[Event "COL-ch U26"]
[Site "Medellin"]
[Date "2018.10.20"]
[Round "5"]
[White "Valencia, Jefferson"]
[Black "Nino Lopez, Michael Fabian"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2035"]
[BlackElo "1777"]
[PlyCount "43"]
[EventDate "2018.10.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nf6 6. d4 d5 7. Be2 Be7 8. 0-0 0-0 9. Bg5 h6 10. Bh4 Bf5 11. Re1 c6 12. Bd3 Bg4 13. h3 Be6 14. Ne5 c5 15. dxc5 Bxc5 16. Qf3 g5 17. Bg3 Nc6 18. Ne2 Nxe5 19. Bxe5 Nd7 20. Bc3 f5 21. Qh5 Kh7 22. Nf4 1-0

[Event "COL-ch U26"]
[Site "Medellin"]
[Date "2018.10.19"]
[Round "3"]
[White "Valencia, Jefferson"]
[Black "Acuna, Nelson David"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "2035"]
[BlackElo "1823"]
[PlyCount "20"]
[EventDate "2018.10.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. e3 exd4 4. exd4 Nf6 5. Nf3 Be7 6. Be2 0-0 7. 0-0 Bg4 8. Nc3 dxc4 9. Qa4 Nc6 10. Qxc4 h6 1/2-1/2

[Event "COL-ch U26"]
[Site "Medellin"]
[Date "2018.10.18"]
[Round "1"]
[White "Valencia, Jefferson"]
[Black "Salazar Zapata, Elian"]
[Result "1/2-1/2"]
[ECO "D65"]
[WhiteElo "2035"]
[BlackElo "1609"]
[PlyCount "36"]
[EventDate "2018.10.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Be7 5. e3 Nbd7 6. Nc3 0-0 7. Rc1 a6 8. cxd5 exd5 9. Bd3 Re8 10. 0-0 Nf8 11. Qc2 c6 12. Rfd1 Nh5 13. Bxe7 Qxe7 14. h3 g6 15. Na4 Be6 16. Ne5 Rab8 17. Nc5 f6 18. Nf3 Ng7 1/2-1/2

[Event "COL-ch U26"]
[Site "Medellin"]
[Date "2018.10.18"]
[Round "2"]
[White "Zuleta, Juan Carlos"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1918"]
[BlackElo "2035"]
[PlyCount "46"]
[EventDate "2018.10.18"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bf4 Bf5 4. f3 e6 5. g4 Bg6 6. h4 h5 7. g5 Nfd7 8. Nb5 Na6 9. a3 Nb6 10. e3 c6 11. Nc3 Bd6 12. Nh3 Qc7 13. Bd3 Bxd3 14. Qxd3 e5 15. dxe5 Bxe5 16. 0-0-0 g6 17. Bxe5 Qxe5 18. f4 Qg7 19. f5 0-0-0 20. Nf4 Rhg8 21. fxg6 fxg6 22. Ne6 Qe5 23. Nxd8 Rxd8 1-0

[Event "Quindio-ch"]
[Site "Quindio"]
[Date "2016.09.16"]
[Round "2.2"]
[White "Gutierrez Hernandez, Jorge Alejandro"]
[Black "Valencia, Jefferson"]
[Result "1/2-1/2"]
[ECO "E85"]
[WhiteElo "1817"]
[BlackElo "2035"]
[PlyCount "90"]
[EventDate "2016.09.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nbd7 7. Qd2 e5 8. Nge2 exd4 9. Nxd4 Re8 10. Be2 Nc5 11. b4 Ne6 12. 0-0 Nxd4 13. Bxd4 Be6 14. Rac1 Qe7 15. Rfd1 a5 16. b5 b6 17. Nd5 Qd8 18. Qb2 Bxd5 19. cxd5 Nh5 20. g3 Bxd4+ 21. Qxd4 Nf6 22. Rc3 Nd7 23. f4 f5 24. Bf3 fxe4 25. Bxe4 Nc5 26. Re3 Qd7 27. a4 Re7 28. Rde1 Rae8 29. Kg2 Kf7 30. h3 Qd8 31. Kf3 Rxe4 32. Rxe4 Rxe4 33. Rxe4 Nxe4 34. Qxe4 Qf6 35. g4 Qc3+ 36. Kg2 Qb2+ 37. Kg3 Qc3+ 38. Kh4 Qf6+ 39. g5 Qc3 40. Kg4 Qc1 41. Qe6+ Kf8 42. Qe4 Qg1+ 43. Kh4 Qf2+ 44. Kg4 Qg1+ 45. Kh4 Qf2+ 1/2-1/2

[Event "Quindio-ch"]
[Site "Quindio"]
[Date "2016.09.16"]
[Round "1.4"]
[White "Valencia, Jefferson"]
[Black "Alzate, Gustavo"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2035"]
[BlackElo "1715"]
[PlyCount "53"]
[EventDate "2016.09.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. c3 d5 4. exd5 Qxd5 5. Be2 Nf6 6. d4 cxd4 7. cxd4 e6 8. 0-0 Be7 9. Nc3 Qd8 10. Re1 0-0 11. Bf4 a6 12. Qd2 Nd5 13. Bg3 b5 14. Bd3 b4 15. Nxd5 Qxd5 16. Be4 Qb5 17. Qc2 Bb7 18. Bxh7+ Kh8 19. Be4 Rac8 20. Bd3 Qd5 21. Be4 Qh5 22. Qd3 f5 23. Bxc6 Bxc6 24. Rxe6 Bb5 25. Qe3 Bf6 26. Be5 Bd8 27. Rh6+ 1-0

