[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.13"]
[Round "9"]
[White "Van Wageningen, Lars"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "B18"]
[WhiteElo "1350"]
[BlackElo "1750"]
[PlyCount "87"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Be3 Nf6 7. c3 e6 8. Bd3 Bd6 9. Bxg6 hxg6 10. N1e2 Nbd7 11. Qc2 Qc7 12. 0-0-0 0-0 13. Ne4 Nxe4 14. Qxe4 Nf6 15. Qh4 b5 16. f3 a5 17. Bf4 Nd5 18. Bxd6 Qxd6 19. Qe4 b4 20. c4 Nf6 21. Qe5 Qd7 22. g4 Qb7 23. h4 Qa6 24. Rd2 Qxc4+ 25. Rc2 Qxa2 26. Kd2 Qb3 27. g5 Nh5 28. Qe4 Rac8 29. Rg1 c5 30. Nc1 Qd5 31. Qxd5 exd5 32. Rxc5 Rxc5 33. dxc5 Nf4 34. Nb3 a4 35. Nd4 a3 36. bxa3 bxa3 37. c6 Rc8 38. Nb5 Rxc6 39. Nxa3 Ne6 40. Nc2 Rc4 41. Rg4 d4 42. Re4 Ra4 43. Ne1 Ra2+ 44. Kd1 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.12"]
[Round "7"]
[White "Groen, Robbert"]
[Black "Hugaert, Arthur"]
[Result "0-1"]
[ECO "D82"]
[WhiteElo "1750"]
[BlackElo "1877"]
[PlyCount "81"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 c5 5. Nf3 Nc6 6. e3 cxd4 7. Nxd4 Bg7 8. cxd5 Nxd5 9. Nxc6 bxc6 10. Nxd5 cxd5 11. Bb5+ Bd7 12. Bxd7+ Qxd7 13. 0-0 Bxb2 14. Rb1 Bg7 15. Qb3 h5 16. h3 0-0 17. Rfd1 Rfd8 18. Rbc1 e6 19. Rc7 Qe8 20. Qb4 a5 21. Qc5 Qa4 22. Rb1 Qxa2 23. Rbb7 Rf8 24. Bd6 Qa1+ 25. Kh2 Be5+ 26. f4 Bxd6 27. Qxd6 Qf6 28. Ra7 Rfc8 29. Qa6 Rxa7 30. Rxa7 d4 31. Qxa5 dxe3 32. Kg3 e2 33. Kf2 Qxf4+ 34. Kxe2 Qe4+ 35. Kf2 Qd4+ 36. Kg3 h4+ 37. Kf3 Qd3+ 38. Kf2 Qg3+ 39. Ke2 Qxg2+ 40. Ke1 Qg3+ 41. Ke2 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.12"]
[Round "8"]
[White "Lambregts, Chris"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "1491"]
[BlackElo "1750"]
[PlyCount "79"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. b3 d5 2. Bb2 c5 3. e3 Nc6 4. Bb5 Bf5 5. d4 e6 6. dxc5 Nf6 7. b4 Be7 8. Ne2 0-0 9. Bxc6 bxc6 10. Nd4 Qc7 11. Nxf5 exf5 12. Nd2 f4 13. exf4 Qxf4 14. a3 Rfe8 15. 0-0 Nd7 16. Nf3 Rab8 17. Qd4 Qxd4 18. Bxd4 a5 19. c3 axb4 20. cxb4 f6 21. Rfe1 Kf7 22. Re3 Bf8 23. Rae1 Rxe3 24. Rxe3 g6 25. g3 Bh6 26. Re1 Ra8 27. Bb2 Re8 28. Rxe8 Kxe8 29. Nd4 Nb8 30. f4 Kf7 31. Kf2 f5 32. Nf3 Ke6 33. Ke3 Na6 34. Be5 Bf8 35. Ng5+ Kd7 36. Nxh7 Bxc5+ 37. bxc5 Nxc5 38. Nf8+ Kc8 39. Nxg6 Ne6 40. Ne7+ 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.11"]
[Round "6"]
[White "Terstall, Karel"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2178"]
[BlackElo "1750"]
[PlyCount "75"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bg5 e6 4. e3 Be7 5. c4 c6 6. Nc3 Nbd7 7. cxd5 exd5 8. Bd3 Nb6 9. h3 h6 10. Bf4 Be6 11. 0-0 Bd6 12. Ne5 Bc7 13. Bh2 Nfd7 14. f4 Nxe5 15. dxe5 d4 16. Ne4 dxe3 17. Qe2 Qd4 18. Rac1 0-0-0 19. Rfd1 Nd5 20. Bb1 Qb6 21. Kh1 Ne7 22. Bg1 Qb4 23. Bxe3 Bb6 24. Nd6+ Kb8 25. a3 Qb3 26. Rc3 Qa4 27. Bc2 Qa6 28. Bd3 Qa4 29. Bc2 Qa6 30. Qxa6 bxa6 31. Bg1 Bd5 32. b4 Bc7 33. Bc5 Nc8 34. Rxd5 Nxd6 35. Bxd6 Bxd6 36. Rxd6 Rxd6 37. exd6 Kb7 38. Be4 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.10"]
[Round "5"]
[White "Groen, Robbert"]
[Black "Zimmermann, Dries"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1750"]
[BlackElo "1602"]
[PlyCount "101"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Nbd7 5. Bf4 Bb4 6. a3 Bxc3+ 7. bxc3 0-0 8. e3 dxc4 9. Bxc4 Nb6 10. Qb3 Nxc4 11. Qxc4 c6 12. Bg5 Qd5 13. Qxd5 exd5 14. Bxf6 gxf6 15. Rb1 Bg4 16. Nd2 b6 17. 0-0 Be2 18. Rfe1 Bd3 19. Rbc1 Rfe8 20. c4 Rac8 21. cxd5 cxd5 22. Nf1 Ba6 23. Ng3 Rxc1 24. Rxc1 Rc8 25. Rxc8+ Bxc8 26. Nh5 Be6 27. Nxf6+ Kg7 28. Ne8+ Kf8 29. Nc7 Ke7 30. Kf1 Kd7 31. Nb5 a6 32. Nc3 Kc6 33. Ke2 b5 34. Kd2 a5 35. Na2 h5 36. Kc3 Kd6 37. Nc1 Kc6 38. Nb3 Kb6 39. h4 Bf5 40. Nc1 Kc6 41. Ne2 Kd6 42. Nf4 Bg6 43. f3 Kc6 44. g4 hxg4 45. fxg4 Be4 46. Nh5 Kd6 47. Nf6 Bb1 48. g5 Ke6 49. h5 Kf5 50. Nxd5 Be4 51. Nf6 1-0

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.10"]
[Round "4"]
[White "Oude Brunink, Elias"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "1601"]
[BlackElo "1750"]
[PlyCount "85"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. c4 e6 5. Nc3 Be7 6. Bd3 Bxd3 7. Qxd3 dxc4 8. Qxc4 Nd7 9. f4 Nb6 10. Qd3 Nh6 11. Nf3 Nf5 12. Be3 Nd5 13. Nxd5 Qxd5 14. 0-0 Rd8 15. g4 Nxe3 16. Qxe3 c5 17. a3 cxd4 18. Qd3 0-0 19. b4 f6 20. Rfe1 fxe5 21. Rxe5 Qd6 22. Qc4 Kh8 23. Qxe6 Qxe6 24. Rxe6 Rxf4 25. Rxe7 Rxf3 26. Rxb7 Rc3 27. Rd1 h6 28. Rxa7 d3 29. Kf1 Rc2 30. Re7 Rxh2 31. Kg1 Ra2 32. Re3 Rxa3 33. Kf2 Rb3 34. Re4 Rb8 35. Ke3 d2+ 36. Kf4 R3xb4 37. Rxd2 Rf8+ 38. Ke3 Rxe4+ 39. Kxe4 Kh7 40. Rd6 Rf6 41. Rxf6 gxf6 42. Kf5 Kg7 43. Ke4 1/2-1/2

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.09"]
[Round "3"]
[White "Groen, Robbert"]
[Black "Jansen, Bob"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1750"]
[BlackElo "2009"]
[PlyCount "110"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 e6 2. e4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 cxd4 7. cxd4 Nh6 8. Bd3 Nb4 9. Nc3 Nxd3+ 10. Qxd3 Nf5 11. 0-0 Bd7 12. b3 Rc8 13. Bb2 Bb4 14. Rfc1 0-0 15. g4 Ne7 16. h4 h6 17. Kg2 Ng6 18. Qe3 f5 19. g5 h5 20. Ne2 Qa5 21. Bc3 Bb5 22. Bxb4 Qxb4 23. Nf4 Nxf4+ 24. Qxf4 g6 25. Qd2 Qa3 26. Rc2 Bc6 27. Rac1 a5 28. Ne1 Kf7 29. Nd3 a4 30. bxa4 Qxa4 31. Nf4 Ra8 32. Rb2 Ra7 33. Rcc2 Rfa8 34. Rb4 Qa5 35. Rbb2 Qd8 36. Rb4 Qe7 37. Rbb2 Ra4 38. Rc3 Qd8 39. Rcb3 Qb8 40. Nxh5 Qa7 41. Nf4 Rxd4 42. Qe3 Re4 43. Qxa7 Rxa7 44. Kg3 b5 45. f3 Rc4 46. h5 gxh5 47. g6+ Kg7 48. Rh2 Raa4 49. Nxe6+ Kxg6 50. Rbb2 h4+ 51. Kf2 Kf7 52. Nd8+ Ke7 53. Nxc6+ Rxc6 54. Ke3 Rc3+ 55. Ke2 Ke6 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.09"]
[Round "2"]
[White "Verzijden, Michael"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1339"]
[BlackElo "1750"]
[PlyCount "21"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. Bf4 e6 6. e3 Nbd7 7. cxd5 exd5 8. Be2 Be7 9. 0-0 0-0 10. Qd2 Ne4 11. Bd3 0-1

