[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "6"]
[White "Brinks, Jan Willem"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B84"]
[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. Be2 Be7 8. Qd2 b5 9. a3 Bb7 10. f3 Nbd7 11. g4 Ne5 12. g5 Nfd7 13. b3 Rc8 14. f4 Nc6 15. Nxc6 Bxc6 16. Bd3 Qc7 17. Rg1 Bb7 18. Ne2 Nc5 19. Qb4 d5 20. Qd4 dxe4 21. Qxg7 Rf8 22. Bxb5+ axb5 23. Nd4 Nd7 24. Qxh7 e5 25. fxe5 Qxe5 26. g6 Qh8 27. gxf7+ Kd8 28. Ne6# 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "4"]
[White "Crefcoeur, Remco"]
[Black "Hiemstra, Sebastian"]
[Result "0-1"]
[ECO "A92"]
[PlyCount "60"]
[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 f5 2. g3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg2 0-0 6. Nf3 Nc6 7. 0-0 Kh8 8. a3 d5 9. Ne5 Nxe5 10. dxe5 Ne4 11. cxd5 Nxc3 12. bxc3 exd5 13. Qxd5 c6 14. Qb3 Bc5 15. Kh1 Qe7 16. f4 Be6 17. Qb2 Rad8 18. Bd2 Rd7 19. Rfd1 Rfd8 20. a4 Be3 21. Bxe3 Rxd1+ 22. Bg1 Qd7 23. e4 b5 24. exf5 Bxf5 25. axb5 cxb5 26. c4 a6 27. cxb5 axb5 28. Qa3 Be6 29. f5 Qd4 30. Bf1 Bd5+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "1"]
[White "Den Heeten, Djurre"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B25"]
[PlyCount "99"]
[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 c5 2. Nc3 d6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. f4 f5 7. Nf3 Nf6 8. 0-0 0-0 9. Kh1 Bd7 10. Be3 a6 11. Qd2 Qc7 12. Rae1 Rae8 13. Bg1 b6 14. e5 dxe5 15. fxe5 Ng4 16. e6 Bc8 17. Nd5 Qb8 18. c3 Nd8 19. h3 Nf6 20. Nf4 Qd6 21. Qc2 Nxe6 22. Qb3 Nh5 23. Nxh5 gxh5 24. Ng5 Rf6 25. Nxe6 Rxe6 26. Bd5 Kh8 27. Rxe6 Qxg3 28. Re3 Qd6 29. Bh2 e5 30. c4 f4 31. Bxf4 Rf8 32. Rxe5 Rxf4 33. Re8+ Rf8 34. Rexf8+ Bxf8 35. Rf7 Bg7 36. Qd1 Be6 37. Bxe6 Qxe6 38. Qf3 Kg8 39. Rf5 Qe1+ 40. Kg2 Qd2+ 41. Kg3 Qh6 42. Qa8+ Bf8 43. Qd5+ Kh8 44. Qe5+ Qg7+ 45. Kf3 Qxe5 46. Rxe5 b5 47. cxb5 axb5 48. d4 c4 49. Rxb5 Kg7 50. a4 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "9"]
[White "Hiemstra, Sebastian"]
[Black "Benning, Tijmen Jan"]
[Result "0-1"]
[ECO "C33"]
[PlyCount "60"]
[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 e5 2. f4 exf4 3. Bc4 Nf6 4. Nc3 c6 5. e5 d5 6. exd6 Bxd6 7. Qe2+ Qe7 8. Qxe7+ Kxe7 9. Nge2 Be6 10. d3 Bxc4 11. dxc4 g5 12. h4 Rg8 13. hxg5 Rxg5 14. Kf2 Ng4+ 15. Kf3 Ne5+ 16. Kf2 Bc5+ 17. Kf1 Nxc4 18. Bxf4 Rf5 19. Ke1 h5 20. Rh4 Bd6 21. b3 Ne5 22. Kd2 Nbd7 23. Rah1 Rg8 24. Nd1 Rxg2 25. Bxe5 Rxe5 26. Ne3 Rgg5 27. Ng1 Bc5 28. R4h3 Nf6 29. c4 Ne4+ 30. Ke2 Ng3+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "3"]
[White "Hiemstra, Sebastian"]
[Black "Pots, Maurice"]
[Result "0-1"]
[ECO "C18"]
[PlyCount "40"]
[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 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. Qg4 Ne7 7. Bg5 cxd4 8. b4 Qc7 9. Qxd4 Nbc6 10. Bb5 Bb6 11. Qd2 Qxe5+ 12. Nge2 Bd7 13. Bf4 Qf5 14. Bd3 Qf6 15. 0-0 a6 16. Rae1 e5 17. Bg5 Qd6 18. Na4 Bc7 19. c3 e4 20. Bc2 Qxh2# 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "7"]