[Event "Quindio-ch"]
[Site "Quindio"]
[Date "2016.09.16"]
[Round "5.5"]
[White "Valencia, Jefferson"]
[Black "Ballesteros Lopez, William"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2035"]
[BlackElo "2053"]
[PlyCount "60"]
[EventDate "2016.09.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nf3 Bg4 4. Be2 Nxd5 5. 0-0 Nf4 6. Nc3 Nxe2+ 7. Qxe2 Nc6 8. Qe4 f5 9. Qa4 Bxf3 10. gxf3 Qd4 11. Qb5 0-0-0 12. Qxf5+ Kb8 13. d3 e6 14. Qxe6 Bd6 15. Qh3 Rhf8 16. Be3 Qf6 17. Ne4 Qxb2 18. c3 Ne5 19. f4 Nxd3 20. Rab1 Qc2 21. Nxd6 Rxd6 22. Qf3 b6 23. a4 Qxa4 24. Ra1 Qc6 25. Qxc6 Rxc6 26. Ra6 Nc5 27. Bxc5 Rxc5 28. Rfa1 Rxf4 29. Rxa7 Rxc3 30. Ra8+ Kb7 0-1

[Event "Quindio-ch"]
[Site "Quindio"]
[Date "2016.09.16"]
[Round "3.2"]
[White "Valencia, Jefferson"]
[Black "Restrepo, Jose Daniel"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2035"]
[BlackElo "1842"]
[PlyCount "70"]
[EventDate "2016.09.16"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. d4 c6 5. Be2 g6 6. 0-0 Bg7 7. c4 Qd6 8. Nc3 0-0 9. Re1 Bg4 10. Be3 Nbd7 11. Qd2 Rfe8 12. Rad1 Bxf3 13. Bxf3 e5 14. d5 cxd5 15. Nxd5 e4 16. Nxf6+ Qxf6 17. Bg4 Ne5 18. Bd4 Qh4 19. Be2 Rad8 20. Qe3 Bh6 21. Qc3 Bg7 22. Qe3 Bh6 23. Qb3 Ng4 24. h3 Rxd4 25. Bxg4 Rxd1 26. Qxd1 Qd8 27. Qb1 f5 28. Be2 Qf6 29. Bd1 Bg7 30. b4 Qc3 31. Be2 Rd8 32. Kf1 Rd2 33. Kg1 Kf7 34. Qb3 Rxa2 35. Qxa2 Qxe1+ 0-1

[Event "Villamaria op 2nd"]
[Site "Villamaria"]
[Date "2016.07.03"]
[Round "4"]
[White "Cardozo, Stid Jafhar"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "1852"]
[BlackElo "2005"]
[PlyCount "50"]
[EventDate "2016.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Nbd7 7. 0-0 e5 8. h3 h6 9. Be3 Re8 10. dxe5 Nxe5 11. Nxe5 Rxe5 12. Bd4 Re8 13. Qd3 Qe7 14. Bf3 Be6 15. Nd5 Bxd5 16. exd5 Nd7 17. Bxg7 Kxg7 18. Qc3+ Qe5 19. Qxe5+ Rxe5 20. Rfe1 Rae8 21. Kf1 Nc5 22. Rxe5 Rxe5 23. b4 Nd3 24. a3 Nf4 25. h4 g5 0-1

[Event "Villamaria op 2nd"]
[Site "Villamaria"]
[Date "2016.07.03"]
[Round "5"]
[White "Valencia, Jefferson"]
[Black "Atehortua, Jorge Hernando"]
[Result "1-0"]
[ECO "A09"]
[WhiteElo "2005"]
[BlackElo "1889"]
[PlyCount "65"]
[EventDate "2016.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 d5 3. cxd5 Qxd5 4. Nc3 Qd8 5. g3 Bf5 6. Bg2 c6 7. 0-0 Nbd7 8. d4 e6 9. Re1 Bb4 10. Qb3 Qe7 11. a3 Bxc3 12. bxc3 Nb6 13. a4 Be4 14. Nd2 Bxg2 15. Kxg2 Qc7 16. Ba3 Nbd5 17. e4 Ne7 18. Rab1 0-0-0 19. e5 Ne8 20. Ne4 Nd5 21. Bd6 Nxd6 22. Nxd6+ Rxd6 23. exd6 Qb6 24. Qa2 Qa6 25. Qb3 Rd8 26. c4 Nb6 27. c5 Nd5 28. Rb2 Rd7 29. Qc2 g6 30. Reb1 h5 31. a5 h4 32. Ra2 g5 33. Rb6 1-0

[Event "Villamaria op 2nd"]
[Site "Villamaria"]
[Date "2016.07.03"]
[Round "3"]
[White "Valencia, Jefferson"]
[Black "Gomez, Manuela"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2005"]
[BlackElo "1636"]
[PlyCount "25"]
[EventDate "2016.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. 0-0 Bc5 5. d3 h6 6. c3 d6 7. h3 0-0 8. Re1 Na5 9. Nbd2 Nxc4 10. Nxc4 Be6 11. Be3 Bxe3 12. Nxe3 Nh5 13. Nxe5 1-0

[Event "Villamaria op 2nd"]
[Site "Villamaria"]
[Date "2016.07.02"]
[Round "2"]
[White "Chisco, Juan Esteban"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "B27"]
[WhiteElo "1419"]
[BlackElo "2005"]
[PlyCount "16"]
[EventDate "2016.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d3 Bg7 4. g3 Nc6 5. c3 Nf6 6. Bg2 d5 7. e5 Ng4 8. 0-0 Ngxe5 0-1

[Event "Villamaria op 2nd"]
[Site "Villamaria"]
[Date "2016.07.02"]
[Round "1"]
[White "Valencia, Jefferson"]
[Black "Torrente, Alejandro Josue"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "2005"]
[BlackElo "1817"]
[PlyCount "75"]
[EventDate "2016.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 c6 4. Bg2 Bf5 5. 0-0 e6 6. c4 Nbd7 7. Nc3 dxc4 8. Bf4 Bb4 9. Qa4 a5 10. Nh4 0-0 11. Nxf5 exf5 12. Qc2 g6 13. Rad1 Nb6 14. Bg5 Be7 15. d5 Nfxd5 16. Bxe7 Qxe7 17. Nxd5 cxd5 18. Bxd5 Rac8 19. Bf3 Rc7 20. Qc3 Qb4 21. Qe5 Re7 22. Qf6 Re6 23. Qd4 Na4 24. a3 Qxb2 25. Qxc4 Nc3 26. Rd7 b5 27. Qc5 Nxe2+ 28. Kg2 Nc3 29. Ra7 a4 30. h4 Ne4 31. Bxe4 fxe4 32. Re1 Re5 33. Qe3 Rd8 34. Re2 Qd4 35. Qf4 Rf5 36. Qc7 Re8 37. Re3 Qd2 38. Kh3 0-1

