[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.09"]
[Round "9"]
[White "Groenhuis, Vincent"]
[Black "Van Dommelen, Martin"]
[Result "1-0"]
[ECO "B09"]
[PlyCount "113"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 g6 2. d4 d6 3. Nc3 Bg7 4. f4 Nd7 5. Nf3 Ngf6 6. Bc4 0-0 7. e5 Ne8 8. e6 Nb6 9. exf7+ Rxf7 10. Bxf7+ Kxf7 11. 0-0 c6 12. b3 Kg8 13. Bb2 Nf6 14. Qe2 Nh5 15. g3 Bg4 16. Ne4 Qd7 17. Nf2 Nd5 18. Rae1 Rf8 19. Nxg4 Ndxf4 20. Qxe7 Qxg4 21. Qh4 Nh3+ 22. Kg2 N3f4+ 23. Kh1 Qxh4 24. Nxh4 Nd5 25. Rxf8+ Bxf8 26. a3 Ng7 27. Nf3 Nc7 28. Kg2 Nf5 29. g4 Nh6 30. Kg3 Nf7 31. Bc1 d5 32. Bf4 Nd6 33. a4 Nce8 34. Nd2 Nf6 35. Be5 Nde8 36. h4 Bb4 37. Bxf6 Nxf6 38. Rf1 Nd7 39. Nf3 Bd6+ 40. Kg2 h6 41. Re1 Kf7 42. Rf1 Ke6 43. g5 h5 44. Ne5 Bxe5 45. dxe5 Nxe5 46. Rf8 c5 47. Kf2 c4 48. bxc4 dxc4 49. Ke3 a6 50. Ke4 Nd7 51. Re8+ Kf7 52. Rc8 b5 53. a5 Ke7 54. Kd5 Nf8 55. Rc6 Nd7 56. Rxg6 b4 57. Rg7+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "7"]
[White "Groenhuis, Vincent"]
[Black "Welling, Wouter"]
[Result "1/2-1/2"]
[ECO "B80"]
[PlyCount "137"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. f3 e6 7. Be3 Be7 8. Qd2 a6 9. g4 0-0 10. 0-0-0 Nxd4 11. Qxd4 Nd7 12. h4 b5 13. g5 Qa5 14. Kb1 Bb7 15. Rg1 Ne5 16. Rg3 Rac8 17. h5 b4 18. Ne2 Rc4 19. Qb6 Qxb6 20. Bxb6 Nd7 21. Be3 Rfc8 22. Nd4 R4c7 23. Bh3 Nc5 24. Rdg1 g6 25. Bg4 Re8 26. Rh1 Bf8 27. Ne2 e5 28. hxg6 hxg6 29. Rgh3 Bg7 30. Rd1 Rd8 31. c4 a5 32. b3 Rc6 33. Rhh1 a4 34. Kb2 Ba6 35. Ng3 Bf8 36. Rd2 Ra8 37. Bxc5 Rxc5 38. Rd5 a3+ 39. Kc2 Bb7 40. Rxc5 dxc5 41. Rd1 Bc6 42. Bd7 Ra6 43. Bxc6 Rxc6 44. Rd7 Re6 45. Rc7 Be7 46. Rc8+ Kg7 47. Ne2 Bxg5 48. Rxc5 Rd6 49. Rd5 Rxd5 50. cxd5 f5 51. Kd3 Be7 52. Ng3 Bh4 53. Nf1 Be7 54. Ne3 Kf6 55. Nc4 Bc5 56. Ke2 g5 57. Kd3 g4 58. Ke2 g3 59. Kf1 fxe4 60. fxe4 Kg5 61. Nxe5 Kf4 62. Nd3+ Kxe4 63. Nxc5+ Kxd5 64. Na6 Kd4 65. Nxb4 Kc3 66. Na6 Kb2 67. Nb4 Kc3 68. Nc6 Kb2 69. Nb4 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "8"]
[White "Vanlerberghe, Filip"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "A53"]
[WhiteElo "2103"]
[PlyCount "98"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 d6 3. e3 Nf6 4. d4 exd4 5. exd4 Be7 6. g3 0-0 7. Bg2 c6 8. d5 Bf5 9. Nge2 Qd7 10. Nf4 Re8 11. 0-0 c5 12. Re1 Na6 13. a3 Bf8 14. Rxe8 Rxe8 15. Bd2 g6 16. Qf1 Bg7 17. Re1 Nc7 18. Rxe8+ Ncxe8 19. Bh3 Ng4 20. Bxg4 Bxg4 21. f3 Bd4+ 22. Kh1 Bf5 23. g4 Bc2 24. Qc1 Bb3 25. Nce2 Bg7 26. Ng3 Qa4 27. Bc3 Qxc4 28. Qe3 Ba4 29. Bxg7 Kxg7 30. h4 Nf6 31. h5 Nxd5 32. h6+ Kf8 33. Nxd5 Qxd5 34. Qc3 Qe5 35. Qxe5 dxe5 36. Ne4 g5 37. Nxg5 Bc2 38. Kg2 Ke7 39. Kg3 f6 40. Nh3 b5 41. g5 a5 42. f4 b4 43. Kf3 c4 44. axb4 axb4 45. gxf6+ Kxf6 46. Ke3 c3 47. bxc3 b3 48. fxe5+ Kxe5 49. Kd2 Bf5 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.07"]
[Round "6"]
[White "Offringa, Tjaart Jan"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "E81"]
[PlyCount "73"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 Bg7 4. e4 d6 5. Nc3 Nc6 6. Nge2 0-0 7. Bg5 Ne8 8. g4 f6 9. Be3 e5 10. d5 Ne7 11. Qd2 a6 12. a4 c6 13. h4 Rb8 14. a5 Bd7 15. Nc1 f5 16. g5 cxd5 17. cxd5 fxe4 18. fxe4 Rf7 19. Qh2 Nc7 20. h5 Bh8 21. h6 Rc8 22. Bb6 Qf8 23. Bh3 Bxh3 24. Qxh3 Nb5 25. Nxb5 axb5 26. b3 Rf4 27. Qe6+ Qf7 28. Qxf7+ Kxf7 29. Rf1 Ke8 30. Rxf4 exf4 31. Rb1 Rc2 32. Nd3 f3 33. Rc1 Re2+ 34. Kf1 Rxe4 35. Rc7 Nxd5 36. Rc8+ Kd7 37. Rxh8 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "5"]
[White "Groenhuis, Vincent"]
[Black "Brandenburg, Rik"]
[Result "1-0"]
[ECO "B79"]
[PlyCount "73"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. f3 Nc6 8. Be3 0-0 9. Qd2 Bd7 10. 0-0-0 Qa5 11. Kb1 Rfc8 12. Bb3 Ne5 13. g4 Nc4 14. Bxc4 Rxc4 15. Nb3 Qc7 16. g5 Nh5 17. Nd5 Qd8 18. Nd4 Be6 19. c3 Qd7 20. Nf4 Nxf4 21. Bxf4 b5 22. Nxe6 Qxe6 23. h4 a5 24. Qd5 Qc8 25. Rc1 Rb8 26. Bd2 Rc5 27. Qd3 Qe6 28. h5 b4 29. hxg6 hxg6 30. Ka1 Rcb5 31. c4 Rc5 32. Be3 Qe5 33. Rc2 Rc6 34. f4 Qe6 35. Bd4 f5 36. Bxg7 Kxg7 37. Qd4+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "4"]
[White "Soerdjan, Kiran"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "90"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. Be3 a6 10. Nc3 Be7 11. Qd2 f5 12. f3 0-0 13. 0-0-0 b5 14. h3 Bb7 15. g4 f4 16. Bf2 Qa5 17. Kb1 Nd7 18. g5 Rfc8 19. h4 Nb6 20. Bxb6 Qxb6 21. Ne4 a5 22. Bh3 Rc7 23. Be6+ Kh8 24. g6 Bc8 25. Ng5 Bxe6 26. Nxe6 h6 27. Nxc7 Qxc7 28. Qd3 Qd7 29. Qf1 Rc8 30. Rc1 a4 31. a3 Qb7 32. Qd3 Rc5 33. Rcd1 b4 34. h5 Rc3 35. Qd2 Rxa3 36. Rhf1 Rc3 37. Qc1 Rc5 38. Qd2 a3 39. Qc1 Bf6 40. bxa3 e4 41. fxe4 bxa3+ 42. Ka2 Rb5 43. c3 Rb2+ 44. Ka1 Qb3 45. Qb1 Bxc3 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "3"]
[White "Groenhuis, Vincent"]
[Black "Van Putten, Bart J"]
[Result "0-1"]
[ECO "B01"]
[PlyCount "38"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Be7 7. c4 Nb6 8. Nc3 0-0 9. Be3 Nc6 10. Qd2 Bxf3 11. gxf3 f5 12. Rad1 Rf6 13. Kh1 Rg6 14. Rg1 Qe8 15. Bf4 Rd8 16. Rxg6 Qxg6 17. Rg1 Qf7 18. Be3 f4 19. Bxf4 Rxd4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "2"]
[White "Tonoli, Benjamin"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "A36"]
[PlyCount "99"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 Nf6 6. Nge2 e6 7. d3 d6 8. 0-0 a6 9. Rb1 Bd7 10. h3 h5 11. Be3 h4 12. g4 Qc7 13. b3 0-0-0 14. d4 b6 15. Na4 e5 16. d5 Nd4 17. Nxd4 cxd4 18. Bd2 Kb7 19. Qc2 Qc8 20. f3 Ne8 21. Rfc1 Bh6 22. Bxh6 Rxh6 23. b4 Bxa4 24. Qxa4 Qd7 25. Qa3 Ka7 26. c5 b5 27. Bf1 Rb8 28. Qb3 Rh8 29. Ra1 Nc7 30. a4 dxc5 31. bxc5 bxa4 32. Qxa4 Qxa4 33. Rxa4 Rhc8 34. Rca1 Kb7 35. c6+ Kb6 36. d6 Kxc6 37. dxc7 Kxc7 38. Bxa6 Rd8 39. R4a3 Rb2 40. R1a2 Rb1+ 41. Kf2 Rh1 42. Kg2 Rd1 43. Rc2+ Kd6 44. Be2 Re1 45. Ra6+ Ke7 46. Rc7+ Ke8 47. Kf2 Rh1 48. Bf1 d3 49. Ra1 d2 50. Rd1 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.04"]
[Round "1"]
[White "Groenhuis, Vincent"]
[Black "Crefcoeur, Remco"]
[Result "1-0"]
[ECO "B87"]
[PlyCount "85"]
[EventDate "2003.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. f3 Be7 9. Be3 0-0 10. Qd2 Bb7 11. 0-0-0 Nbd7 12. g4 Nc5 13. g5 Nxb3+ 14. Nxb3 Nd7 15. h4 Ne5 16. Qf2 Nc4 17. Rdg1 b4 18. Nd1 Nxe3 19. Qxe3 a5 20. h5 a4 21. Nd4 Qb6 22. g6 e5 23. Nf5 Qxe3+ 24. Ndxe3 Bf6 25. Nxd6 Ba6 26. gxf7+ Kh8 27. h6 g6 28. Nd5 Bd8 29. f4 exf4 30. Rg4 Ra7 31. Rhg1 Rd7 32. e5 f3 33. Rf4 Be2 34. Nf6 Re7 35. Rg5 Bb6 36. Kd2 Bc5 37. Nfe4 Bd4 38. Nf6 Bxe5 39. Rxe5 Rxe5 40. Nd7 Rd5+ 41. Ke3 Rxd6 42. Nxf8 Rd8 43. Ne6 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.10"]
[Round "9"]
[White "Heltzel, Joost"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "E98"]
[WhiteElo "2078"]
[PlyCount "77"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 Nc6 6. Be2 0-0 7. 0-0 e5 8. d5 Ne7 9. Ne1 Ne8 10. Be3 f5 11. f3 h5 12. c5 Kh7 13. a4 f4 14. Bf2 g5 15. a5 Ng6 16. b4 Bh6 17. Nd3 g4 18. fxg4 hxg4 19. Bxg4 Qg5 20. Bf3 Nh4 21. Bxh4 Qxh4 22. c6 Rb8 23. Nb5 Nf6 24. Nxa7 Ng4 25. Bxg4 Bxg4 26. Qe1 Qh5 27. Ra2 Bg5 28. cxb7 Rf6 29. Nc6 Rh6 30. g3 fxg3 31. Qxg3 Bh4 32. Qg2 Rg6 33. Kh1 Bd7 34. Qf3 Qxf3+ 35. Rxf3 Rbg8 36. Ra1 Bxc6 37. dxc6 d5 38. Nxe5 Rg2 39. Rh3 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "8"]
[White "Groenhuis, Vincent"]
[Black "Van Dommelen, Martin"]
[Result "1/2-1/2"]
[ECO "B28"]
[PlyCount "89"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf3 Bb4 7. Bd3 d5 8. Nxe5 dxe4 9. Bc4 Bxc3+ 10. bxc3 Qxd1+ 11. Kxd1 Bg4+ 12. f3 Bh5 13. g4 Bg6 14. Nxg6 hxg6 15. g5 Nh5 16. Re1 0-0 17. Rxe4 Nc6 18. a4 Na5 19. Bd3 Rac8 20. Bd2 Rfd8 21. Rb1 f6 22. c4 Rc5 23. Be3 Rf5 24. Bb6 Rd7 25. c5 Nc6 26. gxf6 Nxf6 27. Re3 Rf4 28. Ke1 Rxa4 29. Bxg6 Rh4 30. Bf5 Rxh2 31. Bxd7 Rh1+ 32. Kd2 Rxb1 33. Bxc6 bxc6 34. Re6 Rb5 35. Rxc6 Nd7 36. c4 Rb2+ 37. Kc3 Rf2 38. Rd6 Rxf3+ 39. Kb4 Rf7 40. Ka5 Ne5 41. Kxa6 Nxc4 42. Rd8+ Rf8 43. Rxf8+ Kxf8 44. c6 Ke8 45. Bc5 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "7"]
[White "Ris, Robert"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B32"]
[PlyCount "98"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qxf6 Nxf6 9. Nc3 d5 10. exd5 Nb4 11. Bd3 Nfxd5 12. Nxd5 Nxd5 13. Bd2 0-0 14. 0-0 Bd7 15. Rfe1 Rfe8 16. Be4 Bc6 17. Rad1 Rad8 18. c4 Ne7 19. Bxc6 Nxc6 20. Bc3 f6 21. a4 Kf7 22. Kf1 Ke6 23. Ke2 g5 24. f3 h5 25. g3 g4 26. b4 gxf3+ 27. Kxf3 Ne7 28. Ke4 Rc8 29. c5 Nd5 30. Bxe5 Nxb4 31. Bc3 Kf7+ 32. Kf3 Rxe1 33. Bxe1 Nc6 34. Rd7+ Kg6 35. Bc3 Ne5+ 36. Bxe5 fxe5 37. Rd5 Kf5 38. h3 Rf8 39. a5 Rf7 40. Rd6 e4+ 41. Ke2 Ke5 42. g4 hxg4 43. hxg4 Rg7 44. Rb6 Kd5 45. g5 Kxc5 46. g6 Kd4 47. Rb4+ Kd5 48. Rb6 Ke5 49. Ke3 Kf5 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.08"]
[Round "6"]
[White "Groenhuis, Vincent"]
[Black "Plukkel, Sjoerd"]
[Result "1-0"]
[ECO "B57"]
[BlackElo "2143"]
[PlyCount "71"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 Qb6 7. Nb3 e6 8. Be3 Qc7 9. g4 a6 10. Be2 Ne5 11. g5 Nfd7 12. Qd4 b5 13. 0-0-0 Bb7 14. f4 Nc6 15. Qd2 Na5 16. Qd4 Nxb3+ 17. axb3 Rc8 18. Rd2 Nc5 19. Kb1 Bc6 20. Bf2 Qb7 21. Re1 b4 22. Nd5 a5 23. f5 Kd8 24. fxe6 fxe6 25. Nf4 Bxe4 26. Bc4 Bf5 27. Bxe6 Nxe6 28. Nxe6+ Bxe6 29. Rxe6 Rc6 30. Qe4 Qd7 31. Re2 Kc7 32. Qd5 Ra6 33. R2e4 Kd8 34. Re8+ Kc7 35. Rc4+ Rc6 36. Qxa5+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "4"]
[White "Groenhuis, Vincent"]
[Black "Ondersteijn, Niels"]
[Result "1-0"]
[ECO "B35"]
[PlyCount "103"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Nf6 6. Nc3 Bg7 7. Bc4 0-0 8. Qd2 Ng4 9. 0-0-0 Nxe3 10. fxe3 d6 11. Rdf1 a6 12. h3 Ne5 13. Bb3 b5 14. g4 Bb7 15. h4 b4 16. Nd5 a5 17. Nf4 a4 18. Bd5 Bxd5 19. exd5 Qb6 20. h5 Nc4 21. Qd3 Nxe3 22. hxg6 fxg6 23. Qxe3 e5 24. dxe6 Qxd4 25. Qxd4 Bxd4 26. Nd5 Rxf1+ 27. Rxf1 Rf8 28. Re1 Be5 29. g5 Kg7 30. c4 bxc3 31. bxc3 Rf5 32. Nf6 Rxf6 33. gxf6+ Kxf6 34. Re4 Kxe6 35. Rxa4 Bxc3 36. Rc4 Be5 37. a4 Kd5 38. Rc7 h5 39. a5 h4 40. a6 Bd4 41. a7 Bxa7 42. Rxa7 Ke5 43. Kd2 Kf4 44. Ke2 g5 45. Rd7 Kg3 46. Rxd6 Kg2 47. Rg6 h3 48. Rxg5+ Kh1 49. Kf2 h2 50. Kg3 Kg1 51. Kh3+ Kh1 52. Rb5 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "5"]
[White "Konijn, Bart"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B32"]
[PlyCount "40"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qa3 Qg6 9. Nc3 Nd4 10. Bd3 Qxg2 11. Rf1 Nf3+ 12. Kd1 Ne7 13. Nb5 axb5 14. Qxa8 Nxh2 15. Re1 0-0 16. Qa7 d5 17. c3 Nf3 18. Rf1 Nc6 19. Qc5 Nh2 20. exd5 Rd8 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "2"]
[White "Groenhuis, Vincent"]
[Black "Thissen, Timon"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "59"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 d6 4. d4 exd4 5. cxd4 g6 6. Bc4 Bg7 7. Ng5 Nh6 8. Be3 0-0 9. Qd2 Ng4 10. h4 Qf6 11. Nc3 Qd8 12. 0-0-0 Na5 13. Bd3 f6 14. Nh3 Nxe3 15. Qxe3 Bd7 16. Nf4 Bh6 17. Kb1 b6 18. Qg3 Bxf4 19. Qxf4 Be6 20. Qh6 Qe8 21. h5 a6 22. e5 Bf5 23. Bxf5 gxf5 24. exf6 Qf7 25. Nd5 Kh8 26. Rde1 Nc6 27. Rh3 Rae8 28. Rhe3 Rxe3 29. Rxe3 Qg8 30. Rg3 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "3"]
[White "Sparenberg, Erik"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B32"]
[PlyCount "46"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qd1 Qg6 9. Nc3 Nf6 10. f3 0-0 11. Be3 b5 12. Qd2 Bb7 13. g4 d5 14. Nxd5 Nxd5 15. Qxd5 Nd4 16. Qxb7 Nxc2+ 17. Kd2 Nxa1 18. Bd3 Qd6 19. Ke2 Qb4 20. Rb1 Rfd8 21. Qb6 Rxd3 22. Rxa1 Rd6 23. Qc5 Qxb2+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.05"]
[Round "1"]
[White "Greeuw, Sietske"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B32"]
[PlyCount "57"]
[EventDate "2002.08.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Bd3 d5 7. exd5 Nxd5 8. 0-0 Be6 9. Bd2 Rc8 10. a3 Bd6 11. Nc3 Nf4 12. Be3 0-0 13. Ne4 Bb8 14. Nbc5 Bf5 15. Qf3 Nd4 16. Bxd4 exd4 17. Rad1 Rc6 18. Rd2 Qh4 19. Qg3 Nh3+ 20. gxh3 Bxg3 21. fxg3 Qxh3 22. Ng5 Qg4 23. Rxf5 g6 24. Rd5 Re8 25. Nce4 f5 26. Be2 Rxe4 27. Bxg4 Rxg4 28. Nf3 Re4 29. Nxd4 1-0