[White "Hiemstra, Sebastian"]
[Black "Van Dongen, Hans"]
[Result "1-0"]
[ECO "C33"]
[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 e5 2. f4 exf4 3. Bc4 Qh4+ 4. Kf1 Nf6 5. Nc3 Bc5 6. d4 Bb6 7. Nf3 Qh5 8. Bxf4 d6 9. Qd3 Nc6 10. Re1 Bg4 11. e5 0-0-0 12. exf6 gxf6 13. Ne2 Qa5 14. c3 Bf5 15. Qd2 Be4 16. Ng3 d5 17. b4 Qa3 18. Nxe4 dxc4 19. Nxf6 Nb8 20. Ne5 Rd6 21. Nxc4 Qa6 22. Bxd6 Qxc4+ 23. Qe2 Qc6 24. Be5 Qxc3 25. Nd5 Qc6 26. Nxb6+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "2"]
[White "Hiemstra, Sebastian"]
[Black "Van Onzen, Jeroen"]
[Result "0-1"]
[ECO "B58"]
[PlyCount "60"]
[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Nc6 7. Be2 Be7 8. 0-0 0-0 9. b3 Bg4 10. h3 Bh5 11. Bg5 Bg6 12. Bxf6 Bxf6 13. Bc4 Rc8 14. Qe2 Re8 15. Nd5 Bh5 16. c3 Ne7 17. Nxf6+ gxf6 18. g4 Bg6 19. Ne1 a6 20. a4 d5 21. Rd1 Bxe4 22. Bd3 Bxd3 23. Qxd3 Ng6 24. Ng2 Re6 25. c4 d4 26. f4 Nxf4 27. Nxf4 exf4 28. Rxf4 Qb6 29. Rf3 Rce8 30. Qxd4 Rd8 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "5"]
[White "Hiemstra, Sebastian"]
[Black "Witkamp, Jarno"]
[Result "1/2-1/2"]
[ECO "B18"]
[PlyCount "80"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nf6 7. Ne5 e6 8. Nxg6 hxg6 9. Bg5 Nbd7 10. Qd2 Qb6 11. 0-0-0 0-0-0 12. Qc3 Be7 13. Bc4 Nd5 14. Qd2 Bxg5 15. Qxg5 N7f6 16. h3 Qb4 17. Bxd5 Rxd5 18. Qd2 Qa4 19. a3 e5 20. Rhe1 Rxd4 21. Qe2 Rxd1+ 22. Rxd1 Qf4+ 23. Kb1 Rd8 24. Re1 Rd2 25. Qxe5 Qxe5 26. Rxe5 Rxf2 27. Re2 Rxe2 28. Nxe2 Nd5 29. Kc1 Kd7 30. Kd2 Ke6 31. g3 Ke5 32. Kd3 f5 33. Nd4 f4 34. Nf3+ Kd6 35. g4 Ke6 36. Ke4 Kf6 37. b3 g5 38. c4 Ne3 39. Kd3 c5 40. Nd2 b6 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "8"]
[White "Weijers, Ralf"]
[Black "Hiemstra, Sebastian"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "56"]
[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 c5 2. f4 Nc6 3. Nf3 d6 4. Bc4 e6 5. 0-0 g6 6. d3 Bg7 7. c3 Nge7 8. Bb3 0-0 9. h4 Kh8 10. h5 Qe8 11. Ng5 Nd8 12. Qf3 f6 13. Nh3 Bd7 14. Kf2 Bc6 15. Rh1 Rg8 16. Qg4 d5 17. e5 Qf7 18. d4 cxd4 19. cxd4 g5 20. Bc2 gxf4 21. Bg6 Qf8 22. Bxh7 Kxh7 23. Nxf4 Bh6 24. Ng6 Nxg6 25. Bxh6 Nxe5 26. dxe5 Rxg4 27. Bxf8 fxe5 28. Nc3 Rf4+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "Soeteman, Jeroen"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B98"]
[PlyCount "37"]
[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 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nc6 10. g4 b5 11. Bxf6 Bxf6 12. Bxb5 axb5 13. Ndxb5 Qa5 14. Nxd6+ Kf8 15. e5 Bxe5 16. Qxc6 Bxf4+ 17. Kb1 Ke7 18. Rhe1 g6 19. Nd5+ 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Groot, Marjoke"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B26"]
[PlyCount "43"]
