[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "3"]
[White "Bosch, Peter M"]
[Black "Douma, Sander"]
[Result "0-1"]
[ECO "B12"]
[PlyCount "44"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. c4 dxc4 5. Bxc4 Nd7 6. Qb3 e6 7. Qxb7 Ne7 8. Qb3 Rb8 9. Qd1 c5 10. dxc5 Nxe5 11. Qxd8+ Kxd8 12. Bf4 N7g6 13. Bxe5 Nxe5 14. Na3 Bxc5 15. Be2 Ke7 16. Nb5 Bd3 17. a4 a6 18. f4 Bxe2 19. fxe5 Bd3 20. Nc3 Rxb2 21. Nce2 Rc8 22. Nc1 Bb4+ 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "9"]
[White "Douma, Sander"]
[Black "Brouwer, Erik"]
[Result "1-0"]
[ECO "D35"]
[PlyCount "129"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 c6 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 Be7 7. e3 Bf5 8. Bd3 Bxd3 9. Qxd3 0-0 10. Bxf6 Bxf6 11. 0-0 Nd7 12. b4 b5 13. a4 a6 14. a5 Be7 15. Na2 Nf6 16. Rac1 Rc8 17. Ne5 Bd6 18. h3 Qe8 19. f4 Ne4 20. Nf3 Qe7 21. Qb3 Rc7 22. Rc2 Rfc8 23. Rfc1 h6 24. Ne5 Qe8 25. Nc3 Nxc3 26. Rxc3 f6 27. Ng4 Qf8 28. Rxc6 Qf7 29. Rxc7 Rxc7 30. Rxc7 Bxc7 31. Qc3 h5 32. Nf2 Qe7 33. Qc5 Qxe3 34. Qxd5+ Kh8 35. Qxh5+ Kg8 36. Qd5+ Kh8 37. Qa8+ Kh7 38. Qe4+ Qxe4 39. Nxe4 Bxf4 40. Kf2 Kg8 41. Nc5 Kf7 42. Nxa6 Ke7 43. Nc5 Bb8 44. Ke3 Kd6 45. h4 Kd5 46. h5 Kc4 47. Na6 Ba7 48. Ke4 Bxd4 49. Kf5 Be3 50. Kg6 Bh6 51. Nc5 Kxb4 52. a6 Kxc5 53. a7 b4 54. a8Q Kc4 55. Qa1 Kb3 56. Qb1+ Kc3 57. Kf5 b3 58. Ke4 b2 59. g4 Bg5 60. Kf3 Bh6 61. Ke2 Bc1 62. Kd1 Kb3 63. Ke2 Bg5 64. Kd3 Bc1 65. Qc2+ 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "2"]
[White "Douma, Sander"]
[Black "De Boer, Gert Jan"]
[Result "0-1"]
[ECO "E45"]
[PlyCount "44"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. a3 Bxc3+ 7. Nxc3 d5 8. b3 0-0 9. a4 Nc6 10. Ba3 Re8 11. b4 Bxc4 12. Bxc4 dxc4 13. Qe2 e5 14. Qxc4 exd4 15. Qxc6 Re6 16. Qc4 dxc3 17. Qxc3 Ne4 18. Qc2 Nxf2 19. Kxf2 Qf6+ 20. Ke2 Rae8 21. Qd3 Qg5 22. Rhe1 Qxg2+ 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "7"]
[White "Douma, Sander"]
[Black "Janssen, Han"]
[Result "0-1"]
[ECO "E70"]
[PlyCount "74"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 0-0 6. Bg5 h6 7. Bh4 d6 8. Nf3 a6 9. Bd3 b5 10. 0-0 bxc4 11. Bxc4 Bg4 12. Re1 Nbd7 13. h3 Bxf3 14. gxf3 Nh5 15. Qd2 g5 16. Bg3 Be5 17. Ne2 Bxg3 18. fxg3 Ne5 19. Qc3 f5 20. f4 Nxc4 21. Qxc4 Rb8 22. fxg5 hxg5 23. exf5 Rxf5 24. g4 Rf4 25. Nxf4 Nxf4 26. b3 Qf8 27. Qf1 Qf6 28. Rad1 Qc3 29. Rxe7 Nxh3+ 30. Kh1 Rf8 31. Re8 Rxe8 32. Qf5 Qg7 33. Kh2 Nf4 34. Rd2 Qh6+ 35. Kg3 Qh4+ 36. Kf3 Qh3+ 37. Kf2 Qe3+ 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "5"]
[White "Douma, Sander"]
[Black "Licher, Ferdy"]
[Result "1-0"]
[ECO "A58"]
[PlyCount "69"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 d6 6. Nc3 g6 7. Nf3 Bg7 8. e4 0-0 9. Nd2 Nbd7 10. bxa6 Bxa6 11. Bxa6 Rxa6 12. 0-0 Nb6 13. Rb1 Nfd7 14. Qc2 Qc7 15. b3 Bxc3 16. Qxc3 Rxa2 17. Nf3 f6 18. Bh6 Rfa8 19. Ng5 Qb7 20. f4 R8a3 21. Qh3 Nf8 22. Bxf8 Kxf8 23. Qxh7 Ke8 24. Qxg6+ Kd7 25. Qf5+ Kc7 26. Ne6+ Kb8 27. Nd8 Qc7 28. Nc6+ Kb7 29. Rfe1 Rd2 30. Ra1 Raa2 31. Rxa2 Rxa2 32. h4 Qc8 33. Qxc8+ Nxc8 34. h5 e6 35. Nd8+ 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "4"]
[White "Douma, Sander"]
[Black "Van Mil, Johan"]
[Result "0-1"]
[ECO "D86"]
[PlyCount "78"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 b6 9. 0-0 Bb7 10. Qc2 c5 11. Rd1 cxd4 12. Nxd4 Qc7 13. Bd3 Rc8 14. Nb5 Qc6 15. Qe2 a6 16. Nd4 Qxc3 17. Bb2 Qb4 18. a3 Qa4 19. Bc2 Qe8 20. Bb3 e6 21. Nxe6 fxe6 22. Bxg7 Kxg7 23. Rd6 Rc6 24. Rad1 Rxd6 25. Rxd6 Bc8 26. Qb2+ e5 27. Bd5 Ra7 28. Qxb6 Qe7 29. Rd8 Rc7 30. Rg8+ Kh6 31. h3 Rc1+ 32. Kh2 Nd7 33. Qb2 Qg5 34. g3 Nf6 35. h4 Ng4+ 36. Kg2 Ne3+ 37. fxe3 Qxe3 38. Rf8 Rg1+ 39. Kh2 Qxg3# 0-1

