[Event "Rio Branco Regional Norte"]
[Site "Rio Branco"]
[Date "2021.11.28"]
[Round "6"]
[White "Souza, Neurismar da Rocha"]
[Black "Da Costa, Isaias Nascimento"]
[Result "1/2-1/2"]
[ECO "D04"]
[WhiteElo "1490"]
[BlackElo "1354"]
[PlyCount "104"]
[EventDate "2021.11.25"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. b3 Bf5 4. Bb2 e6 5. e3 Be7 6. Bd3 Nbd7 7. Nbd2 0-0 8. Bxf5 exf5 9. 0-0 Rc8 10. c4 c5 11. dxc5 Bxc5 12. Nd4 Bxd4 13. Bxd4 dxc4 14. Nxc4 a6 15. Qf3 Rc6 16. Qxf5 Re8 17. Rfd1 Qc7 18. Rd2 b5 19. Nb2 h6 20. Rad1 Rc8 21. h3 Rc1 22. Rxc1 Qxc1+ 23. Rd1 Qc6 24. b4 Ra8 25. Bc5 Nxc5 26. Qxc5 Qxc5 27. bxc5 Rc8 28. Rd6 Rxc5 29. Rxa6 Ne4 30. Ra8+ Kh7 31. f3 Nc3 32. Nd3 Rd5 33. Nb4 Rd2 34. e4 Rb2 35. a3 Nb1 36. Nd3 Rb3 37. Nc1 Rxa3 38. Rxa3 Nxa3 39. Nb3 Kg6 40. Kf2 Kf6 41. Ke3 Ke5 42. f4+ Kd6 43. Kd3 b4 44. g4 Kc6 45. h4 Kb5 46. f5 Ka4 47. Nc5+ Kb5 48. Kd4 Nc2+ 49. Kd5 Ne3+ 50. Kd6 Nxg4 51. Nb3 Kc4 52. Na5+ Kc3 1/2-1/2

[Event "Rio Branco Regional Norte"]
[Site "Rio Branco"]
[Date "2021.11.27"]
[Round "4"]
[White "Da Costa, Isaias Nascimento"]
[Black "De Avelar, Flavio Henrique"]
[Result "0-1"]
[ECO "A47"]
[WhiteElo "1354"]
[BlackElo "1534"]
[PlyCount "50"]
[EventDate "2021.11.25"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 c5 3. c3 b6 4. e3 Bb7 5. Nf3 e6 6. Nbd2 Be7 7. Bd3 cxd4 8. cxd4 0-0 9. Rc1 d6 10. 0-0 Nbd7 11. Rc3 Nd5 12. Rc2 Nb4 13. Rc3 Nxd3 14. Rxd3 Ba6 15. Rc3 Bxf1 16. Qxf1 Nf6 17. Qd3 Nd5 18. Rc1 Nxf4 19. exf4 Rc8 20. Rd1 Qc7 21. Rb1 d5 22. Nb3 Qxf4 23. h3 Rc7 24. Qe3 Qxe3 25. fxe3 Rfc8 0-1

[Event "Rio Branco Regional Norte"]
[Site "Rio Branco"]
[Date "2021.11.27"]
[Round "5"]
[White "Oliveira, Nauana da Silva"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1800"]
[BlackElo "1354"]
[PlyCount "38"]
[EventDate "2021.11.25"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. Bf4 Bf5 4. Nc3 e6 5. Nb5 Bd6 6. Nxd6+ cxd6 7. e3 Nc6 8. Bd3 Ne4 9. 0-0 0-0 10. Bxe4 dxe4 11. Nh4 Qxh4 12. Bxd6 Rfd8 13. Bg3 Qe7 14. a3 h6 15. Qh5 Qg5 16. Qe2 Bg4 17. f3 exf3 18. Qf2 Qe7 19. h3 Bh5 0-1

