[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.16"]
[Round "8"]
[White "Londono Zamora, Duberney"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D43"]
[WhiteElo "1668"]
[BlackElo "1797"]
[PlyCount "80"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 h6 6. Bh4 dxc4 7. e4 g5 8. Bg3 b5 9. Be2 Bb7 10. Qc2 Nbd7 11. h4 g4 12. Ne5 h5 13. Rd1 Bg7 14. Nxd7 Nxd7 15. Bd6 Qb6 16. e5 c5 17. d5 Nxe5 18. dxe6 fxe6 19. Bxe5 Bxe5 20. Qg6+ Ke7 21. 0-0 Rag8 22. Qc2 Bd4 23. Kh1 Qc6 24. f3 gxf3 25. Bxf3 Qd7 26. Ne2 Bxf3 27. Rxf3 Rg4 28. g3 Qd5 29. Rdf1 Rf8 30. Nf4 Qc6 31. Kh2 Rf5 32. Qe2 Be5 33. Nxh5 Rxh4+ 34. Kg1 Bd4+ 35. Kg2 Rhxh5 36. g4 Rxf3 37. Rxf3 Re5 38. Qc2 Re3 39. Qh7+ Kd6 40. Qh2+ Be5 0-1

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.15"]
[Round "7"]
[White "Martinez Serna, Juan Esteban"]
[Black "Llano Buritica, Eduardo Alejandro"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "1797"]
[BlackElo "1913"]
[PlyCount "119"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 f5 2. c4 Nf6 3. Nf3 b6 4. g3 Bb7 5. Bg2 g6 6. 0-0 Bg7 7. Nc3 Ne4 8. Nxe4 Bxe4 9. b3 0-0 10. Bb2 Nc6 11. Qd2 d5 12. Rfd1 Qd6 13. Rac1 Rad8 14. c5 Qd7 15. Qf4 b5 16. h4 e6 17. e3 h6 18. Bf1 Rb8 19. Nd2 Qe7 20. g4 fxg4 21. Qxg4 h5 22. Qg3 Bf5 23. Be2 e5 24. dxe5 Nxe5 25. Bd4 c6 26. Nf3 Nxf3+ 27. Bxf3 Bxd4 28. Rxd4 Kh7 29. Qd6 Qf6 30. Qxf6 Rxf6 31. e4 Bh3 32. Rc3 Rf4 33. Rd2 b4 34. Re3 Rbf8 35. Bh1 Be6 36. exd5 Bxd5 37. Bxd5 cxd5 38. Re7+ Kh6 39. c6 R4f6 40. Rc2 Rc8 41. c7 Rd6 42. Kf1 g5 43. hxg5+ Kxg5 44. Re5+ Kg6 45. Rc5 Rd7 46. Rc6+ Kg7 47. Rg5+ Kf7 48. Rxh5 Kg7 49. Ke2 d4 50. Kd3 Rf7 51. Kxd4 Rxf2 52. Ra5 Kf7 53. Rxa7 Ke7 54. Kc5 Kd7 55. Kb6 Rf3 56. Rc4 Rc3 57. Rb7 Kd6 58. Rb8 Rxc7 59. Rxc7 Rxc7 60. Rd8+ 1-0

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.15"]
[Round "6"]
[White "Roldan Arboleda, Jorge Alain"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B72"]
[WhiteElo "1600"]
[BlackElo "1797"]
[PlyCount "100"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. Qd2 Ng4 8. Bg5 h6 9. Bh4 Nc6 10. Nb3 Be6 11. f4 0-0 12. h3 Nf6 13. 0-0-0 Bxb3 14. cxb3 Qa5 15. Kb1 Rfc8 16. a3 Rab8 17. g4 b5 18. Bxf6 Bxf6 19. Nd5 Bh4 20. Qxa5 Nxa5 21. g5 Kf8 22. b4 Nc4 23. gxh6 e6 24. Bxc4 Rxc4 25. Nc3 Ke7 26. Kc2 Bf6 27. Rhe1 Bxc3 28. bxc3 Rh8 29. Rd3 Rxh6 30. Kb3 Rh4 31. Rf3 a6 32. a4 f5 33. exf5 gxf5 34. axb5 axb5 35. Rfe3 Rh6 36. Rf1 Re4 37. Rg3 Kf7 38. Rf2 Rh4 39. Rgf3 Kf6 40. Kc2 Re1 41. Rg2 e5 42. Rd3 exf4 43. Rxd6+ Ke5 44. Rb6 f3 45. Rf2 Kf4 46. Kd2 Re5 47. Rg6 Rxh3 48. Rg1 Rg3 49. Rgf1 Rd5+ 50. Kc2 Ke3 0-1

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.14"]
[Round "5"]
[White "Martinez Serna, Juan Esteban"]
[Black "Luna Monsalve, Sofia"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "1797"]
[BlackElo "1582"]
[PlyCount "47"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Be7 5. Bf4 0-0 6. e3 Nh5 7. Bg3 Nd7 8. cxd5 Nxg3 9. hxg3 Nf6 10. dxe6 Bxe6 11. Bd3 h6 12. 0-0 c5 13. Qe2 Rc8 14. Rfd1 c4 15. Bc2 Qa5 16. e4 Rfd8 17. d5 Bg4 18. e5 Bxf3 19. gxf3 Nd7 20. d6 Bf8 21. Qe4 g6 22. e6 fxe6 23. Qxe6+ Kh8 24. Qxg6 1-0

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.13"]
[Round "2"]
[White "Garcia Lopez, Juan Gilberto"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1/2-1/2"]
[ECO "A11"]
[WhiteElo "1533"]
[BlackElo "1797"]
[PlyCount "81"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 c6 3. e3 Nf6 4. Nc3 e6 5. b3 Bd6 6. Bb2 0-0 7. Be2 b6 8. 0-0 Bb7 9. Qc2 Na6 10. Rac1 Qe7 11. cxd5 Nb4 12. Qb1 cxd5 13. Rfe1 Rac8 14. a3 Nc6 15. b4 e5 16. Ng5 g6 17. d3 h6 18. Nf3 Qe6 19. Bd1 a5 20. b5 Nb8 21. Bb3 Qe7 22. Qa2 e4 23. dxe4 dxe4 24. Nd4 Nbd7 25. Nd5 Bxd5 26. Bxd5 Qe5 27. Bxf7+ Rxf7 28. Rxc8+ Nf8 29. g3 Qh5 30. Ne6 Ng4 31. h4 Nxf2 32. Nxf8 Nh3+ 33. Kh2 Bxg3+ 34. Kxg3 Qf3+ 35. Kh2 Qf2+ 36. Kxh3 Qf5+ 37. Kh2 Qf2+ 38. Kh3 Qf5+ 39. Kg3 Qf2+ 40. Kh3 Qf5+ 41. Kg3 1/2-1/2

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.13"]
[Round "3"]
[White "Martinez Serna, Juan Esteban"]
[Black "Guzman Guacas, Daniel Stiven"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1797"]
[BlackElo "1477"]
[PlyCount "143"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nf3 b6 4. Nc3 Bb7 5. Bf4 Bd6 6. Bxd6 Qxd6 7. cxd5 exd5 8. e3 Nf6 9. Bd3 a6 10. 0-0 0-0 11. Qc2 Nbd7 12. Rac1 g6 13. e4 dxe4 14. Nxe4 Nxe4 15. Bxe4 Bxe4 16. Qxe4 c5 17. Rfd1 Nf6 18. Qh4 Rac8 19. g3 cxd4 20. Rxc8 Rxc8 21. Rxd4 Rc1+ 22. Kg2 Qc6 23. Qf4 Ne8 24. Qe3 Kg7 25. Qe5+ Kg8 26. Qe7 Qe6 27. Qxe6 fxe6 28. Ng5 Kg7 29. Rd7+ Kf6 30. f4 Rc7 31. Rd8 Ke7 32. Rd2 h6 33. Nf3 Nf6 34. h4 Nd5 35. Ne5 Kf6 36. Re2 h5 37. Kf3 b5 38. Nd3 a5 39. Ne5 b4 40. Ke4 a4 41. Kd4 Ne7 42. g4 hxg4 43. Nxg4+ Kf7 44. Ne3 a3 45. bxa3 bxa3 46. Nc4 Nf5+ 47. Kd3 Nxh4 48. Nxa3 Kf6 49. Nb5 Rc5 50. Nd4 e5 51. Nb3 Rd5+ 52. Kc4 Rd8 53. fxe5+ Ke7 54. Nd4 g5 55. Nc6+ Kd7 56. Nxd8 Kxd8 57. a4 Nf5 58. Kc5 g4 59. a5 Kc7 60. e6 Ne7 61. Rg2 Nc6 62. a6 Ne5 63. a7 Kb7 64. e7 Nd7+ 65. Kd6 Nf6 66. Rxg4 Ne8+ 67. Ke6 Kxa7 68. Rg8 Nc7+ 69. Kd7 Nd5 70. e8Q Nb6+ 71. Kc6 Nc8 72. Qe3+ 1-0

