[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.06"]
[Round "11"]
[White "Sibe, Jan"]
[Black "Bleiman, Yaacov"]
[Result "0-1"]
[ECO "B06"]
[PlyCount "58"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 c5 4. Be3 Qa5 5. Qd2 Nf6 6. Be2 cxd4 7. Bxd4 Nc6 8. Be3 d6 9. h3 Qb4 10. Bd3 Ng4 11. Nge2 Nxe3 12. fxe3 0-0 13. 0-0 Bd7 14. Nf4 e6 15. Qf2 Qxb2 16. Nce2 Qb6 17. Rab1 Qc7 18. g4 Ne5 19. Ng3 b6 20. g5 Qc5 21. Be2 f6 22. h4 fxg5 23. hxg5 Nf7 24. Qh2 Qxe3+ 25. Kh1 Nxg5 26. Qh4 Nxe4 27. Ngh5 gxh5 28. Nxh5 Qxe2 29. Rg1 Nf2+ 0-1

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.05"]
[Round "10"]
[White "Huebner, Robert"]
[Black "Sibe, Jan"]
[Result "1-0"]
[ECO "B35"]
[PlyCount "81"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Nc3 Nf6 7. Bc4 0-0 8. Bb3 Ng4 9. Qxg4 Nxd4 10. Qd1 Nxb3 11. axb3 b6 12. Bd4 e5 13. Be3 Bb7 14. Qd2 f5 15. Bg5 Bf6 16. Bh6 Bg7 17. Bxg7 Kxg7 18. 0-0-0 Bc6 19. f3 Rc8 20. Rhe1 b5 21. exf5 Rxf5 22. Ne4 d5 23. Ng3 Rf7 24. Rxe5 Qc7 25. Qd4 Kg8 26. h4 b4 27. Rd2 Rcf8 28. Ne2 a5 29. h5 a4 30. hxg6 hxg6 31. Re6 Rg7 32. Qc5 Rc8 33. Nd4 Rh7 34. Rxg6+ Kf7 35. Qd6 Qxd6 36. Rxd6 Rh1+ 37. Rd1 Rxd1+ 38. Kxd1 a3 39. bxa3 bxa3 40. Nxc6 a2 41. Ne5+ 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.04"]
[Round "8"]
[White "Kolbak, Jens"]
[Black "Sibe, Jan"]
[Result "1-0"]
[ECO "E05"]
[PlyCount "127"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 Be7 5. 0-0 0-0 6. c4 dxc4 7. Nbd2 c6 8. Nxc4 Nbd7 9. Qc2 Nb6 10. Nce5 Bd7 11. Rb1 Ne8 12. Rd1 Nd6 13. h4 Be8 14. Nd3 Nd5 15. Bf4 Nxf4 16. Nxf4 Qc8 17. Bh3 g6 18. Rbc1 Qb8 19. Kg2 Nf5 20. h5 Bd6 21. e3 Bd7 22. Nd3 Qd8 23. e4 Ng7 24. h6 Ne8 25. Nc5 Bc8 26. Qb3 Qe7 27. Nd3 Bb8 28. Re1 Nf6 29. Nfe5 Rd8 30. Qc3 Qd6 31. Nf3 Qf8 32. Qd2 Kh8 33. Qg5 Ng8 34. Qh4 f6 35. Nc5 Re8 36. d5 exd5 37. Bxc8 Rxc8 38. exd5 Bd6 39. Nxb7 cxd5 40. Nxd6 Qxd6 41. Rcd1 Rd8 42. Nd4 Re8 43. b3 Qb4 44. Rxe8 Rxe8 45. Qf4 Re4 46. Qc7 Qe7 47. Qc6 Qe5 48. Nf3 Qe6 49. Qb7 Nxh6 50. Rxd5 Nf7 51. Rd7 Kg7 52. Rxf7+ Qxf7 53. Qxe4 Qd7 54. a4 g5 55. Nd4 h5 56. Nf5+ Kf7 57. Ne3 Kg7 58. Qd5 Qc7 59. a5 h4 60. a6 h3+ 61. Kxh3 Qc8+ 62. g4 Qxa6 63. Nf5+ Kh8 64. Qd8+ 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.04"]
[Round "9"]
[White "Sibe, Jan"]
[Black "Woodcock, Christopher Francis"]
[Result "1/2-1/2"]
[ECO "B74"]
[PlyCount "82"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 g6 7. Be3 Bg7 8. 0-0 0-0 9. Nb3 Be6 10. f4 Na5 11. Nxa5 Qxa5 12. Bf3 Rac8 13. Rf2 Qb4 14. Nd5 Bxd5 15. c3 Qc4 16. exd5 Ne4 17. Rc2 Nc5 18. b3 Qd3 19. Bxc5 Qxd1+ 20. Rxd1 Rxc5 21. c4 b5 22. Rdc1 Rfc8 23. Kf2 b4 24. Re1 Kf8 25. Ke3 a5 26. Kd3 a4 27. Rb1 Ra8 28. Rf2 axb3 29. axb3 Ra3 30. Bd1 Rca5 31. Bc2 Ra2 32. Rd2 Bc3 33. g4 Ra1 34. Rg2 Rxb1 35. Bxb1 Ra3 36. Ba2 Kg7 37. g5 h6 38. h4 hxg5 39. hxg5 f6 40. Ke4 fxg5 41. fxg5 Kf7 1/2-1/2

