[Event "BRA-ch Regional op"]
[Site "Brazil"]
[Date "2000.??.??"]
[Round "4"]
[White "Boff, Andre Ricardo"]
[Black "Demathe, Joao"]
[Result "1-0"]
[ECO "D30"]
[PlyCount "73"]
[EventDate "2000.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Bg5 Be7 4. Nf3 d5 5. e3 c5 6. Nc3 Nc6 7. Be2 h6 8. Bh4 0-0 9. 0-0 a6 10. dxc5 dxc4 11. Qxd8 Rxd8 12. Bxc4 Nd5 13. Bxe7 Ncxe7 14. Rfd1 Bd7 15. Nxd5 Nxd5 16. Bxd5 exd5 17. Rxd5 Bc6 18. Rxd8+ Rxd8 19. Nd4 Be4 20. f3 Bg6 21. Rc1 f5 22. f4 Bh7 23. c6 bxc6 24. Rxc6 a5 25. Rc5 Rb8 26. b3 a4 27. bxa4 Rb1+ 28. Kf2 Rb2+ 29. Rc2 Rb4 30. a5 Ra4 31. Rc8+ Kf7 32. Ra8 Rxa2+ 33. Kg3 g5 34. a6 Ra3 35. a7 Rxe3+ 36. Kf2 Ra3 37. Nb5 1-0

[Event "BRA-ch Regional op"]
[Site "Brazil"]
[Date "2000.??.??"]
[Round "3"]
[White "Carneiro, Alan"]
[Black "Demathe, Joao"]
[Result "0-1"]
[ECO "D03"]
[PlyCount "65"]
[EventDate "2000.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. e3 d5 5. Be2 h6 6. Bh4 Nbd7 7. Nbd2 0-0 8. 0-0 Re8 9. Ne5 c6 10. f4 Qb6 11. Rb1 c5 12. Bxf6 Nxf6 13. c3 Nd7 14. Bh5 Nxe5 15. fxe5 g6 16. Qg4 Kg7 17. Nf3 Rf8 18. Rf2 Bd7 19. h4 Kh7 20. Ng5+ hxg5 21. hxg5 Bb5 22. g3 Kg7 23. Kg2 Bd3 24. Rg1 Rh8 25. Qf4 Raf8 26. Bf3 Rh7 27. g4 Rfh8 28. Bd1 Rh2+ 29. Qxh2 Rxh2+ 30. Kxh2 cxd4 31. exd4 Bxg5 32. Rf3 Be4 33. Rff1 0-1

[Event "BRA-ch Regional op"]
[Site "Brazil"]
[Date "2000.??.??"]
[Round "5"]
[White "Demathe, Joao"]
[Black "Borges, Guilherme Deola"]
[Result "0-1"]
[ECO "B20"]
[PlyCount "72"]
[EventDate "2000.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. e4 c5 2. g3 Nc6 3. Bg2 g6 4. Nh3 Bg7 5. 0-0 d6 6. f4 e6 7. c3 Nge7 8. d3 0-0 9. Nf2 Bd7 10. Nd2 Qc7 11. Nf3 d5 12. Bd2 Rfd8 13. Qc2 b5 14. Rac1 Qb6 15. Kh1 Rac8 16. Qd1 b4 17. c4 dxc4 18. Rxc4 Na5 19. Rc2 Bb5 20. Be3 Nc4 21. Qe2 Nxe3 22. Qxe3 Bd4 23. Nxd4 cxd4 24. Qd2 Rxc2 25. Qxc2 Rc8 26. Qd2 Qc5 27. Kg1 a5 28. Ng4 Qc2 29. Rd1 a4 30. Bf1 b3 31. a3 f5 32. Ne5 fxe4 33. dxe4 Bxf1 34. Kxf1 Qxe4 35. Qf2 Rc2 36. Qxd4 Qe2+ 0-1

[Event "BRA-ch Regional op"]
[Site "Brazil"]
[Date "2000.??.??"]
[Round "1"]
[White "Dias, Anderson Tatsch"]
[Black "Demathe, Joao"]
[Result "1-0"]
[ECO "D03"]
[WhiteElo "2215"]
[PlyCount "57"]
[EventDate "2000.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2003"]
[Source "ChessBase"]
[SourceDate "2002.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2002.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. Nbd2 d5 5. e3 h6 6. Bf4 0-0 7. Bd3 Bd6 8. Ne5 Nc6 9. c3 Bxe5 10. dxe5 Nd7 11. Qh5 f5 12. Nf3 Qe8 13. Qxe8 Rxe8 14. h4 Nc5 15. Bc2 Re7 16. Nd4 Nd7 17. Nf3 Nc5 18. Nd4 Nd7 19. Nxc6 bxc6 20. 0-0-0 Nb6 21. Rdg1 Ba6 22. g4 fxg4 23. Rxg4 Be2 24. Rg3 Kh8 25. f3 Rd8 26. Bg6 c5 27. Bg5 hxg5 28. hxg5+ Kg8 29. Rgh3 1-0

[Event "Florianopolis op"]
[Site "Florianopolis"]
[Date "1999.??.??"]
[Round "6"]
[White "Demathe, Joao"]
[Black "Oliveira, Denyam Lauth"]
[Result "0-1"]
[ECO "E60"]
[PlyCount "26"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Bf4 d6 5. Nbd2 Nbd7 6. h3 0-0 7. e3 Re8 8. Bd3 e5 9. Bh2 e4 10. Bb1 exf3 11. gxf3 Nf8 12. Bg3 Nh5 13. Ne4 f5 0-1

[Event "Florianopolis op"]
[Site "Florianopolis"]
[Date "1999.??.??"]
[Round "1"]
[White "Martins, Eliseu Colombi"]
[Black "Demathe, Joao"]
[Result "1-0"]
[ECO "A30"]
[PlyCount "79"]
[EventDate "1999.??.??"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2001"]
[Source "ChessBase"]
[SourceDate "2000.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2000.11.22"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 Be7 6. Nc3 0-0 7. b3 Na6 8. Bb2 c5 9. Qc2 Nb4 10. Qb1 Qb8 11. a3 Nc6 12. e3 Rd8 13. Ng5 h6 14. Nge4 Nxe4 15. Nxe4 Na5 16. Qc2 f5 17. Nc3 Bxg2 18. Kxg2 Bf6 19. d3 Nc6 20. Ne2 Qb7 21. f3 Ne5 22. e4 Rf8 23. Rae1 Nxd3 24. Qxd3 Bxb2 25. exf5 Rxf5 26. Nf4 Bxa3 27. Ng6 Rf7 28. Ne5 Re7 29. Qd6 Ree8 30. Nxd7 Rad8 31. Rxe6 Rxe6 32. Qxe6+ Kh8 33. Ne5 Rd2+ 34. Kh3 Qb8 35. Re1 Bb4 36. Nf7+ Kh7 37. Re4 Rd3 38. Rh4 Qb7 39. Ng5+ Kh8 40. Qe8# 1-0

