[Event "POL-ch Universities"]
[Site "Lublin"]
[Date "2024.02.23"]
[Round "3"]
[White "Lukasiewicz, Krzysztof"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2290"]
[BlackElo "1993"]
[PlyCount "77"]
[EventDate "2024.02.23"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CB10_2024"]
[SourceDate "2024.03.06"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.06"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 g6 3. Nc3 d5 4. e3 Bg7 5. h4 h5 6. Nb5 Na6 7. Nc3 b6 8. Bb5+ Nd7 9. Qe2 Nab8 10. Nxd5 e5 11. dxe5 c6 12. e6 cxd5 13. exd7+ Bxd7 14. c3 0-0 15. Bxd7 Qxd7 16. Nf3 Nc6 17. 0-0 Rfe8 18. Rfd1 Qg4 19. Qb5 Ne7 20. Bg5 f6 21. Bf4 Rad8 22. Rd4 g5 23. Bxg5 Qe6 24. Bf4 Nc6 25. Rd2 Ne5 26. Nxe5 fxe5 27. Bg5 Rd6 28. Rad1 d4 29. cxd4 exd4 30. exd4 Rd5 31. Qb3 Kh8 32. Rd3 Qd6 33. Re3 Rg8 34. Rde1 Bxd4 35. Rf3 Bg7 36. Rf7 Rd3 37. Qc2 Rd5 38. Qe2 Qc5 39. Qxh5+ 1-0

[Event "Katowice POL-HUN 10th"]
[Site "Katowice"]
[Date "2023.09.10"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Perez Rodriguez, Jennifer"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1993"]
[BlackElo "2242"]
[PlyCount "97"]
[EventDate "2023.09.09"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[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. Nbd2 e6 5. e3 Nbd7 6. Bd3 Be7 7. b3 0-0 8. 0-0 c5 9. Bb2 b6 10. Qe2 Bb7 11. Rfd1 Rc8 12. Rac1 Qc7 13. Ne5 Qb8 14. f4 Rfd8 15. Ndf3 Ne4 16. Nxd7 Rxd7 17. Ne5 Rdd8 18. Bxe4 dxe4 19. dxc5 Bxc5 20. b4 Bf8 21. Qh5 Qc7 22. Ng4 Rxd1+ 23. Rxd1 f5 24. Ne5 Bc6 25. a3 Be8 26. Qe2 Rd8 27. Rxd8 Qxd8 28. Bd4 Qc7 29. Qb2 Qc8 30. Kf2 Qc7 31. Qc3 Qd8 32. c5 bxc5 33. bxc5 Qc7 34. Qb3 Bf7 35. c6 Bd6 36. Qb7 a5 37. Bb6 Qxb7 38. cxb7 Be8 39. Ba7 a4 40. b8Q Bxb8 41. Bxb8 Kf8 42. Bd6+ Kg8 43. Ke1 Bb5 44. Kd2 g6 45. g3 Kg7 46. Kc3 h6 47. Kb4 Be8 48. Nc4 g5 49. Nb6 1-0

