[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.04"]
[Round "7"]
[White "Puche, Edgardo"]
[Black "Osuna, Jair"]
[Result "0-1"]
[ECO "B10"]
[PlyCount "94"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. g3 Be7 4. d3 d6 5. Bg2 0-0 6. Nf3 c6 7. 0-0 Nbd7 8. Be3 Qc7 9. h3 Re8 10. Nh4 Nf8 11. Qf3 Be6 12. Nf5 Ng6 13. h4 Qd7 14. Bh3 Kh8 15. h5 Nf8 16. Kh2 Bxf5 17. Bxf5 Ne6 18. Ne2 g6 19. Bxe6 Qxe6 20. hxg6 Ng4+ 21. Kg2 fxg6 22. Ng1 Rf8 23. Qe2 Rf7 24. f3 Nxe3+ 25. Qxe3 b6 26. Nh3 d5 27. Rh1 Raf8 28. Raf1 d4 29. Qh6 Qxa2 30. Ng5 Bxg5 31. Qxg5 Qxb2 32. Qxe5+ Rf6 33. g4 Qxc2+ 34. Rf2 Qc5 35. Qh2 R8f7 36. Qb8+ Qf8 37. Qe5 Qd6 38. Qg5 Qf4 39. Qh4 Qe3 40. Rh3 Qxd3 41. e5 Re6 42. Qd8+ Kg7 43. Qh4 h5 44. gxh5 Qf5 45. hxg6 Rxg6+ 46. Kh2 Qf4+ 47. Kh1 Qc1+ 0-1

[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.03"]
[Round "6"]
[White "Osuna, Jair"]
[Black "Acuna, Nelson David"]
[Result "1/2-1/2"]
[ECO "E38"]
[PlyCount "95"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 0-0 5. Qc2 c5 6. e3 b6 7. Be2 Bb7 8. 0-0 Bxc3 9. bxc3 Ne4 10. Bd3 f5 11. Nd2 Nxd2 12. Qxd2 d6 13. Re1 Nc6 14. Bb2 Qg5 15. f4 Qh4 16. Qf2 Qxf2+ 17. Kxf2 Na5 18. Rad1 Ba6 19. d5 Bxc4 20. Bxc4 Nxc4 21. Ba1 e5 22. g3 e4 23. h3 b5 24. g4 a5 25. Re2 fxg4 26. hxg4 Ra7 27. Kg3 Rfa8 28. f5 b4 29. Kf4 Re8 30. Rc1 Ne5 31. Kxe4 Nxg4+ 32. Kf4 Ne5 33. Rd1 c4 34. cxb4 axb4 35. Bxe5 Rxe5 36. Rd4 Rc7 37. Rc2 Rc5 38. Rcxc4 Rcxd5 39. Rxd5 Rxd5 40. Rxb4 Kf7 41. a4 Ra5 42. e4 g6 43. Rb7+ Kf6 44. Rxh7 gxf5 45. Rh6+ Ke7 46. exf5 Rxa4+ 47. Kg5 Ra1 48. Rh7+ 1/2-1/2

[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.03"]
[Round "5"]
[White "Osuna, Jair"]
[Black "Torres Rodriguez, Juan Camilo"]
[Result "0-1"]
[ECO "B43"]
[BlackElo "2227"]
[PlyCount "61"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 b5 7. Be3 Bb7 8. f3 Nf6 9. Qd2 Bb4 10. a3 Be7 11. Rd1 0-0 12. Kf2 d6 13. Ndxb5 axb5 14. Nxb5 Qc6 15. Nxd6 Rd8 16. e5 Ng4+ 17. Kg3 Nxe5 18. Nf5 Bh4+ 19. Kxh4 Ng6+ 20. Kh3 Rxd2 21. Ne7+ Nxe7 22. Rxd2 Nd7 23. Rhd1 Nd5 24. Bg5 h6 25. Bh4 Nf4+ 26. Kg4 e5 27. Rd6 Qxc2 28. R1d2 Nf6+ 29. Bxf6 Qg6+ 30. Kh4 Nxg2+ 31. Kh3 0-1

[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.02"]
[Round "3"]
[White "Puche, David"]
[Black "Osuna, Jair"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "36"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. e4 d6 2. Nf3 e5 3. Nc3 Nf6 4. Bc4 Be7 5. d3 Nbd7 6. Ng5 0-0 7. Qf3 c6 8. Qg3 a5 9. Nh3 b5 10. Bh6 Nh5 11. Qf3 gxh6 12. Qxh5 bxc4 13. Qxh6 cxd3 14. cxd3 Kh8 15. Ne2 Rg8 16. Ng3 Qf8 17. Qh5 Nc5 18. Rd1 Bg4 0-1

[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.02"]
[Round "4"]
[White "Ruiz Castillo, Joshua Daniel"]
[Black "Osuna, Jair"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "2137"]
[PlyCount "107"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Be7 6. Be2 0-0 7. 0-0 Nbd7 8. f4 Re8 9. Bf3 c6 10. Be3 Bf8 11. Bf2 Nc5 12. Re1 Qc7 13. Qd2 Bg4 14. Bxg4 Nxg4 15. b4 Nxf2 16. Qxf2 Nd7 17. b5 a6 18. bxc6 bxc6 19. Kh1 Nf6 20. Rad1 Rad8 21. Qg3 d5 22. e5 Nh5 23. Qf2 Bb4 24. Nde2 Qa5 25. Rf1 Bxc3 26. Qf3 Nxf4 27. Nxc3 Ng6 28. Qxf7+ Kh8 29. Ne2 Nxe5 30. Qf5 Nc4 31. Rd3 Nd6 32. Qg4 Ne4 33. c3 Qc5 34. Rd4 Rf8 35. Nf4 Qxc3 36. Qd1 Qe3 37. Qf3 Qxf3 38. Rxf3 g5 39. Ne6 Rxf3 40. gxf3 Rd6 41. fxe4 Rxe6 42. exd5 cxd5 43. Rxd5 Re1+ 44. Kg2 Re2+ 45. Kg3 Rxa2 46. Rxg5 a5 47. h4 a4 48. Ra5 a3 49. Kg4 Ra1 50. Ra7 a2 51. Kh5 Kg8 52. Kh6 Rh1 53. Rxa2 Rxh4+ 54. Kg5 1/2-1/2

[Event "COL-ch U20"]
[Site "Barranquilla"]
[Date "2011.03.01"]
[Round "2"]
[White "Moreno Negrete, Emmanuel"]
[Black "Osuna, Jair"]
[Result "0-1"]
[ECO "B15"]
[PlyCount "58"]
[EventDate "2011.03.01"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 141 Extra"]
[Source "ChessBase"]
[SourceDate "2011.05.03"]
[SourceVersion "1"]
[SourceVersionDate "2011.05.03"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nc3 Nf6 4. f3 g6 5. Nge2 Nh5 6. e5 Bf5 7. g4 Bd7 8. gxh5 gxh5 9. Be3 Bf5 10. Ng3 Bg6 11. Bd3 Bxd3 12. Qxd3 h4 13. Nf5 e6 14. Nh6 h3 15. Rg1 Qh4+ 16. Rg3 Bxh6 17. Bxh6 Qxh6 18. Ne2 f6 19. f4 Nd7 20. Rxh3 Qg7 21. 0-0-0 0-0-0 22. Rg1 Qf7 23. Qa3 a6 24. Qb4 Rdg8 25. Rh1 Rg2 26. Rb3 Nf8 27. Qe1 Qh5 28. Ng3 Qg6 29. Qf1 Rxc2+ 0-1

