[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.09"]
[Round "9"]
[White "Witkamp, Jarno"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "A11"]
[PlyCount "115"]
[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 c6 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 cxd5 5. g3 Nc6 6. Bg2 e6 7. d3 Bd6 8. 0-0 0-0 9. a3 Re8 10. b4 a6 11. Bd2 Bd7 12. Rc1 Rc8 13. Na4 Ne5 14. Nc5 Nxf3+ 15. Bxf3 Bc6 16. Rc2 Qc7 17. Qb1 Nd7 18. Nb3 Ne5 19. Bg2 Qb8 20. Rfc1 Ba4 21. Rxc8 Rxc8 22. Nc5 Bb5 23. a4 Be8 24. Rc2 Nd7 25. d4 Nb6 26. a5 Nc4 27. Bc1 Bc6 28. e4 Qa7 29. Bf1 Bb5 30. e5 Be7 31. Rc3 b6 32. axb6 Qxb6 33. Rb3 h6 34. Bd3 Qc6 35. f4 f5 36. g4 g6 37. Qa2 Kf7 38. Qg2 a5 39. bxa5 Bxc5 40. dxc5 Qxc5+ 41. Qf2 Qc6 42. Qa7+ Rc7 43. Qb8 Nxa5 44. Ba3 Rc8 45. Qa7+ Rc7 46. Qxa5 Bxd3 47. Rxd3 Qc2 48. Qb5 Qe2 49. Rb3 Qxg4+ 50. Rg3 Qxf4 51. Qb8 Qd4+ 52. Kg2 Rc2+ 53. Kh3 Rxh2+ 54. Kxh2 Qf2+ 55. Kh3 Qf1+ 56. Rg2 Qf3+ 57. Kh2 Qf4+ 58. Rg3 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "8"]
[White "In't Groen, Erik"]
[Black "Artels, Lieven"]
[Result "0-1"]
[ECO "C54"]
[PlyCount "42"]
[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 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. b4 Bb6 7. a4 a6 8. 0-0 0-0 9. Nbd2 Bg4 10. Re1 Qd7 11. Nf1 Ne7 12. Bg5 Ne8 13. h3 Be6 14. Bb3 h6 15. Bh4 Ng6 16. Bg3 Nf6 17. Qc2 Nh5 18. Rad1 Ngf4 19. d4 Nxg3 20. Nxg3 Bxh3 21. gxh3 Qxh3 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.08"]
[Round "7"]
[White "Van den Bergh, Peter"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B07"]
[PlyCount "75"]
[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 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qa5 5. Bd3 e5 6. fxe5 dxe5 7. dxe5 Ng4 8. Bf4 Nxe5 9. Bxe5 Qxe5 10. Nf3 Qc7 11. Qd2 Bb4 12. 0-0-0 Qa5 13. Bc4 0-0 14. Ng5 Bxc3 15. bxc3 Nd7 16. Nxf7 Rxf7 17. Rhf1 Qa3+ 18. Kb1 Ne5 19. Qf4 Qb2+ 20. Kxb2 Nxc4+ 21. Kb3 Rxf4 22. Rd8+ Kf7 23. Rxf4+ Ke7 24. Rff8 Nb6 25. Kb2 a5 26. Rde8+ Kd7 27. e5 a4 28. e6+ Kd6 29. e7 Kd7 30. Kc1 h6 31. Kd1 a3 32. c4 c5 33. Ke2 Rb8 34. Kf3 Ra8 35. h4 g5 36. hxg5 hxg5 37. g4 Rb8 38. Rg8 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.07"]
[Round "6"]
[White "In't Groen, Erik"]
[Black "Uithof, Kasper"]
[Result "1-0"]
[ECO "B76"]
[PlyCount "79"]
[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 d6 5. Be2 g6 6. Nc3 Bg7 7. Be3 Nf6 8. f3 0-0 9. Qd2 Bd7 10. 0-0-0 Rc8 11. h4 Nh5 12. g4 Ng3 13. Rhg1 Nxe2+ 14. Ncxe2 Ne5 15. b3 Qc7 16. h5 a6 17. Rh1 Nxf3 18. Nxf3 Bxg4 19. Ne1 Bxh5 20. Bh6 Bxe2 21. Qxe2 Qc3 22. Bxg7 Qxg7 23. Kb1 Rc3 24. Nd3 Rfc8 25. Rd2 Kf8 26. Qg4 h5 27. Qf4 g5 28. Qf5 e6 29. Qh3 h4 30. Rg2 Qh7 31. Qf3 R8c5 32. Rhg1 Qg6 33. Rh1 Qh7 34. Qf6 Qxe4 35. Rf1 Rf5 36. Rxf5 exf5 37. Qd8+ Qe8 38. Qxd6+ Qe7 39. Qh6+ Ke8 40. Qh8+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "4"]
[White "In't Groen, Erik"]
[Black "Nabuurs, Joep"]
[Result "0-1"]
[ECO "C54"]
[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. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nf3 Bc5 5. c3 d6 6. b4 Bb6 7. a4 a5 8. b5 Ne7 9. h3 0-0 10. 0-0 h6 11. Re1 c6 12. bxc6 bxc6 13. Be3 Rb8 14. Nbd2 Bxe3 15. fxe3 d5 16. Ba2 dxe4 17. dxe4 Ng6 18. Qc2 Qe7 19. Rab1 Ba6 20. Bc4 Bxc4 21. Nxc4 Qc5 22. Nfd2 Rfd8 23. Rxb8 Rxb8 24. Rb1 Rxb1+ 25. Qxb1 Kh7 26. Qb6 Nxe4 27. Qxc5 Nxc5 28. Nxa5 Nxa4 29. Nxc6 Nxc3 30. Kf2 f6 31. Nb4 Ne7 32. Nc2 Kg6 33. Kf3 Kf5 34. Ne1 e4+ 35. Nxe4 Nxe4 36. g4+ Kg5 37. Kxe4 Kh4 38. Kf3 Kxh3 39. Ng2 g5 40. e4 Ng6 41. Ne3 Ne5+ 42. Ke2 Nxg4 43. Nf5 h5 44. Kf3 h4 45. Nd4 Ne5+ 46. Kf2 g4 47. Kf1 Kh2 48. Nc2 g3 49. Ne1 h3 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.06"]