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2002.06.02"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Prosch, Sebastian"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "1944"]
[BlackElo "1801"]
[PlyCount "79"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Nc3 Nf6 7. Bc4 Qa5 8. 0-0 0-0 9. Bb3 d6 10. f3 Re8 11. Qd2 Bd7 12. Kh1 Rac8 13. g4 Nxd4 14. Bxd4 Bc6 15. Rad1 b5 16. Qg5 h6 17. Qd2 b4 18. Ne2 Bb5 19. Rf2 Bc4 20. Be3 d5 21. e5 Nd7 22. e6 fxe6 23. Bxh6 e5 24. Ng3 Qb6 25. Kg2 Nf6 26. Bxg7 Kxg7 27. Qg5 Qe6 28. Re1 e4 29. Kg1 Rh8 30. Nf5+ Kf7 31. Nd4 Qb6 32. Qe5 Qd6 33. Qxd6 exd6 34. fxe4 Kg7 35. Ne6+ Kf7 36. exd5 Bxb3 37. axb3 g5 38. Ref1 Rh6 39. Nxg5+ Kg7 40. Ne6+ 1-0

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2002.06.01"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Zimmermann, Julian"]
[Result "0-1"]
[ECO "B87"]
[WhiteElo "1944"]
[BlackElo "2180"]
[PlyCount "70"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. f3 Nbd7 9. g4 Nc5 10. g5 Nfd7 11. Be3 Nb6 12. Qe2 Qc7 13. 0-0-0 b4 14. Nb1 Bd7 15. f4 a5 16. f5 e5 17. Nf3 Rc8 18. g6 hxg6 19. Ng5 Nxb3+ 20. axb3 gxf5 21. Qf2 Be7 22. h4 Rb8 23. exf5 d5 24. Rhe1 Bf6 25. Nd2 a4 26. Kb1 a3 27. Ndf3 Bxf5 28. Nxe5 Bxc2+ 29. Qxc2 a2+ 30. Ka1 Qxc2 31. Bxb6 Rxb6 32. Rc1 Qxc1+ 33. Rxc1 Bxg5 34. hxg5 Rh5 35. Re1 Re6 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.05.04"]
[Round "9.8"]
[White "Groenhuis, Vincent"]
[Black "Van Dongen, Cor"]
[Result "0-1"]
[ECO "B57"]
[BlackElo "2239"]
[PlyCount "52"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 Qb6 7. Nb3 e6 8. Be3 Qc7 9. Nb5 Qb8 10. f3 a6 11. N5d4 Ne5 12. Be2 Qc7 13. Qd2 Be7 14. g4 Nfd7 15. h4 b6 16. g5 Bb7 17. 0-0-0 b5 18. Na5 Nc4 19. Nxc4 bxc4 20. Qc3 d5 21. g6 hxg6 22. Nxe6 fxe6 23. Qxg7 Bf6 24. Qxg6+ Ke7 25. exd5 Bxd5 26. Qg2 Ne5 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.05.03"]
[Round "7.10"]
[White "Groenhuis, Vincent"]
[Black "Beekhuis, Maarten"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "72"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Ne4 6. cxd4 Bb4+ 7. Nbd2 d6 8. Bb5 dxe5 9. Qa4 Nxd2 10. Nxd2 Bxd2+ 11. Bxd2 0-0 12. Bxc6 bxc6 13. dxe5 Qd3 14. Qb3 Qe4+ 15. Qe3 Qxg2 16. 0-0-0 Bf5 17. Rhg1 Qd5 18. b3 a5 19. Bb4 axb4 20. Rxd5 cxd5 21. Kb2 Ra5 22. Ra1 Rfa8 23. Qf4 Be6 24. Qxb4 c5 25. Qb6 c4 26. b4 Ra3 27. b5 c3+ 28. Kc1 Bf5 29. Qc5 h6 30. b6 Rb3 31. b7 Rxb7 32. Qxc3 Rc8 33. Kd2 Rxc3 34. Kxc3 Rb1 35. Rxb1 Bxb1 36. a4 Ba2 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.05.03"]
[Round "8.11"]
[White "Hummel, Erik Jan"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B32"]
[PlyCount "86"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qf6 8. Qd3 Qg6 9. g3 Nf6 10. Nc3 d5 11. Bg2 0-0 12. 0-0 Rd8 13. exd5 Bf5 14. Qd1 Nb4 15. Be3 Nxc2 16. Rc1 Bd3 17. Bb6 Rdc8 18. Bh3 Rc4 19. Kh1 Rb4 20. Bc7 Bxf1 21. Bxf1 Rxb2 22. Bd3 Qh6 23. Rxc2 Rxc2 24. Bxc2 Qh3 25. d6 Ng4 26. Qg1 Nxh2 27. Bxh7+ Qxh7 28. Qxh2 Qd3 29. Qg2 Qxc3 30. Qxb7 Rf8 31. Kg2 Qd3 32. Qb3 Qf5 33. Qd5 Qd7 34. Qb7 a5 35. Qd5 a4 36. Ba5 Rb8 37. Bc3 Qb7 38. Qxb7 Rxb7 39. Bxe5 Rd7 40. g4 f6 41. Bf4 Kf7 42. Kf3 Ke6 43. Ke4 Rb7 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.05.01"]
[Round "5.6"]
[White "Groenhuis, Vincent"]
[Black "Heltzel, Joost"]
[Result "0-1"]
[ECO "B18"]
[PlyCount "76"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Bc4 e6 9. Nf3 Bd6 10. Qe2 Nd7 11. Ne4 Bc7 12. Bd2 Ngf6 13. Bd3 Nxe4 14. Bxe4 Bxe4 15. Qxe4 Nf6 16. Qd3 Qd5 17. b3 Qe4+ 18. Qxe4 Nxe4 19. Bb4 a5 20. Ba3 a4 21. Ke2 Bd6 22. Bxd6 Nxd6 23. Ne5 Ke7 24. Rhd1 Rhd8 25. Rd3 axb3 26. cxb3 Nf5 27. Nf3 Ra3 28. Rd2 Rda8 29. Rb2 Nd6 30. Kd3 Nb5 31. Kc4 Nc7 32. Ne5 Nd5 33. g4 f6 34. Nd3 R8a4+ 35. Kc5 Ra5+ 36. Kc4 R5a4+ 37. Kc5 Kd7 38. Nb4 Rxb4 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.05.01"]
[Round "4.4"]
[White "Smeets, Jan"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B33"]
[WhiteElo "2327"]
[PlyCount "83"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. c4 Be7 10. Be2 a6 11. Nc3 0-0 12. 0-0 f5 13. f4 Nd7 14. g3 Qc7 15. Kh1 Nf6 16. b4 b6 17. Qb3 Kh8 18. Be3 Bd7 19. Rac1 Rab8 20. Qa3 h5 21. Qxa6 Ng4 22. Bg1 h4 23. h3 Nh6 24. gxh4 Bxh4 25. Qa3 exf4 26. Nb5 Bxb5 27. cxb5 Qe7 28. Qf3 Bg3 29. Rc6 Rfe8 30. Bd1 Qf6 31. Rxb6 Rxb6 32. Bxb6 Ng4 33. Bg1 Qh4 34. Qg2 Re4 35. a3 Ne3 36. Bxe3 Rxe3 37. b6 Rxa3 38. b7 Qd8 39. Qc2 Kh7 40. Qc8 Qh4 41. Qxf5+ g6 42. Qd7+ 1-0