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.21"]
[Round "6"]
[White "Gasca, Andres Fernando"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "D93"]
[WhiteElo "1669"]
[BlackElo "2005"]
[PlyCount "106"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bf4 c6 6. e3 0-0 7. Bd3 Bg4 8. h3 Bxf3 9. Qxf3 e6 10. 0-0 Nbd7 11. Bd6 Re8 12. g4 dxc4 13. Be2 Nb6 14. Qg3 Nbd5 15. Bf3 Nxc3 16. bxc3 Qa5 17. Bb4 Qd8 18. e4 e5 19. Rad1 Nd7 20. Rd2 Qb6 21. d5 c5 22. Ba3 Qa5 23. Bb2 Qxa2 24. Ra1 Qb3 25. Bd1 Qb6 26. Be2 Qb5 27. Bc1 Nb6 28. g5 Qd7 29. Bg4 Qd8 30. Ba3 Qxg5 31. Rb2 Bf8 32. h4 Qf4 33. Qxf4 exf4 34. f3 Bd6 35. Rb5 Re5 36. Bxc5 Bxc5+ 37. Rxc5 f5 38. Bh3 fxe4 39. fxe4 Rxe4 40. Be6+ Kh8 41. Rc7 Re5 42. Ra5 Rb8 43. Rac5 f3 44. Rf7 Rd8 45. Rcc7 Rh5 46. Bg4 Rxh4 47. Bxf3 Na4 48. d6 Nxc3 49. Bxb7 Kg8 50. Rg7+ Kh8 51. Rge7 a5 52. d7 Rd4 53. Re8+ Rxe8 1-0

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.21"]
[Round "5"]
[White "Valencia, Jefferson"]
[Black "Valencia, Andres Felipe"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2005"]
[BlackElo "1915"]
[PlyCount "34"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 4. 0-0 Nf6 5. Re1 g6 6. d4 Nxd4 7. Bxf7+ Kxf7 8. Nxe5+ Kg7 9. Qxd4 d6 10. Nc3 Be6 11. Nf3 Kh7 12. e5 Ng4 13. exd6 Bxd6 14. Rxe6 Nxh2 15. Qd3 Nxf3+ 16. Qxf3 Qd7 17. Qh3 Rhf8 1-0

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.20"]
[Round "3"]
[White "Prieto Gomez, Camilo Orlando"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "1725"]
[BlackElo "2005"]
[PlyCount "63"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. f4 e6 7. Nf3 Nd7 8. Bc4 Bd6 9. 0-0 Ngf6 10. Qe2 Kf8 11. Ne5 Nd5 12. f5 Nxe5 13. dxe5 Bc5+ 14. Kh1 exf5 15. Nxf5 Qd7 16. Nh4 Re8 17. Bg5 Kg8 18. Rae1 h6 19. Nxg6 fxg6 20. Bh4 Kh7 21. e6 Qc8 22. Qe5 Be7 23. Rf7 Rhg8 24. Bxe7 Nxe7 25. Bd3 Qd8 26. h4 Qd5 27. Qxd5 cxd5 28. h5 Rgf8 29. hxg6+ Nxg6 30. Rxb7 h5 31. e7 Rf7 32. Re5 1-0

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.20"]
[Round "4"]
[White "Valencia, Jefferson"]
[Black "Berdugo Guihur, Jimkey"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2005"]
[BlackElo "1867"]
[PlyCount "40"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. Nc3 Qd8 5. Be2 Bf5 6. 0-0 e6 7. d4 c6 8. Be3 Nbd7 9. h3 Bd6 10. Bd3 Bg6 11. Re1 Qc7 12. Rb1 0-0 13. Bxg6 hxg6 14. b4 Nd5 15. Nxd5 cxd5 16. Qe2 Rfc8 17. Rec1 Qc4 18. Qxc4 Rxc4 19. c3 Rac8 20. Bd2 Nf6 1/2-1/2

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.19"]
[Round "1"]
[White "Torrente, Alejandro Josue"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "B05"]
[WhiteElo "1627"]
[BlackElo "2005"]
[PlyCount "65"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 exd6 6. Nc3 Be7 7. Be3 0-0 8. Be2 Nc6 9. Nf3 Bg4 10. b3 Re8 11. 0-0 Bf6 12. Rc1 Qe7 13. Qd2 Rad8 14. h3 Bc8 15. Nd5 Nxd5 16. cxd5 Nb8 17. Qa5 Na6 18. Bxa6 bxa6 19. Rxc7 Qe4 20. Kh2 Qg6 21. Rfc1 Bf5 22. g4 Bxg4 23. hxg4 Qxg4 24. Ng1 Re4 25. Qxa6 Qg6 26. Rc8 Rh4+ 27. Nh3 Qf5 28. Rxd8+ Bxd8 29. Qf1 g5 30. f3 Rh6 31. Qg2 Qxd5 32. Rc8 Qa5 33. Qxg5+ 1-0

[Event "COL-ch U26"]
[Site "Cali"]
[Date "2014.10.19"]
[Round "2"]
[White "Valencia, Jefferson"]
[Black "Palomares Valencia, Daniel Felipe"]
[Result "0-1"]
[ECO "A35"]
[WhiteElo "2005"]
[BlackElo "1772"]
[PlyCount "82"]
[EventDate "2014.10.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2015"]
[Source "ChessBase"]
[SourceDate "2014.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2014.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 c5 6. Be2 Nc6 7. 0-0 cxd4 8. Nxd4 0-0 9. cxd5 Nxd5 10. Nxd5 Qxd5 11. Bf3 Qc5 12. Nxc6 bxc6 13. Qa4 Rb8 14. Rb1 Be6 15. b3 Qb5 16. Bxc6 Qxa4 17. Bxa4 Bf5 18. Ba3 Bxb1 19. Rxb1 Bf6 20. Bc5 a6 21. Kf1 Rfc8 22. Rc1 Be5 23. Rc4 Bd6 24. Bxd6 exd6 25. Rd4 Rc2 26. Rxd6 Rxa2 27. g3 Rc8 28. Rxa6 Kg7 29. Bb5 Rb2 30. Bc4 f5 31. Ra7+ Kh6 32. h4 Rd8 33. Kg1 Rd1+ 34. Kg2 Rdd2 35. Bg8 Rxf2+ 36. Kg1 Kh5 37. Ra1 Kg4 38. Bd5 Kxg3 39. h5 g5 40. h6 f4 41. exf4 gxf4 0-1

