[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "7"]
[White "Ritterfeld, Sten"]
[Black "Nicolai, Celine"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1520"]
[BlackElo "1649"]
[PlyCount "65"]
[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. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. b4 Bb6 7. a4 a6 8. Qb3 h6 9. Qa2 d6 10. h3 Ne7 11. 0-0 c5 12. bxc5 Bxc5 13. Be3 Qc7 14. d4 exd4 15. cxd4 Bb6 16. e5 Ne4 17. Nbd2 Nxd2 18. Nxd2 dxe5 19. dxe5 Bxe3 20. fxe3 Nf5 21. e6 Qc5 22. Qa3 Qxa3 23. exf7+ Kh8 24. Rxa3 g6 25. e4 Nd4 26. Nf3 Nc6 27. e5 Bf5 28. e6 Rac8 29. Rb3 Rc7 30. Re3 Ne7 31. Bb3 Kg7 32. Ne5 h5 33. g4 1-0

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "4"]
[White "Ritterfeld, Sten"]
[Black "Ingelaere, Tijl"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1520"]
[BlackElo "1136"]
[PlyCount "60"]
[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Qb3 Qxb3 7. axb3 cxd4 8. cxd4 Nge7 9. Bb5 a6 10. 0-0 Bd7 11. Bxc6 Nxc6 12. Bd2 Be7 13. Nc3 0-0 14. Ne2 f6 15. Rfc1 fxe5 16. Nxe5 Nxe5 17. dxe5 Rac8 18. Rc3 Bc5 19. Rf1 Bb5 20. Rxc5 Rxc5 21. Bb4 Rcc8 22. Bxf8 Bxe2 23. Re1 Kxf8 24. h3 Bb5 25. Re3 d4 26. Re1 d3 27. Rd1 Rc2 28. f3 d2 29. Kf2 Rxb2 30. b4 Ba4 0-1

[Event "Enschede op-C U14"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "6"]
[White "Ritterfeld, Sten"]
[Black "Van Meegen, Ruud"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1520"]
[BlackElo "1875"]
[PlyCount "62"]
[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. Nc3 e6 3. f4 d5 4. Nf3 Nf6 5. Bb5+ Bd7 6. Qe2 Be7 7. 0-0 0-0 8. Bxd7 Nbxd7 9. d3 d4 10. Nd1 b5 11. Nf2 Qb6 12. Ng5 e5 13. f5 Rac8 14. g4 c4 15. Ngh3 Rfd8 16. g5 Ne8 17. Qh5 g6 18. fxg6 fxg6 19. Qf3 Nd6 20. Ng4 Rf8 21. Qg3 Rxf1+ 22. Kxf1 Nf7 23. Bd2 cxd3 24. Qxd3 Qc6 25. Rc1 Nc5 26. Qe2 Nxe4 27. Nh6+ Nxh6 28. gxh6 Nxd2+ 29. Qxd2 Qh1+ 30. Ng1 Rf8+ 31. Ke2 Qg2+ 0-1

