[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "4"]
[White "Arcilla, Maris"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "C42"]
[PlyCount "59"]
[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 Nf6 3. Nxe5 Qe7 4. d4 d6 5. Nf3 Nxe4 6. Be2 d5 7. 0-0 Qf6 8. Be3 Bd6 9. Nbd2 h6 10. Nxe4 dxe4 11. Nd2 Qe7 12. Nc4 0-0 13. Qd2 Qf6 14. f3 Qg6 15. Nxd6 cxd6 16. fxe4 Re8 17. Rf4 Bh3 18. Bf3 Bd7 19. Qe2 Nc6 20. Bh5 Qe6 21. d5 Qe5 22. dxc6 Qxb2 23. Bxf7+ Kh8 24. Raf1 Rf8 25. cxd7 Rad8 26. Be8 Rg8 27. Rf8 Qc3 28. Qf2 a5 29. Rxg8+ Kxg8 30. Qf7+ 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "9"]
[White "De Bruijn, Edwin"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "D10"]
[PlyCount "25"]
[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. c4 c6 3. Nc3 a6 4. Bf4 b6 5. e3 e6 6. Nf3 c5 7. Ne5 Qe7 8. cxd5 Bb7 9. dxe6 Qxe6 10. Bc4 Qf5 11. Nxf7 Qg6 12. dxc5 Qxg2 13. Qd8# 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "6"]
[White "Helvensteijn, M."]
[Black "De Boer, Richard"]
[Result "0-1"]
[ECO "C55"]
[PlyCount "84"]
[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 d6 3. Nc3 Nf6 4. Bc4 h6 5. d3 Nc6 6. d4 Bg4 7. dxe5 Bxf3 8. Qxf3 Nd4 9. Qd1 dxe5 10. Be3 Bc5 11. Nb5 Nxe4 12. Bxd4 Bxd4 13. Nxd4 exd4 14. Qe2 Qe7 15. f3 Nd6 16. Qxe7+ Kxe7 17. Bd3 Rhe8 18. 0-0-0 Kf8 19. Bf1 c5 20. c3 Nf5 21. g4 Ne3 22. Rd3 Rad8 23. cxd4 cxd4 24. Rb3 b6 25. Ra3 a5 26. Rb3 Re6 27. Bh3 g5 28. Kb1 d3 29. Bf1 Nxf1 30. Rxf1 d2 31. Rd1 Re1 32. Kc2 Re2 33. Rxb6 Rxh2 34. Ra6 Rd5 35. Kc3 Rf2 36. Rxh6 Rxf3+ 37. Kc4 Rfd3 38. a3 Ke7 39. b4 a4 40. b5 Kd7 41. Rh7 Kd6 42. Rxf7 R5d4# 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "3"]
[White "Helvensteijn, M."]
[Black "Hijweegen, Claudia"]
[Result "1/2-1/2"]
[ECO "C45"]
[PlyCount "52"]
[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 Nxd4 6. Bxd4 Bxd4 7. Qxd4 Nf6 8. e5 Qe7 9. Be2 Ng8 10. Nc3 d6 11. exd6 Qxd6 12. Qxg7 Qf6 13. Qxf6 Nxf6 14. Nb5 Kd8 15. 0-0-0+ Bd7 16. Bf3 Kc8 17. Nc3 Bg4 18. Rd3 c6 19. h3 Bh5 20. Bxh5 Nxh5 21. g4 Ng7 22. f4 h5 23. Rhd1 Kc7 24. Ne4 Rad8 25. Rf1 Ne6 26. Ng5 Nxg5 1/2-1/2

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "8"]
[White "Helvensteijn, M."]
[Black "Reinders, GJ."]
[Result "1-0"]
[ECO "C45"]
[PlyCount "51"]
[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 Nxd4 5. Qxd4 Nf6 6. e5 Nh5 7. g4 Nf6 8. exf6 Qxf6 9. Qxf6 gxf6 10. Nc3 a6 11. Nd5 Kd8 12. Bd2 Rg8 13. Rg1 Be7 14. Bc3 Rg5 15. Nxf6 Bxf6 16. Bxf6+ Ke8 17. Bxg5 b5 18. 0-0-0 Bb7 19. Re1+ Kf8 20. Bh6+ Kg8 21. c4 bxc4 22. Bxc4 c6 23. Re7 Rf8 24. Rge1 d5 25. Re8 dxc4 26. Rxf8# 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "1"]
[White "Helvensteijn, M."]
