[Event "Bussum op"]
[Site "Bussum"]
[Date "2009.05.29"]
[Round "1"]
[White "Keizer, Theodoor"]
[Black "Pliester, Leon"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "2059"]
[BlackElo "2374"]
[PlyCount "67"]
[EventDate "2009.05.29"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 130 Extra"]
[Source "ChessBase"]
[SourceDate "2009.07.02"]
[SourceVersion "2"]
[SourceVersionDate "2009.07.15"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. c4 Nf6 4. Nc3 Be7 5. e3 0-0 6. Qc2 b6 7. Bd3 Bb7 8. cxd5 exd5 9. 0-0 c5 10. dxc5 bxc5 11. b3 Nc6 12. Rd1 Nb4 13. Qe2 Nxd3 14. Qxd3 Qb6 15. Bb2 Rfd8 16. Qf5 Qe6 17. Qxe6 fxe6 18. Rac1 Rac8 19. Ne2 Rc6 20. Rd2 Ba6 21. Nf4 Ne4 22. Rdc2 Rb6 23. h4 Bf6 24. Ne5 Bxh4 25. b4 Rxb4 26. Nc6 Rb6 27. Nxd8 Bxd8 28. f3 Ng3 29. Bc3 Bg5 30. Kf2 Nf5 31. Be5 c4 32. Bc3 d4 33. Bxd4 Nxd4 34. exd4 0-1

[Event "Arnhem op"]
[Site "Arnhem"]
[Date "2007.08.31"]
[Round "1"]
[White "Keizer, Theodoor"]
[Black "Rijnaarts, Sjef"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "2042"]
[BlackElo "2292"]
[PlyCount "48"]
[EventDate "2007.08.31"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c6 5. cxd5 exd5 6. Bg5 Be7 7. e3 0-0 8. Be2 Nbd7 9. 0-0 Ne4 10. Bxe7 Qxe7 11. Rc1 Ndf6 12. Ne5 Re8 13. a3 Bf5 14. b4 Nxc3 15. Rxc3 a6 16. f3 Nd7 17. Nxd7 Bxd7 18. f4 a5 19. Qb3 axb4 20. axb4 Ra7 21. Bf3 Rea8 22. h3 Ra2 23. Rfc1 Qh4 24. R3c2 R2a3 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.29"]
[Round "8"]
[White "Karsdorp, Nico"]
[Black "Keizer, Theodoor"]
[Result "1/2-1/2"]
[ECO "E90"]
[WhiteElo "1941"]
[PlyCount "69"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. Nf3 g6 2. c4 Bg7 3. d4 c6 4. e4 d6 5. Nc3 Nd7 6. Be3 Ngf6 7. h3 0-0 8. Qd2 e5 9. Be2 Re8 10. d5 cxd5 11. cxd5 Nc5 12. Qc2 Qa5 13. Nd2 Bd7 14. a3 Qc7 15. Rc1 Rec8 16. 0-0 a5 17. Qb1 Qd8 18. Nb5 Ne8 19. Nxd6 Nxd6 20. Rxc5 f5 21. f3 f4 22. Bf2 Qg5 23. Rxc8+ Rxc8 24. Kh1 Bf6 25. Rc1 Rf8 26. Rc7 Rf7 27. Qc1 Bd8 28. Rc2 b5 29. Nb3 Qf6 30. Nc5 Bc8 31. Qg1 h5 32. b4 a4 33. Nd3 Bd7 34. Nc5 Bc8 35. Bd3 1/2-1/2

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.27"]
[Round "6"]
[White "Costello, Colin"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "A26"]
[WhiteElo "2067"]
[PlyCount "65"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. c4 f5 2. g3 Nf6 3. Bg2 g6 4. Nc3 Bg7 5. Nf3 0-0 6. 0-0 d6 7. d3 e5 8. Rb1 a5 9. a3 Nc6 10. b4 axb4 11. axb4 h6 12. b5 Ne7 13. Bb2 g5 14. Ra1 Rb8 15. Ra7 Qe8 16. Qb3 Kh8 17. Nd5 Nexd5 18. cxd5 Nd7 19. Rc1 Nc5 20. Qb4 b6 21. Rxc7 Rf7 22. Rxf7 Qxf7 23. d4 g4 24. Nd2 exd4 25. Bxd4 Bb7 26. e4 Ra8 27. Qc3 Bxd4 28. Qxd4+ Kg8 29. exf5 Qxf5 30. Ne4 Ra4 31. Nxd6 Qg5 32. Qe3 Qxe3 33. fxe3 1-0

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.24"]
[Round "4"]
[White "Keizer, Theodoor"]
[Black "Hartoch, Robert G"]
[Result "0-1"]
[ECO "A21"]
[BlackElo "2300"]
[PlyCount "82"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. Nf3 g6 2. g3 Bg7 3. Bg2 e5 4. d3 d6 5. c4 f5 6. Nc3 Nf6 7. c5 Nc6 8. cxd6 cxd6 9. Bg5 Be6 10. 0-0 0-0 11. Qd2 d5 12. b4 e4 13. Ne1 Ne5 14. Nc2 Nf7 15. Bxf6 Qxf6 16. d4 Nd6 17. e3 Rfc8 18. Na3 Bf8 19. Rfc1 g5 20. Ncb5 a6 21. Nc7 Rab8 22. Nxe6 Qxe6 23. Rxc8 Rxc8 24. Rc1 b5 25. Bf1 Nc4 26. Bxc4 bxc4 27. Nb1 Bd6 28. a3 f4 29. Nc3 f3 30. Qe1 h5 31. Qf1 h4 32. Rc2 Kf7 33. Rb2 Rb8 34. Ra2 Qf5 35. Rb2 a5 36. Qb1 axb4 37. axb4 Ke6 38. b5 Qg4 39. Qf1 hxg3 40. fxg3 Bxg3 41. h3 f2+ 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.23"]
[Round "3"]
[White "Burggraaf, Jan Theodoor"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B09"]
[PlyCount "73"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 d6 3. f4 Nf6 4. Nc3 Bg7 5. Nf3 Bg4 6. h3 Bxf3 7. Qxf3 Nc6 8. Bb5 0-0 9. Bxc6 bxc6 10. 0-0 Nd7 11. Be3 Rb8 12. Nd1 c5 13. dxc5 Nxc5 14. Bxc5 dxc5 15. c3 Qd7 16. Rf2 Qa4 17. Ne3 Rb7 18. e5 Rfb8 19. f5 Rxb2 20. Rxb2 Rxb2 21. Qa8+ Bf8 22. Nd5 Qh4 23. Rf1 Qg5 24. Nxc7 gxf5 25. e6 Qe3+ 26. Kh1 fxe6 27. Qc8 Re2 28. Rf3 Qe5 29. Rf1 Qe4 30. Rg1 Re3 31. Kh2 Re1 32. Nb5 Kf7 33. Qc7 Qd5 34. c4 Qd3 35. Qxc5 Bg7 36. Qc6 Be5+ 37. Kh1 0-1

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.22"]
[Round "2"]
[White "Keizer, Theodoor"]
[Black "Van Ketel, Raoul"]
[Result "1/2-1/2"]
[ECO "A08"]
[BlackElo "2226"]
[PlyCount "109"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. g3 d5 2. Nf3 Nf6 3. d3 c5 4. Bg2 Nc6 5. 0-0 Bg4 6. h3 Bxf3 7. Bxf3 Qd7 8. Bg2 g6 9. Nd2 Bg7 10. c3 0-0 11. Nf3 Rac8 12. Be3 b6 13. Qa4 d4 14. Bd2 dxc3 15. bxc3 Nd4 16. Qd1 Nxf3+ 17. Bxf3 Qxh3 18. Qa4 Qd7 19. Qxd7 Nxd7 20. a4 Ne5 21. Bg2 Nc6 22. Ra2 c4 23. d4 Na5 24. Bc1 Rfd8 25. f4 e6 26. e4 h5 27. f5 e5 28. fxg6 fxg6 29. d5 Rf8 30. Raf2 Nb3 31. Bg5 Rxf2 32. Rxf2 Rf8 33. Bh3 Nc5 34. Be6+ Kh7 35. Be7 Nxe6 36. dxe6 Re8 37. Rf7 Kg8 38. Ba3 Rxe6 39. Rxa7 Rc6 40. Rb7 Bh6 41. Bb4 Rf6 42. Rb8+ Kh7 43. Rb7+ Bg7 44. Kg2 Kh6 45. Be7 Rc6 46. Bd8 Bf8 47. Bxb6 Bc5 48. Rc7 Rxb6 49. Rxc5 Kg5 50. Rxe5+ Kg4 51. Rb5 Rd6 52. Rd5 Rb6 53. Rb5 Rd6 54. Rd5 Rb6 55. Rb5 1/2-1/2

[Event "Groningen op-A"]
[Site "Groningen"]
[Date "2004.12.21"]
[Round "1"]
[White "Groenewold, Jan Joris"]
[Black "Keizer, Theodoor"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "2159"]
[PlyCount "43"]
[EventDate "2004.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 104 Extra"]
[Source "ChessBase"]
[SourceDate "2005.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.03.01"]
[SourceQuality "1"]