[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. Nc3 d6 3. g3 Nc6 4. Bg2 f5 5. d3 g6 6. Nge2 Nf6 7. Be3 Bg7 8. 0-0 0-0 9. h3 e6 10. Qd2 Re8 11. Rfe1 a6 12. a4 Qc7 13. Rad1 Bd7 14. exf5 exf5 15. d4 b6 16. dxc5 bxc5 17. Nd5 Nxd5 18. Qxd5+ Re6 19. Nf4 Rae8 20. Nxe6 Rxe6 21. Bxc5 Be5 22. Bxd6 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Hiemstra, Sebastian"]
[Black "Te Bokkel, Gert Jan"]
[Result "1-0"]
[ECO "C36"]
[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 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Qxd5 5. Nc3 Qd8 6. Bc4 Bd6 7. 0-0 Bg4 8. Re1+ Kf8 9. d4 Nc6 10. Nb5 Nf6 11. c3 g6 12. Qd3 Bf5 13. Qf1 Kg7 14. Ng5 Rf8 15. Bxf4 a6 16. Nxd6 cxd6 17. h3 h6 18. Nxf7 Rxf7 19. Bxh6+ Kxh6 20. Bxf7 Qd7 21. Be6 Bxe6 22. Qxf6 Bd5 23. c4 Bxc4 24. Re4 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "Hiemstra, Sebastian"]
[Black "Jongsma, Daan"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "94"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nf6 5. Bc4 Bf5 6. 0-0 e6 7. d3 c6 8. Bf4 Nbd7 9. h3 Be7 10. Nd4 Bg6 11. Bxe6 fxe6 12. Nxe6 Rc8 13. Nxg7+ Kf7 14. Re1 Rhf8 15. Ne6 Rfe8 16. Ng5+ Kg8 17. Nce4 Nxe4 18. Nxe4 Nf6 19. Ng5 Qf5 20. Ne6 Bb4 21. Re5 Rxe6 22. Rxf5 Bxf5 23. c3 Bc5 24. d4 Bb6 25. Qf3 Be4 26. Qg3+ Kf7 27. f3 Rg8 28. Qf2 Bf5 29. Kh1 Nd5 30. Be5 Rxe5 31. c4 Bd3 32. cxd5 Re2 33. Qg1 Rgxg2 34. Qxg2 Rxg2 35. Kxg2 cxd5 36. Kg3 Bf5 37. b3 Kf6 38. Re1 Bxd4 39. Rd1 Ke5 40. Re1+ Kd6 41. h4 Be5+ 42. f4 Bf6 43. h5 d4 44. Kf3 d3 45. Re8 d2 46. Ke2 Bc3 47. Rd8+ Ke7 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Van Woerden, Michiel"]
[Black "Hiemstra, Sebastian"]
[Result "0-1"]
[ECO "B80"]
[PlyCount "72"]
[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 a6 6. Be3 b5 7. a3 Bb7 8. f3 e6 9. Qd2 Be7 10. 0-0-0 Nbd7 11. g4 Ne5 12. g5 Nfd7 13. f4 Nc6 14. Bg2 Nb6 15. Nxc6 Bxc6 16. Qe2 Nc4 17. Bd4 Qa5 18. Nb1 e5 19. Bc3 Qb6 20. Rd3 exf4 21. Bxg7 Bxg5 22. Bf3 Rg8 23. Bd4 Qb7 24. Rg1 0-0-0 25. b3 Ne3 26. Nc3 f5 27. Bxe3 fxe4 28. Nxe4 Bxe4 29. Rc3+ Kd7 30. Bg4+ Ke7 31. Bd2 d5 32. Rh3 Kd6 33. Bb4+ Kc7 34. Rc3+ Kb8 35. Kb1 d4 36. Rc5 d3 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Hiemstra, Sebastian"]
[Black "Brinks, Jan Willem"]
[Result "1-0"]
[ECO "C11"]
[PlyCount "81"]
[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. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 cxd4 8. Nxd4 a6 9. Be2 Bc5 10. 0-0 Qb6 11. Na4 Qa5 12. Nxc5 Nxc5 13. c4 Ne7 14. a3 Qc7 15. Rc1 dxc4 16. Rxc4 Nd5 17. Nxe6 Bxe6 18. Rxc5 Nxe3 19. Rxc7 Nxd1 20. Bxd1 b5 21. Bf3 Kd8 22. Rxf7 Bxf7 23. Bxa8 Ke7 24. Be4 h6 25. Rd1 Rd8 26. Rxd8 Kxd8 27. Kf2 Ke7 28. Ke3 Bb3 29. g4 Ke6 30. Kd4 Bd1 31. Bf5+ Ke7 32. h4 Bb3 33. g5 hxg5 34. hxg5 Bc4 35. Be4 Bf7 36. f5 Bc4 37. Bd5 Be2 38. f6+ gxf6 39. exf6+ Kf8 40. g6 Bc4 41. g7+ 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Molenaar, Joseph"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "A85"]
