[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.23"]
[Round "7.2"]
[White "Anelli, Antonio"]
[Black "Duin, Laurens"]
[Result "0-1"]
[ECO "A85"]
[PlyCount "81"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 d6 2. d4 f5 3. c4 Nf6 4. Nc3 g6 5. Bf4 Bg7 6. e3 0-0 7. c5 Nh5 8. h4 Nc6 9. Bb5 a6 10. Bxc6 bxc6 11. Qb3+ Kh8 12. 0-0-0 Qe8 13. Qa3 e5 14. dxe5 dxe5 15. Bh2 Qe7 16. Qa5 Rb8 17. Rd2 h6 18. Rhd1 Re8 19. a4 Bf6 20. Kb1 Qf7 21. Na2 g5 22. hxg5 hxg5 23. Rh1 g4 24. Bxe5 Rxe5 25. Nxe5 Bxe5 26. Nb4 Rxb4 27. Qxb4 Kg7 28. Qb8 Be6 29. f4 Bf6 30. e4 fxe4 31. g3 e3 32. Rdh2 Bf5+ 33. Kc1 Qc4+ 34. Kd1 Qd3+ 35. Ke1 Qb1+ 36. Ke2 Nxg3+ 37. Kxe3 Qd3+ 38. Kf2 Bd4+ 39. Ke1 Qb1+ 40. Kd2 Qc2+ 41. Ke1 0-1

[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.22"]
[Round "6.2"]
[White "Duin, Laurens"]
[Black "Melcon, Nestor"]
[Result "1/2-1/2"]
[ECO "E69"]
[PlyCount "85"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 0-0 5. 0-0 d6 6. d4 Nbd7 7. Nc3 c6 8. e4 e5 9. h3 Qc7 10. Be3 Re8 11. Qc2 a5 12. dxe5 dxe5 13. c5 Nf8 14. Na4 Be6 15. Nb6 Rad8 16. Bd2 Nxe4 17. Qxe4 Bf5 18. Qe3 e4 19. Nh4 Bd4 20. Qa3 Ne6 21. Na4 Bf6 22. Nxf5 gxf5 23. Rad1 Rd3 24. Nc3 Qe5 25. Be3 Red8 26. Rde1 Qc7 27. Qb3 Nd4 28. Qa4 Ne6 29. Nxe4 fxe4 30. Bxe4 R3d7 31. Qc2 Kg7 32. Qe2 Qe5 33. Bb1 Rd5 34. Qc2 Qh5 35. Kg2 Ng5 36. Bxg5 Bxg5 37. a3 Bf6 38. b4 axb4 39. axb4 Rd2 40. Qf5 Qxf5 41. Bxf5 Rb2 42. Re4 Bc3 43. Rg1 1/2-1/2

[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.21"]
[Round "5.2"]
[White "Pilnik, Hermann"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "B06"]
[PlyCount "43"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Be3 c6 5. Qd2 b5 6. f3 Nd7 7. a4 bxa4 8. Nxa4 Ngf6 9. Nh3 0-0 10. Nf2 Qc7 11. Be2 e5 12. dxe5 dxe5 13. 0-0 Nh5 14. Rfd1 f5 15. Qd6 Qxd6 16. Rxd6 f4 17. Bd2 Rf6 18. Bc4+ Kf8 19. Rd3 Ke8 20. Ng4 Rf8 21. Rd6 Nhf6 22. Re6+ 1-0

[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.20"]
[Round "4.2"]
[White "Duin, Laurens"]
[Black "Miana, Elias T"]
[Result "1/2-1/2"]
[ECO "C19"]
[PlyCount "72"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Nf3 Nbc6 8. a4 Qa5 9. Qd2 cxd4 10. cxd4 Qxd2+ 11. Bxd2 Nf5 12. Bc3 Bd7 13. a5 0-0 14. Rb1 b6 15. axb6 axb6 16. Rxb6 Rfb8 17. Rxb8+ Rxb8 18. Kd2 Rb1 19. g4 Nfe7 20. Bg2 Rxh1 21. Bxh1 Na7 22. Ke3 Ba4 23. Kd2 Nec6 24. Bg2 Kf8 25. Bf1 Bb5 26. Bd3 Bxd3 27. Kxd3 Nb5 28. Nd2 Ke8 29. f4 Kd7 30. Nf1 Na3 31. Ne3 Nb5 32. Bb2 Nb4+ 33. Kd2 Nc6 34. Kd3 Nb4+ 35. Kd2 Nc6 36. Kd3 Nb4+ 1/2-1/2

[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.19"]
[Round "3.2"]
[White "Duin, Laurens"]
[Black "Garcia, Horacio"]
[Result "1/2-1/2"]
[ECO "B31"]
[PlyCount "61"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Nf6 5. Re1 Bg7 6. h3 0-0 7. c3 Qb6 8. Na3 a6 9. Ba4 d5 10. d3 Rd8 11. Qe2 dxe4 12. dxe4 Qc7 13. Bc2 b5 14. Nb1 Nd7 15. Nbd2 Bb7 16. Nf1 Nde5 17. Bf4 Nxf3+ 18. Qxf3 Ne5 19. Qg3 c4 20. Rad1 Qc5 21. Be3 Qc6 22. Bd4 Nd7 23. Bxg7 Kxg7 24. Ne3 Nf6 25. Nf5+ Kf8 26. Nd4 Qc5 27. e5 Nh5 28. Qe3 Kg8 29. e6 f6 30. Qh6 Ng7 31. Re3 1/2-1/2

[Event "Playas de General Madariaga-08"]
[Site "Pinamar"]
[Date "1973.03.17"]
[Round "1.2"]
[White "Duin, Laurens"]
[Black "Emma, Jaime"]
[Result "1/2-1/2"]
[ECO "B05"]
[PlyCount "40"]
[EventDate "1973.03.17"]
[EventType "team-tourn"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 e6 6. 0-0 Be7 7. h3 Bh5 8. c4 Nb6 9. Nc3 0-0 10. Be3 Nc6 11. exd6 cxd6 12. d5 Bxf3 13. Bxf3 Ne5 14. b3 Nxf3+ 15. Qxf3 e5 16. Qe2 Nd7 17. Rac1 a6 18. b4 Rc8 19. Rfd1 f5 20. f3 Bg5 1/2-1/2