[Event "Medellin de La Raza U2000 op"]
[Site "Medellin"]
[Date "2023.10.12"]
[Round "1"]
[White "Martinez Serna, Juan Esteban"]
[Black "Chica Restrepo, Anderson"]
[Result "1-0"]
[ECO "D08"]
[WhiteElo "1797"]
[BlackElo "1334"]
[PlyCount "65"]
[EventDate "2023.10.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "Mega2024 Update 01"]
[Source "Chessbase"]
[SourceDate "2023.11.12"]
[SourceVersion "1"]
[SourceVersionDate "2023.11.12"]
[SourceQuality "1"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. a3 Bg4 6. Nbd2 Nge7 7. h3 Bxf3 8. Nxf3 Ng6 9. e3 dxe3 10. Bxe3 Be7 11. e6 0-0 12. exf7+ Rxf7 13. Qc2 Nce5 14. Be2 Qf8 15. 0-0-0 Bc5 16. Bxc5 Qxc5 17. Rd5 Qxf2 18. Nxe5 Nxe5 19. Qe4 Ng6 20. Rf1 Re7 21. Qxe7 Qxf1+ 22. Bxf1 Nxe7 23. Rd7 Rf8 24. Be2 Nc6 25. Rxc7 Nd4 26. Bd3 Nb3+ 27. Kc2 Na5 28. b4 Rf2+ 29. Kc3 Nc6 30. Be4 Re2 31. Bd5+ Kf8 32. Rxb7 Ne7 33. Rb8+ 1-0

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.06"]
[Round "6"]
[White "Montoya Fajardo, Fredy de Jesus"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B50"]
[BlackElo "1780"]
[PlyCount "94"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Qc2 Nc6 5. h3 e6 6. Be2 Be7 7. a3 0-0 8. d4 b6 9. Be3 Bb7 10. Nbd2 Rc8 11. dxc5 dxc5 12. Rd1 Qc7 13. 0-0 Rfd8 14. Nh2 a6 15. f4 b5 16. Ng4 Nd7 17. Nf3 c4 18. Kh1 Nc5 19. e5 Rxd1 20. Rxd1 Rd8 21. f5 Rxd1+ 22. Bxd1 h5 23. Nf2 Nxe5 24. fxe6 Nxe6 25. Qf5 Nxf3 26. Bxf3 g6 27. Qc2 Bxf3 28. gxf3 Qg3 29. Qe2 Bd6 30. Ne4 Qxh3+ 31. Kg1 Bf4 32. Nf6+ Kg7 33. Nd5 Qg3+ 34. Kf1 Bxe3 35. Nxe3 Nf4 36. Qf2 Qxf2+ 37. Kxf2 Nd3+ 38. Kg3 Nxb2 39. Kh4 Kh6 40. f4 f6 41. f5 Na4 42. fxg6 Nxc3 43. g7 Kxg7 44. Kxh5 Nb1 45. Nc2 c3 46. Kg4 Nxa3 47. Nxa3 b4 0-1

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.05"]
[Round "4"]
[White "Cordoba Perez, Jeronimo"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1/2-1/2"]
[ECO "A11"]
[WhiteElo "1935"]
[BlackElo "1780"]
[PlyCount "86"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 c6 2. Nf3 Nf6 3. g3 d5 4. Bg2 dxc4 5. 0-0 Nbd7 6. a4 Nb6 7. Na3 Bf5 8. a5 Nbd5 9. Nxc4 e6 10. d3 Bg6 11. Qb3 Rb8 12. Nfe5 Be7 13. a6 Nd7 14. Nxd7 Qxd7 15. Ne5 Qc7 16. e4 Nb4 17. Bf4 Bd6 18. Nxg6 hxg6 19. Qxb4 e5 20. Bxe5 Bxe5 21. d4 Bd6 22. Qc3 Qb6 23. axb7 0-0 24. e5 Bb4 25. Qc4 Rfd8 26. Rfd1 Rxb7 27. Ra6 Qb5 28. Rxc6 Qxc4 29. Rxc4 Rb5 30. d5 Ba5 31. Rc2 Bb6 32. Kf1 g5 33. Re2 Kf8 34. d6 Rc8 35. Bd5 Rcc5 36. Bxf7 Kxf7 37. e6+ Ke8 38. d7+ Ke7 39. d8Q+ Bxd8 40. Rd7+ Ke8 41. Rxg7 Re5 42. Rxe5 Rxe5 43. Rxa7 Rxe6 1/2-1/2

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.05"]
[Round "5"]
[White "Martinez Serna, Juan Esteban"]
[Black "Paulino Rijo, Luis Alejandro"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "1780"]
[BlackElo "1942"]
[PlyCount "60"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 0-0 6. e3 Nbd7 7. c5 c6 8. h4 b6 9. b4 a5 10. a3 Bb7 11. Bd3 Qc8 12. Ne5 Nxe5 13. Bxe5 Ba6 14. Bc2 Bc4 15. Kd2 axb4 16. axb4 Rxa1 17. Qxa1 bxc5 18. bxc5 Nd7 19. Bg3 e5 20. Bf5 exd4 21. exd4 Nxc5 22. Qb1 Nb3+ 23. Qxb3 Qxf5 24. Qc2 Qf6 25. Ne2 Bb4+ 26. Ke3 c5 27. f4 Re8+ 28. Kf3 Bxe2+ 29. Qxe2 Rxe2 30. Kxe2 Qxd4 0-1

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.04"]
[Round "2"]
[White "Calderon Guerra, Odalys Lisbeth"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1472"]
[BlackElo "1780"]
[PlyCount "68"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 c5 4. c3 e6 5. e3 Bd6 6. Bxd6 Qxd6 7. Ne5 Nbd7 8. f4 0-0 9. Nd2 c4 10. Be2 b5 11. a3 Bb7 12. 0-0 a5 13. b4 axb4 14. axb4 Rxa1 15. Qxa1 Ra8 16. Qb2 Qa6 17. Nxd7 Nxd7 18. Bf3 Qa2 19. Qxa2 Rxa2 20. Nb1 Nb6 21. Bd1 Na4 22. Bxa4 bxa4 23. Re1 a3 24. Kf1 Ra1 25. Nxa3 Rxa3 26. Rc1 Ra2 27. Rb1 Kf8 28. Rc1 Ke7 29. h3 Kd6 30. g4 Kc6 31. b5+ Kxb5 32. Rb1+ Kc6 33. f5 exf5 34. gxf5 Bc8 0-1

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.04"]
[Round "3"]
[White "Martinez Serna, Juan Esteban"]
[Black "Torres Puentes, Camila"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "1780"]
[BlackElo "1439"]
[PlyCount "49"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 cxd4 7. Bb5+ Bd7 8. exd5 dxc3 9. dxe6 fxe6 10. Bxd7+ Qxd7 11. Qb3 cxb2 12. Bxb2 Qd5 13. 0-0 Qxb3 14. axb3 Nc6 15. Rfe1 Kd7 16. Rad1+ Kc7 17. Ng5 Nd8 18. Be5+ Kc6 19. Rc1+ Kd5 20. Bg3 Nc6 21. Red1+ Nd4 22. Nf3 Bc5 23. Be5 Ke4 24. Bxd4 Bxd4 25. Rxd4+ 1-0

