[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "8"]
[White "Cantero, Ronaldo"]
[Black "Ducas, J."]
[Result "1-0"]
[ECO "A48"]
[PlyCount "47"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d6 3. Nf3 Nbd7 4. Bf4 g6 5. h3 Bg7 6. e3 0-0 7. Be2 c6 8. 0-0 Nh5 9. Bh2 f5 10. Ng5 Ndf6 11. Nc3 h6 12. Nf3 Qe8 13. c5 d5 14. Ne5 Bh8 15. g4 fxg4 16. hxg4 Ng7 17. Qc2 g5 18. Bd3 Ne6 19. f4 Bg7 20. Kg2 Nd7 21. Bg6 Qd8 22. Bh7+ Kh8 23. Ng6+ Kxh7 24. Nxf8+ 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "11"]
[White "Ducas, J."]
[Black "De Freitas, Marcio Elisio"]
[Result "1-0"]
[ECO "D41"]
[PlyCount "83"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. d4 c5 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Qa5 10. a3 Bxd2+ 11. Qxd2 Qxd2+ 12. Kxd2 0-0 13. Bd3 Nc6 14. Rhc1 Rd8 15. Ke3 Na5 16. Rab1 Bd7 17. Rc5 b6 18. Rc7 Be8 19. Rbc1 a6 20. e5 b5 21. R1c3 Kf8 22. Ng5 h6 23. Ne4 Rd7 24. Rxd7 Bxd7 25. Rc7 Bc6 26. Nd6 Bd5 27. Rxf7+ Kg8 28. Rc7 Rb8 29. Be4 Nc4+ 30. Nxc4 bxc4 31. Bg6 Rb3+ 32. Kd2 Kf8 33. Rf7+ Ke8 34. Rb7+ Kd8 35. Rxb3 cxb3 36. Kc3 Kc7 37. f3 a5 38. a4 Kc6 39. Be4 g5 40. g4 h5 41. h3 hxg4 42. hxg4 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "4"]
[White "Ducas, J."]
[Black "Engels, Ludwig"]
[Result "1-0"]
[ECO "B33"]
[PlyCount "109"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nb3 Bb4 7. Bc4 Nxe4 8. Bxf7+ Kxf7 9. Qd5+ Ke8 10. Qxe4 d5 11. Qe2 d4 12. a3 Be7 13. Ne4 Qd5 14. 0-0 Bf5 15. f3 Rd8 16. Qd3 Rf8 17. Bd2 g5 18. Rae1 h6 19. Nc1 Rd7 20. Qe2 Kd8 21. Nd3 Bg6 22. Nef2 Bc5 23. Ne4 b6 24. Bb4 Bxb4 25. axb4 Qb5 26. Qd2 Kc7 27. h4 Rg7 28. hxg5 hxg5 29. g4 Bxe4 30. fxe4 Rh8 31. Kg2 Rh4 32. Kg3 Rgh7 33. Re2 Rh3+ 34. Kf2 Rxd3 35. cxd3 Rh3 36. Rc1 Kb7 37. Rc4 a5 38. Kg2 Rh7 39. Qxg5 Nxb4 40. Qg8 Qd7 41. Rxb4 axb4 42. Qd5+ Ka7 43. Qxd7+ Rxd7 44. Kg3 b3 45. g5 Rc7 46. Kg4 Rc2 47. Kf3 Rc3 48. Rd2 Rc2 49. Rg2 Rc3 50. g6 Rxd3+ 51. Kg4 Rc3 52. g7 Rc8 53. Kf5 Rg8 54. Kxe5 d3 55. Kf6 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "9"]
[White "Ducas, J."]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "A42"]
[PlyCount "81"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 e5 6. Be3 exd4 7. Bxd4 Nc6 8. Be3 0-0 9. Nge2 Ne5 10. Nd4 c6 11. Be2 d5 12. cxd5 cxd5 13. exd5 Nxd5 14. Nxd5 Qxd5 15. Nb5 Qxd1+ 16. Rxd1 Bd7 17. Nxa7 Be6 18. b3 Nc6 19. Nxc6 bxc6 20. 0-0 Rxa2 21. Bc4 Bxc4 22. bxc4 Re8 23. Bf4 Ra4 24. Rfe1 Rxe1+ 25. Rxe1 Bd4+ 26. Kf1 Rxc4 27. Bh6 f5 28. Re7 Rc2 29. Rd7 c5 30. h4 Ra2 31. Bf4 Rb2 32. h5 gxh5 33. Rd5 h4 34. Rxf5 Rf2+ 35. Ke1 Rxg2 36. Bh6 Bg7 37. Bxg7 Kxg7 38. Rxc5 h3 39. Kf1 Kh6 40. Rc4 Kh5 41. Rb4 1/2-1/2

