[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.27"]
[Round "11"]
[White "Sierra, Hernando"]
[Black "Arismendi Polanco, Efrain Steven"]
[Result "1-0"]
[ECO "B72"]
[PlyCount "62"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bd3 Bg7 7. Be3 0-0 8. Qd2 Nc6 9. h4 Ng4 10. Nb3 Nxe3 11. Qxe3 Be6 12. 0-0-0 Rc8 13. h5 Qd7 14. hxg6 hxg6 15. Rh2 a5 16. Rdh1 a4 17. Rh7 axb3 18. Rxg7+ Kxg7 19. Qh6+ Kf6 20. e5+ Kxe5 21. Re1+ Kf6 22. Ne4+ Ke5 23. g3 Nd4 24. Qg5+ Nf5 25. Nf6+ Kd4 26. Qf4+ Kc5 27. Nxd7+ Bxd7 28. Qc4+ Kb6 29. Qxb3+ Kc7 30. Bxf5 Bxf5 31. Rxe7+ Bd7 1-0

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.26"]
[Round "10"]
[White "Montoya, Nerio Antonio"]
[Black "Sierra, Hernando"]
[Result "1-0"]
[ECO "C30"]
[PlyCount "39"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 e5 2. f4 d6 3. Nf3 Nc6 4. Bc4 Bg4 5. 0-0 Nd4 6. Bxf7+ Kd7 7. Nxe5+ dxe5 8. Qxg4+ Kc6 9. Bd5+ Kb6 10. Na3 Bc5 11. Kh1 Nf6 12. Qd1 Nxd5 13. exd5 Qxd5 14. c3 Ne6 15. b4 Bd6 16. c4 Qc6 17. c5+ Nxc5 18. bxc5+ Bxc5 19. Rb1+ Ka6 20. Qe2+ 1-0

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.26"]
[Round "9"]
[White "Sierra, Hernando"]
[Black "Petro, Manuel"]
[Result "1-0"]
[ECO "C02"]
[PlyCount "46"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[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. Nf3 Nc6 5. c3 Qb6 6. Be2 cxd4 7. cxd4 Bb4+ 8. Nc3 Nge7 9. 0-0 Nf5 10. Be3 0-0 11. Bd3 Bd7 12. Rc1 Bxc3 13. bxc3 Na5 14. Qc2 Qd8 15. g4 Nxe3 16. Bxh7+ Kh8 17. fxe3 Be8 18. Bd3 g6 19. Qg2 Kg7 20. h4 Rg8 21. Ng5 Rc8 22. Bxg6 Kxg6 23. Qc2+ Kg7 1-0

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.25"]
[Round "8"]
[White "Rios Franco, Sergio Alejandro"]
[Black "Sierra, Hernando"]
[Result "0-1"]
[ECO "C48"]
[PlyCount "40"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Bc5 4. 0-0 d6 5. h3 Nf6 6. Nc3 0-0 7. d3 Nd4 8. Nxd4 Bxd4 9. Be3 c6 10. Bc4 d5 11. exd5 cxd5 12. Bb3 Be6 13. Bxd4 exd4 14. Ne2 Qd7 15. Nf4 Rfe8 16. Nxe6 Rxe6 17. Re1 Rae8 18. Qd2 Qe7 19. Rxe6 fxe6 20. Re1 Qc5 0-1

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.25"]
[Round "7"]
[White "Sierra, Hernando"]
[Black "Pelaez, Hernan"]
[Result "0-1"]
[ECO "B30"]
[BlackElo "1928"]
[PlyCount "54"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 g6 2. Nc3 c5 3. Nf3 Nc6 4. Bc4 Bg7 5. 0-0 Nh6 6. d3 0-0 7. e5 Nf5 8. Bf4 e6 9. Ne4 d5 10. exd6 Bxb2 11. Rb1 Bg7 12. Nxc5 Nxd6 13. Bxd6 Qxd6 14. Ne4 Qe7 15. d4 Rd8 16. c3 b6 17. Qa4 Bb7 18. Bb5 Na5 19. Ned2 Rac8 20. Rfc1 Qc7 21. Qd1 Qf4 22. Be2 e5 23. dxe5 Bxf3 24. Bxf3 Rxd2 25. Qe1 Nc4 26. Rb4 Rcd8 27. Be2 Rxe2 0-1

