[Event "Uniagraria AlphaZero op 2nd"]
[Site "Uniagraria"]
[Date "2019.11.11"]
[Round "7"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Tocua, Santiago"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1926"]
[BlackElo "1600"]
[PlyCount "106"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c3 Bg7 4. Bf4 0-0 5. e3 d6 6. h3 b6 7. a4 a5 8. Na3 Nbd7 9. Be2 Bb7 10. 0-0 e6 11. Nd2 Nd5 12. Bf3 Rb8 13. Bg3 f5 14. e4 fxe4 15. Nxe4 Nf4 16. Nb5 Nf6 17. Nxf6+ Qxf6 18. Bxf4 Bxf3 19. Qxf3 Qxf4 20. Qxf4 Rxf4 21. Nxc7 Kf7 22. Rfe1 Rf6 23. Re3 Rc8 24. Nb5 Ke7 25. Rae1 Kd7 26. b3 Rd8 27. c4 Rdf8 28. f4 Rxf4 29. Rxe6 Bxd4+ 30. Nxd4 Rxd4 31. Re7+ Kc6 32. Rxh7 Rd3 33. Ree7 Kc5 34. Rb7 Rxb3 35. Rhc7+ Kd4 36. Rc6 Rf6 37. c5 Kd5 38. Rcxb6 Rxb6 39. Rxb6 Kxc5 40. Rb5+ Kc4 41. Rxa5 d5 42. Ra8 d4 43. Rc8+ Kb4 44. Rb8+ Kc3 45. Rc8+ Kd2 46. h4 d3 47. g3 Kd1 48. g4 d2 49. h5 gxh5 50. gxh5 Rf4 51. h6 Ke2 52. Re8+ Kd3 53. Rd8+ Rd4 0-1

[Event "Uniagraria AlphaZero op 2nd"]
[Site "Uniagraria"]
[Date "2019.11.10"]
[Round "4"]
[White "Arenas Pinilla, Edwin"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1282"]
[BlackElo "1926"]
[PlyCount "28"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Bf4 e6 4. e3 Nf6 5. a3 Bd6 6. Bxd6 Qxd6 7. Nc3 Nbd7 8. Nf3 0-0 9. Bd3 dxc4 10. Bxc4 b5 11. Bd3 Bb7 12. 0-0 Rac8 13. Rc1 a6 14. Re1 Rfe8 1-0

[Event "Uniagraria AlphaZero op 2nd"]
[Site "Uniagraria"]
[Date "2019.11.10"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Rivera, Andres"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1926"]
[BlackElo "1600"]
[PlyCount "49"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. c4 e6 4. h3 d5 5. cxd5 exd5 6. Nc3 c6 7. Bg5 Bd6 8. e3 0-0 9. Bd3 Qe8 10. Bxf6 Rxf6 11. Qc2 a5 12. Ne5 Bxe5 13. dxe5 Qxe5 14. Nxd5 Rf8 15. Nb6 Ra7 16. Nxc8 Rxc8 17. Bxf5 Re8 18. Bxh7+ Kh8 19. Bg6 Rd8 20. 0-0 b5 21. Rfd1 Rc8 22. Rd4 Qf6 23. Rad1 c5 24. Qxc5 Rf8 25. Qh5+ 1-0

[Event "Uniagraria AlphaZero op 2nd"]
[Site "Uniagraria"]
[Date "2019.11.09"]
[Round "2"]
[White "Munoz Galvez, Jhon Edison"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D61"]
[WhiteElo "2332"]
[BlackElo "1926"]
[PlyCount "108"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Qc2 h6 8. Bh4 0-0 9. 0-0-0 Qa5 10. Nd2 e5 11. Nb3 Qd8 12. dxe5 Nxe5 13. Bg3 Ng6 14. Bd3 Qe8 15. Kb1 dxc4 16. Bxc4 Be6 17. Bxe6 fxe6 18. Nd4 Bb4 19. Ne4 Nd5 20. a3 e5 21. Nb5 Rd8 22. Qb3 Qf7 23. axb4 cxb5 24. Rd3 Nxb4 25. Qxf7+ Kxf7 26. Rb3 a5 27. Rc1 Rd7 28. Nc3 Nd3 29. Rd1 b4 30. Na4 Nc5 31. Rxd7+ Nxd7 32. Rd3 Ke6 33. f4 b5 34. fxe5 bxa4 35. Rd6+ Ke7 36. Rxg6 Rf1+ 37. Kc2 b3+ 38. Kc3 Rc1+ 39. Kd2 Rc2+ 40. Kd1 Rxb2 41. Bh4+ Ke8 42. e6 Nf8 43. Rxg7 Nxe6 44. Re7+ Kf8 45. Ra7 Rxg2 46. Bf6 Rxh2 47. Kc1 Nc5 48. Rxa5 Nd3+ 49. Kd1 b2 50. Bxb2 Nxb2+ 51. Kc1 Kf7 52. Kb1 h5 53. e4 h4 54. Ra7+ Ke6 0-1

[Event "Uniagraria AlphaZero op 2nd"]
[Site "Uniagraria"]
[Date "2019.11.09"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Rojas Barrero, Andres Humberto"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "2173"]
[PlyCount "74"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. Bf4 e6 4. e3 c5 5. c3 Nc6 6. Bd3 Nh5 7. Be5 f6 8. Bg3 g6 9. Qc2 Kf7 10. Nbd2 cxd4 11. exd4 Bd6 12. Nh4 Rg8 13. 0-0-0 Nf4 14. Bxf4 Bxf4 15. g3 Bd6 16. f4 Bd7 17. Nhf3 Qa5 18. Kb1 Rac8 19. h4 h5 20. Rhf1 Be7 21. Rde1 f5 22. Qd1 b5 23. Qe2 Qb6 24. Ne5+ Nxe5 25. Qxe5 Bf6 26. Qe2 Rc7 27. Nf3 Rgc8 28. Ne5+ Bxe5 29. fxe5 b4 30. g4 bxc3 31. gxf5 exf5 32. Bxf5 Bxf5+ 33. Rxf5+ gxf5 34. Qxh5+ Qg6 35. e6+ Kg7 36. Qe2 c2+ 37. Kc1 Qh6+ 0-1

[Event "Bogota AlphaZero op"]
[Site "Bogota"]
[Date "2018.08.20"]
[Round "6"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Mora Suarez, Juan Felipe"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "1926"]
[BlackElo "1789"]
[PlyCount "75"]
[EventDate "2018.08.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. Nc3 Nf6 7. f3 0-0 8. Bc4 Qb6 9. Bb3 Nxe4 10. Nd5 Qa5+ 11. c3 Nf6 12. Nxc6 dxc6 13. Nxe7+ Kh8 14. Nxc8 Raxc8 15. 0-0 Rcd8 16. Qe2 Nd5 17. Bf2 Nf4 18. Qe7 Rde8 19. Qxb7 Qg5 20. g3 Re2 21. Kh1 Nh3 22. Kg2 Qd2 23. Qxa7 Ng5 24. Bc4 Ree8 25. Qc5 f5 26. Rab1 Re5 27. Qd4 Qe2 28. Qd1 f4 29. Qxe2 Rxe2 30. g4 Rd8 31. Rfe1 Rdd2 32. Rxe2 Rxe2 33. Re1 Rxe1 34. Bxe1 h5 35. h4 Nh7 36. g5 Bf8 37. Bf2 Bd6 38. Bd4+ 1-0

[Event "Bogota AlphaZero op"]
[Site "Bogota"]
[Date "2018.08.20"]
[Round "7"]
[White "Valle, Efrain"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "2139"]
[BlackElo "1926"]
[PlyCount "63"]
[EventDate "2018.08.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. c4 c6 2. g3 d5 3. cxd5 cxd5 4. Bg2 Nf6 5. Nf3 e6 6. 0-0 Be7 7. d4 0-0 8. Nc3 Nc6 9. Bf4 Bd6 10. Bg5 Be7 11. Rc1 Re8 12. a3 Ne4 13. Bxe7 Rxe7 14. e3 Nxc3 15. Rxc3 Rc7 16. Qc2 Bd7 17. b4 Rac8 18. Qd2 Nxd4 19. Rxc7 Nxf3+ 20. Bxf3 Qxc7 21. e4 Qc3 22. Qd1 d4 23. e5 Bc6 24. Bxc6 Rxc6 25. Qa4 a6 26. Qa5 Rc8 27. Qb6 d3 28. Qxb7 d2 29. Qxa6 Qc1 30. Qd3 Qxf1+ 31. Kxf1 Rc1+ 32. Ke2 1-0

[Event "Bogota AlphaZero op"]
[Site "Bogota"]
[Date "2018.08.19"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Torrente, Andres Felipe"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1926"]
[BlackElo "1699"]
[PlyCount "74"]
[EventDate "2018.08.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 Bf5 4. e3 c5 5. Bxb8 Rxb8 6. Bb5+ Bd7 7. Bd3 Qb6 8. b3 cxd4 9. exd4 Bg4 10. Nbd2 e6 11. 0-0 Bb4 12. Qc1 Bc3 13. Qa3 Bxa1 14. Rxa1 a6 15. c4 Rd8 16. Rc1 Bxf3 17. Nxf3 Qd6 18. c5 Qe7 19. Qa4+ Nd7 20. c6 bxc6 21. Qxc6 0-0 22. Bxa6 Nb8 23. Qb5 Nxa6 24. Qxa6 Ra8 25. Qe2 Qa3 26. Ra1 Rfc8 27. Qd2 Rc7 28. Ne1 Rac8 29. Nd3 Rc2 30. Qf4 Rxa2 31. Rf1 Qxb3 32. Ne5 Qb7 33. h4 Qc7 34. h5 f6 35. Qg4 fxe5 36. Qxe6+ Kh8 37. h6 gxh6 0-1

[Event "Bogota AlphaZero op"]
[Site "Bogota"]
[Date "2018.08.19"]
[Round "5"]
[White "Ramirez Perez, Jose Alexis"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B24"]
[WhiteElo "1717"]
[BlackElo "1926"]
[PlyCount "114"]
[EventDate "2018.08.17"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. e4 c5 2. g3 Nc6 3. Bg2 d6 4. Nc3 Nf6 5. d3 Bg4 6. Nge2 e5 7. 0-0 Qd7 8. Be3 h5 9. f3 Bh3 10. Nd5 Nxd5 11. exd5 Ne7 12. c4 h4 13. g4 Bxg2 14. Kxg2 h3+ 15. Kg1 f5 16. Nc3 Rh4 17. Bg5 Rh8 18. Qa4 Qxa4 19. Nxa4 Nc8 20. Nc3 Be7 21. Bxe7 Nxe7 22. Kf2 Ng6 23. gxf5 Nf4 24. Ke3 Kd7 25. Ne4 Raf8 26. Ng3 b5 27. b3 a5 28. a4 bxc4 29. bxc4 Rb8 30. Rab1 Rb4 31. Rxb4 axb4 32. Kd2 Ra8 33. Ra1 Ke7 34. Kc2 Ra5 35. Ra2 Ng2 36. Kd2 Ra6 37. Ne4 Nh4 38. Ng5 Kf6 39. Nxh3 Nxf3+ 40. Kc1 Nd4 41. Kb2 Kxf5 42. Ra1 Ne2 43. Rf1+ Kg4 44. Ng1 Nf4 45. Rf3 Rxa4 46. Rg3+ Kf5 47. Rxg7 Nxd3+ 48. Kc2 e4 49. h4 Ra2+ 50. Kb1 Rb2+ 51. Ka1 Rh2 52. Rg5+ Kf4 53. Rg6 Ke5 54. Re6+ Kd4 55. Rxd6 Kxc4 56. Rd8 Rh1 57. Rg8 Kxd5 0-1

[Event "Bogota Navidad op"]
[Site "Bogota"]
[Date "2016.12.10"]
[Round "7"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Garvin, Ricardo Luis"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "1950"]
[BlackElo "1686"]
[PlyCount "95"]
[EventDate "2016.12.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 0-0 5. Be2 d6 6. 0-0 h6 7. h3 b6 8. c4 Bb7 9. Nc3 Nbd7 10. Qc2 Nh5 11. Bh2 f5 12. Nh4 e6 13. Nxg6 Qg5 14. Ne7+ Qxe7 15. Bxh5 Qg5 16. g4 Bf3 17. Bg3 fxg4 18. Bxg4 Bxg4 19. hxg4 Qxg4 20. Qe4 Qxe4 21. Nxe4 Nf6 22. Nxf6+ Rxf6 23. Kg2 Rg6 24. Kf3 Rf8+ 25. Ke4 Rg4+ 26. Kd3 c5 27. Bxd6 Rd8 28. Bg3 cxd4 29. e4 e5 30. Rh1 Rf8 31. Rh5 Rf3+ 32. Ke2 Rfxg3 33. fxg3 Rxe4+ 34. Kf2 d3 35. Re1 Rxc4 36. Ke3 e4 37. Rd5 Bxb2 38. Rd7 a5 39. Rb1 Bc1+ 40. Rxc1 Rxc1 41. Kxe4 Ra1 42. Rxd3 Rxa2 43. Rd6 b5 44. Rxh6 Kg7 45. Rb6 b4 46. Kd4 Rg2 47. Rb5 Rxg3 48. Rxa5 1/2-1/2