[Black "Van Weersel, Arlette"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "110"]
[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 Qh4 5. Nc3 Bb4 6. g3 Qxe4+ 7. Qe2 Qxe2+ 8. Ndxe2 Nf6 9. Bd2 d5 10. Nb5 Bxd2+ 11. Kxd2 Ne4+ 12. Ke1 Kd8 13. Rd1 Be6 14. Nf4 a6 15. Na3 Nb4 16. c4 Bg4 17. Be2 Bxe2 18. Kxe2 Re8 19. Kf1 Nxa2 20. Nxd5 Kc8 21. Kg2 Ra7 22. Rhe1 c6 23. Nc3 Naxc3 24. bxc3 Nf6 25. Rxe8+ Nxe8 26. Re1 Kd7 27. c5 Nf6 28. Nc4 a5 29. Ne5+ Kc8 30. Nxf7 a4 31. Nd6+ Kd7 32. Nc4 a3 33. Ra1 a2 34. Ne5+ Kc7 35. f4 b6 36. cxb6+ Kxb6 37. g4 Ne4 38. f5 Nc5 39. g5 Nb3 40. Nc4+ Kc5 41. Rxa2 Rxa2+ 42. Kg3 Kxc4 43. f6 gxf6 44. gxf6 Ra7 45. Kf4 Kxc3 46. Ke5 Kd3 47. Ke6 c5 48. h4 Nd4+ 49. Kd5 c4 50. h5 c3 51. f7 Rxf7 52. Kd6 c2 53. Kc5 c1Q+ 54. Kb4 Rb7+ 55. Ka5 Qa1# 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "5"]
[White "Kees, Maurice"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "C42"]
[PlyCount "73"]
[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 Nf6 3. Nxe5 Qe7 4. Nf3 Nxe4 5. Be2 Nc6 6. 0-0 Qf6 7. Re1 Bc5 8. Rf1 0-0 9. d3 Nd6 10. Nc3 Re8 11. Bg5 Qe6 12. Re1 f6 13. Bf4 Qe7 14. Nd5 Qd8 15. d4 Bb6 16. c3 Ne7 17. Bxd6 Nxd5 18. Bg3 c5 19. Bc4 cxd4 20. Bxd5+ Kh8 21. cxd4 Rxe1+ 22. Qxe1 Ba5 23. Qe4 d6 24. a3 f5 25. Qe3 Bd7 26. b4 Bc7 27. Bxb7 Rb8 28. Bd5 Qe8 29. Qxe8+ Rxe8 30. h3 Re2 31. Ng5 h6 32. Nf7+ Kh7 33. Nxd6 Bxd6 34. Bxd6 f4 35. Bc5 Ba4 36. Bxa7 Bb5 37. Ra2 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "2"]
[White "Ondersteijn, Niels"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "B32"]
[PlyCount "69"]
[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 Nc6 3. d4 d5 4. dxc5 dxe4 5. Qxd8+ Nxd8 6. Ng5 f6 7. Nxe4 f5 8. Ng3 e5 9. Bd3 g6 10. b3 Bxc5 11. Bb2 Bd6 12. Nd2 Nc6 13. Nc4 Nd4 14. Nxd6+ Kd7 15. Nf7 e4 16. Bb5+ Kc7 17. Bxd4 a6 18. Be2 f4 19. Nxe4 Bf5 20. Bf3 Re8 21. Bxh8 Bxe4 22. Be5+ Kd7 23. Bxe4 Ke6 24. 0-0-0 Kxf7 25. Bd5+ Ke7 26. Rhe1 Kd7 27. Bxg8+ Kc6 28. Rd6+ Kb5 29. Bc4+ Kc5 30. Bd4+ Kxd6 31. Rxe8 b5 32. Re6+ Kd7 33. Bd5 Kc7 34. Bc5 Kd7 35. Re7+ 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "7"]
[White "Van der Vlist, A."]
[Black "Helvensteijn, M."]
[Result "0-1"]
[ECO "C55"]
[PlyCount "42"]
[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 Nf6 3. Nc3 Nc6 4. Bc4 Be7 5. 0-0 0-0 6. Bb5 Nd4 7. Nxd4 exd4 8. Nd5 c6 9. Nxf6+ Bxf6 10. Bc4 Re8 11. c3 Rxe4 12. Re1 Rxe1+ 13. Qxe1 d5 14. Bf1 Qe7 15. Qd1 dxc3 16. bxc3 d4 17. c4 d3 18. a4 Bxa1 19. h3 Qe4 20. f3 Qxc4 21. Qe1 Qe6 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "8"]
[White "De Boer, Richard"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "B02"]
[PlyCount "110"]
[EventDate "1996.??.??"]