[Event "Hengelo U20 op"]
[Site "Hengelo"]
[Date "2005.08.08"]
[Round "1"]
[White "Groen, Robbert"]
[Black "Veltman, Jelmer"]
[Result "0-1"]
[ECO "E30"]
[WhiteElo "1750"]
[BlackElo "2126"]
[PlyCount "88"]
[EventDate "2005.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 107 Extra"]
[Source "ChessBase"]
[SourceDate "2005.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2005.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bf4 0-0 6. Nf3 b6 7. a3 Bxc3+ 8. bxc3 d6 9. g3 Ba6 10. Qb3 Nc6 11. Bg2 Na5 12. Qc2 Nxc4 13. Nd2 d5 14. 0-0 Qe7 15. Rfe1 Nxd2 16. Qxd2 Rfd8 17. f3 c5 18. g4 cxd4 19. cxd4 Rac8 20. g5 hxg5 21. Bxg5 Rc4 22. Rec1 Rdc8 23. Rxc4 Rxc4 24. e4 dxe4 25. fxe4 Qc7 26. Bxf6 gxf6 27. e5 Rc2 28. Qe3 Qc3 29. Qxc3 Rxc3 30. exf6 Bb5 31. d5 exd5 32. Bxd5 Bc6 33. Bxc6 Rxc6 34. a4 Rxf6 35. a5 b5 36. a6 Rf5 37. Rc1 Rf6 38. Rb1 Rxa6 39. Rxb5 Ra1+ 40. Kg2 a5 41. Kf2 a4 42. Ra5 a3 43. Ke2 a2 44. Kf2 Rh1 0-1

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.14"]
[Round "9"]
[White "Groen, Robbert"]
[Black "Berendsen, David"]
[Result "1/2-1/2"]
[ECO "E90"]
[PlyCount "100"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. d4 g6 2. c4 Bg7 3. Nc3 Nf6 4. Nf3 d6 5. e4 c6 6. Bf4 Qb6 7. Qd2 Bg4 8. Be2 Nbd7 9. 0-0 0-0 10. Be3 Rfe8 11. h3 Bxf3 12. Bxf3 Rad8 13. Qc2 Qc7 14. Rac1 Nf8 15. b4 N6d7 16. Rfd1 b6 17. Qb3 Rb8 18. Qa4 Ne6 19. d5 Nd8 20. Qb3 c5 21. b5 Nb7 22. a4 Qc8 23. Bg4 h5 24. Bxd7 Qxd7 25. Nb1 Rf8 26. Qd3 Kh7 27. Rf1 Na5 28. Nd2 f5 29. f3 f4 30. Bf2 Rf7 31. Nb3 Nxb3 32. Qxb3 g5 33. Qd3 Kh8 34. Rfe1 g4 35. fxg4 hxg4 36. hxg4 Qxg4 37. Qh3+ Qxh3 38. gxh3 Rg8 39. Kh1 Be5 40. Rg1 Rh7 41. Rxg8+ Kxg8 42. Rg1+ Kf7 43. Kg2 f3+ 44. Kxf3 Rxh3+ 45. Bg3 Bxg3 46. Rxg3 Rh1 47. Kf4 Ra1 48. e5 Rxa4 49. e6+ Kf6 50. Rc3 Rb4 1/2-1/2

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.13"]
[Round "7"]
[White "Groen, Robbert"]
[Black "Biemans, Erik"]
[Result "1/2-1/2"]
[ECO "A54"]
[PlyCount "32"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. Nf3 e5 5. Bg5 Be7 6. e3 c6 7. Be2 Qc7 8. Rc1 0-0 9. 0-0 Re8 10. Bh4 Nf8 11. Qc2 Ng6 12. Bg3 Nh5 13. Bd3 Nxg3 14. hxg3 a5 15. d5 Bd7 16. e4 Rf8 1/2-1/2

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.13"]
[Round "8"]
[White "Tonoli, Benjamin"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "2073"]
[PlyCount "57"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d5 3. exd5 Nxd5 4. Bc4 Nxc3 5. bxc3 Nc6 6. Ba3 Bf5 7. Rb1 Ne5 8. Be2 Qd5 9. Nf3 0-0-0 10. Nxe5 Qxe5 11. 0-0 e6 12. Bxf8 Rhxf8 13. Re1 Qd6 14. Bf3 c6 15. d4 Qa3 16. Qd2 Rfe8 17. g4 Bg6 18. Rb4 e5 19. Reb1 Qa6 20. Be2 b5 21. a4 Qb7 22. axb5 c5 23. Rc4 exd4 24. Rxc5+ Kb8 25. Qf4+ Ka8 26. Bf3 Be4 27. Rc7 Qd5 28. Rxa7+ Kxa7 29. Qc7+ 1-0

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.13"]
[Round "7"]
[White "Van Splunter, Niels"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "B13"]
[PlyCount "101"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 Nf6 5. Bd3 Bg4 6. 0-0 g6 7. h3 Bxf3 8. Qxf3 Bg7 9. Bf4 0-0 10. c3 Nc6 11. Qe3 Qb6 12. Na3 a6 13. Rab1 Rfe8 14. Be2 e6 15. g4 e5 16. dxe5 Qxe3 17. Bxe3 Nxe5 18. Rfe1 h6 19. f4 Nc6 20. Nc2 Re7 21. Rbd1 Rae8 22. Bf3 Rd8 23. g5 hxg5 24. fxg5 Nh5 25. Rxd5 Rde8 26. Kf2 Be5 27. Bxh5 gxh5 28. h4 Kh7 29. Red1 Kg6 30. Rd7 f6 31. Bc5 Rxd7 32. Rxd7 fxg5 33. Rxb7 Re6 34. hxg5 Kxg5 35. Rb6 Nd8 36. Be3+ Kg6 37. Rxe6+ Nxe6 38. Nb4 h4 39. Nxa6 Kh5 40. Nb4 Bf4 41. Nd3 Bxe3+ 42. Kxe3 Kg4 43. a4 Kg3 44. a5 h3 45. a6 h2 46. Nf2 Nc7 47. a7 Kh4 48. b4 Kg5 49. b5 Na8 50. c4 Kf6 51. c5 1-0

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.11"]
[Round "4"]
[White "Groen, Robbert"]
[Black "Rietman, Frits"]
[Result "0-1"]
[ECO "E61"]
[BlackElo "2201"]
[PlyCount "97"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. Bf4 d6 6. e3 Na6 7. Bd3 c5 8. 0-0 Re8 9. Bg5 Be6 10. a3 Qd7 11. Rb1 cxd4 12. exd4 Rac8 13. b3 Nb8 14. Qd2 Bg4 15. Be2 Bf5 16. Bd3 Bg4 17. Be2 Nc6 18. d5 Bxf3 19. Bxf3 Nd8 20. Rfe1 a6 21. a4 b6 22. h3 Nb7 23. Ne4 b5 24. axb5 axb5 25. Rec1 Nxe4 26. Bxe4 Nc5 27. Bf3 bxc4 28. bxc4 Rb8 29. Qc2 Ra8 30. Rb5 Ra3 31. Qb1 Ra1 32. Qc2 Rea8 33. Rxa1 Rxa1+ 34. Rb1 Ra8 35. Be3 Qc7 36. Be2 h6 37. Bxc5 dxc5 38. g3 Bd4 39. Kg2 Kg7 40. Qb3 Qe5 41. Qf3 Ra6 42. Qd3 Rf6 43. f3 h5 44. h4 Ra6 45. Qe4 Qf6 46. Rb7 e6 47. Rd7 exd5 48. cxd5 Ra3 49. Qe7 0-1

