[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.13"]
[Round "7"]
[White "Blandon Villa, Diego F"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2087"]
[BlackElo "1938"]
[PlyCount "46"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. b3 Nc6 4. Bb2 d6 5. d4 cxd4 6. Nxd4 a6 7. Bd3 Nxd4 8. Bxd4 Nf6 9. 0-0 Be7 10. Nd2 0-0 11. f4 e5 12. Bb2 Ng4 13. Qf3 exf4 14. Qe2 d5 15. Nf3 Ne3 16. Rfe1 Bb4 17. c3 Bc5 18. Kh1 Re8 19. e5 Bg4 20. h3 Re6 21. hxg4 Rh6+ 22. Kg1 Nxg4+ 23. Nd4 Rh1+ 0-1

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.12"]
[Round "6"]
[White "Ossa, Juan Sebastian"]
[Black "Bassan, Remo"]
[Result "0-1"]
[ECO "A70"]
[WhiteElo "1938"]
[BlackElo "2286"]
[PlyCount "46"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. c4 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. e4 Bg7 8. Nd2 0-0 9. Nc4 b5 10. Nxb5 Nxe4 11. Be2 a6 12. Nba3 Nd7 13. 0-0 Ne5 14. Be3 Re8 15. Rc1 Bb7 16. Nxe5 Rxe5 17. Nc4 Rxd5 18. Qb3 Rb8 19. Bf3 Rf5 20. Qc2 Rxf3 21. gxf3 Ng5 22. Nd2 Nxf3+ 23. Nxf3 Bxf3 0-1

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.12"]
[Round "5"]
[White "Ossa, Juan Sebastian"]
[Black "Jaramillo Ochoa, Mateo"]
[Result "1-0"]
[ECO "E92"]
[WhiteElo "1938"]
[BlackElo "1955"]
[PlyCount "109"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. 0-0 c6 11. a3 Nbd7 12. Nd2 Nf8 13. f3 Ne6 14. Be3 Nd7 15. Rac1 Nd4 16. Rfd1 a5 17. Bf1 Nc5 18. b4 axb4 19. axb4 Nce6 20. c5 Ra3 21. Nc4 Rb3 22. Na2 Bd7 23. Rc3 Rxc3 24. Nxc3 Rd8 25. Rd2 Bc8 26. Na4 f6 27. Nab6 Bf8 28. Ra2 Bd7 29. Na5 Nxc5 30. bxc5 Bxc5 31. Nac4 Be6 32. Ra5 Bxb6 33. Nxb6 Nc2 34. Kf2 Rd1 35. Be2 Rb1 36. Ra8+ Kg7 37. Rb8 Nxe3 38. Rxb7+ Kh6 39. Kxe3 Rb3+ 40. Kd2 Rb2+ 41. Kd1 c5 42. Rb8 c4 43. Nd7 Rxe2 44. Kxe2 Bxd7 45. Rb4 Kg5 46. Rb7 Ba4 47. Rxh7 f5 48. exf5 Kxf5 49. Rc7 Bb3 50. Ke3 g5 51. Rc6 g4 52. fxg4+ Kxg4 53. Ke4 Bc2+ 54. Kxe5 Bd3 55. Kd4 1-0

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.11"]
[Round "4"]
[White "Fortis, Jonathan"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B24"]
[BlackElo "1938"]
[PlyCount "86"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 Nc6 4. Nf3 a6 5. g3 Qc7 6. Bg2 d6 7. 0-0 Nf6 8. d3 Be7 9. Re1 0-0 10. a4 b6 11. e5 Nd7 12. Bd2 Bb7 13. exd6 Bxd6 14. Ne4 Be7 15. Bc3 Rac8 16. Nfg5 h6 17. Nf3 Rfd8 18. Nfd2 Nd4 19. b3 Nf6 20. Bb2 Nd5 21. Nc4 Nf6 22. Ncd2 Rd7 23. Nc4 Nxe4 24. Bxe4 Bf6 25. Bxb7 Qxb7 26. Rf1 Rcd8 27. Rb1 b5 28. Nd2 bxa4 29. bxa4 Qc6 30. Ne4 Be7 31. Bc3 Qxa4 32. Bxd4 Qxd4+ 33. Kg2 c4 34. Nf2 Qd5+ 35. Kg1 cxd3 36. cxd3 Bc5 37. Ra1 a5 38. Qe2 Bb6 39. Rfd1 Qd4 40. Kf1 a4 41. Rac1 a3 42. Rc4 Qd5 43. Kg1 Qxc4 0-1

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.10"]
[Round "2"]
[White "Ossa, Juan Sebastian"]
[Black "Rendon, Daniel"]
[Result "0-1"]
[ECO "D43"]
[WhiteElo "1938"]
[BlackElo "2110"]
[PlyCount "96"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Bd3 dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. 0-0 g6 12. Rc1 e5 13. Be4 a6 14. d5 c5 15. d6 Bxe4 16. Nxe4 Qe6 17. Nxc5 Nxc5 18. Rxc5 Bxd6 19. Rc6 Ke7 20. Qc2 Rhc8 21. Rd1 Rxc6 22. Qxc6 Rc8 23. Qxa6 e4 24. Qxb5 exf3 25. Qb7+ Rc7 26. Qxf3 Qxa2 27. Qe4+ Qe6 28. Qa4 Qe5 29. g3 g5 30. Qa6 h5 31. Qe2 h4 32. Qg4 hxg3 33. hxg3 Bc5 34. Qf3 f6 35. Qh5 Qe4 36. Qh8 Bd6 37. Qg7+ Ke8 38. Qg8+ Ke7 39. Qg7+ Ke6 40. Qg8+ Kf5 41. Qd5+ Qxd5 42. Rxd5+ Ke6 43. Rd2 Be5 44. Kg2 Rb7 45. Kf3 Rb4 46. b3 g4+ 47. Ke2 Rxb3 48. Rc2 Rb2 0-1

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.10"]
[Round "3"]
[White "Pirir, Jonathan"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[BlackElo "1938"]
[PlyCount "48"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. Bg5 Be7 8. 0-0 Qc5 9. Be3 Qc7 10. f4 d6 11. h3 Nc6 12. Nb3 0-0 13. Rf3 b5 14. Rg3 Re8 15. f5 d5 16. Qf3 Bd6 17. Rg5 h6 18. Rg4 Nxg4 19. Qxg4 exf5 20. Qh5 dxe4 21. Nd5 Qd8 22. Be2 g6 23. Qxh6 Bf8 24. Qf4 Qxd5 0-1

[Event "Central America-ch U16"]
[Site "Medellin"]
[Date "2010.12.09"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Toro Henao, Juan Sebastian"]
[Result "1-0"]
[ECO "D17"]
[WhiteElo "1938"]
[PlyCount "55"]
[EventDate "2010.12.09"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2013"]
[Source "ChessBase"]
[SourceDate "2012.11.22"]
[SourceVersion "1"]
[SourceVersionDate "2012.11.22"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Qd4 f6 12. Rd1 g5 13. Bc1 Bc5 14. Nd6+ Kf8 15. Qd2 Qb6 16. Nce4 Bxe4 17. Nxe4 Bb4 18. Nc3 Kf7 19. Bg2 Rad8 20. 0-0 h5 21. Qc2 h4 22. Ne4 hxg3 23. hxg3 Qc7 24. Qb3+ Kg6 25. Qxb4 Rh7 26. Qd6 Qxd6 27. Nxd6 Nc5 28. b4 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.11.01"]
[Round "6"]
[White "Guzman, River"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B41"]
[BlackElo "1938"]
[PlyCount "67"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Be2 Nf6 6. Bg5 Qa5+ 7. Bd2 Qb6 8. Be3 Bc5 9. Qd3 Qxb2 10. 0-0 Be7 11. Nc3 Nc6 12. Rab1 Qa3 13. f4 0-0 14. Nb3 e5 15. Rfd1 Ne8 16. Nd5 Qd6 17. Bc5 Qe6 18. f5 Bxc5+ 19. Nxc5 Qd6 20. Nxb7 Bxb7 21. Rxb7 Nd4 22. c3 Nc6 23. Qe3 Qa3 24. Nb6 Rb8 25. Rdxd7 Nf6 26. Rxb8 Rxb8 27. Rc7 Nd4 28. Bc4 Rf8 29. Rc8 Rxc8 30. Nxc8 Ng4 31. Qd2 Nc6 32. Bd5 Qc5+ 33. Kf1 Nd8 34. Bb7 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.11.01"]
[Round "7"]
[White "Ossa, Juan Sebastian"]
[Black "Sanchez, Andres Gilberto"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "1938"]
[BlackElo "1884"]
[PlyCount "25"]
[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 d6 2. Nf3 c6 3. c4 Nd7 4. Nc3 Qc7 5. Bf4 e5 6. Bg3 Ngf6 7. e3 Be7 8. Bd3 0-0 9. 0-0 Re8 10. Qc2 Bf8 11. Ng5 h6 12. Bh7+ Kh8 13. Nxf7# 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "4"]
[White "Cayon, Diego Mauricio"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1938"]
[PlyCount "78"]
[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. Nc3 e6 3. g3 d5 4. Bg2 dxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. Ne2 Bd6 8. d4 Nc6 9. Be3 cxd4 10. Nxd4 Nxd4 11. Bxd4 Be5 12. c3 Bxd4 13. Qxd4 Qxd4 14. cxd4 0-0 15. Ke2 Bd7 16. Rac1 Rac8 17. Bxb7 Rb8 18. Rc7 Rxb7 19. Rxb7 Bc6 20. Rxa7 Bxh1 21. f3 Rc8 22. a4 h5 23. Rb7 Rc4 24. b4 Rc2+ 25. Kd3 Ra2 26. Ra7 Bxf3 27. b5 Bd5 28. a5 Rxh2 29. Kc3 Rh3 30. Rd7 Rxg3+ 31. Kb4 Rb3+ 32. Ka4 Rb1 33. a6 h4 34. a7 Ra1+ 35. Kb4 h3 36. b6 h2 37. Rxd5 h1Q 38. Rd7 Qc6 39. b7 Rb1+ 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "3"]
[White "Ossa, Juan Sebastian"]
[Black "Hoyos, Julio Cesar"]
[Result "1/2-1/2"]
[ECO "A96"]
[WhiteElo "1938"]
[PlyCount "64"]
[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 e6 2. Nf3 f5 3. g3 Nf6 4. Bg2 Be7 5. 0-0 0-0 6. c4 d6 7. Re1 Qe8 8. b3 Qh5 9. Ba3 Ne4 10. Nbd2 Nxd2 11. Qxd2 Nd7 12. e4 fxe4 13. Rxe4 Rxf3 14. Qd1 Qa5 15. Qxf3 Qxa3 16. Rxe6 Ne5 17. Rxe5 dxe5 18. Qd5+ Kf8 19. dxe5 c6 20. Qe4 g6 21. e6 Qb2 22. Rd1 Qf6 23. Bh3 Bxe6 24. Bxe6 Bc5 25. Rd2 Re8 26. Re2 Kg7 27. Kg2 Qd4 28. Qc2 Qf6 29. Bg4 Rxe2 30. Qxe2 Qe7 31. Qd2 Qe4+ 32. Bf3 Qd4 1/2-1/2

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.31"]
[Round "5"]
[White "Ossa, Juan Sebastian"]
[Black "Ossa, Orlando Jose"]
[Result "0-1"]
[ECO "E92"]
[WhiteElo "1938"]
[BlackElo "2257"]
[PlyCount "100"]
[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. Nf3 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Nbd7 10. 0-0-0 Rf8 11. Nd2 c6 12. Nb3 Re8 13. f3 Nf8 14. g3 Ne6 15. Be3 Bf8 16. Rd2 Nd7 17. Rhd1 Ndc5 18. Nxc5 Bxc5 19. Bxc5 Nxc5 20. b4 Ne6 21. c5 a5 22. a3 axb4 23. axb4 Nd4 24. Bc4 Be6 25. Bxe6 Rxe6 26. Rd3 Ra3 27. Nb1 Ra4 28. Rxd4 exd4 29. Rxd4 Kf8 30. Kb2 Ke7 31. Nd2 g5 32. Nb3 Rh6 33. Na5 Rxh2+ 34. Kb3 Rha2 35. Nc4 Ra8 36. Na5 Rf2 37. Nxb7 Rxf3+ 38. Kb2 h5 39. e5 Rxg3 40. Na5 Rc8 41. Rd6 h4 42. Nxc6+ Kf8 43. b5 h3 44. b6 h2 45. b7 Rb8 46. Nxb8 h1Q 47. Nd7+ Kg7 48. b8Q Qh2+ 49. Kc1 Rc3+ 50. Kd1 Qc2+ 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2010.10.30"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Tamayo, Juan Jose"]
[Result "1-0"]
[ECO "D24"]
[WhiteElo "1938"]
[PlyCount "41"]
[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. Nf3 c5 3. c4 Nc6 4. Nc3 Nf6 5. dxc5 e6 6. Bg5 dxc4 7. e3 Qxd1+ 8. Rxd1 Bxc5 9. Bxc4 h6 10. Bh4 g5 11. Bg3 Bd7 12. Ne5 Nxe5 13. Bxe5 Be7 14. 0-0 0-0-0 15. Rc1 Bc6 16. b4 Rhe8 17. b5 Bd7 18. Na4 Bc6 19. bxc6 bxc6 20. Rb1 Nd7 21. Ba6# 1-0

