[Event "Utrecht OKU op 41st"]
[Site "Utrecht"]
[Date "2014.06.01"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Lombaers, Peter"]
[Result "1/2-1/2"]
[ECO "C44"]
[WhiteElo "2112"]
[BlackElo "2273"]
[PlyCount "57"]
[EventDate "2014.05.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 160 Extra"]
[Source "ChessBase"]
[SourceDate "2014.07.01"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 d5 5. exd5 Qxd5 6. cxd4 Bg4 7. Be2 Bb4+ 8. Nc3 Bxf3 9. Bxf3 Qc4 10. Qb3 Qxb3 11. axb3 Nge7 12. 0-0 a6 13. Bg5 f6 14. Bh5+ Ng6 15. Rfe1+ Nce7 16. Be3 0-0-0 17. Ra4 Bd6 18. g3 Kb8 19. f4 c6 20. Ne4 Nd5 21. Bd2 Nge7 22. Ba5 b6 23. Bc3 Kb7 24. Rea1 Nc7 25. Be2 Nc8 26. Kf2 Rhe8 27. Bd3 a5 28. b4 axb4 29. Nxd6+ 1/2-1/2

[Event "Utrecht OKU op 41st"]
[Site "Utrecht"]
[Date "2014.06.01"]
[Round "5"]
[White "Ypma, Peter"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2178"]
[BlackElo "2112"]
[PlyCount "73"]
[EventDate "2014.05.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 160 Extra"]
[Source "ChessBase"]
[SourceDate "2014.07.01"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.01"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. f3 Bf5 5. c4 e6 6. dxe6 Nc6 7. exf7+ Kxf7 8. Bd3 Bb4+ 9. Nc3 Re8+ 10. Kf1 Qxd4 11. Be2 Bxc3 12. bxc3 Qxc3 13. Bg5 Nd4 14. Rc1 Bc2 15. Qd2 Qxd2 16. Bxd2 Rxe2 17. Nxe2 Bd3 18. Rc3 Bxe2+ 19. Kf2 c5 20. Re1 b5 21. cxb5 Bxb5 22. Rxc5 a6 23. Rc7+ Bd7 24. Rb7 Rc8 25. Bg5 Ne6 26. Bxf6 Nc5 27. Rxd7+ Nxd7 28. Bd4 Rc4 29. Ke3 Ra4 30. Re2 Nf8 31. Kd3 Ne6 32. Be3 Nc7 33. Kc3 Nd5+ 34. Kb3 Rb4+ 35. Kc2 Ra4 36. Kb2 Rb4+ 37. Kc2 1/2-1/2

[Event "Utrecht OKU op 41st"]
[Site "Utrecht"]
[Date "2014.05.31"]
[Round "2"]
[White "Hommerson, Paul"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2246"]
[BlackElo "2112"]
[PlyCount "83"]
[EventDate "2014.05.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 160 Extra"]
[Source "ChessBase"]
[SourceDate "2014.07.01"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 b5 7. a4 b4 8. Nd5 e6 9. Nxf6+ gxf6 10. Bc4 Qc7 11. Ba2 h5 12. 0-0 Bb7 13. f3 Nd7 14. c3 bxc3 15. Rc1 Qb6 16. Rxc3 Qxb2 17. Rc2 Qb6 18. Qd2 Nc5 19. Rb1 Qc7 20. Nb3 h4 21. Qb4 a5 22. Qc3 Be7 23. Nxc5 dxc5 24. Bxc5 Bxc5+ 25. Qxc5 Qxc5+ 26. Rxc5 Bc8 27. Rbb5 Bd7 28. Rxa5 Rxa5 29. Rxa5 Ke7 30. Bc4 Rc8 31. Bf1 Rc1 32. Ra7 Ra1 33. Kf2 Kd6 34. a5 Ra2+ 35. Ke3 Ra3+ 36. Kd2 Ra2+ 37. Kc3 Ra3+ 38. Kd2 Ra2+ 39. Kc3 Rf2 40. Bc4 Rxg2 41. a6 Rxh2 42. Rxd7+ 1-0

[Event "Utrecht OKU op 41st"]
[Site "Utrecht"]
[Date "2014.05.31"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Kokje, Joris"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2112"]
[PlyCount "53"]
[EventDate "2014.05.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 160 Extra"]
[Source "ChessBase"]
[SourceDate "2014.07.01"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.01"]
[SourceQuality "1"]

1. e4 c5 2. c3 d6 3. d4 cxd4 4. cxd4 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. h3 0-0 8. Be3 Nc6 9. Rc1 Bd7 10. Bd3 Qa5 11. 0-0 Qh5 12. Be2 Bxh3 13. Nh2 Qa5 14. gxh3 Kh8 15. f4 Nh5 16. Bxh5 gxh5 17. d5 Nb4 18. a3 Na6 19. Bd4 Rg8 20. Kh1 f5 21. Rg1 Bf6 22. Bxf6+ exf6 23. Qxh5 Qc5 24. Qxf5 Raf8 25. Rxg8+ Rxg8 26. Qxf6+ Rg7 27. Ne2 1-0

[Event "Utrecht OKU op 41st"]
[Site "Utrecht"]
[Date "2014.05.30"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Post, Maarten"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "2112"]
[BlackElo "1940"]
[PlyCount "43"]
[EventDate "2014.05.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 160 Extra"]
[Source "ChessBase"]
[SourceDate "2014.07.01"]
[SourceVersion "1"]
[SourceVersionDate "2014.07.01"]
[SourceQuality "1"]

1. f4 e5 2. e4 Nf6 3. fxe5 Nxe4 4. Nf3 Be7 5. d3 Ng5 6. d4 d6 7. Nc3 Nc6 8. Bxg5 Bxg5 9. Ne4 Be7 10. exd6 Bxd6 11. Bd3 Bg4 12. c3 Qd7 13. 0-0 0-0-0 14. Qa4 Kb8 15. Bb5 f5 16. Nxd6 Qxd6 17. Bxc6 bxc6 18. Ne5 Rdf8 19. Nxc6+ Kb7 20. Qb5+ Ka8 21. Qa6 Be2 22. Qxa7# 1-0

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.07"]
[Round "8"]
[White "Van Opheusden, Bas"]
[Black "Ten Vergert, Paul"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2115"]
[BlackElo "2279"]
[PlyCount "79"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 Bg4 6. g3 Nc6 7. Bg2 0-0-0 8. Be3 Qb4 9. a3 Qxb2 10. Na4 Qb5 11. Nc5 e5 12. Rb1 Qa5+ 13. Bd2 Rxd4 14. Nxd4 Qxc5 15. Ne2 e4 16. Be3 Qh5 17. h3 Bf3 18. Bxf3 Qxf3 19. 0-0 Bd6 20. Rb3 Qf5 21. Nd4 Qxh3 22. Nxc6 Ng4 23. Nxa7+ Kb8 24. Rxb7+ Ka8 25. Qxg4 Qxg4 26. Rfb1 Bxg3 27. Nc6 Bxf2+ 28. Kf1 Qh3+ 29. Kxf2 Qf3+ 30. Ke1 Qxe3+ 31. Kd1 Qf3+ 32. Ke1 Qh1+ 33. Ke2 Qh2+ 34. Ke1 Qh4+ 35. Ke2 Qh5+ 36. Ke1 Qh1+ 37. Ke2 Qf3+ 38. Ke1 Qc3+ 39. Kf1 Qf3+ 40. Ke1 0-1

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "5"]
[White "Blom, Vincent"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2178"]
[BlackElo "2115"]
[PlyCount "47"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nc6 3. e3 Bg4 4. Be2 e6 5. 0-0 Nf6 6. b3 Be7 7. c4 0-0 8. h3 Bf5 9. a3 Re8 10. Bb2 h6 11. b4 Bf8 12. b5 Ne7 13. Ne5 Nd7 14. Nxd7 Qxd7 15. a4 dxc4 16. Bxc4 Nc8 17. Nd2 Nd6 18. Bb3 a6 19. bxa6 Rxa6 20. Nc4 Nxc4 21. Bxc4 Raa8 22. Qb3 Be4 23. Rfc1 Bd6 24. Kh1 1/2-1/2

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "4"]
[White "Van Liempt, Michael"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "D07"]
[WhiteElo "1865"]
[BlackElo "2115"]
[PlyCount "35"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. Nf3 Nc6 2. d4 d5 3. e3 Bg4 4. c4 e5 5. Be2 exd4 6. exd4 Nf6 7. 0-0 Be7 8. b3 0-0 9. Bb2 Ne4 10. Ne5 Bxe2 11. Qxe2 Re8 12. Nxc6 bxc6 13. c5 Bf6 14. Qd3 Nxc5 15. Qd2 Ne6 16. Na3 Qd6 17. g3 Nxd4 18. Bxd4 0-1

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.05"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Bekker, Stefan"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2115"]
[BlackElo "2054"]
[PlyCount "53"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 Nc6 5. c4 d6 6. Nc3 Nf6 7. Nge2 e6 8. 0-0 Be7 9. h3 Ne5 10. Be3 Bd7 11. f4 Nxd3 12. Qxd3 Bc6 13. Nd4 0-0 14. Rad1 Qa5 15. a3 Qh5 16. Rd2 Rfd8 17. b4 d5 18. cxd5 exd5 19. e5 Ne8 20. b5 Bd7 21. Nxd5 Bf8 22. f5 Bc5 23. Qb3 Kh8 24. e6 Bc8 25. Nf4 Qh4 26. exf7 Nf6 27. Nf3 1-0

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.04"]
[Round "2"]
[White "Tempelman, Kristianne"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1902"]
[BlackElo "2115"]
[PlyCount "93"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 Bg4 5. d5 Bxf3 6. gxf3 Ne5 7. f4 Nd7 8. e4 c6 9. Bxc4 Nb6 10. Bb3 Nf6 11. Be3 g6 12. Qf3 Bg7 13. Rd1 Qc8 14. 0-0 0-0 15. Rc1 Qg4+ 16. Qxg4 Nxg4 17. Bc5 Rfe8 18. e5 Rad8 19. Rfd1 Nxd5 20. Nxd5 cxd5 21. Ba4 b6 22. Bxe8 Rxe8 23. Be3 Nxe3 24. fxe3 e6 25. Rc7 Ra8 26. Rdc1 Bf8 27. Rc8 Rxc8 28. Rxc8 Kg7 29. Kf2 Bc5 30. Rd8 a5 31. a3 h6 32. Kf3 f5 33. Rd7+ Kf8 34. Rb7 Kg8 35. b4 axb4 36. axb4 Bxb4 37. Rxb6 Bf8 38. Rxe6 Kf7 39. Ra6 Be7 40. Rc6 Kg7 41. Ke2 g5 42. Kd3 g4 43. Kd4 h5 44. Kxd5 Kf7 45. Rh6 h4 46. Rh7+ Kf8 47. Ke6 1-0

[Event "Enschede op-A U18"]
[Site "Enschede"]
[Date "2009.08.04"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Poelman, Geoffrey"]
[Result "1-0"]
[ECO "C97"]
[WhiteElo "2115"]
[BlackElo "1798"]
[PlyCount "60"]
[EventDate "2009.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[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. h3 d6 9. c3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Re8 13. Nf1 Bd7 14. Ne3 Rac8 15. dxe5 dxe5 16. Nd5 Nxd5 17. exd5 f6 18. a4 Nb7 19. h4 c4 20. h5 Bg4 21. h6 g6 22. axb5 axb5 23. Ra7 Bc5 24. d6 Qd7 25. Qd5+ Be6 26. Rxb7 Bxd5 27. Rxd7 Rcd8 28. Rg7+ Kh8 29. d7 Re7 30. Be3 Bd6 1-0

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.09"]
[Round "8"]
[White "Bogner, Sebastian"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "2467"]
[BlackElo "2172"]
[PlyCount "103"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. cxd5 Qxd5 5. e3 Bxf3 6. gxf3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. bxc3 Qd6 10. Rb1 b6 11. f4 exf4 12. e4 Nge7 13. Qf3 0-0 14. Qxf4 Qa3 15. Rg1 Ng6 16. Qg3 Rae8 17. Bd3 Qxa2 18. Kd1 Rd8 19. Ke2 Qe6 20. Kf1 Qa2 21. Bc1 Qa5 22. Bb2 Qh5 23. Be2 Qh4 24. Qxh4 Nxh4 25. Ba3 Rfe8 26. Bb5 Nf3 27. Bxc6 Nd2+ 28. Kg2 Nxb1 29. Rxb1 Re6 30. Bd5 Rg6+ 31. Kf3 Rf6+ 32. Ke3 Rh6 33. Rh1 a5 34. h4 c6 35. Bb3 b5 36. Ba2 Ra8 37. Bb1 Rb8 38. Be7 Re6 39. Bc5 b4 40. cxb4 axb4 41. Ba2 Ree8 42. Bc4 Ra8 43. Rb1 Ra3+ 44. Bd3 f5 45. e5 Rb8 46. Rxb4 Rxb4 47. Bxb4 Ra4 48. Bc5 g6 49. e6 Kg7 50. Bc2 Ra2 51. Bb3 Rb2 52. Ba4 1-0

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.07"]
[Round "7"]
[White "Van Opheusden, Bas"]
[Black "Ris, Robert"]
[Result "1/2-1/2"]
[ECO "C99"]
[WhiteElo "2172"]
[BlackElo "2415"]
[PlyCount "35"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 cxd4 13. cxd4 Rd8 14. b3 Nc6 15. Bb2 Qb6 16. Rc1 Bd7 17. Nf1 Rac8 18. Ne3 1/2-1/2

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.06"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Maiorov, Nikita"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2172"]
[BlackElo "2535"]
[PlyCount "64"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Nd5 6. cxd4 Be7 7. Qb3 Nb6 8. d5 Nb8 9. Bf4 d6 10. Bb5+ Bd7 11. exd6 cxd6 12. Nc3 0-0 13. Bxd7 N8xd7 14. Ne4 Nc5 15. Nxc5 dxc5 16. Rd1 c4 17. Qb5 Bd6 18. Be3 Qe8 19. Qxe8 Bb4+ 20. Nd2 Rfxe8 21. 0-0 Rec8 22. Ne4 Rd8 23. a3 Bf8 24. Bxb6 axb6 25. Rd2 b5 26. Rfd1 b4 27. axb4 Bxb4 28. Rd4 b5 29. b3 f5 30. Ng3 Bc3 31. Rf4 cxb3 32. Ne2 b4 0-1