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.02"]
[Round "7"]
[White "Sibe, Jan"]
[Black "Verstraeten, Roland"]
[Result "1/2-1/2"]
[ECO "B43"]
[PlyCount "91"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. 0-0 d6 8. Nb3 Be7 9. f4 0-0 10. Be3 Nbd7 11. Qf3 Nb6 12. Rae1 Rd8 13. Qh3 e5 14. Qf3 Ng4 15. Bxb6 Qxb6+ 16. Kh1 Rf8 17. Nd5 Qd8 18. f5 Nf6 19. Nxe7+ Qxe7 20. g4 Ne8 21. Qg3 b5 22. c4 Bd7 23. g5 f6 24. h4 Rc8 25. Rc1 Kh8 26. Qe3 Nc7 27. Rg1 Bc6 28. Na5 Ba8 29. Qe2 bxc4 30. Nxc4 d5 31. Nb6 dxe4 32. Bxe4 Bxe4+ 33. Qxe4 Rcd8 34. Qc6 Nb5 35. Nd5 Qf7 36. gxf6 gxf6 37. Ne3 Qh5 38. Rg4 Nd4 39. Qg2 Nxf5 40. Nxf5 Qxf5 41. Rg1 Qh5 42. Qb7 Rf7 43. Qxa6 Qf5 44. Qa3 Rdf8 45. Qg3 Qc8 46. Rg2 1/2-1/2

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.01"]
[Round "6"]
[White "Noorda, Sybold J"]
[Black "Sibe, Jan"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "27"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 d5 4. exd5 Qxd5 5. cxd4 Nc6 6. Nf3 Bg4 7. Nc3 Qe6+ 8. Be3 Qd6 9. d5 Ne5 10. Nxe5 Bxd1 11. Bb5+ Kd8 12. Nxf7+ Kc7 13. Nxd6 exd6 14. Rxd1 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.31"]
[Round "5"]
[White "Sibe, Jan"]
[Black "Algera, Simon"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "99"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 Nd5 7. N1f3 h6 8. Ne4 N7f6 9. Nxf6+ exf6 10. 0-0 Be7 11. Bb3 0-0 12. c4 Nb6 13. Qd3 f5 14. Bd2 Be6 15. Ba5 c5 16. d5 Bf6 17. Rad1 Bd7 18. Qb1 Qe7 19. Rfe1 Qd6 20. Bd2 Na4 21. Bc1 Kh7 22. Bxa4 Bxa4 23. Qxf5+ Kg8 24. b3 Bd7 25. Qf4 Qxf4 26. Bxf4 Rfe8 27. Bd6 b6 28. Ne5 Bxe5 29. Bxe5 f6 30. Bg3 Rxe1+ 31. Rxe1 Re8 32. Rxe8+ Bxe8 33. Bb8 a6 34. Ba7 b5 35. Bxc5 bxc4 36. bxc4 Kf7 37. Kf1 g6 38. Ke2 f5 39. f4 Kf6 40. Bf8 h5 41. h4 Kf7 42. Bb4 Ba4 43. Kd3 Ke8 44. Kd4 Kd8 45. Kc5 Kc7 46. Ba5+ Kb7 47. Kd6 Kc8 48. c5 Bb5 49. c6 Bc4 50. a3 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.30"]
[Round "3"]
[White "De Haseth, Pieters Lourens"]
[Black "Sibe, Jan"]
[Result "0-1"]
[ECO "B34"]
[PlyCount "78"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Be2 0-0 8. 0-0 d5 9. Nxc6 bxc6 10. e5 Nd7 11. f4 Qc7 12. Na4 Rd8 13. c3 e6 14. Nc5 Bf8 15. b4 Nxc5 16. Bxc5 Bxc5+ 17. bxc5 Qa5 18. Qd4 Ba6 19. Bxa6 Qxa6 20. Rfb1 Rab8 21. a4 Qe2 22. Rb4 a5 23. Rb6 Rxb6 24. cxb6 Qb2 25. Qd1 Qxb6+ 26. Kh1 Rb8 27. h3 Qf2 28. Rb1 Rxb1 29. Qxb1 Qxf4 30. Qb8+ Kg7 31. Qd6 Qxa4 32. Qd8 Qf4 33. Qxa5 Qxe5 34. Qc5 Qc7 35. c4 Qd7 36. Qd4+ f6 37. Qg4 h5 38. Qd4 e5 39. Qc5 d4 0-1