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.04.01"]
[Round "8.1"]
[White "Pardo, Javier Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1997"]
[BlackElo "1920"]
[PlyCount "88"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 Qc7 7. Qe2 d6 8. c4 Nbd7 9. Nc3 g6 10. Be3 Bg7 11. f3 0-0 12. Rac1 b6 13. Nd5 exd5 14. cxd5 Qd8 15. Nc6 Qe8 16. b4 Bb7 17. Rc2 b5 18. Na5 Bxd5 19. exd5 Nxd5 20. Bd2 Qxe2 21. Bxe2 N5b6 22. Be3 Rfe8 23. Bf2 Rac8 24. Rxc8 Rxc8 25. Bd3 Nc4 26. Nxc4 bxc4 27. Bc2 Bc3 28. a3 Bb2 29. a4 Ba3 30. b5 axb5 31. axb5 Bc5 32. Rd1 Rd8 33. Be4 Bxf2+ 34. Kxf2 Nb6 35. Bc6 Kf8 36. Ke3 Ke7 37. Kd4 f5 38. f4 Ke6 39. Bd5+ Nxd5 40. Re1+ Kd7 41. Kxd5 Rc8 42. Rc1 c3 43. Kd4 c2 44. Kd3 d5 0-1

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.31"]
[Round "6.1"]
[White "Munoz Hidalgo, Luis Miguel1111"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "1812"]
[BlackElo "1920"]
[PlyCount "56"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 Qc7 7. Qe2 d6 8. c4 Nbd7 9. Nc3 g6 10. Be3 Bg7 11. Rac1 0-0 12. f3 b6 13. b4 Re8 14. Qf2 Bf8 15. Rfd1 Qb7 16. Nb3 Rb8 17. Na4 Qc6 18. b5 Qb7 19. Nc3 a5 20. Nd4 Ne5 21. Na4 Nfd7 22. Bf1 Qc7 23. Be2 Nc5 24. Nc3 Bb7 25. Nb3 Ned7 26. Nxc5 Nxc5 27. Bxc5 dxc5 28. Rd2 Bh6 0-1

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.31"]
[Round "5.1"]
[White "Ossa, Juan Sebastian"]
[Black "Carvajal Yasno, Juan Diego"]
[Result "1-0"]
[ECO "D55"]
[WhiteElo "1920"]
[PlyCount "87"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[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 Be7 5. Bg5 0-0 6. e3 b6 7. cxd5 Nxd5 8. Nxd5 exd5 9. Bxe7 Qxe7 10. Bd3 Qb4+ 11. Qd2 Qxd2+ 12. Nxd2 g6 13. Rc1 Ba6 14. Bxa6 Nxa6 15. 0-0 c5 16. dxc5 Nxc5 17. Nf3 Nd3 18. Rb1 Rfd8 19. Rfd1 Nc5 20. Rbc1 Ne6 21. Ne5 Kf8 22. Nc6 Rd6 23. h3 a5 24. Ne5 Rad8 25. Rc2 f6 26. Nf3 d4 27. Nxd4 Nxd4 28. Rxd4 Rxd4 29. exd4 Rxd4 30. Rc6 Rb4 31. b3 f5 32. Kf1 a4 33. Rc4 Rxc4 34. bxc4 Ke7 35. Ke2 Kd6 36. Kd3 Kc5 37. a3 b5 38. cxb5 Kxb5 39. Kd4 Ka5 40. f4 h6 41. h4 Kb5 42. Kd5 Kb6 43. Kc4 Kc6 44. Kb4 1-0

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.30"]
[Round "4.1"]
[White "Juez, Jhon Alexander"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2042"]
[BlackElo "1920"]
[PlyCount "85"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[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 d5 4. exd5 Qxd5 5. cxd4 Nc6 6. Nf3 Bg4 7. Be2 Nf6 8. Nc3 Qa5 9. 0-0 e6 10. Be3 Be7 11. a3 Rc8 12. Qb3 Qc7 13. Qa4 0-0 14. Rac1 Rfd8 15. Rfd1 Qb8 16. Bg5 Nd5 17. Nxd5 Bxg5 18. Ne3 Bxf3 19. Bxf3 Nxd4 20. Rxc8 Nxf3+ 21. gxf3 Qxc8 22. Rxd8+ Qxd8 23. Qxa7 Qc8 24. Kg2 h6 25. b4 b5 26. Ng4 Bf4 27. Qd4 Qc4 28. Qd7 h5 29. Qe8+ Kh7 30. Nf6+ Kg6 31. Ne4 Qd5 32. Qc8 Qc4 33. Qd7 Be5 34. Qd8 Qc1 35. Qd3 Qc4 36. Qd8 Qc1 37. Qd3 Qf4 38. Ng3+ Kh6 39. Qxb5 h4 40. Nf1 Qg5+ 41. Kh1 h3 42. Ne3 Qf4 43. Qxe5 1-0

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.30"]
[Round "3.1"]
[White "Ossa, Juan Sebastian"]
[Black "Ruiz Castillo, Joshua Daniel"]
[Result "0-1"]
[ECO "D52"]
[WhiteElo "1920"]
[BlackElo "2063"]
[PlyCount "78"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. c4 Nf6 4. Nc3 c6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8. Qd2 Bb4 9. Rc1 h6 10. Bh4 0-0 11. a3 Bxc3 12. bxc3 Qxa3 13. Bd3 Qd6 14. e4 Nf4 15. Bf1 Ng6 16. Bg3 Qe7 17. Bc4 b5 18. Ba2 Bb7 19. 0-0 c5 20. dxc5 Nxc5 21. Bd6 Nxe4 22. Bxe7 Nxd2 23. Bxf8 Nxf1 24. Bc5 Bxf3 25. Kxf1 Bc6 26. Rd1 Nf4 27. f3 Bd5 28. Ra1 Rc8 29. Bb4 Ra8 30. g3 Nd3 31. Bxd5 exd5 32. Bd6 Nb2 33. Bb4 Na4 34. Ba5 Rc8 35. Ke2 a6 36. Kd2 f6 37. Bb4 Kf7 38. Kd3 a5 39. Bxa5 Ra8 0-1

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.29"]
[Round "2.1"]
[White "Camargo, Santiago"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2074"]
[BlackElo "1920"]
[PlyCount "36"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Be2 Nf6 6. Nc3 Qc7 7. a3 b5 8. 0-0 Bb7 9. Qd3 Be7 10. f4 d6 11. Be3 Nbd7 12. b4 Nb6 13. Kh1 0-0 14. Bf3 Rac8 15. f5 e5 16. Nde2 Rfd8 17. Rfd1 Nc4 18. Bf2 Nb2 0-1

[Event "COL-ch U16"]
[Site "Bogota"]
[Date "2010.03.29"]
[Round "1.1"]
[White "Ossa, Juan Sebastian"]
[Black "Palomino Escobar, Daniel Fernando"]
[Result "1-0"]
[ECO "D66"]
[WhiteElo "1920"]
[PlyCount "42"]
[EventDate "2010.03.29"]
[EventType "swiss"]
[EventRounds "8"]
[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 Nf6 5. Bg5 Be7 6. e3 0-0 7. Rc1 Nbd7 8. Bd3 dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. 0-0 a6 12. Ne5 h6 13. Bh4 Nd5 14. Bxe7 Qxe7 15. Ne4 Nxe5 16. dxe5 f6 17. exf6 Nxf6 18. Nc5 Rad8 19. Qb3 Rfe8 20. Bg6 Rd5 21. Bxe8 Nxe8 1-0

[Event "Valle Region-ch U20 Absoluto"]
[Site "Cali"]
[Date "2010.03.07"]
[Round "6"]
[White "Hernandez, Cristian Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1932"]
[BlackElo "1920"]
[PlyCount "79"]
[EventDate "2010.03.05"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be3 d6 8. Rc1 Nbd7 9. g3 Nc5 10. Bg2 Ng4 11. Qxg4 Nd3+ 12. Kd2 Nxc1 13. Qd1 Nxa2 14. Qa4+ b5 15. Qxa2 bxc4 16. Bf1 Rb8 17. Bxc4 Be7 18. b3 Bf6 19. Qa4+ Bd7 20. Qxa6 0-0 21. Ra1 Bxd4 22. Bxd4 Bc6 23. Qa5 Qd7 24. Qg5 e5 25. Be3 Ra8 26. Rd1 Qb7 27. Qg4 Kh8 28. Rc1 f5 29. exf5 d5 30. Bc5 Rfd8 31. Bd3 e4 32. Bc2 d4 33. Nxe4 d3 34. Nd6 dxc2 35. Qd4 Qxb3 36. Rxc2 Ra4 37. Nf7+ Qxf7 38. Qxd8+ Be8 39. Be3 Ra7 40. Bxa7 1-0

[Event "Valle Region-ch U20 Absoluto"]
[Site "Cali"]
[Date "2010.03.07"]
[Round "7"]
[White "Ossa, Juan Sebastian"]
[Black "Ceron, Edgar Ivan"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "1920"]
[BlackElo "2001"]
[PlyCount "20"]
[EventDate "2010.03.05"]
[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 Nf6 3. c4 e6 4. Nc3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Bd3 dxc4 9. Bxc4 Bb4 10. 0-0 0-0 1/2-1/2

[Event "Valle Region-ch U20 Absoluto"]
[Site "Cali"]
[Date "2010.03.06"]
[Round "5"]
[White "Ossa, Juan Sebastian"]
[Black "Dominguez, Oscar Alberto"]
[Result "1-0"]
[ECO "D58"]
[WhiteElo "1920"]
[BlackElo "1892"]
[PlyCount "122"]
[EventDate "2010.03.05"]
[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 Nf6 3. c4 e6 4. Bg5 Be7 5. Nc3 h6 6. Bh4 0-0 7. e3 b6 8. cxd5 exd5 9. Be2 Bb7 10. 0-0 Nbd7 11. Rc1 Ne4 12. Bxe7 Qxe7 13. Qa4 a6 14. Qb3 c6 15. Rfd1 Rfe8 16. Nd2 Nxf2 17. Kxf2 Qxe3+ 18. Kf1 Qxd4 19. Nf3 Qe3 20. Re1 Qf4 21. Qd1 Re3 22. Kg1 Nf6 23. g3 Qf5 24. Nh4 Qe5 25. Ng2 d4 26. Nb1 c5 27. Bf1 Rxe1 28. Qxe1 Qd5 29. Nd2 Re8 30. Qf2 Ng4 31. Bc4 Qh5 32. Nf4 Qg5 33. Qf1 Re3 34. Ng2 Qg6 35. Nxe3 dxe3 36. Nf3 Qe4 37. Kg2 e2 38. Qxe2 Ne3+ 39. Kg1 Nxc4 40. Qxe4 Bxe4 41. Rxc4 Bxf3 42. Rc2 Kf8 43. Kf2 Bd5 44. Rd2 Bxa2 45. Rd6 b5 46. Rxa6 Bb3 47. Rc6 c4 48. Rb6 Ba4 49. Rb7 g6 50. Ke3 Kg7 51. Rb6 h5 52. h4 Kf8 53. Rb7 Kg7 54. Kf4 Bc2 55. Rxb5 Bd3 56. Rc5 Bf1 57. Ke5 Be2 58. Rc6 Bd3 59. Kd4 Be2 60. Rxc4 Bxc4 61. Kxc4 Kf8 1-0

[Event "Valle Region-ch U20 Absoluto"]
[Site "Cali"]
[Date "2010.03.06"]
[Round "3"]
[White "Ossa, Juan Sebastian"]
[Black "Moreno, Nestor"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "1920"]
[PlyCount "84"]
[EventDate "2010.03.05"]
[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 d6 3. e4 Nf6 4. Nc3 a6 5. a4 g6 6. Nf3 Bg4 7. Be2 Bg7 8. 0-0 0-0 9. Nd2 Bxe2 10. Qxe2 Nbd7 11. f4 Qc7 12. a5 b6 13. axb6 Nxb6 14. Rxa6 Rxa6 15. Qxa6 Ra8 16. Qe2 Nfd7 17. Nf3 Qb7 18. Kh1 Na4 19. Nxa4 Rxa4 20. b3 Qa6 21. Qxa6 Rxa6 22. Bd2 Ra2 23. Rc1 Nf6 24. e5 Nxd5 25. c4 Nb4 26. Bxb4 cxb4 27. Rd1 Rb2 28. exd6 exd6 29. Nd2 Bd4 30. g3 Bc5 31. Ne4 Rxb3 32. Nxd6 Rc3 33. Ne4 Rxc4 34. Nxc5 Rxc5 35. Rb1 Rb5 36. Rb3 Kg7 37. Kg2 Kf6 38. Kf3 h5 39. h4 Kf5 40. Ke3 Rc5 41. Rxb4 Rc3+ 42. Kf2 Kg4 1/2-1/2

[Event "Valle Region-ch U20 Absoluto"]
[Site "Cali"]
[Date "2010.03.05"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Rosero, Jefferson"]
[Result "1-0"]
[ECO "A58"]
[WhiteElo "1920"]
[PlyCount "75"]
[EventDate "2010.03.05"]
[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. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 d6 6. e3 Bxa6 7. Qa4+ Qd7 8. Qxd7+ Nfxd7 9. Bxa6 Nxa6 10. a3 Nb4 11. Kd2 Ne5 12. Nc3 Nc4+ 13. Ke2 Nb6 14. e4 Nc2 15. Rb1 Nd4+ 16. Kd3 Nd7 17. Nf3 Nb3 18. Bf4 g6 19. Nd2 Nd4 20. Nc4 Bg7 21. a4 0-0 22. Ra1 Rfb8 23. a5 Rb3 24. Ra3 Rbb8 25. Na4 Nb3 26. Nab6 Nxb6 27. axb6 Rxa3 28. bxa3 f5 29. Rb1 fxe4+ 30. Kxe4 Nd4 31. Na5 Ne2 32. Bd2 e6 33. b7 Nd4 34. Nc6 Nxc6 35. dxc6 d5+ 36. Kf3 Rf8+ 37. Bf4 Be5 38. b8Q 1-0