[Event "Medellin Flores op 30th"]
[Site "Medellin"]
[Date "2023.08.03"]
[Round "1"]
[White "Martinez Serna, Juan Esteban"]
[Black "Ruiz, Luz Alba"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1780"]
[BlackElo "1188"]
[PlyCount "57"]
[EventDate "2023.08.03"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 c6 6. h3 e6 7. Nf3 Nbd7 8. Bd3 Bb4 9. 0-0 0-0 10. e5 Nd5 11. Bxh7+ Kh8 12. Nxd5 cxd5 13. Ng5 g6 14. Qg4 Be7 15. Qh4 Bxg5 16. Bxg5 Qxg5 17. Qxg5 Kxh7 18. Rac1 b6 19. Rc3 Ba6 20. Rfc1 Rfe8 21. h4 Be2 22. Re3 Bc4 23. h5 Nf8 24. Rh3 Kg7 25. Qf6+ Kg8 26. hxg6 Nxg6 27. Rcc3 Rac8 28. Rcg3 Rc7 29. Rh8# 1-0

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.11"]
[Round "7"]
[White "Martinez Serna, Juan Esteban"]
[Black "Moncada, Jose Manuel"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1492"]
[PlyCount "17"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Bf4 Bf5 6. Qb3 Qd7 7. e3 e6 8. Bxb8 Be7 9. Bb5 1-0

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.11"]
[Round "6"]
[White "Narvaez Berrio, Alexander"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1352"]
[BlackElo "1492"]
[PlyCount "50"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 Nc6 5. Nd2 Bf5 6. h3 e6 7. Ngf3 h6 8. Be2 Bd6 9. Ne5 0-0 10. Ndf3 Qc7 11. Bd3 Ne4 12. dxc5 Bxe5 13. Nxe5 Nxe5 14. Bc2 Nxc5 15. Bxf5 exf5 16. Qxd5 Ned3+ 17. Kf1 Nxf4 18. exf4 Ne6 19. Qxf5 Qxf4 20. Qb5 Rad8 21. Kg1 Rd2 22. Rf1 Rfd8 23. Qxb7 Rxf2 24. Qb5 Rxg2+ 25. Kxg2 Rd2+ 0-1

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.10"]
[Round "5"]
[White "Martinez Serna, Juan Esteban"]
[Black "Gonzalez Zapata, Julian David"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "1492"]
[BlackElo "1707"]
[PlyCount "116"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Bf4 a6 6. e3 Nc6 7. Bd3 e6 8. Rc1 Qb6 9. Qe2 Bd7 10. Nf3 Be7 11. Ne5 Rc8 12. 0-0 0-0 13. Bg5 Qd8 14. f4 g6 15. Rf3 Nxe5 16. fxe5 Ne4 17. Bh6 Nxc3 18. bxc3 Re8 19. Qf2 Bf8 20. Bxf8 Rxf8 21. Rh3 Qe7 22. Qf4 f6 23. exf6 Qxf6 24. Qxf6 Rxf6 25. Rf3 Rxf3 26. gxf3 Kf7 27. Kf2 Kf6 28. e4 e5 29. Ke3 exd4+ 30. Kxd4 dxe4 31. fxe4 Be6 32. Rb1 Rd8+ 33. Ke3 Rd7 34. Rb6 Ke5 35. a4 h5 36. Be2 Rc7 37. Bd3 g5 38. Rb4 h4 39. Rb2 g4 40. Rb1 Bc8 41. Kd2 Rf7 42. Re1 Bd7 43. a5 Bc6 44. Be2 g3 45. hxg3 hxg3 46. Rg1 Rg7 47. Ke3 Bxe4 48. Bd3 Bxd3 49. Kxd3 g2 50. Kc4 Kf4 51. Kc5 Kf3 52. Kb6 Kf2 53. Rc1 g1Q 54. Rxg1 Kxg1 55. c4 Kf2 56. c5 Ke3 57. c6 bxc6 58. Kxa6 Kd4 0-1

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.10"]
[Round "4"]
[White "Siabato, Abril"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D13"]
[BlackElo "1492"]
[PlyCount "74"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. Nf3 Nf6 6. e3 a6 7. Qb3 Na5 8. Qc2 Nc6 9. a3 Bg4 10. Be2 Rc8 11. Nc3 e6 12. Qd2 Be7 13. Ne5 Bxe2 14. Nxc6 Rxc6 15. Qxe2 0-0 16. 0-0 Qb6 17. Rac1 Rfc8 18. Na2 Qb3 19. Rxc6 Rxc6 20. Nc1 Qa4 21. Qd1 Qb5 22. Nd3 Ne4 23. f3 Nd6 24. Bxd6 Bxd6 25. e4 Rc4 26. exd5 Rxd4 27. dxe6 Qxd3 28. Qc1 Rc4 29. Qe1 Qd4+ 30. Kh1 Qh4 31. g3 Qe7 32. exf7+ Kxf7 33. Qb1 Qe2 34. Qf5+ Ke8 35. Qb1 Kd8 36. Rc1 Qxf3+ 37. Kg1 Bc5# 0-1

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.09"]
[Round "3"]
[White "Martinez Serna, Juan Esteban"]
[Black "Zapata Cuartas, Juan Carlos"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1492"]
[BlackElo "2014"]
[PlyCount "72"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 bxc4 5. e4 d6 6. Bxc4 g6 7. f4 Bg7 8. Nf3 0-0 9. Nc3 Ba6 10. Bxa6 Nxa6 11. 0-0 Nb4 12. Qe2 Qb6 13. Bd2 c4+ 14. Be3 Qa6 15. Nd4 Nd3 16. Rfd1 Nh5 17. g3 Qb6 18. Ndb5 Qb7 19. Rab1 Nf6 20. b3 a6 21. bxc4 axb5 22. Rxb5 Nxf4 23. gxf4 Qd7 24. Bd4 Nh5 25. Bxg7 Nxf4 26. Qf3 Nh3+ 27. Kg2 Ng5 28. Qg3 Nxe4 29. Nxe4 Kxg7 30. Ra1 Rfc8 31. Qc3+ Kg8 32. h3 f5 33. Ng5 Qxb5 34. Qd4 Qxc4 35. Ne6 Qxd4 36. Nxd4 Rc5 0-1

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.09"]
[Round "2"]
[White "Sanchez, Kevin"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1766"]
[BlackElo "1492"]
[PlyCount "48"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 Nf6 3. Nf3 c5 4. c3 Nc6 5. e3 Bf5 6. Nbd2 e6 7. Ne5 Be7 8. f3 0-0 9. g4 Bg6 10. h4 h5 11. Nxg6 fxg6 12. g5 Nd7 13. Bd3 Qe8 14. Qc2 Kh7 15. Bg3 e5 16. Rf1 exd4 17. exd4 Bd6+ 18. Ne4 Bxg3+ 19. Kd1 dxe4 20. fxe4 cxd4 21. cxd4 Nxd4 22. Qd2 Rxf1+ 23. Bxf1 Qxe4 24. Bd3 Qh1+ 0-1

[Event "Medellin Aristizabal Cup"]
[Site "Medellin"]
[Date "2022.07.08"]
[Round "1"]
[White "Martinez Serna, Juan Esteban"]
[Black "Ramos Ariza, Juan Manuel"]
[Result "0-1"]
[ECO "E19"]
[WhiteElo "1492"]
[BlackElo "1969"]
[PlyCount "88"]
[EventDate "2022.07.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. Nc3 Ne4 7. 0-0 0-0 8. Qc2 Nxc3 9. Qxc3 f5 10. b3 c5 11. Bb2 Bf6 12. Qd2 Na6 13. Rfd1 d5 14. Ne5 Qc7 15. cxd5 Rad8 16. Rac1 Bxd5 17. Qe3 Bxg2 18. Kxg2 Bxe5 19. Qxe5 Qxe5 20. dxe5 Nb4 21. a3 Nd5 22. Rd3 Rd7 23. f3 Rfd8 24. Kf2 Kf7 25. e4 fxe4 26. fxe4 Ne7 27. Rxd7 Rxd7 28. Ke3 Ke8 29. b4 Rc7 30. bxc5 Rxc5 31. Rxc5 bxc5 32. Kd3 Kd7 33. Kc4 Kc6 34. a4 Ng6 35. h4 h5 36. a5 a6 37. Bc3 Nh8 38. Bd2 Nf7 39. Bf4 Nh6 40. Be3 Nf7 41. Bf4 g6 42. Kb3 Kb5 43. Kc3 Kxa5 44. Kb3 Kb5 0-1