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.29"]
[Round "9"]
[White "Colussi, Adriano"]
[Black "Duin, Laurens"]
[Result "1/2-1/2"]
[ECO "E92"]
[PlyCount "40"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Bxf6 Bxf6 11. Nd5 Bd8 12. 0-0-0 c6 13. Ne3 Nd7 14. Rd2 Bf6 15. Rhd1 Nf8 16. Nc2 Bg4 17. h3 Bxf3 18. Bxf3 Rad8 19. Rxd8 Rxd8 20. Rxd8 Bxd8 1/2-1/2

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.27"]
[Round "8"]
[White "Duin, Laurens"]
[Black "Pleci, Isaias"]
[Result "0-1"]
[ECO "B45"]
[PlyCount "100"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 c5 2. e4 e6 3. d4 Nf6 4. Nc3 cxd4 5. Nxd4 Nc6 6. Be3 Qa5 7. Nb3 Qd8 8. Bd3 Be7 9. f4 d5 10. e5 Nd7 11. 0-0 h5 12. Qf3 g6 13. Rad1 a6 14. a4 Qc7 15. Qg3 Nf8 16. Qf2 Bd7 17. Bb6 Qc8 18. a5 Nb4 19. Bc5 Nxd3 20. cxd3 Bxc5 21. Nxc5 Bc6 22. Rc1 Qd8 23. b4 Nd7 24. Ne2 Nxc5 25. Rxc5 Bb5 26. Qe3 Rc8 27. Rxc8 Qxc8 28. Rc1 Qd7 29. Qc5 Bxd3 30. Qc8+ Qd8 31. Qxb7 0-0 32. Nd4 Qh4 33. g3 Qh3 34. Nf3 Be4 35. Rf1 h4 36. Nxh4 Kg7 37. Rc1 Qg4 38. Qxa6 Rh8 39. Ng2 Qh3 40. Qf1 Qxh2+ 41. Kf2 d4 42. Qg1 Qh5 43. Qd1 Qh3 44. Qf1 Qh2 45. Qg1 Qh5 46. Qd1 Qh3 47. Qf1 d3 48. b5 Rd8 49. b6 d2 50. Ra1 Rd3 0-1

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.25"]
[Round "7"]
[White "Fenoglio, Virgilio"]
[Black "Duin, Laurens"]
[Result "1/2-1/2"]
[ECO "E92"]
[PlyCount "45"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. h3 c6 11. 0-0-0 Nbd7 12. Rhe1 Nc5 13. Bf1 h6 14. Bd2 a5 15. Kc2 Nfd7 16. Be3 Bf8 17. Nh2 Nf6 18. f3 Be6 19. Ng4 Bxg4 20. hxg4 Red8 21. Rxd8 Rxd8 22. Rd1 Rxd1 23. Nxd1 1/2-1/2

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.24"]
[Round "6"]
[White "Duin, Laurens"]
[Black "Adad, Carlos"]
[Result "1-0"]
[ECO "A52"]
[PlyCount "54"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 Nxe5 5. f4 Nec6 6. Be3 Bb4+ 7. Nc3 Qe7 8. Qd3 0-0 9. Nf3 Na6 10. a3 Bxc3+ 11. Qxc3 Qxe4 12. 0-0-0 d6 13. Ng5 Qe7 14. Re1 f5 15. Bd2 Qf6 16. Bd3 Nc5 17. Bc2 Nd4 18. Bd1 h6 19. Nf3 Ndb3+ 20. Bxb3 Qxc3+ 21. Bxc3 Nxb3+ 22. Kc2 Nc5 23. Re7 Rf7 24. Re8+ Kh7 25. h4 Ne6 26. g3 c6 27. Re1 Nc7 1-0

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.22"]
[Round "5"]
[White "Duin, Laurens"]
[Black "Eliskases, Erich Gottlieb"]
[Result "0-1"]
[ECO "A68"]
[PlyCount "84"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 b5 10. e5 dxe5 11. fxe5 Ng4 12. Bf4 Nd7 13. e6 Nde5 14. Nxe5 Nxe5 15. exf7+ Rxf7 16. 0-0 a6 17. Qd2 Bb7 18. Rad1 Qf8 19. Qe3 Re8 20. Qg3 Nc4 21. Bxc4 bxc4 22. Rf3 Bd4+ 23. Kh1 Rf5 24. Bd2 Rxf3 25. Qxf3 Qxf3 26. gxf3 Re5 27. Kg2 Bxd5 28. Nxd5 Rxd5 29. Bc3 Kf7 30. f4 Ke6 31. Kf3 Kf5 32. Rd2 Rd6 33. Rd1 Be5 34. Rxd6 Bxd6 35. Bd2 g5 36. fxg5 Bxh2 37. a4 Bd6 38. Bc1 Be7 39. Be3 Bxg5 40. Bxc5 Bf6 41. Ba3 h5 42. Kg3 Ke4 0-1

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.20"]
[Round "4"]
[White "Peduran, Osvaldo"]
[Black "Duin, Laurens"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "56"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nd2 d5 3. e3 c5 4. c3 Nc6 5. Bd3 e5 6. Ne2 cxd4 7. cxd4 e4 8. Bb1 Bd6 9. f3 0-0 10. 0-0 exf3 11. Nxf3 Bg4 12. h3 Bh5 13. Nc3 Re8 14. Qd2 Bg6 15. Bxg6 hxg6 16. Qf2 Ne4 17. Nxe4 dxe4 18. Ne1 Qc7 19. Bd2 Bg3 20. Qe2 Qd7 21. Qb5 a6 22. Qg5 Bxe1 23. Bxe1 Ne7 24. Rc1 Rac8 25. Bd2 b6 26. Qf4 Nd5 27. Qf2 f5 28. Qg3 Qe6 0-1