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.05"]
[Round "5"]
[White "Van der Velden, Bram"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "2230"]
[BlackElo "2172"]
[PlyCount "63"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. cxd5 Bxf3 5. dxc6 Bxc6 6. Nc3 e6 7. e4 Bb4 8. f3 Qh4+ 9. g3 Qh5 10. Be3 0-0-0 11. Bg2 f5 12. 0-0 Nf6 13. e5 Bxc3 14. bxc3 Nd5 15. Qd2 Rhf8 16. c4 f4 17. gxf4 Ne7 18. Qc3 g5 19. d5 gxf4 20. Bc5 Nf5 21. dxc6 Rg8 22. cxb7+ Kxb7 23. Qb2+ Kc8 24. Rab1 Rxg2+ 25. Qxg2 Ne3 26. Qb2 Nf5 27. Qg2 Ne3 28. Bxe3 fxe3 29. Rbd1 Rf8 30. f4 Kb8 31. Rb1+ Kc8 32. Rfd1 1-0

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.04"]
[Round "4"]
[White "Lammens, Tim"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "A26"]
[WhiteElo "2350"]
[BlackElo "2172"]
[PlyCount "85"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. c4 Nc6 2. Nc3 e5 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. e4 f5 7. Nge2 Nf6 8. 0-0 0-0 9. Nd5 h6 10. h3 Kh7 11. Be3 g5 12. exf5 Bxf5 13. g4 Bg6 14. Ng3 Nd4 15. Bxd4 exd4 16. Nxf6+ Qxf6 17. Qd2 Qf4 18. Rad1 Be5 19. Bxb7 Rab8 20. Bg2 Qxd2 21. Rxd2 Bxg3 22. fxg3 Rxf1+ 23. Bxf1 c5 24. b3 a5 25. Re2 Re8 26. Rxe8 Bxe8 27. Kf2 Kg7 28. Ke2 Kf6 29. Kd2 Ke7 30. Kc2 Kd8 31. Bg2 Bg6 32. a3 Kc7 33. h4 Kb6 34. Bd5 Be8 35. Be4 Bd7 36. Bf5 Bc6 37. Be6 Kc7 38. Bf5 Kb6 39. Kd2 Kc7 40. Be6 Kd8 41. Ke2 Ke7 42. Bg8 Bb7 43. Kf2 1/2-1/2

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.03"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Van Nies, Pauline"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2172"]
[BlackElo "2158"]
[PlyCount "66"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6 6. Bc4 b5 7. Bb3 Bb7 8. 0-0 d6 9. Qe2 Nd7 10. Rd1 Be7 11. Bf4 Qb8 12. e5 Bxf3 13. Qxf3 Nxe5 14. Bxe5 dxe5 15. Qc6+ Kf8 16. Rd7 Nf6 17. Rc7 Ne8 18. Rd7 Nf6 19. Rb7 Qe8 20. Qc7 Rc8 21. Qxe5 Qc6 22. Rb8 Bb4 23. a4 Nd7 24. Rxc8+ Qxc8 25. Qf4 Bxc3 26. Rc1 Qb8 27. Qxb8+ Nxb8 28. Rxc3 Ke7 29. axb5 axb5 30. Rc5 b4 31. Rc4 Na6 32. Rc6 Nb8 33. Rc4 Na6 1/2-1/2

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.02"]
[Round "2"]
[White "Van Kampen, Robin"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2475"]
[BlackElo "2172"]
[PlyCount "97"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. 0-0 Nf6 6. e5 dxe5 7. Nxe5 Qc7 8. d4 cxd4 9. Bf4 Qd8 10. c3 e6 11. Qa4+ Nbd7 12. Rd1 Bc5 13. cxd4 Be7 14. d5 exd5 15. Nc3 0-0 16. Nxd7 Qxd7 17. Qxd7 Nxd7 18. Nxd5 Bd8 19. Ne7+ Bxe7 20. Rxd7 Bc5 21. Rxb7 Rfe8 22. Kf1 Rad8 23. Re1 Rxe1+ 24. Kxe1 Re8+ 25. Kf1 h6 26. Rb8 Rxb8 27. Bxb8 g6 28. f3 Kf8 29. Ke2 Ke7 30. Bf4 h5 31. Be3 Bd6 32. h3 a6 33. Kd3 Kd7 34. Kc4 Kc6 35. b4 Bg3 36. a4 Be1 37. b5+ axb5+ 38. axb5+ Kb7 39. Kd5 Bg3 40. Bc5 Bf4 41. Ke4 Bg3 42. f4 Kc7 43. f5 Kd7 44. fxg6 fxg6 45. Be3 Bd6 46. Kd5 Be7 47. b6 Bd8 48. b7 Kc7 49. Bb6+ 1-0

[Event "Enschede op"]
[Site "Enschede"]
[Date "2008.08.01"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Nyzhnyk, Illya"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2172"]
[BlackElo "2428"]
[PlyCount "68"]
[EventDate "2008.08.01"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 126 Extra"]
[Source "ChessBase"]
[SourceDate "2008.11.05"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.05"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Nf3 Nc6 6. cxd4 d6 7. Bc4 dxe5 8. Nxe5 e6 9. Nxc6 bxc6 10. 0-0 Be7 11. Nc3 0-0 12. Qe2 a5 13. Rd1 Qc7 14. Ne4 Rd8 15. Bg5 Bxg5 16. Nxg5 h6 17. Ne4 Nf4 18. Qe3 Ba6 19. Rac1 Bxc4 20. Rxc4 Rab8 21. b3 e5 22. g3 Qd7 23. Rdc1 Nd5 24. Qf3 exd4 25. Rxd4 Re8 26. Nc3 Qa7 27. Rc4 Ne7 28. Ne4 Ng6 29. Rc5 Rbd8 30. R5c2 Ne5 31. Qf5 Nd3 32. Rd1 Nxf2 33. Rxf2 Rxd1+ 34. Kg2 Qd7 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.31"]
[Round "9"]
[White "Zelbel, Patrick"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2286"]
[BlackElo "2172"]
[PlyCount "61"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 Nc6 6. cxd4 g6 7. Qb3 e6 8. h4 d6 9. h5 Bg7 10. h6 Bf8 11. Bb5 Bd7 12. Nbd2 Be7 13. 0-0 0-0 14. Ne4 dxe5 15. dxe5 Qc7 16. Bxc6 Bxc6 17. Bg5 Rfd8 18. Bxe7 Qxe7 19. Nfg5 Rac8 20. Rad1 Kh8 21. Qg3 Rc7 22. Nf6 Bb5 23. Rfe1 Ba4 24. b3 Be8 25. Ngxh7 Nc3 26. Rd6 Nxa2 27. Qf4 Rdc8 28. Ng5 Nc3 29. Kh2 b5 30. h7 a5 31. Ng8 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.30"]
[Round "8"]
[White "Van Opheusden, Bas"]
[Black "Goudriaan, Etienne"]
[Result "1-0"]
[ECO "B96"]
[WhiteElo "2172"]
[BlackElo "2098"]
[PlyCount "49"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qc7 8. Qf3 Nbd7 9. 0-0-0 b5 10. Bd3 Bb7 11. Rhe1 Qb6 12. Nd5 Qxd4 13. Bxf6 gxf6 14. Bxb5 Qc5 15. Nxf6+ Kd8 16. Nxd7 Qxb5 17. Nxf8 Rxf8 18. Qa3 Ke8 19. Qxd6 Qc6 20. Qd2 Rc8 21. Re3 Ke7 22. Qb4+ Kf6 23. Rd2 Rfd8 24. e5+ Kg7 25. Rg3+ 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.29"]
[Round "7"]
[White "Kuling, Lody"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B96"]
[WhiteElo "2196"]
[BlackElo "2172"]
[PlyCount "51"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[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 b5 10. Bxb5 axb5 11. Ndxb5 Qb8 12. e5 Bb7 13. Qe2 dxe5 14. Qc4 Be7 15. Nc7+ Kf8 16. Rxd7 Nxd7 17. Rd1 Bd5 18. Bxe7+ Kxe7 19. Rxd5 exd5 20. N3xd5+ Kd8 21. Nxa8 Qxa8 22. Qc7+ Ke8 23. Qd6 Kd8 24. Qc7+ Ke8 25. Qd6 Kd8 26. Qc7+ 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.28"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "De Groote, Ewoud"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2172"]
[BlackElo "2251"]
[PlyCount "65"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Nf3 e6 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 Qc7 9. Bd2 Nd7 10. Bd3 dxe5 11. 0-0 Be7 12. Nxe5 Nxe5 13. Bf4 Bd6 14. dxe5 Bxe5 15. Bb5+ Ke7 16. Bxe5 Qxe5 17. Rb1 a6 18. Qa4 Rb8 19. Qb4+ Qd6 20. Qh4+ f6 21. Rfd1 Qc7 22. Qb4+ Kf7 23. Bxa6 Rd8 24. Rxd8 Qxd8 25. Qf4 Bd7 26. Rxb7 Rxb7 27. Bxb7 Bc6 28. Ba6 Bxg2 29. Kxg2 Qa8+ 30. Kg1 Qxa6 31. Qc7+ Kg6 32. Qg3+ Kf7 33. Qc7+ 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.26"]
[Round "5"]
[White "Goldstern, Filip Daniel"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "A26"]
[WhiteElo "2370"]
[BlackElo "2172"]
[PlyCount "57"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. c4 Nc6 2. Nc3 e5 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nf3 f5 7. 0-0 Nf6 8. Rb1 0-0 9. b4 Ne7 10. b5 c6 11. bxc6 bxc6 12. c5 e4 13. cxd6 Ned5 14. dxe4 fxe4 15. Nxd5 cxd5 16. Nd4 Qxd6 17. Bf4 Qd8 18. Nb5 a6 19. Nd4 Qa5 20. Qc2 Bd7 21. Bc7 Qa3 22. Qd2 Rfc8 23. Rb7 Qa4 24. Be5 Re8 25. Rb4 Qa5 26. Nb3 e3 27. fxe3 Qxb4 28. Qxb4 Rxe5 29. Qd6 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.25"]
[Round "4"]
[White "Van Opheusden, Bas"]
[Black "Ootes, Lars"]
[Result "1-0"]
[ECO "B97"]
[WhiteElo "2172"]
[BlackElo "2223"]
[PlyCount "43"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Nc6 9. 0-0-0 Qxd4 10. Qxd4 Nxd4 11. Rxd4 Be7 12. Be2 Bd7 13. Bxf6 gxf6 14. Bh5 Rg8 15. g3 Kf8 16. Na4 Bd8 17. Rhd1 Ke7 18. Nc5 Be8 19. Rxd6 b6 20. Rd7+ Kf8 21. Nxe6+ fxe6 22. Rxd8 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.24"]
[Round "3"]
[White "Miedema, David"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "A26"]
[WhiteElo "2303"]
[BlackElo "2172"]
[PlyCount "130"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. c4 Nc6 2. Nc3 e5 3. Nf3 Nf6 4. g3 g6 5. Bg2 Bg7 6. 0-0 0-0 7. Rb1 d6 8. d3 Be6 9. b4 h6 10. Nd2 Qc8 11. Re1 Kh7 12. Ba3 a6 13. Qc1 Bh3 14. Bh1 Ng4 15. b5 axb5 16. cxb5 Nd4 17. e3 Qf5 18. Nce4 Rxa3 19. exd4 Rxd3 20. f3 Nf6 21. Nf2 Rxd4 22. Nb3 Rb4 23. Qc3 Nd5 24. Qd2 Rxb5 25. a4 Rb4 26. g4 Qe6 27. f4 Nxf4 28. Qxb4 Bxg4 29. Qe4 Bf5 30. Qxb7 Bxb1 31. Rxb1 Qf5 32. Qe4 Qh5 33. Kf1 d5 34. Qe3 Qf5 35. Rc1 Rb8 36. Nd2 Rb2 37. Ra1 d4 38. Qe4 Rxd2 39. Qxf5 gxf5 40. a5 e4 41. Nxe4 Rxh2 42. Nf2 d3 43. Ra4 d2 44. Bf3 Nh3 45. Nd1 Ng5 46. Bg2 Ne4 47. Rc4 Nc3 48. Rxc3 Bxc3 49. Nxc3 Rh4 50. Ke2 Rd4 51. a6 d1Q+ 52. Nxd1 Ra4 53. Bb7 Kg6 54. Nc3 Ra5 55. Nd5 Kg5 56. Nb4 f4 57. Nd3 Ra2+ 58. Kf3 Ra3 59. Ke4 f3 60. Nf2 Kh4 61. Kf4 f5 62. Bc8 c5 63. Bb7 c4 64. Kxf5 c3 65. Be4 Kg3 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.23"]
[Round "2"]
[White "Beijerinck, Nick"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "2106"]
[BlackElo "2172"]
[PlyCount "60"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[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 b5 10. Bd3 Bb7 11. Rhe1 Be7 12. Bxf6 Nxf6 13. a3 0-0-0 14. Re3 Qb6 15. Bf1 d5 16. exd5 Nxd5 17. Nxd5 Rxd5 18. Qf2 Rhd8 19. c3 R5d7 20. f5 Bg5 21. fxe6 fxe6 22. h4 Bxe3+ 23. Qxe3 Rd5 24. Be2 e5 25. Qh3+ Kb8 26. Nf5 Rxd1+ 27. Bxd1 Qf2 28. Bg4 Qf1+ 29. Kc2 Be4+ 30. Kb3 Qc4# 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2008.07.22"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Simutowe, Amon"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "2172"]
[BlackElo "2459"]
[PlyCount "100"]
[EventDate "2008.07.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. Qc2 dxc4 8. Bxc4 0-0 9. 0-0 b6 10. Rd1 Bxc3 11. bxc3 Qc7 12. Bd3 h6 13. Ne5 Bb7 14. Bf4 Rc8 15. Rac1 Nc6 16. f3 Qe7 17. Nxc6 Rxc6 18. Bb5 Rcc8 19. Qd3 a6 20. Ba4 b5 21. Bc2 Bd5 22. Be5 Kf8 23. a4 Bc4 24. Qd2 Nd5 25. Be4 bxa4 26. Qf2 f6 27. Bg3 a3 28. Re1 Qd7 29. Qc2 a5 30. Bd3 Kf7 31. Bxc4 Rxc4 32. Qb3 Rac8 33. Qxa3 Nxc3 34. Kh1 Nb5 35. Qa1 Rxc1 36. Rxc1 Qxd4 37. h3 Rxc1+ 38. Qxc1 a4 39. Qc6 a3 40. Qb7+ Kg6 41. Qc8 Qd1+ 42. Kh2 Qb1 43. Qxe6 Nd4 44. Qe8+ Kh7 45. Bf2 Nf5 46. g4 Qc2 47. Kg2 Nh4+ 48. Kg3 a2 49. Bd4 Qg2+ 50. Kf4 Qxf3# 0-1

