[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.08"]
[Round "6"]
[White "Efron, Lucas"]
[Black "Marino, Fernando"]
[Result "1-0"]
[ECO "C56"]
[PlyCount "43"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Bd6 4. dxe5 Nxe5 5. Nxe5 Bxe5 6. Bc4 Nf6 7. Nc3 0-0 8. 0-0 Nh5 9. Qxh5 g6 10. Qxe5 d6 11. Qd4 c5 12. Qd5 Be6 13. Qxb7 Bxc4 14. Re1 d5 15. exd5 Rb8 16. Qxa7 Re8 17. Rxe8+ Qxe8 18. Bf4 Rd8 19. Qxc5 Ba6 20. Bg5 Rd7 21. Bh6 Re7 22. h3 1-0

[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.08"]
[Round "5"]
[White "Lugo, Sergio"]
[Black "Efron, Lucas"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "24"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. 0-0 0-0 6. Nc3 d6 7. h3 Nd4 8. Ne2 Nxf3+ 9. gxf3 Bxh3 10. Re1 Nh5 11. c3 Qf6 12. f4 Qg6+ 0-1

[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.08"]
[Round "7"]
[White "Zampedri, Juan"]
[Black "Efron, Lucas"]
[Result "1/2-1/2"]
[ECO "C48"]
[PlyCount "68"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Nc3 Bc5 5. 0-0 0-0 6. d3 d6 7. Bg5 h6 8. Bh4 Be6 9. Bc4 Bxc4 10. dxc4 Ne7 11. Bxf6 gxf6 12. Nh4 Kh8 13. Na4 Ng6 14. Nxg6+ fxg6 15. Qg4 Rg8 16. Nxc5 dxc5 17. Rad1 Qe8 18. Qd7 Qxd7 19. Rxd7 Rac8 20. f4 exf4 21. Rxf4 Rgf8 22. Re7 g5 23. Rf5 b6 24. Re6 Rcd8 25. Rexf6 Rd1+ 26. Kf2 Rxf6 27. Rxf6 Rd2+ 28. Kf3 Rxc2 29. Rxh6+ Kg7 30. Rh5 Kg6 31. g4 Rxb2 32. e5 Rxa2 33. e6 Ra3+ 34. Ke4 Ra2 1/2-1/2

[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.07"]
[Round "4"]
[White "Efron, Lucas"]
[Black "Mendez Casanave, Federico"]
[Result "0-1"]
[ECO "C00"]
[PlyCount "48"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. Nc3 Nf6 5. d3 Bg4 6. h3 Bh5 7. g4 Bg6 8. h4 Nxg4 9. Nd4 Nf6 10. Qf3 Bc5 11. Nb3 Bb4 12. a3 Bxc3+ 13. bxc3 0-0 14. c4 Re8+ 15. Be3 d4 16. Nxd4 Qxd4 17. Qxb7 Qxa1+ 18. Kd2 Nbd7 19. Bg2 Qxa3 20. Bd4 Rab8 21. Qxc7 Qb4+ 22. Bc3 Qb6 23. Qg3 Nh5 24. Qf3 Ne5 0-1

[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.07"]
[Round "2"]
[White "Efron, Lucas"]
[Black "Vidal, Benjamin"]
[Result "1-0"]
[ECO "C44"]
[PlyCount "43"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 5. Ng5 Ne5 6. Bxf7+ Nxf7 7. Nxf7 Kxf7 8. Qh5+ g6 9. Qxc5 Nf6 10. Qd5+ Ke8 11. Qe5+ Qe7 12. Qxd4 Qxe4+ 13. Qxe4+ Nxe4 14. 0-0 d5 15. Re1 Be6 16. f3 Nc5 17. Nc3 Ke7 18. Be3 Na6 19. Rf1 c6 20. Bd4 Rhe8 21. Rfe1 Nb4 22. Rac1 1-0

[Event "Buenos Aires Najdorf U08/10"]
[Site "Buenos Aires"]
[Date "2004.10.07"]
[Round "1"]
[White "Rodriguez Balbin, Cristian"]
[Black "Efron, Lucas"]
[Result "1/2-1/2"]
[ECO "A46"]
[PlyCount "28"]
[EventDate "2004.10.07"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "ARG"]
[SourceTitle "EXT 2005"]
[Source "ChessBase"]
[SourceDate "2004.11.15"]
[SourceVersion "1"]
[SourceVersionDate "2004.11.15"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 Nc6 3. Nc3 e6 4. e3 Bb4 5. Bd2 Bxc3 6. Bxc3 0-0 7. Be2 Ne4 8. Bd3 Nxc3 9. bxc3 d6 10. Qd2 e5 11. dxe5 dxe5 12. Be4 Qxd2+ 13. Nxd2 Be6 14. Bxc6 bxc6 1/2-1/2