1. c4 g6 2. Nc3 Bg7 3. e4 c5 4. Nf3 Nc6 5. Be2 d6 6. h3 e6 7. 0-0 Nge7 8. a3 0-0 9. Rb1 d5 10. d3 h6 11. Qc2 b6 12. Re1 Nd4 13. Nxd4 cxd4 14. Na2 dxe4 15. dxe4 Bb7 16. Nb4 a5 17. Nd3 Bxe4 18. f3 Bf5 19. g4 Bxd3 20. Bxd3 Qc7 21. f4 Rac8 22. Qf2 1/2-1/2

[Event "Vlissingen HZ op 07th"]
[Site "Vlissingen"]
[Date "2003.08.07"]
[Round "7"]
[White "Coene, Igor"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "65"]
[EventDate "2003.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. g3 Bg7 5. Bg2 Nbd7 6. Nge2 e5 7. 0-0 0-0 8. f4 c6 9. Kh1 b5 10. dxe5 dxe5 11. f5 b4 12. Na4 Qe7 13. Qd3 a5 14. fxg6 hxg6 15. Bg5 Ba6 16. Qf3 Qe6 17. Rfd1 Qc4 18. Rd2 Nh7 19. Be3 f5 20. exf5 e4 21. Qxe4 Qxe4 22. Bxe4 Rae8 23. fxg6 Nhf6 24. Bd3 Bxd3 25. Rxd3 Ng4 26. Rxd7 Rxe3 27. Nf4 Be5 28. Rf1 Re2 29. h3 Rh2+ 30. Kg1 Bxf4 31. Rxf4 Re8 32. hxg4 Ree2 33. g7 1-0

[Event "Vlissingen HZ op 07th"]
[Site "Vlissingen"]
[Date "2003.08.02"]
[Round "1"]
[White "Keizer, Theodoor"]
[Black "Tiggelman, Rene"]
[Result "0-1"]
[ECO "D27"]
[BlackElo "2200"]
[PlyCount "90"]
[EventDate "2003.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 095 Extra"]
[Source "ChessBase"]
[SourceDate "2003.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2003.09.04"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 a6 6. a4 c5 7. 0-0 Nc6 8. Nc3 Qc7 9. Qe2 Bd6 10. Rd1 0-0 11. h3 b6 12. e4 Nxd4 13. Nxd4 cxd4 14. Rxd4 Be5 15. Rd1 Bb7 16. Bd3 Nd7 17. Be3 Nc5 18. Ra3 Rfd8 19. f3 Rd7 20. Na2 h6 21. b4 Nxd3 22. Raxd3 Rad8 23. Rxd7 Rxd7 24. Rxd7 Qxd7 25. b5 axb5 26. axb5 Bc7 27. Nc3 Qd6 28. f4 Qb4 29. Qd3 Qb3 30. Bd2 Qa3 31. Qd7 Qc5+ 32. Kh1 g5 33. Ne2 Bxe4 34. Qe8+ Qf8 35. Qxf8+ Kxf8 36. fxg5 hxg5 37. Bxg5 Be5 38. Be3 Bd3 39. Nc1 Bxb5 40. Bxb6 Bc4 41. Be3 Bg3 42. Bg5 Kg7 43. Kg1 Kg6 44. Be3 Kh5 45. h4 Kxh4 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.08"]
[Round "2.2"]
[White "Jellema, Yme Jan"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "1914"]
[BlackElo "1769"]
[PlyCount "83"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. e4 g6 2. d4 d6 3. Bc4 Nf6 4. f3 c6 5. c3 Bg7 6. Be3 0-0 7. Nd2 Nbd7 8. Ne2 e5 9. 0-0 a5 10. a4 Kh8 11. Qb3 Qe7 12. Bg5 h6 13. Bh4 g5 14. Bf2 Nh5 15. Ng3 Nxg3 16. hxg3 Nf6 17. d5 g4 18. Be3 Nh5 19. Kf2 f5 20. Rh1 Nxg3 21. Kxg3 f4+ 22. Kf2 fxe3+ 23. Kxe3 Qg5+ 24. Kd3 h5 25. Rad1 Bh6 26. Qb6 Bd7 27. Qc7 Rfd8 28. dxc6 bxc6 29. Bf7 h4 30. Nc4 Rac8 31. Qxa5 d5 32. Nd6 Ra8 33. Qc7 dxe4+ 34. Nxe4 Bf5+ 35. Kc2 Rd2+ 36. Kb3 Bxe4 37. fxe4 Rad8 38. Rxd2 Rxd2 39. Qxc6 Rd8 40. Qc7 Bg7 41. a5 Rd2 42. a6 1-0

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.08"]
[Round "2.3"]
[White "Jellema, Yme Jan"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1914"]
[BlackElo "1769"]
[PlyCount "110"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. e4 g6 2. d4 d6 3. Bc4 Nf6 4. f3 c6 5. c3 Bg7 6. Be3 b5 7. Bb3 a5 8. Nd2 0-0 9. Ne2 a4 10. Bc2 e5 11. 0-0 Nbd7 12. c4 Ba6 13. b3 Qc7 14. Rf2 exd4 15. Nxd4 Ne5 16. cxb5 cxb5 17. Rc1 Rac8 18. h3 Nd3 19. Bxd3 Qxc1 20. Qxc1 Rxc1+ 21. Nf1 Rc3 22. Rd2 Ra8 23. Bxb5 axb3 24. axb3 Bxb5 25. Nxb5 Rxb3 26. Nxd6 Bf8 27. Bg5 Ne8 28. e5 h6 29. Bh4 g5 30. Bg3 Nxd6 31. exd6 Rd8 32. f4 Rxd6 33. Ra2 Rdd3 34. Kh2 Bd6 35. Ra4 Rxg3 36. Nxg3 Bxf4 37. Rxf4 gxf4 38. Nf5 Kh7 39. Nh4 Rb2 40. Kg1 Kg7 41. Nf5+ Kg6 42. Nh4+ Kf6 43. Nf3 Kf5 44. Kh2 Ke4 45. Nh4 Rb3 46. Kg1 f3 47. g4 Rb2 48. Nf5 Rb1+ 49. Kf2 Rb2+ 50. Kf1 Rh2 51. Nxh6 Rxh3 52. Nf5 Kf4 53. Nd6 Kxg4 54. Nxf7 Kg3 55. Ke1 Rh1+ 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.08"]
[Round "2.4"]
[White "Keizer, Theodoor"]
[Black "Jellema, Yme Jan"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "1769"]
[BlackElo "1914"]
[PlyCount "45"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. 0-0 Bg4 5. h3 Bh5 6. d3 Nf6 7. Nbd2 e5 8. e4 d4 9. a4 Bd6 10. Nc4 0-0 11. g4 Bg6 12. Nh4 Bc7 13. Nf5 a6 14. h4 b5 15. Nd2 Bxf5 16. exf5 Nd5 17. Bxd5 Qxd5 18. Ne4 c4 19. f6 g6 20. Qd2 Nd8 21. Qh6 Ne6 22. Ng5 Qd7 23. Qxh7# 1-0

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.01"]
[Round "1.4"]
[White "Keizer, Theodoor"]
[Black "Sparenberg, Erik"]
[Result "0-1"]
[ECO "A60"]
[WhiteElo "1769"]
[BlackElo "1766"]
[PlyCount "72"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. g3 g6 7. Bg2 Bg7 8. e4 Nbd7 9. Nge2 0-0 10. 0-0 a6 11. a4 Re8 12. Bf4 Ne5 13. Bxe5 Rxe5 14. f4 Re8 15. Qd2 Bg4 16. Rae1 Qd7 17. Nc1 Re7 18. e5 Ne8 19. e6 fxe6 20. h3 Bf5 21. g4 Bxc3 22. bxc3 Nf6 23. gxf5 exf5 24. Rxe7 Qxe7 25. Re1 Ne4 26. Qe3 Re8 27. Bxe4 Qd7 28. Qf3 Qxa4 29. Kh2 Rxe4 30. Rxe4 Qxe4 31. Qxe4 fxe4 32. Kg3 Kf7 33. Kf2 Kf6 34. Ke3 b5 35. Kxe4 a5 36. c4 b4 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.01"]
[Round "1.2"]
[White "Sparenberg, Erik"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "1766"]
[BlackElo "1769"]
[PlyCount "57"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 d6 4. Bg2 Bg7 5. b4 0-0 6. a4 e5 7. Rb1 a5 8. b5 Nbd7 9. d3 Rb8 10. Nf3 b6 11. Bg5 h6 12. Bd2 Ne8 13. Qc1 Kh7 14. Nd5 Nc5 15. Qc2 f5 16. Bc3 Ne6 17. e3 Nf6 18. Nxf6+ Bxf6 19. Nd2 Qe7 20. Rd1 g5 21. Nb3 Bd7 22. d4 e4 23. 0-0 g4 24. Bxe4 fxe4 25. Qxe4+ Kh8 26. f4 gxf3 27. Rxf3 Ng5 28. Qxe7 Nxf3+ 29. Kf2 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.01"]
[Round "1.3"]
[White "Sparenberg, Erik"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1766"]
[BlackElo "1769"]
[PlyCount "82"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bd3 Nf6 5. 0-0 Bg4 6. h3 Bxf3 7. Qxf3 e5 8. dxe5 dxe5 9. Nc3 c6 10. Be3 Nbd7 11. Qe2 0-0 12. a4 a5 13. Rad1 Qe7 14. f4 Nh5 15. Qf2 exf4 16. Bxf4 Nxf4 17. Qxf4 Be5 18. Qf2 Nf6 19. Qf3 Rad8 20. Ne2 Nh5 21. b3 Rd6 22. Rf2 Qg5 23. g4 Rf6 24. Qg2 Nf4 25. Nxf4 Bxf4 26. Rf3 Rd8 27. Rdf1 Qe5 28. Qf2 g5 29. Kg2 Kg7 30. h4 h6 31. Kh3 Rdd6 32. h5 c5 33. Qe2 Rd4 34. c3 Rd8 35. Rd1 Rfd6 36. Qc2 b6 37. Rff1 R8d7 38. Be2 Bh2 39. Rf3 Rxd1 40. Bxd1 Bf4 41. Rf1 Rd2 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.12.01"]
[Round "1.5"]
[White "Sparenberg, Erik"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "C26"]
[WhiteElo "1766"]
[BlackElo "1769"]
[PlyCount "56"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 Nf6 3. g3 e5 4. Bg2 Be7 5. d3 0-0 6. Nf3 Bg4 7. h3 Bh5 8. Be3 Nbd7 9. g4 Bg6 10. Nh4 c6 11. Nf5 d5 12. Nxe7+ Qxe7 13. exd5 cxd5 14. Nxd5 Nxd5 15. Bxd5 Qd8 16. h4 Qa5+ 17. Ke2 Qxd5 18. h5 f5 19. hxg6 fxg4 20. gxh7+ Kh8 21. Kd2 Rf3 22. Qe2 Nf6 23. Bg5 Rxf2 24. Bxf6 Rxe2+ 25. Kxe2 Qf3+ 26. Kd2 Qxf6 27. Raf1 Qe7 28. c3 Rf8 0-1