[Event "Leiden LCT op 2nd"]
[Site "Leiden"]
[Date "2008.07.15"]
[Round "5"]
[White "Gorter, Yme"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2081"]
[BlackElo "2172"]
[PlyCount "73"]
[EventDate "2008.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. 0-0 g6 6. c3 Ngf6 7. Qe2 Bg7 8. d4 e6 9. Bf4 d5 10. e5 Ng8 11. dxc5 Qc7 12. b4 Ne7 13. Nbd2 0-0 14. Rfe1 h6 15. Nd4 g5 16. Bg3 Ng6 17. N2f3 g4 18. Nd2 h5 19. f4 h4 20. Bf2 Nxf4 21. Qxg4 Nd3 22. Bxh4 N3xe5 23. Qg3 Qc8 24. Be7 Re8 25. Bd6 Ng6 26. Nxe6 Rxe6 27. Rxe6 fxe6 28. Qxg6 Qe8 29. Qg3 b6 30. c6 Nf6 31. Be5 Nh5 32. Qg5 Kh7 33. Nf3 Bxe5 34. Nxe5 Ng7 35. Rf1 Nf5 36. Rf3 Qf8 37. Qg6+ 1-0

[Event "Leiden LCT op 2nd"]
[Site "Leiden"]
[Date "2008.07.12"]
[Round "2"]
[White "Van Opheusden, Bas"]
[Black "Gutman, Lev"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2172"]
[BlackElo "2497"]
[PlyCount "52"]
[EventDate "2008.07.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 125 Extra"]
[Source "ChessBase"]
[SourceDate "2008.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2008.09.01"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. cxd4 g6 6. Nf3 Bg7 7. Bc4 Nb6 8. Bb3 0-0 9. a4 a5 10. 0-0 d6 11. Nc3 Nc6 12. Be3 Bg4 13. h3 Bxf3 14. Qxf3 dxe5 15. dxe5 Nxe5 16. Qxb7 Nbc4 17. Qe4 Nd6 18. Qh4 Rb8 19. Ba2 Rb4 20. Qg3 Nf5 21. Qh2 Nxe3 22. fxe3 e6 23. Rad1 Qb6 24. Qg3 Rxb2 25. Bb1 Nc4 26. Rd3 Nd2 0-1

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2008.05.17"]
[Round "9.9"]
[White "Muhren, Bianca"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B86"]
[WhiteElo "2334"]
[BlackElo "2162"]
[PlyCount "54"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]
[WhiteTeam "Calder HMC"]
[BlackTeam "Leiden LSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 Nbd7 8. 0-0 Nc5 9. Qe2 Be7 10. f4 0-0 11. Kh1 Qc7 12. f5 e5 13. Nf3 Nxb3 14. cxb3 b5 15. Bg5 b4 16. Bxf6 bxc3 17. Bxe7 cxb2 18. Qxb2 Qxe7 19. Qe2 Bb7 20. Rad1 Rfd8 21. Rd2 Rac8 22. Qe3 f6 23. Rfd1 Qc7 24. h3 Qc6 25. Rd5 Qc7 26. R5d3 Qc6 27. Rd5 Qc7 1/2-1/2

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.05.03"]
[Round "9"]
[White "Van Opheusden, Bas"]
[Black "Van Oosterom, Chiel"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2169"]
[BlackElo "2399"]
[PlyCount "66"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Nf3 e6 6. cxd4 d6 7. a3 Bd7 8. Bd3 Bc6 9. 0-0 Nd7 10. Re1 Rc8 11. Bd2 Be7 12. exd6 Bxd6 13. Nc3 0-0 14. Ng5 N7f6 15. Nge4 Bf4 16. Rc1 Nxe4 17. Bxe4 Nxc3 18. bxc3 Bxd2 19. Qxd2 Bxe4 20. Rxe4 Qd5 21. Qd3 Qb3 22. Rh4 h6 23. Rh3 Qxa3 24. Rb1 b6 25. g4 Qa2 26. Re1 Qc4 27. Qd2 f6 28. Qe3 Rc6 29. f4 Rfc8 30. g5 hxg5 31. fxg5 Qxc3 32. gxf6 Qxe1+ 33. Qxe1 Rc1 0-1

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.05.02"]
[Round "8"]
[White "Kuling, Lody"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2192"]
[BlackElo "2169"]
[PlyCount "99"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. c4 Nf6 5. Nc3 Bf5 6. Nf3 c6 7. Bd3 Bxd3 8. Qxd3 e6 9. 0-0 Bd6 10. Bg5 0-0 11. Rad1 h6 12. Bh4 Be7 13. Rfe1 Na6 14. Qe2 Re8 15. Ne5 Nd7 16. Bg3 Nxe5 17. Bxe5 f6 18. Bf4 Bd6 19. Bc1 Qc7 20. h4 Bh2+ 21. Kh1 Bf4 22. Qg4 Bxc1 23. Rxc1 Nb4 24. Rcd1 e5 25. Ne4 Kh8 26. dxe5 Qxe5 27. Nd6 Qxe1+ 28. Rxe1 Rxe1+ 29. Kh2 Re7 30. Nf5 Rc7 31. Qd4 c5 32. Qd6 Na6 33. g4 Re8 34. f3 Kh7 35. h5 b6 36. Kg3 Rf7 37. Qd3 Kh8 38. Qa3 Nb4 39. Nd6 Ref8 40. Nxf7+ Rxf7 41. Qe3 Kg8 42. Qe4 Nxa2 43. Kf4 f5 44. gxf5 Nb4 45. Qe8+ Rf8 46. Qe6+ Kh7 47. Qe4 Rf6 48. Qb1 a5 49. Ke5 Nc6+ 50. Kf4 1/2-1/2

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.05.01"]
[Round "7"]
[White "Van Opheusden, Bas"]
[Black "Burg, Twan"]
[Result "0-1"]
[ECO "C18"]
[WhiteElo "2169"]
[BlackElo "2342"]
[PlyCount "96"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qc7 7. Qg4 f5 8. Qh5+ g6 9. Qd1 Bd7 10. Bd2 Ba4 11. Bd3 Nc6 12. Nf3 Nge7 13. 0-0 c4 14. Be2 h6 15. h4 0-0-0 16. Qc1 Ng8 17. g3 Qh7 18. Kg2 Rf8 19. Rh1 Nge7 20. Ng1 Qg7 21. Nh3 Nd8 22. Rb1 b5 23. Nf4 Kd7 24. Qb2 a5 25. Rh2 Kc6 26. Rbh1 g5 27. hxg5 hxg5 28. Nh5 Qg6 29. Nf6 Rxh2+ 30. Rxh2 f4 31. Bh5 Qf5 32. Be8+ Kc7 33. Rh7 f3+ 34. Kh2 Kc8 35. Bd7+ Kb8 36. g4 Qg6 37. Bxb5 Bb3 38. Nd7+ Ka8 39. Nxf8 Qe4 40. Kg3 Nf5+ 41. Kh3 Qe2 42. gxf5 exf5 43. Bxg5 Qf1+ 44. Kg3 Qg2+ 45. Kf4 Qg4+ 46. Ke3 Qe4+ 47. Kd2 Qe2+ 48. Kc1 Qe1# 0-1

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.30"]
[Round "6"]
[White "Bitalzadeh, Ali"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "2323"]
[BlackElo "2169"]
[PlyCount "78"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nc6 8. e5 h6 9. Bh4 g5 10. fxg5 Nd5 11. Nxc6 bxc6 12. Ne4 Qb6 13. c4 Qxb2 14. Bg3 Ne3 15. Nf6+ Kd8 16. Qa4 Qxa1+ 17. Ke2 Qc3 18. Kf2 Qc2+ 19. Qxc2 Nxc2 20. exd6 c5 21. Bd3 Nd4 22. Be4 Rb8 23. Ke3 Rb6 24. d7 Bxd7 25. Be5 Bc6 26. Ng4 Rg8 27. Nxh6 Bxe4 28. Nxg8 Bxg2 29. Rd1 Kc8 30. h4 Bd6 31. Bxd4 cxd4+ 32. Kxd4 e5+ 33. Kd3 Bc5 34. Re1 e4+ 35. Kc2 Bf3 36. Nf6 Bf2 37. Nd5 Bxe1 38. Nxb6+ Kb7 39. h5 Kxb6 0-1

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.29"]
[Round "5"]
[White "Hortensius, Nick"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1990"]
[BlackElo "2169"]
[PlyCount "86"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. 0-0 0-0 8. c4 c6 9. Nc3 Nxc3 10. bxc3 Bg4 11. Rb1 b6 12. Re1 Nd7 13. cxd5 cxd5 14. Rb5 Rc8 15. h3 Bh5 16. Bg5 Bxf3 17. Bxh7+ Kxh7 18. Qc2+ Be4 19. Rxe4 dxe4 20. Bxd8 Rfxd8 21. f3 Kg8 22. fxe4 Bf4 23. Kf2 Nf8 24. Rd5 Re8 25. Ke2 Re6 26. Kd3 Rec6 27. Rf5 Bd6 28. e5 Bb4 29. c4 b5 30. c5 Ne6 31. Qb3 Bxc5 32. d5 Nd4 33. Qb1 Rg6 34. Rf4 Rg3+ 35. Ke4 f5+ 36. Rxf5 Nxf5 37. Kxf5 Rf8+ 38. Ke6 Re8+ 39. Kf5 Re3 40. e6 Rf8+ 41. Kg4 Bd6 42. Qc2 Rg3+ 43. Kh4 Rf4+ 0-1

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.28"]
[Round "4"]
[White "Van Opheusden, Bas"]
[Black "Haast, Mark"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2169"]
[BlackElo "2125"]
[PlyCount "77"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d5 4. exd5 Nf6 5. Bb5+ Nbd7 6. Bg5 0-0 7. Bxf6 Nxf6 8. Bc4 a6 9. a4 b6 10. Nge2 Bb7 11. Nf4 Qd6 12. Qf3 b5 13. Bb3 b4 14. Nce2 e6 15. 0-0 exd5 16. Rfd1 a5 17. Rac1 Rfe8 18. c4 Rad8 19. Nxd5 Nxd5 20. cxd5 Bxd5 21. Bxd5 Qxd5 22. Qxd5 Rxd5 23. Kf1 Re7 24. b3 Red7 25. Rc6 Bh6 26. g3 Kf8 27. f4 Ke7 28. Rdc1 Kd8 29. R1c5 Bg7 30. Rxc7 Ke8 31. Rxd7 Rxc5 32. Rxf7 Kxf7 33. dxc5 Bb2 34. Kf2 Ke6 35. Ke3 Kd5 36. h3 Bf6 37. g4 Be7 38. c6 Bd6 39. Kd3 1-0

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.27"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "De Bock, Rien"]
[Result "1-0"]
[ECO "C72"]
[WhiteElo "2169"]
[PlyCount "47"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. 0-0 Bg4 6. c3 Qf6 7. d3 Nge7 8. Be3 b5 9. Bb3 Na5 10. Bc2 c5 11. a4 b4 12. Nbd2 Rb8 13. h3 Be6 14. d4 Bc4 15. Nxc4 Nxc4 16. Bc1 exd4 17. cxd4 cxd4 18. Bg5 Qe6 19. Bb3 Rc8 20. Rc1 Rc5 21. Rxc4 Rxc4 22. Nd2 Qe5 23. Nxc4 Qxg5 24. Nxd6+ 1-0

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.26"]
[Round "2"]
[White "Slagter, Ruben"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "1905"]
[BlackElo "2169"]
[PlyCount "55"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[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 Nc5 14. f6 gxf6 15. gxf6 Bf8 16. Rg1 h5 17. Re1 Nd7 18. Nxe6 fxe6 19. f7+ Ke7 20. Rg6 Bb7 21. Nd5+ Bxd5 22. exd5 Bh6+ 23. Rxh6 Rxh6 24. dxe6 Nb6 25. Bd3 Rf6 26. Qxh5 Rf8 27. Qg5 Nc4 28. Rf1 1-0

[Event "NED-ch U21"]
[Site "Venlo"]
[Date "2008.04.25"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Pruijssers, Roeland"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2169"]
[BlackElo "2413"]
[PlyCount "38"]
[EventDate "2008.04.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 123 Extra"]
[Source "ChessBase"]
[SourceDate "2008.05.06"]
[SourceVersion "1"]
[SourceVersionDate "2008.05.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 f5 4. d4 fxe4 5. Nxe5 Nf6 6. Bg5 d6 7. Nxc6 bxc6 8. d5 Be7 9. dxc6 d5 10. Be2 Rb8 11. Nd2 Qd6 12. 0-0 Qxc6 13. f3 Rxb2 14. fxe4 dxe4 15. Nb3 0-0 16. Bc1 Rxe2 17. Nd4 Qxc3 18. Qxe2 Qxd4+ 19. Be3 Qa4 0-1