[Event "Bogota Navidad op"]
[Site "Bogota"]
[Date "2016.12.10"]
[Round "6"]
[White "Vargas, David"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1/2-1/2"]
[ECO "B10"]
[BlackElo "1950"]
[PlyCount "87"]
[EventDate "2016.12.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. c4 c6 2. e4 d5 3. e5 dxc4 4. Bxc4 Qd4 5. Qe2 Bg4 6. Nf3 Bxf3 7. gxf3 e6 8. Qe4 Bc5 9. 0-0 Nd7 10. Qxd4 Bxd4 11. f4 Ne7 12. Nc3 Nc5 13. a4 a5 14. Ne2 Nf5 15. Ra3 Rd8 16. d3 Nd7 17. Bd2 Bc5 18. Rb3 b6 19. Bc3 Nf8 20. Rd1 Ng6 21. d4 Ngh4 22. Rd3 Bb4 23. Bxb4 axb4 24. Rxb4 Nxd4 25. Nxd4 Rxd4 26. Rxd4 Nf3+ 27. Kg2 Nxd4 28. Rxb6 0-0 29. b4 Ra8 30. a5 Kf8 31. Bd3 Ke8 32. Be4 Kd8 33. Bxc6 Nxc6 34. Rxc6 Rb8 35. Rc4 Rb5 36. Kf3 h6 37. h4 f6 38. Ke4 f5+ 39. Ke3 Kd7 40. h5 Kd8 41. f3 Kd7 42. a6 Rb6 43. b5 Rxb5 44. Ra4 1/2-1/2

[Event "Bogota Navidad op"]
[Site "Bogota"]
[Date "2016.12.08"]
[Round "3"]
[White "Cardoso Cardoso, Jaidy Marcela"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D61"]
[WhiteElo "1716"]
[BlackElo "1950"]
[PlyCount "51"]
[EventDate "2016.12.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Be7 7. Bd3 0-0 8. 0-0 dxc4 9. Bxc4 Re8 10. Qc2 b6 11. e4 Bb7 12. Rad1 h6 13. Bf4 Qc8 14. h3 Ba6 15. Bxa6 Qxa6 16. Rfe1 Rac8 17. a3 Bd8 18. Ne5 c5 19. Nxd7 Nxd7 20. d5 exd5 21. exd5 Bf6 22. Qf5 Bxc3 23. bxc3 Nf6 24. Bxh6 Rxe1+ 25. Rxe1 Nxd5 26. Qg5 1-0

[Event "Bogota Navidad op"]
[Site "Bogota"]
[Date "2016.12.07"]
[Round "1"]
[White "Zambrano, Carlos Augusto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1802"]
[BlackElo "1950"]
[PlyCount "79"]
[EventDate "2016.12.07"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 176 Extra"]
[Source "ChessBase"]
[SourceDate "2017.03.02"]
[SourceVersion "1"]
[SourceVersionDate "2017.03.02"]
[SourceQuality "1"]

1. e4 e6 2. f4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. g3 a6 7. Bg2 Nc6 8. d3 Be7 9. 0-0 0-0 10. Ne2 f6 11. exf6 Bxf6 12. c3 Qb6 13. Qc2 Ne7 14. Be3 Nf5 15. Bf2 Qc7 16. Rfe1 Nd6 17. Rad1 b5 18. b3 Bb7 19. Qc1 Rae8 20. d4 a5 21. Ne5 a4 22. Nxd7 Qxd7 23. dxc5 Nf5 24. Nd4 Nh6 25. h3 e5 26. c6 Qd8 27. cxb7 exd4 28. Rxe8 Rxe8 29. cxd4 Qd7 30. Qc5 Rd8 31. Qxd5+ Qxd5 32. Bxd5+ Kf8 33. Bc6 Nf5 34. d5 Be7 35. g4 Nd6 36. bxa4 bxa4 37. Rb1 Nxb7 38. Rxb7 Bd6 39. f5 a3 40. Bd4 1-0

[Event "COL-chT Cup"]
[Site "Bogota"]
[Date "2015.06.07"]
[Round "3.3"]
[White "Montenegro, Juan Rolando"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2123"]
[BlackElo "1953"]
[PlyCount "75"]
[EventDate "2015.06.06"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]
[WhiteTeam "Marca"]
[BlackTeam "Bogota Fraternarios"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "COL"]

1. e4 e6 2. d3 b6 3. Nf3 Bb7 4. g3 d5 5. Nbd2 Nf6 6. Qe2 Bb4 7. e5 Nfd7 8. Bg2 a5 9. 0-0 0-0 10. Re1 a4 11. a3 Be7 12. h4 c5 13. Nf1 Nc6 14. N1h2 Qc7 15. Bf4 b5 16. Ng4 Nd4 17. Nxd4 cxd4 18. Bg5 Rfe8 19. Bxe7 Rxe7 20. h5 h6 21. Qd2 Kh7 22. Rac1 f5 23. exf6 Nxf6 24. Ne5 Nxh5 25. g4 Nf6 26. c3 dxc3 27. Rxc3 Qd6 28. d4 Nd7 29. Qd3+ Kg8 30. g5 hxg5 31. Qg6 Nf6 32. Rh3 Bc6 33. Qxg5 Be8 34. Bf3 Nh7 35. Rxh7 Kxh7 36. Kg2 Kg8 37. Rh1 Rf7 38. Qh4 1-0

[Event "COL-chT Cup"]
[Site "Bogota"]
[Date "2015.06.07"]
[Round "4.3"]
[White "Rua, Nora L"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D46"]
[WhiteElo "1925"]
[BlackElo "1953"]
[PlyCount "80"]
[EventDate "2015.06.06"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]
[WhiteTeam "Valle (Women)"]
[BlackTeam "Bogota Fraternarios"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "COL"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. e3 Be7 6. Bd3 Nbd7 7. 0-0 0-0 8. e4 dxe4 9. Nxe4 Nxe4 10. Bxe4 Nf6 11. Bc2 h6 12. h3 c5 13. Re1 cxd4 14. Nxd4 a6 15. Bf4 Qa5 16. Qd3 Rd8 17. Be5 Bd7 18. Bxf6 Bxf6 19. Qh7+ Kf8 20. Nf5 g6 21. Nxh6 Be8 22. Qg8+ Ke7 23. Bxg6 Qg5 24. Nxf7 Qxg2+ 25. Kxg2 Bc6+ 26. Kh2 Rxg8 27. Rg1 Rxg6 28. Rxg6 Kxf7 29. Rg4 Be5+ 30. f4 Bxb2 31. Rb1 Bf6 32. Rd1 Rh8 33. Rd3 Rh5 34. Kg3 Rc5 35. h4 Rxc4 36. f5 Be5+ 37. Kh3 Rc2 38. fxe6+ Kxe6 39. Rg5 Be4 40. Re3 Bf5+ 0-1

[Event "COL-chT Cup"]
[Site "Bogota"]
[Date "2015.06.06"]
[Round "2.3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Vanegas, Mateo de Jesus"]
[Result "1-0"]
[ECO "B62"]
[WhiteElo "1953"]
[BlackElo "1560"]
[PlyCount "55"]
[EventDate "2015.06.06"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]
[WhiteTeam "Bogota Fraternarios"]
[BlackTeam "Bogota Kallipa"]
[WhiteTeamCountry "COL"]
[BlackTeamCountry "COL"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. 0-0 Be7 8. Bg5 0-0 9. Kh1 Nc6 10. f4 d6 11. Rf3 Qb6 12. Nxc6 bxc6 13. e5 dxe5 14. fxe5 Ng4 15. Bxe7 Re8 16. Bh4 Qxb2 17. Rb1 Qa3 18. Nb5 Qa5 19. Nd6 Rd8 20. Bxd8 Qxd8 21. Nxf7 Qxd1+ 22. Rxd1 Bb7 23. Rd8+ Rxd8 24. Nxd8 Ba8 25. Nxe6 h6 26. Rf8+ Kh7 27. Bxg4 Bb7 28. Nc5 1-0

[Event "Bogota Distrital-ch 77th"]
[Site "Bogota"]
[Date "2015.05.03"]
[Round "6"]
[White "Ruiz Aguilar, Pablo Alexander"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2297"]
[BlackElo "1932"]
[PlyCount "89"]
[EventDate "2015.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Nge7 6. a3 Bd7 7. Be2 cxd4 8. cxd4 Qb6 9. Nc3 Nf5 10. Na4 Qc7 11. g4 Nfe7 12. Be3 Ng6 13. Rc1 Be7 14. b4 Qd8 15. Nc5 Bc8 16. Bb5 Bxc5 17. Bxc6+ bxc6 18. Rxc5 Bd7 19. h4 h6 20. Ra5 Qb8 21. Nd2 Ne7 22. h5 f6 23. Bf4 0-0 24. Qe2 c5 25. Rxc5 Nc6 26. Nf3 a5 27. b5 fxe5 28. Bxe5 Nxe5 29. Nxe5 Be8 30. 0-0 Rf4 31. Qd2 Rf6 32. a4 Qd6 33. Rfc1 Qf8 34. Rc8 Rxc8 35. Rxc8 Qe7 36. Qxa5 Rf8 37. Qc3 Qg5 38. Qe3 Qe7 39. Ng6 Bxg6 40. Rxf8+ Qxf8 41. hxg6 Qf6 42. Qd3 Qf4 43. Qe2 Qf6 44. Qc2 Qd8 45. b6 1-0

[Event "Bogota Distrital-ch 77th"]
[Site "Bogota"]
[Date "2015.05.02"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Garcia Alarcon, Alvaro"]
[Result "1-0"]
[ECO "A82"]
[WhiteElo "1932"]
[BlackElo "2175"]
[PlyCount "124"]
[EventDate "2015.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. d4 f5 2. e4 d6 3. Nc3 Nf6 4. Bd3 e6 5. Nf3 Be7 6. 0-0 0-0 7. Ng5 Nc6 8. exf5 exf5 9. Re1 d5 10. Ne2 Ne4 11. Nf3 Nb4 12. Bb5 c6 13. Ba4 Bd6 14. c3 Na6 15. Bf4 Nc7 16. Bxd6 Qxd6 17. Ne5 Qh6 18. Qd3 f4 19. f3 Nd6 20. Bb3 Rf5 21. Qd2 Be6 22. Ng4 Qg5 23. Bc2 Rff8 24. Ne5 Bf5 25. Bxf5 Qxf5 26. b3 Rae8 27. a4 Re6 28. Nc1 g5 29. Ncd3 h5 30. Nc5 Re7 31. Ned7 Rxd7 32. Re5 Qh7 33. Nxd7 Qxd7 34. Rxg5+ Kh7 35. Rxh5+ Kg6 36. Re5 Ne6 37. Rae1 Ng7 38. g4 Kf7 39. Qxf4+ Kg8 40. Qe3 Qf7 41. Kg2 Qg6 42. Rg5 Qf7 43. h4 Kh7 44. Qd3+ Kh8 45. h5 Ne4 46. Rxe4 dxe4 47. Qxe4 Qf4 48. Qxf4 Rxf4 49. Kg3 Rf7 50. Re5 Kh7 51. f4 b6 52. b4 c5 53. dxc5 bxc5 54. Rxc5 Ne6 55. Rc4 Rd7 56. Re4 Nc7 57. c4 Kg7 58. g5 Kf7 59. f5 Na6 60. c5 Nc7 61. h6 Nd5 62. g6+ Kf6 1-0

[Event "Bogota Distrital-ch 77th"]
[Site "Bogota"]
[Date "2015.05.01"]
[Round "3"]
[White "Lopez, Alberto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "2134"]
[BlackElo "1932"]
[PlyCount "38"]
[EventDate "2015.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. Be2 Nf6 6. Bg5 Bd6 7. h3 Bh5 8. Nc3 c6 9. Ne5 Bxe2 10. Qxe2 0-0 11. 0-0 Re8 12. f4 Nbd7 13. Qd3 Qb6 14. a3 Nxe5 15. fxe5 Bxe5 16. Ne2 Ne4 17. Be3 Bd6 18. Bf4 Re6 19. c3 Rae8 0-1

[Event "Bogota Distrital-ch 77th"]
[Site "Bogota"]
[Date "2015.04.30"]
[Round "1"]
[White "Gomez Leon, Sebastian"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "1556"]
[BlackElo "1932"]
[PlyCount "34"]
[EventDate "2015.04.30"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Qe7 6. cxd4 d6 7. Bb5 Bd7 8. 0-0 dxe5 9. Bxc6 Bxc6 10. Nxe5 Qd6 11. Re1 0-0-0 12. Nxf7 Qd5 13. f3 Qxf7 14. a3 Qh5 15. Bf4 Rxd4 16. Qc1 Bc5 17. Kh1 Bxf3 0-1

[Event "Tercer Piso op"]
[Site "Tercer Piso"]
[Date "2015.03.22"]
[Round "4"]
[White "Contreras R, Wilson Mauricio"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D60"]
[WhiteElo "1804"]
[BlackElo "1942"]
[PlyCount "63"]
[EventDate "2015.03.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 165 Extra"]
[Source "ChessBase"]
[SourceDate "2015.04.21"]
[SourceVersion "1"]
[SourceVersionDate "2015.04.21"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Be2 0-0 8. 0-0 Re8 9. Rc1 a6 10. cxd5 Nxd5 11. Bxe7 Qxe7 12. e4 Nf4 13. e5 Nxe2+ 14. Qxe2 Nb6 15. Ne4 Nd5 16. Nd6 Rd8 17. Qd2 f5 18. Qg5 Rb8 19. Qxe7 Nxe7 20. Rfd1 Bd7 21. Nd2 Nd5 22. N2c4 b6 23. Ne3 Nf4 24. Rd2 g5 25. g4 Ng6 26. gxf5 Nh4 27. Rd3 exf5 28. d5 Nf3+ 29. Kh1 Nxe5 30. Rdc3 f4 31. Nef5 cxd5 32. Rc7 0-1