[Round "5"]
[White "Wakkee, Colijn"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "D60"]
[PlyCount "87"]
[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 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Nbd7 6. e3 Be7 7. Qc2 0-0 8. Bd3 dxc4 9. Bxc4 b5 10. Bd3 a6 11. 0-0 c5 12. dxc5 Bxc5 13. Bxh7+ Kh8 14. Rfd1 Qb6 15. Be4 Bb7 16. Bxf6 Nxf6 17. Bxb7 Qxb7 18. Ng5 g6 19. Nce4 Be7 20. Qc3 Kg7 21. Qe5 Rfd8 22. h4 Rac8 23. Qf4 Rd5 24. Rxd5 Qxd5 25. Qf3 Qf5 26. Nc3 Qxf3 27. Nxf3 b4 28. Na4 Rc2 29. Nd4 Rd2 30. Nb3 Rc2 31. Rc1 Rxc1+ 32. Nxc1 Ng4 33. g3 Ne5 34. Kf1 Kf8 35. Ke2 Ke8 36. Nb3 Nc6 37. Nac5 Bd8 38. Nxa6 Bf6 39. a3 bxa3 40. bxa3 Bc3 41. Nac5 Na5 42. Ne4 Nxb3 43. Nxc3 Nc5 44. g4 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "2"]
[White "In't Groen, Erik"]
[Black "Wuijts, Johan"]
[Result "1-0"]
[ECO "C08"]
[PlyCount "83"]
[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 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nc6 6. Bb5 Nf6 7. 0-0 Be7 8. dxc5 Bxc5 9. Nb3 Be7 10. h3 0-0 11. c3 Bf5 12. Nbd4 Bd7 13. Nxc6 bxc6 14. Bd3 h6 15. Bf4 Nh5 16. Bh2 Nf6 17. Re1 Be6 18. Ne5 Qb6 19. Qc2 Rad8 20. Ng6 Rfe8 21. Nxe7+ Rxe7 22. Rad1 Rde8 23. Re2 c5 24. Qc1 d4 25. c4 Nd7 26. Rde1 Nb8 27. Qf4 Nc6 28. Qc1 Nb4 29. Bb1 d3 30. Rd2 Rd8 31. a3 Nc6 32. Rxd3 Rxd3 33. Bxd3 Rb7 34. Qe3 Re7 35. Bd6 Re8 36. Bxc5 Qxb2 37. Qe4 g6 38. Qxc6 Rc8 39. Qd6 Qf6 40. Bd4 Rd8 41. Bxf6 Rxd6 42. Rb1 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.05"]
[Round "3"]
[White "Smits, Sebastiaan"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B90"]
[PlyCount "46"]
[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. f3 e5 7. Nb3 Be6 8. Be3 Nbd7 9. Qd2 b5 10. a3 Nb6 11. Qf2 Rb8 12. Nd2 Qc7 13. Bd3 Nc4 14. Bxc4 Bxc4 15. Nxc4 bxc4 16. Rb1 Be7 17. 0-0 0-0 18. g4 Bd8 19. g5 Nd7 20. Nd5 Qc6 21. Kh1 f5 22. Qh4 f4 23. Bf2 Rf7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2003.08.04"]
[Round "1"]
[White "Van Run, Rieke"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B26"]
[WhiteElo "2142"]
[PlyCount "79"]
[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. Nc3 d6 3. g3 Nc6 4. Bg2 e5 5. d3 g6 6. Nge2 Bg7 7. 0-0 Nge7 8. Be3 0-0 9. Qd2 Nd4 10. Nd1 Be6 11. c3 Nxe2+ 12. Qxe2 Nc6 13. f4 Qd7 14. Nf2 f5 15. a3 b6 16. Rad1 Qc7 17. Nh3 h6 18. Qd2 Kh7 19. Nf2 Rad8 20. Bh3 d5 21. exd5 Rxd5 22. Qe2 Rdd8 23. Bg2 Ne7 24. Rfe1 c4 25. fxe5 cxd3 26. Nxd3 Nc6 27. Bxc6 Qxc6 28. Bd4 g5 29. Rd2 Rf7 30. h3 Bf8 31. Kh2 Be7 32. Qe3 Rdf8 33. Rf2 Kg6 34. Rg1 h5 35. h4 Bd8 36. hxg5 Bxg5 37. Nf4+ Kh6 38. Qe2 Bxf4 39. gxf4 Qc7 40. Rg5 1-0

[Event "CER tt"]
[Site "Roosendaal"]
[Date "2003.03.29"]
[Round "2.1"]
[White "Talon, Alain"]
[Black "In't Groen, Erik"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "2095"]
[PlyCount "114"]
[EventDate "2003.03.29"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 093 Extra"]
[Source "ChessBase"]
[SourceDate "2003.05.09"]
[SourceVersion "1"]
[SourceVersionDate "2003.05.09"]
[SourceQuality "1"]