[Event "Rio Branco Regional Norte"]
[Site "Rio Branco"]
[Date "2021.11.25"]
[Round "1"]
[White "Da Costa, Isaias Nascimento"]
[Black "Donadoni, Jonathan Xavier"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1354"]
[BlackElo "1789"]
[PlyCount "66"]
[EventDate "2021.11.25"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 205 Extra"]
[Source "ChessBase"]
[SourceDate "2022.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.01.31"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 e6 3. Nf3 Nf6 4. e3 Nbd7 5. Bd3 Be7 6. Nbd2 Nh5 7. Bg3 Nxg3 8. hxg3 c5 9. c3 Nf6 10. Qc2 h6 11. Ne5 Bd7 12. Ndf3 c4 13. Be2 b5 14. a3 a5 15. g4 Ne4 16. Nd2 Nxd2 17. Qxd2 Rb8 18. Bd1 Bd6 19. f4 Bxe5 20. fxe5 0-0 21. Bc2 Qg5 22. Qe2 f5 23. exf6 Qxf6 24. 0-0-0 Qf2 25. Qxf2 Rxf2 26. g5 hxg5 27. Bg6 Rbf8 28. Rh7 R8f6 29. Bb1 Rf1 30. Rh1 Rxd1+ 31. Rxd1 Be8 32. Rh1 Rf2 33. Rh2 Rf1+ 0-1

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.15"]
[Round "7"]
[White "Orbetelli, Gustavo Perdome M"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1060"]
[BlackElo "1351"]
[PlyCount "32"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2 Nf6 6. Bb5 a6 7. Bxc6+ bxc6 8. Nf3 e6 9. Qf4 Be7 10. e5 dxe5 11. Nxe5 Bd6 12. Qe4 Bxe5 13. Qxe5 0-0 14. Qg3 Nd5 15. Bh6 Qf6 16. Ne4 Qxh6 0-1

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.14"]
[Round "6"]
[White "Da Costa, Isaias Nascimento"]
[Black "Carneiro, Marcos Venicios F"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "1351"]
[BlackElo "1972"]
[PlyCount "42"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d5 3. Nc3 e6 4. Bg5 Be7 5. Nf3 Nbd7 6. e3 a6 7. a3 0-0 8. Be2 dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. 0-0 h6 12. Bh4 c5 13. b3 Rc8 14. Nd2 cxd4 15. Ne2 dxe3 16. fxe3 Qb6 17. Bf2 Ng4 18. Ng3 Nxf2 19. Rxf2 Qxe3 20. Ndf1 Qb6 21. Be2 Bc5 0-1

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.13"]
[Round "5"]
[White "Da Costa, Isaias Nascimento"]
[Black "De Araujo, Antonio Marcos Dini"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "1351"]
[PlyCount "63"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Bf4 d6 5. Nc3 0-0 6. e3 Bg4 7. Be2 Nbd7 8. 0-0 e5 9. Bg5 h6 10. Bh4 Re8 11. dxe5 dxe5 12. Qc2 g5 13. Bg3 Nh5 14. Rad1 Nxg3 15. hxg3 c6 16. Ne4 Bf5 17. Bd3 Qe7 18. Qb3 b6 19. Bc2 Bxe4 20. Bxe4 Nc5 21. Qc2 Rac8 22. Bf5 Rcd8 23. Rxd8 Rxd8 24. Rd1 Rxd1+ 25. Qxd1 Bf6 26. b4 Nb7 27. Qd7 Qxd7 28. Bxd7 c5 29. Bc6 Nd8 30. Bb5 Kf8 31. Kf1 Ke7 32. Ke2 1/2-1/2