[Event "NED-chB sf"]
[Site "Leeuwarden"]
[Date "2002.11.30"]
[Round "1.1"]
[White "Keizer, Theodoor"]
[Black "Sparenberg, Erik"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "1769"]
[BlackElo "1766"]
[PlyCount "64"]
[EventDate "2002.11.30"]
[EventType "k.o."]
[EventRounds "3"]
[EventCountry "NED"]
[SourceTitle "CBM 091 Extra"]
[Source "ChessBase"]
[SourceDate "2003.01.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.01.09"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Qd2 Nc6 9. d5 Qa5 10. Rc1 Ne5 11. Be2 h5 12. h3 b6 13. f4 Nd7 14. e5 Bb7 15. Nf3 Rd8 16. 0-0 b5 17. Ng5 Nb6 18. d6 exd6 19. e6 f5 20. Nf7 Ke7 21. Rfd1 Bd5 22. Rc2 Kxe6 23. Nxh8 Bxh8 24. g4 Be4 25. Rb2 Bxc3 26. Qc1 b4 27. Kh2 hxg4 28. hxg4 Qa3 29. Rc2 Qa4 30. Rxc3 bxc3 31. Qxc3 Nd5 32. Rxd5 Kxd5 0-1

[Event "Groningen Harmonie op-B"]
[Site "Groningen"]
[Date "2002.??.??"]
[Round "1.7"]
[White "Hielkema, Henk"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1576"]
[BlackElo "1769"]
[PlyCount "52"]
[EventDate "2002.12.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 Nbd7 7. 0-0 e5 8. d5 a5 9. a4 Nc5 10. Qc2 Nh5 11. Be3 b6 12. Bxc5 bxc5 13. Nd2 Nf4 14. Bf3 g5 15. g3 Nh3+ 16. Kh1 f5 17. exf5 Rxf5 18. Nce4 Qf8 19. Kg2 Rf7 20. Bh5 Re7 21. Qd1 Bd7 22. Bg4 h5 23. Bxd7 Rxd7 24. Kxh3 g4+ 25. Kg2 Bh6 26. f3 Qg7 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "8"]
[White "Ammerlaan, Stefan"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B07"]
[PlyCount "51"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d6 3. d4 g6 4. Be2 Bg7 5. g4 h6 6. Be3 Nc6 7. f4 e5 8. fxe5 dxe5 9. d5 Nb4 10. a3 Nxg4 11. Bxg4 Bxg4 12. Qd2 Na6 13. Nge2 Bf6 14. 0-0-0 Bg5 15. h4 Bxe3 16. Qxe3 Qe7 17. Nb5 0-0 18. Rdg1 Bxe2 19. Qxe2 Kh7 20. h5 g5 21. Rf1 c6 22. Nc3 Nc7 23. Rf5 cxd5 24. exd5 f6 25. Qd3 Kg7 26. d6 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "3"]
[White "Crefcoeur, Remco"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "D13"]
[PlyCount "50"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 Qxd5 5. Nc3 Qa5 6. Qc2 Bf5 7. Qb3 Qc7 8. Bg5 Nbd7 9. e3 e6 10. Rd1 Bd6 11. Be2 0-0 12. 0-0 Ne4 13. Nxe4 Bxe4 14. h3 h6 15. Bh4 g5 16. Bg3 Bxg3 17. fxg3 Qxg3 18. Qxb7 Nf6 19. Ne1 Qxe3+ 20. Rf2 Rab8 21. Qxa7 Rxb2 22. Kf1 Nh5 23. Nd3 Ng3+ 24. Ke1 Qxe2+ 25. Rxe2 Rxe2# 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "2"]
[White "Keizer, Theodoor"]
[Black "De Bruijn, Thijs"]
[Result "0-1"]
[ECO "A37"]
[PlyCount "70"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 c5 2. c4 g6 3. Nc3 Bg7 4. g3 Nc6 5. Bg2 d6 6. a3 Bf5 7. d3 Qd7 8. h3 Nf6 9. e4 Be6 10. Be3 0-0 11. Rb1 Ne8 12. Nd5 f5 13. Ng5 Nd4 14. Bxd4 Bxd4 15. Nf4 Ng7 16. 0-0 Be5 17. exf5 Bxf5 18. Nd5 Rae8 19. Kh2 Ne6 20. Nf3 Nd4 21. Nxe5 dxe5 22. b4 cxb4 23. axb4 b5 24. c5 Bxh3 25. Nxe7+ Rxe7 26. Bxh3 Qc7 27. Bg2 Rf5 28. Be4 Rh5+ 29. Kg2 Rf7 30. Bd5 Qd7 31. Bxf7+ Kxf7 32. Rh1 Qd5+ 33. f3 Qa2+ 34. Kg1 Ne2+ 35. Qxe2 Rxh1+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "5"]
[White "Keizer, Theodoor"]
[Black "Heltzel, Joost"]
[Result "0-1"]
[ECO "A11"]
[PlyCount "64"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. Bg2 Bg4 4. c4 e6 5. 0-0 Nbd7 6. cxd5 exd5 7. Nc3 c6 8. Qc2 Bd6 9. d3 0-0 10. Nh4 d4 11. Ne4 Be7 12. h3 Be6 13. Nf3 c5 14. Nfd2 Nd5 15. Nb3 Rc8 16. h4 h6 17. Ned2 f5 18. Nf3 Bd6 19. Nbd2 Bb8 20. Bh3 Qe7 21. Re1 N7f6 22. Nf1 f4 23. Bxe6+ Qxe6 24. e4 dxe3 25. fxe3 fxg3 26. e4 Nb4 27. Qe2 Nxa2 28. Bd2 Nb4 29. e5 Nfd5 30. Nxg3 Nc2 31. Ra4 Nxe1 32. Nxe1 Qxe5 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "9"]
[White "Keizer, Theodoor"]
[Black "Holland, Remco"]
[Result "0-1"]
[ECO "D04"]
[PlyCount "66"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c3 Bf5 4. Nbd2 e6 5. e3 Bd6 6. Be2 Nbd7 7. 0-0 0-0 8. Ne1 c5 9. f4 Ne4 10. Nxe4 Bxe4 11. Nf3 c4 12. b3 b5 13. a4 cxb3 14. axb5 Bc2 15. Qe1 Nb6 16. Ne5 f6 17. Nc6 Qc7 18. Ra6 Nc4 19. Bxc4 dxc4 20. e4 Qb7 21. e5 Qxb5 22. Rxa7 Qxc6 23. Rxa8 Rxa8 24. exd6 Qxd6 25. Bb2 Qd5 26. Rf2 Ra2 27. Qc1 Qe4 28. Rf1 Bd3 29. Re1 Qf5 30. Qd2 Kf7 31. Qc1 Qg4 32. Qd2 Bg6 33. Qc1 Qf5 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "4"]
[White "Keizer, Theodoor"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "86"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. a3 c5 2. Nf3 d6 3. g3 Nf6 4. Bg2 Nc6 5. 0-0 g6 6. c4 Bg7 7. Nc3 0-0 8. Rb1 a5 9. h3 Be6 10. d3 h6 11. e4 Kh7 12. Kh2 Rb8 13. Ne1 Bd7 14. f4 e5 15. Nf3 Ng8 16. Nd5 Be6 17. f5 Bxd5 18. cxd5 Nd4 19. Nxd4 exd4 20. b4 axb4 21. axb4 b6 22. Ra1 Ra8 23. Bd2 Be5 24. Qg4 Nf6 25. fxg6+ fxg6 26. Qe6 Nh5 27. Rf7+ Ng7 28. Raf1 Rxf7 29. Rxf7 cxb4 30. Bxb4 Qg5 31. Qg4 Qc1 32. Qd7 Ra1 33. Rf1 Qb2 34. Rxa1 Qxa1 35. Bxd6 Bxd6 36. Qxd6 Qc3 37. e5 Qxd3 38. Qxb6 Nf5 39. Qc7+ Kg8 40. e6 Qe2 41. d6 Nh4 42. Qf7+ Kh8 43. Qf1 Nxg2 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "7"]
[White "Keizer, Theodoor"]
[Black "Weijers, Ralf"]
[Result "1-0"]
[ECO "A49"]
[PlyCount "61"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 d6 5. 0-0 0-0 6. Re1 Nbd7 7. e4 e5 8. c3 Nh5 9. Nh4 Nb6 10. Bf3 Nf6 11. Na3 Ne8 12. Bg2 f5 13. dxe5 Bxe5 14. exf5 gxf5 15. Rxe5 Ng7 16. Re1 Ne6 17. Nc2 f4 18. Nd4 Ng7 19. Nhf3 fxg3 20. hxg3 Qf6 21. Bg5 Qg6 22. Qc2 Qh5 23. Bf4 Nd7 24. Ng5 Nc5 25. b4 Nd7 26. Bf3 Qg6 27. Be4 Qh5 28. Bf3 Qg6 29. Be4 Qh5 30. Bxh7+ Kh8 31. Bg6 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "6"]
[White "Kranenburg, Leo"]
[Black "Keizer, Theodoor"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "81"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 Nc6 6. 0-0 e6 7. c4 Nde7 8. exd6 Qxd6 9. Nc3 Bxf3 10. Bxf3 Qxd4 11. Qxd4 Nxd4 12. Bxb7 Rb8 13. Be4 f5 14. Bb1 Nec6 15. Re1 Kf7 16. b3 Be7 17. Bb2 Rhd8 18. Kf1 Bf6 19. Ne2 Nxb3 20. Bxf6 Nd2+ 21. Kg1 Kxf6 22. Bc2 Rb2 23. Ba4 Ne5 24. Nf4 Ndxc4 25. Bb3 g5 26. Nxe6 Kxe6 27. Bxc4+ Kf6 28. Rac1 Rdd2 29. Bf1 Rxf2 30. Rc5 Ng6 31. Rxc7 Rxa2 32. Rc6+ Kg7 33. Rd1 Rfd2 34. Rxd2 Rxd2 35. Rc7+ Kf6 36. Rxa7 h5 37. Ra6+ Kg7 38. Ra5 Kf6 39. Ra6+ Kg7 40. Ra5 Kf6 41. Ra6+ 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "1"]
[White "Van Beek, Alexander"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B05"]
[WhiteElo "2262"]
[PlyCount "55"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Nc6 7. c4 Nb6 8. exd6 cxd6 9. d5 exd5 10. cxd5 Bxf3 11. Bxf3 Ne5 12. Be2 Be7 13. Nc3 0-0 14. Be3 f5 15. f4 Nec4 16. Bd4 Bf6 17. Rb1 Re8 18. Rf3 Rc8 19. Qd3 Nxd5 20. Nxd5 Bxd4+ 21. Qxd4 Rxe2 22. Rg3 Qf8 23. Rc1 Nb6 24. Rxc8 Nxc8 25. Qc4 Rxb2 26. Ne7+ Kh8 27. Ng6+ hxg6 28. Rh3# 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "Keizer, Theodoor"]
[Black "Crefcoeur, Remco"]
[Result "1-0"]
[ECO "D13"]
[PlyCount "59"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 c5 3. c3 cxd4 4. cxd4 Nc6 5. Nc3 d5 6. Ne5 Ng4 7. Nxc6 bxc6 8. f3 Nf6 9. e4 e6 10. Bg5 Be7 11. Be2 0-0 12. 0-0 a6 13. e5 Nd7 14. Bxe7 Qxe7 15. f4 c5 16. Kh1 c4 17. Rf3 Nb8 18. Rh3 Nc6 19. Bf1 f6 20. Qd2 fxe5 21. fxe5 Qf7 22. Rf3 Qa7 23. Rxf8+ Kxf8 24. Rd1 Qf7 25. Be2 Kg8 26. Rf1 Qa7 27. Qf4 Bd7 28. Qf7+ Kh8 29. Qf8+ Rxf8 30. Rxf8# 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Keizer, Theodoor"]
[Black "Aarts, Maikel"]
[Result "0-1"]
[ECO "D05"]
[PlyCount "64"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 c5 2. c3 e6 3. Nf3 Nc6 4. e3 Nf6 5. Bd3 Be7 6. Nbd2 d5 7. dxc5 Bxc5 8. b4 Bd6 9. 0-0 0-0 10. a3 Qc7 11. Bb2 e5 12. e4 Bg4 13. exd5 Nxd5 14. Bxh7+ Kh8 15. Be4 Nf4 16. c4 f5 17. c5 fxe4 18. cxd6 Qxd6 19. Nxe4 Qg6 20. Nh4 Qxe4 21. f3 Qh7 22. fxg4 Qxh4 23. g3 Nh3+ 24. Kg2 Qh7 25. Qe2 Nd4 26. Bxd4 exd4 27. Qe7 Rfe8 28. Qh4 Qxh4 29. gxh4 Re3 30. Rf3 Rxf3 31. Kxf3 Rf8+ 32. Ke4 Rf4+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Van Weersel, Arlette"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B05"]
[PlyCount "47"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. Nf3 Nc6 6. Nbd2 Bg4 7. Be2 e6 8. 0-0 Be7 9. exd6 cxd6 10. b3 0-0 11. Bb2 d5 12. Rc1 g5 13. h3 Bxf3 14. Nxf3 f5 15. a3 a5 16. Re1 g4 17. hxg4 fxg4 18. Nh2 Bd6 19. g3 Qf6 20. Nxg4 Qg7 21. c5 h5 22. cxd6 hxg4 23. Bxg4 Rf6 24. Bxe6+ 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Kranenburg, Leo"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B01"]
[PlyCount "44"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Nc6 7. exd6 Bxd6 8. c4 Nf4 9. Bxf4 Bxf4 10. d5 Ne7 11. Qd4 Bxf3 12. Bxf3 Qd6 13. Re1 Bxh2+ 14. Kh1 e5 15. Qh4 Bf4 16. g3 Bh6 17. Nc3 0-0 18. Ne4 Nf5 19. Qh3 Qg6 20. Bh5 Qb6 21. Qxf5 g6 22. Qxe5 gxh5 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Hummel, Erik Jan"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B22"]
[PlyCount "60"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. Nc3 e6 6. d4 Nxc3 7. bxc3 d6 8. cxd6 cxd6 9. exd6 Bxd6 10. Nf3 Qc7 11. Bb2 0-0 12. Bd3 h6 13. Qe2 Nc6 14. 0-0 e5 15. d5 Ne7 16. c4 Bg4 17. Rfe1 Ng6 18. Qe3 Bxf3 19. Qxf3 Nf4 20. c5 Nxd3 21. cxd6 Qc4 22. Re4 Qxd5 23. Ba3 f5 24. Re3 e4 25. Qd1 b5 26. Rg3 b4 27. Bb2 Rf7 28. Rg6 Kh7 29. Rg3 Qxd6 30. f4 Qc5+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "Keizer, Theodoor"]