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.28"]
[Round "6.2"]
[White "Ossa, Juan Sebastian"]
[Black "Cardona, Juan Camilo"]
[Result "1-0"]
[ECO "E07"]
[WhiteElo "1921"]
[BlackElo "1987"]
[PlyCount "57"]
[EventDate "2010.02.26"]
[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. g3 d5 3. Bg2 e6 4. 0-0 Be7 5. d4 Nbd7 6. c4 0-0 7. cxd5 exd5 8. Nc3 Re8 9. Re1 c6 10. Qc2 Bd6 11. h3 Ne4 12. Nxe4 dxe4 13. Ng5 Nf6 14. Nxe4 Nxe4 15. Bxe4 Bb4 16. Rd1 Bxh3 17. Bxh7+ Kh8 18. Bf5 Bxf5 19. Qxf5 Qe7 20. Be3 Rad8 21. Rd3 Rd5 22. Qg4 Qf6 23. Kg2 c5 24. Rh1+ Kg8 25. Qh3 Kf8 26. dxc5 Rxd3 27. exd3 Qxb2 28. Qd7 g6 29. Bh6+ 1-0

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.28"]
[Round "7.2"]
[White "Valencia, Adrian David"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "1911"]
[BlackElo "1921"]
[PlyCount "91"]
[EventDate "2010.02.26"]
[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 e6 3. d3 Nc6 4. g3 Qc7 5. Bg2 d5 6. Nbd2 Bd6 7. 0-0 Nge7 8. Re1 0-0 9. Qe2 f6 10. Nf1 b5 11. h4 b4 12. N1h2 Nd4 13. Nxd4 cxd4 14. f4 Bb7 15. e5 fxe5 16. fxe5 Bc5 17. Ng4 Nf5 18. Bf4 Nxh4 19. Nf6+ gxf6 20. exf6 Qf7 21. gxh4 Qxf6 22. Bg5 Qf7 23. Qxe6 Rae8 24. Qxf7+ Kxf7 25. Bh6 Rg8 26. Rf1+ Kg6 27. Bg5 Re2 28. Rf6+ Kg7 29. Raf1 Re7 30. R6f5 Rd7 31. Bf6+ Kh6 32. Be5 Bd6 33. Rf6+ Rg6 34. Bxd6 Rxd6 35. Rxd6 Rxd6 36. Rf7 Bc8 37. Rxa7 Bf5 38. Rb7 Rc6 39. Rxb4 Rxc2 40. Bxd5 Bxd3 41. Rxd4 Bg6 42. b4 Kg7 43. a4 Kf6 44. Be4 Bxe4 45. Rxe4 Kf5 46. Re7 1-0

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.27"]
[Round "3.1"]
[White "Escobar Barona, Juan Fernando"]
[Black "Ossa, Juan Sebastian"]
[Result "1/2-1/2"]
[ECO "B42"]
[WhiteElo "1987"]
[BlackElo "1921"]
[PlyCount "102"]
[EventDate "2010.02.26"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 Qc7 7. Qe2 d6 8. c4 g6 9. b3 Bg7 10. Bb2 0-0 11. Kh1 Nbd7 12. f4 Nh5 13. f5 Ne5 14. fxg6 hxg6 15. Nd2 Qc5 16. Bc2 Bd7 17. Rab1 Rac8 18. N2f3 Ng4 19. Qe1 e5 20. h3 Ne3 21. Qxe3 Ng3+ 22. Kg1 Nxf1 23. Kxf1 exd4 24. Nxd4 b5 25. Bd3 bxc4 26. Bxc4 Bb5 27. Rc1 Bxc4+ 28. Rxc4 Qh5 29. g4 Qh4 30. Kg2 Rxc4 31. bxc4 Rb8 32. Bc3 Rc8 33. Qe2 Be5 34. Be1 Qe7 35. Nf3 Rb8 36. Bh4 Bf6 37. Qf2 Rb2 38. Qxb2 Bxh4 39. Nxh4 Qxh4 40. Qb8+ Kh7 41. Qxd6 Qe1 42. Qd3 Qc1 43. Qe2 a5 44. a4 Qc3 45. e5 Qb3 46. e6 fxe6 47. Qxe6 Qxa4 48. Qe7+ Kg8 49. Qe6+ Kh7 50. Qe7+ Kg8 51. Qe6+ Kh7 1/2-1/2

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.27"]
[Round "4.3"]
[White "Ossa, Juan Sebastian"]
[Black "Diaz, Cristian Camilo"]
[Result "0-1"]
[ECO "E12"]
[WhiteElo "1921"]
[BlackElo "2030"]
[PlyCount "38"]
[EventDate "2010.02.26"]
[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. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 Be7 6. e3 c5 7. d5 exd5 8. cxd5 d6 9. e4 0-0 10. Qc2 Nxd5 11. Nxd5 Bxd5 12. Bf4 Bb7 13. 0-0-0 Nc6 14. Bc4 Nb4 15. Qb3 Bxe4 16. Rd2 d5 17. Qa4 Qc8 18. a3 dxc4 19. axb4 cxb4 0-1

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.27"]
[Round "5.3"]
[White "Valencia, David Fernando"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1826"]
[BlackElo "1921"]
[PlyCount "58"]
[EventDate "2010.02.26"]
[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 e6 3. f4 d5 4. e5 Nc6 5. Bb5 a6 6. Bxc6+ bxc6 7. Nf3 Nh6 8. d3 Rb8 9. b3 Nf5 10. 0-0 h5 11. Na4 Be7 12. c4 h4 13. Qe1 Nd4 14. Qd1 Nf5 15. Qd2 Rg8 16. Ba3 g5 17. fxg5 Rb4 18. Bxb4 cxb4 19. Qf2 Bxg5 20. Nxg5 Qxg5 21. Nc5 Rg7 22. Rae1 Qh6 23. Re2 Ng3 24. Rc2 Nxf1 25. Kxf1 Rg5 26. Qe2 Rf5+ 27. Ke1 Qf4 28. Kd1 Qd4 29. cxd5 Qg1+ 0-1

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.26"]
[Round "1.6"]
[White "Norena, Wilder"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1586"]
[BlackElo "1921"]
[PlyCount "88"]
[EventDate "2010.02.26"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. f3 Nf6 7. a3 b5 8. Be2 Bb7 9. Bg5 Bc5 10. Bh4 0-0 11. Qd2 Qb6 12. Nb3 Be3 13. Qd3 Nh5 14. Bg3 Nf4 15. Bxf4 Bxf4 16. g3 Bg5 17. f4 Be7 18. Rf1 Nc6 19. Nd1 Rac8 20. Qe3 Qc7 21. Nf2 Rfd8 22. Nd3 Na5 23. Rc1 Nc4 24. Qd4 d6 25. Bf3 Bf6 26. Qf2 Nxb2 27. Rb1 Bc3+ 28. Ke2 Qc4 29. Ke3 d5 30. e5 d4+ 31. Ke2 Bxf3+ 32. Qxf3 Nxd3 33. Qxd3 Qa4 34. f5 Qxa3 35. Qf3 exf5 36. Qxf5 Qe7 37. Rbd1 d3+ 38. Rxd3 Qxe5+ 39. Qxe5 Bxe5 40. Rfd1 Rxc2+ 41. Kf1 Rxd3 42. Rxd3 f6 43. Rd8+ Kf7 44. Rd7+ Kg6 0-1

[Event "Valle Region-ch U16"]
[Site "Yumbo"]
[Date "2010.02.26"]
[Round "2.5"]
[White "Ossa, Juan Sebastian"]
[Black "Hurtado, Wilson David"]
[Result "1-0"]
[ECO "E97"]
[WhiteElo "1921"]
[BlackElo "1807"]
[PlyCount "53"]
[EventDate "2010.02.26"]
[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 0-0 5. e4 d6 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 Ne8 10. a4 f5 11. Nd2 Nf6 12. Ba3 Rf7 13. Rc1 Bf8 14. c5 f4 15. cxd6 cxd6 16. Nb5 g5 17. Rc3 Ng6 18. Qc2 g4 19. Rc1 Bd7 20. Nc7 Rc8 21. Ne6 Rxc3 22. Qxc3 Bxe6 23. dxe6 Re7 24. Qc8 Qxc8 25. Rxc8 Ne8 26. Bxg4 Nc7 27. b5 1-0

[Event "Manizales op 22nd"]
[Site "Manizales"]
[Date "2010.01.09"]
[Round "4"]
[White "Franco, Marco Tulio"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "A05"]
[BlackElo "1921"]
[PlyCount "65"]
[EventDate "2010.01.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "CBM 134 Extra"]
[Source "ChessBase"]
[SourceDate "2010.03.03"]
[SourceVersion "1"]
[SourceVersionDate "2010.03.03"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d3 0-0 5. 0-0 d6 6. e4 e5 7. Nbd2 Nc6 8. c3 h6 9. Re1 Bd7 10. Qc2 Qc8 11. Nf1 Bh3 12. Bd2 Nh5 13. Nh4 Bxg2 14. Kxg2 Nf4+ 15. Bxf4 exf4 16. Qd2 Qd7 17. Qxf4 g5 18. Qf5 Qd8 19. Nf3 Ne7 20. Qg4 Ng6 21. Ne3 Qf6 22. Qf5 Rae8 23. Qxf6 Bxf6 24. Nf5 Kh7 25. h3 h5 26. Rad1 Ne7 27. Nxe7 Rxe7 28. Nd4 Bxd4 29. cxd4 c6 30. f4 gxf4 31. gxf4 f6 32. Kf2 Kh6 33. Rg1 1-0

[Event "Manizales op 22nd"]
[Site "Manizales"]
[Date "2010.01.08"]
[Round "3"]
[White "Ossa, Juan Sebastian"]
[Black "Marin, Rogelio"]
[Result "0-1"]
[ECO "D66"]
[WhiteElo "1921"]
[PlyCount "24"]
[EventDate "2010.01.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "CBM 134 Extra"]
[Source "ChessBase"]
[SourceDate "2010.03.03"]
[SourceVersion "1"]
[SourceVersionDate "2010.03.03"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Bg5 Be7 5. Nc3 c6 6. e3 Nbd7 7. Rc1 0-0 8. Bd3 h6 9. Bh4 dxc4 10. Bxc4 Nb6 11. Bb3 Nbd5 12. 0-0 b6 0-1

[Event "Manizales op 22nd"]
[Site "Manizales"]
[Date "2010.01.08"]
[Round "2"]
[White "Zuluaga Mancilla, Cesar"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "E69"]
[WhiteElo "2319"]
[BlackElo "1921"]
[PlyCount "95"]
[EventDate "2010.01.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "CBM 134 Extra"]
[Source "ChessBase"]
[SourceDate "2010.03.03"]
[SourceVersion "1"]
[SourceVersionDate "2010.03.03"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. g3 d6 6. Bg2 Nbd7 7. 0-0 e5 8. h3 c6 9. e4 Re8 10. Be3 exd4 11. Nxd4 Nc5 12. Qc2 Qc7 13. Rad1 h6 14. Rfe1 Kh7 15. f4 Ne6 16. Kh2 Nh5 17. Nf3 Nf8 18. Qd3 f5 19. exf5 gxf5 20. Qxd6 Qf7 21. Bd4 Re6 22. Rxe6 Bxe6 23. b3 Qg6 24. Ne2 Bxd4 25. Qxd4 Nd7 26. Nh4 Qf7 27. Bf3 Ndf6 28. Qd3 Ng7 29. g4 Ng8 30. Ng3 Ne7 31. gxf5 Nexf5 32. Be4 Rf8 33. Ngxf5 Nxf5 34. Bxf5+ Bxf5 35. Nxf5 Qxf5 36. Qxf5+ Rxf5 37. Rd7+ Kg6 38. Rxb7 Ra5 39. a4 Kf5 40. Kg3 Ke4 41. Re7+ Kd4 42. Kf3 Kc3 43. Rb7 Kd4 44. h4 h5 45. Re7 a6 46. Re4+ Kc3 47. Re5 c5 48. Re3+ 1-0

[Event "Manizales op 22nd"]
[Site "Manizales"]
[Date "2010.01.07"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Gomez, Oscar"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1921"]
[PlyCount "31"]
[EventDate "2010.01.07"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "COL"]
[SourceTitle "CBM 134 Extra"]
[Source "ChessBase"]
[SourceDate "2010.03.03"]
[SourceVersion "1"]
[SourceVersionDate "2010.03.03"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 Ne4 4. Nc3 e6 5. Qc2 Bb4 6. a3 Bxc3+ 7. bxc3 0-0 8. Bf4 Qf6 9. Bxc7 Nc6 10. e3 b6 11. cxd5 exd5 12. Bd3 Bf5 13. 0-0 Qg6 14. Nh4 Qg5 15. Nxf5 Qxf5 16. f3 1-0

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "7.7"]
[White "Calderon, Arlex"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "D79"]
[WhiteElo "1600"]
[BlackElo "1921"]
[PlyCount "32"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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. c4 g6 3. g3 Bg7 4. Nf3 0-0 5. Bg2 c6 6. 0-0 d5 7. cxd5 cxd5 8. Nc3 Nc6 9. Bg5 h6 10. Bxf6 Bxf6 11. e3 Bg4 12. Qb3 e6 13. Qxb7 Na5 14. Qb5 Nc4 15. b3 Bxf3 16. Bxf3 Nd2 0-1

