[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.15"]
[Round "6.3"]
[White "Jaramillo Ochoa, Mateo"]
[Black "Arenas, Johan"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "1963"]
[PlyCount "85"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. c4 dxc4 6. Bxc4 e6 7. Nc3 Nd7 8. Bg5 Be7 9. Bxe7 Nxe7 10. Nge2 Nb6 11. Bb3 Bg6 12. Nf4 Nbd5 13. Bxd5 Nxd5 14. Ncxd5 cxd5 15. Nxg6 fxg6 16. Qc2 0-0 17. g3 Kh7 18. Rc1 Rc8 19. Qxc8 Qxc8 20. Rxc8 Rxc8 21. Kd2 Kh6 22. f4 Kh7 23. Rb1 Kg8 24. b3 b6 25. a4 a6 26. Kd3 Kf8 27. Kd2 Ke7 28. Rg1 Kf8 29. Rf1 Ke7 30. Rf3 Rf8 31. Rc3 Kd7 32. Ke3 Rc8 33. Rxc8 Kxc8 34. f5 gxf5 35. Kf4 Kd7 36. Kg5 Ke7 37. Kxh5 Kf7 38. Kg5 a5 39. h5 Kf8 40. Kg6 Kg8 41. h6 gxh6 42. Kxh6 Kf7 43. Kh7 1-0

[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.14"]
[Round "5.4"]
[White "Arenas, Johan"]
[Black "Valencia Gantiva, Cristian"]
[Result "1/2-1/2"]
[ECO "B92"]
[BlackElo "1936"]
[PlyCount "44"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Be3 Be6 9. f3 Nbd7 10. Qd2 b5 11. 0-0 0-0 12. a4 b4 13. Nd5 Bxd5 14. exd5 a5 15. f4 Qc7 16. Kh1 Nb6 17. Bxb6 Qxb6 18. Bb5 Ne4 19. Qe2 f5 20. Bd7 g6 21. fxe5 dxe5 22. Be6+ Kg7 1/2-1/2

[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.14"]
[Round "4.5"]
[White "Gutierrez Hernandez, Jorge Alejandro"]
[Black "Arenas, Johan"]
[Result "0-1"]
[ECO "D13"]
[PlyCount "102"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 c6 2. c4 d5 3. cxd5 cxd5 4. Nc3 Nc6 5. Bf4 a6 6. a3 Nf6 7. e3 e6 8. Nf3 Bd6 9. Bxd6 Qxd6 10. Bd3 0-0 11. 0-0 b5 12. b4 Bb7 13. Rc1 Rac8 14. Qe2 Rc7 15. Rc2 Rfc8 16. Bxb5 Nxb4 17. axb4 Rxc3 18. Rxc3 Rxc3 19. Bd3 Ne4 20. Rb1 h6 21. g3 Rc8 22. Bxe4 dxe4 23. Nd2 Bd5 24. Nb3 Qxb4 25. Qd1 Rb8 26. Nd2 Qd6 27. Ra1 Qc6 28. Rc1 Qb5 29. Rb1 Qe8 30. Ra1 Rb6 31. Qc2 Qc6 32. Qxc6 Rxc6 33. Kf1 Kf8 34. Ke1 Ke7 35. Kd1 Kd6 36. f3 f5 37. f4 Kc7 38. Rb1 Rc3 39. Rc1 Rxc1+ 40. Kxc1 Kb6 41. Kb2 Kb5 42. Kc3 a5 43. Nb1 Ka4 44. Kc2 Kb4 45. Kb2 a4 46. Na3 Bb3 47. Nc2+ Bxc2 48. Kxc2 a3 49. Kb1 Kc3 50. g4 g6 51. g5 h5 0-1