[Black "Muhren, Willem"]
[Result "0-1"]
[ECO "D05"]
[PlyCount "50"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. c3 Nc6 6. Nbd2 Bd6 7. dxc5 Bxc5 8. b4 Bd6 9. 0-0 0-0 10. a3 Ne5 11. Nxe5 Bxe5 12. Bb2 b6 13. f4 Bd6 14. c4 dxc4 15. Nxc4 Be7 16. Qe2 Ba6 17. Rad1 Qc7 18. a4 Rad8 19. Be5 Qc8 20. b5 Bb7 21. Bb1 Qc5 22. Bd4 Qh5 23. Qxh5 Nxh5 24. e4 Rxd4 25. Rxd4 Bc5 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Keizer, Theodoor"]
[Black "Lesger, Morrison"]
[Result "1-0"]
[ECO "D04"]
[PlyCount "63"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Nbd2 d5 4. e3 Bg7 5. Bd3 0-0 6. Ne5 b6 7. f4 c5 8. c3 Ne8 9. h3 f6 10. Nef3 e5 11. fxe5 fxe5 12. dxe5 Bxe5 13. 0-0 Bg7 14. e4 d4 15. Bc4+ Kh8 16. Bd5 dxc3 17. bxc3 Ba6 18. Re1 Bxc3 19. Rb1 Nc7 20. Bxa8 Bd3 21. Bb2 Nb5 22. Qb3 Bd4+ 23. Bxd4+ Nxd4 24. Qxd3 Nxf3+ 25. Qxf3 Rxf3 26. Nxf3 Na6 27. Bd5 Nb4 28. Rbd1 Qe7 29. Bc4 Nc6 30. e5 Nd4 31. Nxd4 cxd4 32. Rxd4 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Snuverink, Michiel"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B05"]
[PlyCount "35"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Nc6 7. c4 Nb6 8. Nc3 Be7 9. Be3 0-0 10. exd6 cxd6 11. d5 Bxf3 12. Bxf3 Ne5 13. b3 Bf6 14. Rc1 Nxf3+ 15. Qxf3 Bxc3 16. Rxc3 Qf6 17. Qxf6 gxf6 18. Bh6 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Keizer, Theodoor"]
[Black "Lui, Kachun"]
[Result "1-0"]
[ECO "D12"]
[PlyCount "63"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. e3 Bf5 4. c4 c6 5. Nc3 e6 6. Be2 Bd6 7. 0-0 0-0 8. Ne5 Nbd7 9. g4 Bg6 10. Nxg6 hxg6 11. f4 dxc4 12. e4 Bc7 13. g5 Ne8 14. Bxc4 b5 15. Bb3 Bb6 16. Kh1 Nc7 17. a4 b4 18. a5 Bxa5 19. Rxa5 bxc3 20. bxc3 Nb5 21. Rxb5 cxb5 22. Ba3 Re8 23. Qg4 Nb6 24. f5 gxf5 25. exf5 Nc4 26. Bxc4 bxc4 27. f6 Qd5+ 28. Kg1 e5 29. g6 Rf8 30. fxg7 Kxg7 31. gxf7+ Kh7 32. Rf5 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.09"]
[Round "9"]
[White "Kowalczyk, Stefan"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "D60"]
[PlyCount "81"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. d4 e6 4. Bg5 Bb7 5. Nc3 Be7 6. e3 d5 7. Bd3 Nbd7 8. 0-0 0-0 9. b3 c5 10. Qc2 h6 11. Bh4 Rc8 12. Nd2 g5 13. Bg3 dxc4 14. bxc4 cxd4 15. exd4 Nh5 16. Rad1 Nxg3 17. hxg3 Nf6 18. Nde4 Nxe4 19. Nxe4 Bxe4 20. Bxe4 Qc7 21. Bd3 Rfd8 22. Qb1 Kg7 23. Be2 Bf6 24. Qe4 Qc6 25. Qe3 Rd6 26. d5 exd5 27. cxd5 Qe8 28. Qa3 Qd7 29. Bg4 Rc3 30. Qxc3 Bxc3 31. Bxd7 Rxd7 32. Rd3 Bb4 33. Rc1 Bc5 34. Kf1 Kf6 35. Re1 Kf5 36. Rf3+ Kg6 37. Rd3 Kf5 38. Re8 Kg6 39. Ke2 Kf5 40. Rh8 Kg6 41. g4 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.08"]
[Round "8"]
[White "Keizer, Theodoor"]
[Black "Pouw, Pieter"]
[Result "0-1"]
[ECO "E92"]
[PlyCount "70"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. d5 a5 8. 0-0 Ne8 9. Ne1 f5 10. Nd3 f4 11. Bg4 Nf6 12. Bxc8 Qxc8 13. Bd2 g5 14. f3 b6 15. a3 h5 16. b4 g4 17. c5 axb4 18. axb4 Rxa1 19. Qxa1 bxc5 20. bxc5 gxf3 21. Rxf3 Nh7 22. c6 Ng5 23. Rf1 Bh6 24. Ne1 Na6 25. Nf3 Nc5 26. Qb1 Qa8 27. Nxg5 Bxg5 28. Qa1 Qe8 29. Qa7 Bd8 30. Rf3 Qg6 31. Qa2 Kh7 32. Qc2 Rg8 33. Be1 Qg4 34. Qd2 Nb3 35. Rh3 Qxh3 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.07"]
[Round "7"]
[White "Stellwagen, Daniel"]
[Black "Keizer, Theodoor"]
[Result "1/2-1/2"]
[ECO "B05"]
[WhiteElo "2265"]
[PlyCount "91"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 Nc6 6. 0-0 e6 7. c4 Nde7 8. exd6 cxd6 9. Nc3 d5 10. Bg5 dxc4 11. Bxc4 h6 12. Bh4 g5 13. Bg3 Bg7 14. d5 exd5 15. Nxd5 Nxd5 16. Bxd5 0-0 17. Qb3 Qb6 18. Qa4 Bxf3 19. Bxf3 Nd4 20. Bh5 Rac8 21. Rae1 Qxb2 22. Bd6 Rfd8 23. Be7 Re8 24. Bg4 b5 25. Qa6 Ra8 26. Bd7 Ne2+ 27. Rxe2 Qxe2 28. Bxe8 Rxe8 29. Bc5 Ra8 30. Qb7 Qe8 31. Bd6 a6 32. h3 Qc8 33. Qb6 Qd8 34. Qc6 Qe8 35. Qb7 Qc8 36. Qf3 Qe8 37. Bb4 a5 38. Bc5 Bf8 39. Bd4 Bg7 40. Be3 b4 41. Qg4 Qe6 42. Qf3 Ra6 43. Qb7 Bc3 44. Bc5 Kg7 45. Rd1 Qe2 46. Rf1 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.06"]
[Round "6"]
[White "Kommer, Bas"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "A48"]
[PlyCount "86"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. e3 c5 5. c3 cxd4 6. exd4 d6 7. Bd3 0-0 8. 0-0 h6 9. Bh4 Re8 10. Re1 Nbd7 11. Nbd2 g5 12. Bg3 Nh5 13. Nc4 Ndf6 14. Ne3 Nxg3 15. fxg3 a6 16. Qb3 Qc7 17. Nf5 Bxf5 18. Bxf5 e6 19. Bd3 e5 20. dxe5 dxe5 21. Bf5 Rad8 22. Re2 Qc5+ 23. Kh1 e4 24. Nd4 Rxd4 25. cxd4 Qxf5 26. Rd1 Qd5 27. Qa4 Re6 28. b3 e3 29. Qc4 Qxc4 30. bxc4 Ne4 31. d5 Re5 32. Rde1 Nd2 33. Rxe3 Nxc4 34. Rxe5 Bxe5 35. Rd1 f6 36. Kg1 Kf7 37. Kf2 b5 38. h3 f5 39. Rc1 Ke7 40. a4 Kd6 41. axb5 axb5 42. Rb1 Kc5 43. Rb3 Nb6 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.05"]
[Round "5"]
[White "Keizer, Theodoor"]
[Black "Stange, Sven"]
[Result "0-1"]
[ECO "E15"]
[PlyCount "48"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 Be7 6. Bg2 Bb7 7. 0-0 0-0 8. Nc3 c5 9. Bf4 d6 10. dxc5 bxc5 11. Rfd1 a6 12. Qb3 Qc7 13. Rd2 Nc6 14. Na4 Ne4 15. Rdd1 Rab8 16. a3 f5 17. Nc3 h6 18. Qc2 Nxc3 19. Qxc3 Rfd8 20. Rd2 Bf6 21. Qc2 Na5 22. Ne1 Bxg2 23. Nxg2 Nb3 24. Bxd6 Rxd6 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.04"]
[Round "4"]
[White "Keizer, Theodoor"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "E73"]
[PlyCount "55"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 Nc6 6. Bg5 0-0 7. h4 e5 8. d5 Nd4 9. Nf3 h6 10. Be3 Nxe2 11. Qxe2 Ng4 12. h5 Nxe3 13. Qxe3 g5 14. 0-0-0 f5 15. g3 Bd7 16. Nd2 f4 17. Qd3 a6 18. Rhg1 Bg4 19. f3 Bxh5 20. g4 Be8 21. a4 Rf7 22. b4 Bf8 23. Nb3 c6 24. dxc6 bxc6 25. c5 Rd7 26. cxd6 Bxd6 27. Nc5 Bxc5 28. Qc4+ 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.03"]
[Round "3"]
[White "Van der Vegt, Lenze"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "D60"]
[PlyCount "87"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 Nbd7 5. Bg5 e6 6. e3 Be7 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. 0-0 0-0 11. Qe2 b4 12. Na4 Qa5 13. b3 c5 14. Bh4 cxd4 15. Nxd4 g5 16. Bg3 Rac8 17. Rac1 h6 18. Rfd1 Nc5 19. Nxc5 Rxc5 20. e4 Rfc8 21. Rxc5 Qxc5 22. Nf3 Nh5 23. Nd2 Nxg3 24. hxg3 Bf6 25. Nc4 e5 26. Ne3 Kh7 27. Qh5 Rc7 28. Qf3 Bg7 29. Bc4 Qf8 30. Nf5 Bc8 31. Ne3 Be6 32. Rd2 Bxc4 33. Nxc4 Qe7 34. Kf1 f6 35. Qd1 Bf8 36. Rd8 Qf7 37. Qd5 Qxd5 38. exd5 Be7 39. Rb8 Rd7 40. Rb5 Kg6 41. Ke2 Bd6 42. g4 f5 43. Ra5 Bb8 44. d6 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.02"]
[Round "2"]
[White "Keizer, Theodoor"]
[Black "Castellani, Sandro"]
[Result "0-1"]
[ECO "A47"]
[PlyCount "79"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 b6 3. Nc3 Bb7 4. Bg5 e6 5. e3 Be7 6. Bd3 d5 7. Ne2 Nbd7 8. 0-0 Rc8 9. c3 0-0 10. Bxf6 Bxf6 11. Ng3 c5 12. Qe2 Qc7 13. Nh5 Be7 14. Nd2 g6 15. Nf4 Bd6 16. g3 e5 17. dxe5 Nxe5 18. Ba6 Rfe8 19. Bxb7 Qxb7 20. Nf3 d4 21. Nxe5 Bxe5 22. cxd4 cxd4 23. Rac1 dxe3 24. fxe3 Rxc1 25. Rxc1 Qe4 26. Qd2 Bf6 27. Re1 Rd8 28. Qc1 Qb4 29. Re2 Qa4 30. b3 Qd7 31. Kf2 Qf5 32. Qc2 Qd7 33. Qc1 Be7 34. e4 Bc5+ 35. Kg2 Qd4 36. Nd5 Rxd5 37. exd5 Qxd5+ 38. Kh3 Qh5+ 39. Kg2 Qxe2+ 40. Kh3 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.01"]
[Round "1"]
[White "Molinari, Gabriel"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "2099"]
[PlyCount "60"]
[EventDate "2000.05.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 d4 4. Nce2 Ng4 5. f4 h5 6. Nf3 c5 7. Ng3 h4 8. Ne4 Qd5 9. Qe2 Bf5 10. d3 Nc6 11. h3 Ne3 12. Bxe3 dxe3 13. Qxe3 Nb4 14. Qe2 e6 15. a3 Nc6 16. Nc3 Qd7 17. Qf2 Be7 18. Be2 0-0-0 19. 0-0 Rdg8 20. Ne4 b6 21. c3 f6 22. b4 cxb4 23. axb4 fxe5 24. Nxe5 Nxe5 25. fxe5 g5 26. Nf6 Bxf6 27. exf6 Rf8 28. Qf3 Qb7 29. Qe3 Rxf6 30. Bf3 Qc7 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Keizer, Theodoor"]
[Black "Gerritse, Xanthine"]
[Result "1-0"]
[ECO "C67"]
[PlyCount "65"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Ba4 0-0 8. d4 Bf6 9. c3 Re8 10. f4 g6 11. Bc2 Bg7 12. Na3 f6 13. Nf3 Rxe1+ 14. Qxe1 Qe7 15. Bd2 b6 16. d5 Qxe1+ 17. Rxe1 Nd8 18. c4 N8f7 19. Bb4 a5 20. Bc3 Kf8 21. Ba4 Nd8 22. Nd4 N8b7 23. Nab5 Nxc4 24. Nxc7 Rb8 25. Re8+ Kf7 26. Bxd7 Bxd7 27. Rxb8 Nc5 28. b3 Nd6 29. Rxb6 Nde4 30. Bxa5 f5 31. Nde6 Nxe6 32. dxe6+ Ke7 33. Nd5+ 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Lieven, Menno"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B03"]
[PlyCount "116"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. Nc3 d6 5. exd6 exd6 6. d4 Nc6 7. Be3 Be7 8. Nf3 Bg4 9. h3 Bh5 10. a3 0-0 11. Bd3 Bxf3 12. Qxf3 Bf6 13. 0-0 g6 14. Ne2 Bg7 15. Rfd1 Qf6 16. Qxf6 Bxf6 17. Rac1 Rad8 18. b4 d5 19. c5 Nc8 20. Bc2 N6e7 21. Bf4 c6 22. Kf1 g5 23. Bh2 Bg7 24. f4 gxf4 25. Bxf4 Ng6 26. Bh2 f5 27. Nf4 Rde8 28. Kf2 Rf7 29. Rd3 Re4 30. Ne2 Re8 31. Rf3 Ref8 32. Rd1 Bh6 33. Nf4 Re8 34. Nxg6 hxg6 35. Be5 Bg7 36. Bf4 Rfe7 37. Re3 Kf7 38. Rxe7+ Nxe7 39. Ke3 Ng8+ 40. Kd3 Nf6 41. Rd2 Ne4 42. Re2 Rh8 43. Ke3 g5 44. Bh2 g4 45. Bxe4 fxe4 46. Rf2+ Ke6 47. Bg1 gxh3 48. g4 Bh6+ 49. Ke2 e3 50. Rf3 Bg5 51. Bh2 Rh4 52. Ke1 Rxg4 53. Rxh3 Rxd4 54. Bg1 Re4 55. Ke2 d4 56. Rg3 Bh4 57. Kd3 Bxg3 58. Kxe4 e2 0-1