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.08"]
[Round "4"]
[White "Frometa, Odannys Azaharez"]
[Black "Da Costa, Isaias Nascimento"]
[Result "1-0"]
[ECO "B53"]
[BlackElo "1351"]
[PlyCount "43"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 Nd7 4. Nc3 Ngf6 5. e5 cxd4 6. Qxd4 dxe5 7. Nxe5 Nxe5 8. Qxe5 e6 9. Bb5+ Bd7 10. Bg5 Be7 11. 0-0-0 0-0 12. Bxf6 Bxf6 13. Qe3 e5 14. Kb1 Bg5 15. Qe1 Qb6 16. Bxd7 Bf6 17. Nd5 Qd6 18. Nxf6+ Qxf6 19. Qe3 Rfd8 20. Bh3 Rd4 21. Rxd4 exd4 22. Qf3 1-0

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.07"]
[Round "3"]
[White "Da Costa, Isaias Nascimento"]
[Black "Oliveira, Nauana da Silva"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "1351"]
[PlyCount "28"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Nbd7 5. Bf4 Qa5 6. Qd2 b6 7. e3 g6 8. Be2 Bg7 9. 0-0 0-0 10. Rab1 Ba6 11. b4 Qa3 12. Rb3 Ne4 13. Rxa3 Nxd2 14. cxd5 Bb7 1-0

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.06"]
[Round "2"]
[White "Barrozo, Pedro Davi Da Silva"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "A34"]
[BlackElo "1351"]
[PlyCount "99"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c4 Nf6 4. Nc3 e6 5. d4 b6 6. Bg5 Be7 7. e5 dxe5 8. dxe5 Nfd7 9. Bxe7 Qxe7 10. Bd3 Bb7 11. 0-0 Nc6 12. Re1 0-0 13. Qc2 g6 14. Be4 Rab8 15. Bxc6 Bxc6 16. Qd3 Rfd8 17. Qe3 Rb7 18. b3 Nb8 19. Rad1 Rbd7 20. Rxd7 Rxd7 21. Ne4 Bxe4 22. Qxe4 Qd8 23. Qh4 Qxh4 24. Nxh4 Rd2 25. a4 Rb2 26. h3 Rxb3 27. Rd1 Nc6 28. Nf3 Rb4 29. Rd7 Rxa4 30. Ng5 Nxe5 31. Re7 a5 32. f4 Nd3 33. Rxf7 Ra1+ 34. Kh2 Rf1 35. Rb7 a4 36. Rxb6 a3 37. Ra6 Ra1 38. Nxe6 a2 39. Kg3 Nb4 40. Ra8+ Kf7 41. Nxc5 Rb1 42. Rxa2 Nxa2 43. Ne4 Rc1 44. c5 Nb4 45. Kg4 Nd5 46. f5 gxf5+ 47. Kxf5 Ke7 48. Ke5 Nc7 49. g3 Na6 50. Kd5 0-1