[Event "COL-ch U18 final"]
[Site "Medellin"]
[Date "2021.06.20"]
[Round "7"]
[White "Martinez Serna, Juan Esteban"]
[Black "Ruiz Jaraba, Valentina Sofia"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1426"]
[BlackElo "1656"]
[PlyCount "72"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e4 b5 7. Be2 a6 8. 0-0 Bb7 9. Qc2 Nf6 10. Bg5 h6 11. Bh4 Be7 12. e5 Nd5 13. Bxe7 Qxe7 14. Ne4 0-0 15. Nd6 Qc7 16. Nd2 Nd7 17. N2e4 N5b6 18. a5 Nd5 19. Ra3 c5 20. Qd2 cxd4 21. Qxd4 Rab8 22. f4 Nb4 23. Qd2 Nc5 24. Nf6+ gxf6 25. Qxb4 Be4 26. Rg3+ Kh7 27. Bh5 Nd3 28. Qc3 Qc5+ 29. Kh1 Nf2+ 30. Rxf2 Qxf2 31. Qc1 Bg6 32. Bxg6+ fxg6 33. f5 g5 34. fxe6 fxe5 35. Qb1+ Kg7 36. e7 Qf1+ 0-1

[Event "COL-ch U18 final"]
[Site "Medellin"]
[Date "2021.06.19"]
[Round "6"]
[White "Martinez Serna, Juan Esteban"]
[Black "Loaiza Cuervo, Santiago"]
[Result "1/2-1/2"]
[ECO "E87"]
[WhiteElo "1426"]
[BlackElo "1767"]
[PlyCount "147"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[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. Qd2 f5 9. exf5 gxf5 10. Bd3 a5 11. Nge2 Na6 12. 0-0 Bd7 13. Rab1 Kh8 14. Kh1 Rg8 15. b3 Bf6 16. a3 Bh4 17. g3 Rg7 18. gxh4 Qxh4 19. Rg1 Rxg1+ 20. Rxg1 f4 21. Nxf4 Nxf4 22. Bxf4 Qxf4 23. Qxf4 exf4 24. Ne4 Rf8 25. Rg5 Bf5 26. Kg1 h6 27. Rg2 Rg8 28. Rxg8+ Kxg8 29. Kf2 Kg7 30. Ke2 Bxe4 31. Bxe4 Kf6 32. Kd2 Nc5 33. Bc2 b6 34. Kc3 Ke5 35. b4 axb4+ 36. axb4 Nb7 37. Be4 Nd8 38. Bg6 Nb7 39. h4 Nd8 40. Kd3 Nb7 41. Be8 Nd8 42. Bg6 Nb7 43. Be8 Nd8 44. Bg6 c6 45. Be4 c5 46. bxc5 dxc5 47. Bg6 Nb7 48. Be8 Na5 49. Ba4 Nb7 50. Be8 Na5 51. Ba4 Nb7 52. Be8 Nd6 53. Bg6 b5 54. cxb5 c4+ 55. Kc3 Kxd5 56. Kb4 Kd4 57. b6 c3 58. Bc2 Nb7 59. Be4 Nd6 60. Kb3 Nxe4 61. fxe4 f3 62. b7 f2 63. b8Q f1Q 64. Qb4+ Ke3 65. Qxc3+ Kxe4 66. Qc6+ Kd4 67. Qd6+ Ke4 68. Qxh6 Qb5+ 69. Kc3 Qa5+ 70. Kc4 Qa4+ 71. Kc3 Qa5+ 72. Kc4 Qa4+ 73. Kc3 Qa5+ 74. Kc4 1/2-1/2

[Event "COL-ch U18 final"]
[Site "Medellin"]
[Date "2021.06.18"]
[Round "4"]
[White "Martinez Serna, Juan Esteban"]
[Black "Ceballos Castellanos, Isabela"]
[Result "1-0"]
[ECO "D87"]
[WhiteElo "1426"]
[BlackElo "1473"]
[PlyCount "111"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 0-0 9. 0-0 Nc6 10. Be3 Qc7 11. Qc1 Rd8 12. Rd1 Na5 13. Bd3 b6 14. Qa3 Be6 15. d5 Bd7 16. Rab1 e6 17. Bg5 Re8 18. Bf4 Qc8 19. dxe6 Rxe6 20. Rd2 Bc6 21. f3 Be5 22. Bxe5 Rxe5 23. Rbd1 Qc7 24. Qb2 Ba4 25. Re1 Rd8 26. Nf4 Bc6 27. Bf1 Ree8 28. Red1 Ba4 29. Nd5 Rxd5 30. Rxd5 Bxd1 31. Rxd1 Rd8 32. Rd5 Rxd5 33. exd5 Qe5 34. Qd2 Nb7 35. c4 Nd6 36. g3 Nf5 37. Kf2 Kg7 38. f4 Qf6 39. Be2 Nd6 40. Qe3 a6 41. a4 g5 42. Qe5 gxf4 43. gxf4 Nf5 44. Bd3 Nd6 45. Ke3 b5 46. axb5 axb5 47. cxb5 c4 48. Be2 Nf5+ 49. Kd2 Kg6 50. Bh5+ Kg7 51. b6 Nd6 52. Kc3 Qxe5+ 53. fxe5 Nb7 54. Bg4 f6 55. exf6+ Kxf6 56. Bc8 1-0

[Event "COL-ch U18 final"]
[Site "Medellin"]
[Date "2021.06.17"]
[Round "3"]
[White "Salazar Grisales, Juan Jose"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1849"]
[BlackElo "1426"]
[PlyCount "91"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c6 3. Nf3 d5 4. g3 Bf5 5. Nc3 e6 6. Nh4 Bg6 7. Nxg6 hxg6 8. Qd3 Nbd7 9. Bg2 Be7 10. 0-0 0-0 11. Rd1 Qc7 12. Bg5 dxc4 13. Qxc4 Nb6 14. Qb3 Nfd5 15. Bxe7 Qxe7 16. e4 Nxc3 17. bxc3 Rfd8 18. a4 Qc7 19. a5 Nd7 20. e5 Rab8 21. Qc4 c5 22. f4 b6 23. axb6 axb6 24. Rab1 Rbc8 25. d5 exd5 26. Bxd5 Nf8 27. e6 Nxe6 28. Bxe6 fxe6 29. Qxe6+ Kh7 30. Rxd8 Qxd8 31. Rxb6 Qd1+ 32. Kg2 Qc2+ 33. Kh3 Rd8 34. f5 Qxf5+ 35. Qxf5 gxf5 36. Rc6 Rd5 37. Kh4 Re5 38. Kg5 Rd5 39. Kf4 Kg8 40. Rc7 Kh7 41. Kg5 Re5 42. c4 Re2 43. Rxc5 Rxh2 44. Rxf5 Rc2 45. c5 Rc3 46. g4 1-0

[Event "COL-ch U18 final"]
[Site "Medellin"]
[Date "2021.06.17"]
[Round "2"]
[White "Sanchez Arroyave, Juan Pablo"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1964"]
[BlackElo "1426"]
[PlyCount "79"]
[EventDate "2021.06.16"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Be7 6. e3 Nbd7 7. cxd5 exd5 8. Bd3 Ne4 9. Bxe7 Qxe7 10. Qc2 f5 11. 0-0 0-0 12. Nd2 Ndf6 13. Rab1 a5 14. Nf3 Nd7 15. a3 b6 16. b4 axb4 17. axb4 Bb7 18. Rfc1 Ra3 19. Ne2 Rfa8 20. Qd1 Qd6 21. Rb3 R8a4 22. Rcb1 Ra2 23. Qc1 g6 24. h4 Ndf6 25. R3b2 Rxb2 26. Qxb2 Ng4 27. Bc2 Ra8 28. Bxe4 fxe4 29. Ne5 Nf6 30. Nf4 Ra4 31. Qb3 Ra8 32. Rc1 Nd7 33. Nxd7 Qxd7 34. Qd1 Ba6 35. Ra1 Qc8 36. Rc1 Bc4 37. b5 Ra2 38. bxc6 Qxc6 39. Qg4 Ra7 40. Qg5 1-0

