[Event "Florianopolis op 09"]
[Site "Florianopolis"]
[Date "2021.09.26"]
[Round "5"]
[White "Da Silva, Matheus Lopes"]
[Black "Leffeck, Mateus Bernal"]
[Result "1/2-1/2"]
[ECO "B15"]
[WhiteElo "1619"]
[BlackElo "1766"]
[PlyCount "178"]
[EventDate "2021.09.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Nf3 Bd6 7. Be2 0-0 8. 0-0 Re8 9. Re1 Be6 10. Be3 Nd7 11. c3 Qc7 12. Rc1 b5 13. c4 b4 14. d5 Bg4 15. dxc6 Ne5 16. h3 Nxf3+ 17. Bxf3 Bxf3 18. Qxf3 Rac8 19. Red1 Be5 20. Rd2 Qxc6 21. Qxc6 Rxc6 22. b3 Bc3 23. Rd7 Ra6 24. Rxa7 Rxa7 25. Bxa7 Ra8 26. Rd1 Kf8 27. Rd7 Ke8 28. Rb7 Be5 29. g3 g6 30. Bc5 Rxa2 31. Rxb4 Kd7 32. Kg2 Kc6 33. Be3 Bd6 34. Rb6+ Kc7 35. c5 Be5 36. Bf4 Bxf4 37. gxf4 f5 38. b4 Rb2 39. Kg3 Rb1 40. Rf6 Rxb4 41. Rxf7+ Kc6 42. Rxh7 Kxc5 43. Rg7 Rb1 44. Re7 Kd6 45. Re3 Rb8 46. Kh4 Rb2 47. Rg3 Rxf2 48. Rxg6+ Ke7 49. Kg5 Ra2 50. Kxf5 Ra5+ 51. Kg4 Kf7 52. Rg5 Ra8 53. h4 Kf6 54. h5 Rh8 55. Rg6+ Kf7 56. Kg5 Rb8 57. h6 Rb1 58. Rg7+ Kf8 59. f5 Rg1+ 60. Kf6 Rh1 61. Rg6 Rh2 62. Kg5 Rg2+ 63. Kh4 Rh2+ 64. Kg3 Rh5 65. Kf4 Kf7 66. Ke5 Rh1 67. Rf6+ Ke7 68. Re6+ Kf7 69. Kd6 Rd1+ 70. Kc7 Rh1 71. Kd7 Rd1+ 72. Rd6 Rf1 73. h7 Rh1 74. Kd8 Kg7 75. f6+ Kf7 76. Kc7 Rc1+ 77. Kd7 Rh1 78. Kc6 Kg6 79. Kd5 Rxh7 80. Ke6 Rf7 81. Ke5 Ra7 82. Rd4 Kf7 83. Rd5 Rb7 84. Kf5 Ra7 85. Kg5 Rb7 86. Rf5 Rb6 87. Rf4 Rb5+ 88. Rf5 Rxf5+ 89. Kxf5 Kf8 1/2-1/2

[Event "Florianopolis op 09"]
[Site "Florianopolis"]
[Date "2021.09.26"]
[Round "6"]
[White "Leffeck, Mateus Bernal"]
[Black "Silva, Guilherme Henrique"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1766"]
[BlackElo "1913"]
[PlyCount "94"]
[EventDate "2021.09.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Bb4 7. Nde2 Nf6 8. a3 Be7 9. f3 0-0 10. Qd2 Rd8 11. 0-0-0 d5 12. e5 Nfd7 13. f4 b5 14. g4 Nc6 15. h4 Nb6 16. Bxb6 Qxb6 17. Nd4 Nxd4 18. Qxd4 Bc5 19. Qd3 Be3+ 20. Kb1 Bxf4 21. Ne4 Qe3 22. Ng5 Qxd3 23. Bxd3 h6 24. Nf3 Bb7 25. Rhe1 Kf8 26. h5 Ke7 27. Nd4 Rg8 28. Re2 g5 29. b4 Rgf8 30. Rde1 Bc8 31. Kb2 f6 32. exf6+ Rxf6 33. Nxe6 Kd6 34. Bf5 Bg3 35. Rg1 Be5+ 36. Rxe5 Kxe5 37. Re1+ Kd6 38. Nd4 Bd7 39. Bxd7 Kxd7 40. Nf5 Re8 41. Rxe8 Kxe8 42. Kc3 Rxf5 43. gxf5 Ke7 44. Kd4 Kf6 45. Kxd5 Kxf5 46. Kd4 Kf4 47. Kd3 Kf3 0-1

[Event "Florianopolis op 09"]
[Site "Florianopolis"]
[Date "2021.09.25"]
[Round "3"]
[White "Calcado, Acyr Rogerio"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B14"]
[WhiteElo "2102"]
[BlackElo "1766"]
[PlyCount "113"]
[EventDate "2021.09.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. cxd5 Nxd5 8. Bd2 Nc6 9. Bd3 0-0 10. 0-0 Nce7 11. Qe2 Bd7 12. Ne5 Rc8 13. Rac1 Bc6 14. Nxc6 Nxc6 15. Be3 Be7 16. Rfd1 Bf6 17. Bb1 Re8 18. Ne4 Be7 19. a3 f5 20. Nc5 Bxc5 21. dxc5 Qf6 22. Qd2 Nxe3 23. fxe3 Rcd8 24. Qe2 Qe5 25. Re1 Rd5 26. Qb5 Re7 27. e4 Qd4+ 28. Kh1 a6 29. Qb3 Rxc5 30. Rcd1 Qc4 31. Qxc4 Rxc4 32. exf5 Rf4 33. fxe6 g6 34. Be4 Kg7 35. Rd6 Na5 36. g3 Rf2 37. b4 Nc4 38. Rd7 Rxd7 39. exd7 Rd2 40. Rc1 b5 41. a4 Rxd7 42. axb5 axb5 43. Bc6 Rd2 44. Bxb5 Na3 45. Rc7+ Kf6 46. Be8 h6 47. Rc6+ Ke5 48. Rxg6 Ke4 49. Bc6+ Ke3 50. Re6+ Kf2 51. Rf6+ Ke1 52. Kg1 Rb2 53. b5 Rb4 54. Re6+ Kd2 55. Rxh6 Nxb5 56. Bxb5 Rxb5 57. Re6 1-0

[Event "Florianopolis op 09"]
[Site "Florianopolis"]
[Date "2021.09.25"]
[Round "4"]
[White "Leffeck, Mateus Bernal"]
[Black "Campos, Anna Carolina"]
[Result "1-0"]
[ECO "A66"]
[WhiteElo "1766"]
[BlackElo "1624"]
[PlyCount "101"]
[EventDate "2021.09.24"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 e6 5. e4 exd5 6. cxd5 g6 7. f4 Bg4 8. Qb3 Qe7 9. h3 Nxe4 10. Qa4+ Bd7 11. Qxe4 Qxe4+ 12. Nxe4 Be7 13. Nf3 0-0 14. Kf2 f5 15. Neg5 Bf6 16. a4 Re8 17. Bc4 Na6 18. Bxa6 bxa6 19. h4 h6 20. Nh3 Rab8 21. Ra2 Re4 22. a5 Rb3 23. g3 Bb5 24. Re1 Bd4+ 25. Nxd4 cxd4 26. Rxe4 fxe4 27. Ra3 e3+ 28. Ke1 Rb4 29. Ng1 Rc4 30. Kd1 Bd7 31. Bxe3 dxe3 32. Rxe3 Rd4+ 33. Kc2 Kf7 34. Kc3 Rxd5 35. b4 Bg4 36. Ne2 Bxe2 37. Rxe2 h5 38. Re3 Rd1 39. Kc2 Rd4 40. Kb3 d5 41. Rc3 Kf6 42. Rc6+ Kf5 43. Rxa6 Rd3+ 44. Kc2 Rxg3 45. Rxa7 d4 46. b5 Ke4 47. Re7+ Kd5 48. b6 Rg2+ 49. Kd3 Rg3+ 50. Kd2 Rb3 51. b7 1-0

[Event "Florianopolis op 09"]
[Site "Florianopolis"]
[Date "2021.09.25"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "Da Cunha, Gastao"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1766"]
[BlackElo "1576"]
[PlyCount "47"]
[EventDate "2021.09.24"]
[EventType "swiss"]
[EventRounds "6"]
[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 Bf5 4. cxd5 cxd5 5. Qb3 Nf6 6. Qxb7 Nbd7 7. Nxd5 Nxd5 8. Qxd5 e6 9. Qb3 Rb8 10. Qd1 Bb4+ 11. Bd2 Qa5 12. b3 Nf6 13. f3 0-0 14. Bxb4 Qxb4+ 15. Qd2 Qa3 16. e4 Rxb3 17. exf5 exf5 18. axb3 Qxa1+ 19. Kf2 f4 20. Bc4 Re8 21. g3 fxg3+ 22. hxg3 h6 23. Rh2 g5 24. Rxh6 1-0

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.04"]
[Round "6"]
[White "Decezare, Jucian Kaue"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1601"]
[BlackElo "1736"]
[PlyCount "56"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 Bg4 7. Qb3 Qd7 8. Nd2 a6 9. Ngf3 Bxf3 10. Nxf3 e6 11. 0-0 Be7 12. Rfe1 0-0 13. Qc2 h6 14. Rad1 Bd6 15. Ne5 Qc7 16. Qd2 Ng4 17. Nxg4 Bxf4 18. Qe2 b5 19. g3 Bg5 20. h4 Be7 21. a4 bxa4 22. Ra1 a3 23. bxa3 Na5 24. Bxa6 Nb3 25. Ra2 Qxc3 26. Rc2 Qa5 27. Bd3 Nxd4 28. Qe3 Qxe1+ 0-1

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.03"]
[Round "4"]
[White "Freitas, Ronan Cunha"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1871"]
[BlackElo "1736"]
[PlyCount "55"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 dxc4 4. e3 b5 5. a4 Nf6 6. b3 cxb3 7. axb5 Bd7 8. Qxb3 Qb6 9. Nbd2 e6 10. Nc4 Qb7 11. Ba3 cxb5 12. Bxf8 Kxf8 13. Nce5 Qd5 14. Qa3+ b4 15. Qxb4+ Kg8 16. Rxa7 Na6 17. Rxa8+ Qxa8 18. Qa5 Qc8 19. Be2 Nb8 20. Nxf7 Nc6 21. Qa3 Qb8 22. Nxh8 Qb1+ 23. Bd1 Kxh8 24. 0-0 h6 25. Ne5 Nxe5 26. dxe5 Nd5 27. Qf8+ Kh7 28. Bh5 1-0

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.03"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Mariot Vaz, Joao Antonio Bertol"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "1736"]
[BlackElo "1511"]
[PlyCount "105"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. f4 Nf6 2. Nf3 d5 3. g3 g6 4. Bg2 Bg7 5. 0-0 0-0 6. d3 c5 7. Nbd2 d4 8. Nc4 Nc6 9. e4 dxe3 10. c3 Bf5 11. Ne1 Ng4 12. Nxe3 Nxe3 13. Bxe3 Qd6 14. Qe2 Rad8 15. Rd1 Rfe8 16. Qf2 b6 17. h3 e5 18. g4 Bc8 19. Bxc6 Qxc6 20. fxe5 Bb7 21. Qxf7+ Kh8 22. Qf3 Qc7 23. Qg3 Bxe5 24. Bf4 Qg7 25. Bxe5 Rxe5 26. Rf2 Rde8 27. Ng2 Qc7 28. Kh2 Qc6 29. Rdf1 Qd5 30. c4 Qd6 31. Rf8+ Rxf8 32. Rxf8+ Qxf8 33. Qxe5+ Kg8 34. Nf4 Qf7 35. Qe6 Qxe6 36. Nxe6 Bf3 37. g5 Kf7 38. Nf4 Ke7 39. Kg3 Bd1 40. Ng2 Be2 41. Ne1 Ke6 42. Kf4 a6 43. Ke4 Bf1 44. h4 Be2 45. Ng2 Bg4 46. Nf4+ Kd6 47. d4 Bf5+ 48. Ke3 cxd4+ 49. Kxd4 Bg4 50. Nd5 b5 51. cxb5 axb5 52. Nf6 Be6 53. a3 1-0

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.02"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Soares, Gustavo Henrique"]
[Result "0-1"]
[ECO "E14"]
[WhiteElo "1736"]
[BlackElo "1880"]
[PlyCount "68"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 4. Nc3 d5 5. e3 e6 6. Be2 dxc4 7. Qa4+ Nbd7 8. 0-0 a6 9. Qxc4 b5 10. Qb3 Bd6 11. Bd2 0-0 12. Qc2 e5 13. dxe5 Nxe5 14. e4 b4 15. Nd5 Nxd5 16. exd5 Bxd5 17. Nxe5 Bxe5 18. Bxb4 Qh4 19. f4 Bxf4 20. Rxf4 Qxf4 21. Bxf8 Qe3+ 22. Kf1 Rxf8 23. Bxa6 Qh6 24. Bc4 Qf4+ 25. Kg1 Qd4+ 26. Kh1 Qxc4 27. Qxc4 Bxc4 28. a4 Rb8 29. a5 Rxb2 30. Rd1 g6 31. g3 Ra2 32. Kg1 Rxa5 33. Rc1 Ra4 34. Kf2 c6 0-1

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.02"]
[Round "2"]
[White "Tomiello, Lucas Costamilan"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "C05"]
[WhiteElo "2114"]
[BlackElo "1736"]
[PlyCount "67"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 b6 6. g3 Ba6 7. Bg2 c5 8. Ndf3 Nc6 9. c3 Be7 10. Ne2 Rc8 11. 0-0 0-0 12. Rf2 Qc7 13. Be3 f5 14. Rc1 cxd4 15. Nexd4 Nd8 16. b4 Bc4 17. h3 Kh8 18. g4 g6 19. g5 a5 20. a3 axb4 21. axb4 Ra8 22. h4 Kg7 23. h5 Kf7 24. Bh1 Nc6 25. Rh2 Rh8 26. Ra1 Ndxe5 27. fxe5 Nxe5 28. Rxa8 Rxa8 29. hxg6+ hxg6 30. Qe1 Nxf3+ 31. Bxf3 Qe5 32. Rh7+ Ke8 33. Rxe7+ Kf8 34. Rxe6 1-0

