[Event "BRA-ch U20"]
[Site "Concordia"]
[Date "2021.10.03"]
[Round "6"]
[White "Ribeiro, Guilherme"]
[Black "Araujo, Lucas Santos"]
[Result "1-0"]
[ECO "C25"]
[PlyCount "39"]
[EventDate "2021.09.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nc3 e5 2. e4 Nc6 3. Nd5 Nf6 4. Bc4 Nxe4 5. Qh5 Na5 6. Bd3 c6 7. Bxe4 g6 8. Qxe5+ Be7 9. Qxh8+ Bf8 10. Nf6+ Ke7 11. Nxh7 d5 12. d3 Bf5 13. Bg5+ Kd7 14. Bxd8 Rxd8 15. Nxf8+ Kc7 16. Qg7 dxe4 17. Qxf7+ Kc8 18. Ne6 Rd7 19. Qf8+ Rd8 20. Qxd8# 1-0

[Event "BRA-ch U20"]
[Site "Concordia"]
[Date "2021.10.02"]
[Round "5"]
[White "Kulkamp, Victor Silva"]
[Black "Ribeiro, Guilherme"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1737"]
[PlyCount "55"]
[EventDate "2021.09.30"]
[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 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 c6 5. Nf3 d5 6. Qc2 Be6 7. Nbd2 Nbd7 8. 0-0 Nb6 9. b3 Bf5 10. Qd1 Qd6 11. c5 Qc7 12. cxb6 axb6 13. Ne5 c5 14. Ndf3 g5 15. Bxg5 Ne4 16. Bf4 f6 17. Ng6 Nc3 18. Bxc7 Nxd1 19. Nxh8 Nc3 20. Bxb6 Bxh8 21. Bxc5 Ne4 22. Nh4 Bg4 23. f3 Nc3 24. fxg4 f5 25. Nxf5 e6 26. Nd6+ Ke7 27. Rf7+ Kd8 28. Bb6# 1-0

[Event "BRA-ch U20"]
[Site "Concordia"]
[Date "2021.10.02"]
[Round "4"]
[White "Ribeiro, Guilherme"]
[Black "Scheer, Flavius Augusto"]
[Result "0-1"]
[ECO "C46"]
[BlackElo "1536"]
[PlyCount "58"]
[EventDate "2021.09.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bc5 4. Qe2 Nf6 5. d3 0-0 6. Bg5 h6 7. Be3 Nd4 8. Bxd4 exd4 9. Nd5 Nxd5 10. exd5 Re8 11. a3 Rxe2+ 12. Bxe2 d6 13. h3 Qe7 14. b4 Bb6 15. a4 a5 16. b5 Bc5 17. 0-0 Bxh3 18. gxh3 Qxe2 19. Kg2 Qxc2 20. Rfe1 Qxd3 21. h4 Qf5 22. Kg3 h5 23. Kh2 Qf4+ 24. Kg2 Qg4+ 25. Kh2 Qxf3 26. Rac1 d3 27. Rf1 Bxf2 28. b6 Qg3+ 29. Kh1 Qh3# 0-1

[Event "BRA-ch U20"]
[Site "Concordia"]
[Date "2021.10.01"]
[Round "2"]
[White "Bittencourt, Arian G Decezare"]
[Black "Ribeiro, Guilherme"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1301"]
[PlyCount "43"]
[EventDate "2021.09.30"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "BRA"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. Bc4 Nc6 4. d3 Nf6 5. Ng5 Be6 6. Nxe6 fxe6 7. Bxe6 Nd4 8. Bc4 h6 9. c3 c5 10. cxd4 cxd4 11. Bb5+ Ke7 12. 0-0 Qc8 13. f4 g5 14. fxe5 dxe5 15. Qf3 Bg7 16. Qf5 Qc7 17. Bc4 Qd6 18. Qg6 Rhf8 19. Qxg7+ Ke8 20. b3 a6 21. Ba3 Qd7 22. Qxf8# 1-0

[Event "BRA-ch U20"]
[Site "Concordia"]
[Date "2021.09.30"]
[Round "1"]
[White "Ribeiro, Guilherme"]
[Black "Constantino, Pedro Henrique"]
[Result "0-1"]
[ECO "B90"]
[BlackElo "1468"]
[PlyCount "54"]
[EventDate "2021.09.30"]
[EventType "swiss"]
[EventRounds "6"]
[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. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. Bf4 e5 7. Bxe5 dxe5 8. Nf3 Qxd1+ 9. Rxd1 Nc6 10. Bc4 Bb4 11. a3 Bxc3+ 12. bxc3 0-0 13. h3 Nxe4 14. g4 Nxc3 15. Rc1 b5 16. Bd3 e4 17. Nd2 exd3 18. cxd3 Na4 19. Rxc6 Bb7 20. Ne4 Bxc6 21. g5 Nc3 22. f3 Rfe8 23. Kd2 Nxe4+ 24. dxe4 Rad8+ 25. Ke3 f5 26. Rg1 fxe4 27. fxe4 Rxe4+ 0-1