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.14"]
[Round "7"]
[White "Cantero Gonzalez, Mauricio Rafael"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B34"]
[BlackElo "1426"]
[PlyCount "98"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 Nc6 6. Nb3 g6 7. 0-0 Bg7 8. Nc3 0-0 9. Bg5 h6 10. Be3 Ng4 11. Qe2 Nxe3 12. fxe3 Ne5 13. h3 Be6 14. Nd4 Bd7 15. Rf2 Rc8 16. Raf1 a6 17. Qd2 b5 18. Nf3 Nxd3 19. cxd3 Bc6 20. d4 b4 21. Nd5 a5 22. Qd3 f5 23. Nd2 e6 24. Nf4 Qe8 25. exf5 exf5 26. Re1 Kh8 27. Nb3 g5 28. Ne2 a4 29. Nd2 Bb5 30. Qb1 Qxe3 31. Nf3 Bxe2 32. Rexe2 Rc1+ 33. Kh2 Qxe2 34. Qxc1 Qxf2 35. Qc6 g4 36. hxg4 fxg4 37. Ng1 g3+ 38. Kh3 Qxg1 39. Qxd6 Qh1+ 40. Kxg3 Qe1+ 41. Kh2 Rf1 42. Kh3 Rh1+ 43. Kg4 Qh4+ 44. Kf5 Rf1+ 45. Ke6 Qe4+ 46. Kd7 Rf7+ 47. Kc8 Qa8+ 48. Qb8 Qc6+ 49. Kd8 Qd7# 0-1

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.13"]
[Round "5"]
[White "Cuervo Velasquez, Juan Manuel"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "1151"]
[BlackElo "1426"]
[PlyCount "108"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. c4 Ngf6 6. Nc3 g6 7. 0-0 Bg7 8. d3 0-0 9. h3 Rb8 10. Be3 Qa5 11. a4 Rfc8 12. Nh2 Ne5 13. f4 Nc6 14. Qe1 Nd4 15. Rc1 Nd7 16. Qh4 Bf6 17. Qg4 e6 18. f5 Ne5 19. Qd1 Qd8 20. fxe6 fxe6 21. Ng4 Nxg4 22. Qxg4 Qe7 23. Rf2 Rf8 24. Rcf1 Qg7 25. Kh1 Be5 26. Bxd4 Bxd4 27. Qxe6+ Kh8 28. Rf7 Bxc3 29. bxc3 Rxf7 30. Rxf7 Qe5 31. Qd7 Kg8 32. Re7 Qf6 33. Qe6+ Qxe6 34. Rxe6 Rd8 35. Re7 Rf8 36. Kg1 Rf7 37. Rxf7 Kxf7 38. Kf2 Ke6 39. Ke3 g5 40. g4 b6 41. d4 h6 42. Kf3 a6 43. Kg3 Kf6 44. h4 Ke6 45. h5 Kf6 46. Kf3 Ke6 47. Ke3 Kf6 48. e5+ dxe5 49. d5 Ke7 50. Kf3 Kf7 51. Ke4 Kf6 52. Kf3 Kf7 53. Ke3 Ke7 54. Ke4 Kf6 1/2-1/2

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.13"]
[Round "6"]
[White "Martinez Serna, Juan Esteban"]
[Black "De la Hoz, Rafael"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "1426"]
[BlackElo "1686"]
[PlyCount "63"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d6 2. c4 g6 3. Nc3 Nf6 4. e4 Nbd7 5. Be3 c6 6. f3 Qc7 7. Qd2 h5 8. Be2 b6 9. Nh3 Bg7 10. Nf2 Bb7 11. h4 a6 12. a4 c5 13. d5 Ne5 14. 0-0 Bc8 15. Rab1 Bd7 16. b4 0-0 17. bxc5 bxc5 18. Rb3 Rfb8 19. Rfb1 e6 20. Qb2 Rxb3 21. Qxb3 exd5 22. exd5 Ne8 23. Nfe4 Bf5 24. Qb7 Qd8 25. Bg5 f6 26. Be3 Nd7 27. Qc6 Bxe4 28. Nxe4 Rc8 29. Qxa6 Ra8 30. Qc6 Rc8 31. Qa6 Ra8 32. Qc6 1/2-1/2

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.12"]
[Round "4"]
[White "Martinez Serna, Juan Esteban"]
[Black "Narvaez Berrio, Alexander"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1426"]
[BlackElo "1383"]
[PlyCount "131"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 a6 8. Qc2 h6 9. Bh4 Nc6 10. a3 Re8 11. Nf3 Bg4 12. Nd2 Be6 13. 0-0 Ng4 14. Bg3 Bd6 15. Na4 Bxg3 16. hxg3 Qg5 17. Nf3 Qd8 18. Nc5 Bc8 19. Rac1 Ne7 20. Rfe1 c6 21. b4 Kh8 22. a4 Rb8 23. b5 axb5 24. axb5 Be6 25. Ra1 Qc7 26. Ra7 Qb6 27. Qa2 Nc8 28. Ra8 Rxa8 29. Qxa8 Nd6 30. Qa3 cxb5 31. Rb1 Nc4 32. Qb4 Nd6 33. Nxe6 fxe6 34. Rc1 Ra8 35. Nh2 Nxh2 36. Kxh2 g5 37. Rc5 Ra4 38. Qb3 Ra5 39. Qb4 Kg7 40. f3 Kf6 41. e4 Ra4 42. e5+ Kf7 43. Qb3 Rxd4 44. Qc2 Nc4 45. Bg6+ Ke7 46. Rc8 Nxe5 47. Re8+ Kd6 48. Qc8 Nxf3+ 49. gxf3 Rh4+ 50. Kg2 Rh2+ 51. Kxh2 Qf2+ 52. Kh3 Qf1+ 53. Kg4 Qc4+ 54. Qxc4 bxc4 55. Bf7 c3 56. Rxe6+ Kc5 57. Re2 d4 58. Bg6 b5 59. Bc2 Kc4 60. Re7 b4 61. Rc7+ Kb5 62. f4 b3 63. Bxb3 Kb4 64. Bc2 Ka3 65. f5 Kb2 66. Be4 1-0

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.11"]
[Round "3"]
[White "Luna Monsalve, Sofia"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "1197"]
[BlackElo "1426"]
[PlyCount "43"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 Nc6 6. e3 a6 7. Bd3 e6 8. Nf3 Bd6 9. Bg3 0-0 10. 0-0 b5 11. Rc1 Bxg3 12. hxg3 Qd6 13. e4 dxe4 14. Nxe4 Nxe4 15. Bxe4 Bb7 16. Bxh7+ Kxh7 17. Ng5+ Kg6 18. Qg4 Qxd4 19. Ne4+ Kh7 20. Rxc6 Qd5 21. Qh4+ Kg6 22. Rc5 1-0

[Event "COL-ch Cat D U1800"]
[Site "Medellin"]
[Date "2021.06.10"]
[Round "1"]
[White "Padilla Ordonez, Daniel Eduardo"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "D46"]
[WhiteElo "1708"]
[BlackElo "1426"]
[PlyCount "45"]
[EventDate "2021.06.10"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 b5 9. Bd3 Bb7 10. e4 e5 11. Bg5 h6 12. Bh4 Qe7 13. 0-0 0-0 14. dxe5 Nxe5 15. Nxe5 Bxe5 16. f4 Bd4+ 17. Kh1 Qc5 18. Bxf6 Bxf6 19. e5 Be7 20. Qe2 f5 21. exf6 Bxf6 22. Qe6+ Rf7 23. Bg6 1-0

[Event "Medellin Antioquia 2nd League"]
[Site "Medellin"]
[Date "2021.??.??"]
[Round "3"]
[White "Aristizabal Lopez, Jorge Alberto"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B53"]
[WhiteElo "1863"]
[BlackElo "1453"]
[PlyCount "82"]
[EventDate "2021.08.31"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. Bb5+ Bd7 5. Bxd7+ Qxd7 6. dxc5 dxc5 7. Qxd7+ Nfxd7 8. 0-0 Nc6 9. c3 g6 10. Bf4 Bg7 11. Nbd2 0-0 12. Rad1 Rfd8 13. Nb3 c4 14. Nc1 Nde5 15. Nxe5 Nxe5 16. Bxe5 Bxe5 17. Ne2 Kg7 18. f4 Bd6 19. Kf2 Bc5+ 20. Kf3 b5 21. a3 a5 22. g4 b4 23. axb4 axb4 24. cxb4 Bxb4 25. Nc3 Bxc3 26. bxc3 Rxd1 27. Rxd1 Ra3 28. Rc1 Ra2 29. h4 Rd2 30. e5 Rd3+ 31. Ke4 h5 32. gxh5 gxh5 33. Rc2 Rh3 34. Kd4 Rxh4 35. Rf2 Kg6 36. Kxc4 Kf5 37. Kd5 Rxf4 38. Rh2 e6+ 39. Kc5 h4 40. c4 Kxe5 41. Kb5 Kd6 0-1