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.24"]
[Round "5"]
[White "Ospina, Jorge Albeiro"]
[Black "Sierra, Hernando"]
[Result "0-1"]
[ECO "A00"]
[PlyCount "42"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e3 d5 2. c3 e5 3. d3 Nf6 4. Ne2 Nc6 5. Ng3 Bd6 6. Be2 0-0 7. 0-0 e4 8. Nh5 Nxh5 9. Bxh5 Qh4 10. g3 Qh3 11. Nd2 Ne5 12. dxe4 dxe4 13. Nxe4 Bg4 14. f3 Bxh5 15. Qe2 Rad8 16. Nxd6 Rxd6 17. a3 Rfd8 18. b4 Nxf3+ 19. Rxf3 Rd1+ 20. Qf1 Bxf3 21. Bb2 Qg2# 0-1

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.24"]
[Round "6"]
[White "Sierra, Hernando"]
[Black "Dabraccio, Guillermo"]
[Result "0-1"]
[ECO "B28"]
[BlackElo "1719"]
[PlyCount "74"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[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. Nf3 a6 5. c3 Nc6 6. Be3 cxd4 7. cxd4 Nge7 8. Bd3 Bd7 9. a3 Na5 10. 0-0 Nc4 11. Bxc4 dxc4 12. Nc3 Bc6 13. Rc1 Qd7 14. Nd2 b5 15. b4 Nd5 16. Nde4 Be7 17. Qg4 0-0 18. Bh6 g6 19. Bxf8 Kxf8 20. Rfd1 Kg7 21. Nc5 Qc7 22. N3e4 a5 23. Ng5 Bxg5 24. Qxg5 axb4 25. axb4 Nxb4 26. Rc3 Nd5 27. Rh3 h5 28. Rxh5 Rh8 29. Rxh8 Kxh8 30. Ne4 Qe7 31. h4 Kg7 32. Nf6 Nxf6 33. exf6+ Qxf6 34. Qc5 Be8 35. g3 Qf3 36. Rc1 Bc6 37. Qe5+ Kh7 0-1

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.23"]
[Round "3"]
[White "Rendon, Rodolfo Alberto"]
[Black "Sierra, Hernando"]
[Result "1-0"]
[ECO "D38"]
[PlyCount "53"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Bb4 5. e3 h6 6. Bxf6 Qxf6 7. Nf3 0-0 8. Be2 Nc6 9. 0-0 Ne7 10. Rc1 Bxc3 11. Rxc3 b6 12. Ne5 Ng6 13. Nxg6 Qxg6 14. cxd5 exd5 15. Rxc7 Bf5 16. Bf3 Qd6 17. Rc3 Rac8 18. Qb3 Be4 19. Bxe4 dxe4 20. Rfc1 Qd7 21. h3 Rfe8 22. Qa3 Rxc3 23. Rxc3 Re6 24. Qa6 Rg6 25. Qc8+ Qxc8 26. Rxc8+ Kh7 27. Rc7 1-0

[Event "COL-ch sf"]
[Site "Santa Rosa"]
[Date "2011.06.22"]
[Round "2"]
[White "Sierra, Hernando"]
[Black "Torres, Saulo de Jesus"]
[Result "0-1"]
[ECO "B34"]
[BlackElo "1905"]
[PlyCount "38"]
[EventDate "2011.06.22"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "COL"]
[SourceTitle "CBM 143 Extra"]
[Source "ChessBase"]
[SourceDate "2011.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2011.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bd3 0-0 8. Qd2 d5 9. 0-0-0 dxe4 10. Bxe4 Nxe4 11. Nxe4 Ne5 12. Qe2 Qa5 13. Nc3 Ng4 14. Nb3 Qc7 15. Bd4 Qf4+ 16. Qd2 Qxd2+ 17. Rxd2 Bh6 18. h3 Bxd2+ 19. Nxd2 Nf6 0-1