[Event "BRA-ch U18"]
[Site "Florianopolis"]
[Date "2021.07.01"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Silva, Kaua Marques"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "1736"]
[BlackElo "2160"]
[PlyCount "113"]
[EventDate "2021.07.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Ne2 Nf6 4. Nbc3 e6 5. g3 d5 6. exd5 exd5 7. cxd5 Ne5 8. Bg2 Nd3+ 9. Kf1 Bf5 10. Qa4+ Qd7 11. Qxd7+ Kxd7 12. b3 Ng4 13. Be4 Bxe4 14. Nxe4 f5 15. h3 fxe4 16. hxg4 Bd6 17. Kg2 Rhf8 18. Rf1 Rf7 19. Nc3 Re8 20. Rb1 b5 21. Bb2 Be5 22. Nd1 Bd4 23. Bxd4 cxd4 24. Nb2 Ne5 25. a4 Kd6 26. axb5 Kxd5 27. Ra1 Ref8 28. Ra5 Kc5 29. b6+ Kd6 30. bxa7 Ra8 31. Rfa1 Nc6 32. Nc4+ Ke6 33. Ra6 Rc7 34. Na5 Rcxa7 35. Rxc6+ Kd5 36. b4 Rxa5 37. Rxa5+ Rxa5 38. bxa5 Kxc6 39. f3 e3 40. dxe3 dxe3 41. f4 Kb5 42. Kf3 e2 43. Kxe2 Kxa5 44. Ke3 Kb5 45. Ke4 Kc6 46. Ke5 Kd7 47. g5 Ke7 48. f5 Kf7 49. g4 Ke7 50. f6+ Kf7 51. Kf5 h6 52. gxh6 gxh6 53. Ke5 Kf8 54. Ke6 Ke8 55. f7+ Kf8 56. Kf6 h5 57. g5 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.13"]
[Round "6"]
[White "Calcada, Lucas Galvan"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "A38"]
[WhiteElo "1505"]
[BlackElo "1738"]
[PlyCount "118"]
[EventDate "2021.06.11"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 c5 3. g3 g6 4. Nc3 Bg7 5. Bg2 Nc6 6. 0-0 0-0 7. Rb1 Rb8 8. a3 a5 9. d3 d6 10. Bd2 Be6 11. Na2 b5 12. Ng5 b4 13. Nxe6 fxe6 14. Bxc6 d5 15. Bb5 Qd6 16. Qa4 Ng4 17. h3 Ne5 18. Qc2 b3 19. Qxb3 dxc4 20. Qa4 cxd3 21. Bxd3 c4 22. Bxc4 Qxd2 23. Bxe6+ Kh8 24. Nc3 Rxb2 25. Rxb2 Qxb2 26. Qxa5 Nc6 27. Qc5 Qxc3 28. Qxc3 Bxc3 29. Bd5 Nd4 30. Bc4 Ra8 31. e3 Nf3+ 32. Kg2 Nd2 33. Rc1 Rxa3 34. Be6 Kg7 35. Rc2 Kf6 36. Bd5 Ke5 37. Bf3 Kd6 38. Be2 Kc5 39. Bd3 e5 40. f3 Nc4 41. Bxc4 Kxc4 42. Re2 Kd3 43. Kf2 Rb3 44. g4 Rb2 45. Rxb2 Bxb2 46. e4 Bd4+ 47. Kf1 Ke3 48. Kg2 g5 49. Kg3 Bc3 50. Kg2 Be1 51. Kh2 Kxf3 52. Kg1 Kxe4 53. Kh2 Kf3 54. Kg1 e4 55. Kf1 Bh4 56. Kg1 e3 57. Kf1 e2+ 58. Kg1 e1Q+ 59. Kh2 Bg3# 0-1

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.13"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Dull, Amanda Paul"]
[Result "0-1"]
[ECO "D91"]
[WhiteElo "1738"]
[BlackElo "1836"]
[PlyCount "74"]
[EventDate "2021.06.11"]
[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 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. cxd5 Nxg5 7. Nxg5 e6 8. Qd2 exd5 9. Qe3+ Kf8 10. Qf4 Bf6 11. h4 c6 12. 0-0-0 h6 13. Nf3 Be6 14. e4 dxe4 15. Nxe4 Bg7 16. Nc5 Bd5 17. Nxb7 Qe7 18. Nc5 h5 19. Kb1 Bxf3 20. Qxf3 Nd7 21. Bc4 Nxc5 22. dxc5 Rb8 23. b3 Kg8 24. Rhe1 Qc7 25. Rd6 Rf8 26. Rxg6 Qa5 27. Re8 Qc7 28. Qf6 Rh7 29. Re7 Qd8 30. Bxf7+ Kh8 31. Qd6 Qc8 32. Be6 Qa6 33. Rexg7 Qf1+ 34. Kb2 Rxf2+ 35. Ka3 Qc1+ 36. Ka4 Rxa2+ 37. Kb4 a5# 0-1

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.12"]
[Round "4"]
[White "Gomes, Lorenzo Bevervanco"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B15"]
[BlackElo "1738"]
[PlyCount "84"]
[EventDate "2021.06.11"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. Nf3 Bd6 7. Bc4 0-0 8. 0-0 Bg4 9. h3 Bh5 10. d5 c5 11. Re1 Nd7 12. g4 Bg6 13. Bd2 Nb6 14. Bd3 Bxd3 15. cxd3 Nxd5 16. a3 Qd7 17. Qb3 Bf4 18. Bxf4 Nxf4 19. d4 Nxh3+ 20. Kf1 Qxg4 21. dxc5 Nf4 22. Re2 Qh3+ 23. Ke1 Ng2+ 24. Kd2 Rfd8+ 25. Kc2 Qf5+ 26. Kc3 Qd3+ 27. Kb4 a5+ 28. Ka4 Qd7+ 29. Qb5 Qg4+ 30. Kb3 Qxf3+ 31. Ka2 a4 32. Rc1 Qd5+ 33. Ka1 b6 34. Qxb6 Nf4 35. Re7 Qd2 36. Rb1 Nd5 37. Qb7 Nxe7 38. Qxe7 Qd4 39. c6 Rdc8 40. Qb7 Rab8 41. Qe7 Rxc6 42. Re1 Qxb2# 0-1

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.12"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Nunes, Lucas Alexandre"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "1738"]
[BlackElo "1371"]
[PlyCount "65"]
[EventDate "2021.06.11"]
[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. Nf3 Nf6 3. c4 Bf5 4. e3 e6 5. Qb3 b6 6. Nc3 c6 7. a4 Be7 8. a5 Nbd7 9. Qa4 c5 10. axb6 Qxb6 11. Qb5 Bd8 12. cxd5 exd5 13. dxc5 Qxb5 14. Bxb5 0-0 15. Nd4 Be6 16. b4 a5 17. Bxd7 Nxd7 18. c6 Ne5 19. b5 Nc4 20. Ke2 Bc7 21. Kd3 Rfd8 22. Ba3 g6 23. Rhb1 Rdb8 24. Bc5 Bb6 25. Na4 Kg7 26. Nxe6+ fxe6 27. Nxb6 Nxb6 28. Bxb6 Rxb6 29. Kd4 Kf7 30. Kc5 Rbb8 31. b6 Ke7 32. c7 Re8 33. b7 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.12"]
[Round "2"]
[White "Starke, Bruno Orlando"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2138"]
[BlackElo "1738"]
[PlyCount "75"]
[EventDate "2021.06.11"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 e6 7. Nd2 Be7 8. h3 Bd7 9. Ngf3 a6 10. a4 0-0 11. 0-0 Ne8 12. Re1 f5 13. Ne5 Nxe5 14. Bxe5 Nd6 15. Bxd6 Bxd6 16. Qb3 Rf7 17. c4 Qf6 18. Nf3 Bc6 19. c5 Bf8 20. Ne5 Rc7 21. Qb6 Rac8 22. b4 Be8 23. b5 axb5 24. axb5 g6 25. Ra7 Qe7 26. Bc2 Bg7 27. Bb3 Rd8 28. Qa5 Bf7 29. Qa2 Qh4 30. Nf3 Qf4 31. Re3 Qh6 32. b6 Rcd7 33. Ba4 Re7 34. c6 Be8 35. Rxb7 Rxb7 36. cxb7 Bf8 37. Bxe8 Rxe8 38. Qa8 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.06.11"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Kim, Andre"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1738"]
[BlackElo "1122"]
[PlyCount "67"]
[EventDate "2021.06.11"]
[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. Nf3 Nf6 3. g3 Nc6 4. Bg2 Bg4 5. b3 e6 6. 0-0 Bd6 7. Bb2 0-0 8. Nbd2 Re8 9. c4 Ne7 10. c5 c6 11. cxd6 Qxd6 12. a4 Rad8 13. Ne5 Nd7 14. Nxg4 Nf5 15. Qc2 c5 16. dxc5 Nxc5 17. e4 Ne7 18. exd5 Nxd5 19. Nc4 Qc7 20. Bxd5 Rxd5 21. Qc3 f6 22. Nce3 Rd3 23. Qc4 Red8 24. b4 Na6 25. Qxe6+ Kf8 26. Rac1 Qb8 27. Rfd1 Rxd1+ 28. Rxd1 Re8 29. Qd5 Nc7 30. Qd6+ Kg8 31. Nxf6+ gxf6 32. Qxf6 Ne6 33. Nf5 Qc7 34. Nh6# 1-0

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.09"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Mendes, Rodrigo Machado"]
[Result "1-0"]
[ECO "E38"]
[WhiteElo "1635"]
[BlackElo "1853"]
[PlyCount "119"]
[EventDate "2021.05.07"]
[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 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Na6 6. Bd2 Nxc5 7. f3 0-0 8. e4 d6 9. Nge2 Ba5 10. a3 Bc7 11. b4 Na6 12. 0-0-0 b6 13. g4 Ne8 14. h4 Bb7 15. Nd4 Rc8 16. Kb1 d5 17. exd5 exd5 18. Nf5 d4 19. Ne4 Nd6 20. Bd3 Nxe4 21. Bxe4 Bxe4 22. Qxe4 Re8 23. Qd3 Nb8 24. Rhe1 Nc6 25. Rxe8+ Qxe8 26. Re1 Qd7 27. f4 Re8 28. Rxe8+ Qxe8 29. b5 Nd8 30. Qxd4 Ne6 31. Qe4 Qd8 32. Qd5 Qb8 33. Ne7+ Kf8 34. Nc6 Qe8 35. Bb4+ Kg8 36. f5 Nf4 37. Ne7+ Kh8 38. Qe4 Qd8 39. Kc2 Nh3 40. Qd5 Qe8 41. g5 Nf4 42. Qe4 Qd8 43. Kb3 h6 44. gxh6 Nh5 45. Qg4 g6 46. Bc3+ f6 47. Nxg6+ Kh7 48. Qxh5 Qd6 49. Qe2 Kxh6 50. Qd2+ Kh5 51. Qe2+ Kh6 52. Bd2+ Kg7 53. Qe7+ Kg8 54. Qxd6 Bxd6 55. Bf4 Bxa3 56. Bb8 Bc5 57. Bxa7 Kh7 58. Kc3 Kh6 59. Kd3 Kh5 60. Bb8 1-0

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.09"]
[Round "6"]
[White "Volkmann, Andre Jordi"]
[Black "Leffeck, Mateus Bernal"]
[Result "1/2-1/2"]
[ECO "A03"]
[WhiteElo "2100"]
[BlackElo "1635"]
[PlyCount "107"]
[EventDate "2021.05.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 Nc6 3. g3 Bf5 4. Bg2 e6 5. 0-0 h5 6. h3 Bd6 7. d3 Qd7 8. Nh4 Bh7 9. Nc3 g5 10. Nf3 g4 11. Ng5 0-0-0 12. e4 Bc5+ 13. Kh1 d4 14. Ne2 Bg6 15. h4 f6 16. Nxe6 Qxe6 17. f5 Bxf5 18. Rxf5 Bd6 19. Nf4 Bxf4 20. Rxf4 Nge7 21. Qf1 Rdf8 22. b3 Ng6 23. Rf5 Nge7 24. Rf2 Rf7 25. Ba3 Ng6 26. Kh2 Nce7 27. Re1 Re8 28. Bxe7 Nxe7 29. Rf4 Nd5 30. Rf2 Ne3 31. Qe2 f5 32. exf5 Rxf5 33. Be4 Rf6 34. c3 c5 35. cxd4 cxd4 36. Rc1+ Kb8 37. Qe1 Ref8 38. Rxf6 Qxf6 39. Qb4 b6 40. Qb5 Qf2+ 41. Kh1 Qxg3 42. Qc6 Qxh4+ 43. Kg1 Qg3+ 44. Kh1 Qh3+ 45. Kg1 Rf1+ 46. Rxf1 Qxf1+ 47. Kh2 Qh3+ 48. Kg1 Qg3+ 49. Kh1 Qe1+ 50. Kh2 Nf1+ 51. Kg1 Ne3+ 52. Kh2 Qf2+ 53. Kh1 Qe1+ 54. Kh2 1/2-1/2

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.08"]
[Round "4"]
[White "Cordioli, Jairo Ribeiro"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "E38"]
[WhiteElo "1790"]
[BlackElo "1635"]
[PlyCount "122"]
[EventDate "2021.05.07"]
[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 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 Bxc5 6. Nf3 b6 7. Bg5 Bb7 8. e3 d6 9. a3 a5 10. Bd3 h6 11. Bxf6 Qxf6 12. Ne4 Qe7 13. 0-0-0 Nd7 14. Nd4 a4 15. Nb5 0-0 16. Be2 d5 17. Nec3 Rfc8 18. Kb1 dxc4 19. Bxc4 Ne5 20. Be2 Ba6 21. f4 Nd7 22. Qd2 Nf6 23. Bf3 Bb7 24. Rhe1 Bc6 25. Bxc6 Rxc6 26. e4 Ng4 27. Re2 Nxh2 28. e5 Ng4 29. Ne4 Ra5 30. Nbc3 Kf8 31. Nxc5 Rcxc5 32. Qd8+ Qxd8 33. Rxd8+ Ke7 34. Red2 Rc7 35. R8d6 Ne3 36. Rd8 Nxg2 37. Rg8 Nxf4 38. Rdd8 f5 39. Rb8 Kf7 40. Rgd8 Rxe5 41. Rxb6 Nd5 42. Nxd5 Rxd5 43. Rxd5 exd5 44. Rd6 Rc5 45. b4 axb3 46. Kb2 f4 47. Kxb3 f3 48. Kb4 f2 49. Kxc5 f1Q 50. Rxd5 Qc1+ 51. Kb4 Qb2+ 52. Ka4 Qb6 53. Rf5+ Ke7 54. Rf7+ Kd8 55. Rf8+ Kc7 56. Rf7+ Kb8 57. Rf8+ Ka7 58. Ra8+ Kb7 59. Rb8+ Kc6 60. Rc8+ Qc7 61. Ra8 Kb7 0-1

