[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Lettinga, Niels"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "C14"]
[PlyCount "103"]
[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 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Nf3 a6 8. Be2 c5 9. Na4 Nc6 10. dxc5 Nxc5 11. Nxc5 Qxc5 12. c3 Qb6 13. Qc1 0-0 14. 0-0 Bd7 15. Bd3 Ne7 16. Qd2 Bb5 17. Bxb5 Qxb5 18. Rfe1 Rac8 19. Re3 Ng6 20. Nd4 Qb6 21. Qc2 Qc7 22. Rae1 b5 23. Qb3 Qc4 24. Qxc4 bxc4 25. g3 Rb8 26. R3e2 Rfc8 27. f4 Ne7 28. Rb1 Nc6 29. Nxc6 Rxc6 30. Kf1 a5 31. Ke1 a4 32. Kd1 Rcb6 33. Kc1 Kf8 34. Kc2 Ke7 35. g4 f6 36. exf6+ gxf6 37. f5 Kf7 38. fxe6+ Rxe6 39. Rxe6 Kxe6 40. Re1+ Kf7 41. h3 Rb6 42. Re3 Re6 43. Kd2 Re5 44. Ke2 Kg6 45. h4 Rxe3+ 46. Kxe3 h5 47. Kf4 Kh6 48. Kf5 hxg4 49. Kxg4 Kg6 50. a3 f5+ 51. Kf4 Kh5 52. Kxf5 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Timmermans, Mark"]
[Black "Lettinga, Niels"]
[Result "0-1"]
[ECO "C68"]
[PlyCount "116"]
[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 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4 6. Nxd4 Bc5 7. Be3 Nf6 8. Nc3 0-0 9. 0-0 Re8 10. Qd3 Ng4 11. Rad1 Qd6 12. Nf3 Qxd3 13. Rxd3 Nxe3 14. fxe3 Bg4 15. a3 Rad8 16. Rfd1 Rd6 17. b4 Rxd3 18. Rxd3 Be7 19. Ne5 Be6 20. Ne2 Bd6 21. Nf3 Bc4 22. Rd2 Bxe2 23. Rxe2 Rxe4 24. Kf2 Re6 25. Rd2 Kf8 26. Ng5 Rf6+ 27. Ke2 Ke8 28. h4 Rg6 29. Kd3 Be7 30. Nf3 Rd6+ 31. Ke2 Rg6 32. Kf2 Rh6 33. g3 Rg6 34. Rd4 Bf6 35. Re4+ Be7 36. Ng5 h6 37. Nf3 Kf8 38. Ne5 Re6 39. Kf3 Bd6 40. Kf4 f6 41. Kf5 Rxe5+ 42. Rxe5 Bxe5 43. g4 Kf7 44. g5 g6+ 45. Ke4 hxg5 46. hxg5 Bb2 47. a4 Ba3 48. c3 b5 49. axb5 cxb5 50. gxf6 Kxf6 51. Kf4 c5 52. bxc5 Bxc5 53. e4 Bd6+ 54. Ke3 Be5 55. Kd3 a5 56. c4 bxc4+ 57. Kxc4 Bc7 58. Kd4 a4 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Lettinga, Niels"]
[Black "Brandenburg, Rik"]
[Result "1-0"]
[ECO "B80"]
[PlyCount "83"]
[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bg5 Be7 7. Bb5+ Nbd7 8. 0-0 a6 9. Bxd7+ Bxd7 10. Re1 Nxe4 11. Bxe7 Nxc3 12. Bxd8 Nxd1 13. Rexd1 Rxd8 14. Re1 0-0 15. Rad1 e5 16. Ne2 Bc6 17. Nc3 f5 18. Re2 g5 19. Red2 Rf6 20. Nd5 Re6 21. Nc3 f4 22. Nd5 Kf7 23. c4 h5 24. Nb6 g4 25. c5 Ke7 26. cxd6+ Rexd6 27. Rxd6 Rxd6 28. Nc8+ Kd7 29. Nxd6 Ke6 30. a3 Bd5 31. Ne8 Bb3 32. Rd2 h4 33. g3 hxg3 34. hxg3 Kf5 35. Nd6+ Ke6 36. Nxb7 Kf5 37. Nc5 Bc4 38. b3 Bf7 39. Nxa6 Bxb3 40. Nc5 Bc4 41. a4 e4 42. Rd4 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Lettinga, Niels"]