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Snuverink, Michiel"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B04"]
[PlyCount "59"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6 5. Bc4 Nb6 6. Bxf7+ Kxf7 7. Ng5+ Kg8 8. e6 Qe8 9. d5 Nd8 10. Qd3 h6 11. Nh3 c6 12. c4 g5 13. f4 g4 14. f5 gxh3 15. gxh3 cxd5 16. cxd5 Bg7 17. Rg1 Qf8 18. Nc3 Qf6 19. Be3 Qh4+ 20. Rg3 Qc4 21. Qd2 Kh7 22. 0-0-0 Bxc3 23. bxc3 Bxe6 24. fxe6 Qe4 25. Rg4 Qf5 26. Rf4 Qh5 27. Rg1 Rg8 28. Qd3+ Rg6 29. Rfg4 Nxe6 30. Rxg6 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Keizer, Theodoor"]
[Black "Van Rosmalen, Joost"]
[Result "1/2-1/2"]
[ECO "B18"]
[PlyCount "86"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4 e6 7. Nf3 Nd7 8. Bd3 Bxd3 9. Qxd3 Ngf6 10. 0-0 Bd6 11. Bd2 0-0 12. Kh1 Qc7 13. Ne5 Rad8 14. Nc4 Rfe8 15. Rae1 Nd5 16. Nxd6 Qxd6 17. Ne4 Qe7 18. Ng5 N7f6 19. f5 h6 20. Nf3 Qd6 21. Ne5 exf5 22. Rxf5 Nb4 23. Qg3 Kh7 24. c3 Nbd5 25. Qh4 Ne7 26. Rf3 Ng6 27. Nxg6 fxg6 28. h3 Nh5 29. Rfe3 Rxe3 30. Rxe3 Rf8 31. Kg1 Qd5 32. a3 Qb3 33. Bc1 Qc2 34. Qe1 Nf4 35. Qd2 Qb1 36. Rf3 Ne2+ 37. Qxe2 Rxf3 38. gxf3 Qxc1+ 39. Kg2 h5 40. Kh2 Kh6 41. Kg2 a6 42. Kf2 Kh7 43. Kg2 Qg5+ 1/2-1/2