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2008.02.09"]
[Round "6.9"]
[White "Van Opheusden, Bas"]
[Black "Van de Oudeweetering, Arthur"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "2162"]
[BlackElo "2368"]
[PlyCount "57"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG II"]
[BlackTeam "Homburg Apeldoorn"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 Nxe4 5. d5 Nb8 6. Bd3 Nc5 7. Nxe5 Nxd3+ 8. Nxd3 d6 9. 0-0 Be7 10. Be3 0-0 11. Nd2 Bf5 12. Nb3 Nd7 13. Na5 Rb8 14. b4 Nb6 15. c4 Bf6 16. Rc1 Qd7 17. Qb3 Rfe8 18. Nf4 Re4 19. Nh5 Be5 20. f4 Bf6 21. Nxf6+ gxf6 22. Qc3 Rbe8 23. Bd4 Re2 24. Qg3+ Kf8 25. Bxf6 Bg4 26. f5 R8e4 27. h3 h5 28. Rf4 Rxf4 29. Qxf4 1-0

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2007.12.15"]
[Round "5.9"]
[White "Vermeulen, Wesley"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "2091"]
[BlackElo "2162"]
[PlyCount "101"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]
[WhiteTeam "Utrecht"]
[BlackTeam "Leiden LSG II"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

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 Nc5 14. f6 gxf6 15. gxf6 Bf8 16. Re1 Bb7 17. Bh3 0-0-0 18. Nd5 Qa5 19. a3 Kb8 20. b4 Qa4 21. Nb6 Nb3+ 22. Qxb3 Qxb3 23. cxb3 Ka7 24. Na4 bxa4 25. bxa4 Rc8+ 26. Kd2 Rg8 27. a5 Rg6 28. Rhf1 Bh6+ 29. Kd3 Bg5 30. b5 axb5 31. Nxb5+ Ka8 32. Re2 Bxf6 33. Ref2 Ba6 34. a4 Rc3+ 35. Kd2 Rxh3 36. Rxf6 Rxh2+ 37. Kc3 Rh3+ 38. R1f3 Rxf6 39. Rxh3 d5 40. exd5 exd5 41. Nc7+ Kb7 42. Nxd5 Rc6+ 43. Kd4 Rc4+ 44. Ke5 Rxa4 45. Rxh7 Bc4 46. Rxf7+ Ka6 47. Rf6+ Kxa5 48. Nc3 Rb4 49. Rf8 Rb7 50. Kd4 Kb4 51. Nd5+ 1/2-1/2

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2007.11.24"]
[Round "4.9"]
[White "Van Opheusden, Bas"]
[Black "Groffen, Hans"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "2162"]
[BlackElo "2147"]
[PlyCount "61"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2009"]
[Source "ChessBase"]
[SourceDate "2008.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2008.11.26"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG II"]
[BlackTeam "Sas van Gent"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Qb6 8. Na4 Qa5+ 9. c3 c4 10. b4 Qc7 11. Nb2 b5 12. Be2 a5 13. a3 Be7 14. 0-0 f5 15. exf6 Nxf6 16. Ne5 Ne4 17. Qc2 axb4 18. axb4 Rxa1 19. Rxa1 0-0 20. Nd1 Bd7 21. Nf2 Nxf2 22. Bxf2 Bd6 23. Bg3 Ne7 24. Bg4 Nf5 25. Qe2 Rf6 26. Ra8+ Rf8 27. Qa2 Bxe5 28. fxe5 Nxg3 29. hxg3 Rxa8 30. Qxa8+ Qc8 31. Qxc8+ 1/2-1/2

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2007.11.03"]
[Round "3.9"]
[White "Lemmers, Oscar"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2390"]
[BlackElo "2162"]
[PlyCount "77"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]
[WhiteTeam "Enschede ESGOO"]
[BlackTeam "Leiden LSG II"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 e6 5. Bc4 Nb6 6. Bb3 d6 7. d4 dxe5 8. Nxe5 cxd4 9. cxd4 N8d7 10. Nf3 Nf6 11. 0-0 Bd7 12. Ne5 Be7 13. Nc3 Rc8 14. Qf3 Bc6 15. Qg3 0-0 16. Bh6 Ne8 17. Rad1 Bd5 18. Nxd5 Nxd5 19. Bc1 Nd6 20. Rfe1 Nf5 21. Qd3 Bf6 22. Qe4 g6 23. g3 Qd6 24. h4 Bg7 25. h5 Rc7 26. hxg6 hxg6 27. Nc4 Qd7 28. Ne5 Qd6 29. Nc4 Qd7 30. Ne3 Nfxe3 31. Bxe3 Rd8 32. Bg5 Bf6 33. Bf4 Rcc8 34. Be5 Bg7 35. Kg2 Nf6 36. Qh4 Qc6+ 37. f3 Nd7 38. Bxg7 Kxg7 39. Rxe6 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.20"]
[Round "9"]
[White "Van Opheusden, Bas"]
[Black "Van Apeldoorn, Janton"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2149"]
[BlackElo "2188"]
[PlyCount "41"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. Bd3 dxc3 5. Nxc3 Nc6 6. Bg5 e6 7. Nf3 d6 8. 0-0 Be7 9. Qe2 Ng4 10. Bxe7 Qxe7 11. Bb5 Bd7 12. Rfd1 Rd8 13. Rd2 0-0 14. Rad1 a6 15. Bxc6 Bxc6 16. Nd4 Ne5 17. f4 Ng6 18. Nxc6 bxc6 19. Qxa6 Qc7 20. g3 d5 21. Kg2 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.19"]
[Round "8"]
[White "Van den Berg, Ad"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B66"]
[WhiteElo "2248"]
[BlackElo "2149"]
[PlyCount "110"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 d6 4. d4 cxd4 5. Nxd4 Nf6 6. Bg5 e6 7. Qd2 a6 8. 0-0-0 h6 9. Be3 Ng4 10. Nxc6 bxc6 11. Bc5 Bd7 12. h3 dxc5 13. hxg4 e5 14. Bc4 Be7 15. Bxf7+ Kxf7 16. Qxd7 Qxd7 17. Rxd7 Ke6 18. Rhd1 Rad8 19. Rxd8 Rxd8 20. Rxd8 Bxd8 21. Kd1 Kd6 22. Ke2 c4 23. b4 cxb3 24. axb3 Kc5 25. Kd3 Kb4 26. g3 g5 27. Nb1 Bb6 28. f3 Bf2 29. Nd2 Bxg3 30. c3+ Kc5 31. Nc4 Bf4 32. Kc2 Bg3 33. Nb2 Bf4 34. Nd3+ Kb5 35. c4+ Kb6 36. Kc3 a5 37. Kc2 Bh2 38. Kd2 Bf4+ 39. Ke2 Bg3 40. Kd2 Bf4+ 41. Kc3 Bh2 42. Nb2 Bg1 43. Nd3 Bh2 44. b4 axb4+ 45. Kxb4 Bf4 46. Kc3 Bg3 47. Kd2 Bf4+ 48. Kd1 Bg3 49. Ke2 Bf4 50. Nb2 Kc5 51. Kd3 Kb4 52. Nd1 Kb3 53. Nc3 Kb4 54. Nd1 Kb3 55. Nc3 Kb4 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.18"]
[Round "7"]
[White "Okkes, Menno"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2386"]
[BlackElo "2149"]
[PlyCount "77"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[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 b5 9. f3 Nbd7 10. a4 b4 11. Nd5 Bxd5 12. exd5 Nb6 13. Bxb6 Qxb6 14. a5 Qb7 15. 0-0-0 g6 16. g4 Bg7 17. Kb1 0-0 18. h4 Rfe8 19. h5 e4 20. hxg6 fxg6 21. fxe4 Rxe4 22. g5 Nh5 23. Bg2 Rc4 24. Bf1 Re4 25. Bd3 Rg4 26. Be2 Rg2 27. Rdg1 Rxg1+ 28. Rxg1 Qe7 29. Nc1 Rb8 30. Rg4 Bc3 31. Qd3 Bh8 32. Qb3 Be5 33. Rxb4 Rxb4 34. Qxb4 Qxg5 35. Nb3 Qg2 36. Bxa6 Nf4 37. Bc4 Ne2 38. a6 Bd4 39. Bxe2 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.17"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Van Eijk, Sander"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2149"]
[BlackElo "2275"]
[PlyCount "109"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6 6. Bc4 b5 7. Bb3 Bb7 8. Qe2 Ne7 9. Bg5 h6 10. Be3 Ng6 11. 0-0 Be7 12. Rad1 0-0 13. Nd4 Nc6 14. f4 Nxd4 15. Bxd4 Qc7 16. Qe3 Rac8 17. Bb6 Qc6 18. Rf2 b4 19. f5 Bg5 20. Qd4 bxc3 21. fxg6 fxg6 22. Rxf8+ Rxf8 23. bxc3 Bf6 24. Qe3 Bg5 25. Qd4 Bf6 26. Qe3 Rf7 27. c4 Bg5 28. Qd4 Kh7 29. Re1 Rf4 30. Bc2 e5 31. Qc5 Rf6 32. Rb1 Ba8 33. Bd3 Qd6 34. Rb3 Bxe4 35. Qxd6 Rxd6 36. Bxe4 Rxb6 37. Rxb6 Be3+ 38. Kf1 Bxb6 39. g4 Kg8 40. Bxg6 Kf8 41. Bf5 Ke7 42. Ke2 d6 43. h4 Kd8 44. Kd3 Kc7 45. Be4 Bf2 46. h5 Kb6 47. Bd5 Kc5 48. Bb7 a5 49. a4 Kb4 50. Bc6 e4+ 51. Kxe4 Kxc4 52. Bb5+ Kc5 53. Kd3 Kd5 54. Bd7 Ke5 55. Bc8 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.16"]
[Round "5"]
[White "Afek, Yochanan"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2350"]
[BlackElo "2149"]
[PlyCount "59"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. Bxc3 e4 10. Ne5 Nxe5 11. dxe5 Ne7 12. Qe2 Be6 13. Rd1 Qc6 14. Rd6 Qa4 15. b3 Qa3 16. Qd2 Qc5 17. Bd4 Qc7 18. Bb5+ Nc6 19. 0-0 0-0 20. Rc1 Rac8 21. Bxa7 Qe7 22. Bxc6 bxc6 23. Bc5 Rfe8 24. Rxc6 Rcd8 25. Bd6 Qh4 26. b4 Ra8 27. R1c2 Ra3 28. R6c3 Rxc3 29. Rxc3 Ra8 30. a3 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.15"]
[Round "4"]
[White "Van Opheusden, Bas"]
[Black "Pg, Mohd Omar Ak Hirawa"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2149"]
[BlackElo "2316"]
[PlyCount "51"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 a6 7. Bg5 h6 8. Qb3 Be6 9. Bxe6 fxe6 10. Be3 Kf7 11. 0-0 Na5 12. Qd1 g6 13. Nh4 Nf6 14. f4 Nc4 15. Bd4 e5 16. Qb3 Rc8 17. fxe5 dxe5 18. Bxe5 g5 19. Nf5 Kg6 20. Rad1 Qa5 21. Qxb7 Nxe5 22. Qxc8 Qb6+ 23. Nd4 Neg4 24. e5 Ne3 25. exf6 e5 26. Qe8+ 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.14"]
[Round "3"]
[White "Ruijgrok, Dennis"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2330"]
[BlackElo "2149"]
[PlyCount "87"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[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. a4 b4 11. Nd5 Bxd5 12. exd5 Nb6 13. Bxb6 Qxb6 14. a5 Qb7 15. 0-0-0 g6 16. Kb1 Bg7 17. g4 0-0 18. h4 Rfe8 19. Bh3 e4 20. fxe4 Nxe4 21. Qf4 Re5 22. Bg2 Nf6 23. Rhf1 Rc8 24. Bf3 Qb5 25. g5 Rf5 26. Qd2 Nxd5 27. Be2 Qc6 28. Rxf5 gxf5 29. Bd3 f4 30. Bf5 Ne3 31. Bxc8 Qxc8 32. Re1 Bxb2 33. Rg1 Be5 34. h5 Qc3 35. Qxc3 Bxc3 36. Nc1 Nc4 37. Nd3 f3 38. Rg4 Nd2+ 39. Kc1 d5 40. Rf4 Ne4 41. Rxf3 Nxg5 42. Rf5 Ne4 43. Rxd5 Bf6 44. Nxb4 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.13"]
[Round "2"]
[White "Van Opheusden, Bas"]
[Black "Tondivar, Babak"]
[Result "1/2-1/2"]
[ECO "C18"]
[WhiteElo "2149"]
[BlackElo "2353"]
[PlyCount "89"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[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. Qh4 h6 12. Bxe7 Qxe7 13. Qxe7 Rxe7 14. Nf3 Nc6 15. 0-0 e5 16. Nxe5 Nxe5 17. dxe5 Rxe5 18. Rfe1 Rxe1+ 19. Rxe1 Bd7 20. c4 d4 21. Be4 Re8 22. Kf1 b6 23. Bd5+ Kf8 24. Rxe8+ Bxe8 25. Ke2 Ke7 26. f4 Kd6 27. g4 b5 28. Kd3 a5 29. Bg8 b4 30. axb4 axb4 31. Bd5 g5 32. f5 Ke5 33. h3 h5 34. Ke2 Ba4 35. Kd3 Bd7 36. Ke2 hxg4 37. hxg4 Bxf5 38. gxf5 Kxf5 39. Bg8 Kf4 40. Bh7 Kg3 41. Be4 g4 42. Bf5 Kf4 43. Bd7 g3 44. Bc6 Kg4 45. Bg2 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2007.10.12"]
[Round "1"]
[White "Vedder, Henk"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B50"]
[WhiteElo "2364"]
[BlackElo "2149"]
[PlyCount "112"]
[EventDate "2007.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Bd3 g6 5. 0-0 Bg7 6. Bc2 Nc6 7. d4 Bg4 8. Be3 Nd7 9. dxc5 Nxc5 10. h3 Bd7 11. Qc1 0-0 12. Bh6 Ne5 13. Nxe5 dxe5 14. Be3 Qc7 15. Nd2 b6 16. Rd1 Rfd8 17. Nb3 Nb7 18. a4 Nd6 19. Nd2 Be6 20. f3 Bf8 21. Bd3 Nc4 22. Nxc4 Bxc4 23. Bxc4 Qxc4 24. Qc2 Qc7 25. Rd3 Rxd3 26. Qxd3 Rd8 27. Qb5 e6 28. Kh2 Kg7 29. a5 Bc5 30. axb6 axb6 31. Bxc5 Qxc5 32. Qxc5 bxc5 33. Ra5 Rc8 34. Kg3 Kf6 35. Rb5 h5 36. b3 Rc7 37. h4 g5 38. hxg5+ Kxg5 39. Kf2 f5 40. g3 fxe4 41. fxe4 h4 42. gxh4+ Kf4 43. h5 Kxe4 44. Ke2 Kf4 45. h6 e4 46. b4 Rh7 47. bxc5 Rxh6 48. c6 Rh2+ 49. Kd1 Rh7 50. Rc5 Rc7 51. Ke2 e5 52. c4 Kf5 53. Ke3 Ke6 54. Kxe4 Kd6 55. Rxe5 Kxc6 56. Kd4 Rd7+ 1/2-1/2