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.11"]
[Round "5"]
[White "Krishnasing, Ashley"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C11"]
[PlyCount "128"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 Be7 6. Nf3 0-0 7. Bd3 c5 8. Ne2 Nc6 9. c3 Qb6 10. 0-0 cxd4 11. cxd4 Rd8 12. Kh1 Nf8 13. Ng3 f5 14. Bb1 Bd7 15. a3 Rac8 16. Rg1 Na5 17. b4 Rxc1 18. bxa5 Rxd1 19. axb6 Rxg1+ 20. Kxg1 axb6 21. Ne2 Ra8 22. Nc3 Rxa3 23. Rxa3 Bxa3 24. Bd3 Bc1 25. g3 Be8 26. Nb5 Bh5 27. Kf2 Bb2 28. Be2 h6 29. Ke3 Be8 30. Kd2 Bxb5 31. Bxb5 Kf7 32. h4 Ng6 33. Bd7 Ne7 34. Kc2 Ba3 35. Kb3 Bc1 36. Nh2 Nc6 37. Bc8 Nxd4+ 38. Kc3 Ne2+ 39. Kc2 Ba3 40. Nf1 Bc5 41. Kd3 Nc1+ 42. Kc2 Na2 43. Bxb7 Nb4+ 44. Kb3 Nd3 45. Ba6 Nf2 46. Be2 g6 47. Kc2 h5 48. Kb3 Ne4 49. Bd3 Bf2 50. Bxe4 dxe4 51. Kc2 Ke7 52. Kd1 e3 53. Ke2 Kd7 54. Nxe3 Bxe3 55. Kxe3 Kc6 56. Kd3 Kc5 57. Kc3 b5 58. Kb3 b4 59. Kb2 Kc4 60. Kc2 b3+ 61. Kb2 Kb4 62. Kb1 Kc3 63. Kc1 b2+ 64. Kb1 Kb3 0-1

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.10"]
[Round "2"]
[White "Gerssen, Jeanet"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "B12"]
[PlyCount "70"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Bd3 Bg6 5. Ne2 Qb6 6. Nbc3 e6 7. a3 Nd7 8. 0-0 Ne7 9. Rb1 Nf5 10. Be3 Be7 11. Na4 Qc7 12. b4 b5 13. Nc5 Nxc5 14. bxc5 0-0 15. Qd2 Nxe3 16. Qxe3 Qd7 17. Bxg6 fxg6 18. f4 Qd8 19. Rf3 a5 20. Rbf1 b4 21. a4 Rb8 22. Rh3 Rf5 23. g4 Rf7 24. Rff3 Qc7 25. Ng3 Rbf8 26. Qd3 Rxf4 27. Rxf4 Rxf4 28. Ne2 Rxg4+ 29. Rg3 Re4 30. Kh1 Bh4 31. Rg1 Qf7 32. Ng3 Bxg3 33. Rxg3 Qf2 34. Rg1 Re3 35. Qd1 Re2 0-1

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.10"]
[Round "3"]
[White "Groen, Robbert"]
[Black "Schenkeveld, Dick"]
[Result "1-0"]
[ECO "B92"]
[PlyCount "55"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 0-0 9. Be3 Be6 10. f3 Nbd7 11. Qd2 Nb6 12. Bf2 Rc8 13. Rfd1 d5 14. exd5 Nfxd5 15. Nxd5 Bxd5 16. Qa5 Rc6 17. Bxb6 Rxb6 18. Qxd5 Rd6 19. Qxb7 Bg5 20. Rxd6 Qxd6 21. Rd1 Be3+ 22. Kh1 Qh6 23. g3 Bf2 24. Kg2 Bb6 25. Qe4 f5 26. Qxe5 f4 27. Rd6 Rf6 28. Qe8+ 1-0

[Event "Stork Young Masters op"]
[Site "Hengelo"]
[Date "2004.08.09"]
[Round "1"]
[White "Groen, Robbert"]
[Black "Mazajchik, Tim"]
[Result "0-1"]
[ECO "B56"]
[PlyCount "72"]
[EventDate "2004.08.??"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 101 Extra"]
[Source "ChessBase"]
[SourceDate "2004.09.01"]
[SourceVersion "2"]
[SourceVersionDate "2004.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be3 Ng4 7. Qd2 Nxe3 8. Qxe3 g6 9. Bb5 Bd7 10. 0-0 Bg7 11. Nce2 0-0 12. Bxc6 bxc6 13. c3 Qb6 14. Qd2 Rab8 15. Rab1 d5 16. Nb3 Rfd8 17. exd5 cxd5 18. Ned4 a5 19. Qe3 a4 20. Nd2 e5 21. Nc2 Bf5 22. Rfc1 d4 23. cxd4 exd4 24. Qf3 Bh6 25. Nc4 Qb7 26. Qxb7 Rxb7 27. N2a3 Bxc1 28. Rxc1 d3 29. Rd1 d2 30. f3 Rb4 31. h3 Be6 32. Rxd2 Rxd2 33. Nxd2 Rxb2 34. Ndc4 Rxa2 35. Kh2 Bxc4 36. Nxc4 a3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.10"]
[Round "9"]
[White "Van Oers, Lowie"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "D03"]
[PlyCount "82"]
[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. Nc3 e6 3. Nf3 Nf6 4. Bg5 Be7 5. g3 Bd7 6. Bg2 c5 7. e3 Nc6 8. 0-0 cxd4 9. Nxd4 Qb6 10. Bf4 Nxd4 11. Qxd4 Qxd4 12. exd4 0-0 13. Ne2 Rac8 14. c3 Rc6 15. Rac1 Rfc8 16. b3 Ba3 17. Rb1 Bd6 18. c4 Ra6 19. Bxd6 Rxd6 20. c5 Ra6 21. Nc3 Rb8 22. b4 Ra3 23. Rb3 Rxb3 24. axb3 a6 25. Ra1 Ne8 26. Bf1 Nc7 27. Ra5 b6 28. Ra3 g6 29. Bxa6 bxc5 30. dxc5 Rxb4 31. Be2 d4 32. Na2 Rb7 33. Bf3 Nd5 34. Bxd5 exd5 35. Ra6 d3 36. c6 Bxc6 37. Rxc6 d2 38. Nc3 Rxb3 39. Nd1 Rb1 40. Kg2 Rxd1 41. Rc2 Rg1+ 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "8"]
[White "Groen, Robbert"]
[Black "De Jong, Amanda"]
[Result "1-0"]
[ECO "B84"]
[PlyCount "30"]
[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 Bd7 5. Nc3 a6 6. Be3 Nf6 7. Be2 Nc6 8. 0-0 e6 9. f3 Be7 10. Bf2 b5 11. a3 0-0 12. Qd2 h6 13. Rfb1 Qc8 14. Be3 Bd8 15. Nxc6 Bxc6 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.09"]
[Round "7"]
[White "Groen, Robbert"]
[Black "De Jong, Tiemen"]
[Result "0-1"]
[ECO "C28"]
[PlyCount "102"]
[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. f4 d6 3. Nf3 Nc6 4. Bc4 Be7 5. 0-0 Nf6 6. Nc3 Bg4 7. d3 Nd4 8. Be3 Nxf3+ 9. gxf3 Bh3 10. Rf2 Nh5 11. fxe5 dxe5 12. f4 Nxf4 13. Bxf4 exf4 14. Qh5 0-0 15. Qxh3 Bc5 16. Qg2 c6 17. Kh1 Bxf2 18. Qxf2 g5 19. Rg1 Kh8 20. Qg2 h6 21. Qh3 Kg7 22. Qf5 Qf6 23. Qxf6+ Kxf6 24. Kg2 g4 25. Kf2 h5 26. Ne2 Ke5 27. Re1 f5 28. exf5 Kxf5 29. Nd4+ Kg6 30. Re7 Rab8 31. Ne2 Kg5 32. Re5+ Kh4 33. d4 g3+ 34. hxg3+ fxg3+ 35. Kg1 Rf3 36. Nc3 Rbf8 37. Be2 R3f5 38. Re7 R8f7 39. Re4+ Kh3 40. Re3 Rf2 41. Ne4 Rg2+ 42. Kh1 Rxe2 43. Ng5+ Kg4 44. Rxe2 Kxg5 45. Kg2 h4 46. c4 Rf4 47. Rd2 Kg4 48. d5 h3+ 49. Kg1 h2+ 50. Kh1 Rf1+ 51. Kg2 Rg1# 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.08"]
[Round "6"]
[White "Walhout, Sander"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C01"]
[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 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Be7 6. Nf3 Bf5 7. Bd3 Bxd3 8. Qxd3 c6 9. 0-0-0 Nbd7 10. h3 b5 11. Rhe1 0-0 12. Re2 b4 13. Nb1 Ne4 14. Bxe7 Qxe7 15. Nbd2 Ndf6 16. Nxe4 Nxe4 17. Nd2 Qc7 18. Nxe4 dxe4 19. Rxe4 Rfd8 20. Rh4 g6 21. Qg3 Qa5 22. Qb3 Qg5+ 23. Qe3 Qxh4 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.07"]
[Round "4"]
[White "Reeve, Daryl"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "D30"]
[PlyCount "53"]
[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. c4 e6 3. Nf3 Nf6 4. Bg5 Be7 5. e3 Bd7 6. Nc3 Bc6 7. c5 Nbd7 8. b4 Ne4 9. Bxe7 Qxe7 10. Nb1 a6 11. a4 Ndf6 12. Ne5 Nd7 13. Nxd7 Bxd7 14. Bd3 0-0 15. Qc2 Nf6 16. Nc3 b6 17. 0-0 Rac8 18. Ne2 Be8 19. Rab1 Qd7 20. Kh1 h6 21. Ng1 Qe7 22. Nf3 Nd7 23. c6 Nb8 24. b5 a5 25. Rfe1 f5 26. Nd2 Kh7 27. g4 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "3"]
[White "Groen, Robbert"]
[Black "De Groote, Jesper"]
[Result "0-1"]
[ECO "B73"]
[PlyCount "50"]
[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 g6 6. Be3 Bg7 7. Be2 Nc6 8. 0-0 0-0 9. a3 Bd7 10. Rb1 a6 11. Qd2 Ng4 12. Nxc6 bxc6 13. Bd4 Nf6 14. b4 Qc7 15. f3 Be6 16. Rfd1 c5 17. bxc5 dxc5 18. Bxf6 Bxf6 19. Nd5 Bxd5 20. Qxd5 Bd4+ 21. Kh1 e6 22. Qc4 Qa5 23. Qb3 Bg7 24. Bc4 Rfb8 25. Qd3 Rd8 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.06"]
[Round "2"]
[White "Weijermars, Boudewijn"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "D30"]
[PlyCount "61"]
[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. Nf3 e6 2. c4 Nf6 3. d4 d5 4. Bf4 Be7 5. e3 0-0 6. Nbd2 b6 7. Qc2 Bb7 8. Bd3 h6 9. Rc1 c5 10. 0-0 Nbd7 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 Bxe4 14. Qxe4 Nf6 15. Qe3 cxd4 16. Qxd4 Bc5 17. Qc3 g5 18. Rfd1 Qe7 19. Be3 Rfd8 20. Ne5 Rxd1+ 21. Rxd1 Rd8 22. Rxd8+ Qxd8 23. h3 Qd1+ 24. Kh2 Bxe3 25. Qxe3 Qd6 26. g3 Qb4 27. b3 Qd6 28. Nf3 Nd7 29. Qd4 Qc6 30. Ne5 Nxe5 31. Qxe5 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2002.08.05"]
[Round "1"]
[White "Groen, Robbert"]
[Black "Van den Berg, Erik"]
[Result "1/2-1/2"]
[ECO "B02"]
[PlyCount "62"]
[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 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Nxd5 Qxd5 5. Nf3 Bg4 6. Be2 Nc6 7. 0-0 e5 8. d3 0-0-0 9. Be3 e4 10. dxe4 Qxe4 11. Qc1 Ne5 12. Nxe5 Bxe2 13. Re1 Qxe5 14. Rxe2 Qh5 15. Re1 Bd6 16. Bf4 Bxf4 17. Qxf4 Rd6 18. Qe3 b6 19. Qe4 c6 20. Qa4 a5 21. Qb3 c5 22. Qb5 Rhd8 23. Qa6+ Kb8 24. h3 Qd5 25. Re7 Qc6 26. Qa7+ Kc8 27. Rxf7 Rg6 28. g3 Rgd6 29. Re1 Rd2 30. Qa6+ Kb8 31. Qa7+ Kc8 1/2-1/2