1. b3 d5 2. e3 c5 3. Bb2 Nc6 4. Nf3 Nf6 5. Be2 Bg4 6. a3 e6 7. d3 Be7 8. Nbd2 b5 9. h3 Bh5 10. g4 Bg6 11. Ne5 Nxe5 12. Bxe5 Bd6 13. Bb2 h6 14. Bf3 Rc8 15. e4 dxe4 16. dxe4 Bf4 17. e5 Qxd2+ 18. Qxd2 Bxd2+ 19. Kxd2 Rd8+ 20. Kc1 Nd5 21. Rd1 0-0 22. Bxd5 Rxd5 23. Rxd5 exd5 24. f4 Be4 25. b4 c4 26. Bd4 a6 27. Kd2 Bg2 28. h4 Bf3 29. Rg1 Be4 30. c3 Ra8 31. Bb6 Rb8 32. Bc5 Ra8 33. f5 a5 34. Ke3 axb4 35. Bxb4 Re8 36. Kd4 h5 37. f6 hxg4 38. Rxg4 g6 39. Bd6 Bf5 40. Rg5 Be6 41. Kc5 Ra8 42. Kxb5 Kh7 43. Kb6 d4 44. cxd4 c3 45. Rg1 Rc8 46. Rc1 Rc4 47. Bb4 Rxd4 48. Rxc3 Rxh4 49. Kc7 Re4 50. Kd6 g5 51. Rc5 Kg6 52. Rc2 Kf5 53. Rc3 Kg6 54. Rg3 Kh5 55. Rg1 g4 56. Rf1 Kh4 57. Rg1 Rxb4 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.10"]
[Round "9"]
[White "Oude, Alink Mark"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B99"]
[PlyCount "52"]
[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 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. Bd3 b5 11. Rhe1 Bb7 12. g4 b4 13. Nce2 Nc5 14. Ng3 Rc8 15. Kb1 Bc6 16. Nxc6 Qxc6 17. Qe2 0-0 18. Nh5 Nxh5 19. gxh5 Bxg5 20. fxg5 Nxd3 21. cxd3 Qd7 22. h6 g6 23. Rf1 e5 24. Rf6 Qe7 25. Qe1 a5 26. d4 Rfd8 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "8"]
[White "In't Groen, Erik"]
[Black "Van den Bergh, Peter"]
[Result "0-1"]
[ECO "C54"]
[PlyCount "60"]
[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. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 h6 14. Qe2 hxg5 15. Re1 Be6 16. dxe6 f6 17. Re3 c6 18. Rh3 Rxh3 19. gxh3 g6 20. Qf3 Qa5 21. Rd1 Qf5 22. Qxf5 Nxf5 23. b4 Ke7 24. Re1 Rh8 25. Bd3 Rxh3 26. Bf1 Ra3 27. Bc4 Ra4 28. Rb1 d5 29. Bd3 Rxa2 30. b5 c5 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "7"]
[White "Konijn, Bart"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B99"]
[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. 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 Nbd7 10. g4 b5 11. Bxf6 Nxf6 12. g5 Nd7 13. f5 Bxg5+ 14. Kb1 Ne5 15. Qh5 Bf6 16. Nxe6 Bxe6 17. fxe6 g6 18. Nd5 Qd8 19. exf7+ Kxf7 20. Qe2 Bg5 21. Bh3 Kg7 22. Rhf1 Ra7 23. Qf2 Rf7 24. Qd4 Rhf8 25. Rxf7+ Rxf7 26. Be6 Rf8 27. Qa7+ Kh6 28. Qxa6 Rf2 29. h3 Nc4 30. Qxb5 Nd2+ 31. Ka1 Nxe4 32. Qc6 Nc5 33. Nc7 Rxc2 34. Kb1 Rd2 35. Rxd2 Bxd2 36. Kc2 Ba5 37. b4 Bxb4 38. Bg4 Qf6 39. Qf3 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.08"]
[Round "6"]
[White "In't Groen, Erik"]
[Black "Van der Molen, Jarich"]
[Result "1-0"]
[ECO "B76"]
[PlyCount "43"]
[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 g6 5. Nc3 Nf6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Re8 9. Bc4 a6 10. g4 b5 11. Bb3 Bb7 12. h4 Nc6 13. h5 Na5 14. hxg6 hxg6 15. 0-0-0 Nxb3+ 16. Nxb3 b4 17. Nd5 Nxd5 18. exd5 Rc8 19. Bh6 Bh8 20. Bf8 Rxc2+ 21. Kxc2 Qc7+ 22. Kb1 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "5"]
[White "Huebner, Werner"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B86"]
[PlyCount "72"]
[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 a6 6. Bc4 e6 7. Be3 Nbd7 8. f3 b5 9. Bb3 Nc5 10. Qd2 Qc7 11. 0-0 Be7 12. Nde2 0-0 13. Nf4 Rd8 14. Rad1 Bd7 15. Kh1 Rac8 16. Qf2 Qc6 17. Rd2 b4 18. Nfe2 bxc3 19. Nxc3 Nxb3 20. axb3 Rb8 21. Rfd1 Be8 22. Bg5 Ng4 23. Qh4 Bxg5 24. Qxg5 Nh6 25. e5 d5 26. Ne4 Nf5 27. g4 h6 28. Qh4 g6 29. Qh3 Kg7 30. gxf5 exf5 31. Nf6 d4 32. Rg2 Rb5 33. Qxf5 Kh8 34. Qf4 Kg7 35. Nh5+ Kh7 36. Nf6+ Kg7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "4"]
[White "In't Groen, Erik"]
[Black "Bakker, Kevin"]
[Result "1-0"]
[ECO "B40"]
[PlyCount "39"]
[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 e6 5. Nb3 Nf6 6. Bd3 d5 7. exd5 Nxd5 8. 0-0 Bd6 9. N1d2 Qc7 10. Nf3 b6 11. h3 Bb7 12. Nbd4 Nxd4 13. Nxd4 a6 14. Re1 0-0 15. c3 Rac8 16. Qg4 Nf4 17. Bxf4 Bxf4 18. Rad1 Qb8 19. g3 Bd6 20. Qh4 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "2"]