[Event "Katowice POL-HUN 10th"]
[Site "Katowice"]
[Date "2023.09.10"]
[Round "9"]
[White "Czechowski, Jakub"]
[Black "Piekielny, Pawel"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "1993"]
[BlackElo "2250"]
[PlyCount "116"]
[EventDate "2023.09.09"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Bxc3+ 6. bxc3 c5 7. e3 Nc6 8. cxd5 Nxd5 9. Bd2 Nf6 10. Bb5 0-0 11. Ne2 Bd7 12. 0-0 Nxd4 13. Nxd4 cxd4 14. Bxd7 dxe3 15. Bxe3 Qxd7 16. Qxd7 Nxd7 17. Rfd1 Nf6 18. Bd4 Rfc8 19. Rab1 b6 20. a4 Nd5 21. Rb3 h6 22. a5 bxa5 23. Ra1 Rc6 24. Rxa5 a6 25. Kf2 Rac8 26. Rba3 f6 27. Rxa6 e5 28. Rxc6 Rxc6 29. Be3 Nxc3 30. Ra8+ Kh7 31. Bd2 Nb5 32. Rb8 Nd6 33. Rb2 Ra6 34. Rc2 Nf5 35. Be3 g5 36. g4 Ng7 37. Rc7 Kg6 38. Ra7 Rc6 39. Ra3 h5 40. gxh5+ Kxh5 41. Kg2 Nf5 42. Bf2 Rc2 43. Kg1 Kg6 44. Ra4 Rd2 45. Ra3 Kh5 46. h3 Nd4 47. Kg2 Ne6 48. Kg3 Nf4 49. Ra8 Kg6 50. Ra3 Rc2 51. Ra6 Kf5 52. Rb6 Nxh3 53. Kxh3 Rxf2 54. Kg3 Rd2 55. Rb4 Rd4 56. Rb6 g4 57. fxg4+ Rxg4+ 58. Kf3 Ra4 0-1

[Event "Katowice POL-HUN 10th"]
[Site "Katowice"]
[Date "2023.09.10"]
[Round "8"]
[White "Zochowski, Kacper"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2256"]
[BlackElo "1993"]
[PlyCount "68"]
[EventDate "2023.09.09"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 c6 3. Bg2 d5 4. Nf3 g6 5. 0-0 Bg7 6. d3 0-0 7. Qb3 Qb6 8. Qc2 dxc4 9. Qxc4 Be6 10. Qh4 Bg4 11. Nbd2 Nbd7 12. Nc4 Qc5 13. h3 Bxf3 14. Bxf3 Ne5 15. Nxe5 Qxe5 16. Rb1 Qe6 17. a3 Nd7 18. Bh6 Ne5 19. Bg2 Bf6 20. Qe4 Rfd8 21. Be3 Qd6 22. b4 Nd7 23. b5 Qxa3 24. bxc6 bxc6 25. Qxc6 Rac8 26. Qb7 Nc5 27. Qb4 Qxb4 28. Rxb4 Ne6 29. Bxa7 Nd4 30. Bxd4 Rxd4 31. Rxd4 Bxd4 32. e3 Bf6 33. d4 e6 34. Be4 Be7 1-0

[Event "Katowice POL-HUN 10th"]
[Site "Katowice"]
[Date "2023.09.09"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Barski, Radoslaw"]
[Result "0-1"]
[ECO "D63"]
[WhiteElo "1993"]
[BlackElo "2440"]
[PlyCount "38"]
[EventDate "2023.09.09"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[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. Bg5 Be7 5. e3 0-0 6. Rc1 h6 7. Bh4 Nbd7 8. Nf3 a6 9. cxd5 exd5 10. Bd3 c6 11. 0-0 Ne8 12. Bg3 Nd6 13. Ne5 Nxe5 14. dxe5 Nf5 15. Bf4 Bg5 16. Qf3 Nh4 17. Qg3 Bxf4 18. Qxf4 Qe7 19. Qd4 Qg5 0-1

[Event "Katowice POL-HUN 10th"]
[Site "Katowice"]
[Date "2023.09.09"]
[Round "2"]
[White "Teclaf, Pawel"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2586"]
[BlackElo "1993"]
[PlyCount "63"]
[EventDate "2023.09.09"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2024"]
[Source "ChessBase"]
[SourceDate "2023.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2023.10.10"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 d5 6. c4 c6 7. 0-0 b6 8. Nc3 Bb7 9. Rc1 e6 10. cxd5 cxd5 11. Ba3 Re8 12. Nb5 Nc6 13. Nd6 Qd7 14. Nxe8 Nxe8 15. d3 Nd6 16. Qd2 Nb5 17. Bb2 d4 18. Rfe1 Rd8 19. a4 Nc3 20. Nxd4 Nxd4 21. Bxc3 Nxb3 22. Qb2 Bxc3 23. Rxc3 Nc5 24. Bxb7 Nxa4 25. Bc6 Nxb2 26. Bxd7 Rxd7 27. Ra1 b5 28. Rb3 Na4 29. Rxb5 Nc3 30. Rb8+ Kg7 31. Kf1 Kf6 32. Rb3 1-0