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.08"]
[Round "2"]
[White "Kim, Thiago"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1828"]
[BlackElo "1635"]
[PlyCount "104"]
[EventDate "2021.05.07"]
[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 c6 2. d4 d5 3. e5 Bf5 4. h4 Bd7 5. Bd3 c5 6. dxc5 e6 7. a3 Nc6 8. Nf3 Bxc5 9. b4 Bb6 10. Bb2 h5 11. Nbd2 Nh6 12. c4 Ne7 13. c5 Bc7 14. Qe2 b6 15. Nb3 Ba4 16. Bb5+ Bxb5 17. Qxb5+ Qd7 18. a4 bxc5 19. Qxd7+ Kxd7 20. Nxc5+ Ke8 21. 0-0 a5 22. b5 Bb6 23. Rac1 Nc8 24. Nd4 Bxc5 25. Rxc5 Nb6 26. Rfc1 Nc4 27. Bc3 Kd7 28. Nb3 Rhc8 29. Rxc8 Rxc8 30. Ra1 Ra8 31. Nd2 Nxd2 32. Bxd2 Nf5 33. Be3 Nxe3 34. fxe3 Rc8 35. Rd1 Rc4 36. Rd4 Rb4 37. Kf2 Kc7 38. Rxb4 axb4 39. Ke2 Kb6 40. Kd3 f6 41. exf6 gxf6 42. e4 dxe4+ 43. Kxe4 f5+ 44. Kd4 Ka5 45. Kc4 e5 46. b6 Kxb6 47. Kxb4 e4 48. g3 Ka6 49. a5 Kb7 50. Kc4 Ka7 51. Kd4 Ka6 52. g4 hxg4 0-1

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.08"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Filimberti Uczai, Joao Pedro"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1635"]
[BlackElo "2061"]
[PlyCount "80"]
[EventDate "2021.05.07"]
[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. Bf4 Nf6 3. Nf3 e6 4. e3 c5 5. c3 Nc6 6. Nbd2 Bd6 7. Ne5 Qc7 8. Ndf3 Nd7 9. Nxd7 Bxd7 10. Bxd6 Qxd6 11. Be2 e5 12. dxe5 Nxe5 13. 0-0 0-0 14. c4 Rfd8 15. Qxd5 Qxd5 16. cxd5 Ng4 17. Rfd1 Nf6 18. Ne5 Bf5 19. Bf3 Rac8 20. Rac1 g5 21. g4 Be4 22. Bxe4 Nxe4 23. f3 Nd6 24. Kf2 Kf8 25. Nc4 Nxc4 26. Rxc4 Ke7 27. e4 Kd6 28. Ke3 f6 29. a4 b6 30. Rdc1 Rc7 31. b4 Rb8 32. a5 Rbb7 33. a6 Rb8 34. b5 h5 35. f4 gxf4+ 36. Kxf4 hxg4 37. Kxg4 Ke5 38. Kf3 Rh8 39. Rh1 Rh3+ 40. Kg4 Rch7 0-1

[Event "Sao Bento do Sul op 05"]
[Site "Sao Bento do Sul"]
[Date "2021.05.07"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Cuco, Gustavo Henrique"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "1635"]
[PlyCount "65"]
[EventDate "2021.05.07"]
[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 c5 4. cxd5 exd5 5. dxc5 Bxc5 6. Qxd5 Qxd5 7. Nxd5 Bd6 8. e4 Ne7 9. Nxe7 Bxe7 10. f4 0-0 11. Nf3 Nc6 12. a3 h6 13. Bc4 Be6 14. Bxe6 fxe6 15. Be3 Rad8 16. Ke2 b5 17. Rac1 Rc8 18. Rhd1 Na5 19. Nd4 Nc4 20. Nxe6 Nxb2 21. Nxf8 Rxc1 22. Rxc1 Kxf8 23. Bxa7 Bxa3 24. Bc5+ Bxc5 25. Rxc5 b4 26. Rb5 Nc4 27. Rxb4 Nd6 28. Ke3 g6 29. g4 Kf7 30. e5 Ne8 31. Ke4 g5 32. Rb7+ Kg6 33. f5# 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.02.20"]
[Round "4"]
[White "Jorge, Denrick Cabral Jose"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B17"]
[WhiteElo "1871"]
[BlackElo "1655"]
[PlyCount "35"]
[EventDate "2021.02.19"]
[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 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Ng3 e6 7. Bd3 b6 8. c4 Be7 9. Qc2 Bb7 10. Be3 Bb4+ 11. Nd2 c5 12. 0-0-0 Bxg2 13. Rhg1 Bb7 14. Nde4 Qc7 15. Ne2 cxd4 16. Nxd4 g6 17. Nxf6+ Nxf6 18. Qa4+ 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.02.20"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Schmitt, Cristofer Brogni"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "1655"]
[PlyCount "22"]
[EventDate "2021.02.19"]
[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 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Qb3 0-0 7. 0-0 c5 8. Be3 Na6 9. Nbd2 Bd6 10. Bg5 h6 11. Bxf6 Qxf6 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.02.19"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Giovanella, Miguel Loch Lopes"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1655"]
[PlyCount "77"]
[EventDate "2021.02.19"]
[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 Nf6 3. cxd5 Qxd5 4. Nc3 Qd8 5. e4 e6 6. a3 Nc6 7. Nf3 g6 8. Bg5 Bg7 9. e5 0-0 10. exf6 Bxf6 11. Bxf6 Qxf6 12. Bb5 Ne7 13. 0-0 a6 14. Bc4 c6 15. Qd3 Nd5 16. Ne4 Qe7 17. Rfe1 e5 18. dxe5 Be6 19. Bxd5 Rfd8 20. Nf6+ Kg7 21. Ng5 Bxd5 22. Qh3 Rh8 23. f4 h6 24. Nge4 Bxe4 25. Rxe4 Qc5+ 26. Kh1 Rad8 27. f5 h5 28. Qh4 Qc2 29. fxg6 Rd1+ 30. Rxd1 Qxd1+ 31. Re1 Qd8 32. gxf7 Kxf7 33. e6+ Kg6 34. e7 Qxe7 35. Rxe7 Re8 36. Qxh5+ Kxf6 37. Qe5+ Kg6 38. Rg7+ Kh6 39. Qf6+ 1-0

[Event "Timbo op"]
[Site "Timbo"]
[Date "2021.02.19"]
[Round "2"]
[White "Mariani, Daniel Brandao"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "2020"]
[BlackElo "1655"]
[PlyCount "57"]
[EventDate "2021.02.19"]
[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 f5 2. g3 Nf6 3. Bg2 c6 4. c4 g6 5. Qc2 Bg7 6. Nh3 0-0 7. Nc3 Na6 8. 0-0 d6 9. d5 Qc7 10. Nf4 e5 11. dxe6 Nc5 12. b3 Nxe6 13. Nxe6 Bxe6 14. Ba3 Rfe8 15. Rad1 Rad8 16. Rd2 Rd7 17. Rfd1 Red8 18. Rd3 Qa5 19. Bxd6 Ne8 20. b4 Qa6 21. Be7 Rxd3 22. Rxd3 Rxd3 23. exd3 Qa3 24. Nb1 Qb2 25. Qxb2 Bxb2 26. a4 Bf7 27. Bc5 a6 28. Nd2 Nf6 29. Nb3 1-0

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.23"]
[Round "9"]
[White "Alves da Silva, Thiago"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1991"]
[BlackElo "1642"]
[PlyCount "57"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 Nc6 5. Nf3 cxd4 6. cxd4 d6 7. Bc4 dxe5 8. Nxe5 Nxe5 9. dxe5 Be6 10. Qa4+ Bd7 11. Qb3 Bc6 12. e6 fxe6 13. 0-0 g6 14. Qh3 Qd6 15. Nc3 Bg7 16. Re1 Nxc3 17. bxc3 Bd5 18. Bb5+ Bc6 19. Bxc6+ bxc6 20. Bg5 e5 21. Rad1 Qc5 22. Qe6 Rf8 23. Bxe7 Qxf2+ 24. Kh1 Qf5 25. Qxc6+ Kxe7 26. Qc7+ Ke8 27. Qxg7 e4 28. Qb7 Rd8 29. Rxe4+ 1-0

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.23"]
[Round "8"]
[White "Leffeck, Mateus Bernal"]
[Black "Silva, Janderson Rossi Da"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "1642"]
[BlackElo "1862"]
[PlyCount "90"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. f4 Qc7 8. Qe2 e6 9. 0-0-0 Be7 10. g4 b5 11. a3 Bb7 12. Bg2 Rc8 13. e5 Bxg2 14. exf6 Bxh1 15. fxg7 Rg8 16. Bxe7 Kxe7 17. Rxh1 Qc4 18. Qf2 Rxg7 19. Re1 Kd8 20. Ne4 Nc5 21. Qh4+ Kd7 22. Nf6+ Kc7 23. Rd1 Kb7 24. Qg3 Qa2 25. Qf3+ d5 26. f5 Qa1+ 27. Kd2 Qxb2 28. Ke1 Na4 29. fxe6 fxe6 30. Qb3 Qc3+ 31. Qxc3 Rxc3 32. Rd3 Rxd3 33. cxd3 Rg6 34. Nxh7 Nc5 35. Nf8 Rxg4 36. Nfxe6 Nxe6 37. Nxe6 Rh4 38. Kd2 Rxh2+ 39. Kc3 Rh4 40. Ng7 Kc6 41. Nf5 Ra4 42. Kb3 Kc5 43. Kc3 Rxa3+ 44. Kb2 Rxd3 45. Kc2 Rf3 0-1

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.22"]
[Round "7"]
[White "Cristino, Felipe Borges"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "1929"]
[BlackElo "1642"]
[PlyCount "94"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e3 d6 6. d5 e5 7. dxe6 0-0 8. Qb3 c6 9. c5 d5 10. Nd4 Re8 11. Be2 Qa5 12. Bd2 Qxc5 13. Na4 Qd6 14. Bb4 Qc7 15. e7 Ne4 16. Rc1 Bxd4 17. exd4 Qf4 18. 0-0 Nd2 19. Bxd2 Qxd2 20. Qa3 Qxe2 21. Nb6 Qxe7 22. Qxe7 Rxe7 23. Nxa8 Kf7 24. Rfe1 Na6 25. Rxe7+ Kxe7 26. Rc3 Kf6 27. f4 h5 28. a3 Bd7 29. b4 b5 30. a4 bxa4 31. Ra3 c5 32. dxc5 Bc6 33. Kf2 Ke7 34. Ke2 Kd7 35. Ke3 Nxb4 36. Kd2 Na6 37. Nb6+ axb6 38. cxb6 Nc5 39. Kc3 Ne4+ 40. Kd4 Kc8 41. Ra1 Kb7 42. Rb1 Nd2 43. Rb2 Nc4 44. Rb1 a3 45. Kc5 Nd2 46. Rd1 a2 47. Kb4 Nb1 0-1

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.21"]
[Round "6"]
[White "Leffeck, Mateus Bernal"]
[Black "Freitas, Mauricio Mathioli"]
[Result "1-0"]
[ECO "A47"]
[WhiteElo "1642"]
[PlyCount "112"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 b6 4. Bg2 Bb7 5. 0-0 c5 6. c3 d5 7. Nbd2 Be7 8. Ne5 0-0 9. f4 Nbd7 10. Ndf3 Ne4 11. Nxd7 Qxd7 12. Ne5 Qc7 13. e3 g6 14. Bxe4 dxe4 15. h4 f6 16. Ng4 Qc6 17. Bd2 cxd4 18. cxd4 Qb5 19. Bc3 Ba6 20. Rf2 Rad8 21. Rd2 Qf5 22. Nf2 Bb7 23. a4 e5 24. dxe5 Rxd2 25. Qxd2 fxe5 26. Bxe5 Rd8 27. Qc3 Qe6 28. Bh8 Bf8 29. Qf6 Qxf6 30. Bxf6 Rd2 31. Rd1 Rxd1+ 32. Nxd1 Kf7 33. Bd4 Ke6 34. Nc3 Bc5 35. Bxc5 bxc5 36. Kf2 c4 37. Nb5 a6 38. Nd4+ Kf6 39. g4 h5 40. g5+ Kf7 41. Ke2 Bc8 42. Kd2 Bd7 43. a5 Bh3 44. Kc3 Bf1 45. Nc6 Bh3 46. Kxc4 Bf1+ 47. Kd4 Bd3 48. Ne5+ Ke6 49. Nxd3 exd3 50. Kxd3 Kf5 51. Kd4 Kg4 52. e4 Kxh4 53. e5 Kg4 54. e6 h4 55. e7 h3 56. e8Q h2 1-0

