[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.13"]
[Round "9"]
[White "De Vos, Bart"]
[Black "Van der Raaf, Erik"]
[Result "1-0"]
[ECO "C00"]
[PlyCount "58"]
[EventDate "1974.04.05"]
[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. Qe2 Be7 3. g3 d5 4. Bg2 Nf6 5. e5 Nfd7 6. d4 c5 7. c3 Nc6 8. Qg4 Kf8 9. Ne2 cxd4 10. cxd4 Bb4+ 11. Bd2 f5 12. Qf4 g5 13. Qe3 Nb6 14. a3 Nc4 15. Bxb4+ Nxb4 16. Qb3 Na6 17. Nd2 Na5 18. Qe3 Rg8 19. h4 h6 20. hxg5 Qxg5 21. Rxh6 Qxe3 22. fxe3 Nc6 23. Kf2 Nd8 24. Rah1 Nf7 25. Rf6 Ke8 26. Nf3 Bd7 27. Rc1 b6 28. Nf4 Ke7 29. Bf1 Ng5 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.12"]
[Round "8"]
[White "De Vos, Bart"]
[Black "Wakker, Peter"]
[Result "0-1"]
[ECO "D40"]
[PlyCount "107"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c5 3. e3 e6 4. d4 d5 5. Nf3 Nc6 6. Be2 dxc4 7. Bxc4 Be7 8. 0-0 cxd4 9. exd4 0-0 10. Be3 Nb4 11. Ne2 a6 12. Ng3 b5 13. Bb3 Bb7 14. a3 Nbd5 15. Rc1 Qb6 16. Qe2 Rac8 17. Ne5 Bd6 18. Bxd5 Bxd5 19. Nh5 Nxh5 20. Qxh5 Qb7 21. Qg4 f6 22. Nf3 Rxc1 23. Rxc1 Rc8 24. Rxc8+ Qxc8 25. Ne1 Qc4 26. Qd1 a5 27. Nd3 Qb3 28. Qxb3 Bxb3 29. Nc5 Bd5 30. b4 a4 31. f3 Kf7 32. g3 Bxf3 33. Kf2 Bd5 34. Bd2 Kg6 35. Ke3 Kf5 36. Nd3 g5 37. Bc3 h5 38. Bd2 Kg6 39. Bc3 Kf7 40. Bd2 Kg7 41. Bc3 Kh7 42. Bd2 Kh6 43. Bc3 Kg6 44. Be1 Kf7 45. Bd2 Ke7 46. Bc3 Kf8 47. Be1 Kg8 48. Bd2 Kh8 49. Be1 Kg8 50. Bd2 Kf8 51. Be1 Bc7 52. Bd2 Kf7 53. Bc3 Kg6 54. Nf2 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.11"]
[Round "7"]
[White "De Vos, Bart"]
[Black "Croese, Cornelis"]
[Result "1/2-1/2"]
[ECO "A34"]
[PlyCount "60"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nf6 3. Nf3 e6 4. e4 d5 5. cxd5 exd5 6. exd5 Nxd5 7. Bb5+ Nc6 8. Ne5 Nxc3 9. Bxc6+ bxc6 10. dxc3 Qxd1+ 11. Kxd1 Bd6 12. Nc4 Bc7 13. Be3 Be6 14. Nd2 0-0 15. Bxc5 Rfe8 16. h3 Bd5 17. f3 Bg3 18. c4 Be6 19. Ne4 Be5 20. Kc2 Bxc4 21. Nd6 Bxd6 22. Bxd6 Re2+ 23. Kc3 Bd5 24. Rhg1 Rae8 25. Bc5 a6 26. a3 a5 27. Rad1 a4 28. Rd2 h5 29. h4 f6 30. Rgd1 Kf7 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.10"]
[Round "6"]
[White "Van der Wees, Aad Jan"]
[Black "De Vos, Bart"]
[Result "0-1"]
[ECO "A43"]
[PlyCount "64"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 c5 3. d5 d6 4. e4 a6 5. a4 g6 6. f4 Bg7 7. Nf3 0-0 8. Bd3 e6 9. 0-0 exd5 10. exd5 b6 11. f5 c4 12. Bxc4 Bxf5 13. Bd3 Bxd3 14. Qxd3 Nbd7 15. Ne4 Nxe4 16. Qxe4 Re8 17. Qf4 Nf6 18. Qc4 Rc8 19. Qxa6 Rxc2 20. Qd3 Qc7 21. Be3 Nxd5 22. Qxd5 Rxe3 23. Qa8+ Qc8 24. Qxc8+ Rxc8 25. Rad1 Rd8 26. Rd5 Bxb2 27. Rfd1 Ba3 28. a5 Bc5 29. Kf1 Rb8 30. Nd2 bxa5 31. Nc4 Re6 32. Nxa5 Rf6+ 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.09"]
[Round "5"]
[White "De Vos, Bart"]
[Black "Nijmeijer, Henk"]
[Result "0-1"]
[ECO "E68"]