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "Keizer, Theodoor"]
[Black "Te Bokkel, Gert Jan"]
[Result "1-0"]
[ECO "C78"]
[PlyCount "59"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Nxe4 7. Re1 Nc5 8. Nxe5 Nxe5 9. Rxe5+ Ne6 10. d4 d6 11. Re1 d5 12. Qh5 c6 13. f4 Be7 14. c3 Qc7 15. f5 Nf8 16. Bg5 g6 17. Qe2 Ne6 18. Bxe7 Qxe7 19. fxe6 Bxe6 20. Nd2 0-0-0 21. a4 Kb7 22. axb5 axb5 23. Ra5 Ra8 24. Rea1 Rxa5 25. Rxa5 Qc7 26. Ra1 h5 27. Qe5 Qd8 28. Bc2 g5 29. Nb3 Bc8 30. Nc5+ 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Vissers, V."]
[Black "Keizer, Theodoor"]
[Result "1/2-1/2"]
[ECO "D02"]
[PlyCount "42"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c6 3. c3 Nf6 4. Bg5 Bf5 5. e3 Nbd7 6. Bd3 Bxd3 7. Qxd3 e6 8. Ne5 Be7 9. 0-0 Ne4 10. Bxe7 Qxe7 11. f3 Nef6 12. Nd2 Nxe5 13. dxe5 Nd7 14. f4 0-0-0 15. b4 g5 16. b5 c5 17. a4 gxf4 18. exf4 c4 19. Qe3 Qc5 20. Qd4 Qxd4+ 21. cxd4 Kb8 1/2-1/2

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Brouwers, Geert"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "61"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. d4 e6 5. f4 c5 6. Nf3 Nc6 7. Be3 Qa5 8. Qd2 a6 9. Be2 b5 10. 0-0 b4 11. Nd1 c4 12. Ng5 h6 13. Nxf7 Kxf7 14. f5 exf5 15. Rxf5+ Kg8 16. Bh5 Ndxe5 17. Rxf8+ Kxf8 18. dxe5 Be6 19. Qf2+ Ke7 20. Qg3 Rag8 21. Nf2 g6 22. Bf3 b3 23. cxb3 cxb3 24. a3 h5 25. Rc1 Kd7 26. Nd3 Bf5 27. Nc5+ Ke8 28. Bxd5 Ne7 29. Bxg8 Rxg8 30. e6 Qb5 31. Qd6 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Keizer, Theodoor"]
[Black "Fakkel, Ewout"]
[Result "0-1"]
[ECO "B72"]
[PlyCount "80"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 0-0 8. Qd2 Nc6 9. Nb3 Bd7 10. f4 a6 11. 0-0-0 b5 12. Bf3 Rb8 13. h4 h5 14. Qe2 Na5 15. e5 Ne8 16. g4 Nxb3+ 17. axb3 b4 18. Nd5 e6 19. Nf6+ Nxf6 20. exf6 Qxf6 21. Bd4 Qxf4+ 22. Qe3 Qxe3+ 23. Bxe3 hxg4 24. Rxd6 Bb5 25. Bxg4 Rfd8 26. Rxd8+ Rxd8 27. h5 gxh5 28. Bxh5 Rd5 29. Bd2 a5 30. c4 bxc3 31. bxc3 Bd3 32. c4 Rf5 33. Bg4 Re5 34. Rh5 f5 35. Bc3 Re4 36. Bf3 Bxc3 37. Bxe4 Bxe4 38. Rh6 Kf7 39. Rh7+ Kf6 40. c5 Ke5 0-1