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.21"]
[Round "5"]
[White "Lima, Stefan Moisei Vieir"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B11"]
[BlackElo "1642"]
[PlyCount "83"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Nf3 d4 4. Ne2 c5 5. c3 dxc3 6. bxc3 Nc6 7. h3 e5 8. Ng3 a6 9. Bc4 h6 10. Qb3 Qc7 11. Bd5 Nf6 12. 0-0 Bd6 13. Bxc6+ Qxc6 14. Re1 Be6 15. Qc2 c4 16. Nf5 0-0 17. Nxd6 Qxd6 18. a4 Nd7 19. Ba3 Nc5 20. a5 Qd3 21. Qb2 Qd6 22. Rab1 Rac8 23. Qb6 Rfd8 24. Re2 Rc6 25. Bxc5 Rxb6 26. Bxb6 Rd7 27. Rb4 f6 28. Re3 Qc6 29. Re1 Bf7 30. Nh4 Rxd2 31. Nf5 Rd7 32. f3 Bg6 33. Ne3 Bf7 34. Nf5 Kh7 35. Bf2 Rd3 36. Reb1 Rxc3 37. Rb6 Qd7 38. Rxb7 Qd3 39. R1b6 Rb3 40. Rxf7 c3 41. Rxg7+ Kh8 42. Rxf6 1-0

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.20"]
[Round "4"]
[White "Leffeck, Mateus Bernal"]
[Black "Filimberti Uczai, Joao Pedro"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1642"]
[BlackElo "2038"]
[PlyCount "62"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 Nf6 3. Nf3 e6 4. e3 c5 5. c3 Nc6 6. Nbd2 Bd6 7. Ne5 0-0 8. Bd3 Qe7 9. 0-0 Nd7 10. Ndf3 f5 11. a4 Ncxe5 12. Nxe5 Bxe5 13. Bxe5 Nxe5 14. dxe5 Qc7 15. f4 c4 16. Bc2 Qb6 17. Qd2 Bd7 18. Rfb1 Rac8 19. Qd4 Qc5 20. a5 a6 21. Kf2 Qe7 22. g3 Rc5 23. b4 cxb3 24. Rxb3 Bb5 25. Rb4 Rfc8 26. Ra3 Rc4 27. Rxc4 Rxc4 28. Qb6 Rc6 29. Qa7 Qxa3 30. Qa8+ Qf8 31. Qxb7 Rxc3 0-1

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.19"]
[Round "3"]
[White "Conor, Gilberto Bordignon"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B17"]
[BlackElo "1642"]
[PlyCount "117"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Bc4 Ngf6 6. Ng5 e6 7. Ne2 Bd6 8. 0-0 0-0 9. Nf4 Bxf4 10. Bxf4 Nb6 11. Bd3 h6 12. Nf3 Nbd5 13. Bd2 Qb6 14. c4 Ne7 15. Bc3 c5 16. Qd2 Nf5 17. Bxf5 exf5 18. dxc5 Qc6 19. Bxf6 Qxf6 20. Qd4 Qd8 21. Rfe1 Be6 22. b3 Rc8 23. Qd6 Qc7 24. Nd4 Rfe8 25. Nxe6 Rxe6 26. Qxc7 Rxc7 27. b4 b6 28. cxb6 Rxb6 29. c5 Rxb4 30. Rac1 Ra4 31. Rc2 Ra5 32. Rec1 Kf8 33. f4 Ke7 34. Kf2 Kf6 35. c6 g5 36. g3 Ra3 37. Rd1 gxf4 38. gxf4 Rh3 39. Kg2 Rh4 40. Kg3 Rg4+ 41. Kf3 Rg6 42. Rc5 Kg7 43. Rdc1 Rf6 44. h4 Kg6 45. a4 Re6 46. a5 Kf6 47. a6 Ke7 48. Rb1 Kf6 49. Rb7 Rcxc6 50. Rxc6 Rxc6 51. Rxa7 Rc3+ 52. Ke2 Ra3 53. Ra8 Kg6 54. a7 Kh5 55. Kf2 Kxh4 56. Rh8 Rxa7 57. Rxh6+ Kg4 58. Rb6 Kxf4 59. Rb4+ 0-1

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.19"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "Andrade, Guilherme A de Sou"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1642"]
[BlackElo "1899"]
[PlyCount "108"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 d5 3. Nf3 c5 4. e3 Nc6 5. c3 Qb6 6. b3 cxd4 7. exd4 Bf5 8. Bd3 Bxd3 9. Qxd3 e6 10. Nbd2 Be7 11. h3 Rc8 12. 0-0 0-0 13. Ne5 Qd8 14. Ndf3 Nxe5 15. Nxe5 Qa5 16. c4 dxc4 17. bxc4 Rfd8 18. Rfd1 Ba3 19. Rab1 Qa6 20. c5 Qa4 21. Qc4 Qa5 22. Bd2 Qc7 23. Qc3 Bxc5 24. Qxc5 Qb8 25. Qb4 b6 26. Rbc1 Qb7 27. Qb2 Qe4 28. Bg5 h6 29. Bxf6 gxf6 30. Nf3 Rxc1 31. Qxc1 Kg7 32. Qe3 Qc2 33. Qd2 Qe4 34. Qd3 Qf4 35. Qe3 Qf5 36. Re1 Rg8 37. Qe4 Qa5 38. Re3 Qxa2 39. Ne5 fxe5 40. Rg3+ Kh8 41. Qxe5+ Kh7 42. Rf3 Qb1+ 43. Kh2 Qg6 44. g3 Rg7 45. Rf6 Qg5 46. Qe4+ Kh8 47. Qa8+ Rg8 48. Qf3 Rg7 49. h4 Qd5 50. Rxh6+ Kg8 51. Qc3 Qd7 52. Qc4 Qd8 53. Rh5 Rh7 54. Rg5+ Qxg5 0-1

[Event "Florianopolis op 7th"]
[Site "Florianopolis"]
[Date "2021.01.18"]
[Round "1"]
[White "Metidieri, Diogenes Galavotti"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1179"]
[BlackElo "1642"]
[PlyCount "72"]
[EventDate "2021.01.18"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. e3 Nf6 4. Nf3 b6 5. Nc3 Ba6 6. Qb3 c6 7. Bd2 Bd6 8. a4 Nbd7 9. h3 0-0 10. Bd3 e5 11. e4 exd4 12. Nxd4 Nc5 13. Qc2 Nxd3+ 14. Qxd3 Bxc4 15. Qe3 Bc5 16. Nxc6 Bxe3 17. Nxd8 Bxd2+ 18. Kxd2 Raxd8 19. exd5 Nxd5 20. Nxd5 Bxd5 21. f3 Bxf3+ 22. Ke3 Bxg2 23. Rh2 Rfe8+ 24. Kf2 Be4 25. Re1 Bg6 26. Rxe8+ Rxe8 27. Rh1 h6 28. Rc1 Re4 29. Rc8+ Kh7 30. b3 Rb4 31. Rc7 a5 32. Rc4 Rxc4 33. bxc4 Bd3 34. Ke3 Bxc4 35. Kd4 Bb3 36. Kc3 Bxa4 0-1

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.16"]
[Round "5"]
[White "Kim, Thiago"]
[Black "Leffeck, Mateus Bernal"]
[Result "1/2-1/2"]
[ECO "B11"]
[WhiteElo "1777"]
[BlackElo "1596"]
[PlyCount "42"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 dxe4 6. Nxe4 Nf6 7. Bc4 Nbd7 8. Nxf6+ Nxf6 9. 0-0 e6 10. d3 Be7 11. Bd2 0-0 12. a4 a5 13. Rfe1 Nd5 14. Bxd5 Qxd5 15. Qxd5 cxd5 16. d4 Rfc8 17. c3 Rc6 18. Bf4 Bd8 19. Re2 Rb6 20. Ra2 Rb3 21. Bd6 Ra6 1/2-1/2

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.16"]
[Round "6"]
[White "Leffeck, Mateus Bernal"]
[Black "Peroza, Eduardo Antunes"]
[Result "1/2-1/2"]
[ECO "A82"]
[WhiteElo "1596"]
[BlackElo "1836"]
[PlyCount "22"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 e6 3. e4 fxe4 4. Nxe4 Be7 5. Nf3 Nf6 6. Bd3 0-0 7. Qe2 Nc6 8. Bd2 Nd5 9. c3 d6 10. Neg5 Nf6 11. Nxe6 Bxe6 1/2-1/2

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.15"]
[Round "3"]
[White "Goncalves, Ruan Lucas Alves"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "1976"]
[BlackElo "1596"]
[PlyCount "63"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 cxd4 5. 0-0 g6 6. d3 Bg7 7. f4 a6 8. Ba4 b5 9. Bb3 d6 10. Qf3 Ra7 11. f5 e6 12. fxe6 Bxe6 13. Bxe6 fxe6 14. Qg4 Qe7 15. Bg5 Bf6 16. Bf4 Rc7 17. Na3 e5 18. Bd2 Qd7 19. Qf3 Qe6 20. Rf2 Rf7 21. Raf1 Ke7 22. b3 h6 23. Qg3 Rg7 24. c4 dxc3 25. Bxc3 Rhh7 26. Nc2 h5 27. Nb4 h4 28. Qe3 Ke8 29. Nd5 Bd8 30. Rf8+ Kd7 31. Qa7+ Kc6 32. Qxa6+ 1-0

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.15"]
[Round "4"]
[White "Leffeck, Mateus Bernal"]
[Black "Nunes, Lucas Alexandre"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "1596"]
[BlackElo "1370"]
[PlyCount "59"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Bb4 5. Bg5 c5 6. cxd5 exd5 7. e3 Nc6 8. a3 cxd4 9. axb4 dxc3 10. bxc3 Bg4 11. Be2 a6 12. 0-0 0-0 13. h3 h6 14. Bxf6 Qxf6 15. hxg4 Qxc3 16. Qxd5 Qxb4 17. Rfb1 Qxg4 18. Rxb7 Qc8 19. Rb6 Ne7 20. Qa5 Nc6 21. Qc3 Nb8 22. Qxc8 Rxc8 23. Nd4 a5 24. Bf3 Nd7 25. Rd6 Rab8 26. Rxd7 Rc5 27. Ra7 a4 28. R7xa4 Rbc8 29. Ra8 Rxa8 30. Rxa8+ 1-0

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.14"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "De Carvalho, Christopher"]
[Result "1/2-1/2"]
[ECO "D15"]
[WhiteElo "1596"]
[BlackElo "2121"]
[PlyCount "107"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 a6 5. a4 a5 6. Bf4 Bf5 7. e3 e6 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Bd3 Bb4+ 11. Kf1 Nd7 12. Bxf5 Qxf5 13. Rc1 Nb6 14. Qc2 Qxc2 15. Rxc2 Nxa4 16. Ke2 Ke7 17. Ne5 Nb6 18. e4 Rhd8 19. Be3 Ra6 20. Ra1 Rda8 21. Nd3 Ke8 22. Nxb4 axb4 23. Rxa6 Rxa6 24. Bd2 Ra4 25. b3 Ra5 26. Kd3 Rb5 27. f4 f5 28. exf5 exf5 29. Rc5 Rxc5 30. dxc5 Nd5 31. Kc4 Kd7 32. Bxb4 Nxf4 33. g3 Nd5 34. Bd2 Nf6 35. Kd4 Ke6 36. b4 Ne4 37. Be3 Kf6 38. g4 Ng5 39. gxf5 Kxf5 40. Bxg5 Kxg5 41. Ke5 Kg4 42. Kd6 Kh3 43. Kc7 Kxh2 44. Kxb7 g5 45. Kxc6 g4 46. b5 g3 47. b6 g2 48. b7 g1Q 49. b8Q+ Kh3 50. Qc8+ Kh4 51. Qd8+ Kh5 52. Qe8+ Kh6 53. Qf8+ Kh5 54. Qf5+ 1/2-1/2

[Event "Santa Catarina-ch 64th "]
[Site "Lages"]
[Date "2020.02.14"]
[Round "1"]
[White "Nones, Vinicius Gabriel"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "1024"]
[BlackElo "1596"]
[PlyCount "54"]
[EventDate "2020.02.14"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. c4 e5 2. g3 f5 3. e3 Nf6 4. Bg2 g6 5. Ne2 Bg7 6. Nbc3 0-0 7. 0-0 c6 8. e4 Kh8 9. d4 d6 10. d5 cxd5 11. cxd5 Nbd7 12. Be3 a6 13. f3 Nb6 14. b3 Bd7 15. a4 fxe4 16. fxe4 Ng4 17. Qd2 Nxe3 18. Qxe3 Bg4 19. h3 Bxe2 20. Nxe2 Nd7 21. Rac1 Nc5 22. Rc3 Rxf1+ 23. Bxf1 Qf6 24. Rc1 Qd8 25. Rd1 Bh6 26. Qc3 Nxe4 27. Qc2 Be3+ 0-1

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.26"]
[Round "10"]
[White "Da Silva, Anderson Lemes"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "E34"]
[WhiteElo "1788"]
[BlackElo "1552"]
[PlyCount "121"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. cxd5 Nxd5 6. Nf3 b6 7. e4 Bxc3+ 8. bxc3 Ne7 9. Bd3 Bb7 10. 0-0 Nd7 11. Be3 0-0 12. Qe2 Ng6 13. e5 a6 14. Ng5 Qe8 15. f4 h6 16. Nh3 Ne7 17. f5 exf5 18. Bxf5 Nxf5 19. Rxf5 Qe6 20. Raf1 a5 21. c4 Ba6 22. Qg4 Qg6 23. Qxg6 fxg6 24. Rxf8+ Rxf8 25. Rc1 c5 26. e6 cxd4 27. Bxd4 Nc5 28. Bxc5 bxc5 29. Nf2 Rf4 30. e7 Kf7 31. Nd3 Rf5 32. Re1 Ke8 33. Re4 Bb7 34. Re6 Rf6 35. Re3 Ba6 36. Re4 Rc6 37. Nf4 g5 38. Ne6 Rxe6 39. Rxe6 Bxc4 40. Re5 a4 41. a3 Bb3 42. Rxc5 Kxe7 43. Rc6 Kf7 44. Kf2 h5 45. Ke3 Bd5 46. Ra6 Bxg2 47. Rxa4 h4 48. Rg4 h3 49. Rxg5 Kf6 50. Rg3 g5 51. Kd4 Kf5 52. Kc5 g4 53. Kb6 Bf3 54. a4 Kf4 55. a5 Ke3 56. a6 Kf2 57. a7 Bg2 58. Rxg4 Kg1 59. a8Q Kxh2 60. Qa1 Bf1 61. Qe1 1-0