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.18"]
[Round "3"]
[White "Szmetan, Jorge"]
[Black "Duin, Laurens"]
[Result "1/2-1/2"]
[ECO "B77"]
[PlyCount "97"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 0-0 9. Bc4 Qa5 10. 0-0-0 Nxd4 11. Bxd4 Be6 12. Bb3 b5 13. Kb1 b4 14. Nd5 Bxd5 15. exd5 Qb5 16. Rhe1 a5 17. Qe2 Qxe2 18. Rxe2 a4 19. Bc4 Rfc8 20. b3 Rc7 21. Bb5 axb3 22. axb3 Ra5 23. Bc4 Rca7 24. Kc1 Nxd5 25. Bxd5 Ra1+ 26. Kd2 Rxd1+ 27. Kxd1 Bxd4 28. Re4 Bc3 29. Rc4 Ra1+ 30. Ke2 Re1+ 31. Kf2 Rd1 32. Be4 d5 33. Rc8+ Kg7 34. Bd3 Rd2+ 35. Kf1 h5 36. Rd8 e6 37. Rc8 Rd1+ 38. Kf2 h4 39. f4 Rd2+ 40. Kf3 h3 41. gxh3 Rxh2 42. Kg3 Rh1 43. Kg2 Rd1 44. Rc7 Rd2+ 45. Kf3 Rh2 46. Kg3 Rd2 47. Kf3 Kf8 48. Rc8+ Kg7 49. Rc7 1/2-1/2

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.17"]
[Round "2"]
[White "Duin, Laurens"]
[Black "Mazzoleni, Julio"]
[Result "1/2-1/2"]
[ECO "D02"]
[PlyCount "138"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nc6 2. Nf3 d5 3. Bf4 Bf5 4. e3 e6 5. Be2 Bd6 6. Bxd6 Qxd6 7. 0-0 Nf6 8. c4 dxc4 9. Na3 0-0 10. Nxc4 Qe7 11. Qb3 Qb4 12. Qxb4 Nxb4 13. a3 Nc6 14. Rac1 a5 15. Nfd2 Nd5 16. Bf3 Bd3 17. Rfd1 Bxc4 18. Rxc4 Rfc8 19. Rdc1 Kf8 20. Nb3 Ke8 21. R1c2 a4 22. Nc1 Kd8 23. Nd3 Nce7 24. e4 Nb6 25. Rc5 Nd7 26. Rb5 Nc6 27. Rd2 Na5 28. g3 c6 29. Rb4 Nb3 30. Rd1 Kc7 31. Nc1 Nxc1 32. Rxc1 Rd8 33. Bd1 Nb6 34. f4 f5 35. Bf3 Ra5 36. Kf2 g5 37. fxg5 fxe4 38. Bxe4 Rxg5 39. Ke3 h5 40. Rf1 Rd7 41. Rf6 Re7 42. Rh6 e5 43. dxe5 Rgxe5 44. Kf3 Rf7+ 45. Kg2 Nd7 46. Rd4 Nf6 47. Bf3 Rb5 48. Rd2 Rf5 49. Rd3 Rb5 50. Rd2 Rf5 51. Rh8 Kb6 52. h3 Rg5 53. h4 Rf5 54. Ra8 Nd7 55. Be4 Re5 56. Rxa4 Kc7 57. Bf3 Ref5 58. Bd1 Nb6 59. Re4 Rg7 60. Rf2 Rd5 61. Bb3 Rdd7 62. Ref4 Nd5 63. Bxd5 Rxd5 64. Rf7+ Rxf7 65. Rxf7+ Kb6 66. Rf2 Rd3 67. Rf3 Rd2+ 68. Rf2 Rd3 69. Kh3 Rb3 1/2-1/2

[Event "Buenos Aires qual"]
[Site "Buenos Aires"]
[Date "1970.06.15"]
[Round "1"]
[White "Pilnik, Hermann"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "B74"]
[PlyCount "171"]
[EventDate "1970.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. f4 Nc6 7. Nb3 Bg7 8. Be2 0-0 9. Be3 a5 10. a4 Be6 11. 0-0 Qc8 12. Nd4 Nxd4 13. Bxd4 Bc4 14. Kh1 Bxe2 15. Qxe2 Qc6 16. Rad1 Rac8 17. Qf3 Nd7 18. Bxg7 Kxg7 19. e5 Qxf3 20. Rxf3 Rc6 21. exd6 Rxd6 22. Rxd6 exd6 23. Rd3 Re8 24. h3 Re6 25. Kh2 f5 26. Nb5 Nc5 27. Rxd6 Re4 28. Rd5 b6 29. b3 Rxf4 30. Rd6 Rf2 31. Nd4 f4 32. Kg1 Kf7 33. Kxf2 Ne4+ 34. Kf3 Nxd6 35. Kxf4 Kf6 36. h4 h6 37. g4 g5+ 38. hxg5+ hxg5+ 39. Ke3 Nf7 40. Nf3 Nh6 41. Nh2 Ke5 42. c3 Nf7 43. Nf3+ Kd5 44. Kd3 Nh6 45. Nh2 Nf7 46. c4+ Kc5 47. Nf3 Nh6 48. Ne5 Kb4 49. Kc2 Kc5 50. Kc3 Ng8 51. Nd3+ Kd6 52. Kd4 Nh6 53. c5+ bxc5+ 54. Nxc5 Nxg4 55. Ne4+ Kc6 56. Nxg5 Nf6 57. Nf3 Nd7 58. Nd2 Nc5 59. Kc4 Nd7 60. Nf3 Nb6+ 61. Kd4 Nd7 62. Ne1 Nc5 63. Kc4 Ne4 64. Nd3 Kb6 65. Ne5 Nd2+ 66. Kc3 Ne4+ 67. Kd4 Nf6 68. Nc4+ Ka6 69. Kc5 Ne4+ 70. Kc6 Nc3 71. Nd6 Ne2 72. Nb5 Nc1 73. Nd4 Nd3 74. Ne6 Nb4+ 75. Kd6 Kb6 76. Nc5 Nc2 77. Nd7+ Ka6 78. Kc7 Ka7 79. Nb8 Ne3 80. Nc6+ Ka6 81. Nd4 Nd5+ 82. Kd6 Nc3 83. Kc6 Ne4 84. Ne6 Ka7 85. Kb5 Nd2 86. Nd4 1-0