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Keizer, Theodoor"]
[Black "Visschedijk, Marijn"]
[Result "0-1"]
[ECO "D58"]
[PlyCount "50"]
[EventDate "1999.08.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 071 Extra"]
[Source "ChessBase"]
[SourceDate "1999.09.14"]
[SourceVersion "1"]
[SourceVersionDate "1999.09.14"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 e6 3. c4 Nf6 4. Bg5 Be7 5. Nc3 0-0 6. e3 h6 7. Bh4 b6 8. Bd3 Bb7 9. Ne5 c5 10. 0-0 Nc6 11. cxd5 Nxd5 12. Bxe7 Ncxe7 13. Qg4 Nf6 14. Qh4 Ned5 15. dxc5 Nxc3 16. bxc3 Qd5 17. c6 Bxc6 18. Nxc6 Qxd3 19. Rfd1 Qxc3 20. Rac1 Qa3 21. g4 Rfe8 22. g5 hxg5 23. Qxg5 Ne4 24. Qh4 Nc3 25. Re1 Ne2+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenewold, Jan Joris"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "E04"]
[PlyCount "57"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. g3 Nf6 4. Bg2 c6 5. Nf3 Nbd7 6. 0-0 dxc4 7. a4 a5 8. Nc3 Be7 9. Qc2 0-0 10. Rd1 Nd5 11. e4 Nb4 12. Qe2 Nd3 13. Ne1 Nxc1 14. Rdxc1 Nb6 15. Nc2 Qc7 16. Ne3 Bd7 17. Nxc4 Bf6 18. e5 Be7 19. Nd6 Nd5 20. Bxd5 exd5 21. Nxd5 Bxd6 22. Nxc7 Bxc7 23. f4 Be6 24. g4 Rad8 25. f5 Bd5 26. f6 gxf6 27. exf6 Rfe8 28. Qd2 Be4 29. Qh6 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Keizer, Theodoor"]
[Black "Benning, Tim"]
[Result "0-1"]
[ECO "C77"]
[PlyCount "92"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 b5 6. Bb3 b4 7. Nd5 Bc5 8. d3 d6 9. Bg5 h6 10. Nxf6+ gxf6 11. Bh4 Bd7 12. c3 Qe7 13. Nd2 Rg8 14. Qh5 Rg6 15. h3 0-0-0 16. 0-0-0 bxc3 17. bxc3 Ba3+ 18. Kc2 Be6 19. Qe2 Na7 20. d4 Nb5 21. d5 Bd7 22. Nc4 Bc5 23. a4 Na7 24. Na5 Kb8 25. Qxa6 Bc8 26. Qxa7+ Kxa7 27. Nc6+ Ka8 28. Nxe7 Rxg2 29. Nxc8 Rxc8 30. Rd2 Rcg8 31. Bg3 f5 32. Re1 fxe4 33. Rxe4 f5 34. Ree2 Rg5 35. Bh4 Rh5 36. Bd8 Kb7 37. f4 Rg8 38. Bf6 exf4 39. Bd4 Bxd4 40. cxd4 Rxh3 41. Rd3 f3 42. Rf2 Rgg3 43. Kd2 Rg2 44. Rdxf3 Rxf3 45. Rxg2 Rxb3 46. Kc2 Ra3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Keizer, Theodoor"]
[Black "Drewes, Benno"]
[Result "1/2-1/2"]
[ECO "B23"]
[PlyCount "40"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 e6 4. Nf3 d5 5. d3 d4 6. Ne2 f6 7. g3 b6 8. Bg2 Bb7 9. 0-0 Qd6 10. c3 e5 11. fxe5 fxe5 12. Ng5 Nh6 13. Qb3 0-0-0 14. cxd4 Nxd4 15. Nxd4 Qxd4+ 16. Kh1 Qxd3 17. Qe6+ Kb8 18. Qxe5+ Qd6 19. Qc3 Qd4 20. Qxd4 cxd4 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Keizer, Theodoor"]
[Black "Tangelder, Yonne"]
[Result "0-1"]
[ECO "C77"]
[PlyCount "64"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 Bc5 6. d3 b5 7. Bb3 0-0 8. Bg5 h6 9. Bh4 Be7 10. 0-0 Bb7 11. Bg3 d6 12. a3 Nd7 13. Nd5 Kh8 14. Nd2 Bh4 15. Bxh4 Qxh4 16. Nxc7 Rac8 17. Nd5 f5 18. f4 Nd4 19. Nf3 Nxf3+ 20. Rxf3 Nc5 21. Ba2 fxe4 22. Rh3 Qd8 23. b4 Ne6 24. dxe4 Nxf4 25. Nxf4 Rxf4 26. Bd5 Bxd5 27. exd5 Rd4 28. Rd3 Rf4 29. Rc1 Qb6+ 30. Kh1 Rcf8 31. Rd2 Qe3 32. Re2 Rf1+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Keizer, Theodoor"]
[Black "Tiele, Edwin"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "124"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 d6 4. Bc4 Bg4 5. h3 Bh5 6. d3 Be7 7. Be3 Nc6 8. g4 Bg6 9. Qd2 Qd7 10. 0-0-0 Na5 11. Nd5 Nxc4 12. Nxf6+ Bxf6 13. dxc4 Qa4 14. Kb1 Qxc4 15. Rhg1 Bxe4 16. Ne1 Bc6 17. Nd3 Qe6 18. f4 exf4 19. Bxf4 0-0-0 20. Qa5 Bd4 21. Rge1 Qd5 22. Qxd5 Bxd5 23. Nb4 Bf2 24. Nxd5 Bxe1 25. Rxe1 Rde8 26. Rxe8+ Rxe8 27. Kc1 c6 28. Nc3 Kd7 29. Kd2 h6 30. Bg3 g5 31. Kd3 d5 32. Ne2 c5 33. Nc3 d4 34. Ne4 Kc6 35. c3 dxc3 36. Nxc3 b5 37. Ne4 Re6 38. Nd2 Kd5 39. Bf2 a5 40. Nb1 c4+ 41. Kd2 b4 42. a3 Ke4 43. axb4 Kf3 44. Bc5 axb4 45. Bxb4 Kg3 46. Kc3 Rc6 47. Nd2 Kxh3 48. Nxc4 Kxg4 49. Kd4 Kf5 50. Ne3+ Ke6 51. Ng4 h5 52. Ne5 Rc8 53. Ba5 g4 54. b4 f6 55. Nd3 h4 56. Ke3 Rc3 57. b5 Rb3 58. b6 g3 59. Ke2 Kf5 60. Nc5 g2 61. Kf2 Rb2+ 62. Kg1 h3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Keizer, Theodoor"]
[Black "Van Den Brink, Johan"]
[Result "0-1"]
[ECO "E38"]
[PlyCount "71"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 0-0 5. e3 c5 6. Be2 Nc6 7. 0-0 b6 8. Qc2 Bxc3 9. bxc3 Ba6 10. Ba3 d6 11. Rfd1 Qe7 12. Rd2 Na5 13. Qa4 Qe8 14. Qxe8 Rfxe8 15. d5 Bxc4 16. dxe6 fxe6 17. Kf1 Bxe2+ 18. Rxe2 Nc4 19. Bc1 Ne4 20. Rc2 Rf8 21. Ng1 Rf6 22. f3 d5 23. Ne2 Raf8 24. Kg1 Ned6 25. Ng3 e5 26. Re2 e4 27. fxe4 Nxe4 28. Bb2 Nxb2 29. Nxe4 dxe4 30. Rxb2 Rd8 31. Rc2 Rd3 32. Re1 b5 33. Rb2 Rb6 34. Kf2 Rxc3 35. Reb1 b4 36. Kg3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Lesger, Morrison"]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B03"]
[PlyCount "44"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. a3 e6 9. Nc3 Be7 10. Be2 0-0 11. b3 f6 12. Nf3 fxe5 13. d5 exd5 14. cxd5 Nd4 15. Bxd4 exd4 16. Nxd4 Bd7 17. Bf3 Bh4+ 18. g3 Bf6 19. 0-0 Bh3 20. Re1 Bxd4+ 21. Qxd4 Rxf3 22. Re2 Qf6 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Van den Boom, S."]
[Black "Keizer, Theodoor"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "48"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. f3 e6 4. d3 b6 5. Qe2 Bb7 6. Bg5 Be7 7. 0-0-0 d4 8. Nb1 0-0 9. Nd2 c5 10. Nb3 a5 11. a4 Qd7 12. Nxc5 bxc5 13. b3 Nc6 14. Qf2 Nxe4 15. fxe4 Bxg5+ 16. Kb2 f5 17. exf5 Rxf5 18. Qe2 Ne5 19. g4 Nxg4 20. Bg2 Bxg2 21. Qxg4 Bxh1 22. Nh3 Bf3 23. Qg1 Bxd1 24. Qxd1 Raf8 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Wezenaar, Femke"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "51"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Nf3 Nc6 5. Bb5 e6 6. 0-0 Bd7 7. d4 Bd6 8. Qe2 0-0 9. Bd3 h6 10. Ne5 Nxd4 11. Qe4 Nf5 12. Nxd7 Nxc3 13. bxc3 Qxd7 14. g4 g6 15. gxf5 exf5 16. Qh4 h5 17. Bh6 Be7 18. Qg3 Bd6 19. Qe3 Rfe8 20. Qd4 Bxh2+ 21. Kxh2 Qxd4 22. cxd4 Rad8 23. Be3 f4 24. Bxf4 Rxd4 25. Bxc7 g5 26. Rae1 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "2"]
[White "Berkvens, Joost"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "49"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. g3 d6 4. exd6 exd6 5. Bg2 Nf6 6. d4 Nbd7 7. c4 Be7 8. Nf3 0-0 9. 0-0 c6 10. Nc3 Nb6 11. b3 Ne8 12. Bb2 f5 13. Ne2 d5 14. c5 Nd7 15. Nf4 Ndf6 16. Re1 Nc7 17. Ne5 Ng4 18. Nfd3 g6 19. Nxg4 fxg4 20. Ne5 Ne8 21. Nxg4 Bxg4 22. Qxg4 Nf6 23. Qe6+ Rf7 24. Bc1 Qd7 25. Bh3 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "1"]
[White "Goossen, Gerard"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B04"]
[PlyCount "29"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nc6 5. c4 Nb6 6. Be2 dxe5 7. d5 Nb4 8. a3 Na6 9. Nxe5 e6 10. b4 Bd7 11. Bb2 Ba4 12. Qd4 c5 13. Qe3 Rg8 14. b5 Nc7 15. Bd3 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "9"]
[White "Gorter, Janko"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B02"]
[PlyCount "94"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. f4 e6 5. Nf3 c5 6. g3 Nc6 7. Bg2 Be7 8. 0-0 Qb6 9. d3 0-0 10. Kh1 a6 11. Ne2 f6 12. exf6 Nxf6 13. c3 Bd7 14. d4 Rac8 15. Ne5 Kh8 16. Nxd7 Nxd7 17. Bh3 Nd8 18. Qd3 Nf6 19. Rb1 Qc6 20. Be3 c4 21. Qc2 g6 22. g4 Nf7 23. Ng3 Rce8 24. Rbe1 Bd6 25. Bc1 Bc7 26. Qe2 Nd8 27. Qg2 Kg7 28. Re2 Kh8 29. Rfe1 a5 30. f5 Bxg3 31. Qxg3 Ne4 32. Qe5+ Kg8 33. fxg6 hxg6 34. Bh6 Rf7 35. Bg2 Nf6 36. h3 Ne4 37. Bxe4 dxe4 38. Rxe4 Ree7 39. Qg5 e5 40. d5 Qf6 41. Qxf6 Rxf6 42. Rxe5 Rxe5 43. Rxe5 Nf7 44. Re8+ Kh7 45. Be3 Rf3 46. Bd4 Rf1+ 47. Kg2 Ra1 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "5"]
[White "Keizer, Theodoor"]
[Black "Drost, Daan"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "72"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 d5 3. exd5 exd5 4. d4 c6 5. Nf3 Bd6 6. Bd3 Bg4 7. h3 Bh5 8. Be3 Nd7 9. g4 Bg6 10. Qd2 Qc7 11. 0-0-0 0-0-0 12. Ne2 Ngf6 13. Nh4 Bxd3 14. cxd3 g6 15. Ng2 Rde8 16. Kb1 Nf8 17. Rc1 Ne6 18. Nc3 Qa5 19. Bf4 Bxf4 20. Nxf4 Nxd4 21. Qd1 Kb8 22. Nce2 Qb6 23. Nxd4 Qxd4 24. Qf3 Nd7 25. Ne2 Qf6 26. Qxf6 Nxf6 27. Rhe1 Re7 28. Nd4 Rhe8 29. Nf3 Kc7 30. Rxe7+ Rxe7 31. Re1 Rxe1+ 32. Nxe1 Kd6 33. Nf3 h5 34. gxh5 Nxh5 35. Kc2 Nf4 36. h4 Nh3 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "6"]
[White "Keizer, Theodoor"]
[Black "Lahaye, Jordy"]
[Result "0-1"]
[ECO "D30"]
[PlyCount "56"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. Bg5 Nf6 3. e3 Nbd7 4. Nf3 e6 5. c4 c6 6. Nbd2 Be7 7. Bd3 0-0 8. 0-0 b6 9. Qc2 Bb7 10. Ne5 h6 11. Bxf6 Bxf6 12. f4 Rc8 13. Rac1 a6 14. b3 c5 15. Qd1 Nb8 16. Kh1 dxc4 17. Ndxc4 b5 18. Nb2 Qd5 19. Rf2 cxd4 20. Rxc8 Rxc8 21. exd4 Rd8 22. Qh5 Rf8 23. Rd2 Nc6 24. Nd1 Nxd4 25. Ne3 Qc5 26. Rd1 Bxe5 27. fxe5 f5 28. exf6 Qxh5 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "8"]
[White "Keizer, Theodoor"]
[Black "Van Ruitenburg, Joost"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "77"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 d5 2. Bg5 f6 3. Bf4 e6 4. Nf3 c5 5. e3 Nc6 6. Nc3 a6 7. a3 Bd6 8. Bg3 Nge7 9. Be2 0-0 10. Bxd6 Qxd6 11. Qd2 b5 12. dxc5 Qxc5 13. b4 Qb6 14. 0-0 Bb7 15. Nd4 Nxd4 16. exd4 Nf5 17. Rfd1 Rac8 18. Bg4 Qc7 19. Ne2 Qxc2 20. Qxc2 Rxc2 21. Nf4 Kf7 22. Nxe6 Kxe6 23. Re1+ Kf7 24. Bxf5 Rc4 25. Rac1 Re8 26. Kf1 Rxe1+ 27. Rxe1 Bc8 28. Bxc8 Rxc8 29. Re3 Rc2 30. Ke1 h5 31. Rd3 g5 32. Kf1 Rc4 33. g3 Kg6 34. Kg2 Kf5 35. Rf3+ Ke4 36. Rxf6 Kxd4 37. Rxa6 Kc3 38. a4 d4 39. a5 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "3"]
[White "Keizer, Theodoor"]
[Black "Van der Meulen, Jan Gerben"]
[Result "0-1"]
[ECO "B40"]
[PlyCount "60"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Nc3 Nc6 4. d3 d6 5. Be2 g6 6. 0-0 Bg7 7. Qe1 Nge7 8. Bd2 0-0 9. a3 Rb8 10. Rb1 a6 11. Nd1 b5 12. c3 a5 13. Ne3 f5 14. h3 Bb7 15. exf5 exf5 16. Nc2 Nc8 17. Bf4 Nb6 18. d4 c4 19. Ne3 Ne7 20. Qd2 Ned5 21. Nxd5 Nxd5 22. Bh2 Qd7 23. Bd1 Rbe8 24. Bc2 Re7 25. Rbe1 Rfe8 26. Rxe7 Rxe7 27. Re1 Rxe1+ 28. Qxe1 Bh6 29. Kf1 Nf4 30. Ng1 Bxg2# 0-1