[Event "Medellin Antioquia 2nd League"]
[Site "Medellin"]
[Date "2021.??.??"]
[Round "7"]
[White "Cuervo Velasquez, Juan Manuel"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "1189"]
[BlackElo "1453"]
[PlyCount "65"]
[EventDate "2021.08.31"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. d4 cxd4 6. Qxd4 Ngf6 7. c4 g6 8. Nc3 Bg7 9. 0-0 0-0 10. Qd3 Rc8 11. Rb1 Ng4 12. b3 Nge5 13. Nxe5 Nxe5 14. Qc2 a6 15. a4 Qa5 16. Bd2 Nc6 17. Nd5 Qd8 18. a5 Bd4 19. Qd3 e6 20. Nb4 Bg7 21. Nxc6 Rxc6 22. Rfd1 Qc7 23. Bb4 Rd8 24. Kh1 Bf6 25. f4 Be7 26. f5 exf5 27. exf5 d5 28. Bxe7 Qxe7 29. cxd5 Rcd6 30. fxg6 hxg6 31. Rbc1 Rxd5 32. Qxd5 Rxd5 33. Rxd5 1/2-1/2

[Event "Medellin Antioquia 2nd League"]
[Site "Medellin"]
[Date "2021.??.??"]
[Round "5"]
[White "Gomez Rondon, Samuel"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "B77"]
[WhiteElo "1690"]
[BlackElo "1453"]
[PlyCount "86"]
[EventDate "2021.08.31"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 0-0 9. Bc4 Nd7 10. 0-0-0 Nb6 11. Bb3 Na5 12. Qe2 Bd7 13. g4 Rc8 14. h4 Nbc4 15. Bf2 h6 16. Bg3 Nxb3+ 17. axb3 Ne5 18. h5 g5 19. Nf5 Bxf5 20. exf5 Qa5 21. Nd5 Qa1+ 22. Kd2 Qxb2 23. Nxe7+ Kh8 24. Nxc8 Rxc8 25. Rc1 Qc3+ 26. Kd1 Rc5 27. Qe4 d5 28. Bxe5 Bxe5 29. Qd3 Qb2 30. c4 Bf4 31. Qc3+ Be5 32. Qxb2 Bxb2 33. Rc2 Be5 34. cxd5 Rxd5+ 35. Ke2 Rb5 36. Rb1 a5 37. Ra2 b6 38. Ra4 Bc3 39. Rc4 Be5 40. Kd3 Kg7 41. Ke4 f6 42. Rd1 Kf8 43. Rd7 Ke8 1-0

[Event "Medellin Antioquia 2nd League"]
[Site "Medellin"]
[Date "2021.??.??"]
[Round "2"]
[White "Martinez Serna, Juan Esteban"]
[Black "Bermudez, Edilson Enrique"]
[Result "1-0"]
[ECO "A57"]
[WhiteElo "1453"]
[BlackElo "1649"]
[PlyCount "127"]
[EventDate "2021.08.31"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Qc2 d6 5. Nf3 g6 6. e4 bxc4 7. Bxc4 Bg7 8. 0-0 0-0 9. h3 Ba6 10. Bg5 Bxc4 11. Qxc4 Qb6 12. Nc3 Nbd7 13. Rab1 Rab8 14. Rfe1 h6 15. Bh4 g5 16. Bg3 Nh5 17. Bh2 Nf4 18. h4 Ne5 19. Nxe5 Bxe5 20. g3 Ng6 21. h5 Nh8 22. f4 Bd4+ 23. Kh1 Qb7 24. g4 f6 25. b3 Qd7 26. f5 Rb4 27. Qd3 Nf7 28. a3 Rb7 29. Ne2 Be5 30. Bg1 Rfb8 31. Rec1 a5 32. a4 Rb4 33. Be3 Qb7 34. Nc3 Rxb3 35. Rxb3 Qxb3 36. Rb1 Qxc3 37. Rxb8+ Kg7 38. Qxc3 Bxc3 39. Re8 Ne5 40. Rxe7+ Kg8 41. Re6 Nxg4 42. Bg1 Be5 43. Re8+ Kf7 44. Ra8 Bc3 45. Ra7+ Ke8 46. Kg2 Ne5 47. Rh7 Nf7 48. Rg7 Kf8 49. Rg6 Ke7 50. Bh2 Kf8 51. Kf2 Bd4+ 52. Ke2 c4 53. Bg3 c3 54. Kd3 Ne5+ 55. Bxe5 Bxe5 56. Rxh6 Kg7 57. Rg6+ Kh7 58. h6 g4 59. Rxg4 Kxh6 60. Rg8 Kh5 61. Ra8 Kg4 62. Rxa5 Kf4 63. Ra6 c2 64. Rc6 1-0

[Event "Medellin Antioquia 2nd League"]
[Site "Medellin"]
[Date "2021.??.??"]
[Round "4"]
[White "Martinez Serna, Juan Esteban"]
[Black "Garces Trujillo, Luis Javier"]
[Result "0-1"]
[ECO "D26"]
[WhiteElo "1453"]
[BlackElo "1841"]
[PlyCount "58"]
[EventDate "2021.08.31"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "COL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 c5 6. 0-0 Nc6 7. Nc3 cxd4 8. exd4 Be7 9. h3 0-0 10. Be3 Na5 11. Bd3 b6 12. Rc1 Bb7 13. Ne5 Rc8 14. Re1 Nc6 15. Bb5 Nb4 16. Qe2 Nbd5 17. Nxd5 Qxd5 18. f3 Qd6 19. Ba6 Rxc1 20. Rxc1 Bxa6 21. Qxa6 Nd5 22. Bd2 Nf4 23. Nc6 Bf6 24. Bxf4 Qxf4 25. Qc4 Qg3 26. Rc2 Bg5 27. Qc3 Bf4 28. Ne7+ Kh8 29. Qc8 Qe1# 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.17"]
[Round "9"]
[White "Giraldo, Emanuel"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "1557"]
[PlyCount "69"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. d4 cxd4 6. Qxd4 Ngf6 7. c4 e6 8. Nc3 Be7 9. 0-0 0-0 10. Re1 Rc8 11. b3 Nc5 12. Qd1 Qc7 13. Bf4 e5 14. Bg5 Ne6 15. Bxf6 Bxf6 16. Nb5 Qb6 17. Qxd6 Rc6 18. Qd2 Rd8 19. Qb2 Nc5 20. Qe2 Qa5 21. Qc2 Na6 22. Nxa7 Rc5 23. Qe2 Nc7 24. Nb5 Nxb5 25. cxb5 Rxb5 26. Red1 Rc8 27. Rac1 Rbc5 28. Rxc5 Qxc5 29. h3 h6 30. Qd3 Rd8 31. Qe2 Rc8 32. Nh2 Be7 33. Nf1 Qb4 34. Ng3 g6 35. Qd2 1/2-1/2