[Event "Mar del Plata International Open-03"]
[Site "Mar del Plata"]
[Date "1970.03.26"]
[Round "6"]
[White "Duin, Laurens"]
[Black "Belmonte Schwarzbaum, Juan"]
[Result "0-1"]
[ECO "C63"]
[PlyCount "46"]
[EventDate "1970.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. Qe2 Be7 8. Bxc6 bxc6 9. Qxe5 Qf7 10. 0-0 0-0 11. d3 d6 12. Qg3 Rb8 13. b3 Bf6 14. Rb1 Rb5 15. Ne1 Qh5 16. Bb2 Rg5 17. Qe3 Re8 18. Qf4 Bxb2 19. Rxb2 Bh3 20. c4 Rg4 21. Qd2 Rxe1 22. Qxe1 Rxg2+ 23. Kh1 Rg1+ 0-1

[Event "Mar del Plata International Open-03"]
[Site "Mar del Plata"]
[Date "1970.03.23"]
[Round "3"]
[White "Rocha, Antonio Cavilhas"]
[Black "Duin, Laurens"]
[Result "1/2-1/2"]
[ECO "B77"]
[PlyCount "54"]
[EventDate "1970.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[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. Bc4 Nc6 9. Qd2 Nxd4 10. Bxd4 Be6 11. Bb3 Qa5 12. 0-0 Nd7 13. Bxg7 Kxg7 14. Rad1 Qc5+ 15. Kh1 b5 16. f4 Nf6 17. Qd4 Qxd4 18. Rxd4 a6 19. e5 dxe5 20. fxe5 Nd7 21. Re1 Ra7 22. Bxe6 fxe6 23. a4 Rf2 24. Ne4 Rxc2 25. Ng5 Nf8 26. axb5 axb5 27. Rb4 Re2 1/2-1/2

[Event "Mar del Plata International Open-03"]
[Site "Mar del Plata"]
[Date "1970.03.22"]
[Round "2"]
[White "Duin, Laurens"]
[Black "Damjanovic, Mato"]
[Result "1/2-1/2"]
[ECO "B26"]
[PlyCount "87"]
[EventDate "1970.03.21"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "ARG"]
[SourceTitle "EXT 1999"]
[Source "ChessBase"]
[SourceDate "1998.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1998.11.16"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 d6 6. Nge2 e6 7. 0-0 Nge7 8. Be3 Nd4 9. Qd2 0-0 10. Nd1 e5 11. c3 Nxe2+ 12. Qxe2 Rb8 13. Qd2 b6 14. Bh6 Bxh6 15. Qxh6 f5 16. f4 Ba6 17. c4 fxe4 18. Bxe4 Nf5 19. Qg5 Qxg5 20. fxg5 Kg7 21. Nc3 b5 22. b3 b4 23. Nd5 Nd4 24. Nc7 Bb7 25. Rxf8 Kxf8 26. Rf1+ Kg8 27. Rf6 Bxe4 28. dxe4 Rd8 29. Ne6 Nxe6 30. Rxe6 Kf7 31. Rf6+ Ke7 32. Kg2 a5 33. h4 Rg8 34. Kf3 a4 35. Kg4 axb3 36. axb3 Ra8 37. h5 Ra3 38. hxg6 hxg6 39. Rxg6 Rxb3 40. Rg7+ Kf8 41. Rb7 Re3 42. Kf5 Rxg3 43. Ke6 Rd3 44. Kf6 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "17"]
[White "Behrensen, Jorge"]
[Black "Duin, Laurens"]
[Result "0-1"]
[ECO "B52"]
[PlyCount "190"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. 0-0 Nc6 6. Re1 Nf6 7. d4 cxd4 8. Nxd4 g6 9. Nc3 Bg7 10. Nb3 0-0 11. Nd5 Rfe8 12. c3 Ne5 13. Qe2 Rac8 14. Nxf6+ Bxf6 15. Be3 a6 16. Bd4 Bg7 17. Rad1 Qa4 18. f4 Nc6 19. Bxg7 Kxg7 20. Nc1 b5 21. Rd3 Qc4 22. Kh1 a5 23. b3 Qc5 24. Qd2 b4 25. c4 a4 26. Ree3 axb3 27. axb3 Ra8 28. Rh3 f6 29. Rd5 Qa7 30. Qe1 Qa1 31. Rd1 Qb2 32. Nd3 Qc3 33. Qh4 Rh8 34. f5 Ra1 35. Rxa1 Qxa1+ 36. Ne1 Ne5 37. fxg6 Nxg6 38. Qf2 Ra8 39. Re3 Ra2 40. Qg3 Rb2 41. h4 Kf7 42. Kh2 Rb1 43. h5 Ne5 44. Kh3 Qd4 45. Qf4 Qc5 46. g4 Qd4 47. g5 Qd1 48. g6+ hxg6 49. hxg6+ Nxg6 50. Qf3 Ne5 51. Qxd1 Rxd1 52. Kg3 Ke6 53. Nc2 Nc6 54. Kf4 Rf1+ 55. Kg4 Rc1 56. Re2 Rb1 57. Re3 Ke5 58. Ne1 Na5 59. Nf3+ Ke6 60. Nd4+ Kd7 61. Rh3 Nc6 62. Nc2 Rb2 63. Ne1 Re2 64. Nd3 Rxe4+ 65. Kf3 f5 66. Kf2 Nd4 67. Nxb4 Re2+ 68. Kf1 Rb2 69. Nd5 Rxb3 70. Rh7 Nc6 71. Kf2 Ke6 72. Ke2 Ra3 73. Kd2 Ra7 74. Kc3 Ke5 75. Rh5 e6 76. Nb6 Rg7 77. Kd3 Rg3+ 78. Kd2 Kd4 79. Rh6 Rd3+ 80. Kc2 Nb4+ 81. Kc1 Re3 82. Kd2 Re4 83. Nc8 Kc5 84. Rh7 Rxc4 85. Rc7+ Kd4 86. Rxc4+ Kxc4 87. Nxd6+ Kd5 88. Ne8 e5 89. Ke3 Nc6 90. Nc7+ Kd6 91. Nb5+ Ke6 92. Nc7+ Kf6 93. Ne8+ Kg5 94. Nd6 Nb4 95. Nf7+ Kf6 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "5"]
[White "Cafure, Emilio"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "D37"]
[PlyCount "131"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 dxc4 7. Bxc4 Be7 8. 0-0 0-0 9. Qe2 a6 10. Rd1 b5 11. dxc5 Qc7 12. Bd3 Bxc5 13. Bd2 Bb7 14. Rac1 Qb6 15. Ng5 h6 16. Nge4 Nxe4 17. Nxe4 Be7 18. Bc3 f5 19. Ng3 b4 20. Bd4 Nxd4 21. exd4 Bg5 22. Rc5 Kh8 23. Re5 Rad8 24. Rxe6 Qxd4 25. Bc2 Qxb2 26. Rxd8 Bxd8 27. Re8 Qa1+ 28. Nf1 Qf6 29. Qh5 Bb6 30. Bxf5 Be4 31. Qg6 Qxg6 32. Rxf8+ Kh7 33. Bxg6+ Bxg6 34. Rb8 Bc5 35. Nd2 Bd3 36. Rc8 Be7 37. Rc7 Bf6 38. Rd7 Bc2 39. Ra7 Bd3 40. Nb3 Bb5 41. Ra8 Bc4 42. f3 Kg6 43. Kf2 Kf5 44. Ke3 Bg5+ 45. Kd4 Bf1 46. g3 Bg2 47. Rf8+ Bf6+ 48. Ke3 Bf1 49. Nd2 Bb5 50. Ne4 Ke6 51. Nxf6 gxf6 52. Kd4 Kf5 53. Kc5 Be2 54. f4 h5 55. Kxb4 Kg4 56. Rxf6 Kh3 57. Re6 Bg4 58. Rxa6 Kxh2 59. Ra3 Kg2 60. Rc3 Bf3 61. f5 Kxg3 62. f6 h4 63. f7 h3 64. f8Q h2 65. Qxf3+ Kh4 66. a4 1-0