[Event "Tercer Piso op"]
[Site "Tercer Piso"]
[Date "2015.03.22"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Torres, Jose Leonardo"]
[Result "0-1"]
[ECO "A85"]
[WhiteElo "1942"]
[BlackElo "1929"]
[PlyCount "58"]
[EventDate "2015.03.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 165 Extra"]
[Source "ChessBase"]
[SourceDate "2015.04.21"]
[SourceVersion "1"]
[SourceVersionDate "2015.04.21"]
[SourceQuality "1"]

1. d4 f5 2. f3 e6 3. c4 Nf6 4. Nc3 d5 5. Bf4 c6 6. c5 Be7 7. Nh3 0-0 8. e3 h6 9. Bd3 Bd7 10. Qc2 Be8 11. Nf2 Nh5 12. Be5 Nd7 13. g4 fxg4 14. fxg4 Bh4 15. 0-0 Qg5 16. Qe2 Bxf2+ 17. Rxf2 Rxf2 18. Kxf2 Nhf6 19. Bxf6 Nxf6 20. h3 Bg6 21. Kg3 Bxd3 22. Qxd3 h5 23. Rf1 Rf8 24. Qe2 Qg6 25. Rh1 hxg4 26. hxg4 Ne4+ 27. Nxe4 Qxe4 28. Rh5 Rf6 29. Re5 Qh1 0-1

[Event "Tercer Piso op"]
[Site "Tercer Piso"]
[Date "2015.03.21"]
[Round "2"]
[White "Gaitan Bautista, Oscar"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "1683"]
[BlackElo "1942"]
[PlyCount "42"]
[EventDate "2015.03.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 165 Extra"]
[Source "ChessBase"]
[SourceDate "2015.04.21"]
[SourceVersion "1"]
[SourceVersionDate "2015.04.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 d6 5. Bc4 Be7 6. 0-0 Bg4 7. dxe5 dxe5 8. Qxd8+ Rxd8 9. Ng5 0-0 10. Be3 Nd4 11. f3 Nxc2 12. Bf2 Nxa1 13. fxg4 Nc2 14. b3 a6 15. h3 b5 16. Be2 Bb4 17. Nb1 h6 18. Nf3 Nxe4 19. Nxe5 Nxf2 20. Kxf2 Bc5+ 21. Kf3 Nd4+ 0-1

[Event "Tercer Piso op"]
[Site "Tercer Piso"]
[Date "2015.03.21"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Mena, Yamil Octavio"]
[Result "0-1"]
[ECO "A51"]
[WhiteElo "1942"]
[BlackElo "1964"]
[PlyCount "112"]
[EventDate "2015.03.21"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 165 Extra"]
[Source "ChessBase"]
[SourceDate "2015.04.21"]
[SourceVersion "1"]
[SourceVersionDate "2015.04.21"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e5 3. d5 Bc5 4. Nc3 e4 5. Qc2 Qe7 6. e3 d6 7. Nge2 Bf5 8. b4 Bb6 9. Bb2 0-0 10. Na4 Nbd7 11. Nxb6 axb6 12. Nd4 Bg6 13. Be2 Ne5 14. 0-0 Rfc8 15. b5 Nfd7 16. Nb3 Nd3 17. Bxd3 exd3 18. Qc3 f6 19. a4 c6 20. bxc6 bxc6 21. dxc6 Rxc6 22. Nd4 Rc5 23. Ba3 Rh5 24. Qb4 Nc5 25. Qxb6 Be4 26. f3 Qe5 27. g3 Bg6 28. Bc1 Rxa4 29. Rxa4 Nxa4 30. Qb8+ Be8 31. f4 Qe7 32. g4 Rh4 33. Kg2 Rxg4+ 34. Kf3 Qf8 35. h3 Rg1 36. Kf2 Rxf1+ 37. Kxf1 Nc5 38. Bd2 Bf7 39. Qc7 Bxc4 40. Nf5 Be6 41. Nxd6 Bxh3+ 42. Ke1 Ne6 43. Qc6 Bg2 44. Qa6 Qa8 45. Qxd3 Bh3 46. e4 Qa1+ 47. Kf2 Qh1 48. Qg3 Qf1+ 49. Ke3 Qa6 50. e5 fxe5 51. fxe5 Qb6+ 52. Ke2 Nd4+ 53. Ke1 Qb1+ 54. Kf2 Qf1+ 55. Ke3 Nc2+ 56. Ke4 Bg2+ 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.07"]
[Round "11"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Agudelo, Carlos Hernan"]
[Result "0-1"]
[ECO "A83"]
[WhiteElo "1943"]
[BlackElo "2065"]
[PlyCount "48"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. Bxf6 exf6 6. Nxe4 d5 7. Ng3 Bb4+ 8. c3 Bd6 9. Bd3 0-0 10. N1e2 f5 11. 0-0 f4 12. Nh1 f3 13. gxf3 Bh3 14. Re1 h5 15. f4 Bxf4 16. Nxf4 Rxf4 17. Re5 Rg4+ 18. Ng3 h4 19. Bxg6 Rxg6 20. Qh5 Kg7 21. Rae1 Nc6 22. Re8 Qxe8 23. Rxe8 Rxe8 24. f4 Rh8 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.06"]
[Round "9"]
[White "Suarez, Luis Humberto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "2110"]
[BlackElo "1943"]
[PlyCount "30"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bd3 Bd6 6. 0-0 0-0 7. Bg5 Bg4 8. c3 c6 9. Nbd2 Nbd7 10. Qc2 Qc7 11. Bf5 Bf4 12. Bxg4 Bxg5 13. Qf5 Nxg4 14. Qxg5 Nh6 15. Rfe1 Rfe8 1/2-1/2

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.05"]
[Round "7"]
[White "Munoz, Julian Andres"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2002"]
[BlackElo "1943"]
[PlyCount "92"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c5 3. e3 cxd4 4. exd4 Nf6 5. Bd3 Bg4 6. 0-0 Nc6 7. c3 e6 8. Nbd2 Bd6 9. h3 Bh5 10. Re1 Rc8 11. Be2 0-0 12. Ne5 Bxe2 13. Qxe2 h6 14. Nf1 Ne4 15. f3 Nf6 16. Bf4 Nh5 17. Bd2 Qh4 18. Ng6 Qf6 19. Nxf8 Kxf8 20. g4 Nf4 21. Bxf4 Bxf4 22. Ne3 Qh4 23. Nf1 Qxh3 24. Qg2 Qh4 25. Qh1 Qf6 26. Qg2 Ne7 27. Ng3 Qg5 28. Nh5 Bc7 29. f4 Bxf4 30. Nxf4 Qxf4 31. Re5 Qf6 32. Rf1 Qg6 33. Rf3 Rc6 34. b3 Ra6 35. Kh2 Ng8 36. g5 Qb1 37. Re2 Qg6 38. Re5 Qb1 39. Rf2 Qd3 40. Rxd5 exd5 41. Qxd5 f6 42. Qd8+ Kf7 43. Qd5+ Re6 44. Qd7+ Ne7 45. d5 Qxd5 46. g6+ Kxg6 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.05"]
[Round "8"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Castaneda, Jorge Luis"]
[Result "0-1"]
[ECO "E32"]
[WhiteElo "1943"]
[BlackElo "2199"]
[PlyCount "86"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. Nf3 b6 6. a3 Bxc3+ 7. Qxc3 Bb7 8. Bg5 d6 9. e3 Nbd7 10. Be2 Qe8 11. Bxf6 Nxf6 12. Rc1 Ne4 13. Qc2 f5 14. 0-0 Rf6 15. c5 Bd5 16. cxd6 cxd6 17. Ne1 Rf8 18. Nd3 Rc8 19. Qd1 Rxc1 20. Qxc1 Qd7 21. Nf4 Rc8 22. Qd1 Bb7 23. d5 e5 24. Ne6 Nf6 25. Qd2 Bxd5 26. Ng5 Qc6 27. Rd1 g6 28. Qb4 h6 29. Nh3 Qc5 30. Qh4 Kg7 31. Bd3 Bc6 32. Qg3 Qd5 33. f4 e4 34. Be2 Qc5 35. b4 Qc2 36. Qe1 Bd5 37. Bf1 Qc3 38. Qf2 Ng4 39. Qh4 Qxe3+ 40. Kh1 Nf6 41. Nf2 Rc1 42. g4 Rxd1 43. Nxd1 Qf3+ 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.04"]
[Round "6"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Gamboa, Jose Pompilio"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1943"]
[BlackElo "1778"]
[PlyCount "99"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nc6 3. c4 e6 4. Nc3 Bb4 5. Bg5 f6 6. Bh4 Nge7 7. e3 0-0 8. Qb3 Kh8 9. Be2 a5 10. 0-0 Bxc3 11. Qxc3 Nf5 12. Bg3 Nxg3 13. hxg3 b6 14. Rac1 Ba6 15. Kh2 Ne7 16. Rh1 Nf5 17. b3 Nd6 18. Bd3 Ne4 19. Qc2 Bb7 20. Kg1 Rc8 21. Nh4 Kg8 22. f3 Ng5 23. g4 c5 24. dxc5 Rxc5 25. Kf2 b5 26. Bxh7+ Nxh7 27. Ng6 f5 28. Nxf8 Qxf8 29. gxf5 exf5 30. Rh4 Nf6 31. Rch1 Qe7 32. Rf4 g6 33. Qc3 dxc4 34. bxc4 b4 35. Qd3 g5 36. Rd4 Ba6 37. Rd6 Bb7 38. Rh6 Ne8 39. Rd7 Qe5 40. Rxb7 Qb2+ 41. Kg1 Qc1+ 42. Kh2 Qc3 43. Qd7 Qe5+ 44. f4 Rc7 45. Rg6+ Kf8 46. Rxc7 Qxc7 47. Rf6+ Nxf6 48. Qxc7 Ng4+ 49. Kg3 Nxe3 50. Qc5+ 1-0

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.03"]
[Round "5"]
[White "Dabraccio, Guillermo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1752"]
[BlackElo "1943"]
[PlyCount "94"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Bd6 6. Ne5 0-0 7. Nd2 c4 8. Be2 Nc6 9. Bg3 Qc7 10. f4 b5 11. 0-0 a5 12. Qc2 Ne7 13. Bf2 Bb7 14. Bf3 b4 15. g4 Nd7 16. Bg2 f6 17. Nxd7 Qxd7 18. Bg3 Ra7 19. Nf3 a4 20. Qd2 Nc6 21. Rfb1 a3 22. Be1 Rfa8 23. Qc2 axb2 24. Qxb2 Ra3 25. cxb4 Rxe3 26. b5 Na5 27. Bxa5 Rxa5 28. Qd2 Rea3 29. Ne1 c3 30. Qc1 Qc7 31. Nc2 Rxa2 32. Qe1 Kf7 33. f5 e5 34. Rxa2 Rxa2 35. Qd1 exd4 36. g5 Bxh2+ 37. Kh1 g6 38. fxg6+ hxg6 39. Qxd4 Be5 40. Bxd5+ Kf8 41. Qb4+ Bd6 42. Qe4 Qh7+ 43. Kg1 Qh2+ 44. Kf1 Rxc2 45. Qf3 f5 46. Bxb7 Bc5 47. Ke1 Qg1+ 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.03"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Ortiz, Jairo"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1943"]
[BlackElo "1725"]
[PlyCount "96"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 0-0 6. e3 Nbd7 7. cxd5 exd5 8. Bd3 c6 9. 0-0 Re8 10. Rc1 Nf8 11. Re1 Bg4 12. h3 Bh5 13. a3 Bg6 14. Na4 Ne6 15. Bh4 Qa5 16. b4 Qd8 17. Ne5 Bxd3 18. Qxd3 Nd7 19. Bxe7 Nxe5 20. Qf5 Rxe7 21. Qxe5 Qe8 22. Nc3 f6 23. Qg3 Nxd4 24. Red1 Nf5 25. Qf4 Qg6 26. e4 dxe4 27. Nxe4 h5 28. Nc5 Rae8 29. Kf1 Nh6 30. Rd3 Qf5 31. Qc4+ Kh7 32. Rcd1 Re2 33. Rf3 Qe5 34. Qd3+ Kh8 35. Kg1 b6 36. Nb3 Re1+ 37. Rxe1 Qxe1+ 38. Kh2 Qe5+ 39. g3 Qe2 40. Qc3 Qf1 41. Nd2 Qd1 42. Qxc6 Re1 43. Rd3 h4 44. g4 Re2 45. Qf3 Qe1 46. Rd8+ Kh7 47. Kg2 Rxd2 48. Ra8 Rd1 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.02"]
[Round "3"]
[White "Cespedes Rodriguez, Jaime"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D46"]
[WhiteElo "2138"]
[BlackElo "1943"]
[PlyCount "92"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 Nbd7 5. Nf3 e6 6. Qc2 Be7 7. Bd3 0-0 8. 0-0 a6 9. b3 Qa5 10. c5 Qc7 11. Bb2 Re8 12. Rfd1 e5 13. dxe5 Nxe5 14. Nxe5 Qxe5 15. Nxd5 Qxd5 16. Bxf6 Qxc5 17. Bxh7+ Kh8 18. Bxe7 Qxe7 19. Bd3 Qe5 20. Qc4 Re7 21. Bc2 Bf5 22. Bxf5 Qxf5 23. Rd4 Rae8 24. Rad1 Kg8 25. Rd8 Rxd8 26. Rxd8+ Kh7 27. h3 Rd7 28. Qh4+ Kg6 29. Rxd7 Qxd7 30. Qg4+ Qxg4 31. hxg4 Kf6 32. Kf1 c5 33. Ke2 Ke5 34. Kd3 b5 35. f4+ Kd5 36. e4+ Kd6 37. g5 g6 38. Ke3 Ke6 39. e5 Kd5 40. Kd3 a5 41. a4 c4+ 42. bxc4+ bxc4+ 43. Ke3 Kc5 44. f5 gxf5 45. e6 Kd6 46. exf7 Ke7 1-0