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.25"]
[Round "8"]
[White "Horisch, Juan Pablo"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1824"]
[BlackElo "1552"]
[PlyCount "93"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 c5 3. e3 Nc6 4. c3 Nf6 5. Nf3 e6 6. Nbd2 Be7 7. h3 Bd6 8. dxc5 Bxf4 9. exf4 Qc7 10. g3 Bd7 11. Bb5 a6 12. Bxc6 Bxc6 13. 0-0 Bb5 14. Re1 Qxc5 15. Nb3 Qd6 16. Nbd4 0-0 17. Nxb5 axb5 18. Qb3 Ra5 19. Nd4 Qa6 20. a3 Ne4 21. Qd1 Qb6 22. Qe2 Rfa8 23. Kg2 Nd6 24. Rad1 Nc4 25. h4 Re8 26. Qc2 Qd6 27. Qb3 Qc5 28. Re2 f6 29. Rxe6 Rxe6 30. Nxe6 Qe7 31. Nd4 g6 32. Qc2 Qe4+ 33. Qxe4 dxe4 34. Rb1 Nd2 35. Re1 Kf7 36. Re2 Nc4 37. Nb3 Ra8 38. Nc5 Re8 39. Nxb7 e3 40. fxe3 Rxe3 41. Rxe3 Nxe3+ 42. Kf3 Nc4 43. Ke4 Ke6 44. Nc5+ Kd6 45. Nd3 Nd2+ 46. Kd4 Nc4 47. a4 1-0

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.25"]
[Round "9"]
[White "Leffeck, Mateus Bernal"]
[Black "Borba da Rosa, Rodrigo"]
[Result "1-0"]
[ECO "A60"]
[WhiteElo "1552"]
[BlackElo "1294"]
[PlyCount "117"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 c5 2. d5 Nf6 3. c4 e6 4. Nc3 exd5 5. Nxd5 Nxd5 6. Qxd5 d6 7. e4 Nc6 8. Nf3 Be6 9. Qd1 Be7 10. a3 Bf6 11. Rb1 a5 12. Be2 0-0 13. 0-0 h6 14. Ne1 Qc7 15. Nc2 Ne5 16. Ne3 Rab8 17. Nd5 Bxd5 18. exd5 b6 19. f4 Ng6 20. Bd3 Rfe8 21. Qg4 Bd4+ 22. Kh1 Be3 23. Bxg6 Bxc1 24. Rbxc1 fxg6 25. Qxg6 Qe7 26. f5 Qf6 27. Qxf6 gxf6 28. Rce1 a4 29. Re6 Rxe6 30. fxe6 Kg7 31. Rf2 b5 32. cxb5 Rxb5 33. Rd2 c4 34. h3 f5 35. Kh2 Kf6 36. Kg3 Rc5 37. Kf4 c3 38. bxc3 Rxc3 39. Re2 Rc4+ 40. Kf3 Ke7 41. Rd2 Rc3+ 42. Kf4 Rxa3 43. Kxf5 Ra1 44. Kg6 a3 45. Kxh6 a2 46. Kg5 Kf8 47. g4 Kg7 48. h4 Re1 49. Rxa2 Re5+ 50. Kf4 Rxd5 51. Ra7+ Kf6 52. e7 Kf7 53. h5 Rd4+ 54. Kg5 Rd5+ 55. Kh6 Re5 56. g5 Kg8 57. Ra8+ Kf7 58. e8Q+ Rxe8 59. Rxe8 1-0

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.24"]
[Round "7"]
[White "Leffeck, Mateus Bernal"]
[Black "Marques, Eudes Pinto"]
[Result "1/2-1/2"]
[ECO "A60"]
[WhiteElo "1552"]
[BlackElo "1955"]
[PlyCount "100"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. d5 d6 5. e4 e5 6. Bd3 g6 7. Nge2 Bg7 8. 0-0 0-0 9. f4 Bg4 10. Qe1 Bxe2 11. Nxe2 Nbd7 12. f5 h6 13. g4 g5 14. Qg3 a6 15. h4 Nh7 16. hxg5 Nxg5 17. Kg2 Nf6 18. Bxg5 hxg5 19. Ng1 Re8 20. Nf3 Nd7 21. Rh1 f6 22. Qh3 Nf8 23. Qh5 Qe7 24. Rab1 Rab8 25. a4 Qf7 26. b4 b6 27. Qxf7+ Kxf7 28. b5 axb5 29. Rxb5 Nd7 30. Ra1 Ra8 31. a5 Ra6 32. Nd2 Rea8 33. Nb3 Bf8 34. Kf3 Be7 35. axb6 Rxa1 36. b7 Rb8 37. Nxa1 Bd8 38. Nb3 Bb6 39. Na5 Bxa5 40. Rxa5 Rxb7 41. Rb5 Rxb5 42. cxb5 Ke7 43. Ke3 Kd8 44. Kd2 Kc7 45. Kc3 Kb6 46. Kb3 Ka5 47. Be2 Nb6 48. Bf1 Nc8 49. Bc4 Nb6 50. Be2 Na8 1/2-1/2

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.23"]
[Round "5"]
[White "Cordeiro, Yan Henrique"]
[Black "Leffeck, Mateus Bernal"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1749"]
[BlackElo "1552"]
[PlyCount "107"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. c3 Nc6 4. Bf4 Nf6 5. e3 a6 6. Nbd2 Bg4 7. Be2 e6 8. h3 Bf5 9. Nh4 Bg6 10. Nxg6 hxg6 11. Nf3 Be7 12. a4 Ne4 13. Ne5 Rc8 14. 0-0 0-0 15. Bd3 Nxe5 16. Bxe5 f5 17. Bxe4 dxe4 18. f3 Qd5 19. fxe4 Qxe4 20. Qf3 Qxf3 21. gxf3 cxd4 22. exd4 Kf7 23. Kg2 Rh8 24. f4 Rh5 25. Rf3 g5 26. Rg3 Rch8 27. fxg5 Bxg5 28. Rg1 Bf6 29. Rd1 Rd8 30. Rdd3 Rh4 31. Bxf6 Kxf6 32. Rge3 g5 33. b3 Rd5 34. b4 f4 35. Rf3 Kf5 36. c4 Rd7 37. d5 exd5 38. Rxd5+ Rxd5 39. cxd5 Rh8 40. Rc3 Rd8 41. Rc7 Rxd5 42. Rxb7 Rd2+ 43. Kf3 Rd3+ 44. Kg2 Ra3 45. a5 Ke4 46. Re7+ Kd4 47. Re6 Kc4 48. Rxa6 Kxb4 49. Ra8 Rxa5 50. Rxa5 Kxa5 51. Kf3 Kb5 52. h4 gxh4 53. Kxf4 h3 54. Kg3 1/2-1/2

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.23"]
[Round "6"]
[White "Kanzler, Karina Daniela Ferr"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D04"]
[WhiteElo "1867"]
[BlackElo "1552"]
[PlyCount "76"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. e3 d5 5. d4 e6 6. Bd3 c5 7. 0-0 0-0 8. dxc5 Nc6 9. a3 a5 10. Bb5 Nd7 11. Bxg7 Kxg7 12. Nc3 Re8 13. Na4 e5 14. e4 d4 15. Rc1 Qe7 16. Nd2 Nxc5 17. Nb6 Ra7 18. Nxc8 Rxc8 19. Nc4 Qc7 20. Qg4 Ne6 21. g3 Raa8 22. f4 Na7 23. f5 Nf8 24. a4 Nxb5 25. axb5 Qc5 26. Kh1 b6 27. fxg6 hxg6 28. Qg5 Nd7 29. Rf5 f6 30. Qg4 Rf8 31. Rf2 Qxb5 32. Nd6 Qc6 33. Qe6 Qc7 34. Qe7+ Kh6 35. Nf7+ Rxf7 36. Qxf7 Rh8 37. Qd5 Qc3 38. Qe6 Qc7 1-0

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.22"]
[Round "4"]
[White "Leffeck, Mateus Bernal"]
[Black "Borges, Lucas Silvestre"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "1552"]
[BlackElo "1847"]
[PlyCount "106"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 c6 3. c4 e6 4. Nc3 f5 5. Bf4 Nf6 6. cxd5 exd5 7. e3 Bd6 8. Ne5 0-0 9. Bd3 Qe7 10. 0-0 Ne4 11. f3 Nxc3 12. bxc3 Nd7 13. Nxd7 Bxd7 14. Re1 Rae8 15. Qb3 Bc8 16. c4 dxc4 17. Bxc4+ Kh8 18. a4 Bxf4 19. exf4 Qd6 20. d5 Qxf4 21. dxc6 Qd4+ 22. Kh1 bxc6 23. Red1 Qe5 24. Qd3 Be6 25. Bxe6 Rxe6 26. Qa6 Qc7 27. Rab1 Rfe8 28. h3 g6 29. Qb7 R6e7 30. Qxc7 Rxc7 31. Rd2 Kg7 32. Rc2 Kf6 33. Kh2 Re5 34. Kg3 Rd5 35. Rc4 Ke6 36. Kf4 h6 37. h4 c5 38. Rbc1 Kd6 39. Ke3 g5 40. hxg5 hxg5 41. g3 Re7+ 42. Kf2 Rd2+ 43. Kf1 Rc7 44. Ke1 Rd4 45. Ke2 Re7+ 46. Kf2 Rxc4 47. Rxc4 Kd5 48. Rc1 c4 49. Rh1 c3 50. Rh8 Rc7 51. Rh1 Kd4 52. Rd1+ Kc4 53. Rc1 Re7 0-1

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.21"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Da Rosa, Henrique Jaze Simoe"]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "1552"]
[BlackElo "1763"]
[PlyCount "87"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. c4 c6 2. Nc3 d5 3. cxd5 cxd5 4. d4 Nf6 5. g3 Nc6 6. Bg2 e6 7. Nf3 Be7 8. 0-0 0-0 9. Bd2 b6 10. Rc1 Bb7 11. e3 Rc8 12. Qe2 Nb4 13. Qd1 Ba6 14. Ne2 Rxc1 15. Bxc1 Nxa2 16. Bd2 Nb4 17. Bxb4 Bxb4 18. Ne5 Qc8 19. Bf3 Ne4 20. Kg2 Nd2 21. Rh1 Nxf3 22. Nxf3 Qc4 23. Nf4 Rc8 24. Qa4 Ba5 25. Qd7 Qc7 26. Qa4 Qc6 27. Qa3 Qc4 28. Ne5 Qc2 29. b4 Rc3 30. Qa1 Rxe3 31. Rc1 Qe4+ 32. Kg1 Bxb4 33. Qxa6 Re1+ 34. Rxe1 Qxe1+ 35. Kg2 Qe4+ 36. Nf3 g5 37. Nh5 Qg6 38. Qc8+ Bf8 39. g4 f5 40. Ne5 Qh6 41. Qe8 fxg4 42. Qf7+ Kh8 43. Nxg4 Qg6 44. Qxf8+ 1-0

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.21"]
[Round "2"]
[White "Usui, Gabriella Yumi"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1227"]
[BlackElo "1552"]
[PlyCount "76"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. dxc5 Nc6 4. c4 d4 5. a3 a5 6. Bf4 e6 7. Nbd2 Bxc5 8. Nb3 b6 9. Ne5 Bb7 10. Nxc6 Bxc6 11. Be5 Qg5 12. Bg3 Rd8 13. Qd2 Qxd2+ 14. Kxd2 Nf6 15. Nxc5 bxc5 16. f3 Rd7 17. e4 0-0 18. Bd3 Rb7 19. Rab1 a4 20. Bd6 Rc8 21. Bxc5 Bxe4 22. Bxd4 Rd7 23. fxe4 Rxd4 24. Ke3 e5 25. Rbd1 Kf8 26. h3 Rb8 27. Rd2 Rb3 28. Rb1 Nxe4 29. Rdd1 Nc5 30. Ke2 Nxd3 31. Kf1 Rxb2 32. Rxb2 Nxb2 33. Rxd4 exd4 34. c5 Ke7 35. Ke2 Kd7 36. Kd2 Kc6 37. Kc2 Nc4 38. Kd3 Kxc5 0-1

[Event "Florianopolis op 6th"]
[Site "Florianopolis"]
[Date "2020.01.20"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "De Camargo Filho, Homero"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "1552"]
[PlyCount "46"]
[EventDate "2020.01.20"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 f5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 d6 6. e3 Nc6 7. a3 Ne4 8. h4 Nxc3 9. bxc3 Bf6 10. Bg5 0-0 11. Qc2 Bxg5 12. hxg5 e5 13. d5 Ne7 14. Be2 Ng6 15. e4 fxe4 16. Qxe4 Bf5 17. Qe3 Nf4 18. g3 Ng2+ 19. Kd2 Nxe3 20. Kxe3 Bg4 21. Rh4 Bxf3 22. Bxf3 Qxg5+ 23. Ke2 Qf6 0-1

[Event "Caioba Copel op 5th"]
[Site "Caioba"]
[Date "2019.09.17"]
[Round "4"]
[White "Ferreira, Julia Cristine"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "1359"]
[BlackElo "1620"]
[PlyCount "97"]
[EventDate "2019.08.15"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. g3 c5 5. cxd5 Nxd5 6. dxc5 Bxc5 7. Bg2 0-0 8. 0-0 Qb6 9. Qc2 Nc6 10. Ng5 Nf6 11. Ne4 Nxe4 12. Bxe4 h6 13. Nc3 Nd4 14. Qd1 Rd8 15. Bd3 Bd7 16. Na4 Bxa4 17. Qxa4 Nf3+ 18. Kg2 Ne5 19. Bc2 Rd4 20. Qb3 Rb4 21. Qc3 Bd4 22. Qd2 Bxb2 23. Rb1 Nc6 24. Qd3 g6 25. Bxh6 Rd8 26. Qf3 Ne5 27. Qe3 Qc6+ 28. Kg1 Qxc2 29. Qg5 Qxe2 30. Qxd8+ Kh7 31. Qf6 Nc6 32. Rfe1 Qh5 33. Rxb2 Qxh6 34. Qxf7+ Qg7 35. Qxg7+ Kxg7 36. Rxb4 Nxb4 37. a4 Kf6 38. Rb1 a5 39. Rc1 Nc6 40. Rc5 e5 41. Rb5 Kf5 42. Rxb7 g5 43. Rc7 Nd4 44. Rc5 Nf3+ 45. Kg2 g4 46. Rxa5 Ne1+ 47. Kh1 Nd3 48. Kg1 Ke4 49. Rb5 1-0