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.30"]
[Round "4"]
[White "Hoelzl, Franz"]
[Black "Sibe, Jan"]
[Result "1-0"]
[ECO "E24"]
[PlyCount "101"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 b6 7. Bg5 h6 8. Bh4 0-0 9. cxd5 exd5 10. e3 Qe7 11. Bf2 c5 12. Ne2 Ba6 13. g3 Nc6 14. Bg2 Rfe8 15. 0-0 Bxe2 16. Qxe2 cxd4 17. cxd4 Nxd4 18. Qd3 Ne6 19. Rae1 Nc5 20. Qb1 Rad8 21. Kh1 Nfd7 22. Rd1 Nf6 23. Rfe1 Rd6 24. Qa2 Qd7 25. Re2 Rd8 26. Red2 Qc6 27. Kg1 Ne8 28. Re1 Qb5 29. Red1 Qb3 30. Qa1 Na4 31. Rc1 b5 32. Bf1 a6 33. Be2 d4 34. exd4 Qe6 35. Re1 Qf6 36. Bd1 Nb6 37. Re4 g5 38. Kg2 Ng7 39. f4 Qg6 40. Bc2 f5 41. Re5 gxf4 42. Bb3+ Kh8 43. d5 fxg3 44. Bc5 gxh2+ 45. Kh1 R6d7 46. Re6 Qxe6 47. dxe6 Rxd2 48. Bxb6 Rc8 49. Bd4 Rc7 50. Be5 Rb7 51. Qc1 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.29"]
[Round "2"]
[White "Sibe, Jan"]
[Black "Glauser, Hansruedi"]
[Result "0-1"]
[ECO "C85"]
[PlyCount "66"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Bxc6 dxc6 7. Qe1 c5 8. Nxe5 Qd4 9. Nd3 c4 10. Nf4 g5 11. Ne2 Qxe4 12. d3 cxd3 13. cxd3 Qg6 14. Qc3 c6 15. Ng3 0-0 16. Qd2 Nd5 17. Nc3 Nf4 18. Re1 Be6 19. d4 Rad8 20. Qe3 Rfe8 21. Rd1 c5 22. dxc5 Rxd1+ 23. Nxd1 Bd5 24. Qe5 f6 25. Qd4 Bxc5 26. Qd2 Bxg2 27. Ne3 Bc6 28. a4 Qf7 29. Ngf5 Qe6 30. Qc2 Qd5 31. Nh6+ Kf8 32. f3 Rxe3 33. Bxe3 Bxe3+ 0-1

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.28"]
[Round "1"]
[White "Ree, Hans"]
[Black "Sibe, Jan"]
[Result "1-0"]
[ECO "E17"]
[PlyCount "81"]
[EventDate "1964.12.28"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "NED"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 Be7 6. b3 0-0 7. Bb2 d6 8. Nc3 Nbd7 9. d4 Ne4 10. Qc2 Nxc3 11. Bxc3 Qc8 12. e4 c5 13. d5 exd5 14. exd5 Bf6 15. Bh3 Bxc3 16. Ng5 f5 17. Qxc3 Ne5 18. f4 Ng6 19. Ne6 Qd7 20. Nxf8 Rxf8 21. Rfe1 Bc8 22. Re2 Qf7 23. Rae1 Bd7 24. Bg2 Re8 25. Rxe8+ Bxe8 26. a4 a5 27. Re6 Qf8 28. Bf3 Bd7 29. Re2 Qf7 30. Bh5 Kf8 31. Kf1 Kg8 32. h3 Kf8 33. g4 Qf6 34. Qxf6+ gxf6 35. Bxg6 hxg6 36. g5 Kf7 37. Kg2 fxg5 38. fxg5 Bc8 39. Kg3 Kf8 40. Kf4 Kf7 41. h4 1-0