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2007.10.06"]
[Round "2.3"]
[White "Van Opheusden, Bas"]
[Black "Spoelman, Wouter"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2162"]
[BlackElo "2454"]
[PlyCount "50"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG II"]
[BlackTeam "Hilversum HSG"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 a6 6. Bc4 d6 7. Qe2 Nd7 8. 0-0 b5 9. Bb3 Ngf6 10. Rd1 Bb7 11. Bf4 b4 12. Nd5 exd5 13. exd5+ Be7 14. Bxd6 Kf8 15. Bf4 Nh5 16. Be5 Bc5 17. Nd4 Qg5 18. Bg3 Nxg3 19. hxg3 g6 20. d6 Re8 21. Qc4 Ne5 22. Qc2 Kg7 23. f4 Nf3+ 24. gxf3 Qxg3+ 25. Kf1 Bxf3 0-1

[Event "NED-chT 0708"]
[Site "Netherlands"]
[Date "2007.09.15"]
[Round "1.7"]
[White "Middelburg, Tom"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B93"]
[WhiteElo "2398"]
[BlackElo "2162"]
[PlyCount "106"]
[EventDate "2007.09.15"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 120 Extra"]
[Source "ChessBase"]
[SourceDate "2007.11.01"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.01"]
[SourceQuality "1"]
[WhiteTeam "Leiden LSG"]
[BlackTeam "Leiden LSG II"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "NED"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. Bd3 Be7 9. 0-0 0-0 10. Kh1 b5 11. a3 Bb7 12. Qe2 Rc8 13. fxe5 dxe5 14. Bg5 Nh5 15. Bxe7 Qxe7 16. g3 Rce8 17. Nh4 g6 18. Nf5 Qe6 19. Rae1 Nc5 20. Kg1 Nf6 21. Nh6+ Kg7 22. Qe3 Ncxe4 23. Bxe4 Nxe4 24. Nxe4 Bxe4 25. Nxf7 Bxc2 26. Ng5 Qe7 27. Rxf8 Rxf8 28. Qxe5+ Qxe5 29. Rxe5 Rf5 30. Rxf5 Bxf5 31. Kf2 h5 32. Ke3 Kf6 33. Kf4 Bd3 34. b4 Bf5 35. h3 Bc8 36. Ne4+ Ke6 37. Nc3 Kd6 38. h4 Bf5 39. Nd1 Bg4 40. Ne3 Be2 41. Ke4 Ke6 42. Ng2 Bc4 43. Kd4 Bf1 44. Ne3 Bh3 45. Ke4 Bf5+ 46. Kd4 Kd6 47. Nd5 Bd7 48. Nc3 Bc6 49. Nd1 Bd7 50. Nf2 Bf5 51. Nd1 Bd7 52. Nb2 Bf5 53. Nd1 Bd7 1/2-1/2

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.11"]
[Round "9"]
[White "Van der Velden, Bram"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "D07"]
[WhiteElo "2131"]
[BlackElo "2004"]
[PlyCount "17"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. cxd5 Qxd5 4. e3 e5 5. Nc3 Bb4 6. Bd2 Bxc3 7. bxc3 Qd6 8. f3 Nf6 9. Bd3 1/2-1/2

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.10"]
[Round "7"]
[White "Schenkeveld, Daniel"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2183"]
[BlackElo "2004"]
[PlyCount "70"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. Nge2 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Be3 e5 7. Nb3 Be6 8. Nd5 Nbd7 9. f3 Nxd5 10. exd5 Bf5 11. Bd3 Bxd3 12. Qxd3 Be7 13. 0-0 0-0 14. a4 a5 15. Qb5 b6 16. Nd2 Bg5 17. Bxg5 Qxg5 18. Nc4 Rac8 19. c3 Qh6 20. Nxa5 bxa5 21. Qxd7 Rc4 22. Rf2 Rfc8 23. g3 R4c7 24. Qb5 Rc5 25. Qd3 Qg5 26. Kg2 h5 27. h4 Qe7 28. Rd2 Rc4 29. Qe3 f5 30. f4 Re4 31. Qf3 exf4 32. Qxh5 fxg3 33. Rf1 Rxh4 34. Re2 Rh2+ 35. Kxg3 Qxe2 0-1

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.09"]
[Round "6"]
[White "Gorter, Yme"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2140"]
[BlackElo "2004"]
[PlyCount "108"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 g6 5. 0-0 Bg7 6. Re1 0-0 7. Bf1 Nc6 8. h3 a6 9. a4 h6 10. d4 cxd4 11. cxd4 d5 12. e5 Ne4 13. Nc3 Bf5 14. Nh4 Be6 15. Be3 g5 16. Nf3 Rc8 17. Rc1 Qa5 18. Nd2 Rfd8 19. Nb3 Qb4 20. f3 Ng3 21. Nc5 Nxf1 22. Rxf1 Bf5 23. Nd3 Bxd3 24. Qxd3 Qxb2 25. Nd1 Qa2 26. Qf5 Nxd4 27. Qxc8 Ne2+ 28. Kh1 Ng3+ 29. Kg1 Ne2+ 30. Kh1 Rxc8 31. Rxc8+ Kh7 32. Bf2 Bxe5 33. Ne3 Nf4 34. Rc2 Qxa4 35. Rd2 e6 36. Ng4 Bc3 37. Rdd1 b5 38. Kh2 b4 39. Bd4 Ne2 40. Bc5 b3 41. Bd6 b2 42. Rb1 Qc2 43. Ne3 Qd3 44. Ng4 Nc1 45. Rfxc1 bxc1Q 46. Rxc1 f5 47. Be5 d4 48. Nf6+ Kg6 49. Nd7 Qb5 50. Nf8+ Kf7 51. Bd6 Qb2 52. Rf1 Bb4 53. Bxb4 Qxb4 54. Nd7 Qd6+ 0-1

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.08"]
[Round "5"]
[White "Van Opheusden, Bas"]
[Black "Zhang, Tony"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2004"]
[BlackElo "2220"]
[PlyCount "117"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. cxd4 d6 6. Nf3 e6 7. Nc3 Nxc3 8. bxc3 Qc7 9. Bd2 Nd7 10. exd6 Bxd6 11. Bd3 b6 12. 0-0 Bb7 13. Qe2 0-0 14. h3 Bf4 15. Bxf4 Qxf4 16. Qe3 Qxe3 17. fxe3 Rac8 18. c4 Ba6 19. Nd2 Rfd8 20. Rfc1 e5 21. Rc3 Nb8 22. Nf3 exd4 23. exd4 Nc6 24. d5 Nb4 25. Bf1 b5 26. Rb3 Nc2 27. Rc1 bxc4 28. Rc3 Nb4 29. Bxc4 Bxc4 30. Rxc4 Rxc4 31. Rxc4 Nxd5 32. Ra4 Rd7 33. Ne5 Nb6 34. Rb4 Rc7 35. a4 f6 36. a5 fxe5 37. axb6 axb6 38. Rxb6 Kf7 39. Kf2 Re7 40. Ke3 Re6 41. Rb8 Kf6 42. Rf8+ Kg6 43. Ra8 Rb6 44. Ke4 Rb2 45. Kxe5 Rxg2 46. Kf4 Kh5 47. Kf3 Rg5 48. Ra4 h6 49. Rb4 Ra5 50. Kg3 Ra3+ 51. Kg2 Ra2+ 52. Kg3 Ra3+ 53. Kg2 g5 54. Rc4 Ra2+ 55. Kg3 Ra6 56. Rc3 Rf6 57. h4 gxh4+ 58. Kh3 Rf5 59. Ra3 1/2-1/2

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.07"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Nabuurs, Mart"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2004"]
[BlackElo "2151"]
[PlyCount "61"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Nc6 5. Bb5 Bd7 6. 0-0 a6 7. Ba4 0-0-0 8. h3 g5 9. d4 g4 10. hxg4 Bxg4 11. Bxc6 bxc6 12. Qd3 Bg7 13. Bf4 Bxf3 14. Qxf3 Qf5 15. Na4 Bxd4 16. c3 e5 17. cxd4 Qxf4 18. Qxc6 Rxd4 19. Rac1 e4 20. Nb6+ Kd8 21. Qa8+ Ke7 22. Nd5+ Rxd5 23. Qxd5 Nf6 24. Qc5+ Ke6 25. Qc6+ Qd6 26. Rfd1 Nd5 27. Qa4 Qe5 28. Qxa6+ Kf5 29. Rc5 Rd8 30. Qc6 Rd6 31. Rdxd5 1-0

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.06"]
[Round "2"]
[White "Kleijn, Christov"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "B99"]
[WhiteElo "2271"]
[BlackElo "2004"]
[PlyCount "74"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[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 h6 11. Bh4 g5 12. fxg5 Ne5 13. Qe2 Nfg4 14. Nf3 Nxf3 15. Qxf3 Ne5 16. Qf2 hxg5 17. Bg3 Bd7 18. h4 gxh4 19. Bxh4 Bxh4 20. Rxh4 0-0-0 21. Rdh1 Rhg8 22. Be2 Bc6 23. Bh5 Rg5 24. Rf1 Bxe4 25. Nxe4 Rxh5 26. Kb1 Rxh4 27. Qxh4 Rg8 28. Qf2 Kb8 29. Rd1 Qc6 30. Nxd6 Rxg2 31. Qd4 Qxc2+ 32. Ka1 Rg8 33. Rb1 f6 34. Qf4 Qc7 35. Ne4 f5 36. Rc1 Nc6 37. Nd6 Rd8 0-1