[White "In't Groen, Erik"]
[Black "Van Dommelen, Martin"]
[Result "0-1"]
[ECO "B28"]
[PlyCount "72"]
[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 a6 2. Nf3 b5 3. d4 Bb7 4. Bd3 e6 5. 0-0 c5 6. c3 Be7 7. Re1 Nf6 8. Bg5 d6 9. Nbd2 h6 10. Bh4 g5 11. Bg3 g4 12. Nh4 h5 13. Bxd6 Bxd6 14. e5 Nfd7 15. Ng6 fxg6 16. Bxg6+ Kf8 17. exd6 Qf6 18. Be4 Bd5 19. f3 g3 20. hxg3 cxd4 21. Bxd5 exd5 22. cxd4 Qxd6 23. Rc1 Nc6 24. Qc2 Ne7 25. Qc7 Rh6 26. Qxd6 Rxd6 27. Rc7 Rc8 28. Rec1 Rxc7 29. Rxc7 Nf5 30. Nb3 Nxg3 31. Kf2 Nf5 32. g4 hxg4 33. fxg4 Ng7 34. Nc5 Ke7 35. a4 Ne6 36. Nb7 Nxc7 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "3"]
[White "Koffeman, Timotheus"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "113"]
[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. f4 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. 0-0 a6 6. Be2 Nf6 7. Nc3 e6 8. d3 Be7 9. Kh1 0-0 10. Be3 b5 11. Qd2 Qb6 12. e5 dxe5 13. Nxe5 Nxe5 14. fxe5 Nd5 15. Bf2 Nxc3 16. Qxc3 Rac8 17. b4 Qc7 18. bxc5 Bxc5 19. Bf3 Be7 20. Qxc7 Rxc7 21. Bd1 Bc6 22. Bd4 Rd7 23. Bb2 Bd5 24. Bf3 Rc8 25. Rf2 Bh4 26. Re2 Bxf3 27. gxf3 Rdc7 28. c3 Rd7 29. Re4 Be7 30. Rd1 Rcd8 31. d4 Rc7 32. Re2 Rc4 33. Rd3 b4 34. cxb4 Rxb4 35. Ba3 Rb1+ 36. Kg2 Kf8 37. Rc2 Rdb8 38. Rc7 Bxa3 39. Rxa3 R8b2+ 40. Kg3 Ra1 41. Rxa6 Rbxa2 42. Rb6 Rg1+ 43. Kh3 g5 44. Rb8+ Kg7 45. Rbb7 g4+ 46. fxg4 Rf2 47. Re7 Kg6 48. Re8 Rf3+ 49. Kh4 Kh6 50. Rg8 Rf4 51. h3 Rg2 52. Rd7 Rg1 53. d5 exd5 54. Rd6+ f6 55. Rxf6+ Rxf6 56. exf6 Rf1 57. g5# 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2002.08.05"]
[Round "1"]
[White "Van Vliet, Gert Jan"]
[Black "In't Groen, Erik"]
[Result "0-1"]
[ECO "D05"]
[PlyCount "72"]
[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 d5 2. Nf3 c6 3. e3 Nf6 4. Bd3 e6 5. 0-0 Nbd7 6. Nbd2 Be7 7. c3 0-0 8. Qe2 a6 9. Re1 c5 10. e4 dxe4 11. Nxe4 cxd4 12. cxd4 b5 13. Ne5 Bb7 14. Ng5 Bd5 15. Qc2 g6 16. Nxg6 hxg6 17. Bxg6 Kg7 18. Nxf7 Rxf7 19. Bh6+ Kxh6 20. Bxf7 Nf8 21. Re5 Kg7 22. Bh5 Nxh5 23. Rxh5 Ng6 24. Qd2 Qg8 25. f4 Rf8 26. Rf1 Rf5 27. Rh3 Qf7 28. g3 Be4 29. Qe3 Bb7 30. Qd2 Qf6 31. Rd1 Bf3 32. g4 Bxg4 33. Rg3 Bxd1 34. Qxd1 Rxf4 35. d5 Bc5+ 36. Kg2 Rf2+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "1"]
[White "In't Groen, Erik"]
[Black "Bax, Frank"]
[Result "1/2-1/2"]
[ECO "C54"]
[PlyCount "57"]
[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. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Bg5 Bxg5 13. Nxg5 0-0 14. Nxh7 Kxh7 15. Qh5+ Kg8 16. Rh4 f5 17. Qh7+ Kf7 18. Rh6 Rg8 19. Re1 Kf8 20. Rh3 c6 21. Rhe3 Bd7 22. Rxe7 c5 23. Bb5 Qxe7 24. Rxe7 Kxe7 25. Bxd7 Kxd7 26. Qxf5+ Kc7 27. Qf7+ Kb6 28. a4 Rac8 29. Qd7 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "3"]
[White "In't Groen, Erik"]
[Black "Kamstra, Jippe"]
[Result "0-1"]
[ECO "B61"]
[PlyCount "30"]
[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. Bg5 Nc6 7. Qd2 Bd7 8. f4 b5 9. a3 e6 10. Be2 Be7 11. 0-0-0 Rc8 12. Bh4 Qc7 13. g4 Nxe4 14. Nxe4 Nxd4 15. Bxe7 Nb3+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "5"]
[White "In't Groen, Erik"]
[Black "Oude, Alink Mark"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "47"]
[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. Bc4 Nd4 4. Nxd4 exd4 5. 0-0 Bc5 6. Bxf7+ Kxf7 7. Qh5+ g6 8. Qxc5 Ne7 9. Qxd4 b6 10. d3 h6 11. Nc3 Bb7 12. b3 c5 13. Qe3 Qc7 14. Bb2 Rh7 15. f4 Rf8 16. Nb5 Qc6 17. Nxa7 Nf5 18. Nxc6 Nxe3 19. Ne5+ Ke6 20. Nxg6 Rd8 21. f5+ Kf7 22. Ne5+ Ke7 23. Rf2 d5 24. Re1 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "6"]