[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. d4 f5 2. c4 Nf6 3. Nc3 d6 4. Qc2 e5 5. dxe5 dxe5 6. e4 Nc6 7. Nf3 Nd4 8. Nxd4 exd4 9. e5 dxc3 10. exf6 Qxf6 11. b3 Bc5 12. Bd3 0-0 13. 0-0 Bd7 14. Bf4 Bc6 15. Rfe1 Qg6 16. Bf1 Rad8 17. Be3 Bxe3 18. Rxe3 Rd2 19. Qxc3 Rfd8 20. Rg3 Qh6 21. Bd3 Be4 22. Bxe4 fxe4 23. Re1 Rxa2 24. h3 Rd3 25. Qe5 g6 26. Qxe4 Rxg3 27. Qe6+ Kg7 28. Qd7+ Kf6 29. Re6+ 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Hiemstra, Sebastian"]
[Black "Van Elteren, Jesse"]
[Result "1/2-1/2"]
[ECO "C36"]
[PlyCount "67"]
[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. f4 exf4 3. Nf3 Ne7 4. Bc4 d5 5. exd5 Nxd5 6. 0-0 Be6 7. Bxd5 Bxd5 8. Nc3 Nc6 9. d3 Bc5+ 10. Kh1 g5 11. Re1+ Be6 12. Ne4 Be7 13. b3 h6 14. Bb2 Rg8 15. c4 Qd7 16. d4 g4 17. Ng1 f5 18. Nf2 Bh4 19. Qd2 Ne7 20. Qxf4 0-0-0 21. d5 Bf7 22. Ne2 Ng6 23. Qd4 Kb8 24. Nc3 g3 25. Nd3 gxh2 26. Nc5 Qd6 27. Nb5 Qg3 28. Na6+ bxa6 29. Qxa7+ Kc8 30. Re3 axb5 31. Rxg3 Bxg3 32. Qa6+ Kd7 33. Qc6+ Kc8 34. Qa8+ 1/2-1/2

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Hiemstra, Sebastian"]
[Black "Te Bokkel, Gert Jan"]
[Result "1-0"]
[ECO "A34"]
[PlyCount "95"]
[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. c4 e5 2. Nc3 Nf6 3. e3 c5 4. Nf3 Nc6 5. d4 exd4 6. exd4 d5 7. a3 Bg4 8. Bg5 Bxf3 9. Qxf3 Nxd4 10. Qe3+ Be7 11. 0-0-0 0-0 12. Bxf6 Bxf6 13. Nxd5 Bg5 14. f4 Re8 15. Qf2 Bh6 16. Bd3 g6 17. g4 Qd6 18. h4 f6 19. g5 Bg7 20. h5 f5 21. hxg6 hxg6 22. Qh4 Kf7 23. Qf2 Rh8 24. Rhe1 Rae8 25. Rxe8 Rxe8 26. Re1 Rxe1+ 27. Qxe1 Qe6 28. Qh1 b5 29. cxb5 Ne2+ 30. Kd2 Nd4 31. Bc4 Kf8 32. Ne3 Nb3+ 33. Bxb3 Qxb3 34. Qa8+ Kf7 35. Qxa7+ Kg8 36. Qxc5 Qxb2+ 37. Nc2 Bf8 38. Qd5+ Kh8 39. Qe5+ Qxe5 40. fxe5 Be7 41. b6 Bxg5+ 42. Kd3 Bd8 43. e6 Kg7 44. b7 Bc7 45. Nd4 Kf6 46. a4 Ke7 47. Kc4 Bb8 48. Nc6+ 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Hiemstra, Sebastian"]
[Black "Pot, Erik"]
[Result "1/2-1/2"]
[ECO "A43"]
[PlyCount "79"]
[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. c4 e6 2. d4 c5 3. d5 exd5 4. cxd5 d6 5. e4 g6 6. Nc3 Bg7 7. Bd3 Ne7 8. Nge2 a6 9. a4 0-0 10. 0-0 Nd7 11. Bg5 Ne5 12. b3 Qc7 13. Rc1 f5 14. f3 fxe4 15. fxe4 Bg4 16. Qd2 Rae8 17. Bc4 Nc8 18. h3 Bxh3 19. gxh3 Nf3+ 20. Rxf3 Rxf3 21. Kg2 Ref8 22. Nf4 h6 23. Kxf3 hxg5 24. Nce2 gxf4 25. Rg1 Qf7 26. Rg4 Be5 27. Nc1 Qf6 28. Nd3 Ne7 29. Nxc5 dxc5 30. d6+ Kg7 31. dxe7 Qxe7 32. Qg2 Qf6 33. Rg5 Bd6 34. e5 Bxe5 35. Bd3 Qc6+ 36. Be4 Qd7 37. Rxe5 Qd1+ 38. Kf2 Qd4+ 39. Kf1 Qa1+ 40. Kf2 1/2-1/2

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Van Run, Jan"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "A03"]
[PlyCount "87"]