[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.12"]
[Round "2.6"]
[White "Arenas, Johan"]
[Black "Restrepo Garcia, Nicolas"]
[Result "0-1"]
[ECO "B38"]
[PlyCount "118"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 g6 6. Be2 Bg7 7. Be3 d6 8. 0-0 Nf6 9. Nc3 0-0 10. h3 Ne5 11. f4 Ned7 12. Nc2 Qc7 13. b3 Nc5 14. Bf3 Rb8 15. Rc1 Ne8 16. Nd5 Qd8 17. Qe2 Nc7 18. Ncb4 Be6 19. Rfd1 Nxd5 20. Nxd5 Bxd5 21. Rxd5 Qc7 22. Qf2 Nd7 23. a4 b6 24. Bd4 Nf6 25. Rg5 Bh6 26. Bxf6 exf6 27. Rg4 b5 28. axb5 axb5 29. Rh4 Kg7 30. Be2 Rfe8 31. Qd4 Rbc8 32. Rd1 bxc4 33. Bxc4 Qc5 34. Kh1 Qxd4 35. Rxd4 g5 36. Rg4 Rcd8 37. f5 Kf8 38. Rg3 Bg7 39. Rgd3 Ke7 40. Kg1 Rf8 41. Rd5 h5 42. Bb5 Bh6 43. Rc3 Rc8 44. Bc4 Rfd8 45. g4 h4 46. Kf2 Bf8 47. Ke3 Rd7 48. Ra5 Rb7 49. Rd3 Kd8 50. Ra4 Rcb8 51. Rd5 Be7 52. Rda5 Rc7 53. Kd4 Ke8 54. Ra7 Bd8 55. R4a6 Rxa7 56. Rxd6 Rd7 57. Rxd7 Kxd7 58. Bxf7 Kd6 59. Bd5 Rb4+ 0-1

[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.12"]
[Round "3.6"]
[White "Gomez, Nicolas de Jesus"]
[Black "Arenas, Johan"]
[Result "0-1"]
[ECO "D53"]
[PlyCount "78"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Be7 6. e3 Nbd7 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 a6 10. 0-0 h6 11. Bf4 c5 12. Bg3 0-0 13. Be2 Bb7 14. a3 Rc8 15. dxc5 Nxc5 16. b4 Nce4 17. Nxe4 Nxe4 18. Be5 Nc3 19. Bxc3 Rxc3 20. Nd4 Qb6 21. Qd2 Rc7 22. a4 Rd8 23. Qb2 bxa4 24. Rxa4 Rxd4 25. Qxd4 Qc6 26. Qg4 Qxa4 27. f4 Qxb4 28. Rd1 Qb6 29. Rd3 Be4 30. Rd4 Bc5 31. Rd8+ Kh7 32. Bd3 Bxd3 33. Rxd3 Bxe3+ 34. Kf1 Rc2 35. f5 Rf2+ 36. Ke1 Qb1+ 37. Rd1 Qb4+ 38. Qxb4 Rxf5 39. Rd7 a5 0-1

[Event "East Region-ch U18"]
[Site "Armenia"]
[Date "2012.04.12"]
[Round "1.3"]
[White "Posada, Juan Manuel"]
[Black "Arenas, Johan"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2016"]
[PlyCount "58"]
[EventDate "2012.04.12"]
[EventType "swiss"]
[EventRounds "6"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. Nf3 Bg4 6. h3 Bh5 7. 0-0 Nbd7 8. Re1 Qc7 9. Na3 a6 10. c4 e6 11. c5 Be7 12. Bg5 0-0 13. Bh4 Rac8 14. b4 Qf4 15. Bg3 Bxf3 16. Bxf4 Bxd1 17. Raxd1 Rfe8 18. b5 a5 19. Nb1 b6 20. c6 Nf8 21. Nc3 Bd8 22. Na4 Nh5 23. Bd6 Bc7 24. Bxc7 Rxc7 25. Nxb6 Nf4 26. Bf1 Rb8 27. Na4 N8g6 28. Rc1 Ne7 29. Nc5 Nc8 1-0

[Event "ATL-ch sf"]
[Site "Barranquilla"]
[Date "2001.03.08"]
[Round "5"]
[White "Gutierrez, Aramis"]
[Black "Arenas, Johan"]
[Result "1-0"]
[ECO "C56"]
[PlyCount "53"]
[EventDate "2001.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 d5 6. exd5 Nxd5 7. Re1+ Be7 8. Nxd4 Nb6 9. Bb5 Bd7 10. Nxc6 bxc6 11. Bd3 0-0 12. Nc3 Bf6 13. Ne4 Be6 14. Nxf6+ Qxf6 15. Qh5 g6 16. Qh6 Nc4 17. Bg5 Qxb2 18. Rab1 Qg7 19. Qxg7+ Kxg7 20. Rxe6 fxe6 21. Bxc4 Rab8 22. Rxb8 Rxb8 23. Kf1 Rb1+ 24. Ke2 Rb4 25. Kd3 e5 26. Be3 e4+ 27. Kc3 1-0