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.21"]
[Round "9"]
[White "Bugajski, Robert"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "D79"]
[WhiteElo "2075"]
[BlackElo "2003"]
[PlyCount "96"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. g3 c6 6. Bg2 d5 7. cxd5 cxd5 8. 0-0 Nc6 9. Ne5 e6 10. Bf4 Nxe5 11. Bxe5 Bd7 12. e3 Qb6 13. Qb3 Rfc8 14. Rfc1 Ne8 15. Bxg7 Kxg7 16. Qxb6 axb6 17. a4 Bxa4 18. e4 dxe4 19. Bxe4 Nd6 20. Bg2 Bc6 21. d5 exd5 22. Rxa8 Rxa8 23. Nxd5 Ra2 24. Nc3 Rxb2 25. Bxc6 bxc6 26. Na4 Rb4 27. Rxc6 Nc4 28. Nc3 Na3 29. Nd5 Rb1+ 30. Kg2 b5 31. Ra6 Nc2 32. Nc3 Rb3 33. Ne4 b4 34. Ra7 Ra3 35. Rc7 b3 36. Ng5 b2 37. Rxf7+ Kg8 38. Rb7 Ne1+ 39. Kh3 Nd3 40. Nxh7 Ra1 41. Nf6+ Kf8 42. Rd7 Ra6 43. Nh7+ Ke8 44. Rxd3 b1Q 45. Re3+ Kd8 46. Rf3 Ra5 47. Kg2 Qb7 48. h4 Qxh7 0-1

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.20"]
[Round "8"]
[White "Czechowski, Jakub"]
[Black "Antoniewicz, Jakub"]
[Result "1-0"]
[ECO "A83"]
[WhiteElo "2003"]
[BlackElo "1931"]
[PlyCount "63"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 f5 2. e4 fxe4 3. Nc3 Nf6 4. Bg5 g6 5. Bc4 c6 6. d5 Bg7 7. Qd2 e6 8. d6 b5 9. Bb3 b4 10. Na4 a5 11. Ne2 Ba6 12. Nf4 e5 13. Ne2 Bb5 14. Nc5 Na6 15. Nxa6 Rxa6 16. a4 Bxe2 17. Qxe2 Qb6 18. Bxf6 Bxf6 19. 0-0-0 Kd8 20. Qxe4 Kc8 21. f3 Kb7 22. h4 Raa8 23. h5 g5 24. Qf5 Qd8 25. Rhe1 Kc8 26. Re4 Bg7 27. Rc4 Ra6 28. Qd3 Qf6 29. Rxb4 axb4 30. Qxa6+ Kb8 31. Qb6+ Ka8 32. Rd5 1-0

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.19"]
[Round "7"]
[White "Hetzer, Volkhard"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "1921"]
[BlackElo "2003"]
[PlyCount "35"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. d4 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d5 6. c4 c6 7. cxd5 cxd5 8. Ne5 e6 9. Nc3 Nfd7 10. f4 Nc6 11. Be3 f6 12. Nxd7 Bxd7 13. Bf2 f5 14. e3 Kh8 15. Rc1 Na5 16. Qe2 Rc8 17. Rfd1 Qe7 18. Be1 1/2-1/2