[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. d3 Nc6 3. Nc3 e6 4. Nf3 Bc5 5. d4 Bb4 6. Bd3 Bxc3+ 7. bxc3 0-0 8. 0-0 Re8 9. c4 d5 10. e5 Nd7 11. c5 Nb4 12. c3 Nxd3 13. Qxd3 f6 14. exf6 Nxf6 15. Bg5 Rf8 16. Bh4 Qe8 17. Bg3 Bd7 18. Ne5 Bb5 19. c4 dxc4 20. Nxc4 Bxc4 21. Qxc4 Ne4 22. Rfe1 Ng5 23. h4 b5 24. cxb6 Nf7 25. bxc7 Rc8 26. Rac1 Qd7 27. Rc2 Rfe8 28. Rec1 Re7 29. Qd3 Qa4 30. Qf3 e5 31. d5 e4 32. Qf5 Qd7 33. Qxd7 Rxd7 34. Rd1 Nd6 35. Bxd6 Rxd6 36. Kf1 Rd7 37. d6 Kf8 38. Ke2 Kf7 39. Ke3 Ke6 40. Kxe4 Rxd6 41. Rdc1 Rd7 42. f4 Kd6 43. Rd1+ Ke6 44. f5+ Ke7 45. Rxd7+ Kxd7 46. Ke5 Ke7 47. Kd5 Kd7 48. Ke5 Ke7 49. g4 a6 50. g5 h5 51. f6+ gxf6+ 52. gxf6+ Kf7 53. Rc6 a5 54. Kd6 Kxf6 55. Kd7+ Kf5 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "5"]
[White "Gootjes, Joost"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "C40"]
[PlyCount "133"]
[EventDate "1996.??.??"]
[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 c5 3. Bc4 Nf6 4. Nxe5 d5 5. exd5 Qe7 6. d4 cxd4 7. Qxd4 Ng4 8. Bf4 f6 9. Bb5+ Bd7 10. Bxd7+ Nxd7 11. Bd2 Qxe5+ 12. Qxe5+ fxe5 13. 0-0 Bd6 14. Nc3 0-0 15. Rae1 Ngf6 16. Re3 Bb4 17. Rg3 Nh5 18. Rg5 Ndf6 19. Rxe5 Rfe8 20. Rfe1 Bd6 21. R5e3 Kf8 22. Nb5 Rxe3 23. Rxe3 Bf4 24. Bb4+ Kg8 25. Rd3 Re8 26. g3 Bh6 27. d6 Rd8 28. Nxa7 g6 29. c4 b6 30. a4 Bf8 31. c5 bxc5 32. Bxc5 Ng7 33. b4 Ne4 34. d7 Nf6 35. Bxf8 Kxf8 36. b5 Rxd7 37. Rxd7 Nxd7 38. Nc6 Ne8 39. a5 Nc7 40. b6 Na8 41. b7 Nc7 42. Nb4 Nb8 43. f4 Kf7 44. h4 Kf6 45. g4 Kg7 46. Kg2 Kf6 47. Kg3 Ke6 48. Kf3 Kf6 49. Ke4 Ke6 50. Kd4 Kd6 51. Kc4 Nca6 52. Nxa6 Nxa6 53. Kb5 Nb8 54. a6 Kc7 55. f5 gxf5 56. gxf5 Nd7 57. h5 h6 58. Kc4 Kb6 59. Kd5 Kxa6 60. Ke6 Nf8+ 61. Kf7 Kxb7 62. Kxf8 Kc7 63. Ke7 Kc6 64. f6 Kd5 65. f7 Ke5 66. f8Q Kd5 67. Qf6 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "7"]
[White "Helvensteijn, M."]
[Black "Dannenberg, E."]
[Result "1-0"]
[ECO "C45"]
[PlyCount "43"]
[EventDate "1996.??.??"]
[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 Nxd4 5. Qxd4 Nf6 6. e5 Nh5 7. g4 Qh4 8. Be3 Bc5 9. Qxc5 Qxg4 10. Qd5 g6 11. Nc3 0-0 12. Be2 Qh3 13. 0-0-0 Ng7 14. Bd4 Ne6 15. Qf3 Qh6+ 16. Be3 Qh4 17. Qg4 Qe7 18. f4 d6 19. Nd5 Qe8 20. Nf6+ Kh8 21. Nxe8 Rxe8 22. Qg3 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "9"]
[White "Helvensteijn, M."]