[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. b3 d5 2. Bb2 c5 3. e3 Nc6 4. f4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. 0-0 Be7 8. Na3 a6 9. c4 0-0 10. Qe1 Ne4 11. d3 Bf6 12. Ne5 Bxe2 13. Qxe2 Nd6 14. cxd5 exd5 15. Rac1 Be7 16. Rxc5 Nc4 17. Rxc6 Nxb2 18. Qxb2 bxc6 19. Nxc6 Qd6 20. Nxe7+ Qxe7 21. Nc2 Rac8 22. Rf3 Rc7 23. Rg3 f6 24. Nd4 Rfc8 25. h3 Qb4 26. Nf5 Kf8 27. Nxg7 Rc1+ 28. Kh2 Kf7 29. Nh5 d4 30. Rg7+ Ke6 31. f5+ Kd6 32. Qf2 Qb8 33. exd4 Kc6+ 34. Ng3 Rg8 35. d5+ Kxd5 36. Rxg8 Qc7 37. Rg4 Qe5 38. Qf3+ Kc5 39. b4+ Kb6 40. Re4 Qc7 41. Re6+ Kb5 42. Qd5+ Ka4 43. Rxa6+ Kxb4 44. a3+ 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Huistra, Heikel"]
[Black "Hiemstra, Sebastian"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "120"]
[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 c5 2. e4 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a4 e5 7. Nf3 Bb4 8. Bc4 0-0 9. Bg5 Bxc3+ 10. bxc3 d6 11. 0-0 Qe7 12. Qd3 Be6 13. Rfd1 Bxc4 14. Qxc4 Rfd8 15. Rd3 h6 16. Bh4 Rd7 17. Rad1 Rad8 18. Bg3 Rc7 19. Bh4 Rcd7 20. h3 Qe6 21. Qb3 Ne7 22. Bxf6 Qxf6 23. c4 Qe6 24. Qc3 Nc6 25. Kh1 f6 26. Re3 Rc8 27. Qd3 Ne7 28. Qb3 Qxc4 29. Rc3 Qxb3 30. Rxc8+ Nxc8 31. cxb3 Rc7 32. Nh4 Kf7 33. Rd3 Rd7 34. Nf5 h5 35. Rg3 g6 36. Nh4 g5 37. Nf5 Ne7 38. Ne3 Ke6 39. Nc4 d5 40. exd5+ Rxd5 41. Rf3 b5 42. axb5 axb5 43. Ne3 Rd3 44. Nf1 Rxf3 45. gxf3 Nd5 46. Kg2 h4 47. Nd2 Kd6 48. Ne4+ Ke6 49. Nc5+ Kf5 50. Ne4 b4 51. Nd6+ Ke6 52. Ne4 Nf4+ 53. Kh2 Nd3 54. Kg1 Nc1 55. Nd2 f5 56. Kf1 Kd5 57. Ke1 Nd3+ 58. Kf1 Nf4 59. Nc4 Nxh3 60. Ne3+ Kd4 0-1

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "Hiemstra, Sebastian"]
[Black "Nieuwenbroek, Mark"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "58"]
[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. c4 e5 2. Nc3 Nc6 3. e3 Nf6 4. d4 exd4 5. exd4 d5 6. Nf3 Bg4 7. cxd5 Nxd5 8. Bb5 Bb4 9. Qe2+ Nde7 10. Bxc6+ bxc6 11. a3 Bd6 12. b4 0-0 13. 0-0 Nf5 14. Bg5 Bxf3 15. Bxd8 Bxe2 16. Bxc7 Bxf1 17. Bxd6 Nxd6 18. Kxf1 Nb5 19. Nxb5 cxb5 20. Ke2 Rad8 21. Rd1 Rfe8+ 22. Kf3 h6 23. Kf4 Re2 24. Kf3 Ra2 25. Rd3 Kf8 26. h4 a6 27. g4 Rc8 28. Ke3 Rc1 29. f3 Rca1 0-1

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Snuverink, Michiel"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "49"]
[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 b6 2. d4 Bb7 3. Nc3 e6 4. f4 Bb4 5. Bd3 Nf6 6. Qe2 Nc6 7. Nf3 d6 8. Bd2 Qd7 9. 0-0 0-0-0 10. a3 Bxc3 11. bxc3 h5 12. a4 h4 13. Rfb1 Rdg8 14. a5 d5 15. axb6 axb6 16. Ba6 Bxa6 17. Rxa6 Kd8 18. exd5 exd5 19. Ra8+ Qc8 20. Rxc8+ Kxc8 21. Qb5 Ne7 22. Ra1 Kd8 23. Ne5 Rf8 24. c4 Nc8 25. Bb4 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Blom, Gerben"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "67"]
