[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.06"]
[Round "11"]
[White "De Haseth, Pieters Lourens"]
[Black "Ree, Hans"]
[Result "0-1"]
[ECO "B83"]
[PlyCount "87"]
[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 Nc6 5. Nc3 d6 6. Be3 Nf6 7. Be2 Be7 8. 0-0 0-0 9. f4 Bd7 10. Qe1 Nxd4 11. Bxd4 Bc6 12. Bf3 b5 13. Nd1 Qd7 14. Nf2 Qb7 15. e5 dxe5 16. fxe5 Nd5 17. Nd3 a5 18. Kh1 b4 19. Bc5 Bxc5 20. Nxc5 Qc7 21. Nd3 Rfd8 22. Be4 Bb5 23. Qf2 Rac8 24. Rac1 Rd7 25. Rfe1 Qc4 26. h3 g6 27. Kh2 Qc7 28. Kh1 Bc4 29. Ra1 Ne7 30. a3 b3 31. Rac1 Qd8 32. Nc5 Rd2 33. Qg1 bxc2 34. Rxc2 Rxc2 35. Bxc2 Qd2 36. Ne4 Qxc2 37. Nd6 Rc6 38. Rc1 Qe2 39. Re1 Qd2 40. Rd1 Qg5 41. Qf2 Nf5 42. g4 Nxd6 43. exd6 Bd5+ 44. Kh2 0-1

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.05"]
[Round "10"]
[White "Bleiman, Yaacov"]
[Black "De Haseth, Pieters Lourens"]
[Result "1-0"]
[ECO "E80"]
[PlyCount "52"]
[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 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. f3 Bg7 7. Bg5 Na6 8. Qd2 h6 9. Be3 Nc7 10. Bd3 Bd7 11. Nge2 a6 12. a4 b6 13. g4 Ng8 14. Ng3 a5 15. 0-0-0 Qe7 16. h4 0-0-0 17. Be2 Rf8 18. Rdf1 Qe8 19. Bd1 f6 20. f4 Kb8 21. Rh2 Rh7 22. Rhf2 Ne7 23. fxe5 fxe5 24. Rxf8 Bxf8 25. Qf2 Rh8 26. Qf6 Nc8 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.04"]
[Round "9"]
[White "De Haseth, Pieters Lourens"]
[Black "Huebner, Robert"]
[Result "0-1"]
[ECO "C10"]
[PlyCount "84"]
[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 e6 2. d4 d5 3. Nc3 Nc6 4. Be3 Bb4 5. e5 f6 6. f4 fxe5 7. fxe5 Qh4+ 8. Bf2 Qe4+ 9. Qe2 Nh6 10. 0-0-0 Bxc3 11. Qh5+ g6 12. Qxh6 Bxd4 13. Re1 Qf5 14. Bxd4 Nxd4 15. Bd3 Qf8 16. Qh4 Nf5 17. Bxf5 Qxf5 18. g4 Qf4+ 19. Kb1 0-0 20. Nh3 Qf7 21. Ng5 Qg7 22. Rhf1 h6 23. Nh3 Rxf1 24. Rxf1 g5 25. Qe1 Bd7 26. Nf2 Rf8 27. Nd3 Bb5 28. Rf2 b6 29. Rxf8+ Qxf8 30. h4 Bxd3 31. cxd3 Qf3 32. Kc2 Qg2+ 33. Kc3 Qxg4 34. hxg5 Qxg5 35. b4 h5 36. Qd1 Qxe5+ 37. d4 Qg3+ 38. Kb2 Qg4 39. Qd2 h4 40. Kb3 Kg7 41. Qc2 Qg3+ 42. Ka4 a6 0-1

[Event "Groningen clock sim1"]
[Site "Groningen"]
[Date "1965.01.04"]
[Round "?"]
[White "Ivkov, Borislav"]
[Black "De Haseth, Pieters Lourens"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "51"]
[EventDate "1965.01.04"]
[EventType "simul"]
[EventRounds "1"]
[EventCountry "NED"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Qe2 Nb6 8. Bb3 Be7 9. Be3 a5 10. a3 Qc7 11. 0-0-0 Bd7 12. N1f3 0-0 13. Ne5 Nbd5 14. h4 b5 15. c4 bxc4 16. Bxc4 Rab8 17. Rd3 c5 18. Kb1 cxd4 19. Bxd4 Nf4 20. Qd2 Nxd3 21. Qxd3 g6 22. h5 Nxh5 23. Rxh5 Bxg5 24. Rxg5 f6 25. Rxg6+ Kh8 26. Rxf6 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.04"]
[Round "8"]
[White "Woodcock, Christopher Francis"]
[Black "De Haseth, Pieters Lourens"]
[Result "1/2-1/2"]
[ECO "B11"]
[PlyCount "36"]
[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. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Bg4 5. Bc4 e6 6. c3 Nd7 7. d4 Be7 8. Ng3 Ngf6 9. h3 Bxf3 10. Qxf3 Nd5 11. 0-0 0-0 12. Re1 Re8 13. Bd2 Nf8 14. Rad1 Qc7 15. Bb3 Ng6 16. Nh5 Nf6 17. Nf4 Nxf4 18. Bxf4 Bd6 1/2-1/2

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.02"]
[Round "7"]
[White "De Haseth, Pieters Lourens"]
[Black "Kolbak, Jens"]
[Result "1/2-1/2"]
[ECO "B74"]
[PlyCount "54"]
[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 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Be2 0-0 8. 0-0 Nc6 9. f4 Bd7 10. Nb3 Rc8 11. Bf3 Be6 12. Nd5 Nd7 13. c3 f5 14. Nd4 Bxd5 15. exd5 Bxd4 16. Bxd4 Nxd4 17. Qxd4 Qb6 18. Qxb6 Nxb6 19. Rfe1 Rfe8 20. Re2 Kf7 21. g4 Rc4 22. gxf5 Rxf4 23. fxg6+ hxg6 24. Kg2 Nc4 25. Kg3 Rf6 26. Bg4 Ne5 27. Be6+ Kg7 1/2-1/2