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.04.30"]
[Round "2.4"]
[White "Groenhuis, Vincent"]
[Black "Jens, Jelmer"]
[Result "0-1"]
[ECO "C18"]
[BlackElo "2329"]
[PlyCount "72"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 Ne7 5. a3 Bxc3+ 6. bxc3 c5 7. Qg4 0-0 8. Bd3 f5 9. exf6 Rxf6 10. Bg5 Rf7 11. Qh5 g6 12. Qh4 Nbc6 13. Nf3 c4 14. Be2 Qa5 15. Bd2 Bd7 16. Qg5 Nf5 17. h4 Qc7 18. h5 h6 19. Qg4 g5 20. Bxg5 Rg7 21. Qf4 Qa5 22. Qd2 hxg5 23. Nxg5 Qd8 24. f4 Qf6 25. 0-0-0 Ng3 26. Rhe1 Rf8 27. Bg4 Nd8 28. h6 Rg6 29. h7+ Kh8 30. Re5 Qxf4 31. Qxf4 Rxf4 32. Bf3 Nc6 33. Nh3 Rxf3 34. gxf3 Nxe5 35. dxe5 Nf5 36. Nf4 Rh6 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.04.30"]
[Round "3.9"]
[White "Lui, Kachun"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "E61"]
[PlyCount "67"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. Bg5 h6 6. Bh4 Nc6 7. e3 g5 8. Bg3 Nh5 9. Bd3 Nxg3 10. hxg3 e5 11. d5 Ne7 12. Nd2 0-0 13. g4 f5 14. gxf5 Nxf5 15. Qe2 Bd7 16. 0-0-0 Qe7 17. Nf3 Rf7 18. g4 Nd4 19. exd4 Bxg4 20. Qe4 Bxf3 21. Qh7+ Kf8 22. Rxh6 g4 23. Rd2 exd4 24. Ne4 Bxe4 25. Bxe4 Qg5 26. Rh5 Qf4 27. Bf5 d3 28. Qg6 Bxb2+ 29. Kxb2 Qxd2+ 30. Ka3 Qc3+ 31. Ka4 Qxc4+ 32. Ka3 Qc3+ 33. Ka4 b5+ 34. Kxb5 0-1

[Event "NED-ch U20"]
[Site "Nijmegen"]
[Date "2002.04.29"]
[Round "1.10"]
[White "Van Ruitenburg, Joost"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "A45"]
[PlyCount "58"]
[EventDate "2002.04.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. c4 d5 5. cxd5 Qxd5 6. Nc3 Qa5 7. a3 Bg7 8. b4 Qb6 9. Rc1 c6 10. e3 0-0 11. Na4 Qc7 12. g3 Bf5 13. Bg2 Qe7 14. Nc5 b6 15. Nd3 a5 16. Rc4 axb4 17. Nxb4 Rxa3 18. Nxc6 Nxc6 19. Bxc6 Bh6 20. Ne2 Rd3 21. Qc1 Bxe3 22. fxe3 Rxe3 23. Qb2 Bd3 24. Rc2 Rc8 25. Rd2 Rxc6 26. Kf2 Qe4 27. Rf1 Bxe2 28. Rxe2 Rxe2+ 29. Qxe2 Rc2 0-1

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2002.04.21"]
[Round "?"]
[White "Musoldt, Christoph"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1316"]
[BlackElo "1944"]
[PlyCount "152"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 h6 6. Bf4 Nh5 7. Bg3 f5 8. e3 e6 9. Nh4 Qf6 10. Be2 Nxg3 11. hxg3 h5 12. Nxg6 Qxg6 13. Bxh5 Ke7 14. Bxg6 Rxh1+ 15. Kd2 Rxd1+ 16. Rxd1 Bd7 17. Rh1 Na6 18. Rh7 Kf6 19. Bh5 c5 20. d5 e5 21. e4 Rg8 22. f4 Rh8 23. fxe5+ dxe5 24. Rxh8 Bxh8 25. exf5 Kxf5 26. g4+ Kf4 27. g3+ Kxg3 28. Ke3 Bg7 29. a3 b6 30. Ne4+ Kh4 31. Nd6 Bxg4 32. Bxg4 Kxg4 33. Ke4 Nb8 34. Nc8 Nd7 35. Nxa7 Kg5 36. Nc6 Kf6 37. b4 cxb4 38. axb4 Bf8 39. c5 bxc5 40. Nxe5 Nxe5 41. bxc5 Bxc5 42. d6 Bxd6 43. Kd5 Bb8 44. Ke4 Ng6 45. Kd5 Ne7+ 46. Ke4 Ke6 47. Kd4 Kf5 48. Ke3 Ke5 49. Kd3 Ba7 50. Kc4 Bg1 51. Kc3 Nf5 52. Kc4 Nd6+ 53. Kd3 Kf4 54. Kc3 Ke4 55. Kd2 Bb6 56. Kc3 Ba5+ 57. Kc2 Kd4 58. Kb3 Kd3 59. Ka3 Be1 60. Kb3 Bd2 61. Kb2 Ne4 62. Kb3 Nc5+ 63. Kb2 Ba5 64. Kc1 Nb3+ 65. Kd1 Nd4 66. Kc1 Ke2 67. Kb2 Bb4 68. Kc1 Ke1 69. Kb1 Kd2 70. Kb2 Kd3 71. Kc1 Ke2 72. Kb2 Kd2 73. Kb1 Ba3 74. Ka2 Bc1 75. Kb1 Nb5 76. Ka1 Kc2 0-1

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2002.03.09"]
[Round "?"]
[White "Hintz, Bastian"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1920"]
[BlackElo "1944"]
[PlyCount "94"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 Nf6 5. Bb5 Qb6 6. d3 Be7 7. Bxc6 Qxc6 8. 0-0 d6 9. Qe1 Bd7 10. Qg3 0-0-0 11. e5 Nh5 12. Qe1 g6 13. g4 Ng7 14. exd6 Qxd6 15. Ne5 Be8 16. Ne4 Qc7 17. a3 f6 18. Nc4 Bc6 19. b4 Bxe4 20. Qxe4 f5 21. Qe1 Bf6 22. Rb1 fxg4 23. Be3 Bd4 24. c3 Bxe3+ 25. Qxe3 b6 26. Qe4 cxb4 27. Rxb4 Qc5+ 28. Ne3 Kb8 29. Rc4 Qd6 30. Rc6 Qd7 31. Rb1 Rc8 32. Qe5+ Ka8 33. Rd6 Qc7 34. Nc4 Qc5+ 35. Qxc5 Rxc5 36. Rc1 Rhc8 37. Rd7 R5c7 38. Rxc7 Rxc7 39. Ne5 Nh5 40. Nxg4 Nxf4 41. Rc2 Nxd3 42. Kf1 h5 43. Ne3 Kb7 44. Ke2 Nf4+ 45. Kf3 Nd5 46. Ng2 b5 47. Nh4 g5 0-1

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2002.02.10"]
[Round "?"]
[White "Winnicki, Alice"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1780"]
[BlackElo "1944"]
[PlyCount "64"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. h3 Bf5 8. 0-0 Nc6 9. Qa4 Nd7 10. Rd1 Be7 11. c4 Qd6 12. d5 exd5 13. Rxd5 Qg6 14. Bf4 0-0 15. Qd1 Nb6 16. Ne5 Nxe5 17. Rxe5 Rad8 18. Nd2 Bxh3 19. Bg3 Bd6 20. Bh5 Qh6 21. Bxf7+ Rxf7 22. Rh5 Qf6 23. Ne4 Qg6 24. Rxh3 Qxe4 25. Bxd6 Nxc4 26. Qb3 Rxd6 27. Rc1 Nd2 28. Qc3 b6 29. Re3 Qd4 30. Qc2 Rd8 31. Rd1 Nf3+ 32. gxf3 Qxd1+ 0-1

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2001.12.09"]
[Round "?"]
[White "Frackowiak, Oliver"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2008"]
[BlackElo "1944"]
[PlyCount "47"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 e5 4. cxd4 Nf6 5. Nc3 Bb4 6. dxe5 Nxe4 7. Qd4 Qa5 8. Nge2 Nxc3 9. bxc3 Bc5 10. Qg4 Rg8 11. Qg3 Nc6 12. Bf4 b6 13. Qd3 Ba6 14. Qd2 g5 15. Bg3 0-0-0 16. Nc1 Bxf1 17. Nb3 Qb5 18. Rxf1 Nxe5 19. Nxc5 Rge8 20. 0-0-0 Qxc5 21. Qd5 Qxc3+ 22. Kb1 Qb4+ 23. Ka1 Qc3+ 24. Kb1 1/2-1/2