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "7"]
[White "Cruz, Raul C"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "D50"]
[PlyCount "87"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5 5. cxd5 cxd4 6. Qxd4 Be7 7. e4 Nc6 8. Qd1 exd5 9. Bxf6 Bxf6 10. exd5 Nd4 11. Bd3 0-0 12. Nge2 Nxe2 13. Bxe2 Qb6 14. Qd2 Bf5 15. 0-0 h6 16. Rad1 Rac8 17. Bd3 Bg4 18. Rb1 Bg5 19. Qc2 g6 20. Qa4 h5 21. h3 Bf5 22. Bxf5 gxf5 23. Qd7 Qg6 24. Qxb7 Kh7 25. Rfd1 Rcd8 26. Qb5 Rg8 27. Qe2 Rg7 28. Qf3 Rdg8 29. Kh1 h4 30. Rg1 Be7 31. Rbd1 a6 32. Rd4 Qf6 33. Qh5+ Qh6 34. Qxh6+ Kxh6 35. d6 Bf6 36. Rd5 Kg6 37. d7 Rd8 38. Re1 Rgg8 39. Rd6 Kg7 40. Nd5 Bxb2 41. Ne7 Ba3 42. Nxf5+ Kf8 43. Rxa6 Bc5 44. Re8+ 1-0