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1965.01.01"]
[Round "6"]
[White "Verstraeten, Roland"]
[Black "De Haseth, Pieters Lourens"]
[Result "1-0"]
[ECO "B14"]
[PlyCount "92"]
[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. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. c5 e6 7. a3 a5 8. Na4 Nd7 9. Bb5 Be7 10. Bf4 0-0 11. Nf3 f6 12. 0-0 Na7 13. Bxd7 Bxd7 14. Nb6 Nc6 15. Nxa8 Qxa8 16. Bc7 Qe8 17. Qb3 Bc8 18. Rfe1 g5 19. h3 g4 20. hxg4 Qg6 21. Rad1 Qxg4 22. Qd3 Rf7 23. Nh2 Qh5 24. Bg3 f5 25. Bf4 Rg7 26. Qf3 Qg6 27. b3 Bd7 28. g3 h5 29. b4 Bf6 30. Be5 Nxe5 31. dxe5 Bd8 32. Rd4 Bb5 33. Nf1 h4 34. Kg2 b6 35. Rc1 axb4 36. axb4 bxc5 37. bxc5 Ba5 38. Ne3 hxg3 39. fxg3 Bc7 40. Qf4 Qxg3+ 41. Qxg3 Rxg3+ 42. Kxg3 Bxe5+ 43. Kf3 Bxd4 44. c6 Ba6 45. c7 Bc8 46. Rb1 Kf7 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.31"]
[Round "5"]
[White "De Haseth, Pieters Lourens"]
[Black "Noorda, Sybold J"]
[Result "1-0"]
[ECO "C85"]
[PlyCount "75"]
[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 Be6 8. b3 Nd7 9. Bb2 f6 10. d4 Bd6 11. Nbd2 0-0 12. c4 b6 13. Rc1 Qe7 14. c5 bxc5 15. dxe5 Nxe5 16. Nxe5 fxe5 17. Nc4 Qg5 18. Rc3 Qh4 19. Bc1 Rab8 20. Qe2 Kh8 21. f3 g5 22. Qf2 Qxf2+ 23. Rxf2 h6 24. Na5 Rb5 25. Nc4 Rfb8 26. Ba3 a5 27. Rd2 Rd8 28. Nxe5 Kh7 29. Rcd3 a4 30. Nc4 axb3 31. axb3 Rxb3 32. Rxb3 Bxc4 33. Rbb2 Ra8 34. Rb7 Rxa3 35. Rxd6 Ra1+ 36. Kf2 Ra2+ 37. Kg3 Bf1 38. Rxc7+ 1-0

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.30"]
[Round "4"]
[White "Algera, Simon"]
[Black "De Haseth, Pieters Lourens"]
[Result "1/2-1/2"]
[ECO "B17"]
[PlyCount "46"]
[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. Ng3 Bg4 10. h3 Bxf3 11. Qxf3 e6 12. c3 Bd6 13. Bd3 Bc7 14. Qe2 Qe7 15. Bd2 h5 16. Bg5 Bf4 17. Bxf4 Nxf4 18. Qf3 Nxd3+ 19. Qxd3 h4 20. Ne4 Nxe4 21. Qxe4 Qg5 22. Qg4 Qxg4 23. hxg4 g5 1/2-1/2

[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 "1964.12.29"]
[Round "2"]
[White "Hoelzl, Franz"]
[Black "De Haseth, Pieters Lourens"]
[Result "0-1"]
[ECO "A56"]
[PlyCount "76"]
[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 c5 3. d5 e5 4. Nc3 d6 5. e4 g6 6. f4 exf4 7. Bxf4 Nh5 8. Be3 Bg7 9. Qc2 Bg4 10. Be2 Bxe2 11. Ngxe2 Nd7 12. h3 Ne5 13. 0-0-0 Qd7 14. b3 0-0-0 15. g4 Nf6 16. Rdf1 Rdf8 17. Nf4 Qe7 18. Rf2 Nfd7 19. Rhf1 Kb8 20. Qd2 Qd8 21. Nfe2 h6 22. Nb5 Nf6 23. Ng3 a6 24. Na3 Nfd7 25. Kc2 Qb6 26. Rb1 Qb4 27. Qc1 Qa5 28. Bd2 Qd8 29. b4 Qh4 30. Rb3 f5 31. exf5 gxf5 32. Rxf5 Qxh3 33. Rxf8+ Rxf8 34. Nf5 Qxg4 35. Nxg7 Qg6+ 36. Kb2 Qxg7 37. Qc3 cxb4 38. Qxb4 Nd3+ 0-1

[Event "Niemeyer U21-03"]
[Site "Groningen"]
[Date "1964.12.28"]
[Round "1"]
[White "Glauser, Hansruedi"]
[Black "De Haseth, Pieters Lourens"]
[Result "1-0"]
[ECO "B17"]
[PlyCount "49"]
[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 e6 7. Qe2 Nb6 8. Bb3 Be7 9. N1f3 0-0 10. Bd2 a5 11. c3 Nbd5 12. 0-0 h6 13. Nh3 b6 14. Ne5 c5 15. c4 a4 16. Bd1 Nc7 17. Nc6 Qe8 18. Nxe7+ Qxe7 19. dxc5 bxc5 20. Bc3 Bb7 21. Bc2 Bc6 22. Nf4 Nce8 23. Rad1 Nd6 24. Bxf6 Qxf6 25. Rxd6 1-0