[White "In't Groen, Erik"]
[Black "Porte, Henrik"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "66"]
[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 Nf6 2. Nc3 d5 3. e5 d4 4. Nce2 d3 5. cxd3 Nd5 6. Ng3 Nc6 7. Nf3 Bg4 8. Be2 Bxf3 9. Bxf3 Nxe5 10. Be4 e6 11. 0-0 Be7 12. f4 Nc6 13. f5 e5 14. Nh5 Rg8 15. Qf3 Nd4 16. Qh3 h6 17. Bxd5 Qxd5 18. f6 Bxf6 19. Rxf6 Nc2 20. Rf5 Nxa1 21. Qe3 0-0-0 22. Rxe5 Qxd3 23. Qxa7 Qd4+ 24. Qxd4 Rxd4 25. b3 Nc2 26. Rc5 Nb4 27. Bb2 Rxd2 28. Bxg7 Re8 29. h3 Nd3 30. Ra5 Ree2 31. Nf6 Rxg2+ 32. Kh1 b6 33. Ra7 Rxg7 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "9"]
[White "In't Groen, Erik"]
[Black "Teteriatnikov, Konstantin"]
[Result "1/2-1/2"]
[ECO "B33"]
[PlyCount "103"]
[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 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. g3 0-0 12. h4 Be6 13. Bg2 Ne7 14. c3 Nxd5 15. exd5 Bd7 16. Nc2 g6 17. Qd2 Bg7 18. Nb4 f5 19. Nc6 Qe8 20. a4 bxa4 21. Rxa4 e4 22. 0-0 Bxc6 23. dxc6 Qxc6 24. Rfa1 Rfb8 25. Bf1 d5 26. Rxa6 Rxa6 27. Rxa6 Qc5 28. Qe2 Be5 29. h5 Kg7 30. hxg6 hxg6 31. Kg2 d4 32. cxd4 Bxd4 33. Ra2 Qd5 34. Qc4 Qxc4 35. Bxc4 Bxb2 36. g4 Kf6 37. gxf5 gxf5 38. f3 e3 39. Bd3 Be5 40. Ra6+ Kg5 41. Ra5 Re8 42. Rb5 f4 43. Be4 Re7 44. Ra5 Kh4 45. Ra2 Rd7 46. Rc2 Rd2+ 47. Rxd2 exd2 48. Bc2 Bd4 49. Bd1 Kg5 50. Kf1 Kf6 51. Ke2 Be3 52. Bc2 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "4"]
[White "Keizer, Theodoor"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "A38"]
[PlyCount "86"]
[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. a3 c5 2. Nf3 d6 3. g3 Nf6 4. Bg2 Nc6 5. 0-0 g6 6. c4 Bg7 7. Nc3 0-0 8. Rb1 a5 9. h3 Be6 10. d3 h6 11. e4 Kh7 12. Kh2 Rb8 13. Ne1 Bd7 14. f4 e5 15. Nf3 Ng8 16. Nd5 Be6 17. f5 Bxd5 18. cxd5 Nd4 19. Nxd4 exd4 20. b4 axb4 21. axb4 b6 22. Ra1 Ra8 23. Bd2 Be5 24. Qg4 Nf6 25. fxg6+ fxg6 26. Qe6 Nh5 27. Rf7+ Ng7 28. Raf1 Rxf7 29. Rxf7 cxb4 30. Bxb4 Qg5 31. Qg4 Qc1 32. Qd7 Ra1 33. Rf1 Qb2 34. Rxa1 Qxa1 35. Bxd6 Bxd6 36. Qxd6 Qc3 37. e5 Qxd3 38. Qxb6 Nf5 39. Qc7+ Kg8 40. e6 Qe2 41. d6 Nh4 42. Qf7+ Kh8 43. Qf1 Nxg2 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "7"]
[White "Sparenberg, Jeroen"]
[Black "In't Groen, Erik"]
[Result "0-1"]
[ECO "B21"]
[PlyCount "48"]
[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. d3 Nc6 3. f4 d6 4. g3 Nf6 5. Nf3 Qc7 6. Bg2 e6 7. 0-0 Be7 8. Be3 0-0 9. Bf2 a6 10. c3 b5 11. Nbd2 Ng4 12. Qe2 Nxf2 13. Qxf2 b4 14. cxb4 Nxb4 15. a3 Nxd3 16. Qe2 Nxb2 17. a4 Bd7 18. a5 Bb5 19. Qe1 Bxf1 20. Qxf1 Rfb8 21. Nc4 Nxc4 22. Qxc4 Rb4 23. Qd3 Qa7 24. Qd2 c4+ 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "2"]
[White "Van Zutphen, Jimmy"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B90"]
[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 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Qd2 Be7 9. f3 Qc7 10. 0-0-0 Nbd7 11. Qf2 b5 12. g4 h6 13. Kb1 Rb8 14. h4 b4 15. Nd5 Bxd5 16. exd5 a5 17. Qd2 a4 18. Nc1 Nc5 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "8"]
[White "Zoutman, Floris"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B86"]
[PlyCount "119"]