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.02"]
[Round "2"]
[White "Munoz, Alvaro E"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1739"]
[BlackElo "1943"]
[PlyCount "54"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. h3 Bd6 5. Nf3 h6 6. Nc3 Nf6 7. Bd3 0-0 8. 0-0 c6 9. Re1 Be6 10. Ne5 a6 11. f4 Qc8 12. Qf3 Bf5 13. g4 Bxd3 14. cxd3 Nbd7 15. Ne2 c5 16. Be3 cxd4 17. Nxd7 Qxd7 18. Bxd4 Qb5 19. Bxf6 gxf6 20. Kh1 Rfe8 21. b3 Qb4 22. Rf1 Qd2 23. Ng1 Re3 24. Qxd5 Rxd3 25. Qg2 Bxf4 26. Qxd2 Bxd2 27. Rxf6 Bc3 0-1

[Event "COL-ch"]
[Site "Ibague"]
[Date "2013.07.01"]
[Round "1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Barros, Raul Junior"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1943"]
[BlackElo "2161"]
[PlyCount "82"]
[EventDate "2013.07.01"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. Bg5 d6 6. e3 Nbd7 7. Be2 c6 8. 0-0 Qc7 9. Qc2 a5 10. a4 e5 11. Rac1 Re8 12. Rfd1 exd4 13. Nxd4 Nc5 14. Bf3 Ng4 15. Ndb5 cxb5 16. Nxb5 Qb8 17. Nxd6 Bd7 18. Bf4 Ne5 19. Nxe8 Bxa4 20. Bxe5 Bxe5 21. Qd2 Bxd1 22. Rxd1 Qxe8 23. Qd5 Qe7 24. h4 Bc7 25. Qg5 Qxg5 26. hxg5 Rd8 27. Rb1 Rd2 28. b4 axb4 29. Rxb4 Rc2 30. Kf1 b6 31. Rb1 Rxc4 32. Bd5 Rc2 33. f4 Rd2 34. Bf3 Rd3 35. Ke2 Rb3 36. Ra1 Rb2+ 37. Kf1 b5 38. Ra7 Bb6 39. Ra8+ Kg7 40. Rb8 Na4 41. e4 Be3 0-1

[Event "Ortega op 3rd"]
[Site "Ortega"]
[Date "2013.06.10"]
[Round "7"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Velez Alvarez, Laura Camila"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "1952"]
[BlackElo "1762"]
[PlyCount "71"]
[EventDate "2013.06.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "CBM 154 Extra"]
[Source "ChessBase"]
[SourceDate "2013.06.25"]
[SourceVersion "2"]
[SourceVersionDate "2013.06.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d6 5. Bg5 0-0 6. e3 Nbd7 7. Bd3 c6 8. Rc1 a6 9. 0-0 b5 10. b4 Nb6 11. Bxf6 Bxf6 12. c5 Nc4 13. Qc2 d5 14. h3 Re8 15. e4 e5 16. dxe5 Nxe5 17. Nxe5 Bxe5 18. exd5 cxd5 19. Ne2 Qh4 20. f4 Bg7 21. Rf3 d4 22. f5 Bh6 23. Rcf1 Be3+ 24. Kh2 g5 25. g4 Ra7 26. Kg2 Rc7 27. Ng3 Bb7 28. Be4 Bxe4 29. Nxe4 Qh6 30. f6 Bf4 31. Qd3 Qg6 32. Nd6 Bxd6 33. cxd6 Qxd3 34. Rxd3 Rd7 35. Rxd4 Re6 36. Rf5 1/2-1/2

[Event "Ortega op 3rd"]
[Site "Ortega"]
[Date "2013.06.09"]
[Round "6"]
[White "Puentes, Alvaro"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2100"]
[BlackElo "1952"]
[PlyCount "97"]
[EventDate "2013.06.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "CBM 154 Extra"]
[Source "ChessBase"]
[SourceDate "2013.06.25"]
[SourceVersion "2"]
[SourceVersionDate "2013.06.25"]
[SourceQuality "1"]

1. b4 a5 2. b5 b6 3. Bb2 Bb7 4. e3 Nf6 5. Nf3 g6 6. Be2 Bg7 7. 0-0 0-0 8. c4 c6 9. d4 d5 10. Nc3 Nbd7 11. cxd5 cxd5 12. Na4 Rc8 13. Rc1 Ne4 14. Bd3 Nd6 15. Qb3 Nf6 16. Ne5 Nfe4 17. Rfd1 Rxc1 18. Rxc1 e6 19. f3 Nd2 20. Qd1 N2c4 21. Nxc4 Nxc4 22. Bxc4 dxc4 23. Rxc4 Qg5 24. Nxb6 Qxe3+ 25. Kf1 Qf4 26. d5 Qxh2 27. Bxg7 Qh1+ 28. Ke2 Qxg2+ 29. Ke3 Kxg7 30. Qd4+ Kg8 31. Nd7 Qg1+ 32. Kd2 Qxd4+ 33. Rxd4 Rc8 34. d6 Rd8 35. Nc5 Bd5 36. d7 Kf8 37. Ra4 Ra8 38. Rxa5 Ke7 39. Rxa8 Bxa8 40. a4 h5 41. Ke3 g5 42. Kf2 h4 43. a5 f5 44. a6 g4 45. fxg4 fxg4 46. b6 g3+ 47. Kg1 Bc6 48. b7 h3 49. d8Q+ 1-0

[Event "Ortega op 3rd"]
[Site "Ortega"]
[Date "2013.06.08"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Martinez Romero, Martin"]
[Result "0-1"]
[ECO "D94"]
[WhiteElo "1952"]
[BlackElo "2405"]
[PlyCount "70"]
[EventDate "2013.06.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "CBM 154 Extra"]
[Source "ChessBase"]
[SourceDate "2013.06.25"]
[SourceVersion "2"]
[SourceVersionDate "2013.06.25"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. Nc3 d5 5. cxd5 Nxd5 6. e3 0-0 7. Be2 c5 8. Nxd5 Qxd5 9. dxc5 Qxc5 10. 0-0 Nc6 11. Qa4 Qb4 12. Qxb4 Nxb4 13. Bd2 Nc6 14. Bc3 Bxc3 15. bxc3 Rd8 16. Rfd1 Rxd1+ 17. Bxd1 b6 18. Bb3 Bb7 19. Ng5 e6 20. Rd1 Rd8 21. Kf1 Rxd1+ 22. Bxd1 Ne5 23. Bc2 Ba6+ 24. Kg1 Bc4 25. Bb3 Bxb3 26. axb3 Nd3 27. c4 Nc1 28. b4 Nd3 29. c5 bxc5 30. bxc5 Nxc5 31. Kf1 a5 32. Ke1 a4 33. Kd1 a3 34. Kc2 Nd3 35. Ne4 a2 0-1

[Event "Ortega op 3rd"]
[Site "Ortega"]
[Date "2013.06.08"]
[Round "3"]
[White "Pena Mora, Carlos"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "E10"]
[WhiteElo "1673"]
[BlackElo "1952"]
[PlyCount "60"]
[EventDate "2013.06.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "CBM 154 Extra"]
[Source "ChessBase"]
[SourceDate "2013.06.25"]
[SourceVersion "2"]
[SourceVersionDate "2013.06.25"]
[SourceQuality "1"]

1. c4 e6 2. d4 c6 3. Nf3 Nf6 4. a3 d5 5. cxd5 exd5 6. g3 Bd6 7. Bg2 0-0 8. 0-0 Bg4 9. h3 Bh5 10. Bg5 Re8 11. e3 Nbd7 12. Nbd2 Qb6 13. b4 Ne4 14. g4 Bg6 15. Nh4 Nxg5 16. f4 Rxe3 17. fxg5 Qxd4 18. Ndf3 Qb6 19. Qd4 Rae8 20. Nf5 Bxf5 21. Qxb6 axb6 22. gxf5 Ra8 23. Rfe1 Rxe1+ 24. Rxe1 Rxa3 25. Re8+ Nf8 26. b5 Ra1+ 27. Kf2 Ra2+ 28. Re2 Bc5+ 29. Kf1 Rxe2 30. Kxe2 Nd7 0-1

[Event "Ortega op 3rd"]
[Site "Ortega"]
[Date "2013.06.07"]
[Round "2"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Espinosa, J."]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1952"]
[BlackElo "2282"]
[PlyCount "98"]
[EventDate "2013.06.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "CBM 154 Extra"]
[Source "ChessBase"]
[SourceDate "2013.06.25"]
[SourceVersion "2"]
[SourceVersionDate "2013.06.25"]
[SourceQuality "1"]

1. d4 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bg7 5. e3 0-0 6. Be2 c6 7. 0-0 a6 8. a4 a5 9. Rb1 Na6 10. Nd2 Nb4 11. f3 e5 12. dxe5 dxe5 13. Nde4 Nxe4 14. Nxe4 Bf5 15. Bd2 Qe7 16. Bxb4 Qxb4 17. b3 Bh6 18. Qc1 Rad8 19. Rb2 Bxe4 20. fxe4 Rd2 21. Qxd2 Qxd2 22. Rxd2 Bxe3+ 23. Kh1 Bxd2 24. Rd1 Rd8 25. g3 Rd4 26. Bf3 Kf8 27. Kg2 Ke7 28. Kf2 f5 29. exf5 gxf5 30. Ke2 Bc3 31. Rxd4 Bxd4 32. h3 Kf6 33. Bg2 Kg5 34. Kf3 e4+ 35. Ke2 h5 36. Bh1 Bf6 37. Bg2 h4 38. g4 fxg4 39. Ke3 Kf5 40. Bxe4+ Ke5 41. hxg4 Bg5+ 42. Kf3 Kd4 43. Bc2 Kc3 44. Bd1 Kd2 45. Be2 Kc2 46. Ke4 Kxb3 47. Kf5 Bc1 48. g5 h3 49. g6 Bb2 0-1

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.25"]
[Round "6"]
[White "Manrique, Fernando"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1/2-1/2"]
[ECO "C14"]
[WhiteElo "1973"]
[BlackElo "1933"]
[PlyCount "86"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. h4 a6 7. Qg4 g6 8. Bxe7 Qxe7 9. h5 c5 10. hxg6 fxg6 11. Bd3 cxd4 12. Bxg6+ Kd8 13. Qxd4 Nc6 14. Qh4 Qxh4 15. Rxh4 Ncxe5 16. Bd3 Nxd3+ 17. cxd3 Ne5 18. Kd2 Ke7 19. b3 Kd6 20. d4 Ng6 21. Rh6 Bd7 22. g3 Rhf8 23. f4 Rf7 24. Nf3 Ne7 25. Ng5 Rg7 26. Rxh7 Rxh7 27. Nxh7 Nf5 28. Ne2 Rh8 29. Rh1 Bb5 30. g4 Bxe2 31. gxf5 Bf3 32. Rh6 Be4 33. Rxe6+ Kc7 34. Nf6 Rh2+ 35. Ke3 Rh3+ 36. Kf2 Rh2+ 37. Kg3 Rg2+ 38. Kh4 Bxf5 39. Nxd5+ Kd7 40. Rf6 Be6 41. Nc3 Ke7 42. Rh6 Rg4+ 43. Kh5 Rxf4 1/2-1/2

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.25"]
[Round "7"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Estrella Becerra, Fernando"]
[Result "0-1"]
[ECO "D40"]
[WhiteElo "1933"]
[BlackElo "2043"]
[PlyCount "94"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c5 4. e3 d5 5. Nf3 cxd4 6. exd4 Be7 7. Bd3 dxc4 8. Bxc4 0-0 9. 0-0 Nc6 10. a3 Qb6 11. d5 exd5 12. Nxd5 Nxd5 13. Bxd5 Bf6 14. Qc2 Nd4 15. Nxd4 Bxd4 16. Rb1 Bd7 17. Qe4 Bb5 18. Rd1 Bxf2+ 19. Kh1 Rae8 20. Qf5 Be2 21. Bf4 Bxd1 22. Rxd1 Qd4 23. Rf1 g6 24. Qg5 Qd3 25. Rc1 Be3 26. Bxe3 Qxe3 27. Qxe3 Rxe3 28. Kg1 Rfe8 29. Kf1 b6 30. b3 Kg7 31. Bc4 R8e5 32. Kf2 Re7 33. a4 R3e5 34. Rd1 Rc5 35. Rd4 Rf5+ 36. Kg3 h5 37. h3 g5 38. Bd3 Rfe5 39. Kf3 f5 40. Rd6 h4 41. g4 Re3+ 42. Kg2 R3e6 43. Rxe6 Rxe6 44. Bxf5 Re3 45. b4 Rg3+ 46. Kh2 Rb3 47. b5 Rb4 0-1