[Event "Rio Branco Acreano op"]
[Site "Rio Branco"]
[Date "2021.08.05"]
[Round "1"]
[White "Da Costa, Isaias Nascimento"]
[Black "Donadoni, Jonathan Xavier"]
[Result "0-1"]
[ECO "E41"]
[WhiteElo "1351"]
[PlyCount "34"]
[EventDate "2021.08.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 d5 5. Nf3 c5 6. Be2 Nc6 7. 0-0 0-0 8. a3 Bxc3 9. bxc3 a6 10. a4 Qc7 11. Ba3 Rd8 12. Bxc5 dxc4 13. Bxc4 b6 14. Ba3 Nxd4 15. Nxd4 Qxc4 16. Rc1 Qd5 17. Qd3 Bb7 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.14"]
[Round "5.5"]
[White "Da Costa, Isaias Nascimento"]
[Black "Peixoto, Luis Fernando de Ol"]
[Result "0-1"]
[ECO "D37"]
[BlackElo "1676"]
[PlyCount "96"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. e3 0-0 6. cxd5 Nxd5 7. Bc4 Nxc3 8. bxc3 c5 9. 0-0 cxd4 10. cxd4 b6 11. Qc2 Bb7 12. Be2 Nd7 13. Rb1 Rc8 14. Qd3 Nf6 15. Ba3 Be4 16. Bxe7 Bxd3 17. Bxd8 Bxb1 18. Bxf6 Bxa2 19. Ba6 gxf6 20. Bxc8 Rxc8 21. h3 Bd5 22. Ra1 Bxf3 23. gxf3 a5 24. Rb1 Rb8 25. Kf1 b5 26. Ke2 a4 27. Kd2 b4 28. Kc2 a3 29. Kb3 Kg7 30. Rg1+ Kh8 31. h4 h5 32. Rc1 Rb7 33. Rc5 f5 34. e4 fxe4 35. fxe4 Kg7 36. Rxh5 Kg6 37. Rc5 Rb6 38. f4 Ra6 39. Rc1 Kh5 40. Kxb4 a2 41. Ra1 Kxh4 42. Kb3 Kg4 43. Rxa2 Rxa2 44. Kxa2 Kxf4 45. Kb3 Kxe4 46. Kc4 f5 47. Kc3 Ke3 48. Kc4 f4 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.14"]
[Round "6.9"]
[White "Orbetelli, Gustavo Perdome M"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C47"]
[PlyCount "58"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d3 Nc6 4. Nc3 Be7 5. Bd2 0-0 6. g3 d6 7. Nd5 Bg4 8. Nxe7+ Qxe7 9. Bg2 Nd4 10. 0-0 Nxf3+ 11. Bxf3 Bh3 12. Re1 Nd7 13. Qe2 f5 14. Be3 f4 15. Bd2 fxg3 16. fxg3 Qf6 17. Bg2 Bxg2 18. Qxg2 Rf7 19. Rf1 Qe7 20. Rxf7 Qxf7 21. Rf1 Qxa2 22. Bc3 Rf8 23. Rxf8+ Nxf8 24. d4 exd4 25. Bxd4 c5 26. Bc3 b5 27. b4 Qb1+ 28. Qf1 Qxc2 29. Qxb5 Qxc3 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.13"]
[Round "3.8"]
[White "Da Costa, Isaias Nascimento"]
[Black "Felix, Luiza de Oliveira"]
[Result "0-1"]
[ECO "D32"]
[BlackElo "1584"]
[PlyCount "52"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 cxd4 6. Nxd4 Nc6 7. Nf3 Bc5 8. cxd5 exd5 9. Be2 0-0 10. 0-0 Bf5 11. b3 a6 12. Bb2 b5 13. Bd3 Ne4 14. Qc2 Nb4 15. Qb1 Nxc3 16. Bxc3 Bxd3 17. Qd1 Bxf1 18. Qxf1 Qe7 19. a3 Nc2 20. Ra2 Nxe3 21. Qe2 Ng4 22. Qxe7 Bxe7 23. h3 Nf6 24. b4 Ne4 25. Bd4 Bf6 26. Bc5 Rfe8 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.13"]
[Round "4.10"]
[White "Da Silva, Manoel Zuza"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "57"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Be7 5. 0-0 0-0 6. d4 exd4 7. Nxd4 d6 8. Re1 Bg4 9. Qd2 Re8 10. Bb5 Bd7 11. Nf5 Bxf5 12. exf5 Qd7 13. Qd3 a6 14. Bc4 b5 15. Bb3 Rad8 16. Nd5 Nxd5 17. Qxd5 Bf6 18. Kf1 Rxe1+ 19. Kxe1 Re8+ 20. Kf1 Re5 21. Qf3 Rxf5 22. Qh3 Nb8 23. c3 Re5 24. Qg3 b4 25. Bd2 bxc3 26. Bxc3 Qb5+ 27. Kg1 Rg5 28. Re1 Rxg3 29. hxg3 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.12"]
[Round "1.3"]
[White "Da Costa, Isaias Nascimento"]
[Black "Neto, Antonio Alves Leita"]
[Result "0-1"]
[ECO "A52"]
[BlackElo "1949"]
[PlyCount "42"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. Bf4 g5 5. Bg3 Bg7 6. Nf3 Nc6 7. Nbd2 Ngxe5 8. e3 Nxf3+ 9. Nxf3 Bxb2 10. Rb1 Bc3+ 11. Nd2 d6 12. Bd3 h5 13. h3 Qf6 14. 0-0 Be5 15. Ne4 Qg7 16. Qf3 f5 17. Nd2 g4 18. hxg4 hxg4 19. Bxe5 Nxe5 20. Qd5 Qh6 21. Rfe1 Qh1# 0-1