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "4.2"]
[White "Guelgua, Alvaro"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2004"]
[BlackElo "1921"]
[PlyCount "68"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 d6 7. c4 g6 8. b3 Bg7 9. Bb2 0-0 10. Nd2 Qc7 11. Kh1 Nbd7 12. f4 b6 13. f5 Nc5 14. Bc2 gxf5 15. exf5 e5 16. N4f3 Bb7 17. Qe2 Kh8 18. Ng5 Rg8 19. b4 Bh6 20. bxc5 Rxg5 21. Ne4 Nxe4 22. Bxe4 bxc5 23. Bc1 Rag8 24. Bxg5 Bxg5 25. Rab1 Bxe4 26. Qxe4 f6 27. Rb7 Qd8 28. Rfb1 Qe8 29. Qd5 e4 30. Qxd6 Qf8 31. Re7 Bf4 32. Rbb7 Rg7 33. Qe6 Rxe7 34. Rxe7 Qa8 1-0

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "2.2"]
[White "Moran, Daniel Stiven"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "E90"]
[WhiteElo "2035"]
[BlackElo "1921"]
[PlyCount "68"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nd5 Nxd5 10. cxd5 c6 11. Bc4 cxd5 12. Bxd5 Nc6 13. Bxc6 bxc6 14. 0-0 Ba6 15. Rfc1 Bd3 16. Nd2 f5 17. f3 Rd6 18. Kf2 Bb5 19. Nc4 Rd3 20. a4 Ba6 21. Ra3 Rd7 22. g3 Rb8 23. Ra2 fxe4 24. fxe4 Rb3 25. Ra3 Bxc4 26. Rxc4 Rxb2+ 27. Kf3 h5 28. g4 h4 29. Bg5 Rf7+ 30. Ke3 Rxh2 31. Rac3 h3 32. Rxc6 Rg2 33. Rc1 Rxg4 34. Rxg6 Kh7 0-1

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "3.2"]
[White "Ossa, Juan Sebastian"]
[Black "Arturo, Jose Elver Jr"]
[Result "0-1"]
[ECO "D67"]
[WhiteElo "1921"]
[BlackElo "1866"]
[PlyCount "52"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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 Nf6 3. c4 e6 4. Bg5 Be7 5. Nc3 Nbd7 6. e3 c6 7. Bd3 0-0 8. 0-0 dxc4 9. Bxc4 Nd5 10. Bxe7 Nxe7 11. Rc1 b5 12. Bd3 Bb7 13. Ne4 Rb8 14. Nd6 Ba8 15. Ne4 Ng6 16. Qc2 Qe7 17. Nc5 Rfd8 18. Be4 Rbc8 19. Qb3 Nb6 20. Rc2 Qd6 21. Rfc1 Ne7 22. Ne5 Ned5 23. Bxh7+ Kxh7 24. e4 Nf4 25. Qf3 Qxd4 26. Qxf4 Qd1+ 0-1

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "5.4"]
[White "Ossa, Juan Sebastian"]
[Black "Dominguez, Oscar Alberto"]
[Result "1/2-1/2"]
[ECO "A68"]
[WhiteElo "1921"]
[BlackElo "1755"]
[PlyCount "72"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Bd3 exd5 9. cxd5 Re8 10. 0-0 c4 11. Bc2 b5 12. Re1 Ba6 13. Nd4 b4 14. Na4 Nxd5 15. Nf3 Nb6 16. Nxb6 Qxb6+ 17. Be3 Qc7 18. Nd4 Nd7 19. Qg4 Nf6 20. Qf3 Re7 21. Bf2 Rae8 22. Ba4 Nd7 23. Nc6 Re6 24. Nxb4 Bb7 25. Nd5 Bxd5 26. exd5 Rxe1+ 27. Rxe1 Rxe1+ 28. Bxe1 Bxb2 29. Qe2 Bd4+ 30. Kh1 Nb6 31. Qe8+ Kg7 32. Bc6 Bf6 33. g4 Qc8 34. g5 Bb2 35. Qe2 Bd4 36. Qe4 Ba1 1/2-1/2

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "6.1"]
[White "Ossa, Juan Sebastian"]
[Black "Narvaez, Zamir Alexis"]
[Result "0-1"]
[ECO "D17"]
[WhiteElo "1921"]
[BlackElo "2170"]
[PlyCount "54"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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. Nc3 dxc4 5. a4 Bf5 6. Ne5 Nbd7 7. Nxc4 Qc7 8. g3 e5 9. dxe5 Nxe5 10. Bf4 Nfd7 11. Bg2 0-0-0 12. 0-0 g5 13. Bxg5 Nxc4 14. Bxd8 Qxd8 15. Qd4 Nce5 16. Qxa7 Bc5 17. Qa8+ Kc7 18. Nb5+ cxb5 19. Qxb7+ Kd6 20. axb5 Ke7 21. Qd5 Qb6 22. Qb3 Be6 23. Qc3 Qxb5 24. Rfd1 Rb8 25. Qd2 Ng4 26. Qg5+ Ndf6 27. e3 Bxe3 0-1

[Event "Valle Region-ch U18"]
[Site "Cali"]
[Date "2009.11.??"]
[Round "1.5"]
[White "Ossa, Juan Sebastian"]
[Black "Quijano, Juan Sebastian"]
[Result "1-0"]
[ECO "D15"]
[WhiteElo "1921"]
[BlackElo "1600"]
[PlyCount "75"]
[EventDate "2009.11.14"]
[EventType "tourn"]
[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 Nf6 3. c4 c6 4. Nc3 a6 5. Bg5 Ne4 6. Bh4 Bf5 7. e3 Qc7 8. Rc1 Nxc3 9. Rxc3 Qa5 10. a3 e6 11. Qb3 b5 12. cxb5 axb5 13. Nd2 b4 14. Rc1 bxa3 15. Qb7 f6 16. bxa3 Bxa3 17. Rd1 0-0 18. Be2 Bb4 19. 0-0 Bxd2 20. Bh5 Bd3 21. Rxd2 Bxf1 22. Kxf1 Qxd2 23. Qxa8 g5 24. Bg3 Qc1+ 25. Ke2 Qc2+ 26. Ke1 f5 27. Bd6 Qb1+ 28. Kd2 Rd8 29. Be5 Qb2+ 30. Kd1 Qb6 31. Qa3 Rd7 32. h4 Ra7 33. Qc1 Qb3+ 34. Ke1 Ra2 35. e4 Rc2 36. Qxg5+ Kf8 37. Qf6+ Kg8 38. Qg7# 1-0

[Event "Pan American-ch Schools U15"]
[Site "Columbia"]
[Date "2009.10.09"]
[Round "6"]
[White "Hernandez Sanchez, Jairo Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "1/2-1/2"]
[ECO "A08"]
[WhiteElo "2063"]
[BlackElo "1910"]
[PlyCount "118"]
[EventDate "2009.10.07"]
[EventType "rapid"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Qc7 6. Bg2 Bd6 7. 0-0 Nge7 8. Re1 0-0 9. Qe2 f6 10. c3 Rb8 11. h4 b5 12. h5 b4 13. h6 bxc3 14. hxg7 Rf7 15. bxc3 Rxg7 16. Nf1 Ne5 17. d4 cxd4 18. cxd4 Ng4 19. e5 fxe5 20. Nxe5 Nxe5 21. dxe5 Bb4 22. Bd2 Nf5 23. Bxb4 Rxb4 24. Rac1 Qb8 25. Qd2 Ba6 26. Rc6 Rb2 27. Qc1 Bc4 28. Nd2 Rb6 29. Rxb6 Qxb6 30. Nxc4 dxc4 31. Qxc4 Rxg3 32. Rc1 Rg6 33. Qc8+ Kf7 34. Qd7+ Ne7 35. Rc8 Qb1+ 36. Kh2 Rh6+ 37. Bh3 Qb4 38. Qe8+ Kg7 39. Qf8+ Kg6 40. Qf6+ Kh5 41. Qf7+ Kg5 42. Rf8 Rxh3+ 43. Kxh3 Qg4+ 44. Kh2 Qh4+ 45. Kg2 Qg4+ 46. Kf1 Qd1+ 47. Kg2 Qg4+ 48. Kf1 Qd1+ 49. Kg2 Qg4+ 50. Kf1 Qd1+ 51. Kg2 Qg4+ 52. Kf1 Qd1+ 53. Kg2 Qg4+ 54. Kf1 Qd1+ 55. Kg2 Qg4+ 56. Kf1 Qd1+ 57. Kg2 Qg4+ 58. Kf1 Qd1+ 59. Kg2 Qg4+ 1/2-1/2

[Event "Pan American-ch Schools U15"]
[Site "Columbia"]
[Date "2009.10.09"]
[Round "7"]
[White "Ossa, Juan Sebastian"]
[Black "Barros, Raul Junior"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "1910"]
[BlackElo "2072"]
[PlyCount "61"]
[EventDate "2009.10.07"]
[EventType "rapid"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 e6 5. Bg5 Be7 6. e3 0-0 7. Rc1 Ne4 8. Bxe7 Qxe7 9. Bd3 f5 10. 0-0 Nd7 11. Ne5 Nxe5 12. dxe5 Rd8 13. Qc2 b6 14. cxd5 exd5 15. f4 Bb7 16. Bxe4 dxe4 17. Rfd1 Rac8 18. Ne2 c5 19. Nc3 Ba6 20. Nb5 Bxb5 21. Qb3+ Qf7 22. Qxb5 Rd5 23. Kf1 Rcd8 24. Rxd5 Qxd5 25. Qb3 Qxb3 26. axb3 a5 27. Ke2 Rd3 28. Rc3 Rxc3 29. bxc3 b5 30. Kd2 Kf7 31. Kc2 1/2-1/2

[Event "Pan American-ch Schools U15"]
[Site "Columbia"]
[Date "2009.10.08"]
[Round "3"]
[White "Puentes, Gabriel Francisco"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "E92"]
[BlackElo "1910"]
[PlyCount "56"]
[EventDate "2009.10.07"]
[EventType "rapid"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 c6 10. 0-0 Na6 11. Rad1 Bg4 12. a3 Nc5 13. b4 Rxd1 14. Bxd1 Ncxe4 15. Bxf6 Nxc3 16. Bxg7 Kxg7 17. h3 Bxf3 18. Bxf3 e4 19. Bd1 Rd8 20. Bc2 Rd2 21. Bb3 Rb2 22. Bd1 Rb1 23. Bg4 Rxf1+ 24. Kxf1 f5 25. Be2 Nxe2 26. Kxe2 Kf6 27. Kd2 Ke5 28. Kc3 f4 0-1

[Event "Pan American-ch Schools U15"]
[Site "Columbia"]
[Date "2009.10.07"]
[Round "2"]
[White "Ossa, Juan Sebastian"]
[Black "Martinez Romero, Martin"]
[Result "0-1"]
[ECO "D96"]
[WhiteElo "1910"]
[BlackElo "2168"]
[PlyCount "45"]
[EventDate "2009.10.07"]
[EventType "rapid"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 132 Extra"]
[Source "ChessBase"]
[SourceDate "2009.11.03"]
[SourceVersion "1"]
[SourceVersionDate "2009.11.03"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Qb3 dxc4 6. Qxc4 0-0 7. Bg5 c6 8. e3 b5 9. Qb3 Be6 10. Qc2 b4 11. Na4 Qa5 12. Bd3 Nbd7 13. 0-0 Rac8 14. Rfc1 Rfd8 15. Nc5 Nxc5 16. Qxc5 Qb6 17. Qxe7 Rd5 18. a3 a5 19. axb4 Re8 20. bxa5 Rxa5 21. Qd6 Bf8 22. Qg3 Nh5 23. Qh4 0-1

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.10"]
[Round "6.1"]
[White "Becerra, Juan David"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2249"]
[BlackElo "1910"]
[PlyCount "45"]
[EventDate "2009.09.08"]
[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 d5 3. exd5 Qxd5 4. d4 Nf6 5. Be3 cxd4 6. cxd4 e6 7. Nc3 Qd8 8. Nf3 Bb4 9. Bd3 0-0 10. 0-0 Nc6 11. Rc1 a6 12. Bb1 Ne7 13. Qd3 Bd7 14. Ne5 Ng6 15. Bg5 Be8 16. Rfd1 Qa5 17. h4 Rd8 18. Nc4 Qc7 19. Bxf6 gxf6 20. h5 Bb5 21. Nxb5 axb5 22. hxg6 bxc4 23. g7 1-0

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.10"]
[Round "7.2"]
[White "Ossa, Juan Sebastian"]
[Black "Lugo Lozano, Luz Adriana"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "1910"]
[BlackElo "1907"]
[PlyCount "72"]
[EventDate "2009.09.08"]
[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 f5 2. d4 d5 3. c4 e6 4. Nc3 Nf6 5. e3 Bd6 6. Be2 0-0 7. Qc2 c6 8. 0-0 Ne4 9. a3 Nd7 10. b4 Ndf6 11. Ne5 a6 12. f4 Bd7 13. c5 Bc7 14. a4 Nxc3 15. Qxc3 Ne4 16. Qb3 Rf6 17. Bf3 Rh6 18. Bxe4 fxe4 19. g3 Be8 20. Bd2 Bh5 21. Bc3 Rf6 22. Rf2 Bxe5 23. dxe5 Rf7 24. b5 axb5 25. a5 Ra6 26. Qb2 Bg4 27. Kf1 Qf8 28. Bb4 Rf5 29. Ke1 Rh5 30. Kd2 Rh3 31. Kc3 Qf5 32. Kd4 h5 33. Rg1 Kf7 34. Qd2 Ke7 35. Qb2 Kd7 36. Qd2 g6 1/2-1/2