[PlyCount "82"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. d4 d6 6. Nf3 c6 7. 0-0 Nbd7 8. Ne1 e5 9. d5 c5 10. e4 a6 11. Nd3 Ne8 12. f4 b5 13. cxb5 axb5 14. Nxb5 Ba6 15. Nc3 Qb6 16. Kh1 Nc7 17. Rf3 Nb5 18. Nxb5 Bxb5 19. f5 Ra4 20. Nf2 Qa6 21. Ra3 Rxa3 22. bxa3 Be2 23. Qd2 Rb8 24. fxg6 hxg6 25. Qc2 Bf3 26. Bb2 Qe2 27. Qxe2 Bxe2 28. Bc3 Ra8 29. Re1 Bc4 30. Bb2 Bxa2 31. Re2 Bb3 32. g4 Nb6 33. g5 Nc4 34. Bf1 Nxb2 35. Rxb2 Rxa3 36. Ng4 Kf8 37. Nf6 Bxf6 38. gxf6 Kg8 39. h4 Kh7 40. h5 g5 41. Kg1 Kh6 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.08"]
[Round "4"]
[White "Van der Sterren, Paul"]
[Black "De Vos, Bart"]
[Result "1-0"]
[ECO "B34"]
[PlyCount "41"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. Nxc6 bxc6 8. e5 Ng8 9. Qf3 f5 10. Bf4 Bb7 11. h4 Qc7 12. Qg3 0-0-0 13. 0-0-0 Bh6 14. Bg5 Rf8 15. Rhe1 e6 16. Bxh6 Nxh6 17. Qe3 Nf7 18. Qxa7 Nxe5 19. Ba6 Bxa6 20. Qa8+ Qb8 21. Qxa6+ 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.07"]
[Round "3"]
[White "Van der Hauw, Henk"]
[Black "De Vos, Bart"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "64"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. e4 d6 2. d4 g6 3. Nc3 Bg7 4. Nf3 Nf6 5. Be2 c6 6. Bg5 b5 7. a3 a6 8. 0-0 0-0 9. h3 Qc7 10. Qd2 e5 11. dxe5 dxe5 12. Rad1 Ra7 13. Be3 c5 14. Nd5 Nxd5 15. Qxd5 Nd7 16. c4 bxc4 17. Bxc4 Qa5 18. b4 Qa4 19. bxc5 Nf6 20. Qd3 Rd7 21. Qb3 Qxb3 22. Bxb3 Nxe4 23. c6 Rxd1 24. Rxd1 Bf6 25. Bb6 Nc3 26. Re1 Re8 27. Nd2 Bf5 28. Nc4 Rc8 29. Nxe5 Bxe5 30. Rxe5 Rxc6 31. Bd4 Be6 32. Bxe6 fxe6 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.06"]
[Round "2"]
[White "De Vos, Bart"]
[Black "Van Dieren, Arie"]
[Result "1/2-1/2"]
[ECO "A21"]
[PlyCount "66"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 f5 3. d3 c6 4. f4 d6 5. Nf3 Qc7 6. e4 Nf6 7. Be2 Be7 8. fxe5 dxe5 9. exf5 Bxf5 10. d4 Nbd7 11. 0-0 Bg6 12. Kh1 0-0 13. Nxe5 Nxe5 14. dxe5 Qxe5 15. Bf4 Qe6 16. Qb3 Qc8 17. Rae1 Kh8 18. Bf3 Bc5 19. Ne4 Nxe4 20. Bxe4 Bxe4 21. Rxe4 Qf5 22. Qf3 Qf6 23. Bc1 Qxf3 24. Rxf3 Rxf3 25. gxf3 Kg8 26. Bg5 h6 27. Be7 Bb6 28. Bd6 c5 29. Re7 Rf8 30. Kg2 Rf7 31. Rxf7 Kxf7 32. Bg3 Bd8 33. Kf2 Be7 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1974.04.05"]
[Round "1"]
[White "Akkerman, Erwin"]
[Black "De Vos, Bart"]
[Result "0-1"]
[ECO "E94"]
[PlyCount "68"]
[EventDate "1974.04.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. 0-0 e5 8. d5 Nc5 9. Bg5 a5 10. a3 a4 11. Nd2 h6 12. Bxf6 Bxf6 13. b4 axb3 14. Nxb3 b6 15. Nxc5 bxc5 16. Qc2 Bg7 17. a4 f5 18. Bd3 f4 19. f3 g5 20. Rab1 Kh8 21. Kh1 h5 22. Rb5 g4 23. Rg1 Qh4 24. fxg4 hxg4 25. g3 fxg3 26. Rxg3 Bh6 27. Ne2 Bd7 28. Rb7 Rf2 29. Rg2 Rxg2 30. Kxg2 Qh3+ 31. Kf2 Rf8+ 32. Nf4 Rxf4+ 33. Ke1 g3 34. Rb2 Rf2 0-1