[Event "JBLN West 0102 "]
[Site "Germany"]
[Date "2001.11.04"]
[Round "?"]
[White "Preusser, Raimund"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2152"]
[BlackElo "1944"]
[PlyCount "61"]
[EventDate "2002.10.??"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Qb6 4. Nc3 e6 5. 0-0 Nf6 6. e5 Nd5 7. Bc4 Nf4 8. d3 Ng6 9. Qe2 Qc7 10. Re1 a6 11. a4 b6 12. b3 Bb7 13. Bb2 Be7 14. Qe3 0-0-0 15. a5 Nd4 16. axb6 Qc6 17. Rec1 Qxb6 18. Ne4 Nxf3+ 19. gxf3 f5 20. Nd6+ Bxd6 21. exd6 Nh4 22. b4 Nxf3+ 23. Kf1 Nxh2+ 24. Ke2 Ng4 25. Qxc5+ Qxc5 26. bxc5 Rdg8 27. Bxa6 Nf6 28. Bxf6 gxf6 29. Rcb1 Kd8 30. Rxb7 Ke8 31. Bb5 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "1"]
[White "Crefcoeur, Remco"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "E70"]
[PlyCount "84"]
[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. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 Nc6 6. Ng3 0-0 7. Be2 e5 8. d5 Ne7 9. Bg5 Ne8 10. Qd2 f6 11. Be3 f5 12. f4 fxe4 13. Ngxe4 Nf5 14. 0-0 Bh6 15. g3 Nxe3 16. Qxe3 Ng7 17. Ng5 Nf5 18. Qd2 Nd4 19. Bd3 Bxg5 20. fxg5 Nf3+ 21. Rxf3 Rxf3 22. Ne4 Kg7 23. Nf6 Bh3 24. Be4 Rxf6 25. gxf6+ Qxf6 26. Bg2 Bxg2 27. Qxg2 Rf8 28. Rf1 Qxf1+ 29. Qxf1 Rxf1+ 30. Kxf1 Kf6 31. Kf2 Kf5 32. Kf3 h5 33. h3 a5 34. b3 c6 35. a3 e4+ 36. Ke3 c5 37. Ke2 Ke5 38. Ke3 g5 39. g4 h4 40. Ke2 Kd4 41. Kd2 e3+ 42. Ke2 Ke4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "9"]
[White "De Hoop, Thomas"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B89"]
[PlyCount "49"]
[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 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. Be3 Be7 8. Qe2 a6 9. Bb3 Bd7 10. 0-0-0 Rc8 11. g4 Ne5 12. Rhg1 0-0 13. g5 Ne8 14. f4 Nc6 15. Qh5 Na5 16. Rg3 e5 17. fxe5 Nxb3+ 18. axb3 g6 19. Qh6 Ng7 20. exd6 Bxd6 21. Nd5 Nh5 22. Rf3 Be5 23. Nf5 Bxf5 24. Bd4 Bxe4 25. Re3 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "7"]
[White "Fijlstra, Bobby"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B76"]
[PlyCount "36"]
[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 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 a6 7. Be3 g6 8. f3 Bg7 9. Qd2 0-0 10. 0-0-0 Bd7 11. g4 Rc8 12. Nb3 Na5 13. Nxa5 Qxa5 14. Kb1 Be6 15. Nd5 Qa4 16. b3 Qa3 17. Qb4 Qb2+ 18. Kxb2 Nxd5+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "3"]
[White "Groenewold, Jan Joris"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "A15"]
[PlyCount "85"]
[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. c4 d6 3. g3 g6 4. b4 Bg7 5. Bb2 0-0 6. Bg2 a5 7. b5 e5 8. d3 Nbd7 9. 0-0 Nc5 10. Nfd2 Bg4 11. Nc3 Nxd3 12. Ba3 e4 13. h3 Bh5 14. g4 Nxg4 15. hxg4 Bxg4 16. Ndxe4 Nf4 17. Rc1 Qh4 18. Re1 Be5 19. Ng3 Nxg2 20. Kxg2 Bh3+ 21. Kh2 Be6+ 22. Kg2 Qh3+ 23. Kg1 h5 24. Qd3 h4 25. Nf1 Qg4+ 26. Kh1 Bxc4 27. Qf3 Qe6 28. Ne3 Bxc3 29. Rxc3 Bxb5 30. Bb2 Qxa2 31. Ba1 Qe6 32. Ng4 f6 33. Rxc7 Bc6 34. e4 Rae8 35. Bxf6 Bd7 36. Rg1 Rc8 37. Rxc8 Bxc8 38. Qf4 Bd7 39. Qh6 Qxe4+ 40. Kh2 Kf7 41. Qg7+ Ke8 42. Bxh4 Qf4+ 43. Rg3 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "2"]
[White "Groenhuis, Vincent"]
[Black "Jongsma, Daan"]
[Result "1/2-1/2"]
[ECO "B78"]
[BlackElo "2232"]
[PlyCount "114"]
[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 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bc4 Bg7 6. Be3 Nf6 7. Nc3 0-0 8. f3 Na5 9. Bb3 Nxb3 10. Nxb3 d6 11. Qd2 Bd7 12. 0-0-0 a5 13. g4 a4 14. Nd4 Rc8 15. Nd5 Nxd5 16. exd5 Qc7 17. Kb1 Qc4 18. h4 Qxd5 19. Nf5 Qxd2 20. Nxe7+ Kh8 21. Bxd2 Rce8 22. Nd5 Bc6 23. Bb4 Re5 24. c4 Re2 25. Rd2 Rfe8 26. Rhd1 b5 27. Rxe2 Rxe2 28. Nc3 Re6 29. Nxb5 Bxf3 30. Rxd6 Rxd6 31. Nxd6 Kg8 32. g5 Bf8 33. c5 Bxd6 34. cxd6 Bg4 35. Kc2 Bd7 36. b3 Kf8 37. Kc3 axb3 38. axb3 Ke8 39. Bc5 Kd8 40. Bb6+ Kc8 41. Kd4 Kb7 42. Kc5 Ka6 43. b4 Ba4 44. Bd8 Bd7 45. Bf6 Be8 46. Bc3 Bd7 47. Kd5 Kb5 48. Ke5 Kc6 49. Bd4 Be6 50. Bc5 Bc4 51. Kf6 Kd7 52. Kg7 Ke6 53. Kxh7 Kd7 54. Kh6 Be2 55. Kg7 Ke6 56. Kf8 Bb5 57. Bd4 Ba4 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "6"]
[White "Groenhuis, Vincent"]
[Black "Rupert, Casper"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "102"]
[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. Nc3 d5 3. d3 Bb4 4. Bd2 dxe4 5. Nxe4 Bxd2+ 6. Qxd2 Nd7 7. d4 Ngf6 8. Ng5 Qe7 9. 0-0-0 c5 10. Bd3 cxd4 11. N1f3 e5 12. Rhe1 0-0 13. Nxd4 Nc5 14. Bc4 Qd6 15. Qe3 exd4 16. Rxd4 Qc7 17. Nxf7 Bf5 18. Nd6+ Kh8 19. Nxf5 Rae8 20. Qc3 Nfe4 21. Qh3 Qf4+ 22. Ne3 Qxf2 23. Rf1 Nd3+ 24. Rxd3 Qxf1+ 25. Nxf1 Rxf1+ 26. Rd1 Rxd1+ 27. Kxd1 Nf2+ 28. Kd2 Nxh3 29. gxh3 g6 30. Bd5 Re7 31. c4 Kg7 32. Kd3 Kf6 33. b4 Ke5 34. a4 Rd7 35. Ke3 a6 36. Be4 Rd4 37. Bxb7 Rxc4 38. b5 axb5 39. axb5 Rc3+ 40. Kf2 Rxh3 41. Kg2 Rb3 42. Bc6 Kf4 43. Bd7 h5 44. Be8 h4 45. h3 Rb2+ 46. Kf1 Kf3 47. Bc6+ Ke3 48. Bd7 g5 49. Kg1 Kf3 50. Bg4+ Kg3 51. Bd7 Rb1# 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "8"]
[White "Groenhuis, Vincent"]
[Black "Van Rosmalen, Joost"]
[Result "0-1"]
[ECO "B19"]
[PlyCount "76"]
[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. h4 h6 7. h5 Bh7 8. Nf3 Nd7 9. Bc4 Qc7 10. Rh4 e6 11. Kf1 Ngf6 12. Qe2 Bd6 13. Bd2 0-0 14. Re1 Bxg3 15. fxg3 Qxg3 16. Bf4 Nxh5 17. Rxh5 Qxf4 18. Kg1 Bg6 19. Rh4 Qf6 20. c3 Rfe8 21. Rh3 Rad8 22. Rf1 Bf5 23. Rg3 Qe7 24. Qe3 Qd6 25. Nh4 Nf6 26. Bd3 Nh5 27. Rgf3 Bxd3 28. Qxd3 f5 29. Ng6 c5 30. Qc4 cxd4 31. Rd1 Qc6 32. Qb3 Qb6 33. Qxb6 axb6 34. cxd4 Rd5 35. Rc3 Kh7 36. Ne5 Red8 37. Rcd3 Nf4 38. R3d2 Rxd4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "4"]
[White "Groenhuis, Vincent"]
[Black "Veltman, Anne"]
[Result "1-0"]
[ECO "C89"]
[PlyCount "93"]
[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. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 0-0 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. Bxd5 cxd5 13. d4 Bd6 14. Re3 Qh4 15. h3 f5 16. Qf3 Bb7 17. Nd2 Rae8 18. Qe2 Bc6 19. Nf3 Qf6 20. Bd2 Re4 21. Ng5 Bf4 22. Rxe4 fxe4 23. Bxf4 h6 24. Nxe4 Qxf4 25. Nd2 Re8 26. Qd3 Bd7 27. Nf3 Bf5 28. Qd1 Be4 29. Ne5 Rf8 30. f3 Bf5 31. Qe1 Qg5 32. Kh2 h5 33. h4 Qf4+ 34. g3 Qh6 35. a4 b4 36. c4 dxc4 37. Qxb4 Qe3 38. Qxc4+ Kh7 39. Rg1 Rc8 40. Qf7 Rc2+ 41. Kh1 Qe2 42. Qxh5+ Kg8 43. Qf7+ Kh8 44. Qf8+ Kh7 45. Qxf5+ Kg8 46. Qh3 Rxb2 47. Qg2 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "5"]
[White "Van Dommelen, Martin"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B24"]
[PlyCount "90"]
[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 e6 3. g3 Nf6 4. Bg2 Nc6 5. f4 d5 6. e5 Nd7 7. d3 a6 8. Nf3 b5 9. 0-0 Bb7 10. Bd2 Qc7 11. Qe1 0-0-0 12. Kh1 Be7 13. Bh3 g5 14. f5 Ndxe5 15. Nxg5 b4 16. Ne2 h6 17. Nf3 Nxf3 18. Rxf3 Ne5 19. Rf2 d4+ 20. Bg2 Bxg2+ 21. Rxg2 Nf3 22. Qc1 Nxd2 23. Qxd2 Bg5 24. Qe1 exf5 25. Qf2 Rd5 26. a3 bxa3 27. Rxa3 Qc6 28. h4 Be3 29. Qf3 Kb7 30. c4 Rd6 31. Rb3+ Kc7 32. Qxf5 f6 33. Kh2 Re8 34. Nf4 Bxf4 35. gxf4 Rde6 36. Qh7+ R8e7 37. Qh8 Re8 38. Qxh6 Re2 39. Qg7+ R8e7 40. Qg4 Qe8 41. Qg3 Rxg2+ 42. Kxg2 Re2+ 43. Kf1 Re3 44. Qg7+ Re7 45. Qg3 Re3 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "Groenhuis, Vincent"]
[Black "Cleven, Maria"]
[Result "1-0"]
[ECO "B43"]
[BlackElo "2070"]
[PlyCount "85"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. a3 Nf6 7. Be2 d6 8. Be3 b5 9. Qd2 Bb7 10. f3 h6 11. g4 Nbd7 12. 0-0-0 Ne5 13. h4 Nc4 14. Bxc4 bxc4 15. g5 Nd7 16. g6 Ne5 17. gxf7+ Qxf7 18. Rdf1 Rb8 19. Rhg1 Ba8 20. f4 Nc6 21. f5 Nxd4 22. fxe6 Nb3+ 23. cxb3 Qxe6 24. Bd4 Rg8 25. Qf4 Rb7 26. Nd5 cxb3 27. h5 Rf7 28. Qxf7+ Qxf7 29. Rxf7 Kxf7 30. Rf1+ Ke6 31. Nc7+ Kd7 32. Nxa8 g5 33. hxg6 Be7 34. Nb6+ Ke6 35. g7 h5 36. Kd2 h4 37. Rf5 h3 38. Rh5 Bf6 39. Rh6 Rxg7 40. Rxf6+ Ke7 41. Nd5+ Kd7 42. Rf2 Kc6 43. Bxg7 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "De Hoop, Thomas"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B33"]
[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 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. g3 Rg8 12. Qh5 h6 13. exf5 Rg5 14. Qd1 Bxf5 15. Bg2 Rc8 16. h4 Rg6 17. Ne3 Be6 18. c3 f5 19. Bf3 Kd7 20. Nd5 Be7 21. Nxe7 Qxe7 22. Bd5 Rcg8 23. c4 Nd4 24. Nc2 Nxc2+ 25. Qxc2 Rc8 26. Bxe6+ Qxe6 27. b3 bxc4 28. Rc1 Rg4 29. 0-0 d5 30. Rfd1 c3 31. Rd3 d4 32. Qd1 Ke7 33. Kh2 Rcg8 34. Qh1 f4 35. Qb7+ Kf6 36. Rf3 R8g7 37. Qb8 Qd5 38. Qf8+ Kg6 39. Kg2 Kh7 40. Qf5+ Kh8 41. Qc8+ Rg8 42. Qxa6 R4g6 43. Qe2 fxg3 44. h5 Rg5 45. Qa6 gxf2+ 46. Kxf2 Rg2+ 47. Ke1 Qe4+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Groenhuis, Vincent"]
[Black "Vinck, Martin"]
[Result "0-1"]
[ECO "B86"]
[PlyCount "56"]
[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. Bc4 e6 7. Bb3 Nbd7 8. Be3 Nc5 9. f3 b5 10. Qd2 Bd7 11. g4 h6 12. 0-0-0 Rb8 13. h4 g6 14. g5 hxg5 15. hxg5 Nh5 16. Nde2 a5 17. Bd4 Rg8 18. Bxc5 dxc5 19. a3 c4 20. Ba2 b4 21. Bxc4 bxc3 22. Nxc3 Qc7 23. e5 Bc6 24. Rhf1 Bc5 25. Ne4 Qxe5 26. c3 Be7 27. Rfe1 Qf4 28. Qxf4 Nxf4 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Groenhuis, Vincent"]
[Black "Benning, Tim"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "93"]
[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. c3 d5 4. Bb5 dxe4 5. Nxe5 Bd7 6. Bxc6 bxc6 7. d4 Bd6 8. Qe2 Nf6 9. Bg5 Qe7 10. Nd2 Bxe5 11. dxe5 Qxe5 12. Bxf6 Qxf6 13. Nxe4 Qe7 14. Nc5 Qxe2+ 15. Kxe2 Bf5 16. Rad1 0-0 17. Rhe1 Rab8 18. b4 a5 19. a3 h5 20. Ke3 Ra8 21. a4 Rfb8 22. Rd4 Kf8 23. Kf4 g6 24. Red1 Ke7 25. f3 Rh8 26. g4 hxg4 27. fxg4 Be6 28. Kg3 Rh7 29. h4 Rhh8 30. g5 Bd5 31. Re1+ Be6 32. Rd7+ Kf8 33. Rxc7 Bd5 34. Ree7 Kg7 35. Kg4 Rhb8 36. Rb7 axb4 37. cxb4 Rxb7 38. Rxb7 Bc4 39. a5 Be2+ 40. Kf4 Bc4 41. Nd7 Bd5 42. Nb6 Rh8 43. Nxd5 cxd5 44. a6 Rxh4+ 45. Ke5 Re4+ 46. Kxd5 Re6 47. b5 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Groenhuis, Vincent"]
[Black "Van Veen, Oscar"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "86"]
[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. c3 d5 4. Bb5 dxe4 5. Nxe5 Bd6 6. Nxc6 bxc6 7. Bxc6+ Bd7 8. Bxe4 Nf6 9. Bxa8 Qxa8 10. f3 0-0 11. 0-0 Qd5 12. d4 Qh5 13. g3 Re8 14. Re1 Rxe1+ 15. Qxe1 Qxf3 16. Qf2 Qd1+ 17. Qf1 Qh5 18. Bf4 Bh3 19. Qd3 Bxf4 20. gxf4 Qg4+ 21. Kf2 Qg2+ 22. Ke1 Ne4 23. Nd2 Qg1+ 24. Nf1 Qf2+ 25. Kd1 Qxf4 26. Kc2 Bf5 27. Ne3 Qxh2+ 28. Kc1 Qg1+ 29. Nd1 Nf2 30. Qe2 Qxd1+ 31. Qxd1 Nxd1 32. Kxd1 Be4 33. Ke2 f5 34. Ke3 g5 35. c4 Kf7 36. d5 Kf6 37. Kd4 g4 38. Re1 g3 39. c5 h5 40. c6 Ke7 41. Ke5 h4 42. Kf4 g2 43. b4 Kd6 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "Nieuwenbroek, Mark"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "90"]
[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 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. c4 Be7 10. Be2 0-0 11. 0-0 a6 12. Nc3 f5 13. Bd2 Nd7 14. b4 b6 15. Qb3 Bb7 16. a3 Rc8 17. Rab1 Kh8 18. f4 e4 19. Be3 Bf6 20. Rbc1 g5 21. Na4 gxf4 22. Bxf4 Bd4+ 23. Kh1 Qf6 24. c5 dxc5 25. bxc5 Bxc5 26. Nxc5 Nxc5 27. Qg3 Qg6 28. Be5+ Kg8 29. Bc4 Kf7 30. Rxf5+ Qxf5 31. Rf1 Qxf1+ 32. Bxf1 Bxd5 33. Be2 Ne6 34. Bh5+ Ke7 35. Bd6+ Kd7 36. h3 Rg8 37. Bg4 h5 38. Bb4 Rc6 39. Bxe6+ Bxe6 40. Qh4 a5 41. Qe7+ Kc8 42. Bd2 e3 43. Bxe3 Bd5 44. Bg5 Rc2 45. h4 Rxg2 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Groenhuis, Vincent"]
[Black "Kukel, Imre1111"]
[Result "0-1"]
[ECO "B09"]
[BlackElo "2220"]
[PlyCount "52"]
[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 d6 2. d4 Nf6 3. Nc3 g6 4. f4 Bg7 5. Nf3 c5 6. e5 Ng4 7. dxc5 dxe5 8. Qxd8+ Kxd8 9. Ng5 Nh6 10. Bc4 f6 11. Ne6+ Bxe6 12. Bxe6 Na6 13. Be3 exf4 14. 0-0-0+ Ke8 15. Bxf4 Nxc5 16. Bc4 Nf7 17. Nd5 Rc8 18. Rhe1 e5 19. b4 Nd7 20. Bb5 Rd8 21. Be3 a6 22. Bc5 Nd6 23. Nc7+ Kf7 24. Bxd7 Rxd7 25. Bxd6 Rhd8 26. Bc5 Bh6+ 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Van der Weij, Rik"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "A48"]
[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. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d6 5. e4 Nc6 6. c3 0-0 7. Bc4 h6 8. Bf4 Nh5 9. Be3 e5 10. dxe5 Nxe5 11. Nxe5 dxe5 12. Qf3 Qe7 13. g4 Nf6 14. g5 Ng4 15. gxh6 Bxh6 16. Bxh6 Nxh6 17. Rg1 Be6 18. 0-0-0 Rad8 19. Qe2 Kh7 20. Bxe6 Qxe6 21. a3 f6 22. Qe3 b6 23. Qg3 g5 24. Nf3 Qe7 25. h4 Rxd1+ 26. Rxd1 g4 27. Nh2 Rg8 28. Qd3 Qc5 29. Qg3 Rg7 30. Nf1 f5 31. Rd5 f4 32. Qg2 Qe7 33. Nd2 c6 34. Rd3 Qxh4 35. Nc4 g3 36. fxg3 fxg3 37. Ne3 Qf4 38. Kc2 Rf7 39. Nf5 Nxf5 40. exf5 Qxf5 41. Qxg3 Qf2+ 42. Kb3 Qxg3 43. Rxg3 Rg7 44. Re3 Rg5 45. Kc4 Kg6 46. Kd3 Kf6 47. b4 b5 48. c4 Rg4 49. cxb5 cxb5 50. Kc3 Ke6 51. Kb3 Kd5 52. a4 a6 53. axb5 axb5 54. Rc3 Rc4 55. Rxc4 bxc4+ 56. Kc3 e4 57. b5 e3 58. b6 Kc6 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Weijers, Ralf"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "90"]
[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. f4 Nc6 3. Nf3 e6 4. Be2 Nf6 5. d3 d5 6. e5 Nd7 7. c3 Be7 8. d4 0-0 9. 0-0 Qb6 10. Kh1 f6 11. b3 cxd4 12. cxd4 Qc7 13. Be3 Nb6 14. Nc3 a6 15. a3 Bd7 16. Bd3 Rac8 17. Nd2 Nxe5 18. dxe5 Qxc3 19. Bxh7+ Kxh7 20. Bxb6 fxe5 21. Qh5+ Kg8 22. Nf3 Rxf4 23. Nxe5 Rf5 24. Rxf5 Qxa1+ 25. Bg1 Be8 26. Ng6 exf5 27. Nxe7+ Kf8 28. Qxf5+ Kxe7 29. Qxc8 Bc6 30. Qc7+ Ke6 31. Qc8+ Ke5 32. Qc7+ Ke4 33. Qe7+ Kd3 34. Qb4 Qc3 35. Qxc3+ Kxc3 36. Bc5 d4 37. Bb4+ Kc2 38. h4 d3 39. Kh2 d2 40. Bxd2 Kxd2 41. g4 g6 42. Kg3 Kc3 43. Kf4 Kxb3 44. h5 gxh5 45. gxh5 Be8 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.09"]
[Round "9"]
[White "Groenhuis, Vincent"]
[Black "Van der Vegt, Lenze"]
[Result "0-1"]
[ECO "B40"]
[PlyCount "64"]
[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 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. c4 Ne7 7. Nc3 Nbc6 8. Be2 0-0 9. Bf4 f5 10. Bd6 Bc7 11. f4 Bxd6 12. Qxd6 fxe4 13. Nxe4 Nf5 14. Qd2 d5 15. cxd5 exd5 16. Ng5 h6 17. Nf3 Kh8 18. 0-0 Qb6+ 19. Kh1 Ne3 20. Rfe1 Ng4 21. Nfd4 Nf2+ 22. Kg1 Ne4 23. Qe3 Bd7 24. Rf1 Rae8 25. Bh5 Re7 26. Qd3 Nd6 27. Kh1 Re4 28. Nxc6 bxc6 29. g3 Bf5 30. g4 Re3 31. Qd4 Be4+ 32. Kg1 Rxb3 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.08"]
[Round "8"]
[White "Heltzel, Joost"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "51"]
[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. g3 g6 3. Bg2 Bg7 4. 0-0 d6 5. d3 0-0 6. e4 Nc6 7. Nbd2 Nh5 8. Ne1 Qe8 9. f4 f5 10. c3 e5 11. fxe5 Nxe5 12. exf5 Bxf5 13. Qb3+ Kh8 14. Qxb7 Ng4 15. Nc4 Qe2 16. Bf4 Bxd3 17. Nxd3 Qxd3 18. Qd5 Nxf4 19. Rxf4 Qxd5 20. Rxf8+ Rxf8 21. Bxd5 Ne5 22. Nxe5 Bxe5 23. Re1 Rb8 24. Bb3 Kg7 25. Re4 c5 26. Kf1 1/2-1/2