[Event "Twente Young Master op-A"]
[Site "Twente"]
[Date "2007.08.06"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Van Vliembergen, Roland"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2004"]
[BlackElo "1673"]
[PlyCount "55"]
[EventDate "2007.08.06"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2008"]
[Source "ChessBase"]
[SourceDate "2007.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2007.11.25"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Qb6 8. Na4 Qa5+ 9. c3 cxd4 10. b4 Nxb4 11. cxb4 Bxb4+ 12. Bd2 Bxd2+ 13. Nxd2 b6 14. Rc1 Nc5 15. Nb2 Qxa2 16. Nd3 Qa5 17. Ra1 Qc3 18. Nxc5 bxc5 19. Bb5+ Bd7 20. Bxd7+ Kxd7 21. 0-0 Rhc8 22. Ra6 Ke8 23. f5 Qe3+ 24. Kh1 exf5 25. Rxf5 Qd3 26. Qa4+ Kf8 27. Qd7 Rc7 28. Rxf7+ 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.08.02"]
[Round "9"]
[White "Timmermans, Mark"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B81"]
[WhiteElo "2007"]
[BlackElo "2162"]
[PlyCount "27"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e6 7. g4 e5 8. Nf5 g6 9. g5 gxf5 10. exf5 d5 11. Qf3 d4 12. 0-0-0 Nbd7 13. Bc4 Qc7 14. Bb3 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.08.01"]
[Round "8"]
[White "Van Opheusden, Bas"]
[Black "Kampman, Tijmen"]
[Result "1-0"]
[ECO "C10"]
[WhiteElo "2162"]
[PlyCount "47"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bd7 5. Bd3 Bc6 6. Nf3 Nd7 7. 0-0 Ngf6 8. Nxf6+ gxf6 9. c4 Nb6 10. d5 Bd7 11. Nd4 Qe7 12. Re1 0-0-0 13. a4 Qd6 14. a5 Na8 15. a6 b6 16. dxe6 fxe6 17. Qf3 c6 18. Nb5 Qb8 19. Be4 cxb5 20. Bb7+ Kc7 21. Rxe6 Be8 22. Rc6+ Kd7 23. Qf5+ Ke7 24. Qe6# 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.31"]
[Round "7"]
[White "Ten Hertog, Hugo"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2084"]
[BlackElo "2162"]
[PlyCount "82"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 0-0 9. 0-0 Nbd7 10. Qe2 b5 11. Bb3 Bb7 12. a4 Nxe4 13. Nxe4 Bxe4 14. Rfd1 Bc6 15. c4 bxa4 16. Bxa4 Qc7 17. Bc2 Nf6 18. b4 Rfc8 19. Ne1 d5 20. b5 axb5 21. cxb5 Bb7 22. Bf5 Rxa1 23. Rxa1 Ra8 24. b6 Qd8 25. Rxa8 Qxa8 26. Bd4 e4 27. g3 Qa4 28. Qd2 Ne8 29. Nc2 Nd6 30. Bg4 Qb3 31. Ne3 Nb5 32. Nf5 Qb4 33. Nxe7+ Qxe7 34. Qb2 Nxd4 35. Qxd4 Qd6 36. Qa4 Qe7 37. Qa7 f6 38. Bc8 e3 39. Bxb7 exf2+ 40. Kxf2 Qc5+ 41. Ke2 Qc2+ 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.30"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Van der Velden, Bram"]
[Result "1/2-1/2"]
[ECO "D52"]
[WhiteElo "2162"]
[BlackElo "2079"]
[PlyCount "18"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 dxc4 8. Bxf6 Nxf6 9. Nxc4 Qc7 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.28"]
[Round "5"]
[White "Schilt, Kees Jan"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "2108"]
[BlackElo "2162"]
[PlyCount "42"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[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 h6 11. Bxf6 Nxf6 12. Rhe1 b5 13. e5 Bb7 14. Qh3 Nd5 15. Nxe6 fxe6 16. Qxe6 Nxf4 17. Bg6+ Kd8 18. exd6 Nxe6 19. dxc7+ Kxc7 20. Rxe6 Bg5+ 21. Kb1 Bxg2 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.27"]
[Round "4"]
[White "Van Opheusden, Bas"]
[Black "Suhbat, Orgilbold"]
[Result "1/2-1/2"]
[ECO "B21"]
[WhiteElo "2162"]
[BlackElo "2027"]
[PlyCount "153"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 d6 6. Bc4 e6 7. 0-0 a6 8. Be3 Nf6 9. Qe2 Be7 10. Rfd1 0-0 11. Rac1 e5 12. h3 Be6 13. Bxe6 fxe6 14. Na4 d5 15. Ng5 Qa5 16. Nb6 d4 17. Nxa8 dxe3 18. Qxe3 Rxa8 19. Qb3 h6 20. Qxb7 Rb8 21. Qxc6 hxg5 22. Qxe6+ Kf8 23. Rc6 Qa4 24. b3 Qxe4 25. Rc4 Qe2 26. Rdc1 Rd8 27. Rc8 Rxc8 28. Rxc8+ Ne8 29. Qc6 Qd1+ 30. Kh2 Qh5 31. Qf3+ Qxf3 32. gxf3 Kf7 33. Kg3 Bd6 34. Kg4 Nf6+ 35. Kxg5 Nd5 36. Rc6 Be7+ 37. Kf5 Nb4 38. Rb6 Nxa2 39. Rxa6 Nb4 40. Ra7 Nc6 41. Rb7 g6+ 42. Ke4 Ke6 43. Rb6 Kd6 44. Rb5 Bg5 45. Rd5+ Ke6 46. Rd1 Bf4 47. h4 Nb4 48. Rg1 Kf6 49. Ra1 Ke6 50. Ra5 Kd6 51. Ra7 Nc6 52. Rg7 Ne7 53. b4 Bd2 54. b5 Be1 55. b6 Bxf2 56. b7 Ba7 57. Rf7 Ke6 58. Rf8 Nc6 59. Rg8 Kf7 60. Rc8 Nb8 61. Kxe5 Ke7 62. Kf4 Kf6 63. Rd8 Ke7 64. Rh8 Kf6 65. Ke4 Nd7 66. Kd5 Bb8 67. Re8 Kf7 68. Re1 Kf6 69. Re4 Kf7 70. Rb4 Kf6 71. Ke4 Bd6 72. Rb5 Ke6 73. f4 Nf6+ 74. Kf3 Bb8 75. Rg5 Kf7 76. f5 gxf5 77. Rxf5 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.26"]
[Round "3"]
[White "Ootes, Lars"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "2064"]
[BlackElo "2162"]
[PlyCount "51"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[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 Qd8 16. h4 Bf6 17. fxe6 0-0 18. Bh3 g6 19. Qe2 Nc4 20. Nd5 Bxd4 21. e7 Bxb2 22. exd8Q Rxd8 23. Bxc8 Raxc8 24. Ne7+ Kh8 25. Nxc8 Rxc8 26. Qxc4 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.25"]
[Round "2"]
[White "Van Opheusden, Bas"]
[Black "Blees, Enrico"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "2162"]
[BlackElo "2057"]
[PlyCount "48"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 g6 6. Nf3 Bg7 7. Bf4 0-0 8. c5 b6 9. Nb5 Nc6 10. Nc7 Nh5 11. Nxa8 Nxf4 12. cxb6 axb6 13. Qb3 Bf5 14. Nxb6 Bxd4 15. Rc1 Bxb6 16. Rxc6 Ba5+ 17. Kd1 d4 18. Ne5 d3 19. f3 Qd4 20. Qb5 Nd5 21. Nxd3 Ne3+ 22. Ke2 Rd8 23. Qc5 Qxd3+ 24. Kf2 Be1+ 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2007.07.24"]
[Round "1"]
[White "Barua, Dibyendu"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B92"]
[WhiteElo "2462"]
[BlackElo "2162"]
[PlyCount "61"]
[EventDate "2007.07.24"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. 0-0 0-0 9. Kh1 Nc6 10. Be3 Be6 11. f3 Rc8 12. Nd5 Bxd5 13. exd5 Nb8 14. a4 Nh5 15. g3 Nd7 16. a5 g6 17. c4 Ng7 18. Bd3 h5 19. Nd2 Bg5 20. Bf2 f5 21. b4 e4 22. fxe4 Ne5 23. Nf3 Nxc4 24. Bxc4 Rxc4 25. Bb6 Qf6 26. e5 dxe5 27. d6 Ne6 28. Qd5 Rg4 29. Nxe5 Kh7 30. Nxg4 hxg4 31. Rae1 1-0

[Event "Leiden LCT op 1st"]
[Site "Leiden"]
[Date "2007.07.17"]
[Round "5"]
[White "Van Opheusden, Bas"]
[Black "Van Kempen, Roderick"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "2162"]
[BlackElo "1992"]
[PlyCount "65"]
[EventDate "2007.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. b4 cxd4 7. Nb5 Bc7 8. Nf3 Ne7 9. Bd3 Bd7 10. Nxc7+ Qxc7 11. 0-0 Nbc6 12. Re1 0-0-0 13. Bb2 Kb8 14. Rb1 f6 15. exf6 gxf6 16. b5 e5 17. bxc6 Nxc6 18. Bb5 Bg4 19. h3 Bc8 20. Nh4 Rhg8 21. Qf3 Ka8 22. a4 e4 23. Qxf6 Rdf8 24. Qh6 Bxh3 25. Bxc6 bxc6 26. Bxd4 c5 27. Be5 Qd7 28. Re3 Rc8 29. Reb3 Be6 30. Rb7 Qc6 31. Nf5 a6 32. Qxh7 Bxf5 33. Ra7# 1-0

[Event "Leiden LCT op 1st"]
[Site "Leiden"]
[Date "2007.07.16"]
[Round "4"]
[White "Van Opheusden, Bas"]
[Black "Van der Wiel, John"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2162"]
[BlackElo "2487"]
[PlyCount "86"]
[EventDate "2007.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 119 Extra"]
[Source "ChessBase"]
[SourceDate "2007.09.04"]
[SourceVersion "1"]
[SourceVersionDate "2007.09.04"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d5 4. exd5 Nf6 5. Nf3 Nxd5 6. Bc4 e6 7. cxd4 Be7 8. 0-0 0-0 9. Nbd2 b6 10. Ne4 Bb7 11. Qe2 Nd7 12. Re1 N7f6 13. Neg5 Qd6 14. Ne5 h6 15. Ne4 Nxe4 16. Qxe4 Rac8 17. Bd3 f5 18. Qf3 Bf6 19. b3 Rc7 20. Qg3 Nb4 21. Ba3 Bxe5 22. dxe5 Qxd3 23. Bxb4 Qxg3 24. hxg3 Rfc8 25. Rad1 Bd5 26. Ba3 Rc2 27. Rc1 g5 28. Red1 R8c6 29. Rxc2 Rxc2 30. Ra1 Kf7 31. Bc1 Ke8 32. Be3 Kd7 33. Kf1 Kc6 34. Ke1 Bxg2 35. Kd1 Be4 36. Rc1 Rxc1+ 37. Kxc1 Bf3 38. Kd2 Kd5 39. Kd3 Be4+ 40. Kc3 Bb1 41. Kb2 Bd3 42. Kc3 Ke4 43. Bc1 Bb1 0-1

[Event "Leiden Noteboom Memorial 67th"]
[Site "Leiden"]
[Date "2007.02.17"]
[Round "2"]
[White "Van Opheusden, Bas"]
[Black "Smeets, Jan"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2162"]
[BlackElo "2538"]
[PlyCount "68"]
[EventDate "2007.02.16"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "NED"]
[SourceTitle "CBM 116 Extra"]
[Source "ChessBase"]
[SourceDate "2007.03.07"]
[SourceVersion "1"]
[SourceVersionDate "2007.03.07"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Bc4 a6 6. Nf3 Ne7 7. Bg5 f6 8. Be3 b5 9. Bb3 Nbc6 10. Nd4 Nxd4 11. Bxd4 Nc6 12. Be3 Qe7 13. 0-0 Na5 14. Bd5 Bb7 15. Re1 Qf7 16. Qd4 Be7 17. Bxb7 Nxb7 18. Rad1 Bc5 19. Qd3 d6 20. Bxc5 dxc5 21. Nxb5 0-0 22. Nc3 Na5 23. Qd6 Nc4 24. Qxc5 Rfc8 25. Qd4 Nxb2 26. Rb1 Nc4 27. Na4 e5 28. Qd3 Rd8 29. Qc3 Rac8 30. Rec1 Nd6 31. Qd3 Qxa2 32. Rxc8 Rxc8 33. Nc3 Rxc3 34. Rb8+ Rc8 0-1

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.08.03"]
[Round "9"]
[White "Drost, Peter"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B78"]
[WhiteElo "2118"]
[BlackElo "2155"]
[PlyCount "77"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4 Bd7 10. 0-0-0 Rc8 11. Bb3 Ne5 12. Kb1 Nc4 13. Bxc4 Rxc4 14. g4 b5 15. b3 Rc8 16. Ndxb5 Qa5 17. a4 a6 18. Nd5 Qxd2 19. Nxe7+ Kh8 20. Rxd2 axb5 21. Nxc8 Rxc8 22. Rxd6 Bxg4 23. fxg4 Nxe4 24. Rd3 bxa4 25. Bd4 axb3 26. cxb3 Rb8 27. Bxg7+ Kxg7 28. Rc1 Nf2 29. Rg3 Re8 30. Kb2 Rd8 31. Rc4 Nd3+ 32. Kc3 Ne5 33. Rc5 Nd7 34. Rd3 Kf6 35. Rc7 Ke6 36. b4 f5 37. gxf5+ gxf5 38. Kd2 f4 39. Ke2 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.08.02"]
[Round "8"]
[White "Van Herwaarden, Arjen"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B22"]
[BlackElo "2155"]
[PlyCount "55"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. cxd4 e6 6. Nf3 b6 7. Bd3 Bb7 8. 0-0 d6 9. Nbd2 Nd7 10. Ne4 dxe5 11. dxe5 Qc7 12. Re1 Nc5 13. Bb5+ Bc6 14. Nd4 Bxb5 15. Nxb5 Qd7 16. Nbd6+ Bxd6 17. Nxd6+ Kf8 18. Qf3 Nb7 19. Ne4 Rc8 20. b3 b5 21. Rd1 Qc6 22. Ba3+ b4 23. Rxd5 bxa3 24. Rd4 h6 25. Rad1 Kg8 26. Rd7 Kh7 27. Qxf7 Qxd7 28. Nf6# 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.08.01"]
[Round "7"]
[White "Van Opheusden, Bas"]
[Black "Otte, Marijn Willem"]
[Result "1/2-1/2"]
[ECO "B97"]
[WhiteElo "2155"]
[BlackElo "2117"]
[PlyCount "87"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. Nf3 d6 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Nb3 Qa3 10. Bxf6 gxf6 11. Be2 h5 12. 0-0 Nc6 13. Nb1 Qb2 14. a3 Bh6 15. Nc3 Na5 16. Rad1 Qxa3 17. Nxa5 Qxa5 18. Qxd6 Bf8 19. Qd3 Bb4 20. Na2 Be7 21. Nc1 b5 22. e5 f5 23. Bxh5 Ra7 24. Bf3 Bc5+ 25. Kh1 Qc7 26. c4 bxc4 27. Qxc4 Rxh2+ 28. Kxh2 Bg1+ 29. Rxg1 Qxc4 30. Ne2 Bb7 31. Rc1 Qb4 32. Rb1 Qe7 33. Kg3 Kf8 34. Nd4 Bxf3 35. Rb8+ Kg7 36. gxf3 Rd7 37. Kf2+ Kh7 38. Rh1+ Kg7 39. Rg1+ Kh7 40. Rh1+ Kg7 41. Rhh8 f6 42. Rbg8+ Kf7 43. Rc8 Kg6 44. Rcg8+ 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.31"]
[Round "6"]
[White "Struik, Tjapko"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "D07"]
[WhiteElo "2244"]
[BlackElo "2155"]
[PlyCount "92"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. Nf3 Nf6 5. e3 Bg4 6. Bxc4 e6 7. h3 Bh5 8. a3 Bd6 9. b4 0-0 10. Bb2 e5 11. d5 Ne7 12. g4 Bg6 13. Nd2 c6 14. dxc6 Nxc6 15. h4 h6 16. g5 hxg5 17. hxg5 Nh7 18. Nde4 Be7 19. Qg4 Qc8 20. Qh4 Nd4 21. exd4 Qxc4 22. Rd1 Rfd8 23. d5 Rac8 24. d6 Bxg5 25. Nxg5 Qxh4 26. Rxh4 Nxg5 27. Ke2 Rc6 28. Nd5 Rc2+ 29. Ke3 f6 30. Ne7+ Kf7 31. Ba1 Ra2 32. Nxg6 Rxa3+ 33. Ke2 Kxg6 34. Rc4 Ra6 35. d7 Kf7 36. Rc7 Rb6 37. Rc8 Ke7 38. f4 Rxd7 39. fxg5 Rxd1 40. Kxd1 fxg5 41. Bxe5 Rxb4 42. Rc7+ Ke6 43. Bc3 Rb5 44. Rxg7 Kf5 45. Bd2 Kg4 46. Bxg5 Rxg5 1/2-1/2