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.16"]
[Round "8"]
[White "Malagon Guzman, Juan Daniel"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B77"]
[WhiteElo "1439"]
[PlyCount "60"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. f3 0-0 8. Be3 Nc6 9. Qd2 Nd7 10. 0-0-0 Nb6 11. Bb3 Na5 12. Bh6 Nbc4 13. Bxc4 Nxc4 14. Qg5 e5 15. Nb3 Bf6 16. Qg3 Bh4 17. Bxf8 Kxf8 18. Rxd6 Qe7 19. Nd5 Bxg3 20. Nxe7 Bf4+ 21. Kb1 Nxd6 22. Nd5 Be6 23. g3 Bxd5 24. gxf4 Bxb3 25. fxe5 Bxa2+ 26. Kxa2 Nc4 27. f4 Rd8 28. c3 Rd2 29. Kb3 b5 30. Rb1 Rxh2 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.16"]
[Round "7"]
[White "Martinez Serna, Juan Esteban"]
[Black "Brito Carrascal, Camilo Andres"]
[Result "0-1"]
[ECO "E43"]
[BlackElo "1603"]
[PlyCount "78"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Ne4 6. Qc2 Bb7 7. Bd3 f5 8. 0-0 Bxc3 9. bxc3 0-0 10. Nd2 Qh4 11. f3 Nxd2 12. Bxd2 Nc6 13. e4 f4 14. e5 Na5 15. Qa4 Bc6 16. Qb4 Nb7 17. Rae1 Rf7 18. Be4 Bxe4 19. Rxe4 c5 20. Qb1 Raf8 21. g3 Qh5 22. Rxf4 Rxf4 23. Bxf4 g5 24. g4 Qh3 25. Bg3 Qh6 26. Qe4 Na5 27. d5 Qg6 28. Qe2 Qf7 29. d6 Qe8 30. f4 gxf4 31. Bxf4 Qg6 32. h3 Nc6 33. Kh2 Nd8 34. h4 Nf7 35. h5 Qg7 36. Qe3 h6 37. Rg1 Ng5 38. Bxg5 Qxg5 39. Qe4 Qh4+ 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.15"]
[Round "6"]
[White "Molina Ballesteros, Juan Sebastian"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B77"]
[WhiteElo "1530"]
[PlyCount "124"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. Bc4 Nd7 10. 0-0-0 Nb6 11. Bb3 Na5 12. g4 Nbc4 13. Bxc4 Nxc4 14. Qe2 Nxe3 15. Qxe3 Bd7 16. h4 h6 17. g5 h5 18. f4 Bg4 19. Rdf1 Qb6 20. e5 dxe5 21. fxe5 Rad8 22. Rf4 f6 23. exf6 exf6 24. Na4 Qd6 25. Nf3 fxg5 26. Rxf8+ Rxf8 27. Nxg5 Qf4 28. Qxf4 Rxf4 29. Nc5 Bf5 30. c3 Rf2 31. Nce4 Re2 32. Ng3 Rc2+ 33. Kb1 Rh2+ 34. Kc1 Rxh1+ 35. Nxh1 Be5 36. Kd2 Bf4+ 37. Ke2 Bc1 38. b4 b5 39. Kd1 Bf4 40. Ke2 Kg7 41. Nf2 Be5 42. Nfe4 Bxe4 43. Nxe4 Kf7 44. Kd3 Ke6 45. c4 bxc4+ 46. Kxc4 Kf5 47. Ng5 Bf6 48. Nf3 Kf4 49. Nd2 Bxh4 50. Kb5 Bf2 51. Nf1 Kf3 52. Nd2+ Kf4 53. Nf1 h4 54. a4 h3 55. Kc4 g5 56. Kd3 Kf3 57. b5 g4 58. Nh2+ Kg3 59. Nf1+ Kg2 60. Ke2 h2 61. Nxh2 Kxh2 62. Kxf2 g3+ 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.14"]
[Round "5"]
[White "Martinez Serna, Juan Esteban"]
[Black "Schnell, Sebastian Narayana"]
[Result "1/2-1/2"]
[ECO "D10"]
[BlackElo "1376"]
[PlyCount "120"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. Nc3 Nf6 6. e3 Bf5 7. Qb3 Na5 8. Qa4+ Bd7 9. Qc2 e6 10. Bd3 Rc8 11. Nge2 Be7 12. 0-0 Nc4 13. f3 Nh5 14. e4 Nxf4 15. Bxc4 Nxg2 16. Kxg2 dxc4 17. e5 Bc6 18. Kg1 Bh4 19. Ne4 Bd5 20. Nd6+ Kf8 21. Nxc8 Qxc8 22. Nc3 Qd8 23. Nxd5 exd5 24. Qf5 Ke7 25. Rad1 Qb6 26. Qh5 Qg6+ 27. Qxg6 hxg6 28. f4 Ke6 29. Rf3 Kf5 30. Rh3 Kg4 31. Kg2 Rh5 32. Rf1 Kf5 33. Kf3 b5 34. a3 a5 35. Ra1 Rh8 36. Rg1 Rh6 37. Rg4 Be7 38. Rxh6 gxh6 39. Rg1 h5 40. Rc1 Bf8 41. Rc3 a4 42. Re3 Ke6 43. Re2 Be7 44. f5+ Kxf5 45. e6 fxe6 46. Rf2 g5 47. Ke3+ Kg6 48. Ke2 Bf6 49. Ke3 Be7 50. Ke2 Bd6 51. Ke3 Bf4+ 52. Ke2 h4 53. h3 Kf5 54. Kf3 e5 55. dxe5 Kxe5 56. Re2+ Kd4 57. Re7 c3 58. bxc3+ Kxc3 59. Rb7 Kc4 60. Rd7 d4 1/2-1/2

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.14"]
[Round "4"]
[White "Ospina Betancur, Santiago"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1215"]
[PlyCount "80"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 c5 3. e3 Nc6 4. Nf3 Bf5 5. Bd3 Bxd3 6. Qxd3 Qb6 7. dxc5 Qxb2 8. Qc3 Qc1+ 9. Ke2 Qxh1 10. Na3 Qxg2 11. Qb3 0-0-0 12. Rb1 Rd7 13. Ng5 Qg4+ 14. Kd2 e5 15. Bg3 Qxg5 16. Kc1 Bxc5 17. f4 Bxa3+ 18. Qxa3 Qe7 19. Qa4 Nf6 20. fxe5 Ne4 21. e6 Rd6 22. Bxd6 Nxd6 23. exf7 Qxe3+ 24. Kd1 Qg1+ 25. Kd2 Qxb1 26. Qf4 Qb4+ 27. Qxb4 Nxb4 28. Ke3 Nxf7 29. a4 Re8+ 30. Kd4 Re4+ 31. Kc3 Rc4+ 32. Kb3 Rxc2 33. Kxb4 d4 34. h4 d3 35. Kb3 Rc6 36. h5 d2 37. h6 d1Q+ 38. Kb2 Qd3 39. hxg7 Rc2+ 40. Kb1 Qd1# 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.13"]
[Round "3"]
[White "Martinez Serna, Juan Esteban"]
[Black "Gutierrez Pama, Andres Mauricio"]
[Result "0-1"]
[ECO "E76"]
[BlackElo "1401"]
[PlyCount "72"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 Nbd7 7. e5 Ne8 8. c5 c6 9. Be3 b6 10. b4 Qc7 11. Rc1 Bb7 12. Be2 a5 13. cxd6 exd6 14. b5 c5 15. dxc5 Nxc5 16. exd6 Nxd6 17. Nd5 Bxd5 18. Qxd5 Rac8 19. Ne5 Nf5 20. Bxc5 bxc5 21. Nc6 Qxf4 22. Rc4 Bd4 23. Qf3 Qd6 24. Nxa5 Rfe8 25. Rc2 Re3 26. Nc4 Qe7 27. Nxe3 Nxe3 28. Rc1 Re8 29. a4 Qc7 30. Rd1 Qa5+ 31. Rd2 Bc3 32. Kf2 Bxd2 33. Qc6 Re6 34. Qxc5 Nf5 35. Qc8+ Kg7 36. Rd1 Qb6+ 0-1

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.12"]
[Round "2"]
[White "Aragon Trujillo, Ricardo M"]
[Black "Martinez Serna, Juan Esteban"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "1592"]
[PlyCount "131"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. c3 d5 4. exd5 Qxd5 5. d4 Nf6 6. Be2 e6 7. 0-0 Be7 8. Qc2 0-0 9. h3 Nc6 10. Rd1 cxd4 11. Nxd4 Nxd4 12. Rxd4 Qc6 13. Bf3 Qc7 14. Rd1 Bd7 15. Nd2 Bc6 16. Bxc6 Qxc6 17. Nb3 Rfd8 18. Re1 Nd5 19. Qe2 Bf6 20. Qg4 Rac8 21. Bg5 Bxg5 22. Qxg5 h6 23. Qg3 b5 24. Rac1 Qa6 25. a3 Qa4 26. Nd4 Qc4 27. Re4 Nf6 28. Nxe6 Nh5 29. Qg4 f5 30. Rxc4 fxg4 31. Rxc8 Rxc8 32. hxg4 Nf6 33. f3 Kf7 34. Nd4 a6 35. Re1 Nd5 36. g3 Nb6 37. Re6 Nc4 38. Rxa6 Nxb2 39. Nxb5 Rc5 40. Nd6+ Kg8 41. Ne4 Rc4 42. Rb6 Nd1 43. Rb3 Ne3 44. Rb4 Rc6 45. Kf2 Nd1+ 46. Ke2 Nxc3+ 47. Nxc3 Rxc3 48. a4 Ra3 49. Rf4 g5 50. Rb4 Kf7 51. Kf2 Kg7 52. Kg2 Kg6 53. Rc4 Kg7 54. f4 gxf4 55. gxf4 Kg6 56. Rc6+ Kg7 57. Ra6 Kh7 58. a5 Kg7 59. Kf2 Kh7 60. f5 Kg7 61. Rg6+ Kf7 62. Rxh6 Rxa5 63. Kg3 Kg7 64. Rb6 Ra3+ 65. Kh4 Ra4 66. Kg5 1-0