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "1"]
[White "Hauwert, Nicolaas"]
[Black "Douma, Sander"]
[Result "1/2-1/2"]
[ECO "D26"]
[PlyCount "76"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 dxc4 6. Bxc4 e6 7. Nf3 Nc6 8. 0-0 Be7 9. Re1 0-0 10. Bf4 a6 11. Rc1 Nb4 12. Be5 b5 13. Bb3 Bb7 14. a3 Nbd5 15. Nxd5 Nxd5 16. Bc2 Rc8 17. Qd3 g6 18. Qd2 Re8 19. h4 Nb6 20. h5 Bxf3 21. hxg6 fxg6 22. Bxg6 Bg5 23. Qd3 Qe7 24. Bxe8 Bxc1 25. Qxf3 Qxe8 26. Re4 Qf7 27. Rg4+ Kf8 28. Qe2 Bh6 29. Bd6+ Ke8 30. Re4 Rc1+ 31. Kh2 Kd7 32. Bc5 Nd5 33. g3 Nf6 34. Rh4 Ng4+ 35. Kg2 Nxf2 36. Qxf2 Qg6 37. Qf3 Qc2+ 38. Kh3 Qf5+ 1/2-1/2

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "8"]
[White "Stehouwer, Coen"]
[Black "Douma, Sander"]
[Result "1-0"]
[ECO "D26"]
[PlyCount "43"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 dxc4 6. Bxc4 e6 7. Nf3 Nc6 8. 0-0 Be7 9. Qe2 Nxd4 10. Nxd4 Qxd4 11. Nb5 Qd8 12. Bf4 0-0 13. Nc7 Bd7 14. Nxa8 Qxa8 15. Rfd1 Bc6 16. f3 Nd5 17. Bxd5 Bc5+ 18. Be3 Bxe3+ 19. Qxe3 Bxd5 20. Rac1 Bxa2 21. b3 Rc8 22. Rc3 1-0

[Event "NED U20-ch"]
[Site "Rotterdam"]
[Date "1977.??.??"]
[Round "6"]
[White "Van der Poel, Henk"]
[Black "Douma, Sander"]
[Result "0-1"]
[ECO "B10"]
[PlyCount "70"]
[EventDate "1977.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2004"]
[Source "ChessBase"]
[SourceDate "2003.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2003.11.25"]
[SourceQuality "1"]

1. e4 c6 2. c4 d5 3. cxd5 cxd5 4. exd5 a6 5. Nc3 Nf6 6. d4 Nxd5 7. Bd3 Nc6 8. Nf3 Bg4 9. h3 Bh5 10. 0-0 e6 11. Be3 Be7 12. Rc1 Nxc3 13. bxc3 0-0 14. Be4 Bg6 15. Bxg6 hxg6 16. c4 Qa5 17. Qb3 Rfc8 18. Rfd1 b5 19. c5 Bf6 20. d5 exd5 21. Rxd5 Qb4 22. Qd3 Qb2 23. Qd2 Qxd2 24. Bxd2 b4 25. g4 a5 26. g5 Bb2 27. Rb1 Ba3 28. Bf4 Ne7 29. Re5 Ra7 30. Nd2 f6 31. gxf6 gxf6 32. Re6 Kf7 33. Ree1 Nd5 34. Nc4 Rxc5 35. Nxa3 Nxf4 0-1