[Event "NED op U14"]
[Site "Netherlands"]
[Date "2001.??.??"]
[Round "2"]
[White "Ferrol, Jankiel"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "C11"]
[PlyCount "83"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Qg4 c5 6. Be3 Qb6 7. Rb1 Nc6 8. Nf3 cxd4 9. Bxd4 Nxd4 10. Qxd4 Qxd4 11. Nxd4 Nxe5 12. Bb5+ Bd7 13. Bxd7+ Nxd7 14. Ncb5 Kd8 15. 0-0 a6 16. Nc3 Bc5 17. Nce2 Ke7 18. c3 Rhd8 19. Nb3 Bb6 20. Nbd4 Nc5 21. Nf3 Ne4 22. Ng3 Nc5 23. Rbd1 Rac8 24. Ne2 Ba7 25. Ned4 h6 26. g3 Ne4 27. Kg2 Nd6 28. Rfe1 Kf8 29. Re2 Nc4 30. Nh4 Re8 31. Nhf3 Na5 32. h3 Nc6 33. Nxc6 bxc6 34. Ne5 Red8 35. Rc2 Bb8 36. Nf3 c5 37. Rdc1 c4 38. Rd1 Bd6 39. b3 Rc7 40. b4 Ra8 41. a3 a5 42. Nd4 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "1"]
[White "Groen, Robbert"]
[Black "Bensdorp, Laura"]
[Result "0-1"]
[ECO "B89"]
[PlyCount "170"]
[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 Nc6 6. Bc4 e6 7. f3 a6 8. Be3 Be7 9. Qd2 Qc7 10. Bb3 Bd7 11. Na4 Ne5 12. Ne2 Nc4 13. Bxc4 Bxa4 14. Bb3 Bxb3 15. cxb3 d5 16. Rc1 Qd8 17. exd5 Nxd5 18. a3 Nxe3 19. Qxe3 Bh4+ 20. g3 Bf6 21. Rd1 Qa5+ 22. Nc3 0-0 23. 0-0 Rac8 24. b4 Qc7 25. Rc1 Qc4 26. Kg2 Qb3 27. Rf2 Rfd8 28. Rd2 h6 29. Rxd8+ Rxd8 30. Qe2 Bg5 31. Rd1 Rxd1 32. Nxd1 Qd5 33. Nc3 Qd4 34. Qe4 Qd7 35. Qc2 f5 36. Qd1 Qc6 37. Qd3 Bf6 38. h3 Kf7 39. Qe3 Qd6 40. Qe2 Be5 41. f4 Bf6 42. Qf3 Qd2+ 43. Kh1 Qxb2 44. Qxb7+ Kg6 45. Nd1 Qxa3 46. Kg2 Qa2+ 47. Kf1 Qb1 48. Ke2 Qc2+ 49. Ke1 Bc3+ 50. Nxc3 Qxc3+ 51. Kf2 Qd2+ 52. Kg1 Qe1+ 53. Kh2 Qf2+ 54. Qg2 Qxg2+ 55. Kxg2 Kf6 56. Kf3 Ke7 57. Ke3 Kd7 58. Kd3 h5 59. h4 Kd6 60. Kd4 Kc6 61. Kc4 Kb6 62. Kc3 Kb5 63. Kb3 a5 64. bxa5 Kxa5 65. Kc3 Kb5 66. Kd4 Kc6 67. Kc4 Kd6 68. Kd4 g6 69. Kd3 Kd5 70. Ke3 Kc4 71. Ke2 Kd4 72. Kf2 Ke4 73. Ke2 Kd4 74. Kf2 e5 75. fxe5 Kxe5 76. Ke3 Ke6 77. Kf3 Kf6 78. Kf4 g5+ 79. Kf3 gxh4 80. gxh4 Ke5 81. Ke3 f4+ 82. Kf2 Ke4 83. Ke2 f3+ 84. Kf2 Kf4 85. Kf1 Kg3 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "5"]
[White "Groen, Robbert"]
[Black "Boersma, Rob"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "39"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Bc4 d6 5. 0-0 Bg4 6. d4 Nf6 7. Nc3 Be7 8. Bxf4 0-0 9. a3 Re8 10. Qd3 Nd7 11. Rae1 Bxf3 12. Rxf3 Bf6 13. Be3 Ne7 14. Nd5 Nxd5 15. Bxd5 c6 16. Ba2 Qb6 17. b4 a5 18. e5 Be7 19. Bxf7+ Kh8 20. Qxh7+ 1-0

[Event "NED op U14"]
[Site "Netherlands"]
[Date "2001.??.??"]
[Round "3"]
[White "Groen, Robbert"]
[Black "Dessing, Bastiaan"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "154"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 d6 2. Nc3 g6 3. Bc4 Bg7 4. Nf3 Bg4 5. d3 Nc6 6. Be3 Ne5 7. Bb3 Nxf3+ 8. gxf3 Bd7 9. Qd2 Nf6 10. 0-0-0 a5 11. a3 b5 12. Nd5 Nxd5 13. Bxd5 c6 14. Ba2 b4 15. a4 c5 16. b3 Bc6 17. d4 c4 18. d5 c3 19. Qd3 Bd7 20. Bd4 Bxd4 21. Qxd4 0-0 22. f4 Bg4 23. Rde1 Ra6 24. Rhg1 Bh5 25. Rg5 Qb6 26. Qxb6 Rxb6 27. Reg1 Bf3 28. Re1 Kg7 29. Re3 Bh5 30. e5 f6 31. exf6+ exf6 32. Rg1 f5 33. Rge1 Rb7 34. Re6 Rd7 35. R1e3 Rc8 36. f3 Rc5 37. Rd3 Kf7 38. Kd1 h6 39. Ke1 Re7 40. Rxe7+ Kxe7 41. Kf2 g5 42. fxg5 hxg5 43. Kg3 f4+ 44. Kg2 Bf7 45. Rd1 Rxd5 46. Rxd5 Bxd5 47. Bb1 Be6 48. Kf2 d5 49. Ke2 Bf5 50. Kf2 d4 51. Ke2 Kf6 52. Kf2 Kg6 53. Kg2 Kh5 54. Kf2 Kh4 55. Kg2 Be6 56. Kf1 Kh3 57. Kg1 Bd5 58. Kf2 Kxh2 59. Ke2 Kg3 60. Kd3 Kxf3 61. Kxd4 Bg8 62. Kc5 g4 63. Kb5 g3 64. Kxa5 g2 65. Kxb4 g1Q 66. Ba2 Qa1 67. Bb1 Qxb1 68. Kxc3 Bh7 69. Kb4 Bxc2 70. a5 Qxb3+ 71. Kc5 Ke3 72. a6 f3 73. a7 Qb7 74. Kc4 f2 75. Kc3 f1Q 76. Kxc2 Qc4+ 77. Kd1 Qb1# 0-1