[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. Bc4 e6 7. Bb3 Nbd7 8. Be3 Nc5 9. f3 Nxb3 10. axb3 Be7 11. 0-0 Bd7 12. Kh1 0-0 13. f4 Qc7 14. Qe1 b5 15. Bd2 b4 16. Na4 a5 17. c3 d5 18. e5 Ne4 19. Be3 Bxa4 20. bxa4 bxc3 21. Nb5 Qc4 22. Nxc3 Nxc3 23. Qxc3 Qxc3 24. bxc3 Rfc8 25. Rfc1 Rab8 26. Rab1 Rxb1 27. Rxb1 Rxc3 28. Bd2 Rc4 29. Rb8+ Bf8 30. Ra8 Rd4 31. Be3 Rd1+ 32. Bg1 g6 33. Rxa5 Ra1 34. g3 Bb4 35. Ra8+ Kg7 36. Kg2 Bc3 37. Rc8 d4 38. Rc4 Ra2+ 39. Kf3 Rd2 40. Ke4 Re2+ 41. Kf3 Rd2 42. h4 h5 43. Bf2 Kf8 44. Bg1 Rd1 45. Bf2 Rd2 46. Bg1 Rd3+ 47. Ke4 Rxg3 48. Bxd4 Bxd4 49. Rxd4 Ra3 50. Rb4 Ke7 51. Kd4 Rf3 52. Kc5 Kd8 53. Kb6 Rd3 54. a5 Kc8 55. Ka7 Rd7+ 56. Ka8 Rd5 57. a6 Ra5 58. a7 Rd5 59. Rc4+ Kd7 60. Kb7 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "In't Groen, Erik"]
[Black "Heine, Ivar"]
[Result "0-1"]
[ECO "B02"]
[PlyCount "74"]
[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 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Bc4 Nb6 5. Bb3 e6 6. d4 Be7 7. Nf3 0-0 8. 0-0 Nc6 9. a3 Bf6 10. Be3 Ne7 11. Ne4 Nf5 12. Nxf6+ Qxf6 13. Bg5 Qg6 14. Qd2 h6 15. Bf4 Nd5 16. Bxd5 exd5 17. Bxc7 Be6 18. Bg3 Rac8 19. Rfe1 Nxg3 20. hxg3 Rxc2 21. Qb4 b6 22. Rab1 Rfc8 23. Re3 Rxf2 24. Kxf2 Qxb1 25. Rc3 Rc4 26. Rxc4 dxc4 27. Qc3 Bd5 28. Ne1 Qf5+ 29. Nf3 g5 30. Ke2 g4 31. Nh4 Qe4+ 32. Qe3 Kg7 33. Qxe4 Bxe4 34. Ke3 f5 35. Kf4 Kf6 36. d5 Bxd5 37. Nxf5 h5 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "In't Groen, Erik"]
[Black "Van den Berg, Hette Jan"]
[Result "1-0"]
[ECO "B18"]
[PlyCount "89"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Qc7 7. h4 h5 8. Bd3 Bxd3 9. Qxd3 Nd7 10. Bd2 e6 11. 0-0-0 Ngf6 12. c4 0-0-0 13. Be3 Bd6 14. Ne4 Nxe4 15. Qxe4 Nf6 16. Qd3 Rd7 17. Kb1 Rhd8 18. Qc2 Kb8 19. c5 Be7 20. Ne5 Rd5 21. Nxf7 Rc8 22. Ne5 Qa5 23. Bf4 Ka8 24. Rd3 Nd7 25. Ra3 Qb4 26. Nxd7 Rxd7 27. Be5 g5 28. hxg5 Bxg5 29. Qa4 Qxa4 30. Rxa4 h4 31. g3 Rh7 32. gxh4 Rxh4 33. Rxh4 Bxh4 34. Bg3 Rh8 35. Ra3 Be7 36. Rf3 Rh7 37. Bd6 b6 38. Bxe7 Rxe7 39. Rf6 Kb7 40. Kc2 Ka6 41. Kc3 Kb5 42. b4 e5 43. cxb6 axb6 44. Rf5 c5 45. Rxe5 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Sewambar, Ashwin"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B80"]
[PlyCount "89"]
[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 e6 7. f3 b5 8. Qd2 Qc7 9. g4 Nc6 10. 0-0-0 Bb7 11. Nxc6 Bxc6 12. Ne2 Rc8 13. Nd4 Bb7 14. Bd3 Be7 15. h4 d5 16. e5 Nd7 17. f4 Bc5 18. Rde1 Bxd4 19. Bxd4 Nc5 20. f5 Nxd3+ 21. Qxd3 Qc4 22. Qxc4 Rxc4 23. c3 Rf8 24. Rhf1 b4 25. Rf4 bxc3 26. bxc3 Ra4 27. Re2 Bc6 28. Ref2 exf5 29. gxf5 g6 30. fxg6 hxg6 31. e6 f5 32. Bc5 Rxf4 33. Rxf4 Rf6 34. e7 Re6 35. h5 gxh5 36. Rxf5 Rxe7 37. Bxe7 Kxe7 38. Rxh5 Kd6 39. Kb2 Bb5 40. Rh4 Kc5 41. Rd4 Be2 42. Rb4 Bb5 43. Kc2 Bc4 44. Rb8 Bxa2 45. Kb2 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Van Onzen, Jeroen"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B50"]
[PlyCount "73"]
[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. Be2 Nf6 4. d3 Nc6 5. c3 g6 6. 0-0 Bg7 7. Na3 a6 8. Nc2 0-0 9. a3 Qc7 10. Bg5 Rd8 11. Ne3 Be6 12. Bh4 d5 13. Bg3 Qb6 14. exd5 Bxd5 15. Nxd5 Rxd5 16. Nd2 Qxb2 17. Nc4 Qxc3 18. Rc1 Qd4 19. Nb6 Rdd8 20. Nxa8 Rxa8 21. Bf3 Rd8 22. Qb3 Na5 23. Qb6 Nc6 24. Qxb7 Ne5 25. Bxe5 Qxe5 26. Qxa6 Nd7 27. a4 Qf4 28. Qc4 Qxc4 29. Rxc4 Ne5 30. Rxc5 Nxf3+ 31. gxf3 Rxd3 32. Rc8+ Bf8 33. Ra1 Rd6 34. Ra8 f5 35. a5 Kf7 36. a6 Bg7 37. Ra2 1-0

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Aarts, Maikel"]
[Black "In't Groen, Erik"]
[Result "0-1"]
[ECO "B99"]
[PlyCount "46"]
[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 Nbd7 8. Qf3 Qc7 9. 0-0-0 Be7 10. Bd3 b5 11. a3 Bb7 12. Qe2 0-0 13. g4 Nc5 14. Kb1 Rab8 15. h4 Ba8 16. h5 b4 17. axb4 Rxb4 18. Bxa6 Nxa6 19. Na2 Rb6 20. h6 g6 21. f5 e5 22. Nb5 Qb8 23. Nac3 Rc8 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "In't Groen, Erik"]