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.09"]
[Round "5.3"]
[White "Ossa, Juan Sebastian"]
[Black "Valencia, Adrian David"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "1910"]
[BlackElo "1911"]
[PlyCount "79"]
[EventDate "2009.09.08"]
[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 e6 3. c4 c6 4. Nc3 f5 5. e3 Nf6 6. Be2 Bd6 7. Qc2 Nbd7 8. cxd5 cxd5 9. b3 0-0 10. 0-0 Ne4 11. Nb5 Bb8 12. Ba3 Re8 13. Rac1 Ng5 14. Nxg5 Qxg5 15. Bd6 a6 16. Bxb8 Rxb8 17. Nd6 Rf8 18. Nxc8 Rbxc8 19. Qxc8 Rxc8 20. Rxc8+ Nf8 21. Rfc1 Qe7 22. R1c7 Qb4 23. Rb8 Qd6 24. Rcc8 Kf7 25. Rxf8+ Kg6 26. Rfe8 Qd7 27. Rec8 a5 28. a4 b6 29. Rd8 Qc7 30. Rbc8 Qe7 31. Bb5 Qb4 32. Rc7 Qxb3 33. Rdd7 Qd1+ 34. Bf1 Qxa4 35. Rxg7+ Kh6 36. Rxh7+ Kg6 37. h4 b5 38. h5+ Kg5 39. Rcg7+ Kf6 40. Rg6# 1-0

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.08"]
[Round "3.3"]
[White "Barros, Raul Junior"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2072"]
[BlackElo "1910"]
[PlyCount "47"]
[EventDate "2009.09.08"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 d6 7. Nc3 Qc7 8. a4 b6 9. Qe2 Be7 10. Kh1 0-0 11. f4 Nbd7 12. Bd2 Bb7 13. Rae1 Qc5 14. Nb3 Qh5 15. Rf3 e5 16. Qf1 exf4 17. Bxf4 Ne5 18. Rh3 Qg4 19. Nd4 Ng6 20. Nf5 Bd8 21. Bxd6 Qg5 22. Bxf8 Kxf8 23. Rg3 Ng4 24. Nd6 1-0

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.08"]
[Round "1.2"]
[White "Dominguez, Oscar Alberto"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1755"]
[BlackElo "1910"]
[PlyCount "70"]
[EventDate "2009.09.08"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. 0-0 Bb4 8. Qd3 0-0 9. f4 d6 10. Be3 Nbd7 11. Nb3 Nc5 12. Nxc5 Bxc5 13. Rad1 Bxe3+ 14. Qxe3 Rd8 15. Bf3 Ne8 16. Rd2 Bd7 17. Rfd1 Bc6 18. Ne2 b5 19. Nd4 Bb7 20. c3 Rac8 21. g4 Qb6 22. f5 e5 23. Nc2 Qc7 24. g5 Qc4 25. f6 Qxa2 26. Nb4 Qe6 27. Rg2 Qc4 28. Kh1 a5 29. g6 fxg6 30. f7+ Qxf7 31. Nd5 Nf6 32. Nxf6+ Qxf6 33. Bg4 Rc4 34. Qh3 Rxe4 35. Be6+ Kh8 0-1

[Event "Calima Elite U16/18"]
[Site "Calima"]
[Date "2009.09.08"]
[Round "2.1"]
[White "Ossa, Juan Sebastian"]
[Black "Castro, Natalia Patricia"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "1910"]
[BlackElo "1996"]
[PlyCount "77"]
[EventDate "2009.09.08"]
[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 f5 2. Nf3 Nf6 3. c4 e6 4. Nc3 d5 5. e3 Be7 6. Be2 0-0 7. Ne5 Nbd7 8. 0-0 c6 9. Bd2 Ne4 10. f3 Nxd2 11. Qxd2 Bd6 12. f4 Nf6 13. Rf3 Ne4 14. Nxe4 fxe4 15. Rh3 Bd7 16. Kh1 Qe7 17. Rg1 Be8 18. g4 Rd8 19. Qe1 c5 20. g5 Bxe5 21. dxe5 Bg6 22. Bh5 Bf5 23. Bg4 Bg6 24. Bh5 Bf5 25. Bg4 d4 26. Bxf5 exf5 27. Rxh7 Kf7 28. Qd1 Ke6 29. exd4 Rxd4 30. Qa4 a6 31. Qb3 Rc8 32. Qh3 Rxc4 33. Qh5 Qf7 34. Qd1 Rd4 35. Qb3+ c4 36. Qb6+ Rc6 37. Qxd4 b5 38. Rd1 Qc7 39. Qd5+ 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.17"]
[Round "6"]
[White "Ossa, Juan Sebastian"]
[Black "Gutierrez, Hermides Anibal"]
[Result "1/2-1/2"]
[ECO "D93"]
[WhiteElo "1911"]
[PlyCount "76"]
[EventDate "2009.08.15"]
[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 d5 4. Bf4 c6 5. Nf3 Bg7 6. e3 0-0 7. Qb3 e6 8. Be2 Nbd7 9. 0-0 dxc4 10. Bxc4 Nb6 11. Be2 Nbd5 12. Bg3 Qb6 13. Qxb6 Nxb6 14. Ne5 Nbd7 15. Nxd7 Nxd7 16. Ne4 e5 17. dxe5 Nxe5 18. Rfd1 Be6 19. Nc5 Bc8 20. Rd2 b6 21. Ne4 c5 22. Rad1 Be6 23. b3 h6 24. h3 Nc6 25. Bf3 Rad8 26. Nxc5 Rxd2 27. Rxd2 bxc5 28. Bxc6 Rc8 29. Bb7 Re8 30. Ba6 Bc3 31. Rc2 Bb4 32. Bd6 Bf5 33. Rc1 Re6 34. Rd1 Bc2 35. Rd5 Be4 36. Rd1 Bc2 37. Rd5 Be4 38. Rd1 Bc2 1/2-1/2

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.17"]
[Round "7"]
[White "Tabares Delgado, Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "E67"]
[BlackElo "1911"]
[PlyCount "73"]
[EventDate "2009.08.15"]
[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. g3 Bg7 4. Bg2 0-0 5. Nc3 d6 6. Nf3 c6 7. 0-0 Nbd7 8. Qc2 Qc7 9. Bf4 e5 10. dxe5 dxe5 11. Bd2 Nc5 12. e4 Be6 13. Be3 Ncd7 14. b3 h6 15. Rfd1 Rfd8 16. h3 Nb6 17. Bc5 Bf8 18. Be3 Bg7 19. Bc5 Bf8 20. Be3 Bg7 21. Ne1 Kh7 22. Nd3 Nbd7 23. Rd2 a6 24. Rad1 b5 25. cxb5 cxb5 26. Nd5 Qxc2 27. Rxc2 Bxd5 28. exd5 e4 29. Nb4 Ne5 30. Bb6 Rd7 31. d6 Ne8 32. Bxe4 Rb8 33. Bc5 Rbd8 34. f4 Nxd6 35. Bxd6 Rxd6 36. Rxd6 Rxd6 37. fxe5 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "3"]
[White "Clavijo, Jorge Mario"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "E99"]
[WhiteElo "2364"]
[BlackElo "1911"]
[PlyCount "91"]
[EventDate "2009.08.15"]
[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. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. Bd2 Nf6 12. f3 f4 13. c5 g5 14. cxd6 cxd6 15. Nf2 h5 16. Rc1 Ng6 17. Nb5 Rf7 18. h3 Nh4 19. Qb3 Bf8 20. Rc2 Rg7 21. Be1 g4 22. fxg4 hxg4 23. hxg4 Nxg4 24. Bxg4 Bxg4 25. Nxg4 Rxg4 26. Qh3 Qg5 27. Bxh4 Rxh4 28. Qe6+ Kh8 29. Rf3 Qh5 30. Kf2 Rh1 31. Ke2 Qh4 32. Kd3 Qh6 33. Qd7 Qg6 34. Rh3+ Rxh3+ 35. Qxh3+ Kg8 36. Nc7 Rb8 37. Ne6 Be7 38. Rc7 Kf7 39. Qh4 Qg3+ 40. Qxg3 fxg3 41. Ke2 b5 42. Kf3 b4 43. Rxa7 Rc8 44. Rb7 Rc4 45. Nd8+ Kg6 46. Nc6 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "4"]
[White "Ossa, Juan Sebastian"]
[Black "Ospina, Oscar Alejandro"]
[Result "0-1"]
[ECO "A42"]
[WhiteElo "1911"]
[PlyCount "80"]
[EventDate "2009.08.15"]
[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 g6 2. c4 Bg7 3. Nc3 d6 4. e4 Nc6 5. d5 Nd4 6. Be3 c5 7. Bxd4 Bxd4 8. Nf3 Bg7 9. Bd3 Nf6 10. 0-0 0-0 11. Re1 Nd7 12. a3 Rb8 13. Qc2 a6 14. Rab1 Qa5 15. b4 Qc7 16. bxc5 Qxc5 17. Rb3 Qa5 18. Nb1 Nc5 19. Rb4 Bg4 20. Nfd2 Rfc8 21. Nb3 Qc7 22. Nxc5 Qxc5 23. Nd2 b5 24. Qb1 Bc3 25. Nb3 Qa7 26. Na5 Bxb4 27. axb4 bxc4 28. Bxc4 Bd7 29. Qb3 Qb6 30. Rb1 Rc7 31. h4 Rbc8 32. Qd3 h5 33. Rb2 Bb5 34. Bxb5 Qxb5 35. Qe3 Rc1+ 36. Kh2 R8c3 37. Qf4 Qf1 38. f3 Qh1+ 39. Kg3 R3c2 40. Rxc2 Rxc2 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "5"]
[White "Raigosa, Andrea"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "E85"]
[BlackElo "1911"]
[PlyCount "54"]
[EventDate "2009.08.15"]
[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. e4 d6 5. f3 0-0 6. Be3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Nd5 Nxd5 10. cxd5 c6 11. Bc4 cxd5 12. Bxd5 Nc6 13. a3 Ne7 14. Bg5 Rd7 15. Bb3 h6 16. Be3 Rd3 17. Bc5 Rxb3 18. Bxe7 Rxb2 19. Rd1 Be6 20. Ne2 Rc8 21. Rc1 Rxc1+ 22. Nxc1 Rxg2 23. Ne2 Bc4 24. Nc3 Rc2 25. Nd1 h5 26. Bg5 Re2+ 27. Kf1 Bf8 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.15"]
[Round "2"]
[White "Ossa, Juan Sebastian"]
[Black "Gomez Lenis, Adolfo Leon"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "1911"]
[PlyCount "67"]
[EventDate "2009.08.15"]
[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 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bg5 Be7 6. e3 0-0 7. Be2 d6 8. 0-0 Nbd7 9. Qc2 Rc8 10. Rfd1 h6 11. Bh4 d5 12. Rac1 dxc4 13. Bxc4 Bxf3 14. gxf3 c6 15. Ba6 Nh7 16. Bxe7 Qxe7 17. Bxc8 Rxc8 18. Ne4 Ng5 19. Nxg5 Qxg5+ 20. Kh1 Qh5 21. Qe4 Nf6 22. Qf4 Nd5 23. Qg4 Nf6 24. Qxh5 Nxh5 25. Rc3 Nf6 26. Rdc1 Nd5 27. Rxc6 Rb8 28. Rc8+ Rxc8 29. Rxc8+ Kh7 30. a3 a5 31. Rb8 f5 32. e4 fxe4 33. fxe4 Nf6 34. f3 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.15"]
[Round "1"]
[White "Rivera, Leydi Johana"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B23"]
[BlackElo "1911"]
[PlyCount "48"]
[EventDate "2009.08.15"]
[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. Nc3 e6 3. f4 Nc6 4. Nf3 a6 5. g3 b5 6. Bg2 d5 7. e5 Qb6 8. d3 Nh6 9. 0-0 Be7 10. Ne2 Nf5 11. c3 Bb7 12. d4 cxd4 13. cxd4 Ncxd4 14. Nexd4 Bc5 15. Kh1 Nxd4 16. Be3 Nf5 17. Bxc5 Qxc5 18. Rc1 Qb6 19. Qd3 Ne3 20. Rg1 Ng4 21. Rgf1 Nf2+ 22. Rxf2 Qxf2 23. Qc3 0-0 24. Qd3 h6 0-1

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.23"]
[Round "7"]
[White "Escobar Barona, Juan Fernando"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "1987"]
[BlackElo "1892"]
[PlyCount "73"]
[EventDate "2009.05.21"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. Bf3 Bb4 8. Bd2 0-0 9. 0-0 Bc5 10. Nb3 Ba7 11. Re1 Nc6 12. Be3 Bxe3 13. Rxe3 Ne5 14. Nd2 b5 15. a3 Bb7 16. Be2 d5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. Nf3 Ng4 20. Rc3 Qb6 21. Qd4 Qxd4 22. Nxd4 Nf6 23. Nc6 Rfe8 24. f3 Rac8 25. Ne7+ Rxe7 26. Rxc8+ Ne8 27. Rd1 Kf8 28. c4 bxc4 29. Bxc4 Bb7 30. Rb8 f6 31. Rdd8 Bc6 32. Bxa6 Kf7 33. Bb5 Bxb5 34. Rxb5 Rc7 35. Rbb8 Rc1+ 36. Kf2 Rc2+ 37. Kg3 1-0