[Black "Blad, Jochem"]
[Result "1-0"]
[ECO "C48"]
[PlyCount "108"]
[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 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Nc3 d6 6. Bxc6+ bxc6 7. h3 Be6 8. Bg5 h6 9. Bh4 g5 10. Nxg5 hxg5 11. Bxg5 Rg8 12. h4 Rg6 13. Qf3 Bg4 14. Bxf6 Qxf6 15. Qxf6 Rxf6 16. f3 Be6 17. Na4 Bb6 18. a3 Kd7 19. Nxb6+ cxb6 20. 0-0-0 a5 21. Kd2 Rg6 22. Rdg1 Rag8 23. g4 Rf6 24. Ke3 Rf4 25. h5 f6 26. h6 Ke7 27. h7 Rh8 28. d4 Kf7 29. dxe5 fxe5 30. g5 Kg6 31. Rh6+ Kf7 32. Rxe6 Kxe6 33. g6 Rh4 34. g7 R4xh7 35. gxh8Q Rxh8 36. Kf2 Rh2+ 37. Rg2 Rxg2+ 38. Kxg2 d5 39. Kf2 dxe4 40. fxe4 Kd6 41. Ke3 b5 42. Kd3 a4 43. b3 c5 44. bxa4 bxa4 45. Kc4 Kc6 46. c3 Kd6 47. Kb5 c4 48. Kxc4 Kc6 49. Kb4 Kb6 50. Kxa4 Kc5 51. Kb3 Kc6 52. Kc4 Kd6 53. a4 Kc6 54. a5 Kb7 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "Potter van Loon, Rogier"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "61"]
[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 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 h6 6. Be3 Bxe3 7. fxe3 d6 8. 0-0 Bg4 9. d4 0-0 10. a3 b6 11. Qd3 Bxf3 12. Rxf3 Rb8 13. Re1 Qd7 14. Bb5 d5 15. Rf2 exd4 16. exd4 Qe6 17. Rfe2 dxe4 18. Nxe4 Rbd8 19. c3 Nxe4 20. Qxe4 Qxe4 21. Rxe4 f5 22. Re6 Nb8 23. Re7 Rc8 24. Bd7 Nxd7 25. Rxd7 Rf7 26. Ree7 Rxe7 27. Rxe7 Kf8 28. Rd7 g6 29. Rh7 h5 30. Rh8+ Kf7 31. Rxc8 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Lettinga, Niels"]
[Black "Groenewolt, Jessica"]
[Result "1-0"]
[ECO "C62"]
[PlyCount "57"]
[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 e5 2. Nf3 Nc6 3. Bb5 d6 4. Bxc6+ bxc6 5. 0-0 Bg4 6. h3 Bh5 7. Nc3 Nf6 8. d3 d5 9. Bg5 Be7 10. Re1 0-0 11. Qe2 Rb8 12. Rab1 Re8 13. Nd1 Qd6 14. Ne3 dxe4 15. Bxf6 exf3 16. Bxe7 fxe2 17. Bxd6 cxd6 18. f3 d5 19. Rxe2 e4 20. dxe4 dxe4 21. Kf2 exf3 22. gxf3 Re6 23. Nc4 Rxe2+ 24. Kxe2 Re8+ 25. Kf2 g5 26. Rd1 Kg7 27. Rd7 Bg6 28. c3 Bd3 29. Rxd3 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Van Splunter, Arjen"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "69"]