[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. Nc3 Nc6 3. Nge2 Nf6 4. d4 cxd4 5. Nxd4 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 Be6 11. Bd3 Bxd5 12. exd5 Qa5+ 13. c3 b4 14. dxc6 bxa3 15. b4 Qd5 16. Qf3 Qxf3 17. gxf3 Ke7 18. Bc4 Bh6 19. Rg1 Bf4 20. Rg7 Raf8 21. Bxa6 Bh6 22. Rg1 Ra8 23. Bc4 Rhc8 24. Bd5 Rab8 25. Rb1 Rg8 26. Rxg8 Rxg8 27. Ke2 Rb8 28. b5 Rb6 29. Kd1 f5 30. Rb3 Bf4 31. h3 e4 32. fxe4 fxe4 33. Bxe4 Ke6 34. Bf5+ 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Hiemstra, Sebastian"]
[Black "Groot, Marjoke"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "111"]
[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. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. g3 Bg7 5. Bg2 d6 6. 0-0 Nf6 7. d3 Bd7 8. Bd2 0-0 9. Qc1 Re8 10. Bh6 Bh8 11. a3 Rb8 12. Rb1 a6 13. b4 cxb4 14. axb4 Ng4 15. Bd2 Nge5 16. Nxe5 Nxe5 17. c5 Bf5 18. Rb3 Qd7 19. Nd5 Be6 20. Nb6 Qb5 21. Ra3 Red8 22. f4 dxc5 23. Qxc5 Qxc5+ 24. bxc5 Nd7 25. Nxd7 Rxd7 26. Bc3 Rc7 27. Bxh8 Kxh8 28. d4 Bc4 29. Bf3 Rd8 30. Rd1 Bb5 31. e3 f6 32. Rc3 Kg7 33. Rdc1 Re8 34. Kf2 Kf7 35. c6 b6 36. Be2 Bxe2 37. Kxe2 Ke6 38. e4 Rd8 39. d5+ Kd6 40. Rd1 b5 41. Ke3 Ra7 42. Kd4 b4 43. Rb3 a5 44. e5+ fxe5+ 45. fxe5+ Kc7 46. Kc5 Ra6 47. d6+ exd6+ 48. exd6+ Kc8 49. Kb5 a4 50. Rxb4 Ra8 51. Rxa4 Rb8+ 52. Kc5 Rf8 53. d7+ Kd8 54. Rf4 Rg8 55. Kd6 Rb6 56. Rb1 1-0

[Event "NED U20 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Hiemstra, Sebastian"]
[Black "Van Zutphen, Jimmy"]
[Result "1/2-1/2"]
[ECO "D85"]
[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. c4 Nf6 2. d4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 Bg7 8. Bb5+ Bd7 9. Bxd7+ Qxd7 10. 0-0 0-0 11. Be3 cxd4 12. cxd4 Nc6 13. Qd2 Rfd8 14. Rad1 b6 15. d5 Na5 16. Bd4 f6 17. Bc3 Nc4 18. Qd3 Rac8 19. Nd4 Ne5 20. Qd2 Qg4 21. f3 Qh5 22. Ne6 Bh6 23. Qe2 Re8 24. Bd2 Rc2 25. Qb5 Rec8 26. Rc1 Kf7 27. Rxc2 Rxc2 28. Bxh6 Qxh6 29. f4 Ng4 30. Nd8+ Kf8 31. Ne6+ 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "1"]
[White "Ammerlaan, Richard"]
[Black "Hiemstra, Sebastian"]
[Result "1/2-1/2"]
[ECO "A47"]
[PlyCount "115"]
[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 b6 2. Nf3 Bb7 3. g3 e6 4. Bg2 c5 5. c3 Nf6 6. 0-0 cxd4 7. cxd4 Bd6 8. Nc3 0-0 9. Nb5 Be7 10. Bf4 Na6 11. a3 Bc6 12. Qb3 Bxb5 13. Qxb5 Nc7 14. Bxc7 Qxc7 15. Rac1 Qd8 16. Rc2 Rc8 17. Rfc1 Rxc2 18. Rxc2 Qb8 19. e3 Rc8 20. Qd3 Rc7 21. Nd2 Qc8 22. Rxc7 Qxc7 23. Qc4 Qxc4 24. Nxc4 d5 25. Ne5 Bd6 26. Nd3 a5 27. h3 Kf8 28. Kf1 Ke7 29. Ke2 Kd7 30. Nf4 Kc6 31. Kd3 Kb5 32. Kc3 h6 33. Bf1+ Kc6 34. Bd3 g5 35. Ne2 Ne4+ 36. Bxe4 dxe4 37. a4 Bb4+ 38. Kc2 Be1 39. Nc3 f5 40. g4 Bxf2 41. gxf5 exf5 42. Kd2 f4 43. d5+ Kd6 44. Nxe4+ Kxd5 45. Nxf2 fxe3+ 46. Kxe3 Kc4 47. Ng4 h5 48. Ne5+ Kb3 49. Nd3 Kxa4 50. Kd2 Kb3 51. Kc1 g4 52. hxg4 hxg4 53. Nf4 g3 54. Ng2 Ka2 55. Kc2 b5 56. b3 a4 57. bxa4 bxa4 58. Ne3 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "6"]
[White "Hiemstra, Sebastian"]
[Black "Allamehzadeh, S."]