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "4"]
[White "Duin, Laurens"]
[Black "Bielicki, Carlos"]
[Result "1/2-1/2"]
[ECO "D01"]
[PlyCount "42"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 h6 4. Bxf6 exf6 5. e3 c6 6. Bd3 f5 7. Qf3 g6 8. Nge2 Bg7 9. h3 h5 10. 0-0-0 Nd7 11. g4 fxg4 12. hxg4 Nf6 13. gxh5 Bg4 14. Qg3 Bxh5 15. Rde1 Bxe2 16. Rxh8+ Bxh8 17. Rxe2 Nh5 18. Qh2 Bg7 19. Re1 Qe7 20. Rg1 Nf6 21. Qh3 Qd7 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "20"]
[White "Duin, Laurens"]
[Black "Bolbochan, Jacobo"]
[Result "0-1"]
[ECO "C71"]
[PlyCount "80"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. d4 b5 6. Bb3 Nxd4 7. Nxd4 exd4 8. c3 Nf6 9. cxd4 Bb7 10. 0-0 Be7 11. e5 dxe5 12. dxe5 Qxd1 13. Rxd1 Ne4 14. Be3 Bc5 15. Bxc5 Nxc5 16. Bd5 0-0-0 17. Nc3 Bxd5 18. Nxd5 Kb7 19. Rac1 Ne6 20. Kf1 Rd7 21. Ne3 Rhd8 22. Rxd7 Rxd7 23. g3 Rd2 24. Rc2 Rxc2 25. Nxc2 c5 26. f4 Kc6 27. Ne3 Nd4 28. Kf2 c4 29. g4 Kc5 30. Nf5 Nxf5 31. gxf5 g6 32. f6 Kd5 33. Ke3 g5 34. fxg5 Kxe5 35. a3 Kf5 36. Kd4 Kxg5 37. Kc5 Kxf6 38. Kb6 Ke5 39. Kxa6 f5 40. Kxb5 f4 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "18"]
[White "Duin, Laurens"]
[Black "Calneggia, Raul"]
[Result "1/2-1/2"]
[ECO "C15"]
[PlyCount "80"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Nge2 dxe4 5. a3 Be7 6. Nxe4 Nf6 7. N2c3 0-0 8. Be3 b6 9. Nxf6+ Bxf6 10. Qf3 c6 11. Bd3 Ba6 12. 0-0-0 Bxd3 13. Rxd3 a5 14. Ne4 Kh8 15. Qh5 Qd5 16. Nxf6 gxf6 17. Qxd5 cxd5 18. Rc3 Na6 19. Rd1 Rg8 20. g3 Rgc8 21. Rdd3 b5 22. Bd2 a4 23. b3 Kg7 24. Kb2 h5 25. h3 Kg6 26. f3 Rab8 27. Rxc8 Rxc8 28. Rc3 Rxc3 29. Kxc3 f5 30. bxa4 bxa4 31. Bf4 Kf6 32. Bd6 Kg5 33. h4+ Kg6 34. Kd3 f6 35. c4 Kf7 36. c5 e5 37. dxe5 fxe5 38. Bxe5 Nxc5+ 39. Kc3 Ke6 40. Bg7 Kd7 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "2"]
[White "Duin, Laurens"]
[Black "Foguelman, Alberto"]
[Result "1/2-1/2"]
[ECO "B92"]
[PlyCount "81"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. 0-0 Qc7 9. a4 Nc6 10. Be3 Nb4 11. f4 Be7 12. f5 Bc4 13. a5 d5 14. Bb6 Qc8 15. Bxc4 Qxc4 16. exd5 Nfxd5 17. Nxd5 Nxd5 18. Qf3 0-0 19. Nd2 Qc6 20. Kh1 Rac8 21. Ne4 Nxb6 22. axb6 f6 23. Rad1 Rfd8 24. Nc3 Qxf3 25. gxf3 Kf8 26. h4 Rc6 27. Rxd8+ Bxd8 28. Rd1 Ke8 29. Rg1 Kf8 30. Rd1 Bxb6 31. Rd7 Rc7 32. Rd8+ Ke7 33. Rh8 Rd7 34. Rxh7 Kd6 35. h5 Be3 36. Ne4+ Kc7 37. Kg2 Rf7 38. Kf1 Bh6 39. Rh8 Rd7 40. Ke2 Bf4 41. Ke1 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "16"]
[White "Duin, Laurens"]
[Black "Pelikan, Jorge"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "43"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2 c6 5. Nf3 Bg7 6. 0-0 0-0 7. a4 Bg4 8. Nd2 Bxe2 9. Qxe2 Nfd7 10. Nb3 e5 11. Be3 Na6 12. Rad1 Qe7 13. Rd2 f5 14. exf5 gxf5 15. dxe5 Nxe5 16. f4 Ng4 17. Bd4 Bxd4+ 18. Nxd4 Qf7 19. Qe6 Qxe6 20. Nxe6 Rf6 21. Re1 Re8 22. Rde2 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "10"]
[White "Duin, Laurens"]
[Black "Perez Cascella, Julio"]
[Result "1/2-1/2"]
[ECO "C13"]
[PlyCount "42"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 d5 2. Nc3 Nf6 3. Bg5 e6 4. e4 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nf3 Be7 8. Bd3 Nd7 9. 0-0 0-0 10. Qe2 c5 11. dxc5 Nxc5 12. Nxc5 Bxc5 13. Qe5 Be7 14. Rad1 Qb6 15. b3 Qc5 16. Rfe1 Qxe5 17. Nxe5 Bf6 18. f4 Rb8 19. Be4 Bxe5 20. fxe5 b6 21. c4 Bb7 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "6"]
[White "Duin, Laurens"]
[Black "Pugach, Mario"]
[Result "1/2-1/2"]
[ECO "B60"]
[PlyCount "89"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. e4 d6 6. Bg5 Bd7 7. Be2 a6 8. 0-0 e6 9. Kh1 Be7 10. f4 0-0 11. Nxc6 Bxc6 12. Bd3 Nd7 13. Bxe7 Qxe7 14. Qh5 Nc5 15. f5 exf5 16. exf5 Nxd3 17. f6 Qe5 18. Qg4 g6 19. cxd3 h5 20. Qh4 Qe3 21. d4 Rfe8 22. d5 Bb5 23. Rfe1 Qd2 24. a4 g5 25. Ne4 gxh4 26. Nxd2 Rxe1+ 27. Rxe1 Bxa4 28. Re7 Rc8 29. h3 Rc1+ 30. Kh2 Rd1 31. Ne4 Rxd5 32. Rxb7 Bc2 33. Nc3 Rf5 34. Rb6 d5 35. Rd6 Bb3 36. Ne2 Bc4 37. Nd4 Rf4 38. Nf3 Kh7 39. Ne5 Rf2 40. Nxc4 dxc4 41. Rd4 Rxb2 42. Rxc4 Rb6 43. Rxh4 Kg6 44. Ra4 Rxf6 45. Ra5 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "12"]
[White "Duin, Laurens"]
[Black "Ramirez, R."]
[Result "0-1"]
[ECO "D01"]
[PlyCount "82"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 g6 5. Qd3 Bg7 6. 0-0-0 c6 7. h3 b5 8. Bxf6 Nxf6 9. Nd2 a5 10. e4 a4 11. exd5 Nxd5 12. Nxd5 Qxd5 13. Qf3 Be6 14. Qxd5 Bxd5 15. c4 bxc4 16. Nxc4 0-0 17. Kb1 Rab8 18. Ne5 Rb4 19. a3 Rb7 20. Rd2 Bh6 21. Rc2 Be4 22. Bd3 Bxg2 23. Rg1 Bd5 24. Nxc6 Bxc6 25. Rxc6 Rfb8 26. Rc2 Bg7 27. Be4 Rb3 28. Rgc1 Bxd4 29. Rc8+ Kg7 30. Rxb8 Rxb8 31. Rc2 Rb6 32. Rd2 e5 33. Bf3 Kf6 34. Bd1 Ra6 35. Rc2 Kg5 36. Rc4 Rb6 37. Rc2 Kh4 38. Re2 Ra6 39. Re4+ Kxh3 40. f4 f5 41. Re1 exf4 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "8"]
[White "Duin, Laurens"]
[Black "Rossetto, Hector"]
[Result "0-1"]
[ECO "A50"]
[PlyCount "100"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nc6 2. c4 e5 3. d5 Nce7 4. e4 Nf6 5. Nc3 Ng6 6. a3 Bc5 7. Bd3 d6 8. h3 a5 9. Nf3 0-0 10. g3 Bd7 11. Qe2 Bd4 12. Nb5 Bc5 13. Nc3 Qe7 14. Be3 Bxe3 15. Qxe3 Bc8 16. 0-0-0 Nd7 17. h4 Re8 18. h5 Ngf8 19. Nh4 Nc5 20. Bc2 a4 21. Rdf1 h6 22. f4 Nh7 23. Nf3 Bg4 24. Nd2 Nf6 25. f5 c6 26. Rh4 Rec8 27. Kb1 Qd8 28. Rf2 Qb6 29. Nf1 Bxh5 30. Nh2 Ra6 31. Qe1 Qd8 32. Rd2 cxd5 33. Nxd5 Ncd7 34. Nxf6+ Nxf6 35. g4 Rxc4 36. gxh5 Rac6 37. Nf3 Qc7 38. Qe2 b5 39. Rh1 b4 40. axb4 Rxb4 41. Ka2 Qb6 42. Bd3 a3 43. b3 Rxb3 44. Rb1 Rcc3 45. Qd1 Rb2+ 46. Ka1 Qe3 47. Rbxb2 axb2+ 48. Kxb2 Rc8 49. Qe2 Qb6+ 50. Ka1 Rc1+ 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "14"]
[White "Duin, Laurens"]
[Black "Rubinetti, Jorge Alberto"]
[Result "0-1"]
[ECO "B84"]
[PlyCount "68"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 a6 7. 0-0 Nbd7 8. f4 Qc7 9. Kh1 b5 10. a3 Bb7 11. Bf3 Be7 12. Qe2 Nb6 13. e5 dxe5 14. fxe5 Nfd7 15. Bxb7 Qxb7 16. Qg4 h5 17. Qh3 Rf8 18. Bf4 h4 19. Qf3 Qxf3 20. Nxf3 Nc4 21. a4 b4 22. Nd1 Rc8 23. b3 Ncb6 24. Rc1 Nd5 25. Bd2 Rh8 26. Nb2 Nc5 27. Nc4 Ne4 28. Be1 Rh5 29. Nfd2 Nec3 30. Bf2 Rd8 31. Rce1 Rf5 32. Kg1 Nf4 33. Ne4 Nfe2+ 34. Kh1 Nxe4 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "1"]
[White "Duin, Laurens"]
[Black "Sanguineti, Raul"]
[Result "0-1"]
[ECO "B74"]
[PlyCount "72"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 g6 2. e4 c5 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. Be2 0-0 8. Nb3 a5 9. a4 d6 10. 0-0 Be6 11. Nd4 d5 12. exd5 Bxd5 13. Nxd5 Nxd5 14. Nxc6 bxc6 15. Bd4 e5 16. Bc5 Re8 17. c3 Qg5 18. g3 Rad8 19. Qc1 Nf4 20. Kh1 Qf5 21. gxf4 Qe4+ 22. f3 Qxe2 23. Bb6 Rd7 24. Rf2 Qa6 25. Be3 Qd3 26. Qd2 Qf5 27. Qc2 Rd3 28. Bb6 e4 29. Re1 e3 30. Rfe2 Re6 31. Bc7 Qd5 32. Kg2 Rd2 33. Qb1 Qc4 34. Rxd2 exd2 35. Rxe6 Qxe6 36. Kf2 Qd7 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "3"]
[White "Emma, Jaime"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "B77"]
[PlyCount "113"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Bc4 0-0 9. Qd2 Nxd4 10. Bxd4 Be6 11. Nd5 Bxd5 12. exd5 Nd7 13. Bxg7 Kxg7 14. 0-0 Qb6+ 15. Kh1 Rac8 16. Bb3 Nc5 17. Rae1 Rfe8 18. Re2 a5 19. Qd4+ Kg8 20. Rfe1 Qa6 21. h3 a4 22. Bc4 b5 23. Bd3 Nxd3 24. Qxd3 Qb7 25. f4 Rc5 26. Rd1 Qc8 27. Kh2 Qf5 28. Qxf5 gxf5 29. a3 Rc4 30. Kg3 b4 31. axb4 Rxb4 32. c3 Rb3 33. Ra1 Ra8 34. Kh4 Kf8 35. Kg5 a3 36. Rxa3 Raxa3 37. bxa3 Rxa3 38. Rc2 Ra5 39. c4 Kg7 40. Kxf5 e6+ 41. Ke4 exd5+ 42. cxd5 Ra4+ 43. Ke3 Ra3+ 44. Kd4 Ra4+ 45. Rc4 Ra2 46. g4 Rd2+ 47. Ke4 Re2+ 48. Kd3 Rh2 49. Rc3 Rxh3+ 50. Ke4 Rh4 51. Kf5 Rh6 52. Kg5 Rg6+ 53. Kh4 Rh6+ 54. Kg3 Rg6 55. f5 Rf6 56. Kf4 h6 57. Rc1 1-0