[Event "Rio Granco ACRE 1st U2000"]
[Site "Rio Granco"]
[Date "2019.07.12"]
[Round "2.11"]
[White "Neri, Joao Emanuel Silva"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "48"]
[EventDate "2019.07.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Bc5 5. d3 Ng4 6. Qe2 Nxf2 7. Rf1 Ng4 8. h3 Nf6 9. g4 0-0 10. a3 Nd4 11. Nxd4 Bxd4 12. Nd5 Nxd5 13. Bxd5 c6 14. Bb3 Qh4+ 15. Kd1 Qxh3 16. c3 d5 17. cxd4 Bxg4 18. exd5 Qxf1+ 19. Kd2 Qxe2+ 20. Kc3 Bf5 21. dxe5 Qxd3+ 22. Kb4 Qd4+ 23. Ka5 Qb6+ 24. Ka4 Qb5# 0-1

[Event "Rio Branco op 2nd"]
[Site "Rio Branco"]
[Date "2019.04.21"]
[Round "6"]
[White "Da Costa, Isaias Nascimento"]
[Black "Da Silva, Icaro Moreira"]
[Result "1-0"]
[ECO "D51"]
[WhiteElo "1768"]
[PlyCount "51"]
[EventDate "2019.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. Nf3 Nbd7 6. e3 h6 7. Bh4 c5 8. Ne5 Nxe5 9. dxe5 d4 10. exd4 cxd4 11. exf6 Qd7 12. Ne4 Bb4+ 13. Ke2 Qc6 14. Qd3 e5 15. fxg7 Rg8 16. Nf6+ Qxf6 17. Bxf6 Bg4+ 18. f3 e4 19. Qxe4+ Kd7 20. Qxg4+ Kd6 21. Qxd4+ Kc6 22. Qd5+ Kb6 23. Qb5+ Kc7 24. Be5+ Kd8 25. Rd1+ Kc8 26. Qd7# 1-0

[Event "Rio Branco op 2nd"]
[Site "Rio Branco"]
[Date "2019.04.21"]
[Round "5"]
[White "Teramoto, Anderson"]
[Black "Da Costa, Isaias Nascimento"]
[Result "1-0"]
[ECO "D42"]
[WhiteElo "1667"]
[BlackElo "1768"]
[PlyCount "49"]
[EventDate "2019.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. e3 c5 5. Nf3 cxd4 6. exd4 Be7 7. Bd3 0-0 8. 0-0 Nc6 9. a3 b6 10. Re1 Bb7 11. cxd5 Nxd5 12. Bd2 Bf6 13. Nxd5 Qxd5 14. Be4 Qd7 15. Bc3 Rad8 16. Qc2 g6 17. Rad1 Qc7 18. d5 Bxc3 19. Qxc3 exd5 20. Bxd5 Rd7 21. Ba2 Ne7 22. Rxd7 Qxd7 23. Ne5 Qd6 24. Ng4 Bd5 25. Nh6# 1-0

