 15. Qb4 Re5 16. Qd4 Nd5 17. Nf3 Nxe3 18. Kf2 Nf5 19. Qa4 Qb6+ 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.19"]
[Round "9"]
[White "Knottnerus, Ivo"]
[Black "Bakker, Jouke"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "1295"]
[BlackElo "1384"]
[PlyCount "50"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 Be7 6. e5 Ng4 7. Bf4 d6 8. Bb5 Bd7 9. exd6 cxd6 10. Re1 0-0 11. Bxc6 Bxc6 12. Nxd4 Nf6 13. Nf5 Nd5 14. Nxe7+ Nxe7 15. Bxd6 Re8 16. Nc3 Nf5 17. Bg3 Rxe1+ 18. Qxe1 Nd4 19. Rd1 Qf6 20. Qd2 Ne6 21. Qe3 h6 22. Be5 Qg6 23. Qg3 Qxc2 24. f4 Qg6 25. Qxg6 fxg6 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.19"]
[Round "7"]
[White "Knottnerus, Ivo"]
[Black "Bijlsma, Nick"]
[Result "0-1"]
[ECO "B95"]
[WhiteElo "1295"]
[BlackElo "1790"]
[PlyCount "48"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bg5 Be7 8. Qd2 Qc7 9. Bb3 Nc6 10. f4 Bd7 11. 0-0-0 0-0-0 12. Rhe1 h6 13. Bxf6 gxf6 14. Re3 Nxd4 15. Qxd4 Bc6 16. Ne2 Kb8 17. Rc3 Qd7 18. Ng3 Rhg8 19. Rd2 Rc8 20. e5 fxe5 21. fxe5 Bg5 22. Qxd6+ Qxd6 23. exd6 Rcd8 24. Rcd3 Bxg2 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.18"]
[Round "5"]
[White "Gieben, Stijn"]
[Black "Knottnerus, Ivo"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "1418"]
[BlackElo "1295"]
[PlyCount "125"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e3 e5 2. d4 e4 3. c4 Nf6 4. Qc2 c6 5. Bd2 d5 6. Nc3 Be6 7. c5 b6 8. b4 Nbd7 9. Ba6 Qc7 10. a4 Nb8 11. Be2 Nbd7 12. f3 Bf5 13. f4 Be7 14. h3 h5 15. Nd1 h4 16. cxb6 axb6 17. b5 c5 18. Nb2 c4 19. Bd1 Nh5 20. Bxh5 Rxh5 21. Ne2 g5 22. Bc3 Nf6 23. Kf2 g4 24. Ke1 Qd7 25. hxg4 Bxg4 26. Nd1 h3 27. gxh3 Rxh3 28. Rxh3 Bxh3 29. Kd2 Ng4 30. Nb2 Nh2 31. Ng1 Nf1+ 32. Kc1 Bg4 33. Qf2 Bh3 34. Kc2 Nxe3+ 35. Qxe3 Bf5 36. Re1 Ba3 37. Ra1 Qd6 38. Ne2 Bb4 39. Ng3 Bd7 40. Rh1 Ke7 41. f5 Ba3 42. Qg5+ Qf6 43. Qxf6+ Kxf6 44. Rh6+ Ke7 45. Rxb6 Bxb2 46. Bxb2 Rxa4 47. f6+ Kd8 48. Rd6 Kc7 49. Rxd5 Rb4 50. Nxe4 Rxb5 51. Rxb5 Bxb5 52. Ng5 Be8 53. Kc3 Kd6 54. Kxc4 Kc7 55. Kc5 Kd8 56. Kd6 Bd7 57. Nxf7+ Ke8 58. Ng5 Bf5 59. d5 Bg6 60. Ke6 Kf8 61. Ba3+ Ke8 62. f7+ Bxf7+ 63. Nxf7 1/2-1/2