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "7"]
[White "Ducas, J."]
[Black "Rossetto, Hector"]
[Result "0-1"]
[ECO "C92"]
[PlyCount "118"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 0-0 8. c3 d6 9. h3 Na5 10. Bc2 Nd7 11. d4 Bf6 12. Nbd2 Bb7 13. Nf1 Re8 14. Ng3 g6 15. Bh6 exd4 16. Nxd4 Nc4 17. Rb1 c5 18. Nde2 Ndb6 19. Nf4 Bg5 20. Bxg5 Qxg5 21. Qg4 Qxg4 22. hxg4 h6 23. Bb3 Kg7 24. Bxc4 Nxc4 25. f3 a5 26. b3 Nb6 27. a4 bxa4 28. bxa4 Ra6 29. Red1 Bc6 30. Rxd6 Nc4 31. Rd3 Bxa4 32. Rb7 Bc6 33. Rb1 a4 34. Ra1 a3 35. Rdd1 Rb8 36. Nd3 Ra5 37. Nf1 Ba4 38. Rdc1 Bb3 39. Kf2 Rd8 40. Ne1 a2 41. Ke2 Ne5 42. Ne3 Ra7 43. f4 Nc4 44. Nd3 Ra5 45. f5 Nxe3 46. Kxe3 g5 47. c4 Bxc4 48. Rxc4 Ra3 49. Ke2 Raxd3 50. Rxa2 Rg3 51. Kf2 Rxg4 52. Kf3 h5 53. Rxc5 Rd3+ 54. Ke2 Rxg2+ 55. Kxd3 Rxa2 56. e5 Ra4 57. Rd5 h4 58. e6 Kf6 59. exf7 Kxf7 0-1

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "2"]
[White "Ducas, J."]
[Black "Zacharias, Joao"]
[Result "1-0"]
[ECO "C55"]
[PlyCount "81"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 0-0 6. Nbd2 d6 7. Re1 Na5 8. Bb3 Nxb3 9. axb3 g6 10. Nf1 Re8 11. Ng3 Bf8 12. Nd2 Bg7 13. Nc4 h6 14. b4 Bd7 15. Na5 Qc8 16. c4 b6 17. Nb3 c6 18. f4 Bg4 19. Qc2 h5 20. h3 Bd7 21. Qf2 Qd8 22. Rf1 Qe7 23. fxe5 h4 24. Ne2 dxe5 25. Qxh4 Qxb4 26. Bh6 Re6 27. Nd2 Nh5 28. Bg5 Qd6 29. Rf3 f6 30. Be3 Be8 31. Bxb6 c5 32. Ba5 Qa6 33. Ra3 Qb7 34. Bc3 Ra6 35. Rxa6 Qxa6 36. g4 g5 37. Qf2 Nf4 38. Nxf4 gxf4 39. Qxc5 Rd8 40. Qa5 Qc6 41. Qxd8 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "5"]
[White "Eidelman, Mauricio"]
[Black "Ducas, J."]
[Result "0-1"]
[ECO "C50"]
[PlyCount "66"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 d6 6. Nxd4 Be7 7. Nc3 0-0 8. Nxc6 bxc6 9. h3 Be6 10. Qe2 Qc8 11. Ba6 Qb8 12. Rb1 Nd7 13. f4 Nc5 14. Bd3 Nxd3 15. cxd3 Qd8 16. f5 Bc8 17. Rf3 Bf6 18. Bf4 Re8 19. Rbf1 Bxf5 20. Bg5 Bg6 21. Rxf6 gxf6 22. Bxf6 Qc8 23. Qd2 Re6 24. Qg5 Rb8 25. h4 h5 26. Rf4 Rxf6 27. Qxf6 Rxb2 28. g4 Qe6 29. Qd8+ Kg7 30. gxh5 Qe5 31. h6+ Kxh6 32. Qf8+ Kh7 33. h5 Qg5+ 0-1

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "3"]
[White "Hollmann, Jose"]
[Black "Ducas, J."]
[Result "1/2-1/2"]
[ECO "C80"]
[PlyCount "106"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Nxe4 6. Re1 Nc5 7. Bxc6 dxc6 8. Nxe5 Be7 9. d4 Ne6 10. c3 0-0 11. Nd2 c5 12. Ndf3 cxd4 13. cxd4 Qd5 14. Ng4 Bd6 15. h3 Nf4 16. Nge5 Ng6 17. Re3 Bf5 18. Qb3 Qxb3 19. Rxb3 Be6 20. Rc3 Ne7 21. Bd2 Nf5 22. Nc4 Be7 23. Ne3 Bd6 24. d5 Nxe3 25. dxe6 Nd5 26. exf7+ Rxf7 27. Rb3 b6 28. Re1 Raf8 29. Kf1 Bc5 30. Rd3 Nf4 31. Bxf4 Rxf4 32. Red1 g5 33. Rd8 h5 34. Rxf8+ Kxf8 35. Rd2 Be7 36. Ne5 Kg7 37. f3 Bd6 38. Nd3 Ra4 39. b3 Rd4 40. Ke2 Rd5 41. g4 hxg4 42. hxg4 Kf6 43. Ke3 Ba3 44. Rc2 c5 45. Rc4 b5 46. Rc2 Ke6 47. f4 Kf6 48. f5 Rd4 49. Rg2 a5 50. Rg1 a4 51. Rg2 Rd5 52. Ke4 Rd4+ 53. Ke3 Rd5 1/2-1/2