[Event "Rio Branco op 2nd"]
[Site "Rio Branco"]
[Date "2019.04.20"]
[Round "3"]
[White "Da Costa, Isaias Nascimento"]
[Black "De Oliveira, Creuziane Santos"]
[Result "1-0"]
[ECO "D21"]
[WhiteElo "1768"]
[PlyCount "31"]
[EventDate "2019.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e4 e6 4. Nf3 Bb4+ 5. Nc3 Bxc3+ 6. bxc3 Nf6 7. Bg5 0-0 8. e5 Bd7 9. exf6 Nc6 10. Qd2 Na5 11. fxg7 Qe8 12. gxf8Q+ Kxf8 13. Qf4 e5 14. Qf6 e4 15. Bh6+ Kg8 16. Qg7# 1-0

[Event "Rio Branco op 2nd"]
[Site "Rio Branco"]
[Date "2019.04.19"]
[Round "1"]
[White "Da Costa, Isaias Nascimento"]
[Black "Da Silva, Ricardo Moura"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "1768"]
[BlackElo "1903"]
[PlyCount "112"]
[EventDate "2019.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. e3 0-0 5. Be2 d6 6. 0-0 Nbd7 7. Nbd2 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. b3 Qe7 11. Bb2 Rd8 12. Qc2 e4 13. Rad1 Bf5 14. Bxf6 Bxf6 15. Nb1 h5 16. Nc3 c6 17. Rxd8+ Rxd8 18. Rd1 Re8 19. Qd2 Be5 20. f4 exf3 21. Bxf3 Bxc3 22. Qxc3 Qxe3+ 23. Qxe3 Rxe3 24. Rd8+ Kg7 25. Ra8 a6 26. Ra7 Bc8 27. Ra8 Bg4 28. Kf2 Re7 29. Bxg4 hxg4 30. Rd8 Kf6 31. Rd4 Kg5 32. g3 f6 33. h4+ gxh3 34. Rh4 Rd7 35. Ke3 f5 36. Rxh3 Kg4 37. Rh6 Rd6 38. Rh7 b5 39. c5 Re6+ 40. Kf2 a5 41. a3 Re5 42. Rg7 g5 43. Ra7 Rxc5 44. Rxa5 Rc2+ 45. Kf1 Kxg3 46. a4 Kf3 47. Ke1 g4 48. axb5 cxb5 49. Rxb5 f4 50. Rd5 Kg2 51. Rd4 Kg3 52. Rd3+ f3 53. b4 Rb2 54. b5 Rxb5 55. Kf1 Rb1+ 56. Rd1 Rxd1# 0-1

[Event "Rio Branco op 2nd"]
[Site "Rio Branco"]
[Date "2019.04.19"]
[Round "2"]
[White "Da Silva, Manoel Zuza"]
[Black "Da Costa, Isaias Nascimento"]
[Result "1-0"]
[ECO "B30"]
[BlackElo "1768"]
[PlyCount "45"]
[EventDate "2019.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 190 Extra"]
[Source "ChessBase"]
[SourceDate "2019.07.15"]
[SourceVersion "1"]
[SourceVersionDate "2019.07.15"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. Bc4 e6 5. 0-0 Nf6 6. d3 d5 7. exd5 Nxd5 8. Bb5 Qc7 9. Qe2 Nxc3 10. bxc3 Be7 11. d4 0-0 12. Bd3 b6 13. Bb2 Bb7 14. Rab1 Rab8 15. Qe4 g6 16. Qg4 Na5 17. Qh3 Bxf3 18. gxf3 Qf4 19. Kh1 Nc6 20. dxc5 Bxc5 21. Rbe1 Ne5 22. Be4 Rbd8 23. Bc1 1-0