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.24"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Acuna Buitrago, Camilo Andres"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1933"]
[BlackElo "2075"]
[PlyCount "57"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 d6 5. Nf3 Nbd7 6. e3 c5 7. d5 Qa5 8. Qd2 h6 9. Bh4 Ng4 10. Be2 a6 11. 0-0 g5 12. Bg3 Nge5 13. Bxe5 Nxe5 14. Nxe5 Bxe5 15. Bh5 b5 16. cxb5 axb5 17. f4 gxf4 18. exf4 Bd4+ 19. Kh1 Bf5 20. Rfe1 Rg8 21. Qe2 Bf6 22. Qxb5+ Kf8 23. Qe2 Ra7 24. Ne4 Bg6 25. Ng3 Bxh5 26. Qxh5 Bxb2 27. Rab1 Qc3 28. Qxh6+ Ke8 29. Qxd6 1-0

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.24"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Prado, Leonardo"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1933"]
[BlackElo "1983"]
[PlyCount "81"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Bg5 0-0 5. Nf3 h6 6. Bf4 d5 7. e3 c6 8. Bd3 dxc4 9. Bxc4 b5 10. Bb3 b4 11. Ne2 Nd5 12. Be5 f6 13. Bg3 Kh7 14. Rc1 Qb6 15. Qc2 Bb7 16. 0-0 Na6 17. e4 Ndc7 18. Rfd1 Rac8 19. Nf4 Rcd8 20. Nh4 e5 21. Nfxg6 Rfe8 22. dxe5 fxe5 23. Bxe5 Rxd1+ 24. Rxd1 Bc8 25. Bxg7 Kxg7 26. Nf4 Qc5 27. Qxc5 Nxc5 28. Nh5+ Kh8 29. Bf7 Bg4 30. f3 Bxh5 31. Bxh5 Rb8 32. Rd6 N7e6 33. Bg4 Nf4 34. Rxc6 Ncd3 35. Rxh6+ Kg7 36. Nf5+ Kf7 37. Nd4 b3 38. axb3 Rb4 39. g3 Ng6 40. Be6+ Kf6 41. Bc4 1-0

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.23"]
[Round "2"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Valle, Efrain"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "1933"]
[BlackElo "2251"]
[PlyCount "81"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. Bg5 d6 6. h3 Nbd7 7. e3 c5 8. d5 Qa5 9. Qd2 a6 10. Be2 Rb8 11. a4 Nb6 12. 0-0 Bf5 13. e4 Bd7 14. e5 dxe5 15. Nxe5 Bf5 16. g4 Bc8 17. Bf4 Ra8 18. Rfd1 Nbd7 19. Nd3 Ne8 20. Ne4 Qxd2 21. Rxd2 b6 22. a5 f5 23. Ng5 Nd6 24. Rc2 b5 25. cxb5 c4 26. Nb4 fxg4 27. Ne6 axb5 28. Nxf8 Kxf8 29. Bxg4 Nc5 30. Bxc8 Nxc8 31. Ra3 Nb3 32. Bc7 Ke8 33. Nc6 Kd7 34. Bg3 e6 35. Nb8+ Ke7 36. Rxb3 cxb3 37. Rxc8 Bxb2 38. d6+ Kf7 39. d7 Bf6 40. Be5 Be7 41. Nc6 1-0

[Event "Bogota LAB op 03"]
[Site "Bogota"]
[Date "2013.03.22"]
[Round "1"]
[White "Dominguez Rincon, Miller Duvan"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "2054"]
[BlackElo "1933"]
[PlyCount "41"]
[EventDate "2013.03.22"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 153 Extra"]
[Source "ChessBase"]
[SourceDate "2013.04.22"]
[SourceVersion "1"]
[SourceVersionDate "2013.04.22"]
[SourceQuality "1"]

1. e4 e6 2. d4 Nf6 3. Bd3 d5 4. e5 Nfd7 5. Ne2 c5 6. c3 cxd4 7. cxd4 f5 8. Nf4 Bb4+ 9. Nc3 Qe7 10. 0-0 0-0 11. Ncxd5 exd5 12. Nxd5 Qh4 13. Nxb4 Qxd4 14. Qb3+ Kh8 15. Be3 Qxe5 16. Nd5 f4 17. Bxf4 Rxf4 18. Rae1 Qd6 19. Nxf4 Qxf4 20. Re8+ Nf8 21. Rxc8 1-0

[Event "Bogota McGregor op 3rd"]
[Site "Bogota"]
[Date "2012.12.15"]
[Round "6"]
[White "Hans, Bayer"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D02"]
[BlackElo "1950"]
[PlyCount "74"]
[EventDate "2012.12.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Bd6 6. Bg3 0-0 7. Bd3 b6 8. Nbd2 Re8 9. Bxd6 Qxd6 10. Ne5 Ba6 11. Ndf3 Bxd3 12. Qxd3 Nc6 13. 0-0 Rac8 14. a4 Ne4 15. Nxc6 Rxc6 16. Ne5 Rc7 17. f3 Nf6 18. f4 Ne4 19. f5 exf5 20. Rxf5 f6 21. Ng4 Rce7 22. c4 Qe6 23. Raf1 dxc4 24. Qd1 g6 25. R5f4 Kg7 26. Qf3 f5 27. Ne5 Nd2 28. Qh3 Nxf1 29. Kxf1 cxd4 30. exd4 Qd6 31. Rh4 h5 32. Qg3 Rxe5 33. dxe5 Rxe5 34. Qc3 Qd1+ 35. Kf2 Qe2+ 36. Kg3 g5 37. Rxc4 f4+ 0-1

[Event "Bogota McGregor op 3rd"]
[Site "Bogota"]
[Date "2012.12.15"]
[Round "7"]
[White "Sierra Fonseca, Edwin Andres"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2142"]
[BlackElo "1950"]
[PlyCount "79"]
[EventDate "2012.12.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. e4 e6 2. d3 d5 3. Qe2 Nf6 4. Nf3 Be7 5. g3 b6 6. e5 Nfd7 7. Bg2 Bb7 8. 0-0 c5 9. h4 h6 10. Re1 Nc6 11. c3 Qc7 12. d4 cxd4 13. cxd4 Nb4 14. Nc3 Ba6 15. Qd1 Nd3 16. Re3 Nxc1 17. Rxc1 Rc8 18. Ne2 Qb7 19. Rxc8+ Qxc8 20. Rc3 Qb8 21. Nf4 0-0 22. Bh3 Re8 23. Nxd5 Bd8 24. Nf4 Qb7 25. Bg2 Qb8 26. Qa4 Bc8 27. Qc6 Be7 28. d5 exd5 29. Nxd5 Bc5 30. b4 Bf8 31. Bh3 Rd8 32. e6 fxe6 33. Qxe6+ Kh8 34. Ne7 Bxe7 35. Qxe7 Bb7 36. Bxd7 Qa8 37. Ne5 Bd5 38. a3 a5 39. Qxd8+ Qxd8 40. Rc8 1-0

[Event "Bogota McGregor op 3rd"]
[Site "Bogota"]
[Date "2012.12.14"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Gomez, Manuela"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1950"]
[PlyCount "45"]
[EventDate "2012.12.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nc6 3. c4 Nf6 4. Nc3 Bf5 5. Qb3 Rb8 6. cxd5 e6 7. dxc6 bxc6 8. Qa4 Rb6 9. e3 Qb8 10. Ne5 Qb7 11. Nxc6 Nd7 12. Ne5 c6 13. Nxd7 Qxd7 14. Be2 Bd6 15. 0-0 0-0 16. d5 Rc8 17. dxe6 Bxe6 18. Rd1 Rb4 19. Qxb4 Bxb4 20. Rxd7 Bxd7 21. Bd2 Bd6 22. Rc1 Kf8 23. Ne4 1-0

[Event "Bogota McGregor op 3rd"]
[Site "Bogota"]
[Date "2012.12.13"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Narvaez Ramirez, Faber Alberto"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1950"]
[BlackElo "2156"]
[PlyCount "80"]
[EventDate "2012.12.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c6 3. c4 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. a4 Bb4 7. Qc2 Nbd7 8. e3 b5 9. Be2 Bb7 10. 0-0 a6 11. e4 Bxc3 12. bxc3 Qc7 13. Rfb1 0-0 14. e5 Nd5 15. Bh4 h6 16. Bg3 Rfb8 17. Nd2 c5 18. Bf3 Bc6 19. Ne4 cxd4 20. cxd4 Qb6 21. Qd2 Ne7 22. Nd6 Bxf3 23. gxf3 Qc6 24. Qf4 Rf8 25. axb5 axb5 26. Rxa8 Qxa8 27. Rxb5 Nd5 28. Qc1 c3 29. Qc2 Rb8 30. Kg2 Rxb5 31. Nxb5 Qc6 32. Na3 Nb8 33. Qb3 Na6 34. Nc2 g5 35. Kf1 Nab4 36. Nxb4 Nxb4 37. d5 exd5 38. e6 c2 39. exf7+ Kxf7 40. Qxb4 Qc4+ 0-1

[Event "Bogota McGregor op 3rd"]
[Site "Bogota"]
[Date "2012.12.12"]
[Round "2"]
[White "Aguirre Reyes, Jorge Alberto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D53"]
[BlackElo "1950"]
[PlyCount "72"]
[EventDate "2012.12.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2014"]
[Source "ChessBase"]
[SourceDate "2013.11.20"]
[SourceVersion "1"]
[SourceVersionDate "2013.11.20"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. 0-0 a6 11. Re1 0-0 12. Rc1 Rc8 13. Bxf6 Nxf6 14. a3 c5 15. Be2 Re8 16. dxc5 Bxc5 17. Qxd8 Rexd8 18. Red1 Bb6 19. Nd4 h6 20. Bf3 Bxf3 21. Nxf3 Kf8 22. h3 Ke7 23. Kf1 Nd7 24. Ne4 f5 25. Nc3 Kf6 26. Rd6 Ke7 27. Rcd1 Ba5 28. R6d3 Bc7 29. g3 Nb6 30. Nd4 Rd6 31. Ke2 Nc4 32. Rb1 Rcd8 33. Na2 Kf6 34. Nb4 g5 35. f4 Bb6 36. Nbc6 R8d7 0-1

[Event "Bogota Univ Central op-A 5th"]
[Site "Bogota"]
[Date "2011.10.17"]
[Round "8.1"]
[White "Miguel, Mejia"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "2111"]
[BlackElo "1966"]
[PlyCount "8"]
[EventDate "2011.10.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e6 2. b3 Bc5 3. d4 Bb6 4. d5 Qf6 0-1

[Event "Bogota Univ Central op-A 5th"]
[Site "Bogota"]
[Date "2011.10.17"]
[Round "9.1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Jimenez, Leonardo Andres"]
[Result "1-0"]
[ECO "D40"]
[WhiteElo "1966"]
[BlackElo "1849"]
[PlyCount "39"]
[EventDate "2011.10.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c5 5. e3 Nc6 6. Bd3 Be7 7. 0-0 0-0 8. Re1 cxd4 9. exd4 dxc4 10. Bxc4 Qb6 11. a3 Rd8 12. Be3 Ng4 13. d5 Nxe3 14. Rxe3 exd5 15. Nxd5 Qc5 16. Nxe7+ Qxe7 17. Rxe7 Rxd1+ 18. Rxd1 Be6 19. Rxe6 fxe6 20. Bxe6+ 1-0

[Event "Bogota Univ Central op-A 5th"]
[Site "Bogota"]
[Date "2011.10.14"]
[Round "2.1"]
[White "Garzon, Laura Viviana"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C13"]
[WhiteElo "1649"]
[BlackElo "1966"]
[PlyCount "44"]
[EventDate "2011.10.13"]
[EventType "swiss"]
[EventRounds "9"]
[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 dxe4 5. Nxe4 Be7 6. Nxf6+ Bxf6 7. Bxf6 Qxf6 8. Nf3 0-0 9. Bd3 c5 10. c3 cxd4 11. Nxd4 Bd7 12. Qc2 h6 13. 0-0 a6 14. Be4 e5 15. Nf5 Bc6 16. Rad1 Bxe4 17. Qxe4 Nc6 18. Rd7 Rab8 19. Qg4 Rfd8 20. Rfd1 Rxd7 21. Rxd7 Rd8 22. Rxb7 Qxf5 0-1

[Event "Bogota Univ Central op-A 5th"]
[Site "Bogota"]
[Date "2011.10.14"]
[Round "3.1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Martinez, Cristian"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "1966"]
[BlackElo "2234"]
[PlyCount "54"]
[EventDate "2011.10.13"]
[EventType "swiss"]
[EventRounds "9"]
[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. Be2 c5 6. d5 Na6 7. Nf3 Nc7 8. 0-0 0-0 9. Rb1 Bd7 10. Qc2 Rb8 11. b4 cxb4 12. Rxb4 Na6 13. Rb1 Nc5 14. Be3 Qa5 15. Bd4 Rfc8 16. e5 Ne8 17. exd6 Bf5 18. Qb2 Bxb1 19. Bxg7 Nxg7 20. Rxb1 exd6 21. Nd4 a6 22. Nc6 bxc6 23. Qxb8 Rxb8 24. Rxb8+ Ne8 25. Rxe8+ Kg7 26. dxc6 Qxc3 27. c7 Qe1+ 0-1