[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 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Ne5 6. Nxf7 Nxf7 7. Bxf7+ Kxf7 8. Qh5+ Kf8 9. Qxc5+ d6 10. Qxd4 h6 11. Nc3 Nf6 12. e5 Qe7 13. Bf4 Nd7 14. Nd5 Qf7 15. Nxc7 dxe5 16. Qd6+ Qe7 17. Qxe7+ Kxe7 18. Be3 Rb8 19. Bxa7 b5 20. Bxb8 Nxb8 21. Nxb5 Nc6 22. 0-0 Ba6 23. c4 Nd4 24. Nxd4 exd4 25. Rfe1+ Kf6 26. b3 Bb7 27. Rad1 Rd8 28. Re2 d3 29. Re3 d2 30. Re2 Bc8 31. Rexd2 Re8 32. Rd8 Rxd8 33. Rxd8 Bf5 34. Rf8+ Ke5 35. Rxf5+ 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Rietveld, Manolis"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "147"]
[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. Nf3 Nc6 2. e4 e5 3. d4 exd4 4. Bc4 Bc5 5. c3 dxc3 6. Bxf7+ Kxf7 7. Qd5+ Ke8 8. Qh5+ g6 9. Qxc5 cxb2 10. Bxb2 Nf6 11. Ne5 Rf8 12. Nxc6 bxc6 13. Ba3 Rf7 14. Qe5+ Re7 15. Bxe7 Qxe7 16. Qxe7+ Kxe7 17. 0-0 Kf7 18. e5 Nd5 19. Nd2 Ba6 20. Rfe1 Bd3 21. Nf3 Rb8 22. e6+ dxe6 23. Ne5+ Kg7 24. Nxd3 Kf6 25. Nc5 Re8 26. Ne4+ Kf5 27. Rac1 Nb4 28. Rc5+ Nd5 29. g4+ Ke5 30. Rxc6 Re7 31. Nc5+ Kf6 32. Rcxe6+ Rxe6 33. Rxe6+ Kg7 34. g5 h6 35. gxh6+ Kxh6 36. Ne4 Nf4 37. Rc6 Ne2+ 38. Kf1 Nd4 39. Rxc7 Nb5 40. Rb7 Nd4 41. h4 Nf5 42. f4 Nxh4 43. Nf6 g5 44. fxg5+ Kxg5 45. Rh7 Nf5 46. Ne4+ Kg4 47. Rxa7 Ne3+ 48. Ke2 Nc4 49. Ra4 Ne5 50. Nd6+ Kg5 51. Ra5 Kf6 52. Rxe5 Kxe5 53. Nc4+ Kd4 54. Nd2 Kc3 55. Nb1+ Kb4 56. a3+ Kb3 57. Kd3 Ka4 58. Kc4 Ka5 59. Nc3 Kb6 60. Kb4 Ka6 61. a4 Kb6 62. Nd5+ Ka6 63. a5 Kb7 64. Nb6 Ka6 65. Ka4 Kb7 66. Kb5 Ka7 67. a6 Kb8 68. Ka5 Ka7 69. Nc8+ Ka8 70. Kb6 Kb8 71. Ne7 Ka8 72. Nd5 Kb8 73. a7+ Ka8 74. Nc7# 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Verboom, Linda"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C47"]
[PlyCount "139"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 d6 5. dxe5 dxe5 6. Qxd8+ Kxd8 7. Bg5 Be7 8. 