[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 "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "10"]
[White "Rahangmetan, Derek Jan"]
[Black "Ritterfeld, Sten"]
[Result "1-0"]
[ECO "C46"]
[WhiteElo "1200"]
[BlackElo "1073"]
[PlyCount "131"]
[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. Nc3 Bc5 4. Nxe5 d6 5. Nxc6 bxc6 6. Bc4 Qe7 7. 0-0 Be6 8. Bxe6 Qxe6 9. d4 Bb4 10. Re1 Qd7 11. a3 Ba5 12. e5 0-0-0 13. b4 Bb6 14. a4 a6 15. a5 Ba7 16. Bf4 Re8 17. d5 Ne7 18. Qd3 dxe5 19. Rxe5 Nxd5 20. Nxd5 Rxe5 21. Bxe5 cxd5 22. Bxg7 Re8 23. Qxa6+ Kb8 24. Qd3 f5 25. Bd4 Bxd4 26. Qxd4 Qe6 27. h3 Qe4 28. Qxe4 Rxe4 29. c3 Rc4 30. Rc1 d4 31. Rb1 d3 32. Kf1 Rxc3 33. Ke1 Rc2 34. Rd1 Re2+ 35. Kf1 Rb2 36. Rxd3 Rxb4 37. Ra3 Ka7 38. Rc3 Kb8 39. a6 Ra4 40. Rc6 h5 41. f3 Ra2 42. Kg1 f4 43. Kh2 h4 44. Kg1 Kc8 45. Rf6 Ra4 46. Rh6 Kd7 47. Kf2 Ra2+ 48. Kg1 c5 49. Rh7+ Kc6 50. Rxh4 Kb5 51. Rxf4 c4 52. Re4 c3 53. Re1 Kb4 54. h4 Kb3 55. h5 Rxa6 56. g4 c2 57. g5 Kb2 58. h6 c1Q 59. Rxc1 Kxc1 60. h7 Ra8 61. g6 Ra5 62. h8Q Rg5+ 63. Kf2 Rxg6 64. Qc3+ Kd1 65. Qd3+ Kc1 66. Qxg6 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "11"]
[White "Ritterfeld, Sten"]
[Black "Robertson, Olivier"]
[Result "1-0"]
[ECO "A43"]
[WhiteElo "1073"]
[BlackElo "742"]
[PlyCount "69"]
[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 e6 2. c4 c5 3. Nf3 g6 4. Ng5 Qe7 5. Ne4 d6 6. Bg5 Qc7 7. Nf6+ Nxf6 8. Bxf6 Nc6 9. Bxh8 cxd4 10. Bxd4 Nxd4 11. Qxd4 b6 12. Qe4 Bb7 13. Qc2 0-0-0 14. e4 d5 15. Bd3 b5 16. b3 bxc4 17. bxc4 dxe4 18. Bxe4 Qe5 19. Nc3 Bb4 20. 0-0 Bxe4 21. Nxe4 Rd4 22. Rab1 Ba5 23. Rb5 Qc7 24. Rc5 Rxe4 25. Rxc7+ Bxc7 26. Qxe4 f5 27. Qc6 a5 28. Rd1 Kb8 29. Rb1+ Kc8 30. Qxe6+ Kd8 31. Rd1+ Bd6 32. Qxd6+ Kc8 33. Qd7+ Kb8 34. Re1 Ka8 35. Re8# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.09"]
[Round "8"]
[White "De Ridder, Naomi"]
[Black "Ritterfeld, Sten"]
[Result "1-0"]
[ECO "C28"]
[WhiteElo "1096"]
[BlackElo "1073"]
[PlyCount "27"]
[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. Nc3 Bb4 4. Bc4 Nf6 5. d3 d6 6. 0-0 Nd4 7. Nxd4 exd4 8. Nd5 0-0 9. Bg5 Be6 10. Nxf6+ gxf6 11. Bh6 Re8 12. Bxe6 fxe6 13. Qg4+ Kf7 14. Qg7# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "2"]
[White "De Vries, Emma"]
[Black "Ritterfeld, Sten"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "1314"]
[BlackElo "1073"]
[PlyCount "113"]
[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. Bb5 a6 4. Ba4 Nf6 5. d3 Bb4+ 6. c3 Bc5 7. 0-0 b5 8. Bc2 d5 9. Nbd2 d4 10. h3 Bb7 11. Re1 dxc3 12. bxc3 b4 13. Bb2 Qd6 14. Nf1 bxc3 15. Bxc3 Bd4 16. Nxd4 exd4 17. Bd2 0-0-0 18. Ng3 Rhe8 19. Nf5 Qf8 20. Rb1 Qa3 21. Nxg7 Rg8 22. Nf5 Qxa2 23. Bb3 Qa3 24. Bxf7 Rgf8 25. Be6+ Nd7 26. Bd5 Qc5 27. Qb3 Qb6 28. Qa4 Qc5 29. Rec1 Qa7 30. Bxc6 Nc5 31. Bxb7+ Nxb7 32. Bb4 Rf7 33. Qb3 Rdd7 34. Qc4 a5 35. Bc5 Qxc5 36. Qxc5 Nxc5 37. Rxc5 a4 38. Ra5 Rd8 39. Rxa4 c5 40. Ra6 Kd7 41. Rd6+ Ke8 42. Rxd8+ Kxd8 43. Rb5 Rc7 44. e5 c4 45. Nxd4 cxd3 46. Ne6+ Kd7 47. Nxc7 Kxc7 48. Rd5 Kc6 49. Rxd3 Kc7 50. e6 Kc8 51. e7 Kc7 52. e8Q h5 53. Qxh5 Kb7 54. Qc5 Kb8 55. g4 Kb7 56. Rb3+ Ka6 57. Qb6# 1-0

[Event "Twente Young Master op-D"]
[Site "Twente"]
[Date "2007.08.06"]
[Round "1"]
[White "Ritterfeld, Sten"]
[Black "Vos, Tjark"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "1073"]
[BlackElo "1518"]
[PlyCount "76"]
[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. Nf3 d5 3. Bd3 Nf6 4. Qe2 c5 5. c4 d4 6. e5 Nfd7 7. 0-0 Nc6 8. Na3 a6 9. Bc2 Qc7 10. Ba4 Be7 11. d3 0-0 12. g3 Ncxe5 13. Nxe5 Qxe5 14. Qxe5 Nxe5 15. Bf4 Nxd3 16. b3 Nxf4 17. gxf4 Bd6 18. f5 e5 19. f6 gxf6 20. Kh1 Bf5 21. Rg1+ Kh8 22. Rae1 Rg8 23. f3 Rg6 24. h4 Rh6 25. Kg2 Rxh4 26. Rh1 Rg8+ 27. Kf2 Rxh1 28. Rxh1 Rg5 29. Be8 Kg7 30. Bxf7 Kxf7 31. Rxh7+ Bxh7 32. Ke2 Rg2+ 33. Kd1 Rxa2 34. Nb5 axb5 35. cxb5 d3 36. Ke1 c4 37. bxc4 Bb4+ 38. Kd1 Ra1# 0-1