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.23"]
[Round "6"]
[White "Ossa, Juan Sebastian"]
[Black "Angulo, Pablo David"]
[Result "1/2-1/2"]
[ECO "D53"]
[WhiteElo "1892"]
[PlyCount "86"]
[EventDate "2009.05.21"]
[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 e6 3. Nc3 d5 4. Nf3 c6 5. Bg5 Be7 6. e3 Nbd7 7. Bd3 dxc4 8. Bxc4 Nd5 9. Bxe7 Qxe7 10. 0-0 N7f6 11. Re1 0-0 12. e4 Nb6 13. Bb3 Rd8 14. Qc2 Bd7 15. Rad1 Be8 16. Ne5 Rac8 17. d5 cxd5 18. exd5 Nbxd5 19. Bxd5 Nxd5 20. Nxd5 exd5 21. Qb3 Qc7 22. Rxd5 Rxd5 23. Qxd5 Qc1 24. Qe4 Qxb2 25. Nc4 Qb5 26. Nd6 Bc6 27. Qe7 Qd5 28. f3 Rf8 29. h4 h6 30. Re2 Qd3 31. Qe5 Bd7 32. Kh2 b6 33. h5 a6 34. Re3 Qc2 35. f4 Qd1 36. Rg3 f6 37. Qe7 Qxh5+ 38. Kg1 Qd1+ 39. Kf2 Qd2+ 40. Kf3 Qd3+ 41. Kf2 Qd2+ 42. Kg1 Qd1+ 43. Kh2 Qh5+ 1/2-1/2

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.22"]
[Round "4"]
[White "Cadena Montoya, Gustavo Adolfo"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "A69"]
[WhiteElo "2007"]
[BlackElo "1892"]
[PlyCount "54"]
[EventDate "2009.05.21"]
[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. e4 d6 5. f4 0-0 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8 10. Nd2 a6 11. a4 b6 12. 0-0 Nbd7 13. Bf3 Rb8 14. Nc4 Qc7 15. e5 dxe5 16. d6 Qd8 17. fxe5 Nxe5 18. Nxe5 Rxe5 19. d7 Nxd7 20. Bf4 Bb7 21. Bxb7 Rxb7 22. Bxe5 Bxe5 23. Qd5 Qh4 24. Qxf7+ Kh8 25. g3 Bd4+ 26. Kh1 Qg4 27. Rae1 Rb8 1-0

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.22"]
[Round "3"]
[White "Ossa, Juan Sebastian"]
[Black "Juez, Jhon Alexander"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1892"]
[BlackElo "2075"]
[PlyCount "57"]
[EventDate "2009.05.21"]
[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. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 c5 7. 0-0 Bg4 8. Be3 cxd4 9. Nxd4 Bxe2 10. Qxe2 Nc6 11. Rfd1 Ne5 12. c5 Neg4 13. cxd6 Qxd6 14. Nf3 Qb4 15. e5 Nxe3 16. exf6 Nxd1 17. fxg7 Rfd8 18. Rxd1 Rxd1+ 19. Nxd1 Rd8 20. Nc3 e5 21. h3 Qf4 22. Qxe5 Qc1+ 23. Kh2 Qxb2 24. Ng5 Qxf2 25. Nce4 Qf5 26. Nf6+ Kxg7 27. Nh5+ Kh6 28. Qxf5 gxf5 29. Nxf7+ 1-0

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.22"]
[Round "5"]
[White "Zapata Arbelaes, Estiven"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B28"]
[WhiteElo "2057"]
[BlackElo "1892"]
[PlyCount "40"]
[EventDate "2009.05.21"]
[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 e6 3. c4 Nc6 4. Nc3 Nf6 5. d4 cxd4 6. Nxd4 a6 7. Be3 g6 8. Nxc6 bxc6 9. e5 Ng8 10. f4 f6 11. c5 Qa5 12. Bc4 Bxc5 13. Bxc5 Qxc5 14. Qe2 fxe5 15. Qxe5 Qxe5+ 16. fxe5 Ne7 17. Ne4 Nf5 18. Kd2 Ke7 19. g4 Nh6 20. h3 Nf7 0-1

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.21"]
[Round "2"]
[White "Hernandez Sanchez, Jairo Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "A08"]
[WhiteElo "2034"]
[BlackElo "1892"]
[PlyCount "61"]
[EventDate "2009.05.21"]
[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 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Qc7 6. Bg2 Bd6 7. 0-0 Nge7 8. Re1 0-0 9. Qe2 Rb8 10. e5 Bxe5 11. Nxe5 Nd4 12. Qd1 f6 13. Nef3 Ndf5 14. c3 e5 15. Qc2 g5 16. h3 h5 17. Nf1 Rf7 18. Ne3 Nh6 19. Nd2 Be6 20. c4 d4 21. Nd5 Qd7 22. Nxe7+ Rxe7 23. Ne4 Rf7 24. Nxc5 Qe7 25. Nxe6 Qxe6 26. Bd5 Qxh3 27. Qe2 Ng4 28. Qf3 Qh2+ 29. Kf1 Qh3+ 30. Qg2 Qxg2+ 31. Kxg2 1-0

[Event "COL-ch U16"]
[Site "Cali"]
[Date "2009.05.21"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Acevedo, Julian Steven"]
[Result "1-0"]
[ECO "D92"]
[WhiteElo "1892"]
[PlyCount "49"]
[EventDate "2009.05.21"]
[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. Nf3 g6 3. c4 Bg7 4. Nc3 d5 5. Bf4 Nh5 6. Nxd5 Nxf4 7. Nxf4 c5 8. e3 Bg4 9. Be2 0-0 10. 0-0 Qb6 11. Nd5 Qd6 12. dxc5 Qxc5 13. Qb3 b6 14. h3 Be6 15. Rfd1 Rc8 16. Ng5 Bxd5 17. Rxd5 Qc7 18. Rad1 e6 19. R5d2 h6 20. Bf3 Nc6 21. Rd7 Qe5 22. Nxf7 Qc5 23. Nd6 Ne5 24. Nxc8 Nxf3+ 25. gxf3 1-0

[Event "COL-ch U20"]
[Site "Bogota"]
[Date "2009.04.06"]
[Round "6.10"]
[White "Ossa, Juan Sebastian"]
[Black "Valle, Leiner Efrain"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "1892"]
[BlackElo "2192"]
[PlyCount "47"]
[EventDate "2009.04.03"]
[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 b6 2. c4 e6 3. Nc3 Bb4 4. Nf3 Bb7 5. Bf4 Nf6 6. e3 d6 7. Be2 0-0 8. 0-0 Nbd7 9. Na4 d5 10. cxd5 Nxd5 11. Bg3 N7f6 12. Bd3 Re8 13. Rc1 Bd6 14. Ne5 a6 15. a3 Rc8 16. Qe2 c5 17. dxc5 Bxe5 18. Bxe5 b5 19. Nb6 Nxb6 20. cxb6 Qd5 21. Qf3 Qxf3 22. gxf3 Nd7 23. Bc7 Bxf3 24. e4 1-0

[Event "COL-ch U20"]
[Site "Bogota"]
[Date "2009.04.05"]
[Round "4.19"]
[White "Ossa, Juan Sebastian"]
[Black "Borbon, Oscar"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "1892"]
[BlackElo "1952"]
[PlyCount "14"]
[EventDate "2009.04.03"]
[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 Nf6 3. c4 e6 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 c5 1-0

[Event "COL-ch U20"]
[Site "Bogota"]
[Date "2009.04.05"]
[Round "5.17"]
[White "Suarez, Walter Camilo"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "E99"]
[WhiteElo "1984"]
[BlackElo "1892"]
[PlyCount "104"]
[EventDate "2009.04.03"]
[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 d6 4. Nc3 Bg7 5. e4 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 f4 12. b4 a5 13. bxa5 Rxa5 14. Bd2 Ra8 15. a4 g5 16. Nb5 h5 17. a5 Ng6 18. Bb4 Nf6 19. Rc1 g4 20. c5 Ra6 21. cxd6 cxd6 22. Nc7 g3 23. Nxa6 bxa6 24. Rc6 Ne8 25. Rxc8 Qxc8 26. h3 Rf7 27. Qd2 Bf8 28. Rc1 Qa8 29. Nb2 Nh4 30. Nc4 Qa7+ 31. Nb6 Rb7 32. Bf1 Nf6 33. Kh1 Rg7 34. Qd3 Qf7 35. Rc8 Kh7 36. Ra8 Ng4 37. Be1 Ne3 38. Qe2 Be7 39. Ra7 Qe8 40. Rxa6 Qb8 41. Ra8 Qb7 42. Bd2 Bg5 43. Rc8 Ng4 44. Rc1 Nf2+ 45. Kg1 Bd8 46. Be1 Nxh3+ 47. Kh1 Ng5 48. Qa6 Qe7 49. Qc8 Ng6 50. Bb4 Rf7 51. Be2 Nf8 52. Nc4 Nge6 0-1

[Event "COL-ch U20"]
[Site "Bogota"]
[Date "2009.04.03"]
[Round "1.9"]
[White "Herrera, Juan Sebastian"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B47"]
[WhiteElo "2144"]
[BlackElo "1892"]
[PlyCount "37"]
[EventDate "2009.04.03"]
[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 e6 3. Nc3 a6 4. Be2 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. 0-0 Nf6 8. Kh1 Bb4 9. Nxc6 dxc6 10. Qd4 c5 11. Qe3 0-0 12. e5 Nd5 13. Nxd5 exd5 14. c3 Ba5 15. Bd3 Re8 16. f4 f6 17. Qf3 fxe5 18. Bxh7+ Kh8 19. Bg6 1-0

[Event "Eje Cafetero Region 3rd"]
[Site "Eje Cafetero"]
[Date "2009.03.22"]
[Round "3.19"]
[White "Ossa, Juan Sebastian"]
[Black "Vanegas, Josue"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1882"]
[BlackElo "1625"]
[PlyCount "36"]
[EventDate "2009.03.21"]
[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 0-0 5. e4 d6 6. Be2 Nbd7 7. 0-0 e5 8. Qc2 c6 9. Rd1 Qc7 10. h3 a6 11. dxe5 dxe5 12. Be3 Re8 13. Rd2 Nf8 14. Rad1 Ne6 15. Na4 Nd7 16. c5 Nf4 17. Bf1 Rb8 18. Nb6 Qd8 1-0

[Event "Eje Cafetero Region 3rd"]
[Site "Eje Cafetero"]
[Date "2009.03.21"]
[Round "2.12"]
[White "Toro, Juan Sebastian"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1668"]
[BlackElo "1882"]
[PlyCount "49"]
[EventDate "2009.03.21"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be2 Bb4 8. Qc2 Qe5 9. Nf3 Bxc3+ 10. bxc3 Qxe4 11. Qd2 0-0 12. Ba3 Re8 13. Bd6 Qc6 14. Ne5 Qxg2 15. Bf3 Qh3 16. 0-0-0 Nc6 17. Bxc6 bxc6 18. Rhg1 Ne4 19. Rxg7+ Kh8 20. Rdg1 Nxd6 21. Qxd6 Qh6+ 22. Qd2 Qxg7 23. Rxg7 Kxg7 24. Qg5+ Kf8 25. Qf6 1-0

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.15"]
[Round "6"]
[White "Ossa, Juan Sebastian"]
[Black "Dominguez, Oscar Alberto"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "1882"]
[BlackElo "1720"]
[PlyCount "36"]
[EventDate "2009.03.13"]
[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. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 Nc6 8. d5 Ne7 9. b4 Nh5 10. Nd2 Nf4 11. Bf3 f5 12. a4 g5 13. exf5 Nxf5 14. Nb3 e4 15. Nxe4 Bxa1 16. Nxa1 Nh4 17. Bb2 Nxf3+ 18. Qxf3 Nh3+ 0-1

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.15"]
[Round "7"]
[White "Zuleta, Juan Esteban"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B82"]
[BlackElo "1882"]
[PlyCount "38"]
[EventDate "2009.03.13"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. f4 d6 7. Be3 Nf6 8. Qd2 b5 9. 0-0-0 Nbd7 10. g3 b4 11. Na4 Qa5 12. b3 Nxe4 13. Nc6 Qc7 14. Qxb4 Qxc6 15. Bg2 d5 16. Qd4 Ba3+ 17. Kb1 0-0 18. c4 Ndf6 19. Nb6 Bc5 0-1

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.14"]
[Round "3"]
[White "Narvaez, Zamir Alexis"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2111"]
[BlackElo "1882"]
[PlyCount "47"]
[EventDate "2009.03.13"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. 0-0 Qc7 7. Qe2 d6 8. c4 g6 9. Nc3 Bg7 10. Be3 0-0 11. Rfd1 Nbd7 12. Rac1 b6 13. f4 Bb7 14. Kh1 Rfe8 15. Bb1 Nc5 16. Bg1 e5 17. fxe5 Rxe5 18. Nf3 Re7 19. Nd5 Bxd5 20. cxd5 Qb7 21. Bxc5 bxc5 22. e5 Rb8 23. Qc4 Qxb2 24. exf6 1-0

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.14"]
[Round "4"]
[White "Ossa, Juan Sebastian"]
[Black "Victoria Puerta, Sebastian"]
[Result "1-0"]
[ECO "A58"]
[WhiteElo "1882"]
[PlyCount "59"]
[EventDate "2009.03.13"]
[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. Nf3 g6 3. c4 c5 4. d5 b5 5. cxb5 a6 6. bxa6 Bxa6 7. g3 d6 8. Bg2 Bg7 9. 0-0 0-0 10. Nc3 Nbd7 11. Bf4 Rb8 12. Qd2 Qb6 13. Rab1 Ng4 14. b3 Bxc3 15. Qxc3 Bxe2 16. Rfe1 Bxf3 17. Bxf3 Nge5 18. Bg2 f6 19. Bh6 Rf7 20. Bh3 Qb4 21. Qxb4 Rxb4 22. Re3 Ng4 23. Bxg4 Rxg4 24. Rbe1 Rd4 25. Rxe7 Rxd5 26. Re8+ Nf8 27. R1e7 Re5 28. Rxe5 fxe5 29. a4 g5 30. a5 1-0