0-0-0+ Ke8 9. Bb5 Bg4 10. Bxc6+ bxc6 11. Rd3 Rd8 12. Rxd8+ Kxd8 13. Nxe5 Ke8 14. Bxf6 Bxf6 15. Nxg4 Ke7 16. Nxf6 Kxf6 17. Rd1 Ke7 18. Na4 Rb8 19. Nc5 Rc8 20. Na6 Ke6 21. Nb4 Ke5 22. Nxc6+ Kxe4 23. Rd8 Rxd8 24. Nxd8 f6 25. Nc6 a6 26. Nb4 a5 27. Nc6 a4 28. b3 axb3 29. cxb3 Kd5 30. Nb4+ Kc5 31. Nd3+ Kd4 32. Kd2 g5 33. a4 Kd5 34. b4 Kc4 35. a5 Kb5 36. Nc5 f5 37. Ne6 c5 38. bxc5 Kxa5 39. c6 Kb6 40. c7 Kb7 41. Ke3 f4+ 42. Kf3 h5 43. Nxg5 Kxc7 44. Kxf4 Kd6 45. h3 Ke7 46. g4 hxg4 47. hxg4 Kf6 48. Ne4+ Kg6 49. g5 Kg7 50. Kf5 Kf7 51. Nc5 Kg7 52. f4 Kf7 53. g6+ Kg7 54. Ne6+ Kg8 55. g7 Kf7 56. Kg5 Kg8 57. Kh6 Kf7 58. Kh7 Kxe6 59. g8Q+ Kf5 60. Qe8 Kxf4 61. Qe6 Kg5 62. Qf7 Kg4 63. Kg6 Kh4 64. Kf6 Kg4 65. Ke5 Kg3 66. Qf4+ Kg2 67. Ke4 Kg1 68. Qd2 Kf1 69. Kf3 Kg1 70. Qg2# 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Lettinga, Niels"]
[Black "Voortman, Jasper"]
[Result "1-0"]
[ECO "C48"]
[PlyCount "109"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bd6 4. Nc3 Nf6 5. d3 0-0 6. 0-0 Nd4 7. Be3 Nxb5 8. Nxb5 a6 9. Nxd6 cxd6 10. Bg5 h6 11. Bh4 Qe7 12. Nd2 Qe6 13. Bxf6 Qxf6 14. Qf3 Qe6 15. Qf5 Qe7 16. Nc4 b5 17. Ne3 Bb7 18. Qg4 Qf6 19. Qxd7 Bc8 20. Qc6 Ra7 21. Nd5 Qe6 22. Qb6 Rd7 23. Qa5 Bb7 24. Nc7 Qe7 25. Nxa6 Ra8 26. Qxb5 Bxa6 27. Qd5 Bb7 28. Qb3 Qg5 29. Rfd1 d5 30. Qb5 Rad8 31. f3 Qe3+ 32. Kf1 f6 33. a4 dxe4 34. fxe4 Bxe4 35. Re1 Qf4+ 36. Ke2 Kh7 37. Qb4 Rd4 38. Qd2 Qxd2+ 39. Kxd2 Bxg2 40. Ra3 Re8 41. a5 e4 42. a6 e3+ 43. Rxe3 Rxe3 44. Kxe3 Rd8 45. a7 h5 46. c4 g5 47. d4 Bb7 48. d5 f5 49. Kd4 f4 50. Ke5 Kg6 51. Ke6 Ba8 52. Ke7 Rc8 53. d6 Bc6 54. d7 Rc7 55. a8Q 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Offringa, Tjaart Jan"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "D10"]
[PlyCount "79"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 Qb6 5. Qd2 Bf5 6. e3 h6 7. Bxf6 exf6 8. cxd5 cxd5 9. Nxd5 Qd8 10. Nc3 Nc6 11. Bb5 Qb6 12. d5 0-0-0 13. e4 Bg6 14. Rc1 Bb4 15. Qe2 Nd4 16. Qc4+ Kb8 17. Qxb4 Nxb5 18. Qxb5 Qxb5 19. Nxb5 Bxe4 20. Nf3 Bxf3 21. gxf3 Rhe8+ 22. Kf1 Rxd5 23. Nc7 Rc8 24. Nxd5 Rxc1+ 25. Kg2 Rxh1 26. Kxh1 Kc8 27. Ne7+ Kd7 28. Nf5 Kc6 29. Nxg7 Kc5 30. Nf5 b5 31. Nxh6 Kd4 32. Ng4 a5 33. h4 Kd3 34. Ne3 Kd2 35. h5 Kc1 36. h6 Kxb2 37. h7 Kxa2 38. h8Q b4 39. Qxf6 b3 40. Nc4 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Lettinga, Niels"]
[Black "Visser, Frank"]
[Result "1-0"]
[ECO "C68"]