[Black "Ngo, An"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "106"]
[EventDate "1996.??.??"]
[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 Bd6 4. d5 Nce7 5. Nc3 Nf6 6. Bd3 0-0 7. 0-0 b6 8. Bg5 Ng6 9. Bxf6 Qxf6 10. Nb5 c6 11. dxc6 dxc6 12. Nxd6 Qxd6 13. Be2 Rd8 14. Qxd6 Rxd6 15. Rad1 Rxd1 16. Rxd1 Bg4 17. h3 Nf4 18. Re1 Bxf3 19. Bxf3 h6 20. g3 Nxh3+ 21. Kg2 Ng5 22. Bg4 f6 23. f4 Nf7 24. Be6 Re8 25. Bb3 Kf8 26. Bxf7 Kxf7 27. a3 exf4 28. gxf4 f5 29. Kf3 fxe4+ 30. Rxe4 Rxe4 31. Kxe4 Kf6 32. c3 g5 33. fxg5+ hxg5 34. Kf3 Kf5 35. Kg3 g4 36. b3 a5 37. a4 c5 38. c4 Kg5 39. Kg2 Kf4 40. Kf2 g3+ 41. Kg2 Ke3 42. Kxg3 Kd3 43. Kf4 Kc3 44. Ke5 Kxb3 45. Kd6 Kxc4 46. Kc6 Kb4 47. Kd5 b5 48. axb5 Kxb5 49. Ke4 c4 50. Kd4 Kb4 51. Ke3 c3 52. Ke2 Kb3 53. Kd1 Kb2 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "1"]
[White "Helvensteijn, M."]
[Black "Rijnaarts, Sjef"]
[Result "0-1"]
[ECO "B30"]
[PlyCount "36"]
[EventDate "1996.??.??"]
[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 Nc6 3. Nc3 e6 4. Bc4 Nf6 5. d3 d5 6. Bb5 Be7 7. Bxc6+ bxc6 8. 0-0 0-0 9. e5 Nd7 10. d4 cxd4 11. Qxd4 Ba6 12. Re1 c5 13. Qd1 Qb6 14. Bg5 Bxg5 15. Nxg5 Qxb2 16. Na4 Qa3 17. c3 Bb5 18. Qc2 g6 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "4"]
[White "Helvensteijn, M."]
[Black "Span, Maya"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "64"]
[EventDate "1996.??.??"]
[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 Bd6 4. Bc4 exd4 5. Nxd4 Qf6 6. Be3 Qg6 7. Qf3 Nf6 8. Nc3 0-0 9. Nxc6 dxc6 10. Bd4 Re8 11. Bxf6 gxf6 12. Bd3 Bg4 13. Qe3 Bh5 14. g3 b6 15. f3 Bc5 16. Qe2 Qh6 17. g4 Bg6 18. Rf1 Qh4+ 19. Kd2 f5 20. gxf5 Bxf5 21. Rg1+ Kh8 22. Rg2 Bh3 23. Rg3 Qh6+ 24. Kd1 Rad8 25. Na4 Bc8 26. Nxc5 bxc5 27. e5 Ba6 28. Qe4 Bxd3 29. cxd3 Rd7 30. Qg4 Rxd3+ 31. Kc2 Qd2+ 32. Kb1 Qd1# 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "6"]
[White "Helvensteijn, M."]
[Black "Zonneveld, Will"]
[Result "0-1"]
[ECO "C58"]
[PlyCount "60"]
[EventDate "1996.??.??"]