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "4"]
[White "Pot, Erik"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "53"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Bb6 6. Nc3 d6 7. Bb5 Bd7 8. 0-0 Nge7 9. Qd2 Ne5 10. Be2 0-0 11. f4 Ng4 12. Bxg4 Bxg4 13. f5 Bxd4 14. Bxd4 f6 15. Qf4 Bh5 16. g4 Be8 17. h4 Nc6 18. Rad1 Ne5 19. Bxe5 fxe5 20. Qf2 Bc6 21. g5 Qd7 22. h5 a6 23. Qh4 Kh8 24. Rd2 Rf7 25. Rh2 Rg8 26. g6 Rf6 27. h6 1-0

[Event "NED-ch U16"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "7"]
[White "Rijnaarts, Sjef"]
[Black "Keizer, Theodoor"]
[Result "1-0"]
[ECO "B03"]
[PlyCount "63"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. exd6 cxd6 5. c4 Nb6 6. Nf3 Bg4 7. h3 Bh5 8. Nc3 Nc6 9. Be3 Bxf3 10. Qxf3 g6 11. Qd1 Bg7 12. Be2 0-0 13. 0-0 e6 14. Qd2 d5 15. c5 Nc8 16. a3 a5 17. Rac1 Qd7 18. Rfd1 Re8 19. Bf3 a4 20. Qc2 Rd8 21. Be2 Na5 22. Bb5 Qc7 23. Nxa4 Nc4 24. Bxc4 dxc4 25. Qxc4 Qa5 26. Nc3 Ne7 27. Bg5 Rd7 28. Ne4 Nf5 29. Nf6+ Bxf6 30. Bxf6 Ne7 31. Bg5 Nd5 32. Rd3 1-0