[Event "ATL-ch sf"]
[Site "Barranquilla"]
[Date "2001.03.07"]
[Round "4"]
[White "Arenas, Johan"]
[Black "Zapata, Carlos Alberto"]
[Result "0-1"]
[ECO "C50"]
[PlyCount "94"]
[EventDate "2001.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 dxc3 6. Qd5 Nh6 7. Bxh6 0-0 8. Nxc3 gxh6 9. 0-0 Bf6 10. Rac1 d6 11. Qh5 Bg7 12. Nh4 Qg5 13. Qxg5 hxg5 14. Nf3 Bh6 15. Nd2 g4 16. Rfd1 Ne7 17. Nb5 Bd7 18. Nxc7 Rac8 19. Bb3 b5 20. Rc2 a5 21. a3 a4 22. Ba2 Kh8 23. Nf1 Bf4 24. g3 Be5 25. Rdc1 f5 26. Be6 Bxe6 27. Nxe6 Rxc2 28. Rxc2 Rc8 29. Rc7 Rxc7 30. Nxc7 Bxb2 31. Nxb5 fxe4 32. Ne3 h5 33. Nc4 Bc1 34. Nbxd6 e3 35. fxe3 Nd5 36. e4 Ne3 37. Kf2 Nxc4 38. Nxc4 Kg7 39. Ke2 Kf6 40. Kd1 Bh6 41. Kc2 Bf8 42. Kb2 Bc5 43. Ka2 Bg1 44. Nd2 Bxh2 45. Nf1 Bg1 46. Kb2 Ke5 47. Kc3 Kxe4 0-1

[Event "ATL-ch sf"]
[Site "Barranquilla"]
[Date "2001.03.06"]
[Round "3"]
[White "Orozco, Osvaldo"]
[Black "Arenas, Johan"]
[Result "1-0"]
[ECO "C63"]
[PlyCount "55"]
[EventDate "2001.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. d3 fxe4 5. dxe4 Nf6 6. 0-0 d6 7. Nc3 Bd7 8. a3 Na5 9. Be2 a6 10. b4 Nc6 11. Ng5 b5 12. f4 Nd4 13. Nd5 Be7 14. fxe5 dxe5 15. Nxe7 Nxe2+ 16. Qxe2 Qxe7 17. Bb2 0-0 18. Nf3 Bg4 19. h3 Bxf3 20. Rxf3 Rae8 21. Raf1 c5 22. Kh2 cxb4 23. axb4 Qb7 24. Qd3 Qxe4 25. Rxf6 Qxd3 26. Rxf8+ Rxf8 27. Rxf8+ Kxf8 28. cxd3 1-0

[Event "ATL-ch sf"]
[Site "Barranquilla"]
[Date "2001.03.05"]
[Round "2"]
[White "Arenas, Johan"]
[Black "Lopez, Gerson"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "115"]
[EventDate "2001.03.05"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e5 6. Bc4 Be7 7. Qd5 d6 8. Qxf7+ Kd7 9. Be6+ Kc7 10. Nd5+ Kb8 11. Bxc8 Kxc8 12. Qxg7 Nf6 13. Nxf6 Bxf6 14. Qg4+ Kc7 15. 0-0 Rg8 16. Qf5 Qe7 17. Be3 Raf8 18. Qh5 Qg7 19. Qh3 Qg6 20. Rac1 Kb8 21. Rfd1 Be7 22. Rc4 Qf7 23. Nd2 Bg5 24. b3 h5 25. Rcc1 Nd4 26. Kf1 Bxe3 27. Qxe3 h4 28. Nc4 Qf6 29. Rd2 Rg7 30. Rc3 Rfg8 31. g3 hxg3 32. hxg3 Qh4 33. Rxd4 Qh1+ 34. Ke2 exd4 35. Qxd4 Qh5+ 36. Ke1 Rd7 37. Nxd6 Qh7 38. Qe5 Ka8 39. Qf5 Qg7 40. Qc5 Qf8 41. Nb5 Qxc5 42. Rxc5 Rgd8 43. Nc3 b6 44. Rd5 Kb7 45. Rxd7+ Rxd7 46. Nd5 Kc6 47. Ke2 Kc5 48. Ke3 a5 49. g4 b5 50. g5 Rg7 51. f4 Rh7 52. f5 Rh3+ 53. Kf4 a4 54. g6 axb3 55. axb3 Rh4+ 56. Ke5 Kc6 57. Ne7+ Kd7 58. f6 1-0