[Event "Rio Branco Acre op 3rd"]
[Site "Rio Branco"]
[Date "2018.09.09"]
[Round "6"]
[White "De Ferreira, Lavinia Vitoria"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C50"]
[BlackElo "1762"]
[PlyCount "66"]
[EventDate "2018.09.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 4. d3 Bc5 5. Be3 Bb6 6. c3 Nf6 7. d4 exd4 8. cxd4 Nxe4 9. Nbd2 d5 10. Bd3 Bf5 11. 0-0 0-0 12. Bb5 Nb4 13. Qe2 c6 14. Bd3 Ba5 15. a3 Nxd2 16. Bxd2 Bxd3 17. Qe1 Nc2 18. Qd1 Bxf1 19. Kxf1 Nxa1 20. g3 Nb3 21. Bc3 Qb6 22. h4 Qb5+ 23. Kg2 Rfe8 24. Bxa5 Nxa5 25. b4 Nc4 26. a4 Qxb4 27. Ne5 Nxe5 28. dxe5 Qc4 29. f4 Qa2+ 30. Kh3 f6 31. Kg4 f5+ 32. Kh5 d4 33. Qxd4 Qf7# 0-1

[Event "Rio Branco Acre op 3rd"]
[Site "Rio Branco"]
[Date "2018.09.08"]
[Round "4"]
[White "Soares, Rubens de Deus"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C46"]
[BlackElo "1762"]
[PlyCount "38"]
[EventDate "2018.09.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Be2 d6 5. Na4 Nd4 6. Nxc5 Nxf3+ 7. Bxf3 dxc5 8. d3 Bd7 9. Be3 b6 10. Qd2 Nf6 11. 0-0 Bg4 12. h3 Bxf3 13. gxf3 0-0 14. c4 Nh5 15. a3 Qh4 16. Rad1 Qxh3 17. Qc3 Rfe8 18. Bg5 Nf4 19. Qd2 Qg2# 0-1

[Event "Rio Branco Acre op 3rd"]
[Site "Rio Branco"]
[Date "2018.09.07"]
[Round "3"]
[White "Da Costa, Isaias Nascimento"]
[Black "Neves, Luiz Augusto Moraes"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1762"]
[BlackElo "1768"]
[PlyCount "19"]
[EventDate "2018.09.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Bc4 d6 3. Nf3 Nf6 4. 0-0 e6 5. d3 Be7 6. Bf4 0-0 7. Re1 Nc6 8. e5 dxe5 9. Nxe5 Nd4 10. Nc3 0-1

[Event "Rio Branco Acre op 3rd"]
[Site "Rio Branco"]
[Date "2018.09.07"]
[Round "2"]
[White "Da Silva, Samuel Pereira"]
[Black "Da Costa, Isaias Nascimento"]
[Result "0-1"]
[ECO "C44"]
[BlackElo "1762"]
[PlyCount "23"]
[EventDate "2018.09.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. d3 Nc6 3. Nf3 Qf6 4. Nc3 Bc5 5. Be2 d6 6. Nd5 Qg6 7. h4 Rb8 8. Kf1 Nf6 9. Nxc7+ Kd8 10. Nd5 Bd7 11. Bg5 a6 12. h5 0-1

[Event "Rio Branco Acre op 3rd"]
[Site "Rio Branco"]
[Date "2018.09.06"]
[Round "1"]
[White "Da Costa, Isaias Nascimento"]
[Black "Dantas, Neimar de Oliveira"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1762"]
[BlackElo "2019"]
[PlyCount "48"]
[EventDate "2018.09.06"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 c5 2. Bc4 e6 3. Nf3 Nc6 4. 0-0 Nf6 5. d3 Be7 6. e5 Ng4 7. Qe2 Qc7 8. h3 Ngxe5 9. Bf4 Bd6 10. Re1 Nxf3+ 11. Qxf3 Bxf4 12. Re4 Be5 13. Qe3 Bxb2 14. Qg5 Bxa1 15. Rg4 Qb6 16. Qxg7 Bxg7 17. Rxg7 Qxb1+ 18. Kh2 Qxc2 19. Bb3 Qxd3 20. Rg3 Qd6 21. h4 Rg8 22. Bc2 f5 23. Kg1 Rxg3 24. fxg3 Qxg3 0-1