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.07"]
[Round "7"]
[White "Groenhuis, Vincent"]
[Black "Kommer, Bas"]
[Result "0-1"]
[ECO "B77"]
[PlyCount "56"]
[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. f3 0-0 8. Be3 Nc6 9. Qd2 Bd7 10. Nd5 Rc8 11. Bb3 Ne5 12. g4 Nxf3+ 13. Nxf3 Nxe4 14. Qd3 Nc5 15. Bxc5 Rxc5 16. 0-0-0 Bxg4 17. Rde1 e6 18. Nc3 d5 19. Ne5 Bf5 20. Qd4 Qc7 21. h4 Rc8 22. h5 b5 23. a3 a5 24. hxg6 hxg6 25. Re2 b4 26. axb4 axb4 27. Na4 Bxc2 28. Nxc5 Bxb3 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.06"]
[Round "6"]
[White "Groenhuis, Vincent"]
[Black "Molinari, Gabriel"]
[Result "0-1"]
[ECO "B02"]
[BlackElo "2099"]
[PlyCount "96"]
[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 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. d4 g6 5. Nf3 Bg7 6. Be2 Nxc3 7. bxc3 0-0 8. 0-0 b6 9. Bf4 Bb7 10. Qd2 Nd7 11. Rad1 Nf6 12. c4 Rc8 13. c3 c5 14. Qc2 cxd4 15. cxd4 Nh5 16. Be3 Qc7 17. Rc1 Nf4 18. Rfd1 Nxe2+ 19. Qxe2 Ba6 20. Nd2 Rfd8 21. Qd3 Qd7 22. Nf3 Qa4 23. Nd2 Rd7 24. Qb3 Qxb3 25. axb3 Bxd4 26. Bf4 Rcd8 27. Kf1 b5 28. Ke2 bxc4 29. bxc4 Bf6 30. Rc2 Kg7 31. Rb1 Rc8 32. Be3 Rc6 33. g4 Bd4 34. Bf4 Re6+ 35. Kf1 h6 36. h4 Bf6 37. g5 hxg5 38. hxg5 Be5 39. Be3 Bd4 40. Bf4 Rc6 41. Ke2 Rd5 42. Kf3 Rf5 43. Kg4 Bxf2 44. Ne4 Bd4 45. Rh1 e5 46. Bc1 Bc8 47. Kg3 Rb6 48. Nf6 Rb3+ 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.05"]
[Round "5"]
[White "Pouw, Pieter"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "59"]
[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 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Bxf6 gxf6 10. Nd5 f5 11. Bd3 Be6 12. c3 Bg7 13. 0-0 f4 14. Nc2 Bxd5 15. exd5 Ne7 16. a4 bxa4 17. Rxa4 a5 18. Qh5 Ng6 19. Bb5+ Kf8 20. Rfa1 Qb6 21. Bc6 Rb8 22. b4 e4 23. R1a3 f3 24. Rxa5 Nf4 25. Qf5 Nd3 26. Ne3 Bh6 27. Ra7 Ne5 28. Qf6 Bg7 29. Qxd6+ Kg8 30. Ra8 1-0

[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 "Groenhuis, Vincent"]
[Black "Stange, Sven"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "54"]
[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 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. 0-0 Nc6 8. Re1 Bg4 9. c3 f5 10. Nbd2 Qd6 11. Qc2 0-0 12. b4 a6 13. a4 Qg6 14. Qb3 Kh8 15. Ba3 Bg5 16. Nxe4 fxe4 17. Nxg5 exd3 18. Bc1 h6 19. f3 Bc8 20. h4 hxg5 21. Bxg5 Be6 22. Qd1 Rae8 23. g4 Bd7 24. Be3 Nd8 25. h5 Qf6 26. f4 Qh4 27. Qxd3 Qg3+ 0-1

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.02"]
[Round "2"]
[White "Rijnaarts, Sjef"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "63"]
[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 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Qa5+ 10. Bd2 Qd8 11. Bd3 Be6 12. c4 bxc4 13. Qa4 Rc8 14. Nxf6+ gxf6 15. Bxc4 Qd7 16. Bxa6 Ra8 17. Rc1 Nd4 18. Qxd7+ Kxd7 19. Bc4 Bxc4 20. Nxc4 Rxa2 21. Be3 Nb3 22. Rd1 Ke6 23. f4 f5 24. fxe5 dxe5 25. exf5+ Kxf5 26. 0-0+ Ke6 27. Rd8 Bg7 28. Rd6+ Ke7 29. Bg5+ f6 30. Rfxf6 Rb8 31. Rf1+ Ke8 32. Re6+ 1-0