[Event "Verano op 2nd"]
[Site "Verano"]
[Date "2009.11.01"]
[Round "3.12"]
[White "Contreras, Camilo Andres"]
[Black "Sierra, Hernando"]
[Result "1/2-1/2"]
[ECO "C64"]
[WhiteElo "1600"]
[BlackElo "1600"]
[PlyCount "43"]
[EventDate "2009.10.31"]
[EventType "swiss (rapid)"]
[EventRounds "6"]
[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 Bc5 4. c3 d6 5. h3 Nf6 6. 0-0 0-0 7. Re1 Be6 8. d4 exd4 9. cxd4 Bb4 10. Bd2 Bxd2 11. Nbxd2 Bd7 12. Rc1 Re8 13. Bd3 Qc8 14. Kh2 Nh5 15. Rxc6 bxc6 16. Ng5 Nf4 17. Qf3 Nxd3 18. Qxf7+ Kh8 19. Qh5 h6 20. Nf7+ Kg8 21. Nxh6+ gxh6 22. Qg6+ 1/2-1/2

[Event "Verano op 2nd"]
[Site "Verano"]
[Date "2009.11.01"]
[Round "6.11"]
[White "Sierra, Hernando"]
[Black "Caicedo, Ronald"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "1600"]
[BlackElo "1533"]
[PlyCount "46"]
[EventDate "2009.10.31"]
[EventType "swiss (rapid)"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 d6 3. Nf3 Be6 4. d3 Bxc4 5. dxc4 Nc6 6. Be3 Nf6 7. c3 Nxe4 8. Nbd2 Nxd2 9. Qxd2 Be7 10. h4 h6 11. 0-0-0 Bf6 12. g4 e4 13. Nd4 Ne5 14. g5 Nxc4 15. Qe2 Nxe3 16. Qxe3 Be7 17. Qxe4 c6 18. gxh6 gxh6 19. Nf5 Kf8 20. Qd4 Bf6 21. Qxd6+ Qxd6 22. Rxd6 Be5 23. Rxh6 Rxh6 0-1

[Event "Verano op 2nd"]
[Site "Verano"]
[Date "2009.10.31"]
[Round "1.9"]
[White "Borrero, Alexander"]
[Black "Sierra, Hernando"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1783"]
[BlackElo "1600"]
[PlyCount "43"]
[EventDate "2009.10.31"]
[EventType "swiss (rapid)"]
[EventRounds "6"]
[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 Nf6 4. 0-0 Bc5 5. c3 d6 6. d4 Bb6 7. h3 Nxe4 8. Re1 d5 9. Bd3 Bf5 10. Nbd2 Nxd2 11. Nxe5 Ne4 12. Nxc6 bxc6 13. f3 Qe7 14. Qc2 0-0-0 15. fxe4 dxe4 16. Bxe4 Kb8 17. Bd2 Be6 18. Bxc6 Qd6 19. Bf3 Bxd4+ 20. cxd4 Qxd4+ 21. Be3 Qh4 22. Qc6 1-0

