[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.13"]
[Round "6.30"]
[White "Pereira, Victor Hugo Moreira"]
[Black "Da Silveira, Welinthon"]
[Result "1-0"]
[ECO "D00"]
[PlyCount "43"]
[EventDate "2011.06.10"]
[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. Nc3 Nf6 3. Nf3 e6 4. e3 Bb4 5. Bd2 0-0 6. Bd3 Bxc3 7. bxc3 h6 8. 0-0 Nc6 9. e4 dxe4 10. Bxe4 Nxe4 11. Be3 b6 12. Ne5 Nxe5 13. dxe5 Ba6 14. Qg4 Bxf1 15. Kxf1 Ng5 16. Rd1 Qc8 17. h4 Qa6+ 18. c4 Nh7 19. Bxh6 g6 20. h5 Rfd8 21. Re1 f5 22. Qxg6+ 1-0

[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.12"]
[Round "5.30"]
[White "De Abreu, Rafael"]
[Black "Da Silveira, Welinthon"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1840"]
[PlyCount "29"]
[EventDate "2011.06.10"]
[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 Nc6 3. Nc3 Nf6 4. Bc4 Ng4 5. 0-0 Bc5 6. d3 Bxf2+ 7. Kh1 Bc5 8. Ng5 Nf2+ 9. Rxf2 Bxf2 10. Nxf7 Qe7 11. Nxh8 d6 12. Qh5+ Kd8 13. Nf7+ Kd7 14. Bg5 Qe8 15. Qh3+ 1-0

[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.11"]
[Round "3.28"]
[White "Da Silveira, Welinthon"]
[Black "Bortoloso, Geovani"]
[Result "0-1"]
[ECO "C44"]
[PlyCount "80"]
[EventDate "2011.06.10"]
[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 Nc6 3. g3 d6 4. Bg2 Bg4 5. 0-0 Nf6 6. Nc3 Qd7 7. d3 Nd4 8. Nd5 Nxd5 9. exd5 Qf5 10. Nh4 Bxd1 11. Nxf5 Nxf5 12. Rxd1 0-0-0 13. Bh3 g6 14. Bg5 Re8 15. Bf6 Rg8 16. Re1 Kb8 17. c3 a6 18. d4 Bh6 19. dxe5 dxe5 20. Bxe5 Nd6 21. Bd7 Re7 22. Ba4 b5 23. Bd1 Rge8 24. f4 f6 25. Bg4 fxe5 26. fxe5 Rxe5 27. Rf1 Rxd5 28. Bd7 Re7 29. Bc6 Rd2 30. Rf6 Rxb2 31. a3 Bg7 32. Rf4 Bxc3 33. Rf8+ Ka7 34. Bg2 Ree2 35. Ra8+ Kb6 36. Rb8+ Ka5 37. Bf1 Rxh2 38. Rc1 Ne4 39. Rc8 c5 40. Rf8 Bd4+ 0-1

[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.11"]
[Round "4.30"]
[White "Da Silveira, Welinthon"]
[Black "Farhat, Mohamed Abdallah"]
[Result "0-1"]
[ECO "D00"]
[PlyCount "28"]
[EventDate "2011.06.10"]
[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. e3 Nf6 3. Nc3 c5 4. dxc5 e5 5. Nf3 Nc6 6. Bb5 Bxc5 7. 0-0 Bg4 8. Qe1 Bxf3 9. gxf3 0-0 10. f4 Qc8 11. fxe5 Nxe5 12. Ne2 Nf3+ 13. Kh1 Qh3 14. Nf4 Qxh2# 0-1

[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.10"]
[Round "1.30"]
[White "Da Silveira, Welinthon"]
[Black "Rosa, Joao Paulo"]
[Result "0-1"]
[ECO "B10"]
[PlyCount "104"]
[EventDate "2011.06.10"]
[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. Nf3 d5 3. exd5 cxd5 4. Nc3 Nf6 5. Bd3 Nc6 6. Bb5 Bd7 7. 0-0 e6 8. Ng5 Bd6 9. d4 0-0 10. Na4 Qc7 11. Nc5 Bxh2+ 12. Kh1 Bf4 13. Nxd7 Nxd7 14. Qd3 Nf6 15. Qh3 Bxc1 16. Raxc1 Nxd4 17. Bd3 h6 18. Bh7+ Nxh7 19. Nxh7 Kxh7 20. Qd3+ Nf5 21. g4 Qf4 22. gxf5 Qe4+ 23. f3 Qxd3 24. cxd3 exf5 25. a4 b6 26. b3 Rfe8 27. Rc7 f6 28. Rd7 Red8 29. Rc7 a5 30. Re1 Re8 31. Rxe8 Rxe8 32. Rd7 Re3 33. Rxd5 Rxf3 34. Kg2 Rf4 35. Kg3 Rb4 36. Rxf5 Rxb3 37. Rf3 Rb4 38. Rf4 Rxf4 39. Kxf4 Kg8 40. d4 Kf7 41. d5 Ke7 42. Ke4 Kd6 43. Kd4 g5 44. Kc4 g4 45. Kb5 g3 46. Kxb6 g2 47. Kxa5 g1Q 48. Kb5 Kxd5 49. a5 Qc5+ 50. Ka6 Qb4 51. Ka7 Kc6 52. Ka8 Qb7# 0-1

[Event "BRA-ch U16"]
[Site "Foz do Iguacu"]
[Date "2011.06.10"]
[Round "2.30"]
[White "Oliveira, Gabriel Barbosa"]
[Black "Da Silveira, Welinthon"]
[Result "1-0"]
[ECO "C68"]
[PlyCount "99"]
[EventDate "2011.06.10"]
[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 Nc6 3. Bb5 Nf6 4. d3 a6 5. Bxc6 dxc6 6. Nxe5 Be6 7. h3 Bb4+ 8. Nc3 0-0 9. Qf3 Nd7 10. Nxd7 Bxd7 11. Bd2 h6 12. Qg3 Bd6 13. f4 h5 14. 0-0-0 h4 15. Qf2 b6 16. g3 Bc5 17. d4 hxg3 18. Qxg3 Bxd4 19. Ne2 c5 20. c3 Ba4 21. b3 Bb5 22. Nxd4 cxd4 23. Rhg1 g6 24. f5 Be2 25. Rde1 Bh5 26. e5 Qe7 27. Kb2 Kh8 28. Bg5 dxc3+ 29. Kc2 f6 30. Bxf6+ Rxf6 31. exf6 Qxf6 32. fxg6 Qf5+ 33. Qd3 Qf2+ 34. Kxc3 Qf6+ 35. Qd4 Qxd4+ 36. Kxd4 Rd8+ 37. Kc3 Kg7 38. Re3 Bxg6 39. h4 Kf8 40. Rxg6 Kf7 41. h5 c5 42. Rf3+ Ke7 43. Rg5 Kd6 44. Rd3+ Kc7 45. Rxd8 Kxd8 46. h6 Kd7 47. h7 Kc6 48. h8Q a5 49. Qc8+ Kb5 50. a4# 1-0