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.22"]
[Round "6.6"]
[White "Valencia, Jefferson"]
[Black "Torres, Richard"]
[Result "0-1"]
[ECO "C02"]
[PlyCount "54"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. f4 Qb6 6. Nf3 Nge7 7. Be2 Nf5 8. g4 Nh6 9. h3 Be7 10. Na3 cxd4 11. cxd4 Bb4+ 12. Kf2 Bxa3 13. bxa3 Bd7 14. Be3 Na5 15. Rb1 Qc7 16. Rb4 Nc4 17. Bxc4 dxc4 18. Nd2 b5 19. Ne4 0-0 20. Nd6 Rab8 21. Qc1 Kh8 22. f5 Ng8 23. Ke2 f6 24. fxe6 Bxe6 25. Bf4 Qc6 26. exf6 Nxf6 27. Be5 Qg2+ 0-1

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.21"]
[Round "5.4"]
[White "Rosero, Jefferson"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "B80"]
[PlyCount "61"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. f3 Qc7 7. Be3 e6 8. Qd2 b5 9. g4 Be7 10. 0-0-0 Nc6 11. Qf2 Rb8 12. g5 Nd7 13. Kb1 Nce5 14. h4 Nb6 15. Rg1 Nbc4 16. Bc1 b4 17. Nce2 Qb6 18. Ka1 a5 19. f4 Nc6 20. Ng3 Ba6 21. Bxc4 Bxc4 22. Be3 Qb7 23. Nxc6 Qxc6 24. Bd4 f6 25. Nh5 Qxe4 26. Nxg7+ Kf7 27. gxf6 Bxf6 28. Bxf6 Kxf6 29. Nh5+ Kf7 30. Rg7+ Kf8 31. Qa7 1-0

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.21"]
[Round "4.2"]
[White "Valencia, Jefferson"]
[Black "Munoz Romero, Cristian Camilo"]
[Result "0-1"]
[ECO "D12"]
[BlackElo "1948"]
[PlyCount "104"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. e3 Bf5 4. Nc3 e6 5. Nf3 Nf6 6. Be2 Nbd7 7. 0-0 Bd6 8. b3 0-0 9. Bb2 Re8 10. Qd2 Ne4 11. Nxe4 dxe4 12. Ne5 Nxe5 13. dxe5 Be7 14. Qc3 Qb6 15. g4 Bg6 16. a3 a5 17. Kg2 Red8 18. Rh1 Bh4 19. c5 Qc7 20. Qc4 Rd5 21. Bd4 f6 22. exf6 Bxf6 23. Bxf6 gxf6 24. Qc3 Qe7 25. b4 Rad8 26. Rad1 axb4 27. axb4 Rxd1 28. Rxd1 Rxd1 29. Bxd1 Qd7 30. Be2 Kf7 31. h4 Ke7 32. h5 Bf7 33. g5 e5 34. gxf6+ Kxf6 35. Kg3 Bxh5 36. Bxh5 Qg7+ 37. Kh3 Qh6 38. Qd2 Qxh5+ 39. Kg2 Qg4+ 40. Kh2 Qh5+ 41. Kg2 Qf7 42. Qd6+ Kf5 43. Qd8 h5 44. Kh3 Kg6 45. Kg2 Qg7 46. Kh3 Qf6 47. Qg8+ Kh6 48. Qg2 Qf3+ 49. Qxf3 exf3 50. Kg3 Kg5 51. Kxf3 h4 52. Kg2 e4 0-1

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.20"]
[Round "3.3"]
[White "Diaz, Cristian Camilo"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "C07"]
[WhiteElo "1959"]
[PlyCount "60"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. Ngf3 Nf6 6. Nb3 Nc6 7. dxc5 Qxd1+ 8. Kxd1 Be7 9. Bd2 0-0 10. Bd3 Rd8 11. Ke2 e5 12. Ng5 h6 13. Ne4 Nd5 14. a3 f5 15. Nc3 e4 16. Nxd5 exd3+ 17. cxd3 Rxd5 18. Be3 Bf6 19. Rab1 Bd7 20. Kd2 Rd8 21. Kc2 Ne5 22. d4 Nc6 23. Rbd1 f4 24. Bxf4 Bf5+ 25. Kc3 Nxd4 26. Bd6 R5xd6 27. cxd6 Rc8+ 28. Kb4 Nc2+ 29. Ka4 Bd7+ 30. Ka5 Bd8# 0-1

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.20"]
[Round "2.6"]
[White "Valencia, Jefferson"]
[Black "Parra Meza, Brayan"]
[Result "1-0"]
[ECO "E76"]
[BlackElo "1794"]
[PlyCount "33"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 Nbd7 7. Be2 Re8 8. e5 Ng4 9. h3 Nh6 10. g4 c5 11. Be3 cxd4 12. Qxd4 dxe5 13. fxe5 Qa5 14. Qd2 Nxe5 15. Bxh6 Rd8 16. Nd5 Qc5 17. Nf6+ 1-0

[Event "South Region-ch U18"]
[Site "Cali"]
[Date "2012.04.19"]
[Round "1.1"]
[White "Hernandez, Cristian Andres"]
[Black "Valencia, Jefferson"]
[Result "1/2-1/2"]
[ECO "D90"]
[WhiteElo "2116"]
[PlyCount "9"]
[EventDate "2012.04.19"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 g6 5. Bf4 1/2-1/2