[Event "Caioba Copel op 5th"]
[Site "Caioba"]
[Date "2019.08.16"]
[Round "2"]
[White "Soares, Gustavo Henrique"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "1869"]
[BlackElo "1620"]
[PlyCount "67"]
[EventDate "2019.08.15"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Nf3 c6 8. Qc2 Qd6 9. Bd3 h6 10. Bf4 Qb4 11. Bc7 Bd8 12. a3 Qe7 13. Bxd8 Rxd8 14. b4 Be6 15. 0-0 Nbd7 16. Rab1 Rdc8 17. a4 b6 18. Ba6 Rc7 19. Nb5 Bf5 20. Qxf5 cxb5 21. Bxb5 Ne4 22. Qxd5 Rd8 23. Bxd7 Rdxd7 24. Qb3 Rc3 25. Qb2 Rdc7 26. Rbc1 Rxc1 27. Rxc1 Rxc1+ 28. Qxc1 Qxb4 29. Qc8+ Qf8 30. Qb7 Qa3 31. Qa8+ Kh7 32. Qxe4+ Kh8 33. Qe8+ Kh7 34. g3 1-0

[Event "Santa Catarina State-ch 63rd"]
[Site "Timbo"]
[Date "2019.06.09"]
[Round "6"]
[White "Butzke, Lucas de Castro"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "1296"]
[BlackElo "1677"]
[PlyCount "40"]
[EventDate "2019.06.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bd3 e6 8. 0-0 Ngf6 9. Bf4 Nd5 10. Be3 Bd6 11. Bxg6 hxg6 12. Ne4 Bxh2+ 13. Nxh2 Qh4 14. Bf4 Nxf4 15. f3 Qxh2+ 16. Kf2 Qxg2+ 17. Ke1 Rh2 18. Nf2 0-0-0 19. b4 Ne5 20. c3 Nxf3+ 0-1

[Event "Santa Catarina State-ch 63rd"]
[Site "Timbo"]
[Date "2019.06.09"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Sarda, Pedro Sada"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "1677"]
[BlackElo "1492"]
[PlyCount "90"]
[EventDate "2019.06.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h4 h5 6. Bg5 Nbd7 7. Be2 c5 8. d5 a6 9. f3 Ne5 10. Nh3 Bd7 11. 0-0 Qc8 12. Nf2 0-0 13. a3 Rb8 14. f4 Neg4 15. Nxg4 Nxg4 16. Bxe7 Ne3 17. Qd3 Bd4 18. Bxf8 Kxf8 19. Kh2 Nxf1+ 20. Rxf1 Qd8 21. g3 b5 22. cxb5 axb5 23. b4 Qe7 24. Rb1 Bxc3 25. Qxc3 Qxe4 26. Bd3 Qd4 27. Qxd4 cxd4 28. Rb3 Rc8 29. Bb1 Rc3 30. Rb2 Rxa3 31. Rd2 Rb3 32. Bd3 Rxb4 33. Kg2 Ke7 34. Kf3 Kf6 35. Ke2 Bf5 36. Kf3 Bxd3 37. Rxd3 Rc4 38. Ke4 b4 39. Rb3 Ke7 40. Rd3 f5+ 41. Kf3 Rc3 42. Ke2 Rxd3 43. Kxd3 b3 44. Kd2 Kd7 45. Kd3 Kc7 0-1

[Event "Santa Catarina State-ch 63rd"]
[Site "Timbo"]
[Date "2019.06.08"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Moretto, Heitor Frainer"]
[Result "0-1"]
[ECO "D91"]
[WhiteElo "1677"]
[BlackElo "1456"]
[PlyCount "56"]
[EventDate "2019.06.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 d5 5. Bg5 c6 6. e3 0-0 7. h3 h6 8. Bf4 Qa5 9. Bd3 c5 10. 0-0 cxd4 11. Nxd4 Rd8 12. Qb3 dxc4 13. Bxc4 e5 14. Bxf7+ Kh7 15. Qc2 exf4 16. Qxg6+ Kh8 17. Nb3 Qe5 18. exf4 Qxf4 19. Rad1 Nc6 20. Rfe1 Bf5 21. Qg3 Qxg3 22. fxg3 Rxd1 23. Rxd1 Ne5 24. Bd5 Nxd5 25. Rxd5 Bh7 26. Nd2 Nd3 27. Nc4 Nxb2 28. Nxb2 Bxc3 0-1

[Event "Santa Catarina State-ch 63rd"]
[Site "Timbo"]
[Date "2019.06.07"]
[Round "1"]
[White "Centeno, Daniel de Medeiros"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "D10"]
[BlackElo "1677"]
[PlyCount "74"]
[EventDate "2019.06.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. b3 Bf5 5. Bf4 e6 6. e3 Bb4 7. Rc1 Ne4 8. Nge2 Qa5 9. a3 Qxa3 10. Ra1 Qb2 11. Ra2 Bxc3+ 12. Nxc3 Qxc3+ 13. Ke2 Qb4 14. Rc2 Qxb3 15. Qc1 Ng3+ 16. Kd2 Qxc2+ 17. Qxc2 Bxc2 18. hxg3 Bg6 19. Bd6 a5 20. cxd5 cxd5 21. Bb5+ Nc6 22. Rc1 Kd7 23. Ba3 Rhc8 24. f3 Kd8 25. Bd3 Bxd3 26. Kxd3 Nb4+ 27. Kd2 Rxc1 28. Kxc1 Rc8+ 29. Kd1 Rc3 30. Bxb4 axb4 31. Kd2 Rc6 32. f4 b3 33. e4 b2 34. exd5 exd5 35. f5 b1Q 36. f6 Qe4 37. fxg7 Rc2+ 0-1

[Event "Santa Catarina State-ch 63rd"]
[Site "Timbo"]
[Date "2019.06.07"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "Carstens Dobuchak, Thiago"]
[Result "0-1"]
[ECO "E52"]
[WhiteElo "1677"]
[BlackElo "2138"]
[PlyCount "78"]
[EventDate "2019.06.07"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 0-0 5. Nf3 d5 6. e3 Nbd7 7. Bd3 b6 8. 0-0 Bb7 9. Qc2 Rc8 10. Rac1 Qe7 11. a3 Bxc3 12. Bxc3 Ne4 13. Qe2 Rfd8 14. cxd5 exd5 15. Rfd1 Ndf6 16. Nd2 h6 17. Nxe4 dxe4 18. Ba6 Bxa6 19. Qxa6 c6 20. h3 Nd5 21. Qa4 Qd7 22. Rd2 Re8 23. Rdc2 Re6 24. b4 h5 25. Bb2 b5 26. Qb3 g5 27. a4 a6 28. axb5 axb5 29. Rc5 Kh7 30. Bc3 Rg8 31. Qc2 h4 32. Bd2 Rgg6 33. Kh1 Qe8 34. Ra1 g4 35. hxg4 Rxg4 36. f3 Rgg6 37. fxe4 Rxe4 38. Rf1 Reg4 39. Rg1 Qe6 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.27"]
[Round "10"]
[White "Resende, Lucas B Massucato"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "1876"]
[BlackElo "1604"]
[PlyCount "115"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 Be6 8. Nge2 Nbd7 9. Qc2 h6 10. Bh4 c6 11. 0-0 Rc8 12. Rad1 c5 13. dxc5 Nxc5 14. Rd2 Nfe4 15. Bxe4 Nxe4 16. Bxe7 Qxe7 17. Rd4 Rfd8 18. Rfd1 Bf5 19. Qb3 Nxc3 20. Nxc3 Be6 21. h3 Qg5 22. Kh1 Rd7 23. Nxd5 Rc5 24. e4 f5 25. f3 Kh8 26. Qd3 fxe4 27. fxe4 Rf7 28. Qd2 Qg3 29. Rd3 Qh4 30. Qe3 Rc2 31. R3d2 Rf2 32. Rxc2 Rxc2 33. Nf4 Qg5 34. Qd3 Rxb2 35. Qd8+ Qxd8 36. Rxd8+ Bg8 37. e5 Rb4 38. e6 Kh7 39. e7 Bf7 40. Rf8 Rxf4 41. e8Q Bxe8 42. Rxf4 Bc6 43. Kh2 g5 44. Rf6 Kg7 45. Rd6 a6 46. g3 Kh7 47. Kg1 Kg7 48. Kf2 Kh7 49. Ke3 Bg2 50. h4 gxh4 51. gxh4 Bc6 52. Kd4 h5 53. Kc5 Kg7 54. Kb6 Be4 55. a4 Kf7 56. a5 Ke7 57. Kc7 Bf5 58. Rh6 1-0

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.26"]
[Round "9"]
[White "Leffeck, Mateus Bernal"]
[Black "Serafim Junior, Arnor"]
[Result "0-1"]
[ECO "A54"]
[WhiteElo "1604"]
[BlackElo "1857"]
[PlyCount "39"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d6 3. c4 Nbd7 4. Nc3 e5 5. dxe5 dxe5 6. e4 Bc5 7. Be2 0-0 8. 0-0 c6 9. Bg5 h6 10. Bh4 Qc7 11. Qc2 Re8 12. h3 Nh5 13. Na4 Bf8 14. Nh2 Nf4 15. Ng4 a5 16. Nc3 Bb4 17. Nd1 Nf8 18. a3 N8e6 19. Nde3 Nd4 20. axb4 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.26"]
[Round "8"]
[White "Ribeiro, Regina"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "D78"]
[WhiteElo "1936"]
[BlackElo "1604"]
[PlyCount "44"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 d5 3. g3 g6 4. Bg2 Bg7 5. c4 e6 6. Nc3 0-0 7. 0-0 Nbd7 8. b3 c6 9. Qc2 b6 10. Rd1 Ba6 11. Ne5 Rc8 12. f4 Qe7 13. Qd2 Nxe5 14. dxe5 Nd7 15. Bb2 Rfd8 16. cxd5 cxd5 17. Rac1 f5 18. Na4 Nc5 19. Ba3 Bf8 20. Qb2 Nxa4 21. Bxe7 Nxb2 22. Rxc8 Rxc8 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.25"]
[Round "7"]
[White "Leffeck, Mateus Bernal"]
[Black "Predebon, Eduardo Angonesi"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1604"]
[BlackElo "1825"]
[PlyCount "50"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. d5 b5 5. cxb5 a6 6. e3 axb5 7. Bxb5 Qa5+ 8. Nc3 Bb7 9. Bc4 Bg7 10. Bd2 Qb6 11. 0-0 0-0 12. e4 d6 13. Qb3 Nbd7 14. Rfe1 Rfb8 15. Qxb6 Nxb6 16. Bb3 Ba6 17. h3 Nbd7 18. Bg5 c4 19. Ba4 Nc5 20. Rab1 h6 21. Be3 Nfxe4 22. Nxe4 Nxa4 23. b3 cxb3 24. axb3 Bd3 25. Bxh6 Bxh6 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.24"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Cordioli, Jairo Ribeiro"]
[Result "0-1"]
[ECO "E82"]
[WhiteElo "1604"]
[BlackElo "1872"]
[PlyCount "60"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 b6 7. Bd3 c5 8. Nge2 Nc6 9. 0-0 e5 10. dxe5 dxe5 11. Nd5 Nxd5 12. exd5 Nd4 13. Rb1 f5 14. b4 Nxe2+ 15. Qxe2 cxb4 16. Rxb4 Qd6 17. Rfb1 e4 18. fxe4 fxe4 19. Bxe4 Bf5 20. Bxf5 Rxf5 21. Qd3 Be5 22. h3 Rc8 23. Rb5 Rf7 24. Bd4 Bxd4+ 25. Qxd4 Rf4 26. Qe3 Rfxc4 27. Re1 R4c5 28. Rxc5 Qxc5 29. Kf2 Qxe3+ 30. Rxe3 Rc2+ 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.24"]
[Round "6"]
[White "Vieira, Lucas Buenos"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B11"]
[BlackElo "1604"]
[PlyCount "78"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 c6 2. d3 d5 3. Nc3 d4 4. Nce2 e5 5. f4 Nd7 6. Nf3 Bd6 7. g3 h5 8. c3 c5 9. c4 Qf6 10. Qa4 Ne7 11. fxe5 Qxf3 12. Rg1 Bxe5 13. Bg2 Qf6 14. Rf1 Qc6 15. Qxc6 Nxc6 16. h3 Nf6 17. Bf3 Bxh3 18. Rg1 Bg4 19. Bxg4 Nxg4 20. Rb1 Nb4 21. Rh1 Nxd3+ 22. Kd1 Ndf2+ 23. Kc2 Nxh1 24. Bf4 Nhf2 25. Bxe5 Nxe5 26. Rf1 d3+ 27. Kd2 Nxc4+ 28. Kc3 dxe2 29. Re1 Nxb2 30. Rxe2 Nbd1+ 31. Kc4 h4 32. g4 h3 33. Re1 h2 34. Kxc5 Nd3+ 35. Kc4 Nxe1 36. e5 h1Q 37. g5 Rc8+ 38. Kb4 Rh4+ 39. Kb5 Qd5# 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.23"]
[Round "4"]
[White "De Lima, Lucas Taveira"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B18"]
[BlackElo "1604"]
[PlyCount "80"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Be3 e6 8. Bd3 Bxd3 9. Qxd3 Ngf6 10. c4 Rc8 11. 0-0 Bd6 12. Ne4 Nxe4 13. Qxe4 Nf6 14. Qd3 0-0 15. Rad1 h6 16. b3 c5 17. dxc5 Be7 18. Rd2 Qxd3 19. Rxd3 Bxc5 20. Bxc5 Rxc5 21. Rfd1 b5 22. cxb5 Rxb5 23. a4 Rb4 24. h3 Nd5 25. Ne5 Rc8 26. g3 Rc2 27. Nc4 Kf8 28. Ne3 Nxe3 29. Rxe3 Ke7 30. Rdd3 Rb2 31. Kg2 f5 32. Kf3 Kf6 33. h4 g5 34. hxg5+ hxg5 35. Kg2 Rb6 36. Rf3 g4 37. Rfe3 e5 38. Rd7 f4 39. gxf4 exf4 40. Re4 g3 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.22"]
[Round "2"]
[White "Asth, Luiz Carlos"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "B13"]
[BlackElo "1604"]
[PlyCount "62"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Nf3 g6 5. Be2 Bg7 6. 0-0 Nf6 7. Nc3 0-0 8. Bg5 Nc6 9. Qd2 Re8 10. Bh6 Bh8 11. Bb5 Bd7 12. Bxc6 Bxc6 13. Ne5 Rc8 14. Nxc6 Rxc6 15. Rfe1 Qa5 16. a3 e6 17. Bf4 Rec8 18. Be5 b5 19. Qg5 Ne8 20. Bxh8 Kxh8 21. Re3 b4 22. Na2 Rxc2 23. Nxb4 Rxb2 24. Qe7 Kg8 25. Nd3 Rbc2 26. Nc5 Qd2 27. Nd3 Rc1+ 28. Re1 Rxa1 29. Rxa1 Qxd3 30. Qxa7 Qc3 31. Rf1 Nd6 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.22"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Jorge, Denrick Cabral Jose"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "1604"]
[BlackElo "1903"]
[PlyCount "88"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 c5 8. Bb5+ Nd7 9. 0-0 0-0 10. Bb2 Qa5 11. Qa4 Qc7 12. e5 a6 13. Bxd7 Bxd7 14. Qb3 Rfd8 15. Rac1 Be6 16. Qa3 Bg4 17. Nd2 Bh6 18. f4 b6 19. Ba1 Qc8 20. Qb2 Rb8 21. Ne4 Qc6 22. Ng3 Be6 23. Qf2 Bc4 24. Rfd1 cxd4 25. cxd4 Qd5 26. Rc2 Rbc8 27. Qe3 Bxa2 28. Rdc1 Rxc2 29. Rxc2 Bc4 30. Ne4 b5 31. g4 b4 32. Qf3 a5 33. h4 a4 34. g5 Bf8 35. h5 Qe6 36. hxg6 Bd5 37. gxh7+ Kh8 38. f5 Bxe4 39. Qxe4 Qb3 40. Rg2 Qd1+ 41. Kh2 Qxa1 42. g6 Qxd4 43. Qxd4 Rxd4 44. gxf7 Rh4+ 0-1