[Event "Bogota Univ Central op-A 5th"]
[Site "Bogota"]
[Date "2011.10.13"]
[Round "1.1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Barrientos Chavarriaga, Sergio E"]
[Result "0-1"]
[ECO "E52"]
[WhiteElo "1966"]
[BlackElo "2507"]
[PlyCount "70"]
[EventDate "2011.10.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Bb7 6. Bd3 0-0 7. 0-0 d5 8. Re1 Nbd7 9. a3 Bxc3 10. bxc3 Re8 11. cxd5 exd5 12. a4 c5 13. Ba3 Qc7 14. Bb1 Ne4 15. Qc2 Rac8 16. Ra2 Ba6 17. Rb2 Qc6 18. Rc1 Qf6 19. Qd1 Rc7 20. Rbc2 Qc6 21. Ra2 h6 22. h3 Rec8 23. Bc2 Qf6 24. Bxe4 dxe4 25. Ne1 Qg6 26. Rd2 Kh7 27. a5 bxa5 28. Qa4 Nb6 29. Qd1 cxd4 30. cxd4 Rxc1 31. Bxc1 Nd5 32. Bb2 f5 33. Qa4 f4 34. exf4 Nxf4 35. Qd7 Rf8 0-1

[Event "Bogota Mayores Distrital op"]
[Site "Bogota"]
[Date "2011.08.14"]
[Round "7"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Ruiz, Melissa"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "1981"]
[BlackElo "1958"]
[PlyCount "39"]
[EventDate "2011.08.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 c6 4. e4 d5 5. e5 Nfd7 6. cxd5 cxd5 7. Bd3 Nc6 8. Nf3 Be7 9. 0-0 a6 10. Be3 0-0 11. Rc1 f6 12. exf6 Nxf6 13. a3 Bd7 14. Bb1 Bd6 15. Qd3 Ne7 16. Ng5 Ng6 17. Nxh7 Nxh7 18. Qxg6 Qh4 19. g3 Qh3 20. Rfe1 1-0

[Event "Bogota Mayores Distrital op"]
[Site "Bogota"]
[Date "2011.08.13"]
[Round "4"]
[White "Ruiz Castillo, Joshua Daniel"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2148"]
[BlackElo "1981"]
[PlyCount "41"]
[EventDate "2011.08.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 e6 2. Qe2 Nc6 3. c3 e5 4. d3 d5 5. Qc2 Nf6 6. Be2 Be7 7. Nf3 Bg4 8. h3 Bh5 9. 0-0 h6 10. Nh4 Bxe2 11. Qxe2 Nxe4 12. Nf5 Nd6 13. Nxg7+ Kf8 14. Nh5 f5 15. Qf3 d4 16. Qg3 Ke8 17. c4 f4 18. Qg6+ Kd7 19. Qg4+ Ke8 20. c5 Nf7 21. Ng7+ 1-0

[Event "Bogota Mayores Distrital op"]
[Site "Bogota"]
[Date "2011.08.12"]
[Round "2"]
[White "Gomez, Alfredo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C02"]
[BlackElo "1981"]
[PlyCount "8"]
[EventDate "2011.08.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 0-1

[Event "Bogota Mayores Distrital op"]
[Site "Bogota"]
[Date "2011.08.12"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Ribero, Guillermo Andres"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1981"]
[PlyCount "57"]
[EventDate "2011.08.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 Re8 7. 0-0 Nbd7 8. Bg5 h6 9. Bf4 e5 10. dxe5 dxe5 11. Nxe5 Nxe4 12. Nxe4 Nxe5 13. Qxd8 Rxd8 14. Rad1 Be6 15. b3 g5 16. Bg3 b6 17. f4 gxf4 18. Bxf4 c5 19. h3 Ng6 20. Bg3 f5 21. Bh5 Nf8 22. Nd6 Bd4+ 23. Kh2 Kh7 24. Nxf5 Ng6 25. Nxd4 Rxd4 26. Rxd4 cxd4 27. Rf6 Nf8 28. Bf4 Rd8 29. Bxh6 1-0

[Event "Bogota Mayores Distrital op"]
[Site "Bogota"]
[Date "2011.08.11"]
[Round "1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Tapia, Daniel"]
[Result "0-1"]
[ECO "D55"]
[WhiteElo "1981"]
[BlackElo "2302"]
[PlyCount "70"]
[EventDate "2011.08.11"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bg5 0-0 6. e3 h6 7. Bxf6 Bxf6 8. Qb3 c6 9. Rc1 Nd7 10. Bd3 dxc4 11. Bxc4 e5 12. 0-0 exd4 13. exd4 Nb6 14. Ne4 Nxc4 15. Nxf6+ Qxf6 16. Qxc4 Be6 17. Qb4 Bd5 18. Ne5 Qg5 19. f3 f6 20. Ng4 h5 21. h4 Qxh4 22. Ne3 a5 23. Qb6 Rae8 24. Nxd5 cxd5 25. Rc7 Re2 26. Qxb7 Qxd4+ 27. Kh1 Qh4+ 28. Kg1 Qd4+ 29. Kh1 Qh4+ 30. Kg1 Qg5 31. Rf2 Rfe8 32. Rxe2 Rxe2 33. Qc8+ Kh7 34. Qh3 Re1+ 35. Kh2 Qe5+ 0-1

[Event "Bogota Mayores Distrital op 07"]
[Site "Bogota"]
[Date "2011.07.22"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Gaviria Bermudez, Alejandro"]
[Result "0-1"]
[ECO "C10"]
[WhiteElo "1981"]
[PlyCount "68"]
[EventDate "2011.07.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. Bd3 Be7 8. 0-0 0-0 9. c3 b6 10. Qc2 Bb7 11. Ne5 c5 12. Be3 cxd4 13. Bxd4 Rc8 14. Rad1 Qd5 15. Nf3 Qh5 16. Be2 Be4 17. Qa4 Nd5 18. Bxg7 Kxg7 19. Qxe4 Bd6 20. h3 Rfd8 21. Nd4 Qh6 22. Ba6 Rc5 23. Nb3 Rc7 24. Nd4 Rc5 25. Nb5 Bb8 26. Qd4+ e5 27. Qg4+ Kh8 28. c4 Rg8 29. Qf5 Nf4 30. g3 Qc6 31. f3 Rxg3+ 32. Kh2 Rxh3+ 33. Kg1 Rg3+ 34. Kh2 Qh6+ 0-1

[Event "Bogota Mayores Distrital op 07"]
[Site "Bogota"]
[Date "2011.07.20"]
[Round "1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Barajas, Ivan"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1981"]
[PlyCount "46"]
[EventDate "2011.07.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 c6 5. Bg5 Nbd7 6. e3 Be7 7. Qc2 Qc7 8. Rc1 a6 9. a3 dxc4 10. Bxc4 b5 11. Ba2 Bb7 12. b4 Rc8 13. 0-0 c5 14. bxc5 h6 15. Bh4 Bxf3 16. gxf3 Qc6 17. Kg2 g5 18. Bg3 h5 19. h3 g4 20. hxg4 h4 21. Rh1 Nxg4 22. d5 exd5 23. Bxd5 Qxc5 1-0

[Event "Bogota Mayores Distrital op 07"]
[Site "Bogota"]
[Date "2011.07.20"]
[Round "2"]
[White "Ruiz Aguilar, Pablo Alexander"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B84"]
[WhiteElo "2277"]
[BlackElo "1981"]
[PlyCount "59"]
[EventDate "2011.07.20"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2012"]
[Source "ChessBase"]
[SourceDate "2011.11.24"]
[SourceVersion "1"]
[SourceVersionDate "2011.11.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6 7. 0-0 Be7 8. Kh1 Qc7 9. f4 Nbd7 10. Bf3 0-0 11. a4 Rb8 12. a5 b6 13. e5 dxe5 14. Nc6 Bd6 15. Nxb8 Qxb8 16. axb6 Nxb6 17. fxe5 Bxe5 18. Ne4 Nbd5 19. c4 Nxe4 20. Bxe4 Nf6 21. Bc2 Bb7 22. Ra3 Rd8 23. Qe2 Bxh2 24. Rxf6 gxf6 25. Rh3 Bf4 26. Qg4+ Bg5 27. Bxg5 fxg5 28. Qxg5+ Kf8 29. Rxh7 Ke8 30. Ba4+ 1-0

[Event "Bogota Mayores Distrital op 04"]
[Site "Bogota"]
[Date "2011.04.17"]
[Round "7.25"]
[White "Rosero, Hugo Alberto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B84"]
[WhiteElo "1525"]
[BlackElo "1995"]
[PlyCount "68"]
[EventDate "2011.04.14"]
[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. Be2 e6 7. Be3 Be7 8. 0-0 0-0 9. Qd2 b5 10. a3 Bb7 11. f3 Nc6 12. Nxc6 Bxc6 13. Rad1 Qc7 14. Bd3 Rfd8 15. Qf2 Nd7 16. f4 Rac8 17. f5 exf5 18. Qxf5 Bf6 19. e5 dxe5 20. Qxh7+ Kf8 21. Bf5 Bb7 22. Nd5 Bxd5 23. Rxd5 Ke7 24. Rfd1 Nb6 25. Bxb6 Qxb6+ 26. Kh1 Rxd5 27. Rxd5 Rd8 28. Rxd8 Qxd8 29. Bd3 g6 30. Qh3 Qd4 31. c3 Qf2 32. Qf3 Qxb2 33. Qb7+ Kf8 34. h3 Qxa3 0-1

[Event "Bogota Mayores Distrital op 04"]
[Site "Bogota"]
[Date "2011.04.16"]
[Round "5.18"]
[White "Leal Cortes, Diego Fernando"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1850"]
[BlackElo "1995"]
[PlyCount "75"]
[EventDate "2011.04.14"]
[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 e6 4. d4 cxd4 5. cxd4 Nf6 6. Nc3 Be7 7. Bd3 0-0 8. 0-0 Nc6 9. Bf4 Qb6 10. d5 Ne5 11. Nxe5 dxe5 12. Bxe5 Rd8 13. Na4 Qa5 14. Rc1 Bd7 15. Nc3 Rac8 16. Re1 Qb6 17. Bxf6 Bxf6 18. e5 Bg5 19. Qh5 h6 20. Rb1 exd5 21. Nxd5 Qa5 22. Be4 Bc6 23. Nc3 Rd2 24. h4 Qb6 25. Rf1 Be3 26. Qf5 Rcd8 27. fxe3 Qxe3+ 28. Kh1 Bxe4 29. Nxe4 R2d7 30. Rbe1 Qb6 31. Nd6 f6 32. Qe6+ Kh7 33. Qf5+ Kh8 34. Qg6 Rf8 35. exf6 Rg8 36. fxg7+ Rdxg7 37. Qxh6+ Rh7 38. Nf7# 1-0

[Event "Bogota Mayores Distrital op 04"]
[Site "Bogota"]
[Date "2011.04.15"]
[Round "2.2"]
[White "Becerra, Juan David"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2258"]
[BlackElo "1995"]
[PlyCount "75"]
[EventDate "2011.04.14"]
[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. Nc3 a6 3. f4 e6 4. a4 d5 5. Nf3 d4 6. Nb1 Nf6 7. d3 Nc6 8. g3 Be7 9. Na3 Qc7 10. Bg2 Nd7 11. Nc4 Nb6 12. Ncd2 e5 13. a5 Nd7 14. Nc4 0-0 15. 0-0 f6 16. f5 b5 17. axb6 Nxb6 18. Nxb6 Qxb6 19. g4 Bd7 20. h4 h6 21. Kh2 Qd8 22. Kg3 Kh7 23. b3 g5 24. Rh1 Kg7 25. Rh3 Rh8 26. Qh1 Nb4 27. Ne1 Qb6 28. Bd2 Nxc2 29. Nxc2 Qxb3 30. Ne1 c4 31. Nf3 Qxd3 32. Qh2 c3 33. hxg5 hxg5 34. Rh1 Rxh3+ 35. Qxh3 Rg8 36. Bf1 Qxe4 37. Bc4 Kf8 38. Qh7 1-0

[Event "Bogota Mayores Distrital op 04"]
[Site "Bogota"]
[Date "2011.04.15"]
[Round "3.17"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Villegas, Jeisson Steven"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "1995"]
[BlackElo "1703"]
[PlyCount "66"]
[EventDate "2011.04.14"]
[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. Qf3 Qc7 9. 0-0-0 Nbd7 10. Bd3 0-0 11. Rhe1 Nc5 12. Kb1 Nxd3 13. Rxd3 b5 14. g4 Bb7 15. Bxf6 Bxf6 16. g5 Bxd4 17. Rxd4 Rac8 18. Rd2 b4 19. Ne2 d5 20. exd5 Bxd5 21. Qe3 a5 22. h4 a4 23. h5 b3 24. cxb3 axb3 25. a3 Qb7 26. Nc3 Rfd8 27. f5 Bc4 28. g6 Rxd2 29. gxf7+ Qxf7 30. Qxd2 exf5 31. h6 g6 32. Qd6 Re8 33. Rc1 Qe7 1/2-1/2

[Event "Bogota Mayores Distrital op 04"]
[Site "Bogota"]
[Date "2011.04.14"]
[Round "1.27"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Sandoval, Edilson"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1995"]
[PlyCount "18"]
[EventDate "2011.04.14"]
[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 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. 0-0 d6 6. h3 Be6 7. Bb3 Bxb3 8. axb3 0-0 9. d3 h6 1-0

[Event "Bogota Mayores Distrital op 03"]
[Site "Bogota"]
[Date "2011.03.20"]
[Round "5.4"]
[White "Narvaez Ramirez, Faber Alberto"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1/2-1/2"]
[ECO "B94"]
[WhiteElo "2167"]
[BlackElo "1995"]
[PlyCount "60"]
[EventDate "2011.03.18"]
[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 Qc7 7. Qf3 Nbd7 8. 0-0-0 h6 9. Bh4 b5 10. Nd5 Nxd5 11. exd5 Ne5 12. Qe3 g5 13. Bg3 Bg7 14. h4 Rf8 15. hxg5 hxg5 16. Be2 f5 17. Bh5+ Kd8 18. Qe2 f4 19. Bh2 Bd7 20. f3 Qa5 21. Kb1 Rc8 22. Bg1 Nc4 23. Nb3 Qc7 24. Bd4 Bxd4 25. Nxd4 Ne3 26. Bg4 Nxg4 27. fxg4 Qc4 28. Qe4 Bxg4 29. Rde1 Re8 30. Nc6+ Kc7 1/2-1/2