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "9"]
[White "Groen, Robbert"]
[Black "Houterman, Geert"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "101"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Nc6 6. Bd3 Bd7 7. Bc2 cxd4 8. cxd4 Nb4 9. Nc3 Nxc2+ 10. Qxc2 Ne7 11. 0-0 Nc6 12. Be3 Be7 13. a3 Na5 14. Nd2 Rc8 15. Rab1 Bb5 16. Rfc1 Qa6 17. Qd1 Bd3 18. Ra1 0-0 19. Nb3 Nxb3 20. Qxb3 Rc6 21. Nd1 Bc4 22. Qc3 Rfc8 23. Qd2 Qb5 24. Rc3 Bb3 25. Rxc6 bxc6 26. Nc3 Qb7 27. Rc1 Rb8 28. Bg5 Bf8 29. Be3 Qb6 30. Nb1 Bc4 31. b4 a5 32. h3 axb4 33. axb4 Bxb4 34. Qb2 Qc7 35. Qc2 Ra8 36. Nc3 c5 37. Rb1 Ra3 38. Nb5 Bxb5 39. Rxb4 Bc4 40. Rb2 cxd4 41. Bxd4 g6 42. f4 Qa5 43. Qf2 Ra1+ 44. Kh2 Qe1 45. Bc5 Kg7 46. Rb8 Qh1+ 47. Kg3 h5 48. Be7 h4+ 49. Kxh4 f5 50. exf6+ Kh7 51. f7 1-0

[Event "NED op U14"]
[Site "Netherlands"]
[Date "2001.??.??"]
[Round "5"]
[White "Groen, Robbert"]
[Black "Van der Meiden, Geurt Jan"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "117"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Bd7 7. Bc2 cxd4 8. cxd4 Bb4+ 9. Nc3 Nge7 10. 0-0 0-0 11. Na4 Qc7 12. a3 Ba5 13. b4 Bb6 14. Nc5 Bxc5 15. bxc5 Na5 16. Be3 Nc4 17. Nd2 Bb5 18. Nxc4 Bxc4 19. Re1 Rab8 20. Qd2 Ng6 21. Reb1 Rfc8 22. Rb2 b6 23. cxb6 Rxb6 24. Rab1 Rcb8 25. Rb4 Rxb4 26. Rxb4 Rxb4 27. Qxb4 Qb6 28. Qxb6 axb6 29. Bxg6 hxg6 30. f4 b5 31. Kf2 f6 32. g4 Kf7 33. g5 f5 34. Ke1 Ke7 35. Bd2 Kf7 36. Bb4 Ke8 37. Kd2 Kf7 38. Kc3 Ke8 39. Bc5 Kf7 40. Kb4 Ke8 41. Bd6 Kf7 42. Bc7 Ke8 43. Kc5 Ke7 44. Ba5 Bd3 45. Kb6 Ke8 46. Kc6 Ke7 47. Bb4+ Kf7 48. Kd7 Bc4 49. h4 Bd3 50. Bf8 Kxf8 51. Kxe6 Ke8 52. Kxd5 Bc4+ 53. Kc6 Ke7 54. d5 Kd8 55. d6 Kc8 56. d7+ Kd8 57. Kd6 Bf7 58. e6 Be8 59. e7# 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "3"]
[White "Groen, Robbert"]
[Black "Voortman, Jasper"]
[Result "1/2-1/2"]
[ECO "C30"]
[PlyCount "13"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 Nc6 3. Nf3 Nf6 4. Nc3 d6 5. Bc4 Bg4 6. 0-0 Nxe4 7. d4 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "7"]
[White "Groen, Robbert"]
[Black "Zomer, Anoek"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "131"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 d6 3. Nf3 Bg4 4. Bc4 Bxf3 5. Qxf3 Nf6 6. 0-0 Nbd7 7. Nc3 Be7 8. d3 c6 9. Be3 Nb6 10. Bb3 Qc7 11. fxe5 dxe5 12. Qg3 Rg8 13. Kh1 h6 14. Bxb6 axb6 15. d4 Ra5 16. Rf5 g6 17. Rf3 Rf8 18. Raf1 Nh5 19. Qf2 f6 20. dxe5 Rxe5 21. Qe3 g5 22. Rf5 Nf4 23. Ne2 Rxf5 24. exf5 Nxe2 25. Qxe2 Qe5 26. Qxe5 fxe5 27. Be6 Bf6 28. b3 Rh8 29. Rd1 Rh7 30. g3 Rc7 31. Kg2 Ke7 32. Kf3 h5 33. h3 Bg7 34. g4 h4 35. Ke4 Bf6 36. c4 Bg7 37. b4 Bf6 38. a4 Bg7 39. b5 c5 40. Ra1 Kf6 41. a5 bxa5 42. Rxa5 Ke7 43. Ra8 Bf6 44. Rb8 Kd6 45. Bd5 Rd7 46. Rxb7 Rxb7 47. Bxb7 Bd8 48. Bc6 Bc7 49. Bd5 Bd8 50. Kd3 Kd7 51. Be4 Kd6 52. Kc3 Kd7 53. Kb3 Kd6 54. Kc3 Kd7 55. Kd3 Kd6 56. Bd5 Kd7 57. Ke4 Kd6 58. b6 Bxb6 59. f6 Bd8 60. Kf5 Kd7 61. Kxg5 e4 62. Bxe4 Ke6 63. Bd5+ Ke5 64. Kxh4 Bxf6+ 65. g5 Bg7 66. Kg4 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "4"]
[White "Luteijn, Michiel"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "74"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Ne7 6. 0-0 0-0 7. Nc3 c6 8. Bg5 f6 9. Be3 Bf5 10. Nh4 Qd7 11. Nxf5 Nxf5 12. Bxf5 Qxf5 13. Qd2 Nd7 14. Rfe1 Rfe8 15. Ne2 Re7 16. Bf4 Bxf4 17. Nxf4 Rae8 18. Rxe7 Rxe7 19. f3 Kf7 20. Kf2 Nb6 21. b3 Na8 22. Nd3 b6 23. g4 Qd7 24. Qc3 Qd6 25. Rh1 Nc7 26. a4 Ne6 27. h4 Nf4 28. Nxf4 Qxf4 29. Qxc6 Qxd4+ 30. Kg3 Qe5+ 31. Kh3 g5 32. Rd1 Kg6 33. Rxd5 Qe2 34. Rxg5+ Kf7 35. Qd5+ Re6 36. Rh5 Qf1+ 37. Kg3 Qe1+ 1/2-1/2

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "2"]
[White "Schwietering, Ralf"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "C01"]
[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 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bd6 5. Nc3 c6 6. h3 Ne7 7. Bd3 0-0 8. a3 Bf5 9. Be3 Nd7 10. g4 Bg6 11. Qd2 b5 12. Bxb5 cxb5 13. Nxb5 Nf6 14. 0-0-0 Rb8 15. Nxd6 Qxd6 16. Bf4 Qb6 17. Bxb8 Rxb8 18. Qb4 Qxb4 19. axb4 Be4 20. Rde1 Bxf3 21. Rhg1 Ne4 22. Re3 Rxb4 23. Rxf3 g6 24. c3 Ra4 25. Kc2 Ra6 26. Re3 Re6 27. Rf1 Ng5 28. h4 Rxe3 29. fxe3 Ne4 30. Ra1 Nc8 31. Ra5 Kf8 32. Rxd5 Nb6 33. Rd8+ Kg7 34. g5 f6 35. gxf6+ Nxf6 36. Rb8 Nfd7 37. Rb7 Kf6 38. c4 Nf8 39. Kd3 h6 40. Rxa7 Nbd7 41. e4 g5 42. Ra6+ Kg7 43. hxg5 hxg5 44. e5 Kf7 45. b4 g4 46. Ke4 Nb8 47. Rf6+ Kg7 48. Rf4 Nc6 49. Rxg4+ Kf7 50. b5 Nd8 51. d5 Ke7 52. c5 1-0

[Event "Hengelo U16 op"]
[Site "Hengelo"]
[Date "2001.??.??"]
[Round "8"]
[White "Van den Boom, Inge"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "C01"]
[PlyCount "39"]
[EventDate "2001.08.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. c3 Ne7 6. Nf3 Bf5 7. 0-0 0-0 8. Bg5 f6 9. Bh4 Bxd3 10. Qxd3 Ng6 11. Bg3 Re8 12. Re1 Rxe1+ 13. Nxe1 c6 14. Qf5 Bxg3 15. fxg3 Qd7 16. Qf3 Qe6 17. Nd3 Nd7 18. Nd2 Re8 19. Nf4 Nxf4 20. gxf4 1/2-1/2