[Event "Florianopolis op 5th"]
[Site "Florianopolis"]
[Date "2019.01.21"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Carstens Dobuchak, Thiago"]
[Result "0-1"]
[ECO "A23"]
[WhiteElo "1604"]
[BlackElo "2121"]
[PlyCount "74"]
[EventDate "2019.01.21"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "BRA"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.28"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.28"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. g3 c6 4. Bg2 Na6 5. e3 d5 6. cxd5 cxd5 7. d4 e4 8. Nge2 Be7 9. 0-0 0-0 10. Bd2 Bg4 11. Qb3 Qd7 12. Nf4 Rfd8 13. Rfc1 Rac8 14. a3 Nc7 15. Bf1 g5 16. Ng2 Bh3 17. Be2 Bd6 18. Nb5 Nxb5 19. Qxb5 Kf8 20. Bb4 Qxb5 21. Bxd6+ Rxd6 22. Bxb5 Rb6 23. Ba4 Rxb2 24. Rcb1 Rxb1+ 25. Rxb1 Rc7 26. Ne1 Ke7 27. Nc2 Bd7 28. Bb3 Kd6 29. Kf1 Bb5+ 30. Ke1 Bd3 31. Rb2 Nd7 32. Kd2 Nb6 33. Nb4 Bc4 34. Kc3 a5 35. Nc2 a4 36. Bxc4 Nxc4 37. Ra2 Nxa3+ 0-1

[Event "Curitiba Fexpar op 1st"]
[Site "Curitiba"]
[Date "2018.11.03"]
[Round "5"]
[White "Santana, Expedito"]
[Black "Leffeck, Mateus Bernal"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1537"]
[BlackElo "1619"]
[PlyCount "100"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. b4 f5 2. Bb2 Nf6 3. d3 d6 4. Nd2 e5 5. Ngf3 h6 6. e3 Be6 7. c4 Nbd7 8. g3 c6 9. Nh4 Kf7 10. Bg2 d5 11. Nhf3 Qc7 12. Qc2 Bxb4 13. 0-0 Rac8 14. cxd5 Nxd5 15. Nc4 Bd6 16. a3 b5 17. Nxd6+ Qxd6 18. Rfc1 Rhf8 19. e4 N5f6 20. exf5 Bxf5 21. Ne1 Nd5 22. Qb3 Be6 23. Qd1 Kg8 24. Rc2 c5 25. Rac1 N5f6 26. Qe2 Bd5 27. Nf3 Rfe8 28. Re1 e4 29. dxe4 Bxe4 30. Rd2 Qc6 31. Bxf6 Nxf6 32. Qd1 Kh7 33. Nh4 Bxg2 34. Nxg2 c4 35. Rxe8 Rxe8 36. Ne3 Qc5 37. Qc2+ Kh8 38. a4 c3 39. Rd3 b4 40. Qb3 Rxe3 41. fxe3 c2 42. Rd8+ Kh7 43. Qd3+ g6 44. Rd7+ Nxd7 45. Qxd7+ Kg8 46. Qe6+ Kg7 47. Qd7+ Kf6 48. Qd8+ Qe7 49. Qd4+ Qe5 50. Qd8+ Kf5 0-1

[Event "Curitiba Fexpar op 1st"]
[Site "Curitiba"]
[Date "2018.11.02"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "Ramazzotte, Alexandre Franco"]
[Result "0-1"]
[ECO "D30"]
[WhiteElo "1619"]
[BlackElo "1800"]
[PlyCount "36"]
[EventDate "2018.11.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. a3 dxc4 5. e3 a6 6. Bxc4 b5 7. Bd3 Bb7 8. Nc3 Nbd7 9. 0-0 c5 10. e4 b4 11. axb4 cxb4 12. Ne2 Nxe4 13. Re1 Be7 14. Nf4 Nef6 15. Ng5 Nf8 16. Ngxe6 Nxe6 17. Nxe6 fxe6 18. Rxe6 Qd5 0-1

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.30"]
[Round "6"]
[White "Bonfim, Regina Rodrigues"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "1729"]
[BlackElo "1624"]
[PlyCount "65"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. h4 Bg7 5. Nh3 d6 6. c3 c6 7. Nd2 e5 8. dxe5 dxe5 9. Qb3 Qe7 10. e4 Be6 11. Qc2 0-0 12. Ng5 Bd7 13. Qb3+ Kh8 14. Qxb7 Qc5 15. Qb3 Qb6 16. Nf7+ Kg8 17. Nh6+ Kh8 18. Nf7+ Kg8 19. Qxb6 axb6 20. Nxe5 Re8 21. Nxd7 Nbxd7 22. 0-0 Rac8 23. exf5 gxf5 24. Nc4 Re6 25. Be3 b5 26. Nd2 c5 27. Nb3 c4 28. Nd4 Re5 29. Bf4 Ree8 30. Nxf5 Bf8 31. Rfe1 Rxe1+ 32. Rxe1 Bc5 33. Ne7+ 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.30"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "Kim, Thiago"]
[Result "1-0"]
[ECO "E24"]
[WhiteElo "1624"]
[BlackElo "1527"]
[PlyCount "79"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 e6 3. c4 b6 4. Nc3 Bb4 5. a3 Bxc3+ 6. bxc3 Bb7 7. Bg5 d6 8. e3 Nbd7 9. Be2 0-0 10. 0-0 Re8 11. Bd3 h6 12. Bh4 e5 13. Nd2 c6 14. f3 d5 15. Qc2 Qc7 16. Bg3 Nh5 17. Bf2 Nhf6 18. Rac1 Ba6 19. cxd5 Bxd3 20. Qxd3 cxd5 21. e4 dxe4 22. fxe4 Rad8 23. d5 Nc5 24. Qe2 Rc8 25. Bh4 Nfd7 26. Rf3 f6 27. Rg3 Nb7 28. Rf1 Qc5+ 29. Kh1 Qe7 30. Qh5 Kh8 31. Rg6 Rxc3 32. Bxf6 Nxf6 33. Rfxf6 Rc1+ 34. Nf1 Rf8 35. Rxh6+ gxh6 36. Qxh6+ Kg8 37. Rg6+ Kf7 38. Rg7+ Ke8 39. Rxe7+ Kxe7 40. Qxc1 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.29"]
[Round "4"]
[White "De Oliveira, Gustavo Alfredo Bue"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "E76"]
[WhiteElo "2030"]
[BlackElo "1624"]
[PlyCount "71"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 Nbd7 8. Bd3 b5 9. Nxb5 a6 10. Nc3 e6 11. 0-0 Bb7 12. h3 Qc7 13. Re1 exd5 14. cxd5 Rfe8 15. Be3 Rab8 16. Bf2 Bc8 17. Rb1 Nb6 18. Qd2 Bb7 19. Rbd1 Rbd8 20. Bh4 Rd7 21. Qf2 Rf8 22. g4 h5 23. Bxf6 Bxf6 24. gxh5 gxh5 25. Kh2 Kh8 26. Ng5 Bxg5 27. fxg5 f6 28. Rg1 Rdf7 29. g6 Rg7 30. Qf3 Qe7 31. Qxh5+ Kg8 32. Rdf1 Bc8 33. Rf4 Qe5 34. Qxe5 fxe5 35. Rxf8+ Kxf8 36. h4 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.29"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Blau, Emily Camile"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1624"]
[BlackElo "1248"]
[PlyCount "103"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 0-0 6. e3 Nc6 7. Rc1 Bd6 8. Bg5 h6 9. Bh4 Re8 10. Bd3 dxc4 11. Bxc4 e5 12. 0-0 exd4 13. Nxd4 Bg4 14. Bxf6 Qxf6 15. Qxg4 Nxd4 16. Qxd4 Qxd4 17. exd4 Rad8 18. Rfe1 Bf4 19. Rxe8+ Rxe8 20. Rd1 a6 21. d5 Kf8 22. h3 b5 23. Bb3 b4 24. Nb1 Re2 25. g3 Be5 26. Kf1 Re4 27. Nd2 Rd4 28. Nf3 Rxd1+ 29. Bxd1 Bxb2 30. Ke2 Ke7 31. Kd3 Kd6 32. Kc4 Bc3 33. g4 c6 34. dxc6 Kxc6 35. Nd4+ Bxd4 36. Kxd4 Kd6 37. Bb3 f6 38. Ke4 a5 39. Kf5 Ke7 40. Kg6 Kf8 41. f4 a4 42. Bxa4 Kg8 43. Bb3+ Kh8 44. h4 f5 45. Kxf5 Kh7 46. Ke5 g6 47. Kf6 h5 48. gxh5 gxh5 49. Ke7 Kg6 50. Bc2+ Kg7 51. f5 Kh6 52. f6 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.28"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Kuster, Michel Thiago"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1624"]
[BlackElo "1644"]
[PlyCount "49"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Qxd5 4. Nc3 Qd8 5. e4 Nc6 6. d5 Ne5 7. f4 Ng6 8. f5 Ne5 9. Qd4 Neg4 10. e5 Nxd5 11. Qxd5 Qxd5 12. Nxd5 Rb8 13. h3 Nxe5 14. Bf4 f6 15. Nxc7+ Kf7 16. g4 e6 17. Bxe5 fxe5 18. Bc4 Kf6 19. Nxe6 Bxe6 20. Bxe6 Bb4+ 21. Ke2 Rbd8 22. g5+ Kxg5 23. Nf3+ Kf4 24. Rhg1 e4 25. Rg4# 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.09.28"]
[Round "2"]
[White "Moyses Sobrinho, Elias"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "1915"]
[BlackElo "1624"]
[PlyCount "69"]
[EventDate "2018.09.28"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. e3 Nbd7 6. h3 Bd6 7. Be2 0-0 8. a3 Re8 9. cxd5 exd5 10. 0-0 Nf8 11. b4 Ng6 12. Qc2 Ne4 13. Nxe4 dxe4 14. Nd2 Bxh3 15. Nxe4 Bf5 16. Bd3 Bxe4 17. Bxe4 Qh4 18. f4 Re7 19. Bd3 Rae8 20. Qf2 Qxf2+ 21. Rxf2 Bc7 22. a4 a5 23. b5 Bb6 24. bxc6 bxc6 25. Rb1 Ba7 26. Rc2 Rc8 27. Bd2 Ree8 28. Ba6 Rcd8 29. Rxc6 Ne7 30. Rc7 Bb8 31. Rcb7 Nd5 32. Bc4 Nc7 33. Bxa5 Rc8 34. Bd2 Red8 35. Ba5 1-0

[Event "Blumenau STD op"]
[Site "Blumenau"]
[Date "2018.05.25"]
[Round "1"]
[White "Valim, Luiz Claudio"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "1927"]
[BlackElo "1720"]
[PlyCount "63"]
[EventDate "2018.05.25"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. Ng3 Bg6 6. h4 h6 7. h5 Bh7 8. Bd3 Bxd3 9. cxd3 Nd7 10. 0-0 Rc8 11. Qg4 c5 12. Be3 cxd4 13. Bxd4 Qg5 14. Qh3 Bc5 15. Bxc5 Rxc5 16. f4 Qe7 17. f5 Rc6 18. d4 Qb4 19. Qg4 Qxb2 20. fxe6 fxe6 21. Na3 Qxa3 22. Qxg7 Qe3+ 23. Kh2 Qg5 24. Qxh8 Qh4+ 25. Kg1 Qxg3 26. Rf3 Qg5 27. Raf1 Rc2 28. R3f2 Rc3 29. Qh7 Rc6 30. Qb1 b6 31. Qb5 Rc7 32. Rf8+ 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.04"]
[Round "6"]
[White "Muller, Joao Eduardo Gomes"]
[Black "Leffeck, Mateus Bernal"]
[Result "1/2-1/2"]
[ECO "D15"]
[BlackElo "1745"]
[PlyCount "89"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. Nc3 Nf6 4. cxd5 cxd5 5. Bf4 a6 6. Nf3 e6 7. g3 Nc6 8. Bg2 Bd6 9. Bxd6 Qxd6 10. 0-0 0-0 11. Qc2 e5 12. dxe5 Nxe5 13. Nxe5 Qxe5 14. e3 Be6 15. Rfe1 Rac8 16. Qd3 Rfe8 17. e4 dxe4 18. Nxe4 Red8 19. Nxf6+ Qxf6 20. Qf3 Qxf3 21. Bxf3 Rc7 22. b3 g6 23. h4 Kg7 24. Rac1 Rdc8 25. Rxc7 Rxc7 26. h5 g5 27. g4 b6 28. Be2 Rc2 29. Bxa6 Rxa2 30. Be2 Rb2 31. Bc4 Bxg4 32. Re5 Kf6 33. Rb5 Bxh5 34. Rxb6+ Kg7 35. Rb5 h6 36. f4 Be2 37. Bxe2 Rxe2 38. fxg5 h5 39. Rb8 Re5 40. b4 Rxg5+ 41. Kh2 Kf6 42. b5 Ke7 43. Rb7+ Ke8 44. b6 Rb5 45. Rb8+ 1/2-1/2