[Event "Verano op 2nd"]
[Site "Verano"]
[Date "2009.10.31"]
[Round "2.8"]
[White "Sierra, Hernando"]
[Black "Renteria Valencia, Helen Manuela"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1600"]
[BlackElo "1932"]
[PlyCount "66"]
[EventDate "2009.10.31"]
[EventType "swiss (rapid)"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Bc5 3. Nf3 Nc6 4. d3 Nf6 5. Nc3 d6 6. Nd5 h6 7. Be3 Bg4 8. c3 a6 9. Qd2 b5 10. Nxf6+ Qxf6 11. Bd5 Bd7 12. h4 b4 13. Rc1 Rb8 14. Bxc5 dxc5 15. Qc2 Bg4 16. Bxc6+ Qxc6 17. Nxe5 Qe6 18. d4 Bh5 19. cxb4 cxd4 20. Qa4+ Rb5 21. f4 0-0 22. Rc6 Qe7 23. Rxa6 Rxb4 24. Qa3 Qc5 25. Nd3 Qc2 26. Kf1 Qd1+ 27. Ne1 Qe2+ 28. Kg1 Qxe1+ 29. Kh2 Qxh4+ 30. Kg1 Qe1+ 31. Kh2 Qf2 32. Ra5 Qxf4+ 33. Kg1 Rc4 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.17"]
[Round "7"]
[White "Gomez Lenis, Adolfo Leon"]
[Black "Sierra, Hernando"]
[Result "1/2-1/2"]
[ECO "D06"]
[PlyCount "92"]
[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 d5 3. cxd5 Bf5 4. Nc3 Nxd5 5. Qb3 Nb6 6. e4 Bg6 7. Nf3 c6 8. Be2 e6 9. 0-0 Bd6 10. e5 Be7 11. Be3 0-0 12. Rac1 N8d7 13. a3 Rb8 14. Qd1 f5 15. Qd2 Qe8 16. Ne1 Rd8 17. f4 Bh5 18. Bxh5 Qxh5 19. Qe2 g6 20. Qxh5 gxh5 21. Ne2 h4 22. Rf3 Kf7 23. Rh3 Rg8 24. Bf2 Rg4 25. g3 Rdg8 26. Ng2 Nd5 27. Kh1 N7b6 28. Nxh4 Bxh4 29. Rxh4 Rxh4 30. gxh4 Na4 31. b3 Nb2 32. Bg3 Ne3 33. Rc3 Nf1 34. Kg2 Nxg3 35. hxg3 Nd1 36. Rf3 Rd8 37. Kf1 c5 38. Ke1 Nb2 39. dxc5 Nd3+ 40. Kf1 Nxc5 41. Rc3 Ne4 42. Rc7+ Kg6 43. Rxb7 Rd1+ 44. Kg2 Rd2 45. Kf3 Rd3+ 46. Kg2 Rd2 1/2-1/2