[Event "NED op U14"]
[Site "Netherlands"]
[Date "2001.??.??"]
[Round "4"]
[White "Van der Zon, Stef"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "38"]
[EventDate "2001.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be3 Qb6 7. Qc2 Rc8 8. Nbd2 cxd4 9. Nxd4 Nxd4 10. Bxd4 Qxd4 11. cxd4 Rxc2 12. b3 Bb5 13. Rd1 Ne7 14. Be2 Rxa2 15. h4 Nf5 16. Rh3 Nxd4 17. Bd3 Nxb3 18. Bc2 Nxd2 19. Rxd2 Rxc2 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.12"]
[Round "9"]
[White "Groen, Robbert"]
[Black "Euser, Kasper"]
[Result "0-1"]
[ECO "C30"]
[PlyCount "66"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 Nc6 4. Bc4 d6 5. Nc3 Bg4 6. d3 Nd4 7. Bd2 Bxf3 8. gxf3 Qh4+ 9. Kf1 Nxc2 10. Qe2 Nxa1 11. Be3 Qh3+ 12. Kg1 Bxe3+ 13. Qxe3 Nc2 14. Qf2 Nd4 15. Qg2 Nxf3+ 16. Kf2 Qxg2+ 17. Kxg2 Nd4 18. Rf1 exf4 19. Rxf4 Nf6 20. Nd5 Nxd5 21. Bxd5 0-0 22. h4 c6 23. Bc4 b5 24. Bb3 Nxb3 25. axb3 a5 26. h5 a4 27. bxa4 Rxa4 28. Rg4 Rb4 29. h6 g6 30. Kf3 Rxb2 31. Rh4 Ra8 32. e5 dxe5 33. Re4 f6 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "7"]
[White "Groen, Robbert"]
[Black "Potter van Loon, Rogier"]
[Result "0-1"]
[ECO "C30"]
[PlyCount "102"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. d4 exd4 5. Nxd4 Nf6 6. Nc3 0-0 7. Bc4 Bg4 8. Nf3 Nc6 9. Qd3 Re8 10. Be3 Nb4 11. Qd2 Bxe3 12. Qe2 Bb6 13. 0-0-0 Nc6 14. h3 Nd4 15. Qf1 Nxf3 16. gxf3 Be6 17. Bxe6 fxe6 18. e5 Nh5 19. exd6 cxd6 20. Qc4 Be3+ 21. Kb1 Bxf4 22. Rhg1 Be5 23. Ne2 Qb6 24. c3 Rac8 25. Qe4 Nf6 26. Qh4 Nd5 27. Qg5 Bf6 28. Qg3 Rc7 29. Rc1 Rd7 30. h4 Ne3 31. h5 Nf5 32. Qh3 Qf2 33. Nd4 Nxd4 34. cxd4 Qxd4 35. Rg2 Qh4 36. Qxh4 Bxh4 37. f4 Rf7 38. Rf1 Ref8 39. Rg4 Bf6 40. b3 Be5 41. h6 g6 42. Rc1 Bxf4 43. Re1 Rf6 44. Rh1 Be5 45. Rgg1 Rf2 46. Re1 Rb2+ 47. Ka1 Re2+ 48. Kb1 Rxe1+ 49. Rxe1 Rf2 50. Rc1 Rb2+ 51. Ka1 Rxb3+ 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.11"]
[Round "8"]
[White "Lettinga, Niels"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "C14"]
[PlyCount "103"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. Nf3 a6 8. Be2 c5 9. Na4 Nc6 10. dxc5 Nxc5 11. Nxc5 Qxc5 12. c3 Qb6 13. Qc1 0-0 14. 0-0 Bd7 15. Bd3 Ne7 16. Qd2 Bb5 17. Bxb5 Qxb5 18. Rfe1 Rac8 19. Re3 Ng6 20. Nd4 Qb6 21. Qc2 Qc7 22. Rae1 b5 23. Qb3 Qc4 24. Qxc4 bxc4 25. g3 Rb8 26. R3e2 Rfc8 27. f4 Ne7 28. Rb1 Nc6 29. Nxc6 Rxc6 30. Kf1 a5 31. Ke1 a4 32. Kd1 Rcb6 33. Kc1 Kf8 34. Kc2 Ke7 35. g4 f6 36. exf6+ gxf6 37. f5 Kf7 38. fxe6+ Rxe6 39. Rxe6 Kxe6 40. Re1+ Kf7 41. h3 Rb6 42. Re3 Re6 43. Kd2 Re5 44. Ke2 Kg6 45. h4 Rxe3+ 46. Kxe3 h5 47. Kf4 Kh6 48. Kf5 hxg4 49. Kxg4 Kg6 50. a3 f5+ 51. Kf4 Kh5 52. Kxf5 1-0

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.10"]
[Round "6"]
[White "Huistra, Hieke"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C11"]
[PlyCount "72"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. Be3 cxd4 7. Bxd4 Nc6 8. Bb5 Be7 9. 0-0 0-0 10. Re1 a6 11. Bf1 b6 12. Ne2 Nc5 13. Ng3 a5 14. a3 Ba6 15. Bxa6 Nxa6 16. c3 Nc5 17. Qc2 a4 18. Rad1 Nb3 19. Rd3 Ncxd4 20. Nxd4 Nxd4 21. Rxd4 b5 22. Red1 Rc8 23. Qe2 Rc4 24. Qc2 Qb6 25. b3 Rxd4 26. Rxd4 Rc8 27. Qb2 axb3 28. Qxb3 Rc4 29. Rxc4 dxc4 30. Qb2 Qc5 31. h3 h6 32. Qb4 Bf8 33. Kf1 Qxe5 34. Qb2 Qd5 35. f3 Qd1+ 36. Kf2 Bc5# 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "4"]
[White "Brandenburg, Rik"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C01"]
[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 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bg5 Be7 6. Bd3 Bg4 7. h3 Bh5 8. Nbd2 Nbd7 9. c3 c6 10. Qc2 Bg6 11. 0-0 Bxd3 12. Qxd3 0-0 13. Rae1 Re8 14. Re3 h6 15. Bh4 Bd6 16. Rfe1 Rxe3 17. Rxe3 Qf8 18. Ne5 Re8 19. f4 Bc7 20. Rg3 Nxe5 21. fxe5 Nh7 22. Kf1 Bd8 23. Bxd8 Rxd8 24. Nf3 Re8 25. Qf5 Re6 26. Ke2 Qe7 27. Qg4 f6 28. Kd3 fxe5 29. Nxe5 Ng5 30. h4 Ne4 31. Rf3 Rf6 32. h5 Nf2+ 33. Rxf2 Rxf2 34. b3 Qg5 35. Qc8+ Kh7 36. Nf3 Qxh5 37. c4 Rxg2 38. Qf8 Qg4 39. a3 Qe4+ 40. Kc3 Rg3 41. Qb8 Qxf3+ 42. Kb4 Qxb3+ 43. Kc5 Qxc4+ 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.09"]
[Round "5"]
[White "Groen, Robbert"]
[Black "Broekmeulen, Jasper"]
[Result "0-1"]
[ECO "B90"]
[PlyCount "57"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Bd3 Nc6 7. Be3 e5 8. Nf3 Be6 9. Bg5 Qb6 10. Bxf6 gxf6 11. b3 Rg8 12. g3 Bh6 13. Na4 Qa5+ 14. Nd2 b5 15. Nb2 Nd4 16. Be2 Qc3 17. Rc1 Qxb2 18. c3 Rc8 19. c4 Qxa2 20. cxb5 Rxc1 21. Qxc1 Bxd2+ 22. Qxd2 Qb1+ 23. Qd1 Qxe4 24. Rg1 Nf3+ 25. Kf1 Bh3+ 26. Rg2 Nxh2+ 27. Ke1 Bxg2 28. Qxd6 Nf3+ 29. Kd1 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "2"]
[White "De Wit, Tex"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "100"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 d5 3. f4 Ne7 4. Nf3 Nbc6 5. g3 Ng6 6. Bg2 Bc5 7. e5 Nd4 8. Nxd4 Bxd4 9. Ne2 Bb6 10. d4 c5 11. c3 Bd7 12. h4 Ne7 13. g4 Bb5 14. Be3 cxd4 15. Nxd4 Ba6 16. Bh3 Nc6 17. g5 Nxd4 18. Bxd4 Bxd4 19. Qxd4 h6 20. 0-0-0 Qb6 21. Qd2 0-0-0 22. f5 Kb8 23. Qf4 hxg5 24. hxg5 Ka8 25. f6 g6 26. Bg2 Rc8 27. Rh6 Rxh6 28. gxh6 Rh8 29. Rh1 Rh7 30. Qd2 Bb5 31. Bf3 Qa6 32. a3 Bc4 33. Bd1 Qb5 34. Rh4 Qb6 35. Rd4 a6 36. b3 Bb5 37. a4 Bc6 38. Bc2 Qc7 39. Bd3 Qxe5 40. Bxg6 fxg6 41. Rf4 Be8 42. f7 Bxf7 43. Qf2 Qxc3+ 44. Kb1 Qxb3+ 45. Ka1 Rxh6 46. Rh4 Rxh4 47. Qxh4 Qc3+ 48. Kb1 Qc5 49. a5 d4 50. Qe4 Qf5 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.08"]
[Round "3"]
[White "Groen, Robbert"]
[Black "Van Eijk, Sander"]
[Result "0-1"]
[ECO "C30"]
[PlyCount "76"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. Bc4 Nc6 5. Nc3 Nf6 6. d3 Bg4 7. Na4 Bb6 8. Nxb6 axb6 9. Be3 0-0 10. 0-0 exf4 11. Bxf4 Nd4 12. Qd2 Nxf3+ 13. gxf3 Bh3 14. Rfc1 Ra5 15. Kh1 Nh5 16. Be3 Qf6 17. Qf2 Be6 18. b4 Ra4 19. Bd4 Qf4 20. c3 Bxc4 21. dxc4 c5 22. Be3 Qf6 23. Bd2 Ra3 24. bxc5 bxc5 25. Rf1 Rfa8 26. Rfb1 Rxa2 27. Rxa2 Rxa2 28. Rxb7 Ra1+ 29. Be1 h6 30. Rb3 Nf4 31. Qe3 Qh4 32. Qxf4 Qxf4 33. Kg2 Rxe1 34. Rb2 Qc1 35. Rf2 Rg1+ 36. Kh3 Qg5 37. Rg2 Qxg2+ 38. Kh4 Qxh2# 0-1