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.29"]
[Round "5"]
[White "Van Opheusden, Bas"]
[Black "Van de Peut, Aart A"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2155"]
[BlackElo "2027"]
[PlyCount "83"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. e5 c5 4. b4 b6 5. c3 Bd7 6. a3 Qc7 7. d4 Nc6 8. Bd3 f6 9. Bf4 f5 10. g4 Nge7 11. gxf5 Nxf5 12. Bxf5 exf5 13. dxc5 Be6 14. b5 Ne7 15. Nd4 Qc8 16. c6 Ng6 17. Bg5 Bc5 18. 0-0 f4 19. Nd2 Bh3 20. e6 Bxd4 21. cxd4 0-0 22. Re1 Bxe6 23. h4 f3 24. Qb3 h6 25. Nxf3 hxg5 26. Nxg5 Bf7 27. Nxf7 Qg4+ 28. Qg3 Qxg3+ 29. fxg3 Rxf7 30. Re6 Rf6 31. Rae1 Kf7 32. R6e3 a6 33. h5 Nf8 34. Re7+ Kg8 35. c7 axb5 36. Re8 Rxa3 37. c8Q Rxg3+ 38. Kh2 Rg5 39. R8e5 Rf2+ 40. Kh3 Rf3+ 41. Kh4 Rg2 42. Rf5 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.28"]
[Round "4"]
[White "Van Vliet, Gert Jan"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B90"]
[BlackElo "2155"]
[PlyCount "109"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Qf3 g6 7. h3 Bg7 8. Be3 Nbd7 9. g4 Nc5 10. 0-0-0 Qa5 11. Kb1 0-0 12. g5 Nfd7 13. Nd5 Qd8 14. Nb3 Nxb3 15. axb3 e6 16. Nc3 Qc7 17. Bd4 Ne5 18. Qg3 f6 19. h4 b5 20. gxf6 Bxf6 21. h5 Bb7 22. f4 Nc6 23. Bxf6 Rxf6 24. f5 Ne5 25. Qh4 Qg7 26. hxg6 hxg6 27. Rxd6 b4 28. Nd5 Bxd5 29. exd5 Nf3 30. Qxb4 exf5 31. Rxf6 Qxf6 32. Bc4 Ne5 33. d6+ Nxc4 34. Qxc4+ Kg7 35. Qc7+ Kf8 36. d7 Kg8 37. Qc8+ Qf8 38. Qc4+ Kg7 39. Qd4+ Kf7 40. Qe5 Qg8 41. Re1 Qf8 42. Rd1 Rd8 43. Qd5+ Kg7 44. c4 f4 45. c5 f3 46. c6 f2 47. Qd4+ Kg8 48. Qc4+ Kg7 49. Qc3+ Kg8 50. Qd3 Qf4 51. Qc4+ Qxc4 52. bxc4 Rf8 53. c7 f1Q 54. Rxf1 Rxf1+ 55. Ka2 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.27"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Van Kampen, Robin"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2155"]
[BlackElo "2475"]
[PlyCount "80"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 Qc7 7. Qe2 Nf6 8. e5 Ng4 9. Bf4 a6 10. h3 Nh6 11. Bxh6 gxh6 12. 0-0 b5 13. Bd3 Bb7 14. Rac1 Be7 15. Qe3 Rg8 16. Bxh7 Rg7 17. Be4 Bg5 18. Nxg5 hxg5 19. Bf3 Qb8 20. Rfd1 Qa7 21. Qe2 Rd8 22. Ne4 Ba8 23. Nf6+ Ke7 24. Bxc6 Bxc6 25. Qd2 Bd5 26. Qb4+ d6 27. Nxd5+ exd5 28. exd6+ Rxd6 29. Rxd5 Rgg6 30. Rxd6 Rxd6 31. Rd1 Qd7 32. Kf1 Ke6 33. Rxd6+ Qxd6 34. Qxd6+ Kxd6 35. Ke2 Ke5 36. Ke3 f5 37. g3 a5 38. f4+ Kf6 39. Kd4 gxf4 40. gxf4 Kg6 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.26"]
[Round "2"]
[White "Jellema, Yme Jan"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B87"]
[BlackElo "2155"]
[PlyCount "57"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Be3 b5 8. Bb3 Bb7 9. 0-0 Nbd7 10. f4 Rc8 11. Kh1 b4 12. Na4 Bxe4 13. Qe2 Nc5 14. Nxc5 dxc5 15. Ba4+ Nd7 16. Bg1 Bd5 17. Nxe6 fxe6 18. f5 Ke7 19. fxe6 Nf6 20. Rad1 Qd6 21. Bd7 Rc7 22. Rxf6 gxf6 23. Qh5 Rxd7 24. exd7 Bxg2+ 25. Kxg2 Rg8+ 26. Kh1 Qc6+ 27. Rd5 Bh6 28. Bxc5+ Kd8 29. Qf7 1-0

[Event "Dieren op"]
[Site "Dieren"]
[Date "2006.07.25"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Roy Chowdhury, Saptarshi"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2155"]
[BlackElo "2394"]
[PlyCount "86"]
[EventDate "2006.07.25"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 113 Extra"]
[Source "ChessBase"]
[SourceDate "2006.09.14"]
[SourceVersion "1"]
[SourceVersionDate "2006.09.14"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d3 4. Bxd3 g6 5. c4 Bg7 6. Ne2 d6 7. Nbc3 Nf6 8. 0-0 0-0 9. h3 Nbd7 10. Be3 b6 11. b3 Bb7 12. Rc1 Rc8 13. Nd5 e6 14. Nxf6+ Nxf6 15. Nc3 Qe7 16. Re1 Rcd8 17. Qc2 Rd7 18. a4 Rc8 19. Bg5 h6 20. Bh4 g5 21. Bg3 Nh5 22. Bh2 Nf4 23. Ne2 Be5 24. Qd2 Qf6 25. Bb1 Kh8 26. Kh1 Rg8 27. Qe3 Rc7 28. Rcd1 Rc5 29. Nd4 g4 30. hxg4 Nxg2 31. Bxe5 dxe5 32. Kxg2 exd4 33. Qxd4 e5 34. Qe3 Rxg4+ 35. Kf1 Bc8 36. Rd5 Rc6 37. Red1 Rf4 38. Qg3 Bg4 39. Rd8+ Kh7 40. R1d2 Qg5 41. Bc2 Rf3 42. Qh2 Rh3 43. f4 Rf6 0-1

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.06"]
[Round "9"]
[White "Op den Kelder, Joram"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B99"]
[WhiteElo "2226"]
[BlackElo "2201"]
[PlyCount "93"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Qc7 9. 0-0-0 Nbd7 10. Bd3 h6 11. Bh4 g5 12. fxg5 Ne5 13. Qe2 Nfg4 14. Nf3 hxg5 15. Bg3 b5 16. h3 Nxf3 17. hxg4 Rxh1 18. Rxh1 Nh4 19. e5 d5 20. Be1 b4 21. Nd1 Bb7 22. Rh3 Qa5 23. g3 Ng6 24. Bxg6 fxg6 25. Rh7 Qc5 26. Qd3 Rc8 27. Qxg6+ Kd7 28. Bd2 d4 29. Bxg5 Qxc2+ 30. Qxc2 Rxc2+ 31. Kxc2 Be4+ 32. Kb3 Bxh7 33. Bxe7 Kxe7 34. Kxb4 Bd3 35. Nf2 Be2 36. g5 Kf7 37. Nh3 a5+ 38. Kb3 Bb5 39. Nf4 Bf1 40. Kc2 Bc4 41. b3 Bf1 42. Kd2 Bb5 43. a3 Ba6 44. b4 Bb5 45. Ne2 d3 46. Nf4 Ba6 47. a4 1-0

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.05"]
[Round "8"]
[White "Van Opheusden, Bas"]
[Black "Michielsen, Joost"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2201"]
[BlackElo "2368"]
[PlyCount "50"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. Nc3 d5 2. e4 dxe4 3. Nxe4 Bf5 4. Ng3 Bg6 5. Nf3 Nd7 6. Bc4 e6 7. h4 h6 8. h5 Bh7 9. d3 Ngf6 10. Qe2 c6 11. Bd2 Qc7 12. 0-0-0 b5 13. Bxe6 fxe6 14. Qxe6+ Be7 15. Rhe1 Nc5 16. Qe3 Nb7 17. Nd4 Nd5 18. Qf3 0-0-0 19. Ne6 Qd7 20. Nxd8 Rxd8 21. Ne4 Rf8 22. Qg3 Bd6 23. Nxd6+ Nxd6 24. Re5 Nf5 25. Qg4 Kb7 1/2-1/2

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.04"]
[Round "7"]
[White "Van Opheusden, Bas"]
[Black "Schwartz, Marc"]
[Result "1-0"]
[ECO "B21"]
[WhiteElo "2201"]
[PlyCount "111"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d3 4. c4 Nc6 5. Nc3 d6 6. Bxd3 g6 7. Nge2 Bg7 8. 0-0 Nf6 9. h3 0-0 10. Be3 Ne5 11. f4 Nxd3 12. Qxd3 a6 13. Rfd1 Bd7 14. e5 Bf5 15. Qd2 dxe5 16. fxe5 Qxd2 17. Rxd2 Ne4 18. Nxe4 Bxe4 19. Nc3 Bc6 20. Bf4 e6 21. Rad1 h6 22. b4 Rfc8 23. c5 g5 24. Bg3 Bf8 25. Rd4 Be7 26. Ne4 Bxe4 27. Rxe4 Rd8 28. Red4 Rxd4 29. Rxd4 Rd8 30. Rxd8+ Bxd8 31. Kf2 Bc7 32. Kf3 Kh7 33. a4 Kg6 34. b5 axb5 35. axb5 f5 36. exf6 e5 37. Ke4 Kxf6 38. b6 Bb8 39. Kd5 h5 40. Bh2 g4 41. Ke4 Ke6 42. hxg4 hxg4 43. Bg3 Kf6 44. Bh4+ Ke6 45. Bg5 Kd7 46. Kd5 e4 47. Kxe4 Kc6 48. Be3 Kb5 49. Kf5 g3 50. Kf6 Kc6 51. Ke6 Kb5 52. Kd5 Ka5 53. c6 bxc6+ 54. Kxc6 Be5 55. b7 Bb8 56. Bb6+ 1-0

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.02"]
[Round "6"]
[White "Breukelman, Jan"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2067"]
[BlackElo "2201"]
[PlyCount "68"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. Nf3 c5 2. e4 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Be3 Nbd7 9. g4 b5 10. g5 b4 11. Nd5 Nxd5 12. exd5 Bf5 13. Bd3 g6 14. Qe2 a5 15. Nd2 Bg7 16. 0-0-0 0-0 17. h4 Nb6 18. Bxb6 Qxb6 19. h5 Ra7 20. Bxf5 gxf5 21. h6 Bh8 22. Qd3 a4 23. Rh4 b3 24. cxb3 a3 25. Rc4 Qa6 26. Qc2 e4 27. Ra4 axb2+ 28. Kb1 Qb6 29. Nc4 Qc7 30. Rxa7 Qxa7 31. fxe4 f4 32. a4 f3 33. Nxd6 f2 34. Nf5 Re8 1-0

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.02"]
[Round "5"]
[White "Van Opheusden, Bas"]
[Black "Zhang, Tony"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2201"]
[BlackElo "2166"]
[PlyCount "44"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. c3 Nf6 5. e5 Nd5 6. cxd4 d6 7. a3 Bd7 8. Bd3 Bc6 9. 0-0 Nd7 10. Re1 Rc8 11. Ng5 dxe5 12. Nxe6 fxe6 13. Qh5+ Ke7 14. dxe5 h6 15. Nc3 Nc5 16. Bg6 Kd7 17. Be3 Nxe3 18. Rxe3 Qg5 19. Qd1+ Kc7 20. Be4 Nxe4 21. Nxe4 Bxe4 22. Rxe4 Kb8 0-1

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.05.01"]
[Round "4"]
[White "Otte, Marijn Willem"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "C22"]
[WhiteElo "2132"]
[BlackElo "2201"]
[PlyCount "86"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qe3 Nf6 5. Nc3 Bb4 6. Bd2 0-0 7. 0-0-0 Re8 8. Qg3 d6 9. f4 Nxe4 10. Nxe4 Rxe4 11. c3 Bc5 12. Bd3 Re8 13. Nh3 Qf6 14. Nf2 Bxf2 15. Qxf2 Bf5 16. Be2 Qe6 17. g4 Qxe2 18. Qxe2 Rxe2 19. gxf5 f6 20. Kc2 Rae8 21. Kd3 Kf7 22. b4 Rg2 23. Rdg1 Ree2 24. Rxg2 Rxg2 25. a4 Ne7 26. Be3 b6 27. Ra1 Nxf5 28. a5 Nxe3 29. axb6 axb6 30. Kxe3 Ke7 31. f5 g6 32. fxg6 hxg6 33. h4 Rg3+ 34. Kd2 f5 35. Rh1 Ke6 36. h5 gxh5 37. Rxh5 Rg7 38. Kd3 Ke5 39. Rh3 Kf4 40. Kd4 Rf7 41. Kd5 Re7 42. c4 Kg4 43. Rh8 f4 0-1

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.04.30"]
[Round "3"]
[White "Van Opheusden, Bas"]
[Black "Rietman, Frits"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2201"]
[BlackElo "2175"]
[PlyCount "119"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. cxd4 Nc6 6. Nf3 d6 7. Bc4 Nb6 8. Bb3 d5 9. 0-0 Bg4 10. Be3 e6 11. Nc3 Rc8 12. Rc1 Be7 13. Bc2 Nc4 14. b3 Nxe3 15. fxe3 Ba3 16. Nb5 Be7 17. Nc3 0-0 18. Qd3 Bf5 19. Qd2 Ba3 20. Bxf5 Bxc1 21. Bxh7+ Kxh7 22. Qxc1 Kg8 23. Qd2 f6 24. Ne2 fxe5 25. dxe5 Qb6 26. Ned4 Nxd4 27. Qxd4 Qxd4 28. Nxd4 Rxf1+ 29. Kxf1 Kf7 30. a4 Rh8 31. h3 Rh4 32. Kf2 Ke7 33. Ke2 Re4 34. Nf3 d4 35. Nxd4 Rxe5 36. Kf3 Rc5 37. Ke4 Kf6 38. g4 a6 39. h4 g6 40. Kd3 Rc1 41. Ke4 Rc3 42. g5+ Ke7 43. Nf3 Rxb3 44. Ne5 Rb4+ 45. Kf3 Rxa4 46. Nxg6+ Kf7 47. Ne5+ Kg7 48. h5 a5 49. h6+ Kh7 50. e4 Ra1 51. Nd7 Kg6 52. Kg2 Rc1 53. Nf8+ Kf7 54. Nd7 a4 55. Ne5+ Kg8 56. g6 Rc7 57. h7+ Kg7 58. Nf7 Rc8 59. Nd6 Rb8 60. Kg3 0-1