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "15"]
[White "Garcia, Raimundo"]
[Black "Duin, Laurens"]
[Result "1/2-1/2"]
[ECO "B77"]
[PlyCount "149"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Bc4 0-0 9. Bb3 Nxd4 10. Bxd4 Be6 11. Qd2 Qa5 12. 0-0-0 b5 13. Kb1 b4 14. Nd5 Bxd5 15. exd5 Qb5 16. Rhe1 a5 17. Qe2 Qxe2 18. Rxe2 a4 19. Bc4 Rfc8 20. b3 Rc7 21. Bb5 axb3 22. cxb3 Rb8 23. Bc4 Nh5 24. Rc2 Bxd4 25. Rxd4 Rc5 26. f4 Nf6 27. g3 Kf8 28. Kb2 Ra5 29. Rcd2 Rba8 30. Kb1 Rc5 31. Be2 Rb8 32. g4 Nd7 33. g5 Rc3 34. R2d3 Rc7 35. Bd1 Nc5 36. Rd2 Ra7 37. Rc2 Ra5 38. Rcc4 Rba8 39. Rxb4 Rxa2 40. Rb8+ Rxb8 41. Kxa2 Rb6 42. b4 Na6 43. Kb3 e6 44. dxe6 Nc5+ 45. Kc4 Nxe6 46. Re4 Nc7 47. Kb3 Ne6 48. Ka4 d5 49. Re5 Nxf4 50. b5 Rb8 51. Ka5 Ne6 52. Rxd5 Nc7 53. Re5 Rxb5+ 54. Rxb5 Nxb5 55. Kxb5 f6 56. gxf6 Kf7 57. Kc5 Kxf6 58. Kd4 Kg5 59. Ke3 Kh4 60. Kf2 Kh3 61. Kg1 g5 62. Bf3 g4 63. Bg2+ Kh4 64. Kf2 Kg5 65. Ke3 h6 66. Ke4 h5 67. Ke3 h4 68. Be4 g3 69. h3 g2 70. Bxg2 Kf6 71. Kd4 Kg7 72. Ke5 Kf7 73. Bd5+ Kg7 74. Kf5 Kh8 75. Kg6 1/2-1/2