[Event "NED-ch U20"]
[Site "Leiden"]
[Date "2000.05.01"]
[Round "1"]
[White "Groenhuis, Vincent"]
[Black "Vinck, Martin"]
[Result "0-1"]
[ECO "B86"]
[PlyCount "116"]
[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 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 Nbd7 8. Be3 b5 9. a3 Nc5 10. f3 Qc7 11. Qd2 Be7 12. g4 Rb8 13. g5 Nfd7 14. Kf2 Bb7 15. Rad1 Nb6 16. Ncxb5 axb5 17. Nxb5 Qc6 18. Nxd6+ Bxd6 19. Qxd6 Nbd7 20. Bf4 Rc8 21. Ba2 Qxd6 22. Bxd6 Nb6 23. Rd2 Nba4 24. Ke3 Nxb2 25. Bxc5 Rxc5 26. Rb1 Rb5 27. a4 Nc4+ 28. Bxc4 Rxb1 29. Bb5+ Rxb5 30. axb5 Ke7 31. c4 Rc8 32. Rc2 Kd6 33. Kd4 e5+ 34. Kc3 Kc5 35. Rd2 Rc7 36. Rd8 Re7 37. h4 h6 38. gxh6 gxh6 39. Rh8 Re6 40. Rb8 Rf6 41. Rxb7 Rxf3+ 42. Kd2 Kxc4 43. b6 Rb3 44. Kc2 Rb5 45. Rc7+ Kd4 46. b7 f6 47. Rf7 Kxe4 48. Rxf6 Rxb7 49. Rxh6 Ke3 50. h5 e4 51. Ra6 Ke2 52. Kc3 e3 53. h6 Rd7 54. Ra1 Kf2 55. Ra8 Rf7 56. Ra2+ e2 57. Kd3 Rf3+ 58. Ke4 Rh3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Bouwhuis, Michiel"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "A36"]
[PlyCount "43"]
[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. c4 Nc6 3. Nc3 Nf6 4. Nge2 d6 5. g3 g6 6. Bg2 Bg7 7. 0-0 0-0 8. d3 Bd7 9. Rb1 a6 10. a4 Qc7 11. f4 e5 12. f5 Nd4 13. g4 h6 14. h4 Nh7 15. Nxd4 cxd4 16. Nd5 Qd8 17. g5 hxg5 18. hxg5 Nxg5 19. f6 Bh6 20. Qe1 Nh3+ 21. Bxh3 Bxc1 22. Qh4 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Ammerlaan, Richard"]
[Result "1/2-1/2"]
[ECO "B78"]
[PlyCount "88"]
[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. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. f3 0-0 8. Be3 Nc6 9. Qd2 Bd7 10. 0-0-0 Rc8 11. Bb3 Ne5 12. Kb1 Nc4 13. Bxc4 Rxc4 14. Nd5 Nxd5 15. exd5 Qc7 16. g4 Rc8 17. c3 b5 18. h4 Qb7 19. h5 b4 20. cxb4 Qxb4 21. hxg6 hxg6 22. Qh2 Rc2 23. Qxc2 Rxc2 24. Kxc2 Qc4+ 25. Kb1 Qxd5 26. Rhf1 a5 27. Nb3 Qb5 28. Bd4 a4 29. Bxg7 Kxg7 30. Nd4 Qb4 31. Rfe1 a3 32. Nb3 Be6 33. Re3 axb2 34. Kxb2 Qf4 35. Rc3 Qe5 36. a4 Qe2+ 37. Rd2 Qa6 38. Ka3 Bd7 39. Rd4 e5 40. Rb4 Kf6 41. a5 Bb5 42. Rc7 Ke6 43. Rc5 Be2 44. Rc3 Bb5 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Kowalczyk, Stefan"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "115"]
[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. Nxe5 d6 4. Nf3 Nxe4 5. d3 Nf6 6. Nc3 d5 7. Bf4 Bb4 8. a3 Ba5 9. b4 Bb6 10. Be2 a5 11. 0-0 axb4 12. axb4 Rxa1 13. Qxa1 0-0 14. Bg5 c6 15. Na4 Nbd7 16. c4 h6 17. Nxb6 Qxb6 18. Bd2 Re8 19. Re1 dxc4 20. dxc4 Ne4 21. c5 Qc7 22. Be3 Ndf6 23. Bd4 Qf4 24. Ne5 Nxf2 25. Bc4 Rxe5 26. Bxe5 Qxc4 27. Kxf2 Ng4+ 28. Kg1 Qxb4 29. Qc3 Qxc3 30. Bxc3 Be6 31. h3 Nf6 32. Bxf6 gxf6 33. Rb1 Bc8 34. Ra1 Kg7 35. Ra8 Be6 36. Rb8 Bd5 37. Rxb7 Kg6 38. Kf2 Kg7 39. Rd7 Bc4 40. Rd6 Bb5 41. Ke3 Kg6 42. Kf4 Ba4 43. g3 h5 44. g4 hxg4 45. Kxg4 Bb5 46. Kf4 Ba4 47. Rd2 Bb5 48. Rg2+ Kh5 49. Kf5 Kh4 50. Kxf6 Kxh3 51. Rg7 Bc4 52. Rxf7 Bd5 53. Rc7 Kg4 54. Ke5 Kf3 55. Kd6 Ke4 56. Rxc6 Kd4 57. Rb6 Bg2 58. c6 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Rijnaarts, Sjef"]
[Result "1-0"]
[ECO "B45"]
[PlyCount "100"]
[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. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 Bb4 7. f3 d5 8. Bb5 Bd7 9. Bxc6 bxc6 10. e5 Ng8 11. a3 Ba5 12. Nb3 Bb6 13. Qe2 Ne7 14. g4 Ng6 15. 0-0-0 Bxe3+ 16. Qxe3 Qb6 17. Qe2 c5 18. h4 h5 19. f4 Rb8 20. f5 Ne7 21. f6 c4 22. fxe7 cxb3 23. cxb3 Qxb3 24. Rhf1 Kxe7 25. Qf2 Kd8 26. Rd2 Be8 27. Qc5 Qb6 28. Qxb6+ axb6 29. g5 Ke7 30. Rdf2 Rc8 31. Kd2 Rc4 32. Rf4 Rxf4 33. Rxf4 Bc6 34. Kd3 Rf8 35. Rb4 Rb8 36. a4 Rb7 37. Rf4 b5 38. axb5 Bxb5+ 39. Nxb5 Rxb5 40. Kc3 Rb7 41. Rb4 Rxb4 42. Kxb4 f5 43. exf6+ gxf6 44. g6 f5 45. Kc3 f4 46. b4 e5 47. b5 f3 48. Kd2 Kf6 49. b6 Kxg6 50. b7 Kf5 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenhuis, Vincent"]
[Black "Sewambar, Ashwin"]
[Result "0-1"]
[ECO "B10"]
[PlyCount "70"]
[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 c6 2. c4 d5 3. Nc3 d4 4. Nce2 e5 5. d3 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 Be6 8. f4 f6 9. Nf3 Nd7 10. g3 Nh6 11. h3 b5 12. b3 bxc4 13. bxc4 Rb8 14. Bg2 Qb6 15. 0-0 Qb2 16. Rab1 Qxb1 17. Rxb1 Rxb1+ 18. Kf2 0-0 19. Qa5 g5 20. Qxa7 g4 21. Nh2 gxh3 22. Bf3 Rd1 23. Qa4 Rxd3 24. Qxc6 Re8 25. g4 Re7 26. Qd6 Kf8 27. c5 Nf7 28. Qc7 Rd2 29. c6 Rc2 30. a4 d3 31. a5 d2 32. a6 d1Q 33. a7 Qd4+ 34. Kg3 Qa4 35. Qb7 Re8 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Molinari, Gabriel"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B24"]
[PlyCount "67"]
[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 e6 3. g3 Nc6 4. Bg2 Nf6 5. f4 d6 6. Nf3 Be7 7. 0-0 0-0 8. d3 Bd7 9. h3 Nd4 10. g4 e5 11. f5 Bc6 12. Ne2 Nxf3+ 13. Bxf3 d5 14. g5 Ne8 15. exd5 Bxd5 16. Bxd5 Qxd5 17. Be3 Nc7 18. f6 Bd6 19. Ng3 Ne6 20. Qh5 Rfe8 21. Ne4 g6 22. Qh4 Rad8 23. Rf2 Kh8 24. Qg4 h5 25. gxh6 Kh7 26. h4 Bc7 27. Rg2 Nf4 28. Bxf4 exf4 29. h5 Rg8 30. Ng5+ Kxh6 31. hxg6 Qd4+ 32. Kh1 Qxf6 33. Rh2+ Kg7 34. Rh7+ 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Schoorl, Rob"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B33"]
[PlyCount "46"]
[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. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. Bd3 Be6 13. 0-0 f4 14. Qh5 Rg8 15. Kh1 Rg6 16. c3 Rh6 17. Qf3 Qh4 18. h3 0-0-0 19. Kg1 Be7 20. Be2 Rg8 21. Kh2 Bg4 22. Qd3 Bxe2 23. Qxe2 Rxg2+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Van Dijk, Martin"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B30"]
[PlyCount "62"]
[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. Nf3 Nc6 3. Bc4 e6 4. d3 d5 5. exd5 exd5 6. Bb5 Qa5+ 7. Nc3 d4 8. Bxc6+ bxc6 9. Bd2 dxc3 10. Bxc3 Qd8 11. Ne5 Qd5 12. 0-0 Nf6 13. Re1 Be7 14. Qe2 Be6 15. Qf3 Qxf3 16. gxf3 Rc8 17. Re2 0-0 18. Nxf7 Rxf7 19. Rxe6 Nd5 20. Rae1 Rxf3 21. Rxe7 Nxe7 22. Rxe7 Rf7 23. Re5 Rcf8 24. Be1 Rf5 25. Re7 R8f7 26. Re8+ Rf8 27. Re7 a6 28. Bc3 R8f7 29. Re6 Rxf2 30. Rxc6 R2f5 31. Rxa6 Rg5+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Vinck, Martin"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "45"]
[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. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. g3 fxe4 13. Bg2 Bf5 14. f3 Bg7 15. fxe4 Be6 16. 0-0 0-0 17. c4 Nd4 18. cxb5 axb5 19. Nc2 Nxc2 20. Qxc2 Bxd5 21. exd5 Qd7 22. Be4 h6 23. Kg2 1/2-1/2

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "3"]
[White "De Vlieger, Eileen"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B88"]
[PlyCount "46"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Bc4 d6 7. Bb3 Be7 8. Be3 Bd7 9. f3 0-0 10. Qd2 a6 11. g4 Rc8 12. h4 b5 13. h5 Na5 14. g5 Ne8 15. 0-0-0 Nc4 16. Bxc4 Rxc4 17. g6 h6 18. Bxh6 gxh6 19. Qxh6 Bg5+ 20. Qxg5 Qxg5+ 21. Kb1 Nf6 22. Rdg1 Qh6 23. g7 Rfc8 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "6"]
[White "Groenhuis, Vincent"]
[Black "Ammerlaan, Stefan"]
[Result "1/2-1/2"]
[ECO "C46"]
[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. Nc3 Bc5 4. Nxe5 Nxe5 5. d4 Bxd4 6. Qxd4 d6 7. Bf4 f6 8. Be2 Ne7 9. 0-0 N7c6 10. Qd2 Be6 11. Bg3 Qe7 12. Nd5 Qf7 13. f4 Ng4 14. h3 Nh6 15. Bc4 0-0-0 16. f5 Bxd5 17. Bxd5 Qe7 18. Qc3 Rde8 19. Rfe1 Nd8 20. Rad1 Nhf7 21. Qa5 a6 22. Rd3 Ne5 23. Bxe5 Qxe5 24. Rb3 c6 25. Qc3 Qxc3 26. Rxc3 Kb8 1/2-1/2