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "4.3"]
[White "Hernandez, Stefano"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1800"]
[BlackElo "1759"]
[PlyCount "78"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Nf3 Bf5 6. Be3 Nbd7 7. Bd3 Bg6 8. a3 c6 9. Qe2 Be7 10. h3 a5 11. 0-0 Qc7 12. Rfe1 0-0 13. Bxg6 hxg6 14. Qd2 Bd6 15. Bg5 Rfe8 16. Bxf6 gxf6 17. Rxe8+ Rxe8 18. Re1 Rxe1+ 19. Qxe1 Qb6 20. Nd1 Kg7 21. Qc3 Nf8 22. Qd2 Ne6 23. c3 Qb5 24. Ne1 Nf4 25. Ne3 a4 26. Ng4 Qc4 27. h4 Qe2 28. Qxe2 Nxe2+ 29. Kf1 Nc1 30. Ne3 f5 31. N3c2 f4 32. Nb4 Kh6 33. Nbd3 Nxd3 34. Nxd3 Kh5 35. Ke2 Kxh4 36. Kf3 g5 37. Ne5 Bxe5 38. dxe5 b5 39. Ke2 c5 0-1

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "2.5"]
[White "Lozano Betancurt, Juan Sebastian"]
[Black "Valencia, Jefferson"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "1371"]
[BlackElo "1759"]
[PlyCount "94"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e3 Bg7 6. Bc4 c6 7. Qf3 e6 8. a3 Nxc3 9. bxc3 Qa5 10. Bb2 Nd7 11. h4 Nf6 12. e4 e5 13. h5 Bg4 14. Qg3 Bxh5 15. dxe5 Nxe4 16. Bxf7+ Kxf7 17. Qf4+ Ke7 18. Qxe4 Qxe5 19. Qxe5+ Bxe5 20. f3 Bg3+ 21. Kf1 Raf8 22. Rh3 Be5 23. Re1 Kd6 24. Rxe5 Kxe5 25. c4+ Kd6 26. Bxh8 Rxh8 27. g4 Bxg4 28. fxg4 Kc5 29. Rc3 Rf8+ 30. Nf3 Rf4 31. g5 Rxc4 32. Rxc4+ Kxc4 33. Ne5+ Kb3 34. Ke1 Kxa3 35. Kd1 Kb2 36. Nc4+ Ka2 37. Na5 b5 38. Nxc6 a6 39. Nb4+ Kb3 40. Nxa6 Kc4 41. Ke2 Kd5 42. Kf3 Ke5 43. Kg4 h6 44. gxh6 Kf6 45. Nb4 g5 46. Kh5 g4 47. Nd5+ Kf7 1/2-1/2

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "3.3"]
[White "Valencia, Jefferson"]
[Black "Cadavid, Juan Miguel"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1759"]
[BlackElo "1641"]
[PlyCount "55"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. e3 Nf6 4. Nf3 e6 5. Nbd2 Nbd7 6. b3 Bd6 7. Bb2 0-0 8. Bd3 Re8 9. Ne5 c5 10. f4 b6 11. cxd5 exd5 12. 0-0 Bb8 13. Rf3 Nf8 14. Rg3 Bb7 15. dxc5 bxc5 16. Bb5 Re6 17. Ndf3 Qb6 18. Bd7 Re7 19. Bf5 a5 20. Qc2 Ne6 21. Nc4 dxc4 22. Bxf6 cxb3 23. axb3 Rd7 24. Bxh7+ Kf8 25. Ne5 Bxe5 26. Bxe5 g6 27. Bxg6 fxg6 28. Qxg6 1-0

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "6.1"]
[White "Valencia, Jefferson"]
[Black "Hernandez, Cristian Andres"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "1759"]
[BlackElo "2116"]
[PlyCount "58"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 8. Bh4 Be7 9. Bf2 b5 10. a3 Bb7 11. Bd3 Nbd7 12. b4 Rc8 13. Nde2 Ng4 14. Qd2 Nxf2 15. Kxf2 Qb6+ 16. Qe3 Bf6 17. Na2 Bxa1 18. Rxa1 Qxe3+ 19. Kxe3 Nb6 20. Nac3 d5 21. e5 Nc4+ 22. Kd4 0-0 23. a4 Bc6 24. a5 f6 25. exf6 gxf6 26. Bg6 e5+ 27. Kd3 Nd6 28. Rg1 d4 29. Na2 Kg7 0-1

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "1.5"]
[White "Valencia, Jefferson"]
[Black "Mondragon, David Santiago"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1759"]
[BlackElo "1491"]
[PlyCount "81"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. e3 Nf6 4. Nf3 Be7 5. Nbd2 b6 6. b3 Bb7 7. Bb2 Nbd7 8. Bd3 Rc8 9. 0-0 0-0 10. Ne5 c5 11. f4 dxc4 12. bxc4 Nxe5 13. fxe5 Ne8 14. Qg4 Bg5 15. Qh3 h6 16. Ne4 Bxe4 17. Bxe4 cxd4 18. exd4 Rxc4 19. Qd3 b5 20. Rf3 f5 21. exf6 Rxf6 22. Raf1 Rxf3 23. Qxf3 Bf6 24. Kh1 Nd6 25. Bd3 Rc7 26. Qg4 Nf5 27. Qg6 a6 28. Be4 Qe7 29. g4 Nh4 30. Qh7+ Kf7 31. d5 e5 32. Bc1 Ke8 33. Qg8+ Kd7 34. Bd2 Rc4 35. Qh7 Bg5 36. Ba5 Rc1 37. Rxc1 Bxc1 38. Qg8 Qf6 39. Qe6+ Qxe6 40. dxe6+ Kxe6 41. Bb7 1-0