[Black "Van Elteren, Jesse"]
[Result "1/2-1/2"]
[ECO "C56"]
[PlyCount "49"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 Nxe4 5. dxe5 d5 6. Bb5 Bc5 7. Nd4 Bd7 8. Bxc6 Bxc6 9. 0-0 0-0 10. f3 Ng5 11. f4 Ne4 12. Be3 Bd7 13. Nd2 Bb6 14. Qe2 Nxd2 15. Qxd2 c5 16. Nf3 d4 17. Bf2 Bb5 18. Rfd1 Ba5 19. c3 b6 20. Qc1 d3 21. c4 Ba6 22. a3 Qd7 23. b4 cxb4 24. axb4 Rac8 25. bxa5 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "Brinks, Jan Willem"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "B22"]
[PlyCount "30"]
[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. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Nf6 7. Nc3 Qd8 8. Bf4 Nd5 9. Bg3 Bg4 10. Be2 e6 11. Qd2 Bb4 12. 0-0 0-0 13. Rfd1 f6 14. Rac1 Rc8 15. Kh1 Qd7 1/2-1/2

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "In't Groen, Erik"]
[Black "Van Woerden, Michiel"]
[Result "0-1"]
[ECO "B75"]
[PlyCount "48"]
[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 g6 6. Be3 Bg7 7. f3 Nc6 8. Bc4 a6 9. Qd2 Qc7 10. Bb3 b5 11. h4 h5 12. 0-0-0 Na5 13. Kb1 Nc4 14. Bxc4 bxc4 15. Bg5 Rb8 16. Nd5 Nxd5 17. exd5 c3 18. Qe3 Rxb2+ 19. Ka1 0-0 20. Rb1 Qa5 21. Rxb2 cxb2+ 22. Kb1 Qxd5 23. Ne2 Be6 24. Qb3 Qa5 0-1

[Event "NED-ch U20 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "In't Groen, Erik"]
[Black "Visser, Henk Jan"]
[Result "0-1"]
[ECO "B78"]
[PlyCount "62"]
[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 g6 6. Be3 Bg7 7. Bc4 0-0 8. f3 Nc6 9. Qd2 Bd7 10. g4 Ne5 11. Bb3 Rc8 12. 0-0-0 Nc4 13. Bxc4 Rxc4 14. h4 b5 15. h5 b4 16. Nce2 Qa5 17. Kb1 Rfc8 18. Nb3 Qc7 19. Rc1 a5 20. hxg6 fxg6 21. Bh6 Bh8 22. Bg5 a4 23. Nbd4 Qc5 24. Bxf6 Bxf6 25. Qh6 Bxd4 26. Qxh7+ Kf8 27. Nf4 Bg7 28. Qxg6 Rxc2 29. Rh8+ Bxh8 30. Qh6+ Bg7 31. Ng6+ Kf7 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "In't Groen, Erik"]
[Black "Huebner, Werner"]
[Result "1-0"]
[ECO "C53"]
[PlyCount "79"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. 0-0 Bg4 8. Qb3 Qe7 9. d5 Nd4 10. Nxd4 Bxd4 11. Qxb7 Qd8 12. Nc3 Rb8 13. Qa6 Bc8 14. Qa4+ Bd7 15. Qd1 Qf6 16. Qd3 h6 17. Bd2 Ne7 18. Rab1 Ng6 19. b3 Bb6 20. Bb5 Qe7 21. Bxd7+ Qxd7 22. Na4 0-0 23. Nxb6 Rxb6 24. Rfc1 Ne5 25. Qd4 Ng6 26. Rc2 Nh4 27. Qe3 Re8 28. Rcc1 Ra6 29. a4 c5 30. dxc6 Rxc6 31. Rxc6 Qxc6 32. Rc1 Qb7 33. f3 f5 34. Qf4 g5 35. Qxd6 Qxb3 36. Qxh6 Nxf3+ 37. gxf3 Qxf3 38. Qxg5+ Kh8 39. Bc3+ Kh7 40. Qg7# 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Holland, Remco"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B50"]
[PlyCount "61"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. Bc4 a6 5. a3 b5 6. Ba2 Nc6 7. h3 g6 8. d3 Bg7 9. Bg5 0-0 10. 0-0 Qc7 11. Qd2 Re8 12. Bh6 Bh8 13. Ng5 e6 14. f4 Bg7 15. Bxg7 Kxg7 16. f5 Nd8 17. fxg6 hxg6 18. Qf4 Qe7 19. Rf2 Nh7 20. Nxh7 Kxh7 21. Raf1 Rf8 22. Qg3 Kg7 23. Rf6 Ra7 24. Ne2 e5 25. Qg5 Be6 26. Ng3 Rh8 27. Bxe6 Kg8 28. Bd5 Rh7 29. Qxg6+ Rg7 30. Qh6 Qxf6 31. Rxf6 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "In't Groen, Erik"]
[Black "Van den Berg, Hette Jan"]
[Result "0-1"]
[ECO "B18"]
[PlyCount "100"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Be6 6. Nf3 g6 7. Bf4 Bg7 8. c3 Nd7 9. Bd3 c5 10. 0-0 cxd4 11. cxd4 Bg4 12. Be2 Qb6 13. Qb3 Qxb3 14. axb3 Ngf6 15. Rfc1 Nd5 16. Be3 0-0 17. h3 Be6 18. Ne4 Nxe3 19. fxe3 Bd5 20. Bd3 e5 21. Ra5 Bxe4 22. Bxe4 b6 23. Bxa8 bxa5 24. Bd5 Nb6 25. Bb7 exd4 26. exd4 Rd8 27. Ra1 Bxd4+ 28. Nxd4 Rxd4 29. Rxa5 Rb4 30. Ra3 Na4 31. Bd5 Nb6 32. Bc4 Nxc4 33. bxc4 Rxc4 34. Rxa7 Rb4 35. Ra2 f5 36. Kf2 h5 37. Ke2 Kf7 38. Kd3 Rb3+ 39. Kc4 Rb7 40. b4 f4 41. b5 Ke7 42. Kc5 Kd7 43. b6 g5 44. Ra7 Kc8 45. Rxb7 Kxb7 46. Kd5 g4 47. Ke4 f3 48. Ke3 fxg2 49. Kf2 gxh3 50. Kg1 Kxb6 0-1