[Event "Pan American-ch School U13"]
[Site "Medellin"]
[Date "2019.11.12"]
[Round "1"]
[White "Martinez Serna, Juan Esteban"]
[Black "Campos Perilla, Sergio Felipe"]
[Result "1-0"]
[ECO "D10"]
[BlackElo "1440"]
[PlyCount "85"]
[EventDate "2019.11.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "COL"]
[SourceTitle "CBM 193 Extra"]
[Source "ChessBase"]
[SourceDate "2020.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.01.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nc6 5. Nc3 e6 6. e3 Nf6 7. Bd3 Bd6 8. Bxd6 Qxd6 9. f4 0-0 10. Nf3 Qe7 11. 0-0 Nd7 12. Ne5 Ndxe5 13. fxe5 f6 14. Qh5 g6 15. exf6 Rxf6 16. Qh6 Qg7 17. Qg5 Rxf1+ 18. Rxf1 Bd7 19. Nxd5 exd5 20. Qxd5+ Kh8 21. Rf7 Qg8 22. Qxd7 Rf8 23. Rxf8 Qxf8 24. Qxb7 Qe8 25. Kf2 Qf8+ 26. Ke2 Qe8 27. Kd2 Ne7 28. Qe4 Qf8 29. Qe5+ Qg7 30. Qb8+ Qg8 31. Qxg8+ Kxg8 32. e4 Kf7 33. Ke3 h6 34. h4 Nc6 35. g4 Nb4 36. g5 h5 37. Bc4+ Ke7 38. Kf4 Nc2 39. Ke5 Ne3 40. Be2 Ng2 41. Bf3 Nxh4 42. Bh1 Kd7 43. Kf4 1-0

[Event "COL-ch U12 sf1"]
[Site "Duitama"]
[Date "2019.04.13"]
[Round "4.12"]
[White "Torres, Juan Nicolas"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B52"]
[PlyCount "150"]
[EventDate "2019.04.11"]
[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. d4 cxd4 3. Nf3 d6 4. Bb5+ Bd7 5. Bxd7+ Nxd7 6. Qxd4 Ngf6 7. Nc3 Qc7 8. 0-0 g6 9. Qd3 Bg7 10. Re1 0-0 11. Bg5 Nc5 12. Qd2 Ncd7 13. Bh6 a6 14. Bxg7 Kxg7 15. Nd5 Nxd5 16. exd5 Nf6 17. b3 Rac8 18. c4 Rfe8 19. Rec1 Qd7 20. Qg5 b5 21. Nd2 bxc4 22. bxc4 Qg4 23. Qxg4 Nxg4 24. h3 Ne5 25. f4 Nd3 26. Rf1 Rb8 27. Rf3 Nc5 28. Rb1 Rxb1+ 29. Nxb1 Rb8 30. Rf1 Rb2 31. Nc3 Rb4 32. Re1 Rxc4 33. Nb1 Kf6 34. g3 Rd4 35. Nc3 Rd3 36. Ne4+ Nxe4 37. Rxe4 Rxg3+ 38. Kh2 Ra3 39. Re2 Rd3 40. Rb2 Rxd5 41. Rb6 Rd2+ 42. Kg3 Rxa2 43. Rb1 a5 44. Kf3 a4 45. Ke3 a3 46. Ke4 Rh2 47. Rb3 a2 48. Ra3 Rxh3 49. Rxa2 h5 50. Rg2 Ra3 51. Rh2 Ra4+ 52. Kf3 Kf5 53. Rh4 e5 54. Rh1 Rxf4+ 55. Ke3 d5 56. Ra1 h4 57. Ra7 Kg5 58. Ra2 h3 59. Rh2 Kg4 60. Rh1 Rf3+ 61. Ke2 Rg3 62. Kf2 Rg2+ 63. Kf1 Kg3 64. Ke1 h2 65. Kf1 Kf3 66. Ke1 Rg1+ 67. Rxg1 hxg1Q+ 68. Kd2 Qe3+ 69. Kc2 d4 70. Kb2 Qc3+ 71. Ka2 Qb4 72. Ka1 Ke3 73. Ka2 Kd2 74. Ka1 Kc2 75. Ka2 Qb2# 0-1

[Event "COL-ch U12 sf1"]
[Site "Duitama"]
[Date "2019.04.12"]
[Round "2.11"]
[White "Cruz Beltran, Ismael Josue"]
[Black "Martinez Serna, Juan Esteban"]
[Result "0-1"]
[ECO "B70"]
[WhiteElo "1226"]
[PlyCount "104"]
[EventDate "2019.04.11"]
[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 g6 6. Bg5 Bg7 7. Be2 Qa5 8. Bxf6 Bxf6 9. 0-0 Nc6 10. Bb5 Bd7 11. Bxc6 bxc6 12. Nb3 Qc7 13. Qd2 0-0 14. Rad1 a5 15. Nc5 Bg4 16. f3 Bxf3 17. Rxf3 dxc5 18. Qd7 Qxd7 19. Rxd7 Rfd8 20. Rxd8+ Rxd8 21. Kf1 Rd2 22. Rf2 Bxc3 23. bxc3 Rd1+ 24. Ke2 Ra1 25. Kd3 Rxa2 26. Kc4 Rb2 27. Kxc5 a4 28. Rd2 a3 29. Kxc6 a2 30. Rd8+ Kg7 31. Ra8 Rxc2 32. Ra3 Rxc3+ 33. Rxc3 a1Q 34. Rc5 Qa6+ 35. Kd5 Qd3+ 36. Kc6 Qxe4+ 37. Kb6 Qxg2 38. h4 Qf2 39. Kb5 Qxh4 40. Kc6 Qh1+ 41. Kb5 Qf1+ 42. Kc6 Qf3+ 43. Kb5 Qd3+ 44. Kc6 Kf6 45. Kb6 Qd4 46. Kc6 Ke6 47. Kb5 Kd6 48. Rc6+ Kd5 49. Ka6 Kxc6 50. Ka5 Qb2 51. Ka4 Kc5 52. Ka5 Qa3# 0-1

[Event "COL-ch U12 sf1"]
[Site "Duitama"]
[Date "2019.04.12"]
[Round "3.6"]
[White "Martinez Serna, Juan Esteban"]
[Black "Cabiativa, Juan Esteban"]
[Result "0-1"]
[ECO "E76"]
[BlackElo "1372"]
[PlyCount "44"]
[EventDate "2019.04.11"]
[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 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 0-0 6. Nf3 Nbd7 7. e5 Ne8 8. c5 dxc5 9. dxc5 c6 10. Be3 Qa5 11. a3 b5 12. Nd4 Qc7 13. b4 a5 14. Be2 Bb7 15. e6 Bxd4 16. Bxd4 fxe6 17. Bg4 Ng7 18. Qb3 Qxf4 19. Bxe6+ Kh8 20. Ne2 Qc7 21. Bxd7 Qxd7 22. Qc3 e6 0-1

[Event "COL-ch U12 sf1"]
[Site "Duitama"]
[Date "2019.04.11"]
[Round "1.22"]
[White "Martinez Serna, Juan Esteban"]
[Black "Sanchez Aragon, Michael Alejandro"]
[Result "1-0"]
[ECO "D07"]
[BlackElo "1500"]
[PlyCount "41"]
[EventDate "2019.04.11"]
[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 Nc6 3. Nf3 Bg4 4. cxd5 Bxf3 5. dxc6 Bxc6 6. Nc3 e6 7. e4 Bb4 8. f3 Bxc3+ 9. bxc3 Qd7 10. Bc4 0-0-0 11. 0-0 Ne7 12. Be3 Kb8 13. a4 f6 14. Qb3 b6 15. Bxe6 Qd6 16. Rfb1 Bd7 17. Bxd7 Rxd7 18. a5 Nc8 19. axb6 Nxb6 20. Qa4 c6 21. Rxb6+ 1-0