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "2"]
[White "Groenhuis, Vincent"]
[Black "Beekhuis, Maarten"]
[Result "0-1"]
[ECO "B48"]
[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 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 Nf6 7. Be2 Be7 8. 0-0 0-0 9. a3 Rd8 10. Ndb5 Qb8 11. f4 d5 12. e5 Nd7 13. Bf3 a6 14. Nd4 Bc5 15. b4 Bb6 16. Qd2 Qa7 17. Nce2 f6 18. Bf2 Ndxe5 19. fxe5 Nxe5 20. Nf4 Nc4 21. Qc3 a5 22. Ndxe6 Bxe6 23. Nxe6 axb4 24. Qxb4 Bxf2+ 25. Rxf2 Re8 26. Bxd5 Ne3 27. Nc7+ Nxd5 28. Nxd5 Re2 29. Nxf6+ Kh8 30. Ng4 h5 31. Qc4 Rae8 32. Raf1 hxg4 33. Qxg4 Rxf2 34. Qh5+ Kg8 35. Qxe8+ Rf8+ 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "7"]
[White "Groenhuis, Vincent"]
[Black "Castellani, Sandro"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "78"]
[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. c3 Nf6 4. d4 exd4 5. e5 Nd5 6. cxd4 Bb4+ 7. Bd2 Bxd2+ 8. Qxd2 d6 9. Bc4 Nb6 10. Bb3 0-0 11. 0-0 Bg4 12. Qf4 Bxf3 13. gxf3 dxe5 14. dxe5 Qd4 15. Qxd4 Nxd4 16. Nd2 Rfe8 17. Rfe1 Nxb3 18. Nxb3 Nc4 19. Rad1 Nxe5 20. Kg2 Nc6 21. Rxe8+ Rxe8 22. Rd7 Re7 23. Rd2 Kf8 24. Nc5 b6 25. Ne4 Ke8 26. Kg3 Rd7 27. Re2 Kd8 28. f4 Nd4 29. Re1 Re7 30. f3 f5 31. Rd1 c5 32. Nc3 Kc8 33. b4 Re3 34. Nd5 Rxf3+ 35. Kg2 Ra3 36. Ne7+ Kc7 37. bxc5 Rxa2+ 38. Kg3 Ra3+ 39. Kf2 bxc5 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "8"]
[White "Groenhuis, Vincent"]
[Black "De Glopper, Maarten"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "41"]
[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. c3 Nf6 4. d4 exd4 5. e5 Nd5 6. Qb3 Nb6 7. cxd4 d5 8. h3 Bd7 9. Bd3 Be7 10. Nc3 Nb4 11. Be2 a5 12. 0-0 a4 13. Qd1 Nc6 14. Bf4 0-0 15. a3 h6 16. Bd3 Bg5 17. Qd2 Re8 18. Nxg5 Nxd4 19. Bh7+ Kf8 20. Qxd4 hxg5 21. Qc5+ 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "5"]
[White "Groenhuis, Vincent"]
[Black "Kowalczyk, Stefan"]
[Result "0-1"]
[ECO "C45"]
[PlyCount "120"]
[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. d4 exd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Nc3 f5 7. Bd3 fxe4 8. Bxe4 Bd7 9. 0-0 Nf6 10. Bf3 Be7 11. Bg5 0-0 12. Re1 d5 13. Bxf6 Bxf6 14. Nxd5 Bxb2 15. Rb1 Ba3 16. Nb4 Rf6 17. Re3 Bxb4 18. Rxb4 Qf8 19. Rb7 Qc8 20. Reb3 Be6 21. Rb2 Bxa2 22. h3 Bc4 23. Qb1 Bb5 24. Bxc6 Rxc6 25. R2xb5 Rb6 26. R7xb6 cxb6 27. Qb3+ Kh8 28. Qf3 Rb8 29. Qf7 a6 30. Rg5 g6 31. Re5 Qf8 32. Qc7 Qd8 33. Qf7 Qd1+ 34. Kh2 Qd6 35. Qf4 Rf8 36. Qe3 Rxf2 37. Kg1 Rf6 38. Re8+ Kg7 39. Re7+ Rf7 40. Qc3+ Kf8 41. Re3 Qf6 42. Qa3+ Kg7 43. Re8 a5 44. Qa4 Qf1+ 45. Kh2 Qf4+ 46. Qxf4 Rxf4 47. Kg3 Rc4 48. Rb8 Rc6 49. Kf3 a4 50. Ra8 b5 51. Ra5 Rc3+ 52. Ke4 Rxc2 53. Rxb5 Rxg2 54. Ra5 Rg3 55. Rxa4 Rxh3 56. Ra7+ Kh6 57. Kf4 Rh5 58. Kg4 Rb5 59. Ra4 Rb7 60. Rc4 Kg7 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "1"]
[White "Groenhuis, Vincent"]
[Black "Leenhouts, Koen"]
[Result "0-1"]
[ECO "C01"]
[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 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. c3 Nf6 6. Bg5 0-0 7. Be2 c6 8. 0-0 Bf5 9. Nbd2 Nbd7 10. Re1 Qc7 11. c4 Ng4 12. g3 f6 13. Be3 Nxe3 14. fxe3 Bh3 15. Bf1 Bg4 16. Bg2 dxc4 17. Nxc4 Bb4 18. Rf1 Kh8 19. Qb3 a5 20. a3 b5 21. axb4 Be6 22. Nfd2 bxc4 23. Qc3 axb4 24. Qxb4 Rab8 25. Qc3 Nb6 26. e4 Rfd8 27. Rfd1 Qd7 28. Nf3 Nc8 29. Rd2 Rb3 30. Qc2 Qb7 31. Ra3 Rxa3 32. bxa3 Na7 33. a4 Rb8 34. Bf1 Qb1 35. Kf2 Qb3 36. Be2 c3 37. Qxb3 Bxb3 38. Rd3 c2 39. Rc3 Bxa4 40. Ne1 Rb2 41. d5 Kg8 42. d6 Kf8 43. Kf1 Ke8 44. Bd3 Kd7 45. Nxc2 Bxc2 46. Bxc2 Nb5 47. Rc4 Na3 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "9"]
[White "Groenhuis, Vincent"]
[Black "Porte, Henrik"]
[Result "1/2-1/2"]
[ECO "D00"]
[PlyCount "99"]
[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. a3 d5 2. d4 c5 3. c3 Nc6 4. Nf3 Bg4 5. e3 Nf6 6. Be2 e6 7. Nbd2 Bd6 8. 0-0 0-0 9. h3 Bh5 10. b3 Rc8 11. Bb2 Qe7 12. c4 b6 13. cxd5 exd5 14. a4 Rfe8 15. Rc1 Rc7 16. Re1 Nb4 17. Ba3 Nc6 18. Rc2 cxd4 19. Bxd6 Qxd6 20. exd4 Bxf3 21. Nxf3 Ne4 22. Bb5 Rec8 23. Qe2 Qf6 24. Rec1 Qd6 25. Qe3 Na5 26. Rxc7 Rxc7 27. Rxc7 Qxc7 28. Ng5 h6 29. Nxe4 dxe4 30. Qxe4 Qc1+ 31. Kh2 Qc7+ 32. g3 Nxb3 33. d5 Qd6 34. Qe8+ Qf8 35. Qxf8+ Kxf8 36. d6 f6 37. Kg2 Nd4 38. Bd7 a6 39. f4 b5 40. Kf2 bxa4 41. Bxa4 Nb5 42. Bxb5 axb5 43. Ke3 b4 44. Kd3 Ke8 45. Kc4 Kd7 46. Kxb4 Kxd6 47. Kc4 Ke6 48. g4 g5 49. f5+ Ke5 50. Kc5 1/2-1/2

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "4"]
[White "Groenhuis, Vincent"]
[Black "Roth, Maarten"]
[Result "1-0"]
[ECO "C44"]
[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 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Nd5 6. cxd4 Be7 7. Bc4 Nb6 8. Bb3 d5 9. h3 Bf5 10. Nc3 h6 11. 0-0 Qd7 12. Bf4 0-0-0 13. Rc1 Rdg8 14. Nb5 Qe6 15. Qe2 a6 16. Nc3 g5 17. Bg3 g4 18. hxg4 Bxg4 19. Rfd1 h5 20. Na4 Nc4 21. Bxc4 dxc4 22. d5 Qg6 23. dxc6 Qxc6 24. Rxc4 Bxf3 25. gxf3 Qg6 26. e6 h4 27. Rxc7+ Kb8 28. Rxb7+ Kxb7 29. Rd7+ Kc6 30. Qxa6# 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "3"]
[White "Groenhuis, Vincent"]
[Black "Werle, Jan"]
[Result "1-0"]
[ECO "B88"]
[PlyCount "81"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e6 7. Bc4 a6 8. Be3 Qc7 9. Bb3 Be7 10. Qd2 0-0 11. 0-0-0 Na5 12. Kb1 b5 13. g4 Nc4 14. Bxc4 Qxc4 15. Qd3 Qc7 16. h4 Nd7 17. g5 b4 18. Nce2 Ne5 19. Qb3 a5 20. f4 Nc4 21. Nb5 Qc6 22. Ned4 Qc5 23. a4 Nxe3 24. Qxe3 Bb7 25. Qd3 Rfd8 26. Rhg1 Bf8 27. f5 e5 28. Nb3 Qb6 29. f6 d5 30. exd5 Rxd5 31. Qg3 Rad8 32. Rxd5 Rxd5 33. fxg7 Bxg7 34. h5 Ba6 35. Qg2 Bxb5 36. axb5 Rd8 37. g6 hxg6 38. hxg6 fxg6 39. Qxg6 Rd1+ 40. Ka2 Rxg1 41. Qxb6 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "4"]
[White "Jongsma, Daan"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "82"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 Be7 10. Bxf6 Bxf6 11. Nc4 Be7 12. Nd5 Be6 13. Nxe7 Kxe7 14. Ne3 Qd7 15. c3 Rhf8 16. Bd3 g6 17. Nd5+ Bxd5 18. exd5 Nd8 19. f4 f5 20. 0-0 Nf7 21. Qe1 Kf6 22. g4 e4 23. Bc2 Rae8 24. Qe3 Kg7 25. g5 Rh8 26. Qd4+ Kg8 27. Rae1 h6 28. Qf6 Kh7 29. Re3 Qe7 30. Qxe7 Rxe7 31. h4 hxg5 32. hxg5 Kg7 33. a4 Ree8 34. Rf2 Rh4 35. Kf1 Reh8 36. Rg3 b6 37. Ke2 Nd8 38. c4 Nb7 39. Rb3 Na5 40. Rxb6 Nxc4 41. Rxa6 e3 1/2-1/2

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "8"]
[White "Muhren, Willem"]
[Black "Groenhuis, Vincent"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "58"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. Bxb5 axb5 13. Nxb5 Qa5+ 14. c3 Kd8 15. Ndc7 Rb8 16. Qd5 Na7 17. b4 Qb6 18. Qxf7 Nxb5 19. Nxb5 Be7 20. a4 fxe4 21. 0-0 Rf8 22. Qxh7 Bf5 23. Qh6 Kd7 24. Rad1 Rg8 25. c4 Rg6 26. Qh5 Rg5 27. Qf7 Be6 28. Qh7 Bf5 29. Qf7 Be6 1/2-1/2

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "7"]
[White "Muris, Paul"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B83"]
[PlyCount "57"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be3 d6 7. Be2 Be7 8. 0-0 0-0 9. f4 e5 10. Nb3 b6 11. Bf3 Bb7 12. Qe2 Qc7 13. Qc4 Rac8 14. Qe2 Rfe8 15. Bg4 Nxg4 16. Qxg4 Nb4 17. Rac1 Bf6 18. Nb5 Qc6 19. fxe5 Rxe5 20. Nxa7 Rxe4 21. Qxc8+ Qxc8 22. Nxc8 Rxe3 23. Nxd6 Bd5 24. Rfe1 Bg5 25. Nf5 Nxa2 26. Rxe3 Bxe3+ 27. Nxe3 Bxb3 28. Ra1 Be6 29. b3 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "5"]
[White "Paulis, Winifred"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B21"]
[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 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 d6 7. 0-0 Nf6 8. Re1 Be7 9. Bg5 0-0 10. Bd3 b6 11. Qc2 Nb4 12. Qd2 Nxd3 13. Qxd3 Bb7 14. Rad1 d5 15. exd5 Nxd5 16. Bxe7 Nxe7 17. Nd4 Nd5 18. Qg3 Qf6 19. Ne4 Qf4 20. Rd3 Qxg3 21. Rxg3 Rfd8 22. Nf3 Rac8 23. h4 Rc2 24. Rd1 Rdc8 25. Nd6 Rc1 26. Rxc1 Rxc1+ 27. Kh2 Bc8 28. Ng5 Nf6 29. Nf3 Bd7 30. h5 Rc2 31. Nd4 Rxb2 32. Ra3 a5 33. Kg1 Ng4 34. Rc3 e5 35. Rc7 exd4 36. Rxd7 h6 0-1

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "2"]
[White "Ten Katen, Koen"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "D66"]
[PlyCount "76"]
[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 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 c6 6. Nf3 0-0 7. Rc1 Nbd7 8. Bd3 h6 9. Bh4 b6 10. 0-0 Bb7 11. Qe2 Rc8 12. Bxf6 Bxf6 13. e4 dxe4 14. Bxe4 Qe7 15. Rfe1 Rfe8 16. Qd3 Rcd8 17. d5 Nc5 18. Qd2 Nxe4 19. Rxe4 cxd5 20. cxd5 Bxc3 21. Rxc3 Rxd5 22. Qe2 Red8 23. Ne1 Rd2 24. Qe3 Bxe4 25. Qxe4 Rxb2 26. a3 Rbd2 27. g3 Qf6 28. Rf3 Qd4 29. Qb7 Qd7 30. Qe4 Rd1 31. Kg2 Qd5 32. Qe3 Qd2 33. Qe4 Qxe1 34. Qxe1 Rxe1 35. Rc3 Ra1 36. f4 Rd2+ 37. Kh3 Raa2 38. Kg4 Rxh2 0-1

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "1"]
[White "Vinck, Martin"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B33"]
[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 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 gxf6 11. Nd5 f5 12. Bd3 fxe4 13. Bxe4 Bb7 14. c3 Be7 15. 0-0 Rb8 16. Nc2 Bg5 17. Qf3 h6 18. a4 Ne7 19. Nf6+ Bxf6 20. Bxb7 Ng6 21. Bxa6 bxa4 22. Nb4 Nh4 23. Qe2 Qa5 24. Rad1 Qc5 25. Rd5 Qb6 26. Rb5 Qc7 27. Nd5 1-0

[Event "NED-ch U14"]
[Site "Leiden"]
[Date "1997.??.??"]
[Round "6"]
[White "Vinck, Martin"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "31"]
[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 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Bxf6 Qxf6 11. Nd5 Qd8 12. Bxb5 axb5 13. Nxb5 Qa5+ 14. c3 Qxb5 15. Nc7+ Kd8 16. Nxb5 1-0