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.04.29"]
[Round "2"]
[White "Van der Knijff, Kees"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "D07"]
[BlackElo "2201"]
[PlyCount "64"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nc3 dxc4 4. d5 Ne5 5. Qd4 Ng6 6. e4 e5 7. Qxc4 a6 8. Nf3 Nf6 9. Bg5 Bd6 10. Be2 h6 11. Bd2 0-0 12. 0-0 Nh5 13. Rfe1 Nhf4 14. Bd1 b5 15. Qb3 Bg4 16. h3 Bh5 17. g3 Nxh3+ 18. Kg2 Bxf3+ 19. Bxf3 Nhf4+ 20. Bxf4 exf4 21. Ne2 Qg5 22. Rh1 fxg3 23. fxg3 Nf4+ 24. Nxf4 Bxf4 25. Be2 Rae8 26. Qf3 Bd6 27. Rh5 Qg6 28. Bd3 Re5 29. Rh4 Qg5 30. Rf1 f5 31. Rf4 Rxe4 32. Rxf5 Rxf5 0-1

[Event "NED-ch U20"]
[Site "Schagen"]
[Date "2006.04.28"]
[Round "1"]
[White "Van Opheusden, Bas"]
[Black "Pruijssers, Roeland"]
[Result "0-1"]
[ECO "C95"]
[WhiteElo "2201"]
[BlackElo "2369"]
[PlyCount "66"]
[EventDate "2006.04.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. a4 c5 13. Bc2 Re8 14. Nf1 Bf8 15. d5 c4 16. N3h2 Nc5 17. Bg5 Be7 18. Qf3 Nxd5 19. Bxe7 Nxe7 20. Ne3 Qd7 21. Rad1 Rf8 22. Nf5 Nxf5 23. Qxf5 Qe7 24. Re3 Rad8 25. Rg3 Ne6 26. Ng4 g6 27. Ne3 Nf4 28. Qg4 Kh8 29. b3 cxb3 30. Bxb3 Bxe4 31. axb5 f5 32. Qg5 Qxg5 33. Rxg5 h6 0-1

[Event "Muensterland Verbandsliga 0506"]
[Site "Germany"]
[Date "2006.01.28"]
[Round "6.6"]
[White "Wetter, Ralf"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "A08"]
[WhiteElo "1953"]
[BlackElo "2201"]
[PlyCount "142"]
[EventDate "2005.08.27"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]
[WhiteTeam "Heiden"]
[BlackTeam "Gronau"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 c5 2. d3 g6 3. g3 Bg7 4. Bg2 Nc6 5. 0-0 e6 6. Nbd2 d5 7. e4 Nge7 8. c3 0-0 9. a4 b6 10. Qe2 Qc7 11. Re1 Bb7 12. e5 Rac8 13. h4 h5 14. Nf1 Nf5 15. Bf4 d4 16. c4 Nb4 17. Rec1 a6 18. N1d2 Nc6 19. Ne4 Na5 20. Re1 b5 21. Nd6 Nxd6 22. exd6 Qb6 23. axb5 axb5 24. Ne5 Bxg2 25. Kxg2 bxc4 26. dxc4 Rcd8 27. Kg1 Nc6 28. Nxc6 Qxc6 29. Ra7 Rfe8 30. Rc7 Qb6 31. b4 Qxb4 32. d7 Re7 33. Bg5 f6 34. Rc8 Qb6 35. Bd2 Rexd7 36. Rxd8+ Rxd8 37. Ra1 Qc6 38. Qd3 Kf7 39. Ra7+ Rd7 40. Qa3 Bf8 41. Ra8 Rb7 42. Qa2 Qb6 43. Qa4 Qb1+ 44. Kh2 Re7 45. Qc6 Qb7 46. Qa4 e5 47. Qa5 Kg7 48. Bh6+ Kxh6 49. Rxf8 Rf7 50. Qxc5 Qe7 51. Rh8+ Kg7 52. Qc8 Rf8 53. Rxf8 Qxf8 54. Qb7+ Qf7 55. Qb5 d3 56. c5 Qd5 57. Qb1 d2 58. Qd1 Qd4 59. Kg1 Qc3 60. Kf1 Qd3+ 61. Kg1 Kf8 62. Kg2 Ke7 63. Kg1 Qc3 64. Kf1 Qc1 65. Ke2 Qxd1+ 66. Kxd1 Kd7 67. Kxd2 Kc6 68. Ke2 Kxc5 69. Ke3 f5 70. Kf3 Kd4 71. Ke2 Ke4 0-1

[Event "Muensterland Verbandsliga 0506"]
[Site "Germany"]
[Date "2005.12.03"]
[Round "5.7"]
[White "Stepa, Rainer"]
[Black "Van Opheusden, Bas"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1963"]
[BlackElo "2190"]
[PlyCount "72"]
[EventDate "2005.08.27"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]
[WhiteTeam "Westbevern"]
[BlackTeam "Gronau"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 c5 2. e3 d5 3. d4 e6 4. c3 Nf6 5. Bd3 Nc6 6. Nbd2 Bd6 7. 0-0 0-0 8. Qe2 e5 9. dxe5 Nxe5 10. Nxe5 Bxe5 11. h3 Re8 12. Nf3 Bc7 13. c4 d4 14. Qc2 b6 15. exd4 cxd4 16. Rd1 Bb7 17. Nd2 h6 18. b3 g5 19. Nf1 Nh5 20. Bh7+ Kh8 21. Bb2 Be5 22. Re1 Nf4 23. Rad1 Qf6 24. Rxe5 Rxe5 25. Bxd4 Ne2+ 26. Qxe2 Rxe2 27. Bxf6+ Kxh7 28. Rd2 Rxd2 29. Nxd2 Kg6 30. Bb2 Rd8 31. Bc1 Rd3 32. a4 Rc3 33. Ba3 Rc2 34. Nf1 Ra2 35. Bc1 Ra1 36. Be3 Be4 0-1

[Event "Muensterland Verbandsliga 0506"]
[Site "Germany"]
[Date "2005.11.12"]
[Round "4.7"]
[White "Van Opheusden, Bas"]
[Black "Korth, Daniel"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "2190"]
[BlackElo "2023"]
[PlyCount "107"]
[EventDate "2005.08.27"]
[EventType "team"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]
[WhiteTeam "Gronau"]
[BlackTeam "Muenster II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 Nf6 2. e5 Nd5 3. c4 Nb6 4. c5 Nd5 5. d4 c6 6. Nf3 d6 7. cxd6 exd6 8. Bc4 dxe5 9. Nxe5 Be6 10. Nc3 Bb4 11. Qh5 Nd7 12. 0-0 N5f6 13. Qe2 Bxc4 14. Qxc4 Qe7 15. Bg5 Bxc3 16. bxc3 0-0 17. Nxd7 Qxd7 18. Bxf6 gxf6 19. Rab1 Rae8 20. Rfd1 Re4 21. Rd3 Rfe8 22. Rg3+ Kh8 23. h3 Rg8 24. Qd3 Ree8 25. Qf3 Qe7 26. Kh2 Rg6 27. c4 Reg8 28. d5 cxd5 29. cxd5 b6 30. Rc1 Rxg3 31. fxg3 Rd8 32. Re1 Qd6 33. Rf1 Qe5 34. Qxf6+ Qxf6 35. Rxf6 Rxd5 36. Rxf7 Ra5 37. Rf2 Kg7 38. g4 Ra3 39. h4 Kg6 40. g3 b5 41. h5+ Kg7 42. g5 b4 43. Kh3 Ra5 44. Kg4 Rb5 45. Rf5 Rb7 46. h6+ Kg8 47. Rc5 Rb8 48. Kh5 b3 49. axb3 Rxb3 50. Rc8+ Kf7 51. Rc7+ Kg8 52. Rg7+ Kf8 53. Rxa7 Rxg3 54. Rxh7 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2005.10.29"]
[Round "9"]
[White "Weeks, Manuel William"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2268"]
[BlackElo "2190"]
[PlyCount "43"]
[EventDate "2005.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. Bc4 e6 6. 0-0 a6 7. a4 Qa5 8. Ra3 Nc6 9. f5 Nge7 10. fxe6 fxe6 11. Ng5 Nd8 12. d3 h6 13. Nh3 Nec6 14. Be3 Bd7 15. Nf4 0-0 16. Nxg6 Rxf1+ 17. Qxf1 Kh7 18. Nf8+ Bxf8 19. Qxf8 h5 20. Bh6 Qxc3 21. Rxc3 a5 22. Qg7# 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2005.10.28"]
[Round "8"]
[White "Van Opheusden, Bas"]
[Black "Vogel, Jaap"]
[Result "1/2-1/2"]
[ECO "C16"]
[WhiteElo "2190"]
[BlackElo "2261"]
[PlyCount "87"]
[EventDate "2005.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Bb5+ c6 7. Ba4 a5 8. a3 Ba6 9. Nce2 Qc8 10. Ng3 Bc4 11. c3 Qa6 12. Nh3 Bd3 13. Nf4 Ne7 14. Nxd3 Qxd3 15. Bd1 Nd7 16. Be2 Qc2 17. Bd1 Qd3 18. Be2 Qc2 19. 0-0 g6 20. f4 Nf5 21. Nxf5 gxf5 22. Qf3 c5 23. c4 cxd4 24. cxd5 Rc8 25. Ba6 Rc5 26. d6 Qe4 27. Bd2 Qxf3 28. Rxf3 f6 29. Rd3 fxe5 30. fxe5 Bg7 31. Rxd4 Bxe5 32. Bc3 Kf7 33. Rd3 Rd8 34. Re1 Bxc3 35. bxc3 Nf6 36. c4 Rc6 37. Red1 Ne4 38. Bb7 Rxc4 39. Bxe4 Rxe4 40. Rb1 Rb8 41. d7 Ke7 42. Rxb6 Rd8 43. Rb7 h5 44. Kf2 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2005.10.27"]
[Round "7"]
[White "De Jong, Migchiel"]
[Black "Van Opheusden, Bas"]
[Result "1/2-1/2"]
[ECO "A08"]
[WhiteElo "2277"]
[BlackElo "2190"]
[PlyCount "109"]
[EventDate "2005.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 d5 3. Bg2 Nc6 4. 0-0 e5 5. d3 f6 6. c4 Nge7 7. Nc3 Be6 8. b3 Qd7 9. e3 Rd8 10. Bb2 d4 11. exd4 cxd4 12. Ne4 Ng6 13. a3 a5 14. Re1 Be7 15. h4 Bg4 16. Qc2 0-0 17. Nh2 Bh3 18. Bh1 f5 19. Nd2 Bd6 20. h5 Nge7 21. Qd1 Qe8 22. Bg2 Bxg2 23. Kxg2 Kh8 24. Qe2 Ng8 25. Rh1 Nf6 26. h6 g5 27. f3 Qg6 28. Nhf1 g4 29. Re1 gxf3+ 30. Nxf3 Bc7 31. Bc1 e4 32. Nh4 Qh5 33. Qxh5 Nxh5 34. dxe4 fxe4 35. Rxe4 Rxf1 36. Rxf1 Nxg3 37. Rf7 Nxe4 38. Rxc7 Ne5 39. Nf3 Nd3 40. Bd2 Rg8+ 41. Rg7 Rxg7+ 42. hxg7+ Kxg7 43. Bxa5 Nf4+ 44. Kf1 d3 45. Nd2 Ng3+ 46. Kf2 Nge2 47. Ke3 Kf6 48. Bc7 Kf5 49. a4 h5 50. Nf3 Ne6 51. Bd6 N6d4 52. Nxd4+ Nxd4 53. b4 Ke6 54. Kxd3 Nc6 55. Bg3 1/2-1/2

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2005.10.26"]
[Round "6"]
[White "Van Opheusden, Bas"]
[Black "Hendriks, Peter"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2190"]
[BlackElo "2121"]
[PlyCount "83"]
[EventDate "2005.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Nc6 6. Bd2 a6 7. Bc4 Qh5 8. 0-0 Bg4 9. Be2 0-0-0 10. h3 Bxf3 11. Bxf3 Qf5 12. Bxc6 bxc6 13. Qe2 Rxd4 14. Qxa6+ Kd7 15. Be3 Rd6 16. Na4 e6 17. Nc5+ Ke7 18. Nb7 Rd5 19. Qxc6 Nd7 20. Qxc7 Kf6 21. a4 Nc5 22. Nxc5 Bxc5 23. c4 Bd6 24. Qc6 Rd3 25. a5 Qe5 26. g3 g5 27. Rad1 Rxe3 28. fxe3+ Ke7 29. Rf3 f5 30. a6 h5 31. a7 g4 32. a8Q Rxa8 33. Qxa8 gxf3 34. Qxf3 h4 35. gxh4 Qxb2 36. Qg2 Qe5 37. Qg5+ Kf7 38. Rd2 Be7 39. Rd7 Qa1+ 40. Kg2 Qa2+ 41. Kg3 f4+ 42. exf4 1-0

[Event "Hoogeveen Essent op"]
[Site "Hoogeveen"]
[Date "2005.10.25"]
[Round "5"]
[White "Grooten, Herman"]
[Black "Van Opheusden, Bas"]
[Result "1-0"]
[ECO "A79"]
[WhiteElo "2350"]
[BlackElo "2190"]
[PlyCount "67"]
[EventDate "2005.10.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2006"]
[Source "ChessBase"]
[SourceDate "2005.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2005.11.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. Nf3 g6 7. Nd2 Bg7 8. e4 0-0 9. Be2 Re8 10. 0-0 Na6 11. f3 Nc7 12. Kh1 Nd7 13. Nc4 Ne5 14. Ne3 f5 15. f4 Nf7 16. exf5 gxf5 17. Bd3 Nh6 18. Qh5 Qf6 19. Bd2 Qg6 20. Qf3 Ng4 21. Nxg4 Qxg4 22. Qxg4 fxg4 23. f5 Be5 24. Bh6 Re7 25. Rae1 Ne8 26. Ne4 Rf7 27. Nxd6 Nxd6 28. Rxe5 c4 29. Bc2 b5 30. f6 Bd7 31. Rg5+ Kh8 32. Bg7+ Kg8 33. Rf4 Re8 34. h4 1-0