[Event "Bogota Mayores Distrital op 03"]
[Site "Bogota"]
[Date "2011.03.19"]
[Round "3.8"]
[White "Nieto, Manuel Valerio Wald"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C46"]
[WhiteElo "1840"]
[BlackElo "1995"]
[PlyCount "17"]
[EventDate "2011.03.18"]
[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 e5 2. Nf3 Nc6 3. d3 Bc5 4. Nc3 f5 5. Ne2 d6 6. a4 a6 7. b4 Bb6 8. c3 Nf6 9. Qc2 0-1

[Event "Bogota Mayores Distrital op 03"]
[Site "Bogota"]
[Date "2011.03.19"]
[Round "2.8"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Pena, Fernando"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1995"]
[BlackElo "2058"]
[PlyCount "52"]
[EventDate "2011.03.18"]
[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. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qd2 Qc7 10. g4 h6 11. 0-0-0 Nbd7 12. Kb1 Nc5 13. Nxc5 dxc5 14. Nd5 Nxd5 15. exd5 Bxd5 16. Be2 0-0-0 17. Qc3 Kb8 18. Rhe1 f6 19. Bf2 Qc6 20. Bg3 Ka8 21. Rd3 Rd7 22. Qa5 Rhd8 23. Bf2 Bc4 24. Rxd7 Qxd7 25. Bxc5 Bxc5 26. Qxc5 Bxe2 0-1

[Event "Bogota Mayores Distrital op 03"]
[Site "Bogota"]
[Date "2011.03.18"]
[Round "1.18"]
[White "Morales, Luis Eduardo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1954"]
[BlackElo "1995"]
[PlyCount "17"]
[EventDate "2011.03.18"]
[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. c3 d6 3. d4 cxd4 4. cxd4 Nf6 5. Nc3 e6 6. Be2 Be7 7. Nf3 0-0 8. 0-0 Nc6 9. Be3 0-1

[Event "Bogota Distrital op"]
[Site "Bogota"]
[Date "2011.02.05"]
[Round "4"]
[White "Cano, Carlos"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "D10"]
[BlackElo "1993"]
[PlyCount "44"]
[EventDate "2011.02.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 140 Extra"]
[Source "ChessBase"]
[SourceDate "2011.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2011.03.01"]
[SourceQuality "1"]

1. c4 c6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Nbd7 5. Rc1 e6 6. Nf3 Qa5 7. Bxf6 Nxf6 8. cxd5 exd5 9. a3 Bd6 10. e3 0-0 11. Bd3 Re8 12. h3 Be6 13. Ng5 Bd7 14. Qc2 h6 15. Nf3 Ne4 16. 0-0 f5 17. Rfe1 Re6 18. Ne2 Qc7 19. Nh4 Rf8 20. Bxe4 fxe4 21. g3 Ref6 22. Rf1 Bxh3 0-1

[Event "Bogota Distrital op"]
[Site "Bogota"]
[Date "2011.02.05"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Quijano, Santiago"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "1993"]
[PlyCount "48"]
[EventDate "2011.02.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 140 Extra"]
[Source "ChessBase"]
[SourceDate "2011.03.01"]
[SourceVersion "1"]
[SourceVersionDate "2011.03.01"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. f3 a6 7. Be3 b5 8. Qd2 Bb7 9. Nxc6 Bxc6 10. g4 e6 11. h4 Be7 12. h5 b4 13. Ne2 Nd7 14. Nd4 Bb7 15. 0-0-0 Ne5 16. Qxb4 Qd7 17. Be2 0-0 18. f4 Nc6 19. Nxc6 Bxc6 20. Qd4 Rfb8 21. g5 Qb7 22. h6 f6 23. Bc4 Bd7 24. f5 Qc8 1-0

[Event "Bogota McGregor op 1st"]
[Site "Bogota"]
[Date "2010.12.08"]
[Round "9"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Guerrero Munoz, Hector Fabio"]
[Result "1-0"]
[ECO "D64"]
[WhiteElo "1994"]
[PlyCount "31"]
[EventDate "2010.12.03"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 139 Extra"]
[Source "ChessBase"]
[SourceDate "2011.01.05"]
[SourceVersion "1"]
[SourceVersionDate "2011.01.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Bg5 Be7 5. Nc3 c6 6. e3 Nbd7 7. Rc1 a6 8. Qc2 0-0 9. a3 dxc4 10. Bxc4 b5 11. Bd3 Bb7 12. Ne4 h6 13. Bh4 Rc8 14. Nc5 Nxc5 15. dxc5 Ng4 16. Bf6 1-0

[Event "Bogota McGregor op 1st"]
[Site "Bogota"]
[Date "2010.12.07"]
[Round "8"]
[White "Pineda Arevalo, Jose Ariel"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D47"]
[BlackElo "1994"]
[PlyCount "53"]
[EventDate "2010.12.03"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 139 Extra"]
[Source "ChessBase"]
[SourceDate "2011.01.05"]
[SourceVersion "1"]
[SourceVersionDate "2011.01.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 Nbd7 5. e3 e6 6. Be2 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. 0-0 Bd6 10. e4 e5 11. Bg5 0-0 12. Rc1 h6 13. Bh4 a6 14. Re1 Re8 15. a3 Rc8 16. b4 exd4 17. Nxd4 Be5 18. Nf5 Qb6 19. Bg3 Rcd8 20. Qf3 Bxg3 21. Qxg3 Nh5 22. Nxh6+ Kh7 23. Qg5 Ndf6 24. e5+ Rxd3 25. exf6 Rxe1+ 26. Rxe1 Qd4 27. Nf5 1-0

[Event "Bogota McGregor op 1st"]
[Site "Bogota"]
[Date "2010.12.06"]
[Round "6"]
[White "Romero Mora, Elvert"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D52"]
[BlackElo "1994"]
[PlyCount "29"]
[EventDate "2010.12.03"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 139 Extra"]
[Source "ChessBase"]
[SourceDate "2011.01.05"]
[SourceVersion "1"]
[SourceVersionDate "2011.01.05"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. Rc1 Ne4 8. a3 dxc4 9. Bf4 Bxa3 10. bxa3 Nxc3 11. Qd2 b5 12. Bd6 Nf6 13. Bb4 Nce4 14. Bxa5 Nxd2 15. Nxd2 1-0

[Event "Bogota McGregor op 1st"]
[Site "Bogota"]
[Date "2010.12.05"]
[Round "5"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Correa, Flavio"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "1994"]
[PlyCount "21"]
[EventDate "2010.12.03"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 139 Extra"]
[Source "ChessBase"]
[SourceDate "2011.01.05"]
[SourceVersion "1"]
[SourceVersionDate "2011.01.05"]
[SourceQuality "1"]

1. e4 d6 2. f4 g6 3. Nf3 Bg7 4. Bc4 Nf6 5. Nc3 a6 6. 0-0 b5 7. Bb3 c5 8. d3 0-0 9. a3 Nc6 10. Nd5 Bg4 11. c3 1-0

[Event "Bogota McGregor op 1st"]
[Site "Bogota"]
[Date "2010.12.04"]
[Round "4"]
[White "Enriquez Z, Juan Camilo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B55"]
[BlackElo "1994"]
[PlyCount "20"]
[EventDate "2010.12.03"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "COL"]
[SourceTitle "CBM 139 Extra"]
[Source "ChessBase"]
[SourceDate "2011.01.05"]
[SourceVersion "1"]
[SourceVersionDate "2011.01.05"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 e5 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. Nb3 Qb6 9. Qe2 d5 10. Be3 d4 0-1

[Event "COL-chT"]
[Site "Bogota"]
[Date "2010.10.18"]
[Round "7.6"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Prado Segura, Robinson Alexander"]
[Result "1-0"]
[ECO "A60"]
[WhiteElo "1995"]
[PlyCount "28"]
[EventDate "2010.10.15"]
[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 c5 2. d5 e6 3. c4 exd5 4. cxd5 d6 5. Nc3 Nf6 6. Nf3 a6 7. e4 Be7 8. Bd3 b5 9. 0-0 0-0 10. Bg5 Nbd7 11. Rc1 Bb7 12. a3 Qc7 13. Re1 Rfe8 14. Qc2 Rac8 1-0

[Event "COL-chT"]
[Site "Bogota"]
[Date "2010.10.17"]
[Round "6.7"]
[White "Herrera Rincon, Wilene"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B91"]
[WhiteElo "1699"]
[BlackElo "1995"]
[PlyCount "70"]
[EventDate "2010.10.15"]
[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. g3 g6 7. Bg2 e5 8. Nb3 Be6 9. 0-0 Nbd7 10. Bg5 h6 11. Be3 Be7 12. f3 Nb6 13. Qd3 Bc4 14. Qd2 Bxf1 15. Bxf1 g5 16. a4 Rc8 17. Na5 Qc7 18. Rd1 Nfd7 19. Kh1 Nc5 20. b3 Ne6 21. Nc4 Nxc4 22. Bxc4 Qa5 23. Kg2 Qb4 24. h3 0-0 25. Qe1 Kg7 26. Bd2 Qc5 27. Nd5 Bd8 28. Bb4 Qc6 29. Qf2 b5 30. axb5 axb5 31. Bd3 Nd4 32. Ne3 Bb6 33. Rc1 Kh8 34. Bd2 f5 35. Qe1 Nxf3 0-1

[Event "COL-chT"]
[Site "Bogota"]
[Date "2010.10.17"]
[Round "5.9"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Moreno Carnero, Javier"]
[Result "1-0"]
[ECO "C60"]
[WhiteElo "1995"]
[BlackElo "2519"]
[PlyCount "31"]
[EventDate "2010.10.15"]
[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 e5 2. Nf3 Nc6 3. Bb5 h6 4. 0-0 Bc5 5. Bxc6 dxc6 6. Nxe5 Nf6 7. d3 Qe7 8. Bf4 g5 9. Bg3 g4 10. d4 Bb6 11. c4 a6 12. c5 Ba7 13. Nc3 h5 14. Bh4 Qe6 15. Qd2 Nd7 16. Qg5 1-0

[Event "COL-chT"]
[Site "Bogota"]
[Date "2010.10.16"]
[Round "4.10"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Poveda, Julio Cesar"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1995"]
[BlackElo "1600"]
[PlyCount "51"]
[EventDate "2010.10.15"]
[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 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. Bg5 e6 6. Nf3 Be7 7. 0-0 Nc6 8. c3 0-0 9. Nbd2 Nd7 10. Bxe7 Nxe7 11. Re1 Nf6 12. Qb3 Ng6 13. Rad1 b6 14. Nf1 Nf4 15. Bb1 Ba6 16. Ne5 N6h5 17. Qc2 g6 18. Nf3 Bb5 19. g3 Nh3+ 20. Kg2 Ng5 21. Nxg5 Qxg5 22. Re5 f5 23. h4 Qf6 24. Rde1 Rae8 25. Ne3 f4 26. Ng4 0-1

[Event "Bogota Torneo Distrital op"]
[Site "Bogota"]
[Date "2010.05.17"]
[Round "6.6"]
[White "Perez Olarte, Cesar Camilo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2179"]
[BlackElo "1964"]
[PlyCount "71"]
[EventDate "2010.05.14"]
[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 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. d4 d6 8. c3 Bg4 9. Be3 Na5 10. Bc2 Nc4 11. Bc1 0-0 12. b3 Nb6 13. Nbd2 Re8 14. Re1 c5 15. d5 Rc8 16. Nf1 Nbd7 17. h3 Bh5 18. Ng3 Bg6 19. a4 c4 20. b4 Nh5 21. Nxh5 Bxh5 22. Qe2 h6 23. Kh2 Bg5 24. Be3 Rf8 25. g4 Bxe3 26. Qxe3 Bg6 27. Rg1 f6 28. Nh4 Bh7 29. Nf5 Bxf5 30. gxf5 Kh8 31. axb5 axb5 32. Ra6 Qe7 33. Rga1 Rc7 34. R1a5 Rb8 35. Bd1 Nf8 36. Rb6 1-0

[Event "Bogota Torneo Distrital op"]
[Site "Bogota"]
[Date "2010.05.15"]
[Round "2.3"]
[White "Cifuentes, John Jairo"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2168"]
[BlackElo "1964"]
[PlyCount "40"]
[EventDate "2010.05.14"]
[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. d4 cxd4 3. c3 dxc3 4. Nxc3 e6 5. Nf3 Be7 6. Bc4 a6 7. a4 d6 8. 0-0 Nf6 9. Qe2 0-0 10. Rd1 Qc7 11. Bf4 Nc6 12. e5 dxe5 13. Nxe5 Bd6 14. Rxd6 Qxd6 15. Ng6 e5 16. Rd1 Nd4 17. Rxd4 Qxd4 18. Bxe5 Qg4 19. Nxf8 Qxe2 20. Nxe2 Kxf8 0-1