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "De Jong, Jasper"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "47"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e6 7. Be3 Be7 8. Qd2 Nbd7 9. Be2 Qc7 10. 0-0-0 0-0 11. g4 b5 12. a3 Rb8 13. g5 Ne8 14. Kb1 Nc5 15. h4 Qb7 16. Na2 Bd7 17. h5 g6 18. Nb3 Nxb3 19. cxb3 e5 20. Bd3 Be6 21. Qh2 Kg7 22. hxg6 Rh8 23. Qh6+ Kg8 24. gxh7+ 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Huistra, Pieter"]
[Black "In't Groen, Erik"]
[Result "1/2-1/2"]
[ECO "D51"]
[PlyCount "54"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. e3 Be7 6. Nf3 Nbd7 7. cxd5 cxd5 8. Bd3 b6 9. 0-0 h6 10. Bh4 0-0 11. Rc1 Bb7 12. Bb1 Rc8 13. Re1 Re8 14. Qd3 g6 15. Qe2 Nh5 16. Bxe7 Qxe7 17. Nb5 Ba6 18. Bd3 Nb8 19. Ne5 Ng7 20. g3 Nf5 21. Qf3 Bxb5 22. Bxb5 Rf8 23. Qe2 Nd6 24. a4 Kg7 25. b3 f6 26. Nf3 Ne4 27. Nh4 f5 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "In't Groen, Erik"]
[Black "Bax, Frank"]
[Result "1/2-1/2"]
[ECO "C54"]
[PlyCount "35"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. bxc3 d5 10. Re1 0-0 11. Bd3 Re8 12. Be3 Re6 13. Qc1 h6 14. Rd1 Rg6 15. Nd2 f5 16. Qc2 Qh4 17. Nf1 Be6 18. f3 1/2-1/2

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "In't Groen, Erik"]
[Black "De Bode, Christian"]
[Result "1-0"]
[ECO "C50"]
[PlyCount "141"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. Nc3 Nf6 5. 0-0 d6 6. d4 exd4 7. Nxd4 0-0 8. Bg5 h6 9. Bh4 Re8 10. Re1 Ne5 11. Bb3 a6 12. f4 Ng6 13. Bg3 b5 14. e5 dxe5 15. fxe5 Bc5 16. exf6 Rxe1+ 17. Qxe1 Bxd4+ 18. Kh1 Bxf6 19. Qe4 Bd7 20. Qxg6 Qf8 21. Bxc7 Rc8 22. Bf4 Bxc3 23. bxc3 Rxc3 24. Qd6 Qxd6 25. Bxd6 Rc6 26. Rd1 Bf5 27. Rd2 Kh7 28. Bg3 a5 29. a4 bxa4 30. Bxa4 Rc3 31. Bb3 a4 32. Bxf7 Bxc2 33. h3 Bb3 34. Bxb3 Rxb3 35. Kh2 a3 36. Ra2 Rd3 37. Bf4 Rd4 38. Bc1 Rc4 39. Bxa3 Ra4 40. Ra1 Kg6 41. Bb2 Rb4 42. Be5 Re4 43. Bg3 Re6 44. Ra5 Kf6 45. Rd5 Kg6 46. Rd6 Rxd6 47. Bxd6 Kf6 48. Kg3 Ke6 49. Ba3 g6 50. Kg4 Kf6 51. Bb2+ Kf7 52. Kf4 Kf8 53. g4 Kf7 54. h4 Kf8 55. g5 h5 56. Bf6 Ke8 57. Ke5 Kd7 58. Kd5 Ke8 59. Ke5 Kd7 60. Bh8 Ke7 61. Kd5 Kd7 62. Bg7 Ke7 63. Kc6 Kf7 64. Bf6 Ke6 65. Kc7 Kf7 66. Kd8 Kf8 67. Kd7 Kf7 68. Bd4 Kf8 69. Ke6 Kg8 70. Kf6 Kh7 71. Bc3 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Schoorl, Rob"]
[Black "In't Groen, Erik"]
[Result "1-0"]
[ECO "B82"]
[PlyCount "53"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Qf3 Be7 8. Be3 Nbd7 9. 0-0-0 Qc7 10. g4 h6 11. h4 b5 12. g5 hxg5 13. hxg5 Rxh1 14. Qxh1 Ng4 15. Bg1 b4 16. Nb1 e5 17. Nf5 exf4 18. Nxg7+ Kd8 19. g6 Nf8 20. e5 Bb7 21. Bg2 Rc8 22. c3 Bxg2 23. Qxg2 Nxe5 24. Ne8 f3 25. Nxc7 fxg2 26. g7 Rxc7 27. g8Q 1-0

[Event "NED U16 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "In't Groen, Erik"]
[Black "Hania, Renske"]
[Result "1/2-1/2"]
[ECO "B34"]
[PlyCount "61"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 0-0 8. 0-0 d5 9. exd5 Nxd5 10. Nxd5 Qxd5 11. Nxc6 Qxc6 12. c3 Bf5 13. Bf3 Qb5 14. Qb3 Qd7 15. Rad1 Qc7 16. Rd2 Be6 17. Qxb7 Qxb7 18. Bxb7 Rad8 19. Rfd1 Rxd2 20. Rxd2 Bxa2 21. Bxa7 Be6 22. g3 Bf6 23. Bb6 Kg7 24. Rd8 Bb3 25. Rxf8 Kxf8 26. Be3 Bg7 27. Kf1 e5 28. Ba6 Ke7 29. c4 e4 30. Bc1 Kd6 31. Ke2 1/2-1/2