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.17"]
[Round "6"]
[White "Tamayo, Jhonson David"]
[Black "Sierra, Hernando"]
[Result "0-1"]
[ECO "D06"]
[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 d5 2. c4 Nf6 3. Nc3 Bf5 4. e3 e6 5. a3 Bd6 6. Bd3 0-0 7. Nge2 c6 8. 0-0 Ng4 9. g3 Qf6 10. f3 Nh6 11. e4 Bh3 12. Rf2 Qe7 13. e5 Bc7 14. Nf4 Bf5 15. Nh5 Bxd3 16. Qxd3 Nf5 17. g4 dxc4 18. Qe4 Nxd4 19. Qxd4 Bb6 20. Qe4 Bxf2+ 21. Kxf2 Qc5+ 22. Be3 Qe7 23. Kg3 Nd7 24. Rd1 f5 25. Qc2 Nxe5 26. Bd4 Nxg4 27. Bxg7 Ne3 28. Qd2 Nxd1 29. Bxf8 Rxf8 30. Nxd1 Qf7 31. Qh6 Rd8 32. Nf2 Qg6+ 33. Qxg6+ hxg6 34. Nf4 g5 35. Ne2 Rd2 36. Nc1 Rxb2 37. Nd1 Rb1 38. Nc3 Rxc1 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "4"]
[White "Montoya, Duvan"]
[Black "Sierra, Hernando"]
[Result "1-0"]
[ECO "C34"]
[PlyCount "35"]
[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 e5 2. f4 exf4 3. Nf3 Nc6 4. d4 d5 5. e5 Bg4 6. Bb5 Nge7 7. Bxf4 a6 8. Ba4 b5 9. Bb3 Ng6 10. Be3 Nh4 11. 0-0 Be7 12. Nc3 Nxf3+ 13. gxf3 Be6 14. f4 f5 15. Qf3 Qd7 16. Nxd5 0-0-0 17. Nxe7+ Qxe7 18. Qxc6 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "5"]
[White "Sierra, Hernando"]
[Black "Cadavid, Juan Miguel"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "66"]
[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 e5 2. Bc4 Nf6 3. Nc3 Nc6 4. d3 Bc5 5. Nf3 d6 6. Bg5 Be6 7. Nd5 Bxd5 8. Bxd5 0-0 9. Qd2 Rb8 10. h4 h6 11. Bxh6 Ng4 12. Be3 Nxe3 13. fxe3 Nb4 14. Bc4 a5 15. d4 exd4 16. exd4 d5 17. Bxd5 Nxd5 18. exd5 Re8+ 19. Ne5 Be7 20. Qf2 Bf6 21. 0-0-0 Bxe5 22. dxe5 Rxe5 23. Rhf1 f6 24. Qg3 Rc8 25. Qb3 b6 26. Rd4 Kh8 27. Rfd1 Qe8 28. Qg3 Re3 29. Qg4 Rd8 30. Rc4 c5 31. dxc6 Rxd1+ 32. Kxd1 Re1+ 33. Kd2 Qe3# 0-1

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.16"]
[Round "3"]
[White "Sierra, Hernando"]
[Black "Ospina Escobar, Isabela"]
[Result "1-0"]
[ECO "B40"]
[PlyCount "41"]
[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. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Ng4 6. Qxg4 Be7 7. Bd3 d6 8. Qxg7 Bf6 9. Qg3 Be5 10. Qe3 Nd7 11. Bd2 Nf6 12. f4 Bxd4 13. Qxd4 d5 14. exd5 exd5 15. 0-0-0 Bg4 16. Bb5+ Ke7 17. Rde1+ Kd6 18. Qe5+ Kc5 19. Be3+ Kb4 20. a3+ Ka5 21. b4# 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.15"]
[Round "2"]
[White "Hoyos, Julio Cesar"]
[Black "Sierra, Hernando"]
[Result "1-0"]
[ECO "D02"]
[PlyCount "39"]
[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. Nf3 Nc6 2. d4 d5 3. g3 Bf5 4. Bg2 e6 5. 0-0 Bd6 6. Nh4 Bg6 7. Nc3 Nf6 8. a3 Qe7 9. b4 0-0-0 10. Nb5 Rdg8 11. c3 Be4 12. Nf3 h6 13. Qa4 Kb8 14. Nxd6 Qxd6 15. b5 Ne7 16. Ne5 Rf8 17. Bf4 g5 18. Nc6+ Nxc6 19. Bxd6 Bxg2 20. Bxf8 1-0

[Event "Cartago op"]
[Site "Cartago"]
[Date "2009.08.15"]
[Round "1"]
[White "Sierra, Hernando"]
[Black "Castaneda, John Jairo"]
[Result "0-1"]
[ECO "C11"]
[PlyCount "46"]
[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 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. Nf3 c5 6. Be3 cxd4 7. Qxd4 Nc6 8. Qa4 Be7 9. Bb5 Qc7 10. Bf4 a6 11. 0-0-0 axb5 12. Qxa8 Nb6 13. Nxb5 Nxa8 14. Nxc7+ Nxc7 15. c3 Bd7 16. Kc2 0-0 17. Rhe1 Ra8 18. a3 Na5 19. Nd4 Nc4 20. Rd3 Na6 21. Rg3 Nc5 22. f3 Nxb2 23. Rh1 Nc4 0-1