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "5.2"]
[White "Valencia, Jefferson"]
[Black "Sierra, Juan Daniel1111"]
[Result "1-0"]
[ECO "B32"]
[WhiteElo "1759"]
[BlackElo "1710"]
[PlyCount "45"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. c4 a6 7. N5a3 Nf6 8. Nc3 Be7 9. f3 Bd7 10. Be3 Be6 11. Nc2 Nd7 12. Be2 0-0 13. 0-0 b6 14. Qd2 f5 15. exf5 Rxf5 16. Rad1 Na5 17. b3 Nb7 18. Bd3 Rf8 19. Be4 Rb8 20. Nb4 Na5 21. Nxa6 Nc5 22. Nxb8 Qxb8 23. Bd5 1-0

[Event "Valle Region-ch U18"]
[Site "Ansermanuevo"]
[Date "2012.03.23"]
[Round "7.2"]
[White "Zuleta, Juan Carlos"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "A16"]
[WhiteElo "1862"]
[BlackElo "1759"]
[PlyCount "76"]
[EventDate "2012.03.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 c6 3. d3 d5 4. cxd5 cxd5 5. e3 g6 6. h3 Bg7 7. Nf3 Nc6 8. g3 0-0 9. Bg2 Bf5 10. g4 Be6 11. 0-0 h6 12. a3 Rc8 13. Rb1 a6 14. Ne2 Bd7 15. b4 b5 16. Ned4 Re8 17. Nxc6 Bxc6 18. Bb2 Qb6 19. Bd4 Qb8 20. Ne5 Bb7 21. f4 Red8 22. Rc1 Nd7 23. Nxd7 Rxd7 24. Bxg7 Kxg7 25. Qd2 Rdc7 26. Rxc7 Qxc7 27. e4 d4 28. f5 g5 29. Qf2 Qe5 30. Ra1 Rc3 31. Bf1 Bc6 32. Qh2 Qxh2+ 33. Kxh2 Kf6 34. Kg2 Ke5 35. Kf2 Kf4 36. Be2 Rc2 37. Rb1 Bxe4 38. Rf1 Bc6 0-1

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.12"]
[Round "7.1"]
[White "Mercado, Luisa Fernanda"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2056"]
[PlyCount "57"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 e6 5. 0-0 Be7 6. Re1 0-0 7. Bf1 Nbd7 8. d4 cxd4 9. cxd4 a6 10. a4 b6 11. Nc3 Bb7 12. h3 Re8 13. Bf4 h6 14. Qb3 Qb8 15. Bc4 Bf8 16. Bh2 Nh7 17. Rac1 Qd8 18. Re3 Ra7 19. Nd2 Nb8 20. Qd1 Nc6 21. d5 Nd4 22. Nb3 Nxb3 23. dxe6 fxe6 24. Qxb3 Bc8 25. Rd1 Ng5 26. e5 d5 27. Nxd5 exd5 28. Rxd5 Qe7 29. Rd7+ 1-0

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.11"]
[Round "6.1"]
[White "Valencia, Jefferson"]
[Black "Zuleta, Juan Esteban"]
[Result "1-0"]
[ECO "A13"]
[BlackElo "1858"]
[PlyCount "63"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. b3 e6 3. Nc3 Be7 4. Bb2 0-0 5. e3 d5 6. Nf3 Nc6 7. Be2 d4 8. exd4 Nxd4 9. Nxd4 Qxd4 10. Qc2 Qh4 11. h3 a6 12. Bf3 Nh5 13. Ne4 Nf6 14. g3 Qh6 15. Bd4 Rd8 16. Be3 Qg6 17. 0-0 Nd7 18. d4 e5 19. d5 Nc5 20. b4 Nxe4 21. Bxe4 Qh5 22. c5 Bxh3 23. Rfd1 Bg4 24. d6 Bxd1 25. Rxd1 cxd6 26. Bxb7 dxc5 27. Re1 Ra7 28. Be4 Rad7 29. Kg2 cxb4 30. Rh1 Qg4 31. Bxh7+ Kf8 32. Bf5 1-0

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.11"]
[Round "5.1"]
[White "Velez Alvarez, Laura Camila"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "C08"]
[WhiteElo "1651"]
[PlyCount "52"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 5. Ngf3 Nf6 6. Qe2+ Be7 7. dxc5 0-0 8. Nb3 Re8 9. Be3 Nc6 10. 0-0-0 Qc7 11. Qe1 Bf5 12. Bd3 Bxd3 13. cxd3 d4 14. Bxd4 Nxd4 15. Nfxd4 Nd5 16. Qd2 a5 17. a4 Bxc5 18. Nb5 Qb6 19. Nxc5 Qxc5+ 20. Kb1 Nb4 21. f3 Rad8 22. d4 Qc4 23. Qc3 Qa2+ 24. Kc1 Re2 25. Na3 Qa1+ 26. Nb1 Na2# 0-1

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.10"]
[Round "3.1"]
[White "Hernandez Sanchez, Jairo Andres"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2099"]
[PlyCount "15"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 d6 4. 0-0 g6 5. d4 cxd4 6. Qxd4 e5 7. Nxe5 Qf6 8. Nxc6 1-0

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.10"]
[Round "4.1"]
[White "Valencia, Jefferson"]
[Black "Jaramillo Ochoa, Mateo"]
[Result "0-1"]
[ECO "B50"]
[BlackElo "1934"]
[PlyCount "124"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bc4 d6 4. 0-0 Nf6 5. Nc3 Bg4 6. h3 Bxf3 7. Qxf3 Nd4 8. Qe3 a6 9. Bb3 e6 10. Ne2 Nxb3 11. axb3 Be7 12. d4 cxd4 13. Nxd4 0-0 14. Bd2 Rc8 15. Bc3 Qc7 16. Kh1 d5 17. f3 dxe4 18. fxe4 Nd7 19. Qe2 Ne5 20. Qh5 Bf6 21. Rxf6 gxf6 22. Qh6 Qe7 23. Rf1 Rfe8 24. Nf3 Rxc3 25. bxc3 Ng6 26. Nd4 Qc5 27. Qd2 Rc8 28. Rf3 Qg5 29. Qf2 Kg7 30. Ne2 Rd8 31. Nd4 b5 32. Qe1 Qh4 33. Rg3 Kf8 34. Qe3 Qf4 35. Qe1 Ne5 36. Re3 Ke7 37. g3 Qh6 38. Kg2 Rg8 39. Nf3 Ng6 40. Kh2 Rd8 41. Nd4 Ne5 42. Kg2 Rd6 43. Re2 Qh5 44. Qf2 Qg5 45. Qe1 h5 46. Qa1 h4 47. g4 Qf4 48. Qe1 Rd8 49. Qxh4 Rxd4 50. cxd4 Qf3+ 51. Kg1 Qxe2 52. dxe5 Qe3+ 53. Qf2 Qc1+ 54. Kg2 fxe5 55. h4 Qf4 56. Qxf4 exf4 57. e5 f6 58. exf6+ Kxf6 59. Kf3 e5 60. Ke4 a5 61. c4 a4 62. bxa4 b4 0-1