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.14"]
[Round "5"]
[White "Sanahuano, Gabriel Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[BlackElo "1882"]
[PlyCount "74"]
[EventDate "2009.03.13"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Bb4 7. Qd3 Nf6 8. 0-0 0-0 9. f4 d6 10. Kh1 b5 11. Bf3 Bb7 12. f5 e5 13. Nde2 Rd8 14. Nd5 Bxd5 15. exd5 Nbd7 16. g4 e4 17. Bxe4 Nc5 18. Qd4 Nfxe4 19. Qxb4 Qb7 20. Nf4 Re8 21. Qd4 Re5 22. Be3 Rae8 23. Rf3 Nf6 24. Rd1 Qe7 25. g5 Ng4 26. f6 Qd7 27. Ng2 Ne4 28. Rdf1 Nxe3 29. Nxe3 Rxg5 30. fxg7 Rh5 31. Nf5 Re5 32. Ng3 Nxg3+ 33. Rxg3 Rxd5 34. Qb6 Qe8 35. Qxa6 Rd2 36. Rg2 Rxg2 37. Kxg2 Qe2+ 0-1

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.13"]
[Round "1"]
[White "Ossa, Juan Sebastian"]
[Black "Parra Meza, Brayan"]
[Result "1-0"]
[ECO "D51"]
[WhiteElo "1882"]
[PlyCount "63"]
[EventDate "2009.03.13"]
[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. Nf3 Nf6 3. c4 e6 4. Nc3 Nbd7 5. Bg5 Be7 6. e3 0-0 7. Bd3 c6 8. 0-0 b6 9. Rc1 Bb7 10. cxd5 cxd5 11. Nb5 Ba6 12. Qa4 Bxb5 13. Bxb5 h6 14. Bf4 Kh8 15. Bc7 Qc8 16. Ba6 Qe8 17. Bb7 Rg8 18. Bxa8 Qxa8 19. Ne5 Nxe5 20. Bxe5 Ne4 21. Rc7 Bf6 22. Rxa7 Qf8 23. Rc1 Ng5 24. Rcc7 Bxe5 25. dxe5 f6 26. h4 Ne4 27. Rf7 Qd8 28. f3 Ng3 29. Qg4 Nf5 30. exf6 b5 31. Qg6 b4 32. fxg7+ 1-0

[Event "Valle U16"]
[Site "Jamundi"]
[Date "2009.03.13"]
[Round "2"]
[White "Valencia, Julian David"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "E61"]
[BlackElo "1882"]
[PlyCount "42"]
[EventDate "2009.03.13"]
[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 0-0 5. e3 d6 6. Qc2 Nbd7 7. b3 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Bd3 e4 11. Be2 Qe7 12. Bb2 c6 13. 0-0 Rd8 14. Rad1 Bg4 15. Bxg4 Nxg4 16. Ne2 Rxd1 17. Rxd1 Qh4 18. Ng3 Qxh2+ 19. Kf1 Qxg3 20. Bxg7 Kxg7 21. Rd4 Qh4 0-1

[Event "Bogota School U15"]
[Site "Bogota"]
[Date "2009.02.21"]
[Round "6.5"]
[White "Ossa, Juan Sebastian"]
[Black "Pardo, Javier Andres"]
[Result "0-1"]
[ECO "E13"]
[WhiteElo "1882"]
[BlackElo "1989"]
[PlyCount "102"]
[EventDate "2009.02.19"]
[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 e6 3. c4 b6 4. Nc3 Bb4 5. Bg5 h6 6. Bh4 Bb7 7. a3 Bxc3+ 8. bxc3 d6 9. e3 Nbd7 10. Be2 c5 11. 0-0 g5 12. Bg3 Ne4 13. Qc2 h5 14. d5 exd5 15. cxd5 f5 16. h3 Bxd5 17. Rad1 Ndf6 18. Bb5+ Kf8 19. c4 Nxg3 20. fxg3 Be4 21. Qd2 Rg8 22. Qxd6+ Qxd6 23. Rxd6 Ke7 24. Rfd1 g4 25. Ne5 gxh3 26. Bc6 Rxg3 27. Bxa8 Rxg2+ 28. Kh1 Bxa8 29. Nc6+ Bxc6 30. Rxf6 Rd2+ 31. Rxc6 Rxd1+ 32. Kh2 Rd3 33. Kxh3 Rxe3+ 34. Kh4 Rxa3 35. Kxh5 f4 36. Kg4 f3 37. Kg3 Kd7 38. Rf6 Kc7 39. Kf2 a5 40. Ke1 a4 41. Rf4 Rb3 42. Kd2 a3 43. Kc2 Rb2+ 44. Kc3 f2 45. Rf6 Re2 46. Rf7+ Kd6 47. Rf6+ Ke5 48. Rf8 Ke4 49. Re8+ Kf3 50. Rf8+ Kg2 51. Rg8+ Kf1 0-1

[Event "Bogota School U15"]
[Site "Bogota"]
[Date "2009.02.20"]
[Round "5.2"]
[White "Camargo, Santiago"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2079"]
[BlackElo "1882"]
[PlyCount "39"]
[EventDate "2009.02.19"]
[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 e6 3. d3 d5 4. g3 Nf6 5. Nbd2 Nc6 6. Bg2 Be7 7. 0-0 0-0 8. Re1 dxe4 9. dxe4 e5 10. Nc4 Qxd1 11. Rxd1 Nxe4 12. Nfxe5 Nxe5 13. Nxe5 Nf6 14. Bg5 Bf5 15. Bxb7 Rab8 16. Bg2 Rxb2 17. Nc6 Re8 18. Nxe7+ Rxe7 19. Rd8+ Re8 20. Bxf6 1-0

[Event "Bogota School U15"]
[Site "Bogota"]
[Date "2009.02.19"]
[Round "7.8"]
[White "Lopez R, Juan David"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B43"]
[BlackElo "1882"]
[PlyCount "59"]
[EventDate "2009.02.19"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 Bb4 8. Bd2 0-0 9. 0-0 Nc6 10. Nf3 b5 11. a4 bxa4 12. Nxa4 Bxd2 13. Qxd2 d5 14. exd5 Nxd5 15. Nc5 Qb6 16. Nb3 Bb7 17. Nfd4 Nxd4 18. Nxd4 Rfc8 19. Nb3 Nb4 20. Ra3 Qc6 21. f3 Nxc2 22. Na5 Qb6+ 23. Kh1 Nxa3 24. bxa3 Rd8 25. Nxb7 Qxb7 26. Qc2 Rac8 27. Bxh7+ Kh8 28. Qe4 Qb5 29. Rb1 Rd4 30. Qxd4 1-0

[Event "Bogota School U15"]
[Site "Bogota"]
[Date "2009.02.19"]
[Round "2.7"]
[White "Ossa, Juan Sebastian"]
[Black "Monsalve, Adriana"]
[Result "1-0"]
[ECO "D52"]
[WhiteElo "1882"]
[BlackElo "2027"]
[PlyCount "71"]
[EventDate "2009.02.19"]
[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 Nf6 3. c4 e6 4. Nc3 c6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2 0-0 9. Nb3 Bxc3+ 10. bxc3 Qc7 11. Bd3 dxc4 12. Bxc4 b6 13. 0-0 c5 14. Rfc1 cxd4 15. cxd4 Bb7 16. Qe2 Qd6 17. Ba6 Bxa6 18. Qxa6 Ng4 19. Bf4 e5 20. dxe5 Ndxe5 21. h3 Nf6 22. Nd4 Qe7 23. Nc6 Nxc6 24. Rxc6 Ne4 25. Rc7 Qh4 26. Qe2 Nc5 27. Bd6 Qd8 28. Rd1 Re8 29. Qh5 Qf6 30. Bxc5 bxc5 31. Qxc5 Qb6 32. Qc4 Qe6 33. Qxe6 Rxe6 34. Rdd7 Rf6 35. Rxa7 Rxa7 36. Rd8# 1-0

[Event "Bogota School U15"]
[Site "Bogota"]
[Date "2009.02.19"]
[Round "1.12"]
[White "Torres Rojas, Yuber Andres"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2057"]
[BlackElo "1882"]
[PlyCount "49"]
[EventDate "2009.02.19"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 Bb4 7. Nde2 Nf6 8. Bg2 Nc6 9. 0-0 Be7 10. Bf4 d6 11. e5 Nxe5 12. Bxe5 dxe5 13. Qd3 0-0 14. Rad1 Bd7 15. Ne4 Bc6 16. N2c3 Nxe4 17. Bxe4 Rfd8 18. Qe3 Bxe4 19. Qxe4 Bf6 20. Ne2 b5 21. Rd3 Rac8 22. Rfd1 Rxd3 23. Rxd3 Qxc2 24. Kg2 Qxb2 25. Qb7 0-1

[Event "Armenia Nal Colegial A"]
[Site "Armenia"]
[Date "2008.10.30"]
[Round "3.2"]
[White "Ossa, Juan Sebastian"]
[Black "Valencia Gantiva, Cristian"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "1864"]
[BlackElo "2035"]
[PlyCount "82"]
[EventDate "2008.10.01"]
[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. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. e4 0-0 6. Be2 e5 7. 0-0 Nbd7 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Bg5 Be6 11. Qb3 b6 12. Rfd1 Qe8 13. Qc2 Qc6 14. Nd5 Bxd5 15. exd5 Qd6 16. Bf3 Rfe8 17. Rab1 a5 18. b3 Rad8 19. Rd2 Qc5 20. Be3 Qe7 21. Re1 e4 22. Bf4 Qb4 23. Bxe4 Nh5 24. Bxc7 Rd7 25. d6 Bc3 26. a3 Bxd2 27. axb4 Bxe1 28. g4 Nf4 29. Bc6 Bxb4 30. h4 Re2 31. Qc1 Rxd6 32. Bxd6 Bxd6 33. Kf1 Nd3 34. Qg5 Rxf2+ 35. Kg1 Bc5 36. Qd8+ Kg7 37. Kh1 Rd2 38. Qc7 Nf2+ 39. Kg2 Nxg4+ 40. Kf3 Rf2+ 41. Ke4 Nf6+ 0-1

[Event "Armenia Nal Colegial A"]
[Site "Armenia"]
[Date "2008.10.30"]
[Round "2.5"]
[White "Vega Paez, Carlos"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B30"]
[BlackElo "1864"]
[PlyCount "60"]
[EventDate "2008.10.01"]
[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 e6 3. Nc3 a6 4. a3 Nc6 5. Bc4 Nf6 6. h3 b5 7. Ba2 b4 8. axb4 cxb4 9. e5 bxc3 10. exf6 cxd2+ 11. Bxd2 Qxf6 12. c3 Bb7 13. 0-0 Bc5 14. Bg5 Qg6 15. Bb1 Qh5 16. Qb3 Rb8 17. Re1 0-0 18. Qc2 f5 19. Qd2 h6 20. Bf4 Rbd8 21. b4 Bb6 22. Bd3 Ra8 23. Rad1 Rf6 24. Be2 Rd8 25. Bg3 g5 26. Ne5 Qe8 27. Nxd7 Rf7 28. Bh5 Rfxd7 29. Qxd7 Qxd7 30. Rxd7 Rxd7 0-1

[Event "Armenia Nal Colegial A"]
[Site "Armenia"]
[Date "2008.10.29"]
[Round "1.5"]
[White "Ossa, Juan Sebastian"]
[Black "Cardenas, Joan Sebastian"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "1864"]
[PlyCount "57"]
[EventDate "2008.10.01"]
[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 d5 2. Nf3 Nc6 3. c4 e6 4. Nc3 Nf6 5. Bg5 Be7 6. e3 h6 7. Bh4 g5 8. Bg3 Nh5 9. Bd3 Nxg3 10. hxg3 f5 11. cxd5 exd5 12. Qb3 Bb4 13. 0-0-0 Bxc3 14. Qxc3 Qf6 15. Rh5 Be6 16. Rdh1 0-0-0 17. Ne5 Nxe5 18. dxe5 Qf8 19. Qa5 Kb8 20. Kb1 f4 21. exf4 gxf4 22. Rc1 Qf7 23. Rh4 fxg3 24. Ra4 a6 25. Bxa6 Bf5+ 26. Ka1 b6 27. Qc3 Qd7 28. Bb5 Qg7 29. Qc6 1-0

[Event "Armenia Nal Colegial A"]
[Site "Armenia"]
[Date "2008.10.01"]
[Round "4.4"]
[White "Martinez, Diego1111"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[BlackElo "1864"]
[PlyCount "72"]
[EventDate "2008.10.01"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Bb4 7. Bd2 Nf6 8. f3 0-0 9. 0-0 Bc5 10. Be3 e5 11. Nf5 g6 12. Nh6+ Kg7 13. Qd2 Bxe3+ 14. Qxe3 Nc6 15. Qg5 Nd4 16. Bd3 Qb6 17. Kh1 Qxb2 18. Nd5 Nxd5 19. exd5 d6 20. Ng4 Bxg4 21. fxg4 Qa3 22. h4 f6 23. Qd2 Rac8 24. Qf2 Qc5 25. Be4 Nxc2 26. Bxc2 Qxc2 27. Qb6 Qc7 28. Qe3 Qc5 29. Qf3 Qa5 30. h5 Rc2 31. Rab1 b5 32. h6+ Kg8 33. Qe3 Qd2 34. Qh3 Rxa2 35. Rbc1 Rc2 36. Ra1 a5 0-1