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.18"]
[Round "4"]
[White "Knottnerus, Ivo"]
[Black "Minderman, Chiel"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1295"]
[BlackElo "1502"]
[PlyCount "128"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Qf3 Nf6 6. Qxd5 Nxd5 7. Bc4 Nb6 8. Bb5+ Bd7 9. Bxd7+ N8xd7 10. Nf3 Bd6 11. Be3 0-0 12. Nbd2 cxd4 13. Bxd4 Bc5 14. Nb3 Bxd4 15. Nbxd4 Nc5 16. 0-0 Rfd8 17. Rad1 Rd5 18. Rfe1 Rad8 19. Rd2 Nc4 20. Rc2 Nd3 21. Rb1 e5 22. Nf5 Kf8 23. Ng5 R5d7 24. h4 h6 25. Ne4 b6 26. g4 Nf4 27. g5 hxg5 28. Nxg5 f6 29. Ne4 Nd2 30. Nxd2 Rxd2 31. Ne3 Rxc2 32. Nxc2 Rd2 33. Nb4 Nh3+ 34. Kh1 Nxf2+ 35. Kg1 a5 36. Nc6 Rd1+ 37. Rxd1 Nxd1 38. Nb8 Ke8 39. b4 Nxc3 40. bxa5 bxa5 41. Nc6 Nxa2 42. Nxa5 Nb4 43. Nc4 Kf7 44. h5 Nd5 45. Nd6+ Kg8 46. Nf5 Nf4 47. Ng3 Kh7 48. Kf2 Kh6 49. Nf5+ Kxh5 50. Nxg7+ Kg5 51. Ne8 f5 52. Nd6 Kg4 53. Ke3 Nd5+ 54. Kd3 Kf4 55. Nc4 e4+ 56. Ke2 Nc3+ 57. Kf2 Nd5 58. Nb2 e3+ 59. Ke2 Kg3 60. Ke1 f4 61. Nd1 f3 62. Nb2 f2+ 63. Kf1 Kf3 64. Nc4 e2# 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.18"]
[Round "6"]
[White "Verhoog, Rick"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "1559"]
[BlackElo "1295"]
[PlyCount "100"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 g6 4. Nf3 Bg7 5. exd5 cxd5 6. Bd3 Nc6 7. Be3 Bg4 8. Be2 Nf6 9. h3 Bxf3 10. Bxf3 0-0 11. 0-0 e6 12. Rb1 Rc8 13. Qd2 Re8 14. Ne2 e5 15. dxe5 Nxe5 16. Nd4 Nc4 17. Qe2 Ne4 18. Bxe4 Rxe4 19. c3 Qe7 20. Rfe1 Re8 21. Nc2 Bh6 22. Qf3 Bxe3 23. Nxe3 Nxe3 24. fxe3 Rxe3 25. Rxe3 Qxe3+ 26. Qxe3 Rxe3 27. Kf2 Re4 28. Rd1 Re5 29. Rd3 f5 30. b3 Kf7 31. Rd4 Ke6 32. g3 Re4 33. a3 Rxd4 34. cxd4 Kd6 35. Kf3 Ke6 36. b4 a6 37. a4 b6 38. Kf4 Kf6 39. b5 a5 40. Ke3 g5 41. Kf3 h6 42. Ke3 Kg6 43. Kf3 Kh5 44. Kg2 f4 45. Kf3 fxg3 46. Kxg3 Kg6 47. Kg4 h5+ 48. Kg3 Kf5 49. h4 gxh4+ 50. Kxh4 Ke4 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.17"]
[Round "3"]
[White "Edens, Melle"]
[Black "Knottnerus, Ivo"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1534"]
[BlackElo "1295"]
[PlyCount "26"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6 5. d4 d5 6. Nc3 Bg4 7. Be3 Nf6 8. exd5 cxd5 9. dxc5 e5 10. h3 Bxf3 11. Qxf3 d4 12. 0-0-0 Qc8 13. Qe4 Nxe4 0-1

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.17"]
[Round "1"]
[White "Knottnerus, Ivo"]
[Black "Goedegebuur, Richard"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1295"]
[BlackElo "1556"]
[PlyCount "51"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 e6 6. Bc4 d6 7. Bxd5 exd5 8. Nc3 dxe5 9. dxe5 Bb4 10. Nge2 Nc6 11. a3 Bxc3+ 12. Nxc3 Be6 13. Bf4 Qa5 14. 0-0 0-0 15. b4 Qd8 16. Nb5 Qd7 17. Qe2 f6 18. Rfe1 Bf5 19. e6 Qe7 20. Bd6 Nd4 21. Nxd4 Qxd6 22. Nxf5 Qc7 23. Rac1 Qb6 24. Ne7+ Kh8 25. Nxd5 Qd6 26. Red1 1-0

[Event "NED-ch U13"]
[Site "Rijswijk"]
[Date "2007.05.17"]
[Round "2"]
[White "Knottnerus, Ivo"]
[Black "Obels, Pepijn"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1295"]
[BlackElo "1674"]
[PlyCount "78"]
[EventDate "2007.05.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. Bg5 d6 6. Nxd4 Be7 7. 0-0 0-0 8. Nc3 Ne5 9. Bb3 a6 10. f4 Ng6 11. h3 c5 12. Nf5 Qb6 13. Bxf6 Bxf6 14. Nd5 Qa7 15. Nxf6+ gxf6 16. Nh6+ Kg7 17. Nf5+ Kh8 18. Kh2 Be6 19. Qg4 c4 20. h4 cxb3 21. h5 b5 22. cxb3 Rg8 23. Qg3 Bxf5 24. exf5 Ne7 25. Qh4 Qd4 26. g4 Qxb2+ 27. Kh1 Nxf5 28. Qh3 Ne7 29. Rae1 Nd5 30. Qh4 Rae8 31. Rb1 Qc2 32. Rbd1 Qe4+ 33. Kg1 Rxg4+ 34. Qxg4 Rg8 35. Qxg8+ Kxg8 36. Rfe1 Qf3 37. h6 Ne3 38. Rxe3 Qxe3+ 39. Kg2 Qe2+ 0-1

[Event "NED-ch U11"]
[Site "Waalwijk"]
[Date "2005.03.25"]
[Round "1"]
[White "Knottnerus, Ivo"]
[Black "Bijlsma, Nick"]
[Result "0-1"]
[ECO "D93"]
[PlyCount "44"]
[EventDate "2005.03.25"]
[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 Nf6 2. c4 g6 3. Bf4 Bg7 4. Nf3 d5 5. Nc3 Bg4 6. e3 0-0 7. Be5 dxc4 8. Bxc4 Nbd7 9. Bxf6 Nxf6 10. h3 Bd7 11. 0-0 Ne8 12. Re1 Nd6 13. Qd3 Re8 14. Re2 e5 15. d5 e4 16. Nxe4 Rxe4 17. Rc1 Bf5 18. Qb3 Nxc4 19. Rxc4 Qxd5 20. Nd2 Rxc4 21. Nxc4 Bd3 22. Rd2 Bxc4 0-1