[Event "Armenia Nacional Escolar U17"]
[Site "Armenia"]
[Date "2011.03.09"]
[Round "2.1"]
[White "Valencia, Jefferson"]
[Black "Pardo, Javier Andres"]
[Result "1-0"]
[ECO "B60"]
[BlackElo "1971"]
[PlyCount "107"]
[EventDate "2011.03.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nc6 7. Nb3 b5 8. f3 h6 9. Be3 Ne5 10. Qd4 Rb8 11. Be2 Qc7 12. 0-0-0 Bd7 13. g4 b4 14. Nd5 Nxd5 15. exd5 Bb5 16. Bxb5+ Rxb5 17. Qe4 Qc4 18. Rd4 Qe2 19. Nd2 g6 20. Rg1 Bg7 21. Bf4 Qf2 22. Rf1 f5 23. gxf5 gxf5 24. Rxf2 fxe4 25. Rxe4 a5 26. Bxe5 Bxe5 27. Nc4 Rxd5 28. Nxe5 dxe5 29. Rfe2 Rf8 30. R2e3 Kd7 31. a3 bxa3 32. Rxa3 Rf4 33. Rae3 Kd6 34. c4 Rc5 35. Kd2 Rxc4 36. Rxe5 Rfd4+ 37. Ke1 Rc1+ 38. Kf2 Rc2+ 39. Kg3 Rd5 40. Re6+ Kc5 41. Rxh6 Rxb2 42. Rxe7 Rb8 43. Rc7+ Kd4 44. Rh4+ Kd3 45. Rc1 Re5 46. Ra1 Rb3 47. Rha4 Rg5+ 48. Kh4 Rf5 49. Kg4 Rbb5 50. f4 Ke3 51. R1a3+ Ke2 52. Re4+ Kd2 53. Kf3 Rh5 54. Re2+ 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.11.01"]
[Round "6"]
[White "Garcia Rivera, Brahian Stiven"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "B82"]
[PlyCount "46"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e6 7. Bd3 Qc7 8. Nf3 Nbd7 9. 0-0 Be7 10. f5 e5 11. Qe1 b5 12. Qd2 Bb7 13. Re1 b4 14. Nd1 Rb8 15. c3 b3 16. axb3 Nc5 17. Qc2 Ncxe4 18. Bxe4 Nxe4 19. b4 Nf6 20. Rf1 0-0 21. Nf2 Qb6 22. Kh1 Rfc8 23. Qd3 e4 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "4"]
[White "Tamayo, Juan Jose"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "C15"]
[PlyCount "53"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 Qxd5 4. Nc3 Bb4 5. a3 Bxc3+ 6. bxc3 Nf6 7. Nf3 c5 8. Bb2 0-0 9. Ne5 Nc6 10. Nxc6 Qxc6 11. c4 cxd4 12. Qxd4 e5 13. Qd3 Re8 14. 0-0-0 Bg4 15. f3 e4 16. Qc3 exf3 17. gxf3 Bxf3 18. Rg1 Kh8 19. Rd3 Be4 20. Rdg3 Bg6 21. Bd3 Qc7 22. Bxg6 fxg6 23. Rh3 Nh5 24. Rxh5 Re7 25. Rxg6 Qf4+ 26. Kb1 Qf7 27. Rgh6 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "3"]
[White "Valencia, Jefferson"]
[Black "Gil, Neftali"]
[Result "0-1"]
[ECO "C15"]
[PlyCount "84"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd3 dxe4 5. Bxe4 c5 6. a3 Ba5 7. Nge2 Nc6 8. dxc5 Qxd1+ 9. Kxd1 Nf6 10. Bf4 Nxe4 11. Nxe4 e5 12. Nd6+ Ke7 13. Be3 Bc7 14. Nb5 Bb8 15. Nec3 Be6 16. Ne4 h6 17. Kc1 f5 18. Ned6 a6 19. Nc3 b6 20. Rd1 f4 21. Bd2 bxc5 22. Nde4 Ba7 23. a4 Rhd8 24. a5 Rd4 25. f3 Rad8 26. Re1 Kf7 27. Ne2 R4d7 28. b3 c4 29. b4 Bf5 30. Bc3 Bxe4 31. fxe4 Ke6 32. Kb2 Be3 33. Ka3 Na7 34. Ka2 Nb5 35. Kb2 g5 36. Reb1 g4 37. Rf1 h5 38. Be1 Nd6 39. Bh4 Rb8 40. Kc3 Nxe4+ 41. Kxc4 Nd2+ 42. Kc3 Rc7+ 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "5"]
[White "Valencia, Jefferson"]
[Black "Velasquez, Andres Felipe"]
[Result "1-0"]
[ECO "D35"]
[PlyCount "47"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. Nc3 c6 4. Bf4 e6 5. e3 Bd6 6. Bd3 dxc4 7. Bxd6 Qxd6 8. Bxc4 b5 9. Bd3 Bb7 10. Nge2 0-0 11. Rc1 Nbd7 12. 0-0 Rfd8 13. Bb1 a6 14. Qe1 c5 15. f3 e5 16. Qg3 Nh5 17. Qh4 Qh6 18. f4 cxd4 19. exd4 exf4 20. Qe7 f3 21. gxf3 b4 22. Ne4 Qe3+ 23. Rf2 Nf4 24. Nf6+ 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.30"]
[Round "2"]
[White "Ramirez, Joulinne Andrea"]
[Black "Valencia, Jefferson"]
[Result "0-1"]
[ECO "D01"]
[PlyCount "48"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. Nf3 g6 5. e3 Bg7 6. Bd3 0-0 7. Qe2 c5 8. 0-0-0 c4 9. Bxf6 Nxf6 10. Bxg6 hxg6 11. h4 Bg4 12. e4 Qa5 13. Qe3 dxe4 14. Nxe4 Nxe4 15. Qxe4 Bf5 16. Qxb7 Qxa2 17. Kd2 Rab8 18. Qxe7 Rxb2 19. Ke1 Rxc2 20. Qe3 Bh6 21. Qe5 Bd3 22. Rd2 Rc1+ 23. Rd1 Rxd1+ 24. Kxd1 Qb1# 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.30"]
[Round "1"]
[White "Valencia, Jefferson"]
[Black "Ossa, Orlando Jose"]
[Result "0-1"]
[ECO "E62"]
[BlackElo "2257"]
[PlyCount "50"]
[EventDate "2010.10.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2011"]
[Source "ChessBase"]
[SourceDate "2010.11.26"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.26"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. g3 0-0 6. Bg2 Nc6 7. 0-0 e5 8. Bg5 h6 9. Bxf6 Bxf6 10. d5 Nb8 11. Nd2 a5 12. e4 Bg7 13. Qe2 f5 14. f4 Na6 15. Qe3 exf4 16. Rxf4 g5 17. Rf2 Nb4 18. Rc1 c5 19. dxc6 f4 20. gxf4 gxf4 21. Rxf4 Rxf4 22. cxb7 Bxb7 23. Qxf4 Nd3 24. Qf1 Qb6+ 25. Kh1 Nf2+ 0-1