[PlyCount "121"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 bxc6 5. Nc3 g6 6. Nxe5 Qe7 7. Nf3 Nf6 8. d3 d5 9. Bg5 Rb8 10. Rb1 Qe6 11. 0-0 Bd6 12. Bxf6 Qxf6 13. Re1 Bb4 14. Qd2 d4 15. Qg5 Qxg5 16. Nxg5 dxc3 17. bxc3 a5 18. cxb4 Rxb4 19. Rxb4 axb4 20. Nf3 Be6 21. Ra1 0-0 22. Nd4 c5 23. Nxe6 fxe6 24. a4 bxa3 25. Rxa3 Rb8 26. g3 Rb2 27. Rc3 Rb5 28. Kf1 Kf7 29. Ke2 Kf6 30. f4 h5 31. Ke3 e5 32. Rb3 exf4+ 33. Kxf4 g5+ 34. Ke3 Rxb3 35. cxb3 Ke5 36. h3 c6 37. g4 h4 38. Ke2 Kd4 39. Kd2 Ke5 40. Ke3 Kd6 41. d4 cxd4+ 42. Kxd4 c5+ 43. Kc4 Ke5 44. Kxc5 Kf4 45. e5 Kxe5 46. b4 Kf4 47. b5 Kg3 48. b6 Kxh3 49. b7 Kg2 50. b8Q h3 51. Qb1 h2 52. Kd5 h1Q 53. Qxh1+ Kxh1 54. Ke5 Kg2 55. Kf5 Kf3 56. Kxg5 Ke4 57. Kh6 Ke5 58. g5 Ke6 59. g6 Kf6 60. Kh7 Ke5 61. g7 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Lettinga, Niels"]
[Black "Luth, Jan Wilbert"]
[Result "1-0"]
[ECO "C62"]
[PlyCount "109"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. Bxc6+ bxc6 5. Nc3 g6 6. 0-0 Bg7 7. d3 Ne7 8. Be3 0-0 9. d4 exd4 10. Bxd4 Bxd4 11. Qxd4 d5 12. Rad1 Bb7 13. exd5 cxd5 14. Rd3 Nf5 15. Qc5 c6 16. Nd4 Ba6 17. Rf3 Nxd4 18. Qxd4 Bxf1 19. Kxf1 Re8 20. Qf4 Qe7 21. Re3 Qb7 22. Rf3 Rf8 23. Qh6 Qe7 24. Rh3 f6 25. Re3 Qg7 26. Qf4 Rae8 27. Rf3 Qb7 28. Qh4 Qa6+ 29. Rd3 Re7 30. b3 Rfe8 31. g3 Re1+ 32. Kg2 c5 33. Nxd5 Qe6 34. Nc7 Qe4+ 35. Kh3 Rf8 36. Nd5 Rd8 37. Nxf6+ Kf7 38. Nxe4 Re8 39. Nd6+ Ke6 40. Nxe8 Re5 41. Re3 Rxe3 42. fxe3 c4 43. Qg5 cxb3 44. cxb3 a5 45. e4 a4 46. Qd5+ Ke7 47. Qd6+ Kxe8 48. Qc7 axb3 49. axb3 h5 50. b4 g5 51. b5 g4+ 52. Kg2 h4 53. b6 hxg3 54. b7 gxh2 55. b8Q# 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "Van Run, Rieke"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "59"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Nf6 6. Bc4 c6 7. Bg5 Be7 8. e5 Ng8 9. Bxe7 Nxe7 10. Nc3 Ng6 11. g3 0-0 12. 0-0-0 Re8 13. f4 b6 14. Rhe1 Qc7 15. Ne4 Re7 16. Nd6 a5 17. Nf5 Re8 18. e6 Ne5 19. exf7+ Kf8 20. fxe8Q+ Kxe8 21. Qxe5+ Qxe5 22. Rxe5+ Kd8 23. Nxg7 b5 24. Bxb5 Kc7 25. Bxc6 Kxc6 26. Ne8 Ba6 27. Rd6+ Kb7 28. Rxd7+ Kc8 29. Nf6 Bc4 30. Re8# 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Lettinga, Niels"]
[Black "Verdult, Maarten"]
[Result "0-1"]
[ECO "C65"]