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "1"]
[White "Lisboa, Rui"]
[Black "Ducas, J."]
[Result "1-0"]
[ECO "E32"]
[PlyCount "61"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Nf3 b6 4. Nc3 Bb4 5. Bg5 Bb7 6. Qc2 0-0 7. a3 Bxc3+ 8. Qxc3 c5 9. e3 d6 10. dxc5 dxc5 11. Ne5 h6 12. Rd1 Qe7 13. Bh4 Ne4 14. Bxe7 Nxc3 15. bxc3 Re8 16. Bh4 f6 17. Nd7 Nc6 18. Bxf6 gxf6 19. Nxf6+ Kf7 20. Nxe8 Kxe8 21. Be2 Ne5 22. f4 Nf7 23. Bh5 Ba6 24. Kf2 Ke7 25. Bxf7 Kxf7 26. Rd7+ Kf6 27. e4 Bxc4 28. Rhd1 a5 29. g4 b5 30. h4 h5 31. f5 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "6"]
[White "Rubio Aguado, Fernando"]
[Black "Ducas, J."]
[Result "1-0"]
[ECO "D17"]
[PlyCount "93"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 e6 7. g3 Nbd7 8. Nxc4 Bb4 9. Bg2 Be4 10. f3 Bd5 11. Qd3 0-0 12. 0-0 c5 13. e4 cxd4 14. exd5 exd5 15. Nb5 dxc4 16. Qxc4 Qa5 17. Bf4 Rac8 18. Bc7 a6 19. Qb3 Rxc7 20. Nxc7 Bd6 21. Ne6 Re8 22. Nxd4 Nc5 23. Qc4 Qd2 24. Qc3 Qg5 25. Rfe1 Rd8 26. b4 Nd5 27. f4 Nxc3 28. fxg5 Nd3 29. Re3 Bxb4 30. Rxd3 Rxd4 31. Rxd4 Bc5 32. Kf1 Bxd4 33. Bxb7 a5 34. Re1 Kf8 35. Bc6 f6 36. Re8+ Kf7 37. Rd8 Bc5 38. Rd3 Bb4 39. gxf6 Kxf6 40. Kf2 h6 41. Ke3 Ke5 42. Rd8 Bd6 43. Kd2 Bb4 44. Kc2 Kf6 45. Re8 Kg6 46. Re3 Na2 47. Bd5 1-0

[Event "Sao Paulo"]
[Site "Sao Paulo"]
[Date "1957.??.??"]
[Round "10"]
[White "Sanguineti, Raul"]
[Black "Ducas, J."]
[Result "1-0"]
[ECO "D15"]
[PlyCount "93"]
[EventDate "1957.??.??"]
[EventType "tourn"]
[EventRounds "11"]
[EventCountry "BRA"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. e4 b5 6. e5 Nd5 7. a4 Nxc3 8. bxc3 e6 9. axb5 cxb5 10. Ng5 Bb7 11. Qh5 g6 12. Qg4 h6 13. Ne4 Nd7 14. Be2 h5 15. Qf4 Be7 16. Bf3 a5 17. Nd6+ Bxd6 18. Bxb7 Rb8 19. Bc6 Be7 20. d5 0-0 21. 0-0 exd5 22. Bxd5 Nc5 23. Rd1 Qc8 24. Rxa5 Nd3 25. Qe4 Qg4 26. Qxg4 hxg4 27. e6 f5 28. Be3 Rfd8 29. Bc6 Ne5 30. Bd7 Nxd7 31. Rxd7 Rxd7 32. exd7 Bd8 33. Ra7 Kf7 34. Bf4 Rb6 35. Bg5 Rb8 36. Bf4 Rb6 37. Ra8 Bf6 38. d8Q Bxd8 39. Rxd8 b4 40. cxb4 Rxb4 41. g3 Ra4 42. Rd6 Ra2 43. Rc6 Ra4 44. Kg2 Rb4 45. Bd2 Ra4 46. Bc3 Ra3 47. Rxc4 1-0