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.03"]
[Round "5"]
[White "Leffeck, Mateus Bernal"]
[Black "De Camargo, Luan Botta"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1745"]
[PlyCount "70"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. Nc3 0-0 6. d3 h6 7. Be3 Nd4 8. Nxe5 d6 9. Ng6 Re8 10. Nf4 Ng4 11. Bxd4 Bxd4 12. Qf3 Qh4 13. h3 Ne5 14. Qd1 Qxf4 15. Ne2 Qg5 16. Nxd4 Bxh3 17. g3 Bxf1 18. Kxf1 c5 19. Ne2 Qg4 20. Nf4 Qxd1+ 21. Rxd1 Nxc4 22. dxc4 Rxe4 23. b3 Rd8 24. Ne2 Rde8 25. Nc3 Rd4 26. Rxd4 cxd4 27. Nb5 d5 28. cxd5 Rd8 29. Nc7 Rd7 30. Nb5 Rxd5 31. Nxa7 Ra5 32. Nc8 Rxa2 33. Nd6 Rxc2 34. Nxb7 d3 35. Na5 Rc1+ 0-1

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.03"]
[Round "4"]
[White "Salvadego, Matheus Henrique De"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "1543"]
[BlackElo "1745"]
[PlyCount "83"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 c6 2. e4 d5 3. exd5 cxd5 4. c4 dxc4 5. Bxc4 Bf5 6. Qb3 Nf6 7. Bxf7+ Kd7 8. Qxb7+ Qc7 9. Qxc7+ Kxc7 10. Bf4+ Kd8 11. Bc4 e6 12. Nf3 Nbd7 13. 0-0 Nb6 14. Be2 Nbd5 15. Be5 Ne8 16. Nc3 Bd6 17. Nxd5 exd5 18. Bb5 Bxe5 19. Nxe5 Nd6 20. Bc6 Rb8 21. Bxd5 Rxb2 22. Bb3 Re8 23. Nc6+ Kc7 24. Rac1 Kb6 25. Ne5 Rc8 26. Rxc8 Bxc8 27. Rc1 Bb7 28. Nd7+ Ka5 29. h3 Nb5 30. d5 Rd2 31. Rc4 Nd4 32. Rc7 Nxb3 33. Rxb7 Nc1 34. Rxa7+ Kb5 35. a4+ Kb4 36. Nb6 Nb3 37. Rxg7 Ka5 38. Nc4+ Ka6 39. Nxd2 Nxd2 40. Rxh7 Nc4 41. Rh6+ Kb7 42. g4 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.02"]
[Round "2"]
[White "Herrera, Jose Vinicius dos S"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D20"]
[WhiteElo "1458"]
[BlackElo "1745"]
[PlyCount "89"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nc3 e5 4. dxe5 Qxd1+ 5. Kxd1 Nc6 6. Nf3 Bf5 7. e4 0-0-0+ 8. Bd2 Bg4 9. Kc2 Bxf3 10. gxf3 Nxe5 11. f4 Nf3 12. Be3 Nd4+ 13. Bxd4 Rxd4 14. Rd1 Bc5 15. Rxd4 Bxd4 16. Bxc4 Bxf2 17. Bxf7 Be3 18. Be6+ Kb8 19. Nd5 Bb6 20. Nxb6 cxb6 21. Rg1 Nf6 22. Rxg7 Nxe4 23. Rg8+ Rxg8 24. Bxg8 h6 25. f5 Kc7 26. Kd3 Nd6 27. f6 Kd7 28. Bd5 b5 29. Ke3 Nc4+ 30. Kd4 Nxb2 31. Kc5 Na4+ 32. Kxb5 Nc3+ 33. Kc5 b6+ 34. Kd4 Nxd5 35. Kxd5 a6 36. f7 Ke7 37. Kc6 b5 38. f8Q+ Kxf8 39. Kb6 Ke7 40. Kxa6 b4 41. Kb5 b3 42. axb3 Kd6 43. b4 h5 44. Kb6 h4 45. b5 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.02"]
[Round "3"]
[White "Leffeck, Mateus Bernal"]
[Black "Marcolino, Matheus Tameirao"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1745"]
[BlackElo "1822"]
[PlyCount "93"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nb6 5. Nc3 Nc6 6. Bb5 Bd7 7. Nf3 e6 8. a3 a6 9. Bd3 f6 10. 0-0 Na7 11. e5 Be7 12. Qc2 f5 13. b3 c6 14. Be3 Qc7 15. Rfc1 h6 16. Ne2 Nd5 17. Bd2 Rg8 18. Nf4 Nxf4 19. Bxf4 0-0-0 20. d5 exd5 21. Bxf5 Bxf5 22. Qxf5+ Kb8 23. e6 Bd6 24. Bxd6 Qxd6 25. Re1 Nc8 26. Ne5 Ne7 27. Qh3 Rde8 28. Nf7 Qc7 29. Rac1 Ng6 30. g3 Ka8 31. Qh5 Ne7 32. a4 Kb8 33. b4 Ka7 34. b5 a5 35. bxc6 bxc6 36. Qe5 Qb7 37. Nd6 Qb8 38. Rb1 Qd8 39. Qd4+ Ka6 40. Nxe8 Rxe8 41. Qxg7 h5 42. Rb2 h4 43. Qd4 Nf5 44. Qd3+ Ka7 45. Qxf5 hxg3 46. fxg3 Qc8 47. Qf7+ 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2017.06.01"]
[Round "1"]
[White "Leffeck, Mateus Bernal"]
[Black "Sousa, Alvaro Cristiano Mi"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "1745"]
[BlackElo "1708"]
[PlyCount "48"]
[EventDate "2017.06.01"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 179 Extra"]
[Source "ChessBase"]
[SourceDate "2017.08.23"]
[SourceVersion "1"]
[SourceVersionDate "2017.08.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bd2 b6 6. e3 Bxc3 7. Bxc3 Bb7 8. Bd3 Nbd7 9. 0-0 0-0 10. Re1 Rc8 11. Nd2 c5 12. dxc5 Nxc5 13. Be2 Nfe4 14. Nxe4 Nxe4 15. Bb4 Re8 16. Rc1 Qg5 17. cxd5 Rxc1 18. Qxc1 Rc8 19. Qd1 Bxd5 20. Bf3 Qh4 21. Qd3 Qxf2+ 22. Kh1 Qxf3 23. Qf1 Qxf1+ 24. Rxf1 Bxa2 0-1

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.12"]
[Round "6"]
[White "Leffeck, Mateus Bernal"]
[Black "Lourenco, Gustavo Teixeira"]
[Result "1-0"]
[ECO "C54"]
[PlyCount "59"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. b4 Be7 6. Ng5 0-0 7. d3 d5 8. exd5 Nxd5 9. h4 Bf6 10. a3 Re8 11. Be3 Be6 12. Nxe6 fxe6 13. Bg5 Bxg5 14. hxg5 Qxg5 15. Qh5 Qxh5 16. Rxh5 Nf4 17. Rh2 Rad8 18. Kd2 a6 19. a4 Kh8 20. g3 Ng6 21. Na3 a5 22. b5 Nce7 23. Bxe6 Nd5 24. Rah1 Nf8 25. Bf7 Nf6 26. Bxe8 Rxe8 27. f3 Ne6 28. Nc4 Ng5 29. Ke2 b6 30. Ne3 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.11"]
[Round "5"]
[White "Goncalves, Mateus"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D06"]
[PlyCount "73"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 e6 6. Nf3 Bb4 7. Bd3 c5 8. dxc5 Bxc5 9. 0-0 0-0 10. Qc2 g6 11. Bg5 Be7 12. Bb5 Bd7 13. Rad1 Qc8 14. e5 Bxb5 15. exf6 Bxf6 16. Bxf6 Bxf1 17. Kxf1 Qc4+ 18. Kg1 Nc6 19. Qd2 Ne7 20. Bxe7 Rfc8 21. Bf6 Kf8 22. Qh6+ Ke8 23. Qxh7 Qb4 24. a3 Qc5 25. b4 Qf8 26. Bg7 Qxg7 27. Qxg7 Ke7 28. Ng5 Rf8 29. Nce4 Rac8 30. Qf6+ Ke8 31. Nd6+ Kd7 32. Nxc8+ Kc6 33. Qc3+ Kb5 34. Nd6+ Ka4 35. Qc2+ Kxa3 36. Ra1+ Kxb4 37. Qc4# 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.11"]
[Round "4"]
[White "Leffeck, Mateus Bernal"]
[Black "Goncalves, Oswaldo Pirola"]
[Result "0-1"]
[ECO "B12"]
[BlackElo "1434"]
[PlyCount "18"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. f3 e6 5. Bd3 Bxd3 6. cxd3 Qh4+ 7. Kf1 Qxd4 8. Qb3 Bc5 9. f4 Qf2# 0-1

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.10"]
[Round "3"]
[White "Bartmeyer, Jose Francisco"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1800"]
[PlyCount "91"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Bg4 3. Bf4 Nf6 4. e3 Nc6 5. Be2 e6 6. h3 Bf5 7. 0-0 Bd6 8. Bxd6 cxd6 9. Nc3 0-0 10. a3 e5 11. Nh2 Re8 12. Ng4 Nxg4 13. Bxg4 Bxg4 14. Qxg4 Qc8 15. Qe2 exd4 16. Nxd5 dxe3 17. Nxe3 Nd4 18. Qd3 Ne6 19. Qxd6 Rd8 20. Qb4 Qc5 21. Qxb7 Rdb8 22. Qe4 Rd8 23. Rfd1 Rxd1+ 24. Rxd1 Rd8 25. Rxd8+ Nxd8 26. b4 Qc6 27. Qxc6 Nxc6 28. c4 Nd4 29. c5 Ne2+ 30. Kf1 Nd4 31. Ke1 Kf8 32. Kd2 Ke7 33. Kd3 Nb5 34. a4 Nc7 35. Kc4 Kd7 36. Nd5 Nxd5 37. Kxd5 Kc7 38. b5 f5 39. a5 g6 40. b6+ axb6 41. axb6+ Kb7 42. Kd6 Kb8 43. Kd7 Kb7 44. c6+ Kxb6 45. c7 Kc5 46. c8Q+ 1-0

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.10"]
[Round "2"]
[White "Leffeck, Mateus Bernal"]
[Black "Cezar, Ricardo de Almeida"]
[Result "0-1"]
[ECO "C42"]
[BlackElo "1578"]
[PlyCount "112"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. Nc3 Nxc3 7. Qxe7+ Bxe7 8. bxc3 Nc6 9. g3 Bf5 10. d3 Bf6 11. Rb1 Bxc3+ 12. Bd2 Bxd2+ 13. Nxd2 Rb8 14. Bg2 0-0 15. 0-0 Nd4 16. Be4 Bxe4 17. dxe4 Nxc2 18. Rfc1 Nd4 19. Rxc7 Rfc8 20. Rcxb7 Nc6 21. Nc4 Rd8 22. Nxd6 Rxb7 23. Nxb7 Rb8 24. Rc1 Ne5 25. Nd6 g6 26. Rc8+ Rxc8 27. Nxc8 a5 28. a4 f6 29. f4 Nc4 30. Ne7+ Kf7 31. Nd5 Ke6 32. Nc3 g5 33. fxg5 fxg5 34. Nd5 Ke5 35. Nc3 Nd2 36. Kf2 Nxe4+ 37. Nxe4 Kxe4 38. Kg2 h5 39. h3 Kd4 40. Kf2 Kc4 41. Ke3 Kb4 42. Kd3 Kxa4 43. Kc3 Kb5 44. Kb3 a4+ 45. Ka3 Kc4 46. Kxa4 Kd3 47. Kb5 Ke3 48. Kc4 Kf3 49. g4 hxg4 50. hxg4 Kxg4 51. Kd3 Kh3 52. Ke2 g4 53. Kf2 Kh2 54. Ke3 g3 55. Ke4 g2 56. Ke5 g1Q 0-1

[Event "BRA-ch U16"]
[Site "Itajai"]
[Date "2016.06.09"]
[Round "1"]
[White "Valcarcel, Victor Ignacio Sant"]
[Black "Leffeck, Mateus Bernal"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1692"]
[PlyCount "55"]
[EventDate "2016.06.09"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Nc3 d6 6. 0-0 Be6 7. Bxe6 fxe6 8. Be3 Nd4 9. Bxd4 Bxd4 10. Qd2 d5 11. exd5 exd5 12. Nxd4 exd4 13. Rfe1+ Kf7 14. Nb5 c5 15. Qf4 Qd7 16. Nd6+ Kf8 17. Re2 Kg8 18. Rae1 Nh5 19. Qf3 Nf6 20. Qg3 Nh5 21. Qe5 Nf6 22. Qe7 Qxe7 23. Rxe7 h6 24. Rxb7 Rd8 25. Nf7 Re8 26. Rxe8+ Nxe8 27. Nxh8 Kxh8 28. Rb8 1-0