[PlyCount "106"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. Bxc6+ bxc6 6. Nc3 Bg4 7. h3 Bh5 8. Bg5 Be7 9. 0-0 0-0 10. Qe2 Rb8 11. Rab1 Nd7 12. Bxe7 Qxe7 13. Qe3 Nf6 14. Nd2 Ra8 15. Qg5 h6 16. Qh4 Bg6 17. Nc4 Rfe8 18. Na5 Qd7 19. Qg3 d5 20. exd5 cxd5 21. Rfe1 Nh5 22. Qh2 Nf4 23. Ne2 Nxe2+ 24. Rxe2 e4 25. dxe4 dxe4 26. Nb3 Rad8 27. Ree1 e3 28. f3 Bxc2 29. Rbc1 Bxb3 30. axb3 Rc8 31. Red1 Qe7 32. Ra1 Rcd8 33. Re1 e2 34. Qg3 Qc5+ 35. Kh1 Qb6 36. f4 Re3 37. Qf2 Rxh3+ 38. Kg1 Rh1+ 39. Kxh1 Qxf2 40. Rac1 Qxe1+ 41. Rxe1 Rd1 42. Rxd1 exd1Q+ 43. Kh2 Qxb3 44. g4 g6 45. g5 hxg5 46. f5 gxf5 47. Kg2 Kg7 48. Kf2 Kf6 49. Ke1 Qxb2 50. Kd1 Ke5 51. Ke1 Ke4 52. Kd1 Ke3 53. Ke1 Qe2# 0-1

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Reinders, Bram Hein"]
[Black "Lettinga, Niels"]
[Result "0-1"]
[ECO "C22"]
[PlyCount "52"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc3 Qf6 5. Qxf6 Nxf6 6. Bb5 a6 7. Bxc6 dxc6 8. e5 Nd5 9. Nf3 Nb4 10. Nc3 Nxc2+ 11. Ke2 Nxa1 12. Rd1 Bb4 13. Bd2 0-0 14. Rxa1 Bxc3 15. Bxc3 Bg4 16. Bb4 Rfe8 17. Kf1 Bxf3 18. gxf3 Rxe5 19. Bc3 Rh5 20. Rd1 h6 21. Rd7 Rxh2 22. Rxc7 Rb8 23. Rd7 f6 24. Bb4 Rh1+ 25. Kg2 Ra1 26. Ba3 Rxa2 0-1

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Broersen, Sjors"]
[Black "Lettinga, Niels"]
[Result "1-0"]
[ECO "C45"]
[PlyCount "51"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 d6 6. Be2 Nf6 7. 0-0 Be7 8. c4 Be6 9. Nc3 0-0 10. Kh1 c5 11. Qd3 Qb6 12. f4 Rfd8 13. a3 Nd7 14. Qg3 f6 15. Bd3 Kh8 16. Nd5 Bxd5 17. exd5 Re8 18. Qh3 Nf8 19. Rb1 g6 20. f5 gxf5 21. Bxf5 Bd8 22. Bh6 Qc7 23. Rbe1 Rxe1 24. Rxe1 Ng6 25. Re8+ Nf8 26. Rxf8# 1-0

[Event "NED U12 op"]
[Site "Hengelo"]
[Date "1999.??.??"]
[Round "5"]
[White "Lettinga, Niels"]
[Black "Van Kerkhof, David"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "56"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 d5 2. Nc3 Nf6 3. d3 dxe4 4. Bg5 exd3 5. Bxd3 e6 6. Nf3 Be7 7. 0-0 0-0 8. Qe2 Nc6 9. Bxf6 Bxf6 10. Qe4 g6 11. Bb5 Nd4 12. Nxd4 Qxd4 13. Qxd4 Bxd4 14. Be2 e5 15. Rad1 Bf5 16. Bd3 Be6 17. Be4 c6 18. Rd3 Rad8 19. b3 f5 20. Bf3 e4 21. Bxe4 fxe4 22. Rg3 Bxf2+ 23. Kh1 Bxg3 24. hxg3 Rd2 25. Nxe4 Rxc2 26. Ng5 Bd5 27. Re1 Rxg2 28. Re7 Rf1# 0-1

