[Event "BRA-ch sf"]
[Site "Brasilia"]
[Date "1983.03.??"]
[Round "5"]
[White "Costa, Jose Maria Machado"]
[Black "Assumpcao, Roberto"]
[Result "0-1"]
[ECO "C26"]
[PlyCount "40"]
[EventDate "1983.03.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 Nc6 2. g3 e5 3. Bg2 d6 4. d3 Be7 5. Nc3 Nf6 6. Nge2 Bg4 7. Be3 Qd7 8. h3 Be6 9. f4 exf4 10. gxf4 g6 11. Ng3 d5 12. Bf2 Bb4 13. f5 gxf5 14. exf5 Bxf5 15. Nxf5 Qxf5 16. 0-0 Rg8 17. Qe2+ Kd7 18. Bh4 Qxh3 19. Bxf6 Bc5+ 20. d4 Nxd4 0-1

[Event "BRA-ch sf"]
[Site "Brasilia"]
[Date "1983.03.??"]
[Round "1"]
[White "Costa, Jose Maria Machado"]
[Black "Lucena, Lincoln"]
[Result "0-1"]
[ECO "B07"]
[PlyCount "64"]
[EventDate "1983.03.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. f3 Nbd7 4. c4 e5 5. d5 Be7 6. Nc3 Nh5 7. g3 g6 8. Be3 Bg5 9. Qd2 Bxe3 10. Qxe3 h6 11. Nh3 Nb6 12. c5 dxc5 13. Qxc5 Qd6 14. Qxd6 cxd6 15. Nb5 Ke7 16. Rc1 a6 17. Na3 Bd7 18. Nf2 Rac8 19. Rxc8 Rxc8 20. Kd2 f5 21. Be2 Na4 22. Nd1 Nf6 23. Bd3 b5 24. b3 Nc5 25. Nf2 Rf8 26. Re1 fxe4 27. fxe4 Nxd5 28. exd5 Rxf2+ 29. Re2 Nxd3 30. Kxd3 Bf5+ 31. Kd2 Rxe2+ 32. Kxe2 Be4 0-1

[Event "BRA-ch sf"]
[Site "Brasilia"]
[Date "1983.03.??"]
[Round "3"]
[White "Costa, Jose Maria Machado"]
[Black "Ramalhete, Marcelo"]
[Result "1-0"]
[ECO "B03"]
[PlyCount "61"]
[EventDate "1983.03.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Nc6 9. Be3 Be7 10. d5 Nb4 11. Rc1 exd5 12. a3 Nc2+ 13. Rxc2 Bxc2 14. Qxc2 Nxc4 15. Nxd5 Nxe3 16. Nxe3 0-0 17. Bd3 h6 18. 0-0 c6 19. Kh1 Qb6 20. Nc4 Qc7 21. Qe2 Rfe8 22. Qe4 g6 23. Qf4 Bf8 24. Nd6 Re7 25. Bc4 Bg7 26. Nxf7 Kh7 27. N3g5+ hxg5 28. Nxg5+ Kh8 29. Qh4+ Bh6 30. Qxh6+ Rh7 31. Rf8+ 1-0

[Event "BRA-ch sf"]
[Site "Brasilia"]
[Date "1983.03.??"]
[Round "2"]
[White "Lima, Antonio Bento"]
[Black "Costa, Jose Maria Machado"]
[Result "1/2-1/2"]
[ECO "E91"]
[PlyCount "59"]
[EventDate "1983.03.26"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. d5 d6 5. Nc3 Bg7 6. e4 0-0 7. Be2 b5 8. cxb5 a6 9. 0-0 Qa5 10. Bg5 axb5 11. Bxb5 Ba6 12. Bxa6 Qxa6 13. Re1 Nbd7 14. Qc2 h6 15. Bd2 Ng4 16. h3 Nge5 17. Nxe5 Nxe5 18. Nd1 Rfb8 19. Bc3 Nd3 20. Re3 Nb4 21. Qd2 Qa4 22. Bxg7 Kxg7 23. Ra3 Qc2 24. Qxc2 Nxc2 25. Rxa8 Rxa8 26. Rc1 Nd4 27. Nc3 f5 28. f3 Kf6 29. Kf2 f4 30. h4 1/2-1/2