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.27"]
[Round "6.6"]
[White "Ossa, Juan Sebastian"]
[Black "Escobar Barona, Juan Fernando"]
[Result "1/2-1/2"]
[ECO "D18"]
[WhiteElo "1763"]
[BlackElo "2054"]
[PlyCount "121"]
[EventDate "2008.04.24"]
[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 Nf6 3. c4 c6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Nbd7 8. 0-0 Nb6 9. Bb3 Bb4 10. h3 0-0 11. Nh4 Ne4 12. Nxf5 Nxc3 13. bxc3 Bxc3 14. Rb1 exf5 15. Qc2 Bb4 16. Qxf5 Be7 17. Bc2 g6 18. Qg4 Qc7 19. e4 Rad8 20. Bh6 Rfe8 21. e5 Qd7 22. Qg3 Qxd4 23. a5 Nc4 24. Rfd1 Qxe5 25. Qxe5 Nxe5 26. Rxb7 Bc5 27. Rxd8 Rxd8 28. Bb3 Bf8 29. Bg5 Rd7 30. Rb8 Kg7 31. a6 Bc5 32. Bf4 Bd6 33. Rc8 Rc7 34. Rxc7 Bxc7 35. Be3 Bb8 36. Bd4 f6 37. Bc5 Nd7 38. Be7 Nb6 39. h4 f5 40. Kf1 h6 41. Ke2 Nd5 42. Bc5 Kf7 43. Kd3 Ke6 44. g3 Kd7 45. Kd4 Nc7 46. Bc4 Ne6+ 47. Bxe6+ Kxe6 48. f3 Bxg3 49. Kc4 Bb8 50. Bf8 h5 51. Kc5 Kd7 52. Kc4 Bd6 53. Bh6 c5 54. Kb5 Kc7 55. Be3 Kd7 56. Bxc5 Bxc5 57. Kxc5 Kc7 58. f4 Kd7 59. Kd5 Kc7 60. Kc5 Kd7 61. Kd5 1/2-1/2

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.27"]
[Round "7.4"]
[White "Ruiz Castillo, Joshua Daniel"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2229"]
[BlackElo "1763"]
[PlyCount "62"]
[EventDate "2008.04.24"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. 0-0 Nc6 8. Nb3 Be7 9. a4 d6 10. Be3 Ne5 11. a5 Ned7 12. Kh1 0-0 13. f4 Re8 14. Na4 e5 15. fxe5 dxe5 16. Nd2 Nc5 17. Nb6 Rb8 18. Ra3 Nxd3 19. Rxd3 Bg4 20. Qc1 Bb4 21. Rxf6 gxf6 22. Nd5 Qd6 23. Nc4 Qe6 24. Qf1 Be7 25. Bd2 Kh8 26. Rg3 Rg8 27. Qf2 Bh5 28. Rh3 Bg6 29. Qh4 Bd8 30. Nce3 f5 31. exf5 Bxf5 0-1

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.26"]
[Round "4.13"]
[White "Ossa, Juan Sebastian"]
[Black "Valencia, Adrian David"]
[Result "0-1"]
[ECO "A90"]
[WhiteElo "1763"]
[BlackElo "1971"]
[PlyCount "97"]
[EventDate "2008.04.24"]
[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 e6 3. c4 c6 4. Nc3 f5 5. g3 Nf6 6. Bg2 Bd6 7. 0-0 0-0 8. cxd5 exd5 9. a3 Be6 10. b4 Ne4 11. Qc2 Nd7 12. Rb1 Nb6 13. Qb3 Nxc3 14. Qxc3 Nc4 15. Qb3 Qd7 16. a4 Rab8 17. Nd2 f4 18. Nxc4 dxc4 19. Qc3 fxg3 20. hxg3 a6 21. Be3 Rbe8 22. Rfd1 Bd5 23. Rb2 Qe6 24. Bc1 Qg4 25. Qe1 c3 26. Qxc3 Rxe2 27. Bxd5+ cxd5 28. Rxe2 Qxe2 29. Rf1 h6 30. Qb3 Qe4 31. Qc3 Rf3 32. Qc8+ Kh7 33. Qh3 Qxd4 34. Be3 Qxb4 35. Qe6 Rf6 36. Qxd5 Qxa4 37. Qxb7 Qc4 38. Qb1+ Rg6 39. Rc1 Qd5 40. Rd1 Qe6 41. Qd3 a5 42. Rb1 Kg8 43. Rb6 Rf6 44. Kg2 Qe7 45. Qb1 Bc7 46. Rb7 Qd6 47. Ra7 Qc6+ 48. Kg1 Qf3 49. Rxc7 0-1

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.26"]
[Round "5.8"]
[White "Valencia Gantiva, Cristian"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2070"]
[BlackElo "1763"]
[PlyCount "76"]
[EventDate "2008.04.24"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. Bg5 Bb4 8. Qd2 Nc6 9. Nxc6 bxc6 10. a3 Ba5 11. b4 Bb6 12. Na4 Bd4 13. c3 Ba7 14. h3 h6 15. Bh4 Nh5 16. g4 Nf4 17. Bg3 e5 18. Rd1 Ng2+ 19. Kf1 Nf4 20. Bc4 0-0 21. Qd6 Bb8 22. Qxc7 Bxc7 23. Bxf4 exf4 24. Kg2 a5 25. Nc5 d6 26. Nd3 axb4 27. axb4 Ra3 28. Rc1 Bb7 29. Kf1 d5 30. exd5 cxd5 31. Bb5 d4 32. Rg1 dxc3 33. Nc5 Bd5 34. Ke2 Rb8 35. Na4 Rxb5 36. Nxc3 Bc4+ 37. Kd2 Rxb4 38. Nd1 Ba5 0-1

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.25"]
[Round "3.7"]
[White "Barros, Raul Junior"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "2061"]
[BlackElo "1763"]
[PlyCount "77"]
[EventDate "2008.04.24"]
[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 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Bb4 7. Bd2 Nf6 8. Bd3 Nc6 9. Nxc6 bxc6 10. 0-0 0-0 11. Qe2 d5 12. e5 Nd7 13. Rae1 c5 14. Qh5 g6 15. Qh4 d4 16. Be4 Rb8 17. Nb1 Bxd2 18. Nxd2 Rxb2 19. f4 Rxa2 20. Rf3 Qd8 21. Qh6 f5 22. Bd3 Nb6 23. Rh3 Rf7 24. Nf3 Qc7 25. Ng5 Rg7 26. Nxh7 Rxh7 27. Qxg6+ Qg7 28. Qe8+ Qf8 29. Qxf8+ Kxf8 30. Rxh7 c4 31. Bxc4 Rxc2 32. Bd3 Rd2 33. Rb1 Nd5 34. Rb8 Ne7 35. Bxa6 Rc2 36. Bxc8 Nxc8 37. Rxc8+ Rxc8 38. Rh8+ Ke7 39. Rxc8 1-0

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.25"]
[Round "2.10"]
[White "Ossa, Juan Sebastian"]
[Black "Posada, Juan Manuel"]
[Result "1-0"]
[ECO "E97"]
[WhiteElo "1763"]
[BlackElo "2110"]
[PlyCount "55"]
[EventDate "2008.04.24"]
[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 0-0 5. e4 d6 6. Be2 Nbd7 7. 0-0 e5 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qxd8 Rxd8 11. Bg5 h6 12. Bxf6 Bxf6 13. Nd5 Bg5 14. Nxc7 Rb8 15. Nd5 Be6 16. Rfd1 Rbc8 17. b3 f5 18. Bf3 b5 19. cxb5 Rc5 20. Nb4 Rxd1+ 21. Rxd1 Rxb5 22. Nc6 a5 23. Rd6 Rc5 24. h4 Bxh4 25. Rxe6 Rc1+ 26. Kh2 Bxf2 27. Rxg6+ Kh7 28. exf5 1-0

[Event "COL-ch U14"]
[Site "Medellin"]
[Date "2008.04.24"]
[Round "1.3"]
[White "Jimenez, Luis Felipe"]
[Black "Ossa, Juan Sebastian"]
[Result "1/2-1/2"]
[ECO "E87"]
[WhiteElo "2138"]
[BlackElo "1763"]
[PlyCount "49"]
[EventDate "2008.04.24"]
[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. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 e5 7. d5 Nh5 8. g4 Nf4 9. Bxf4 exf4 10. Qd2 Qh4+ 11. Qf2 Qxf2+ 12. Kxf2 Nd7 13. Nge2 Be5 14. Rd1 a6 15. h4 h6 16. h5 g5 17. Nd4 Bxd4+ 18. Rxd4 Ne5 19. Be2 Bd7 20. a4 Rfb8 21. Rc1 Be8 22. b4 b6 23. Rd2 Kg7 24. Rdc2 a5 25. b5 1/2-1/2

[Event "Bogota Olympic qual 1st"]
[Site "Bogota"]
[Date "2008.03.24"]
[Round "9.54"]
[White "Suarez, Walter Camilo"]
[Black "Ossa, Juan Sebastian"]
[Result "1-0"]
[ECO "E87"]
[BlackElo "1734"]
[PlyCount "73"]
[EventDate "2008.03.20"]
[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. f3 0-0 6. Be3 e5 7. d5 Nh5 8. Nge2 f5 9. Qd2 f4 10. Bf2 a6 11. 0-0-0 Bd7 12. c5 Qe7 13. b4 Rc8 14. Kb2 Qe8 15. Nc1 Bf8 16. Nb3 Kh8 17. Bd3 Ba4 18. Nxa4 Qxa4 19. Rc1 Qe8 20. Ka1 Nd7 21. c6 bxc6 22. Rxc6 Nb8 23. Rc2 Nd7 24. Rhc1 Qd8 25. Na5 Ndf6 26. Qe2 Qd7 27. Nc6 Bg7 28. Rc3 Rf8 29. Ra3 Nxd5 30. Rxa6 Rxa6 31. Bxa6 Nb6 32. Qb5 d5 33. Rd1 Qf7 34. Bxb6 cxb6 35. Qxd5 Qf6 36. Bc4 Qg5 37. Nd8 1-0

[Event "Pan American-ch U14"]
[Site "Medellin"]
[Date "2007.07.07"]
[Round "9"]
[White "Juez, Jose Yesid"]
[Black "Ossa, Juan Sebastian"]
[Result "0-1"]
[ECO "B46"]
[BlackElo "1739"]
[PlyCount "82"]
[EventDate "2007.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 Nf6 7. 0-0 Nc6 8. Nxc6 bxc6 9. f4 d6 10. Qf3 Bb7 11. Be3 d5 12. e5 Nd7 13. Qg4 c5 14. Bd2 d4 15. Ne4 c4 16. Nd6+ Bxd6 17. exd6 Qxd6 18. Bxc4 Nf6 19. Qe2 0-0 20. Rae1 Rfe8 21. Bd3 Qd5 22. c3 Rad8 23. Rf3 Qc5 24. Rg3 dxc3+ 25. Be3 Qd6 26. Rd1 Ne4 27. Rh3 cxb2 28. Qxb2 Qc6 29. Rc1 Rxd3 30. Ba7 Red8 31. Rxd3 Rxd3 32. h3 Rd2 33. Qxd2 Nxd2 34. Rxc6 Bxc6 35. Kf2 Kf8 36. g4 Ke7 37. Ke3 Ne4 38. g5 Kd6 39. h4 Kd5 40. Bd4 Nd6 41. Kd3 Bb5+ 0-1

[Event "Pan American-ch U14"]
[Site "Medellin"]
[Date "2007.07.06"]
[Round "8"]
[White "Ossa, Juan Sebastian"]
[Black "Raventos Khnor, Jose Manuel"]
[Result "1-0"]
[ECO "A58"]
[WhiteElo "1739"]
[PlyCount "81"]
[EventDate "2007.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 c5 4. d5 b5 5. cxb5 a6 6. bxa6 Bxa6 7. e3 Bxf1 8. Kxf1 d6 9. g3 Bg7 10. Kg2 0-0 11. Nc3 Nbd7 12. Re1 Qb6 13. Qc2 Rfb8 14. e4 Ne8 15. b3 Nc7 16. Na4 Qb4 17. Bd2 Qa3 18. Bc1 Qb4 19. Bd2 Qb5 20. Bc3 Bxc3 21. Nxc3 Qb4 22. Qd3 Nb5 23. Nxb5 Rxb5 24. e5 Rba5 25. exd6 exd6 26. Re7 Nf8 27. Ng5 R8a7 28. Qe3 f6 29. Nf7 Qb8 30. Nh6+ Kh8 31. Re8 Rb5 32. Rxb8 Rxb8 33. Qc3 Kg7 34. Ng4 Rf7 35. Re1 Rbb7 36. a4 h5 37. Ne3 Rfe7 38. Nc4 Red7 39. a5 Ra7 40. Re8 Nh7 41. Nb6 1-0

[Event "Pan American-ch U14"]
[Site "Medellin"]
[Date "2007.07.05"]
[Round "7"]
[White "Maglieri, Nahuel"]
[Black "Ossa, Juan Sebastian"]
[Result "1/2-1/2"]
[ECO "A26"]
[BlackElo "1739"]
[PlyCount "61"]
[EventDate "2007.07.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 0-0 5. d3 d6 6. e4 e5 7. Nge2 Nc6 8. 0-0 Nd7 9. Be3 f5 10. Qd2 Nc5 11. Bxc5 dxc5 12. exf5 gxf5 13. Bd5+ Kh8 14. Bxc6 bxc6 15. f3 f4 16. Ne4 Bh3 17. Rf2 Bh6 18. gxf4 Qh4 19. Qc3 Rg8+ 20. N4g3 Bxf4 21. Nxf4 Qxf4 22. Qd2 Rg5 23. Kh1 Rag8 24. Rg1 Qd4 25. Re1 Qf4 26. Rg1 Qd4 27. Re1 Qf4 28. Rg1 Qd4 29. Re1 Qf4 30. Rg1 Qd4 31. Re1 1/2-1/2