[Event "Bogota Torneo Distrital op"]
[Site "Bogota"]
[Date "2010.05.14"]
[Round "1.15"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Rodriguez Beltran, Yeisson"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1964"]
[BlackElo "1600"]
[PlyCount "48"]
[EventDate "2010.05.14"]
[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 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Bd2 Nbd7 7. Be2 c6 8. 0-0 e6 9. a3 Qc7 10. Re1 Bd6 11. h3 h6 12. Be3 0-0 13. Bd3 Bxd3 14. Qxd3 Nd5 15. Ne4 Nxe3 16. Qxe3 Bf4 17. Qd3 Rad8 18. Rad1 c5 19. g3 Bd6 20. dxc5 Bxc5 21. Nxc5 Nxc5 22. Qc4 Rxd1 23. Rxd1 Rc8 24. c3 a6 1-0

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.04.03"]
[Round "7"]
[White "Paniagua, David"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "1820"]
[BlackElo "1974"]
[PlyCount "93"]
[EventDate "2010.03.31"]
[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 c5 2. d3 d5 3. Nbd2 Nc6 4. g3 Nf6 5. Bg2 e5 6. e4 dxe4 7. dxe4 Be6 8. c3 Be7 9. Qe2 0-0 10. Ng5 Bg4 11. f3 Bd7 12. Nc4 b5 13. Ne3 a6 14. Nf5 Bxf5 15. exf5 Qc7 16. Ne4 Rad8 17. Be3 Nxe4 18. fxe4 c4 19. 0-0 Rd3 20. Rad1 Rfd8 21. Rxd3 Rxd3 22. Rd1 Rxd1+ 23. Qxd1 Qd6 24. Qxd6 Bxd6 25. Bf1 Kf8 26. b3 cxb3 27. axb3 Na5 28. b4 Nc4 29. Bxc4 bxc4 30. Kf2 Ke7 31. g4 Kd7 32. h4 Be7 33. g5 Bd8 34. Ke2 Kc6 35. Bc5 a5 36. Bf8 g6 37. bxa5 Bxa5 38. Kd2 Bb6 39. Bg7 gxf5 40. exf5 Kd5 41. h5 e4 42. g6 fxg6 43. fxg6 e3+ 44. Ke2 h6 45. Bxh6 Ke6 46. Bxe3 Bc7 47. Bd4 1-0

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.04.02"]
[Round "2"]
[White "Garcia Alarcon, Alvaro"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "D51"]
[WhiteElo "2210"]
[BlackElo "1974"]
[PlyCount "57"]
[EventDate "2010.03.31"]
[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. Nf3 Nf6 4. cxd5 cxd5 5. Nc3 e6 6. Bg5 Nbd7 7. e3 Qa5 8. Qb3 Ne4 9. Bf4 Be7 10. Bd3 0-0 11. Bxe4 dxe4 12. Nd2 Nf6 13. 0-0 Nd5 14. Ndxe4 Nxf4 15. exf4 b6 16. Qb5 Qxb5 17. Nxb5 Bb7 18. Nbc3 Rfd8 19. Rfd1 Rd7 20. Rd2 Rad8 21. Rad1 Bb4 22. a3 Bf8 23. f3 g6 24. Nf6+ Kg7 25. Nxd7 Rxd7 26. Ne4 a6 27. Kf2 f5 28. Ng3 Bd6 29. Ne2 1-0

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.04.02"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Gutierrez Herrera, Jose Antonio"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1974"]
[BlackElo "2211"]
[PlyCount "54"]
[EventDate "2010.03.31"]
[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 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 c5 5. d5 d6 6. e4 0-0 7. Be2 b5 8. cxb5 a6 9. b6 Nbd7 10. h3 Qxb6 11. 0-0 a5 12. Nd2 Ba6 13. Bxa6 Qxa6 14. f4 Nb6 15. a4 Qd3 16. Rf3 Qa6 17. Ra3 Nfd7 18. g4 c4 19. Qf1 Nc5 20. h4 Nd3 21. Nb5 Nxa4 22. Rxa4 Qxb5 23. Rxc4 Nxc1 24. Rxc1 Qxb2 25. Nc4 Qd4+ 26. Kh2 Rfc8 27. Nxa5 Qd2+ 0-1

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.04.02"]
[Round "5"]
[White "Ramirez, Francisco Javier"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "1973"]
[BlackElo "1974"]
[PlyCount "95"]
[EventDate "2010.03.31"]
[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. a4 e5 7. Nb3 Be6 8. Bg5 Be7 9. Bxf6 Bxf6 10. Nd5 Bxd5 11. Qxd5 Nc6 12. Rd1 Be7 13. Bc4 0-0 14. 0-0 Qc7 15. Qd2 Rac8 16. Bd5 h6 17. f4 exf4 18. Qxf4 Ne5 19. Nd4 Qb6 20. b3 Rxc2 21. Kh1 Rc3 22. Qd2 Rd3 23. Qf2 Rxd1 24. Rxd1 Nc6 25. Kg1 Nxd4 26. Qxd4 Qxd4+ 27. Rxd4 b6 28. Rc4 Bf6 29. Kf1 b5 30. axb5 axb5 31. Rc6 Be5 32. h3 Ra8 33. Rc7 Ra1+ 34. Ke2 Ra2+ 35. Kf3 b4 36. Rxf7 Kh7 37. Rb7 Bd4 38. Rxb4 Bc5 39. Rb7 Rb2 40. g4 Kg6 41. h4 Rb1 42. h5+ Kh7 43. Be6 Rf1+ 44. Ke2 Rf8 45. b4 Bd4 46. Kd3 Bf2 47. Rf7 Rxf7 48. Bxf7 1-0

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.04.01"]
[Round "3"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Pacheco, Luis Emilio"]
[Result "1-0"]
[ECO "B82"]
[WhiteElo "1974"]
[BlackElo "1600"]
[PlyCount "35"]
[EventDate "2010.03.31"]
[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 e6 6. Be3 a6 7. f4 e5 8. fxe5 dxe5 9. Nf3 Qxd1+ 10. Rxd1 Nc6 11. Bd3 Bb4 12. 0-0 Bxc3 13. bxc3 Be6 14. Rb1 b5 15. a4 Rb8 16. axb5 axb5 17. Rxb5 Rxb5 18. Bxb5 1-0

[Event "Bogota Torneo Distrital"]
[Site "Bogota"]
[Date "2010.03.31"]
[Round "1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Lopez, Cesar2222"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1974"]
[BlackElo "1600"]
[PlyCount "25"]
[EventDate "2010.03.31"]
[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. Nf3 Bf5 3. c4 e6 4. cxd5 exd5 5. Qb3 Nc6 6. Nc3 Nf6 7. Qxb7 Nb4 8. e4 Nxe4 9. Bb5+ Ke7 10. 0-0 Nxc3 11. bxc3 Rb8 12. Qxa7 Nc2 13. Ne5 1-0

[Event "Bogota IRT op Navideno"]
[Site "Bogota"]
[Date "2009.12.08"]
[Round "9"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Useche Contreras, Maigel"]
[Result "0-1"]
[ECO "B80"]
[WhiteElo "1992"]
[PlyCount "48"]
[EventDate "2009.12.04"]
[EventType "swiss"]
[EventRounds "9"]
[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. f3 e6 7. Be3 b5 8. Qd2 Nfd7 9. f4 Nc5 10. b4 Ncd7 11. Bd3 Be7 12. 0-0 0-0 13. Nce2 Bb7 14. Ng3 Nc6 15. Nxc6 Bxc6 16. a3 Nf6 17. Qe2 d5 18. e5 Ne4 19. Qh5 f5 20. exf6 Bxf6 21. Rad1 Qe7 22. Bc5 Qf7 23. Bxf8 Bd4+ 24. Kh1 Nxg3+ 0-1

[Event "Bogota IRT op Navideno"]
[Site "Bogota"]
[Date "2009.12.04"]
[Round "8"]
[White "Camargo, Santiago"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2050"]
[BlackElo "1992"]
[PlyCount "23"]
[EventDate "2009.12.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 e5 2. g4 c5 3. d4 cxd4 4. Nxd4 Nf6 5. e4 a6 6. Nc3 Be7 7. Nb3 d6 8. f3 Be6 9. Be3 Nbd7 10. g5 Nh5 11. h4 b5 12. Nd5 1-0

[Event "Bogota IRT op Navideno"]
[Site "Bogota"]
[Date "2009.12.04"]
[Round "1"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Lizarralde, Luis Francisco"]
[Result "0-1"]
[ECO "D44"]
[WhiteElo "1992"]
[BlackElo "1600"]
[PlyCount "54"]
[EventDate "2009.12.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 c6 3. c4 e6 4. Nc3 dxc4 5. a4 Bb4 6. Qc2 Nf6 7. Bg5 Nbd7 8. e3 b5 9. Ne5 Bb7 10. Be2 h6 11. Bh4 Nxe5 12. dxe5 g5 13. Rd1 Nd5 14. Bg3 Qa5 15. Rc1 Qxa4 16. Qxa4 bxa4 17. 0-0 a3 18. Nxd5 cxd5 19. bxa3 Bxa3 20. Ra1 Bb2 21. Rab1 c3 22. Bb5+ Ke7 23. f4 Rac8 24. Ba4 Ba6 25. Rf2 Bd3 26. Rbxb2 cxb2 27. Rxb2 Rc1+ 0-1

[Event "Bogota op 4th"]
[Site "Bogota"]
[Date "2009.11.02"]
[Round "9"]
[White "Cuartas, Carlos Enrique"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2281"]
[BlackElo "1992"]
[PlyCount "39"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Bg4 4. d4 cxd4 5. cxd4 e6 6. Nc3 Nf6 7. Be2 Be7 8. Qb3 Qc8 9. Bg5 0-0 10. e5 dxe5 11. dxe5 Nd5 12. Nxd5 Bxg5 13. Nxg5 exd5 14. Qd3 g6 15. 0-0 Nc6 16. f4 Bxe2 17. Qxe2 d4 18. Qe4 Rd8 19. Nf3 Qd7 20. Rfd1 1-0

[Event "Bogota op 4th"]
[Site "Bogota"]
[Date "2009.11.02"]
[Round "8"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Salej, Jorge"]
[Result "1/2-1/2"]
[ECO "D15"]
[WhiteElo "1992"]
[PlyCount "41"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 a6 5. Bg5 dxc4 6. a4 a5 7. e3 Na6 8. Bxc4 Nb4 9. 0-0 e6 10. e4 Be7 11. e5 Nfd5 12. Bxe7 Qxe7 13. Ne4 0-0 14. Nd6 b6 15. Qd2 Ba6 16. Rac1 Bxc4 17. Rxc4 f5 18. Rfc1 Qd7 19. Ne1 b5 20. axb5 cxb5 21. Qe2 1/2-1/2

[Event "Bogota op 4th"]
[Site "Bogota"]
[Date "2009.11.01"]
[Round "6"]
[White "Ramirez, Jaime Orlando"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "1-0"]
[ECO "C88"]
[WhiteElo "2014"]
[BlackElo "1992"]
[PlyCount "63"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 0-0 8. d4 d6 9. d5 Na5 10. Nbd2 Bg4 11. Nf1 Qc8 12. h3 Bh5 13. Ng3 Bg6 14. Nh4 Nd7 15. Nhf5 Bd8 16. Be3 Nf6 17. Qf3 Rb8 18. Rad1 Nxb3 19. cxb3 Qd7 20. Rc1 Rc8 21. Rc6 Ra8 22. Rec1 Ne8 23. b4 Kh8 24. Bd2 Bxf5 25. Nxf5 g6 26. Bh6 Rg8 27. Ng3 Bf6 28. Rxc7 Qd8 29. Rxf7 Bg7 30. Bxg7+ Rxg7 31. Rf8+ Rg8 32. Qf7 1-0

[Event "Bogota op 4th"]
[Site "Bogota"]
[Date "2009.11.01"]
[Round "7"]
[White "Uribe Fajardo, Juan Felipe"]
[Black "Ospina Ortiz, Oscar Alexander"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "1970"]
[BlackElo "1992"]
[PlyCount "68"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 h6 5. c3 Nf6 6. 0-0 d6 7. b4 Bb6 8. a4 a6 9. h3 Be6 10. Bxe6 fxe6 11. Re1 0-0 12. Nbd2 Qe8 13. Nf1 Nh5 14. Be3 Nf4 15. Bxb6 cxb6 16. d4 Qh5 17. Re3 exd4 18. Nxd4 Nxd4 19. Qxh5 Nxh5 20. cxd4 Rac8 21. e5 d5 22. Rd1 Rc4 23. Rb3 Nf4 24. Rb2 Rc3 25. b5 Nd3 26. Rbd2 Nb4 27. bxa6 bxa6 28. Ra1 a5 29. Ne3 Rfc8 30. Rdd1 Nc2 31. Nxc2 Rxc2 32. Rab1 R8c6 33. Rb3 R2c4 34. Ra3 Rb4 0-1

[Event "Bogota op 4th"]
[Site "Bogota"]
[Date "2009.10.31"]
[Round "4"]
[White "Ospina Ortiz, Oscar Alexander"]
[Black "Guerrero Fandino, Gustavo A"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1992"]
[BlackElo "2143"]
[PlyCount "48"]
[EventDate "2009.10.29"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2010"]
[Source "ChessBase"]
[SourceDate "2010.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2010.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Nbd7 9. Qd2 h5 10. Rg1 b5 11. 0-0-0 Nb6 12. Qf2 Nfd7 13. Kb1 Rc8 14. f4 Rxc3 15. bxc3 Na4 16. Qe1 Qc7 17. Bd2 exf4 18. Bxf4 Nxc3+ 19. Kb2 Nxd1+ 20. Qxd1 Be7 21. c3 Nb6 22. Qd4 Bf6 23. Bxd6 Bxd4 24. Bxc7 Bxg1 0-1