[Result "1-0"]
[ECO "A01"]
[PlyCount "113"]
[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. b3 e5 2. Bb2 Nc6 3. Nf3 Nf6 4. Nxe5 Nxe5 5. Bxe5 Be7 6. Nc3 0-0 7. Nb5 d6 8. Bb2 Bd7 9. e3 a6 10. Nd4 d5 11. c4 dxc4 12. Bxc4 Ng4 13. h3 Ne5 14. Qc2 Nxc4 15. Qxc4 Bf6 16. 0-0 Re8 17. Rac1 Rc8 18. Bc3 Be6 19. Nxe6 Rxe6 20. Bxf6 Qxf6 21. Qd5 c6 22. Qd7 Rb8 23. Rc4 h6 24. Rf4 Re7 25. Qd4 Qxd4 26. Rxd4 Re5 27. Rc1 Rbe8 28. Rb4 R8e7 29. d4 Rg5 30. Rc5 Rxc5 31. dxc5 Kf8 32. Rd4 Ke8 33. Kf1 Rd7 34. Ke2 Kd8 35. Kd3 Kc7 36. Rxd7+ Kxd7 37. Ke4 Ke6 38. f4 f5+ 39. Kd4 g6 40. e4 h5 41. g3 Kf6 42. h4 Ke6 43. e5 Kd7 44. Kc4 Kc7 45. a4 Kd7 46. b4 Kc7 47. b5 a5 48. bxc6 Kxc6 49. e6 b6 50. cxb6 Kxb6 51. Kd5 Kc7 52. Ke5 Kd8 53. Kf6 Ke8 54. Kxg6 Ke7 55. Kxf5 Ke8 56. Ke5 Ke7 57. f5 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "4"]
[White "Hiemstra, Sebastian"]
[Black "Lieven, Menno"]
[Result "0-1"]
[ECO "C20"]
[PlyCount "70"]
[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. b3 Bc5 3. Bb2 d6 4. Nf3 Nf6 5. d3 c6 6. Be2 Qb6 7. 0-0 Ng4 8. d4 exd4 9. Nxd4 Nf6 10. a3 d5 11. exd5 Nxd5 12. Re1 0-0 13. Bd3 Nd7 14. b4 Nxb4 15. axb4 Bxd4 16. Bxd4 Qxb4 17. Nc3 g6 18. Ra4 Qd6 19. Ne4 Qc7 20. Bxa7 b6 21. Qa1 Bb7 22. c4 c5 23. Nc3 Rfe8 24. Rxe8+ Rxe8 25. Nd5 Qd6 26. Ra2 Bxd5 27. cxd5 Qxd5 28. Re2 Ra8 29. Rd2 Ne5 30. Qc3 Rxa7 31. Bc4 Qe4 32. h3 Rd7 33. Re2 Rd1+ 34. Kh2 Qf4+ 35. g3 Nf3+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "9"]
[White "Hiemstra, Sebastian"]
[Black "Thoolen, Fien"]
[Result "1-0"]
[ECO "A01"]
[PlyCount "89"]
[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. b3 e5 2. Bb2 Nc6 3. e3 d5 4. Nf3 f6 5. c4 e4 6. Nd4 Nxd4 7. Bxd4 c6 8. d3 exd3 9. Bxd3 Bb4+ 10. Nc3 Ne7 11. a3 Ba5 12. b4 Bc7 13. 0-0 0-0 14. Qc2 g6 15. Rad1 Qd6 16. g3 Bh3 17. Rfe1 Nf5 18. Bf1 Bxf1 19. Rxf1 Nh4 20. f3 Nf5 21. Bc5 Qe5 22. e4 Nd6 23. cxd5 Nc4 24. dxc6 b6 25. Nd5 Nxa3 26. Qb3 bxc5 27. Nxc7+ Kh8 28. Nxa8 Nb5 29. c7 Nxc7 30. Nxc7 Qxc7 31. Rc1 Rd8 32. Rfd1 Rxd1+ 33. Rxd1 c4 34. Qc3 Kg7 35. Rd4 Qb6 36. Qxc4 a6 37. Kg2 Kh6 38. Qc5 Qb7 39. Rd5 Qb8 40. h4 Qa8 41. g4 Qe8 42. g5+ Kg7 43. Qc7+ Qe7 44. Qxe7+ Kh8 45. Qf8# 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "2"]
[White "Hiemstra, Sebastian"]
[Black "Van der Aalst, Paul"]
[Result "0-1"]
[ECO "A01"]
[PlyCount "88"]
[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. b3 e5 2. Bb2 Nc6 3. e3 d5 4. g3 Bd6 5. Bg2 Nge7 6. Ne2 Be6 7. 0-0 0-0 8. Nbc3 a6 9. d4 e4 10. a3 Bg4 11. f3 exf3 12. Bxf3 Bxf3 13. Rxf3 f5 14. Qd3 g6 15. Na4 b6 16. c4 Qd7 17. Nac3 Be5 18. Nxd5 Nxd5 19. dxe5 Nf6 20. Qc3 Ne4 21. Qc2 Qd2 22. Rc1 Rad8 23. Bc3 Nxc3 24. Nxc3 Nxe5 25. Rf2 Qxe3 26. Kf1 Nd3 27. Re2 Qxc1+ 28. Qxc1 Nxc1 29. Rb2 Nd3 30. Rd2 Nc5 31. Rb2 Rd3 32. Nd5 Rxb3 33. Rxb3 Nxb3 34. Nxc7 Rc8 35. Nd5 Rxc4 36. Nxb6 Na5 37. Ke2 Rc3 38. a4 Rc4 39. Kd3 Rb4 40. Nd5 Rxa4 41. Kc3 Ra2 42. Nb4 Ra3+ 43. Kb2 Nc4+ 44. Kb1 Rb3+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "7"]