[Event "NED-ch U14 op"]
[Site "Hengelo"]
[Date "2000.08.07"]
[Round "1"]
[White "Groen, Robbert"]
[Black "Porte, Rinze"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "55"]
[EventDate "2000.08.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 e5 2. f4 d6 3. Nf3 Nc6 4. Bc4 Be7 5. 0-0 Nf6 6. Nc3 0-0 7. d4 Bg4 8. Be3 exf4 9. Bxf4 Nh5 10. Be3 Qd7 11. Nd5 Rfe8 12. Qd2 h6 13. h3 Be6 14. Qf2 Na5 15. Nxe7+ Rxe7 16. Bd3 Bc4 17. d5 c5 18. b3 Bxd3 19. cxd3 b5 20. Bd2 Nb7 21. Rac1 Rc8 22. Nh4 Re5 23. Nf5 Rf8 24. Qf3 Nf6 25. Bc3 Ree8 26. Bxf6 gxf6 27. Qg4+ Kh7 28. Qg7# 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.14"]
[Round "9"]
[White "Groen, Robbert"]
[Black "Jacobs, Jos"]
[Result "1-0"]
[ECO "C37"]
[PlyCount "69"]
[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. f4 exf4 3. Nf3 g5 4. h3 Nc6 5. Nc3 d6 6. Bc4 Bg7 7. 0-0 g4 8. hxg4 Bxg4 9. d3 Nd4 10. Bxf4 Nxf3+ 11. Rxf3 Bxf3 12. Qxf3 Qd7 13. Bg5 Bd4+ 14. Kh1 h6 15. Bh4 c6 16. Rf1 Rh7 17. Qh5 a6 18. a3 b5 19. Ba2 a5 20. Ne2 Bxb2 21. Nf4 Nf6 22. Bxf6 Bxf6 23. Ne6 Qe7 24. Nc7+ Qxc7 25. Rxf6 Qe7 26. Re6 b4 27. Rxe7+ Kxe7 28. Qh4+ f6 29. Qh5 bxa3 30. Qf5 Rah8 31. Qe6+ Kd8 32. Qxd6+ Kc8 33. Qxc6+ Kb8 34. Qb6+ Kc8 35. Be6+ 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "7"]
[White "Bisterbosch, Jasper"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "56"]
[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 e6 2. Nf3 d5 3. e5 c5 4. d4 cxd4 5. Qxd4 Nc6 6. Bb5 Bd7 7. Bxc6 Bxc6 8. 0-0 Ne7 9. Bg5 Qc7 10. Nc3 Ng6 11. Rfe1 Be7 12. a4 0-0 13. Nb5 Bxb5 14. axb5 Bxg5 15. Nxg5 h6 16. Nf3 Qxc2 17. Rxa7 Rxa7 18. Qxa7 Qxb2 19. Qxb7 Nf4 20. h3 Nd3 21. Rf1 Nxe5 22. b6 Nc4 23. Nd2 Nxd2 24. Qc7 Nxf1 25. b7 Nd2 26. Qc8 Nc4 27. b8Q Qxb8 28. Qxb8 Rxb8 0-1

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.13"]
[Round "8"]
[White "Groen, Robbert"]
[Black "Van der Blom, Floris"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "126"]
[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Bg5 Qb6 7. Bxe7 Bxe7 8. Qd2 cxd4 9. cxd4 Bd7 10. Nc3 Rc8 11. Be2 Bb4 12. 0-0 Bxc3 13. bxc3 Qa5 14. Rfc1 Ne7 15. Qb2 b5 16. Qb4 Qxb4 17. cxb4 0-0 18. a3 a6 19. Nd2 Nf5 20. Nb3 Rc6 21. Rxc6 Bxc6 22. Rc1 Rc8 23. Bd3 Ne7 24. f4 Bb7 25. Rxc8+ Bxc8 26. Kf2 f6 27. Ke3 f5 28. g3 Kf7 29. Nc5 Ng8 30. Bc2 Nh6 31. h3 Ke7 32. a4 bxa4 33. Bxa4 Nf7 34. Bc2 Nd8 35. Bd3 Nc6 36. Bxa6 Bd7 37. b5 Nb4 38. b6 Bc6 39. b7 Nxa6 40. Nxa6 Bxb7 41. Nc5 Bc8 42. g4 fxg4 43. hxg4 Kf7 44. f5 exf5 45. gxf5 Bxf5 46. Kf4 Be6 47. Nxe6 Kxe6 48. Kg5 g6 49. Kf4 h6 50. Kg4 g5 51. Kf3 h5 52. Kg3 Kf5 53. Kf3 h4 54. Kg2 g4 55. Kf2 h3 56. Kg1 g3 57. Kf1 g2+ 58. Kg1 Ke6 59. Kh2 Kf7 60. Kg1 Kg6 61. Kh2 Kg5 62. Kg1 Kh5 63. Kf2 Kh6 1/2-1/2

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.12"]
[Round "6"]
[White "Groen, Robbert"]
[Black "Offringa, Tjaart Jan"]
[Result "1/2-1/2"]
[ECO "C02"]
[PlyCount "50"]
[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 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. Bg5 cxd4 7. cxd4 Bd7 8. Nc3 Qb6 9. Bxe7 Bxe7 10. Qd2 a6 11. Be2 Rc8 12. 0-0 Na7 13. a3 Bb5 14. Nxb5 Nxb5 15. Rac1 0-0 16. h3 f6 17. exf6 Bxf6 18. Qb4 Qd6 19. Bxb5 Qxb4 20. axb4 axb5 21. Rc5 Rxc5 22. bxc5 Ra8 23. Rb1 Ra4 24. b4 Kf7 25. g4 h6 1/2-1/2

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "5"]
[White "Bonte, Holger"]
[Black "Groen, Robbert"]
[Result "1-0"]
[ECO "C10"]
[PlyCount "77"]
[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 e6 2. d4 d5 3. Nc3 c5 4. Nf3 Nf6 5. Bg5 Be7 6. dxc5 Nxe4 7. Nxe4 dxe4 8. Qxd8+ Bxd8 9. Bxd8 exf3 10. 0-0-0 0-0 11. gxf3 Bd7 12. Bc7 Bc6 13. Bg2 Na6 14. Bd6 Rfe8 15. h4 Nb4 16. a3 Nd5 17. Bf1 Nf6 18. Rh3 b6 19. cxb6 axb6 20. Bd3 Ra5 21. Rg1 Rd8 22. Be7 Rxd3 23. cxd3 Rf5 24. Bxf6 Rxf6 25. Rhg3 g6 26. h5 Bxf3 27. hxg6 hxg6 28. Rh3 Bh5 29. Rxh5 Rxf2 30. Rb5 Rf3 31. Kc2 Rf2+ 32. Kc3 Kg7 33. Rxb6 Kf6 34. a4 Rf5 35. Ra1 g5 36. a5 g4 37. a6 g3 38. a7 g2 39. Rg1 1-0

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.11"]
[Round "4"]
[White "Groen, Robbert"]
[Black "Verdult, Maarten"]
[Result "1/2-1/2"]
[ECO "C28"]
[PlyCount "42"]
[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. f4 d6 3. Nf3 Nc6 4. Bc4 Bg4 5. 0-0 Nf6 6. Nc3 Be7 7. d3 Nd4 8. Be3 Nxf3+ 9. Rxf3 Bxf3 10. Qxf3 0-0 11. fxe5 dxe5 12. Rf1 Qd7 13. Bg5 Rae8 14. Bxf6 Bxf6 15. Qg3 Qd4+ 16. Kh1 Be7 17. Qf3 Bf6 18. Qg3 Qd6 19. Nd5 Be7 20. Ne3 Qg6 21. Qf3 Qf6 1/2-1/2