[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 Nf6 4. Ng5 d5 5. exd5 Na5 6. Qe2 Nxc4 7. Qxc4 Nxd5 8. Qe2 Qxg5 9. d4 Qxc1+ 10. Qd1 Qxd1+ 11. Kxd1 exd4 12. Re1+ Be6 13. Na3 0-0-0 14. Nc4 Nc3+ 15. bxc3 dxc3+ 16. Ke2 Bxc4+ 17. Kf3 Bc5 18. g3 Rd2 19. Kf4 Rxf2+ 20. Kg4 Be6+ 21. Rxe6 fxe6 22. a4 Rxc2 23. Kh3 Rd8 24. Rf1 Rf2 25. Rxf2 Bxf2 26. a5 c2 27. a6 c1Q 28. axb7+ Kxb7 29. g4 Rd3+ 30. Kg2 Qg1# 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "3"]
[White "Keus, Herbert"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "A21"]
[PlyCount "93"]
[EventDate "1996.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Bb4 3. d4 f6 4. e3 Bxc3+ 5. bxc3 d5 6. Qf3 Ne7 7. Ba3 e4 8. Qh5+ g6 9. Bxe7 Qxe7 10. Qxd5 c6 11. Qa5 Be6 12. g3 Nd7 13. Qb4 Qxb4 14. cxb4 0-0-0 15. Nh3 Kb8 16. Nf4 Bf7 17. Rc1 Rc8 18. Bg2 f5 19. 0-0 b5 20. cxb5 cxb5 21. a3 Rxc1 22. Rxc1 Rc8 23. Rxc8+ Kxc8 24. f3 Nf6 25. Kf2 Bg8 26. Ne2 Bd5 27. Nc3 exf3 28. Nxd5 Nxd5 29. Bxf3 Nc3 30. Be2 Nxe2 31. Kxe2 Kd7 32. Kf3 Kd6 33. Kf4 Kd5 34. Kg5 Ke4 35. Kh6 Kd5 36. Kxh7 Kc4 37. Kxg6 Kb3 38. d5 Kxa3 39. d6 a5 40. d7 axb4 41. d8Q b3 42. Qa5+ Kb2 43. Qxb5 Kc2 44. Qe2+ Kc3 45. Qd1 b2 46. Qb1 Kb3 47. Kxf5 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1996.??.??"]
[Round "2"]
[White "Lahaye, Rick"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "C44"]
[PlyCount "49"]
[EventDate "1996.??.??"]
[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 Bd6 4. dxe5 Nxe5 5. Nxe5 Bxe5 6. f4 Bd6 7. Bc4 f6 8. 0-0 Ne7 9. e5 Bc5+ 10. Kh1 d5 11. exf6 gxf6 12. Qh5+ Ng6 13. Re1+ Be7 14. Bxd5 f5 15. Bb3 Qd6 16. Nc3 Bd7 17. Be3 0-0-0 18. Rad1 Nxf4 19. Bxf4 Qxf4 20. Rxe7 Bc6 21. Qe2 Be8 22. Be6+ Bd7 23. Rexd7 Rxd7 24. Rxd7 Qg5 25. Rg7+ 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "5"]
[White "Helvensteijn, M."]
[Black "De Jong, Bert"]
[Result "0-1"]
[ECO "B25"]
[PlyCount "28"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. g3 d6 3. Bg2 Nc6 4. Nf3 Nf6 5. d3 g6 6. Nc3 Bg7 7. 0-0 0-0 8. Bd2 Bg4 9. Qc1 Qd7 10. h3 Bxh3 11. Bxh3 Qxh3 12. Nh2 Ne5 13. Ne2 Nfg4 14. Nf4 Qxh2# 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "13"]
[White "Helvensteijn, M."]
[Black "Van den Berg, R."]
[Result "1-0"]
[ECO "C45"]
[PlyCount "61"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Qd3 Bb4+ 6. c3 Bc5 7. Bg5 d6 8. Nd2 Be6 9. Nxc6 bxc6 10. Qf3 d5 11. e5 Be7 12. exf6 gxf6 13. Be3 Qd7 14. Be2 c5 15. c4 c6 16. b3 d4 17. Bf4 Bf5 18. Bd3 Bg6 19. Be4 Rc8 20. a3 0-0 21. Bxg6 fxg6 22. 0-0 Rfe8 23. Rfe1 Bd6 24. Bxd6 Qxd6 25. Re2 Kf7 26. Ne4 Qe7 27. Ng5+ Kg7 28. Rxe7+ Rxe7 29. Ne4 f5 30. Nd2 Rce8 31. h3 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "1"]
[White "Van Zutphen, Amy"]
[Black "Helvensteijn, M."]
[Result "1-0"]
[ECO "B30"]
[PlyCount "51"]
[EventDate "1995.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bb5 Nf6 5. Bxc6 bxc6 6. Nxe5 d5 7. Nxc6 Qd6 8. Na5 Nxe4 9. Qe2 Bf5 10. d3 Qc7 11. Nb3 c4 12. dxe4 dxe4 13. Nd4 Bg6 14. Nxe4 Be7 15. Ng5 Rd8 16. Nb5 Qd7 17. Nc3 0-0 18. Qxc4 Qd1+ 19. Nxd1 Rd7 20. Qc6 Rfd8 21. 0-0 Rxd1 22. Qc7 Rxf1+ 23. Kxf1 Rd1+ 24. Ke2 Rd8 25. Qxe7 Rf8 26. Qxa7 1-0