[Event "COL-ch School U17"]
[Site "Yumbo"]
[Date "2010.04.30"]
[Round "7.1"]
[White "Valencia, Jefferson"]
[Black "Hernandez, Cristian Andres"]
[Result "0-1"]
[ECO "B98"]
[BlackElo "1932"]
[PlyCount "98"]
[EventDate "2010.04.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. a4 Qc7 9. Qf3 b6 10. g4 Bb7 11. Bd3 h6 12. Rf1 hxg5 13. fxg5 Nbd7 14. gxf6 Bxf6 15. Nde2 Ne5 16. Qf4 Rh4 17. h3 Rxh3 18. g5 Nxd3+ 19. cxd3 Bxc3+ 20. Nxc3 Rxd3 21. Rc1 Rc8 22. Rc2 d5 23. e5 Qe7 24. Rh2 Rc4 25. Rh8+ Kd7 26. Qxf7 Re3+ 27. Kd2 Rxe5 28. g6 Rf5 29. Rxf5 exf5 30. Rb8 Rc7 31. Nxd5 Bxd5 32. Qxd5+ Qd6 33. Qxd6+ Kxd6 34. Rxb6+ Rc6 35. Rb7 Ke6 36. a5 Ke5 37. Rb6 Rc5 38. b4 Rc4 39. Rb7 Kf6 40. Rb6+ Ke5 41. Kd3 Rg4 42. Rxa6 Rxb4 43. Rb6 Ra4 44. a6 f4 45. Ke2 Kf5 46. Kf2 Kg4 47. Rb7 Ra2+ 48. Kg1 Kg3 49. Rb1 Rxa6 0-1

[Event "COL-ch School U17"]
[Site "Yumbo"]
[Date "2010.04.29"]
[Round "6.1"]
[White "Narvaez, Zamir Alexis"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "C14"]
[WhiteElo "2168"]
[PlyCount "31"]
[EventDate "2010.04.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 a6 7. Qg4 Bxg5 8. hxg5 Qe7 9. g6 h6 10. gxf7+ Kf8 11. Nh3 h5 12. Ng5 Nf6 13. exf6 gxf6 14. Nh7+ Kxf7 15. Qxh5+ Kg7 16. Rh3 1-0

[Event "COL-ch School U17"]
[Site "Yumbo"]
[Date "2010.04.29"]
[Round "5.1"]
[White "Valencia, Jefferson"]
[Black "Cadena Montoya, Gustavo Adolfo"]
[Result "1-0"]
[ECO "D92"]
[BlackElo "2060"]
[PlyCount "91"]
[EventDate "2010.04.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. c4 Bg7 4. Nc3 d5 5. Bf4 0-0 6. Rc1 dxc4 7. e4 Bg4 8. Be2 Nc6 9. d5 Na5 10. 0-0 Bxf3 11. Bxf3 c6 12. d6 Re8 13. e5 Nd7 14. Re1 Nc5 15. Bg5 Nd3 16. Bxe7 Rxe7 17. dxe7 Qxe7 18. Rc2 Nxe1 19. Qxe1 Qxe5 20. Re2 Qd6 21. Ne4 Qc7 22. Ng5 h6 23. Re7 Qf4 24. Nxf7 c3 25. bxc3 Rf8 26. Ne5 Bxe5 27. Rxe5 b6 28. Re7 Rf7 29. Re8+ Kg7 30. h3 Qg5 31. Qe6 Qc1+ 32. Qe1 Qxe1+ 33. Rxe1 Kf6 34. Re4 Re7 35. Rd4 Ke6 36. Bg4+ Kf6 37. f4 h5 38. Rd6+ Kf7 39. Bf3 c5 40. c4 Kg7 41. Bd5 Re2 42. Rd7+ Kh6 43. g4 hxg4 44. hxg4 Rxa2 45. Bg8 g5 46. f5 1-0

[Event "COL-ch School U17"]
[Site "Yumbo"]
[Date "2010.04.27"]
[Round "1.1"]
[White "Hernandez, Cristian Andres"]
[Black "Valencia, Jefferson"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "1932"]
[PlyCount "15"]
[EventDate "2010.04.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 e6 2. c4 Nf6 3. Nc3 h6 4. e4 Bb4 5. Bd3 d6 6. Qa4+ Nc6 7. d5 Bxc3+ 8. bxc3 1-0