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "2"]
[White "Groen, Robbert"]
[Black "Ruygrok, Dennis"]
[Result "0-1"]
[ECO "C28"]
[PlyCount "80"]
[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. f4 d6 3. Nf3 Nc6 4. Bc4 Be7 5. 0-0 Nf6 6. Nc3 0-0 7. d3 Na5 8. Bb3 Nxb3 9. axb3 a6 10. fxe5 dxe5 11. Nxe5 Qd4+ 12. Kh1 Qxe5 13. Bf4 Qc5 14. d4 Qc6 15. Bg5 h6 16. Bh4 Bg4 17. Qd3 Rfe8 18. d5 Qd7 19. e5 Nxd5 20. Bxe7 Nxe7 21. Qg3 Ng6 22. Rae1 Qe6 23. Re3 Rad8 24. h3 Bf5 25. Re2 Nxe5 26. Rfe1 f6 27. Na2 Qd7 28. Nc1 Qc6 29. c3 Rd6 30. Qf4 Bxh3 31. Qg3 Bf5 32. Rf2 Qd7 33. Rff1 Rd2 34. Qh4 Rxb2 35. b4 Bg6 36. Rf2 Rxf2 37. Qxf2 Qf5 38. Qxf5 Bxf5 39. Nb3 Kf7 40. Kh2 Ng4+ 0-1

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.10"]
[Round "3"]
[White "Wisgerhof, Jan Willem"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "66"]
[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 e6 2. e4 d5 3. e5 c5 4. c3 Nc6 5. Bb5 Bd7 6. Nf3 Nge7 7. Bg5 h6 8. Bh4 Qb6 9. Na3 a6 10. Bxc6 Bxc6 11. Qb3 Qxb3 12. axb3 Nf5 13. dxc5 Nxh4 14. Nxh4 Bxc5 15. c4 Bd4 16. Rb1 Bxe5 17. 0-0 0-0 18. Rfe1 Bf6 19. Nf3 dxc4 20. bxc4 Bxf3 21. gxf3 Rfd8 22. b3 Rab8 23. b4 b5 24. Kg2 bxc4 25. Nxc4 Bc3 26. Na5 Bxe1 27. Rxe1 Rb6 28. Re5 Rd5 29. Nc4 Rxb4 30. Rxd5 exd5 31. Ne5 a5 32. Nc6 Rb5 33. Ne7+ Kh7 0-1

[Event "NED U14 op"]
[Site "Hengelo"]
[Date "1999.08.09"]
[Round "1"]
[White "Kool, Annelies"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "82"]
[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 e6 2. Bc4 d5 3. Bd3 c5 4. b3 Nc6 5. Nc3 Nf6 6. exd5 exd5 7. Bb5 Be7 8. Bxc6+ bxc6 9. Nf3 0-0 10. Ne5 Qd6 11. Nf3 Bg4 12. 0-0 Ne4 13. Nxe4 dxe4 14. h3 Bxf3 15. gxf3 Qe6 16. Kg2 Qe5 17. d4 cxd4 18. Bb2 Bd6 19. Rh1 Qg5+ 20. Kf1 Qb5+ 21. c4 dxc3+ 22. Kg1 cxb2 23. Rb1 Ba3 24. fxe4 Qe5 25. Qf3 Rfe8 26. b4 Bxb4 27. Qb3 Qg5+ 28. Qg3 Qxg3+ 29. fxg3 Ba3 30. Kg2 Rxe4 31. Rhd1 Rc4 32. Rd7 Rc1 33. Rxc1 bxc1Q 34. Kf3 h6 35. Ke4 Qf1 36. Ke5 Re8+ 37. Kd4 Qd1+ 38. Kc4 Qxd7 39. Kb3 Qd3+ 40. Ka4 Rb8 41. Ka5 Qb5# 0-1

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Dekker, Marcel"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "C42"]
[PlyCount "41"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Be2 Nf6 5. Nc3 Nc6 6. 0-0 Be7 7. d4 0-0 8. Ne5 Qd6 9. Bd2 Nxe5 10. Nb5 Qc6 11. dxe5 Ne4 12. Bf4 a6 13. Nd4 Qc5 14. Nb3 Qb6 15. Be3 Qe6 16. Nd4 Qb6 17. Nb3 Qe6 18. Nd4 Qb6 19. Nb3 Qe6 20. Nd4 Qb6 21. Nb3 1/2-1/2

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groen, Robbert"]
[Black "Cornelies, William"]
[Result "1/2-1/2"]
[ECO "C46"]
[PlyCount "42"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[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. Nc3 Bc5 4. Nxe5 d6 5. Nxc6 bxc6 6. Bc4 Nf6 7. 0-0 Bg4 8. Qe1 0-0 9. d3 h6 10. h3 Bh5 11. Be3 Bb6 12. Qd2 Bxe3 13. Qxe3 Re8 14. Qd2 d5 15. exd5 cxd5 16. Bb5 Re6 17. Rfe1 Rxe1+ 18. Rxe1 a6 19. Ba4 Qd6 20. d4 c6 21. Qd3 Ne8 1/2-1/2

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groen, Robbert"]
[Black "Van Kerkhof, David"]
[Result "1/2-1/2"]
[ECO "B21"]
[PlyCount "36"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. f4 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. Nc3 a6 6. Bc4 e5 7. 0-0 b5 8. Bd5 Nge7 9. Bxc6 Nxc6 10. Nd5 f5 11. exf5 Bxf5 12. Re1 Qb8 13. c3 Kd8 14. d4 cxd4 15. cxd4 e4 16. Qe2 Be7 17. Nxe7 Nxe7 18. Nd2 d5 1/2-1/2

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groen, Robbert"]
[Black "Zomer, Anoek"]
[Result "0-1"]
[ECO "C25"]
[PlyCount "62"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Nc3 Bc5 5. Bc4 d6 6. d4 Bb4 7. 0-0 Bg4 8. d5 Ne5 9. Bxf4 Nxc4 10. Qd4 Bc5 11. Qxc5 dxc5 12. Be5 Nxe5 13. Nxe5 Nh6 14. Rf2 0-0 15. h3 Bd7 16. Kh1 Qe7 17. Nxd7 Qxd7 18. Re1 c6 19. Rd2 cxd5 20. exd5 Rfe8 21. Rf1 Rad8 22. b3 Qd6 23. a4 Qg3 24. Rd3 Re3 25. Rxe3 Qxe3 26. Nd1 Qd4 27. Re1 Qxd5 28. Nc3 Qd2 29. Re7 Qxc3 30. Rxb7 Rd1+ 31. Kh2 Qe5+ 0-1

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Groenewegen, Roy"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "D30"]
[PlyCount "73"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e3 e6 2. d4 d5 3. c4 c5 4. f4 f5 5. Nf3 Nc6 6. Nc3 Nf6 7. Ne5 Ne4 8. Nxe4 Nxe5 9. fxe5 dxe4 10. d5 exd5 11. cxd5 Qa5+ 12. Qd2 Qxd2+ 13. Bxd2 Be7 14. Bb5+ Bd7 15. Bxd7+ Kxd7 16. a3 Rhe8 17. b4 cxb4 18. axb4 Rac8 19. Rc1 Rxc1+ 20. Bxc1 Bxb4+ 21. Bd2 Bxd2+ 22. Kxd2 Rxe5 23. Ra1 Rxd5+ 24. Kc3 Kd6 25. Rxa7 Rd1 26. Rxb7 Rh1 27. Rxg7 Rxh2 28. Kd4 Rh1 29. Rg5 Rg1 30. Rxf5 Rxg2 31. Rh5 Rg4 32. Rxh7 Ke6 33. Rh5 Rg3 34. Rh4 Kf6 35. Kd5 Rxe3 36. Rxe4 Rxe4 37. Kxe4 1/2-1/2

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Huistra, Hieke"]
[Black "Groen, Robbert"]
[Result "1/2-1/2"]
[ECO "C00"]
[PlyCount "24"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. e5 c5 4. d3 Nc6 5. c3 Bd7 6. b3 Be7 7. Be3 Qa5 8. Bd2 Qb6 9. Be3 f6 10. Bf4 d4 11. c4 Rc8 12. Be2 a6 1/2-1/2

[Event "Hengelo U12 op"]
[Site "Hengelo"]
[Date "1998.??.??"]
[Round "?"]
[White "Van Dommelen, Walter"]
[Black "Groen, Robbert"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "64"]
[EventDate "1998.??.??"]
[EventType "swiss"]
[EventRounds "13"]
[EventCountry "NED"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Nc6 5. Bb5 Nf6 6. 0-0 Be7 7. Bg5 0-0 8. Nc3 Bg4 9. Bxf6 Bxf6 10. h3 Bh5 11. Qd3 Bxf3 12. Qxf3 Nxd4 13. Qh5 Nxb5 14. Nxb5 c6 15. Nc3 Re8 16. Rfe1 Qd7 17. Rab1 Re6 18. Ne2 Rae8 19. Rbd1 Qe7 20. Rd2 Bg5 21. f4 Bxf4 22. Red1 Rxe2 23. Rxe2 Qxe2 24. Qxe2 Rxe2 25. Rf1 Bh6 26. b3 f6 27. a4 Rxc2 28. b4 Rb2 29. Re1 Rxb4 30. Re7 Rxa4 31. Rxb7 Re4 32. Rxa7 Be3+ 0-1