[White "Hiemstra, Sebastian"]
[Black "Wezenaar, Femke"]
[Result "1-0"]
[ECO "A01"]
[PlyCount "43"]
[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. b3 Nc6 2. Bb2 e5 3. e3 a6 4. Nf3 e4 5. Nd4 Nxd4 6. Bxd4 d5 7. Nc3 Be6 8. d3 Bb4 9. a3 Bxc3+ 10. Bxc3 Nf6 11. Be2 0-0 12. 0-0 c6 13. Bb2 Re8 14. dxe4 Nxe4 15. Qd4 Qg5 16. c4 Bh3 17. Bf3 Rad8 18. Rad1 Re5 19. Qxe5 f5 20. cxd5 Rf8 21. Bxe4 Rf6 22. Qg3 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "3"]
[White "Kuijvenhoven, Vincent"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "55"]
[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 b6 2. d4 Bb7 3. Nc3 e6 4. Nf3 Nf6 5. e5 Nd5 6. Nxd5 Bxd5 7. c4 Bb7 8. Be2 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 0-0 11. 0-0 d5 12. b3 Qe7 13. Rac1 Nd7 14. cxd5 Bxd5 15. Rxc7 Qd8 16. Rc3 a6 17. Rfc1 Qb8 18. Qd3 Rd8 19. Ng5 g6 20. Qh3 Nf8 21. Bf3 Qb7 22. Rc7 Qb8 23. Bxd5 exd5 24. Qf3 f5 25. exf6 Ra7 26. f7+ Kg7 27. Ne6+ Nxe6 28. f8Q# 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "5"]
[White "Perluka, Peter"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "A02"]
[PlyCount "117"]
[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. f4 b6 2. Nf3 Bb7 3. e3 e6 4. b3 Nf6 5. Bb2 Bd6 6. Be2 0-0 7. 0-0 Nc6 8. Ne5 Re8 9. d3 Bc5 10. Qd2 d6 11. Nxc6 Bxc6 12. b4 Bxe3+ 13. Qxe3 Nd5 14. Qg3 f6 15. a3 Ne7 16. Nd2 Nf5 17. Qf2 Qd7 18. Bf3 Bxf3 19. Nxf3 e5 20. fxe5 dxe5 21. Nxe5 fxe5 22. Qxf5 Qxf5 23. Rxf5 e4 24. dxe4 Rxe4 25. Raf1 Re2 26. Rf7 Rxc2 27. Rxg7+ Kh8 28. Rxc7+ Rxb2 29. Rcf7 Ra2 30. Rf8+ Rxf8 31. Rxf8+ Kg7 32. Rf3 a5 33. bxa5 bxa5 34. h4 Kg6 35. Kh2 h6 36. Kh3 a4 37. g3 Rb2 38. Rf4 Rb3 39. Rxa4 h5 40. Ra5 Rb6 41. Rg5+ Kh6 42. a4 Ra6 43. a5 Rc6 44. Rb5 Rc7 45. Rb6+ Kg7 46. a6 Rc8 47. Rb7+ Kg6 48. a7 Ra8 49. Kg2 Kf6 50. Kf3 Ke5 51. Ke3 Kf5 52. Kf3 Kg6 53. Kf4 Rf8+ 54. Ke5 Re8+ 55. Kd6 Ra8 56. Kc6 Kf5 57. Kb6 Kg4 58. Rg7+ Kh3 59. Kb7 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "8"]
[White "Stiepel, Hannes"]
[Black "Hiemstra, Sebastian"]
[Result "1-0"]
[ECO "B00"]
[PlyCount "119"]
[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 b6 2. d4 Bb7 3. Bd3 e6 4. Nf3 c5 5. 0-0 Nc6 6. c3 Bd6 7. Be3 cxd4 8. Nxd4 Nge7 9. f4 a6 10. Qg4 0-0 11. f5 Ne5 12. Qe2 Nxd3 13. Qxd3 Qc7 14. h3 exf5 15. Nxf5 Nxf5 16. exf5 Qc6 17. Rf2 Rfe8 18. Nd2 Re5 19. Nf3 Re7 20. Bd4 Bc5 21. Rd1 Rae8 22. Kf1 a5 23. Ng5 Qc8 24. f6 Ba6 25. c4 Bxc4 26. Qxc4 gxf6 27. Rxf6 Bxd4 28. Qxd4 b5 29. Kg1 Qc2 30. Qd3 Re1+ 31. Kh2 Qc7+ 32. Rd6 f5 33. Qd5+ R8e6 34. Nxe6 dxe6 35. Qa8+ Kf7 36. Qd8 Qxd8 37. Rxd8 Re2 38. R1d2 Re4 39. Rb8 Re5 40. Rd7+ Kf6 41. Rxh7 Re4 42. Rhb7 b4 43. Rb5 Re2 44. Rxa5 Rxb2 45. Ra6 f4 46. Rbb6 Re2 47. Rxb4 Kf5 48. Raa4 e5 49. Ra8 e4 50. Rf8+ Kg5 51. Rb5+ Kg6 52. Rxf4 e3 53. Rc4 Kf6 54. Rc6+ Ke7 55. Rb7+ Kd8 56. Rh6 Kc8 57. Rf7 Rd2 58. Rh8+ Rd8 59. Rxd8+ Kxd8 60. Kg3 1-0