[Event "COL-ch XI Univ G2 fin"]
[Site "Barranquilla"]
[Date "2000.11.11"]
[Round "2.4"]
[White "Arenas, Johan"]
[Black "Sanabria Pacheco, John"]
[Result "0-1"]
[ECO "C42"]
[PlyCount "76"]
[EventDate "2000.11.09"]
[EventType "team"]
[EventRounds "3"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nxf7 Kxf7 5. Bc4+ Be6 6. Bxe6+ Kxe6 7. d4 Kf7 8. Nc3 Be7 9. 0-0 Rf8 10. f4 Kg8 11. e5 dxe5 12. fxe5 Nd5 13. Qg4 Rxf1+ 14. Kxf1 Nxc3 15. bxc3 Nd7 16. Bh6 Bf8 17. Ke2 Qe7 18. Bg5 Qe8 19. e6 Nb6 20. c4 Nxc4 21. e7 Bxe7 22. Qe6+ Qf7 23. Qxf7+ Kxf7 24. Rf1+ Ke8 25. Bxe7 Kxe7 26. Kd3 Nd6 27. Rf2 c5 28. dxc5 Nf7 29. Re2+ Kd7 30. Kc4 Re8 31. Rd2+ Kc6 32. a4 a5 33. c3 Re7 34. Rd5 Ne5+ 35. Kd4 Rd7 36. c4 Ng4 37. Rxd7 Kxd7 38. h3 Nf6 0-1

[Event "COL-ch XI Univ G-A sf"]
[Site "Barranquilla"]
[Date "2000.11.10"]
[Round "3.4"]
[White "Arenas, Johan"]
[Black "Numpaque, Orlando"]
[Result "1-0"]
[ECO "B22"]
[PlyCount "61"]
[EventDate "2000.11.09"]
[EventType "team"]
[EventRounds "3"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 g6 4. cxd4 Bg7 5. Nc3 a6 6. Bc4 d6 7. Qb3 e6 8. d5 e5 9. Nge2 Nd7 10. Be3 Bh6 11. Bxh6 Nxh6 12. h3 Nc5 13. Qc2 b5 14. b4 Nb7 15. Bd3 Bd7 16. Qd2 Qh4 17. Ng3 0-0 18. a4 f5 19. exf5 Nxf5 20. Nxf5 Bxf5 21. Bxf5 gxf5 22. axb5 axb5 23. 0-0 f4 24. f3 Qe7 25. Nxb5 Rab8 26. Ra7 Qd8 27. Rc1 Qb6+ 28. Kh1 Qxb5 29. Rc7 Qb6 30. Qc2 Qxa7 31. Qxh7# 1-0

[Event "COL-ch XI Univ G2 fin"]
[Site "Barranquilla"]
[Date "2000.11.10"]
[Round "1.4"]
[White "Arenas, Johan"]
[Black "Romero Velandia, Dilson"]
[Result "1-0"]
[ECO "B21"]
[PlyCount "89"]
[EventDate "2000.11.09"]
[EventType "team"]
[EventRounds "3"]
[EventCountry "COL"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 d6 5. Bc4 Nc6 6. Nf3 a6 7. 0-0 e6 8. Qe2 Qc7 9. Bf4 b5 10. Bb3 Na5 11. Bc2 Bb7 12. Rac1 e5 13. Be3 Be7 14. Rfd1 Nc4 15. Bb3 Nf6 16. Nd5 Nxd5 17. exd5 Rc8 18. Bxc4 bxc4 19. b3 c3 20. Qd3 Bf6 21. Bg5 Bxg5 22. Nxg5 h6 23. Ne4 c2 24. Rd2 0-0 25. Rdxc2 Qd7 26. Rxc8 Rxc8 27. Rxc8+ Bxc8 28. Qg3 Kf8 29. f4 f5 30. Nc3 e4 31. Qe3 Qc7 32. Kf2 Ke7 33. Qd4 Qc5 34. Ke3 g5 35. g3 g4 36. b4 Qxd4+ 37. Kxd4 Kd7 38. a4 Kc7 39. a5 Bd7 40. Nd1 Be8 41. Ne3 Bg6 42. Kc4 Kb7 43. b5 axb5+ 44. Kxb5 Be8+ 45. Kb4 1-0