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "9"]
[White "Luckis, Marcos"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "E88"]
[PlyCount "87"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 c6 7. Qd2 a6 8. Bd3 e5 9. d5 cxd5 10. cxd5 b5 11. Nge2 Nbd7 12. a4 b4 13. Na2 Nc5 14. Nac1 Nfd7 15. Qxb4 Bh6 16. Bxh6 Qh4+ 17. Ng3 Qxh6 18. Qd2 Qxd2+ 19. Kxd2 a5 20. Nge2 f5 21. Nc3 Nf6 22. Re1 Rb8 23. Bb5 fxe4 24. fxe4 Nh5 25. Ra3 Bg4 26. Ke3 Nf4 27. Rg1 h5 28. Nb3 Nxb3 29. Rxb3 h4 30. h3 Bd7 31. Ra3 Bc8 32. Ne2 g5 33. Rc3 Nxe2 34. Kxe2 Rf4 35. Ke3 g4 36. Rgc1 Bb7 37. Rc7 gxh3 38. gxh3 Rbf8 39. Rg1+ Kh8 40. Rxb7 Rf3+ 41. Kd2 Rxh3 42. Be2 Rh2 43. Rc1 Rg8 44. Rcc7 1-0

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "11"]
[White "Luna, Julio Argentino"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "A41"]
[PlyCount "75"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c4 Bg4 5. Be2 Nc6 6. Be3 e5 7. d5 Bxf3 8. Bxf3 Nd4 9. Bg4 Ne7 10. h4 h5 11. Bh3 0-0 12. Nc3 c5 13. Rc1 f5 14. exf5 Nexf5 15. Bg5 Bf6 16. Ne4 Be7 17. Rc3 a6 18. Bxf5 Nxf5 19. g4 Nxh4 20. Bh6 Rf7 21. gxh5 g5 22. Rg1 Kh7 23. Nxg5+ Bxg5 24. Bxg5 Qg8 25. Rcg3 Nf5 26. Qc2 e4 27. Rg4 Rg7 28. Qe2 Re8 29. Bf6 Rxg4 30. Rxg4 Qf7 31. Rg6 Nd4 32. Qg4 Rg8 33. Rxg8 Qxg8 34. Qxe4+ Kh6 35. Bxd4 cxd4 36. Qe6+ Kh7 37. Qxg8+ Kxg8 38. c5 1-0

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "19"]
[White "Palermo, Vicente"]
[Black "Duin, Laurens"]
[Result "0-1"]
[ECO "E92"]
[PlyCount "81"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 0-0 5. Nf3 d6 6. e4 c5 7. d5 e5 8. Nd2 h6 9. Bh4 Qc7 10. Be2 a6 11. 0-0 Nh7 12. f3 f5 13. Bf2 Nd7 14. a3 Ndf6 15. b4 b6 16. Rb1 Nh5 17. Re1 Bd7 18. Qb3 Rab8 19. Rb2 Nf4 20. Bf1 Qd8 21. Reb1 Qg5 22. Kh1 Nf6 23. Qc2 Rbd8 24. bxc5 bxc5 25. Rb6 Bc8 26. Rc6 Qh5 27. Rbb6 g5 28. Rxd6 Rxd6 29. Rxd6 g4 30. Bxc5 fxe4 31. Ncxe4 Nxe4 32. Nxe4 gxf3 33. g3 f2 34. Qxf2 Nh3 35. Qe2 Bg4 36. Qe1 Rxf1+ 37. Qxf1 Bf3+ 38. Qg2 Bxg2+ 39. Kxg2 Qe2+ 40. Kxh3 Qxe4 41. Rd8+ 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "13"]
[White "Rodriguez, Alberto2222"]
[Black "Duin, Laurens"]
[Result "0-1"]
[ECO "B79"]
[PlyCount "104"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 Bg7 7. Be3 0-0 8. Qd2 Nc6 9. 0-0-0 Nxd4 10. Bxd4 Qa5 11. Kb1 Be6 12. f3 Rfc8 13. a3 Rc6 14. Nd5 Qxd2 15. Rxd2 Bxd5 16. exd5 Rc7 17. c4 Nd7 18. Bxg7 Kxg7 19. f4 Rac8 20. g4 g5 21. fxg5 Ne5 22. b3 b5 23. cxb5 Rc3 24. Rb2 R8c5 25. a4 Rxd5 26. Rc1 Rdc5 27. Rxc3 Rxc3 28. a5 d5 29. Rc2 Rxb3+ 30. Ka2 Rb4 31. Ka3 Rb1 32. Rc7 Ra1+ 33. Kb4 Rb1+ 34. Ka3 Ra1+ 35. Kb3 Rxa5 36. Rxe7 Ng6 37. Rd7 Nf4 38. Kb4 Ra1 39. Re7 Kf8 40. Re3 Re1 41. Ra3 Rxe2 42. Rxa7 Rb2+ 43. Kc5 Ne6+ 44. Kc6 Nd4+ 45. Kc5 Nxb5 46. Rb7 d4 47. h4 d3 48. Rb8+ Ke7 49. Rb7+ Ke6 50. Rb8 d2 51. Rd8 Nc3 52. Kc6 Ke5 0-1

[Event "ARG-ch"]
[Site "Buenos Aires"]
[Date "1965.??.??"]
[Round "21"]
[White "Schweber, Samuel"]
[Black "Duin, Laurens"]
[Result "1-0"]
[ECO "E60"]
[PlyCount "73"]
[EventDate "1965.??.??"]
[EventType "tourn"]
[EventRounds "21"]
[EventCountry "ARG"]
[SourceTitle "MCD"]
[Source "ChessBase"]
[SourceDate "1999.07.01"]
[SourceVersion "1"]
[SourceVersionDate "1999.07.01"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. d4 Bg7 4. c4 0-0 5. Bg2 d6 6. 0-0 Nc6 7. d5 Na5 8. Nfd2 c6 9. Na3 c5 10. Rb1 b6 11. e4 Ne8 12. Nc2 Rb8 13. b4 cxb4 14. Nxb4 Bd7 15. Bb2 b5 16. Bxg7 Nxg7 17. cxb5 Bxb5 18. Re1 f5 19. Nf3 f4 20. Nd4 fxg3 21. hxg3 Bd7 22. Qd3 Rb6 23. a3 Qe8 24. Rbc1 Nb7 25. Qe3 Nc5 26. e5 a5 27. Nbc6 Rb2 28. Re2 Rxe2 29. Qxe2 Nf5 30. Nxf5 Bxf5 31. e6 g5 32. Nxa5 Qa4 33. Nc6 Qxa3 34. Nxe7+ Kh8 35. Qd2 Nd3 36. Rc3 Qa1+ 37. Kh2 1-0