[Event "Hengelo U14 op"]
[Site "Hengelo"]
[Date "1997.??.??"]
[Round "9"]
[White "Wever, Dennis"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B88"]
[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 c5 2. Nc3 Nc6 3. Bc4 e6 4. Nf3 d6 5. d4 cxd4 6. Nxd4 Nf6 7. Be3 Be7 8. 0-0 0-0 9. Nb3 a6 10. f4 b5 11. Bd3 Bb7 12. a3 e5 13. fxe5 dxe5 14. Qf3 Qc7 15. Qg3 Kh8 16. Qh3 Bc8 17. Qg3 Be6 18. Nd5 Nxd5 19. exd5 Bxd5 20. Qh3 e4 21. Be2 Ne5 22. Rac1 Be6 23. Qg3 Bd6 24. Qf2 f5 25. Nd4 Qd7 26. c4 bxc4 27. Bd1 Nd3 28. Qh4 Nxc1 29. Bxc1 Bc5 30. Bc2 Bxd4+ 31. Kh1 Bf6 32. Qh3 Rab8 33. Rd1 Qe7 34. Bd2 Rfd8 35. Bb4 Rxd1+ 36. Bxd1 Rxb4 37. axb4 Qxb4 38. Qe3 Qxb2 39. h3 Qd4 40. Qc1 c3 41. Qb1 Be5 42. g4 Qd3 43. Bc2 Qxh3+ 44. Kg1 Qxg4+ 45. Kf1 Bc4+ 46. Kf2 Qf3+ 47. Kg1 Qg3+ 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "2"]
[White "Groenhuis, Vincent"]
[Black "Muhren, Bianca"]
[Result "0-1"]
[ECO "C47"]
[PlyCount "74"]
[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. Nc3 Nf6 4. Be2 Bc5 5. 0-0 d6 6. d3 Be6 7. Bg5 h6 8. Bh4 Qd7 9. Nd2 0-0-0 10. Na4 Nd4 11. Nxc5 Nxe2+ 12. Qxe2 dxc5 13. c3 Qxd3 14. Qxd3 Rxd3 15. Nf3 Nxe4 16. Nxe5 Rd2 17. Rfe1 Nd6 18. b3 c4 19. b4 Rc2 20. Re3 Nf5 21. Re4 Rxc3 22. Rd1 Nd6 23. Ree1 g5 24. Bg3 Rd8 25. Nf3 Rc2 26. Nd4 Rxa2 27. Nxe6 fxe6 28. Rxe6 c3 29. Rc1 Rb2 30. Be5 Rxb4 31. h3 Nf7 32. Bf6 Rf8 33. Rxc3 Rb6 34. Re7 Rc6 35. Rf3 Nd8 36. Be5 Rxf3 37. gxf3 b5 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "12"]
[White "Groenhuis, Vincent"]
[Black "Tiele, Edwin"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "77"]
[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. Nc3 Nf6 4. Bc4 Bc5 5. d3 h6 6. 0-0 d6 7. h3 0-0 8. Na4 Bb6 9. Nxb6 axb6 10. Re1 Be6 11. Bxe6 fxe6 12. d4 exd4 13. Nxd4 Nxd4 14. Qxd4 e5 15. Qd3 Qd7 16. Be3 Qc6 17. f3 Qd7 18. Qb3+ Kh8 19. a3 Nh7 20. Rad1 Ra5 21. c4 Rf6 22. Rd2 Nf8 23. Red1 Kh7 24. Qb4 Ra4 25. Qc3 Ne6 26. Bxb6 cxb6 27. Rxd6 Qf7 28. Qxe5 Rxc4 29. Rxb6 Rc5 30. Qb8 Rc7 31. Rdd6 Qe7 32. Rxe6 Qc5+ 33. Kh2 h5 34. Rxf6 Qe5+ 35. f4 Qc5 36. Rfe6 Qc1 37. Qf8 Rc8 38. Rh6+ gxh6 39. Rxh6# 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "8"]
[White "Groenhuis, Vincent"]
[Black "Van Deurzen, Ties"]
[Result "1-0"]
[ECO "C42"]
[PlyCount "59"]
[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. Nc3 Nf6 4. Be2 Bb4 5. d3 0-0 6. 0-0 d6 7. Bg5 Be6 8. Nd5 Bc5 9. Nxf6+ gxf6 10. Bh6 Re8 11. Nh4 f5 12. Nxf5 Bxf5 13. exf5 Qf6 14. Qd2 Qxf5 15. h3 Re6 16. Bg4 Qf6 17. Bxe6 Qxe6 18. Qg5+ Qg6 19. Qxg6+ fxg6 20. Be3 Nd4 21. Bxd4 Bxd4 22. c3 Bb6 23. Kh2 Rf8 24. Kg3 Kg7 25. f4 exf4+ 26. Rxf4 Re8 27. Re4 Rxe4 28. dxe4 Kf6 29. Rf1+ Ke6 30. Kg4 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "4"]
[White "Groenhuis, Vincent"]
[Black "Van Elteren, Hugo"]
[Result "1-0"]
[ECO "C55"]
[PlyCount "109"]
[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 Nf6 3. Nc3 Nc6 4. Bc4 Be7 5. 0-0 b6 6. d3 Bb7 7. Ne2 d5 8. exd5 Nxd5 9. Re1 Na5 10. Nxe5 Bf6 11. Nf4 Qd6 12. Neg6+ Kd7 13. Qg4+ Kd8 14. Nxh8 Qd7 15. Qxd7+ Kxd7 16. Bxd5 Rxh8 17. Bxb7 Nxb7 18. c3 Bg5 19. Nd5 Bxc1 20. Raxc1 Nc5 21. Re3 Kd6 22. Nf4 g5 23. Nh5 Kc6 24. Re7 Nxd3 25. Rd1 Nc5 26. Rxf7 Re8 27. Ng3 h5 28. Nxh5 Nd3 29. h3 Nxb2 30. Rdd7 Rc8 31. Kh2 Nc4 32. Rh7 Ne5 33. Rdg7 Nd3 34. Kg3 Rf8 35. Rxc7+ Kb5 36. Rxa7 Rxf2 37. Rhd7 Rd2 38. Ra8 Kc4 39. Rc8+ Kb5 40. a4+ Kxa4 41. Rcd8 Kb3 42. Rxd3 Rxd3+ 43. Rxd3 Kc4 44. Rf3 b5 45. Kg4 Kd5 46. Kxg5 Ke4 47. Ng3+ Ke5 48. h4 Kd5 49. h5 Kc4 50. h6 Kb3 51. h7 Kc2 52. h8Q Kd2 53. c4 b4 54. Qb2+ Ke1 55. Qc1# 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "10"]
[White "Groenhuis, Vincent"]
[Black "Werle, Jan"]
[Result "0-1"]
[ECO "B88"]
[BlackElo "1630"]
[PlyCount "52"]
[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. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bc4 e6 7. 0-0 Be7 8. Be3 0-0 9. f3 a6 10. Qd2 Qc7 11. Rad1 Nxd4 12. Qxd4 Nd7 13. Bb3 b5 14. a4 Rb8 15. axb5 axb5 16. Qb4 Qc6 17. Ra1 Nc5 18. Ra7 Bd8 19. Rfa1 Bb6 20. R7a2 Nxb3 21. Qxb3 Bxe3+ 22. Kh1 Bc5 23. Na4 bxa4 24. Qxb8 Ba6 25. Qxf8+ Kxf8 26. Rxa4 Bb7 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "7"]
[White "Harinck, Albert Jos"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "C55"]
[PlyCount "73"]
[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. Bc4 Nf6 4. d3 h6 5. Be3 Be7 6. c3 0-0 7. b4 d6 8. Qb3 a6 9. a4 Ng4 10. Bd2 Nf6 11. h3 Nh5 12. g3 Nf6 13. Nh4 Rb8 14. Qa2 b5 15. axb5 axb5 16. Bb3 Bd7 17. Ng6 Ra8 18. Na3 Nb8 19. Nxf8 Qxf8 20. Qb2 c6 21. g4 d5 22. f3 d4 23. cxd4 Bxb4 24. Bxf7+ Qxf7 25. Bxb4 exd4 26. Qxd4 Qb3 27. Rb1 Qa2 28. Qb2 Qe6 29. Qb3 Nd5 30. 0-0 Qe5 31. Kg2 Be6 32. exd5 Bxd5 33. Qb2 Qf4 34. Rbe1 Na6 35. Bd2 Qf7 36. Nc2 Rf8 37. Re3 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "11"]
[White "Muris, Paul"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "C29"]
[PlyCount "31"]
[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. Nc3 Nf6 3. f4 exf4 4. e5 Ng8 5. Nf3 Bc5 6. d4 Bb6 7. Bxf4 Ne7 8. Bd3 0-0 9. 0-0 d5 10. a4 a6 11. Kh1 c5 12. Ng5 Ng6 13. Qh5 h6 14. Nxf7 Nxf4 15. Rxf4 Qe7 16. Qg6 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "3"]
[White "Van Dommelen, A."]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "D31"]
[PlyCount "72"]
[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. d4 d5 2. c4 c6 3. Nc3 e6 4. c5 Nd7 5. Be3 Ngf6 6. g3 Be7 7. Bg2 0-0 8. Nf3 b6 9. b4 Bb7 10. 0-0 Re8 11. Qd3 Bf8 12. Na4 b5 13. Nc3 e5 14. Qf5 e4 15. Nh4 Bc8 16. Qf4 Be7 17. Bc1 Nh5 18. Qf5 Ndf6 19. Qg5 h6 20. Qd2 Nh7 21. Qd1 Bxh4 22. gxh4 Qxh4 23. Kh1 Re6 24. f3 Ng3+ 25. Kg1 Nxf1 26. Qxf1 Rg6 27. Kh1 exf3 28. Qxf3 Qe1+ 29. Bf1 Rf6 30. Bb2 Qd2 31. Qg2 Qxb2 32. Rb1 Qxc3 33. e3 Qxe3 34. Be2 Bf5 35. Rg1 Be4 36. Qxe4 Qxe4+ 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "5"]
[White "Van der Smitte, Roy"]
[Black "Groenhuis, Vincent"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1645"]
[PlyCount "69"]
[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. c3 Nc6 3. Nf3 e6 4. d4 b6 5. Bc4 d6 6. 0-0 Nf6 7. Re1 Be7 8. Bf4 0-0 9. Nbd2 d5 10. Bb5 Bb7 11. e5 Nd7 12. Nf1 a6 13. Bd3 cxd4 14. cxd4 Re8 15. a3 f6 16. exf6 Bxf6 17. Be5 Bxe5 18. Nxe5 Ncxe5 19. dxe5 Qg5 20. Qd2 Qh5 21. Ng3 Qf7 22. Qg5 Rf8 23. f3 d4 24. Qh4 g6 25. Qg4 Kh8 26. Qxd4 Rad8 27. Qe3 Nc5 28. Be4 Bxe4 29. Nxe4 Rd3 30. Qe2 Rfd8 31. Nxc5 bxc5 32. Rad1 Qa7 33. Rxd3 Rxd3 34. Qxd3 c4+ 35. Qe3 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "9"]
[White "Visser, Richard"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "74"]
[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. d4 exd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 Be7 7. h3 Nf6 8. 0-0 0-0 9. Qe2 Be6 10. Bd3 Re8 11. b3 d5 12. exd5 Bxd5 13. Rd1 Bb4 14. Qc2 Bxc3 15. Qxc3 Re6 16. Bf4 Ne4 17. Bxe4 Rxe4 18. Bc1 Qd6 19. Bb2 f6 20. Rd2 Rd8 21. Rad1 Ne7 22. Ne1 Qe6 23. Nc2 c6 24. Ne3 Rh4 25. Nf1 Ng6 26. Qg3 Re8 27. Ne3 Rh5 28. Qg4 Qxg4 29. Nxg4 Nf4 30. f3 Nxh3+ 31. Kf1 Nf4 32. Kf2 Kf7 33. Ne3 Kg6 34. Rd4 Kg5 35. Nxd5 Re2+ 36. Kg1 Rxg2+ 37. Kf1 Rh1# 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1995.??.??"]
[Round "1"]
[White "Voortman, Jasper"]
[Black "Groenhuis, Vincent"]
[Result "0-1"]
[ECO "B40"]
[PlyCount "60"]
[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 e6 4. Bd3 d6 5. b3 Nf6 6. Ba3 Be7 7. Rb1 0-0 8. Qc1 a6 9. h3 b5 10. Bxb5 axb5 11. Nxb5 Nxe4 12. c4 Qa5 13. b4 cxb4 14. Bxb4 Nxb4 15. a3 Nd3+ 16. Kd1 Nxc1 17. Kxc1 Nxf2 18. Rf1 Nd3+ 19. Kd1 Qa4+ 20. Ke2 Qxc4 21. Nc3 Rxa3 22. Rb8 Ba6 23. Rxf8+ Bxf8 24. Nb1 Nc1+ 25. Kf2 Qxf1+ 26. Kg3 Ne2+ 27. Kg4 Qxb1 28. Ng5 Qf5+ 29. Kh4 Ra4+ 30. Kh5 Ng3# 0-1

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1994.??.??"]
[Round "12"]
[White "Groenhuis, Vincent"]
[Black "Tiele, Edwin"]
[Result "1-0"]
[ECO "C65"]
[PlyCount "47"]
[EventDate "1994.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[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. Bb5 Bc5 5. 0-0 a6 6. Bxc6 dxc6 7. Nxe5 0-0 8. d3 Re8 9. Nf3 Ng4 10. d4 Bd6 11. h3 Nh6 12. Bxh6 gxh6 13. e5 Bf8 14. Qd3 f6 15. Rad1 Qe7 16. Rfe1 Qg7 17. exf6 Rxe1+ 18. Rxe1 Qxf6 19. Ne5 Bd6 20. Re3 Bf5 21. Qe2 Re8 22. Rg3+ Kh8 23. f4 Qh4 24. Nf7# 1-0

[Event "NED-ch U12"]
[Site "Hengelo"]
[Date "1994.??.??"]
[Round "8"]
[White "Groenhuis, Vincent"]
[Black "Tilburgs, William"]
[Result "1-0"]
[ECO "C55"]
[PlyCount "61"]
[EventDate "1994.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[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. Nc3 Nxe4 5. Bxf7+ Kxf7 6. Nxe4 h6 7. 0-0 Be7 8. d4 Bd6 9. dxe5 Nxe5 10. Nxe5+ Bxe5 11. Qd5+ Kg6 12. Qxe5 Re8 13. Qg3+ Kh7 14. Nc3 d6 15. Bf4 Bf5 16. Rac1 Re6 17. Qf3 c6 18. Bxd6 Bxc2 19. Rxc2 Qxd6 20. g3 Rf6 21. Qe4+ Kh8 22. Rd1 Qc5 23. Rcd2 Rff8 24. Qd4 Qxd4 25. Rxd4 c5 26. Rd7 b6 27. Re7 Kg8 28. Rdd7 Rae8 29. Rxg7+ Kh8 30. Rh7+ Kg8 31. Rdg7# 1-0