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.18"]
[Round "6"]
[White "Kasprzak, Lukasz"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "E83"]
[WhiteElo "1938"]
[BlackElo "2003"]
[PlyCount "115"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Nge2 c5 7. Be3 Nc6 8. d5 Na5 9. Ng3 a6 10. Qc2 Bd7 11. Rb1 e6 12. b4 exd5 13. cxd5 cxb4 14. Rxb4 b5 15. Bd3 Rc8 16. Nge2 Nb7 17. Rb1 Re8 18. Qd2 Nc5 19. 0-0 Qa5 20. Rfc1 Rc7 21. Bf4 Qb6 22. Be3 Rec8 23. e5 dxe5 24. Na4 Qd6 25. Nxc5 Rxc5 26. Rxc5 Rxc5 27. Qb4 Rxd5 28. Qxd6 Rxd6 29. Bc2 Be6 30. a4 Bc4 31. axb5 axb5 32. Nc3 Nd5 33. Nxb5 Bxb5 34. Bc5 Nc3 35. Bxd6 Nxb1 36. Bxb1 Bc4 37. g4 f6 38. f4 Kf7 39. Kf2 Ke6 40. fxe5 fxe5 41. Ba3 Bd5 42. h4 Bf6 43. h5 Bh4+ 44. Ke3 Bg5+ 45. Ke2 e4 46. Bb2 Bc4+ 47. Kd1 e3 48. Bd4 e2+ 49. Ke1 Be7 50. Be3 Kf7 51. Be4 Kg7 52. Bf3 Bb4+ 53. Bd2 Bxd2+ 54. Kxd2 Kf6 55. hxg6 hxg6 56. Bxe2 Be6 57. Ke3 Ke5 58. Bf3 1/2-1/2

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.17"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Iwanczuk, Krzysztof"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2003"]
[BlackElo "1947"]
[PlyCount "69"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 c5 4. c3 Nc6 5. Bg2 e6 6. 0-0 Be7 7. b3 0-0 8. e3 b6 9. Qe2 a5 10. Rd1 a4 11. Bb2 Qc7 12. c4 Ba6 13. Nbd2 Rac8 14. Ne5 Na5 15. Rac1 axb3 16. axb3 Rfd8 17. Qf3 dxc4 18. Nexc4 Bb7 19. Qe2 Bxg2 20. Kxg2 Nc6 21. dxc5 bxc5 22. Qf3 Rb8 23. Bxf6 Bxf6 24. Ne4 Be7 25. Rxd8+ Rxd8 26. Rd1 Rd5 27. Nc3 Rxd1 28. Qxd1 Ne5 29. Nxe5 Qxe5 30. Qd3 f5 31. f4 Qc7 32. e4 Qb7 33. Qc4 Kf7 34. Kg1 g6 35. e5 1/2-1/2

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.16"]
[Round "4"]
[White "Skrzyczek, Tomasz"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "E73"]
[WhiteElo "1909"]
[BlackElo "2003"]
[PlyCount "122"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Be3 e5 7. d5 c6 8. g4 cxd5 9. cxd5 a5 10. g5 Ne8 11. h4 Nd7 12. f3 Nc5 13. Nh3 a4 14. Nf2 Qa5 15. Qd2 Bd7 16. Nd3 Nxd3+ 17. Bxd3 Nc7 18. Ne2 Qxd2+ 19. Kxd2 Rfc8 20. Rac1 Bf8 21. Rc2 Na6 22. Rxc8 Rxc8 23. Bxa6 bxa6 24. Rc1 Rb8 25. Rc2 Be7 26. Kc1 Bd8 27. Nc3 f5 28. Bf2 Ba5 29. Be3 Kf7 30. Bd2 Ke7 31. Nd1 Bb6 32. Be3 Bxe3+ 33. Nxe3 fxe4 34. fxe4 Rf8 35. Rc7 Rf4 36. Nc4 Kd8 37. Ra7 Rxe4 38. Nxd6 Rd4 39. Nf7+ Ke8 40. Nxe5 Rxd5 41. Nxd7 Rxd7 42. Rxa6 Rd4 43. h5 gxh5 44. Rh6 Kf7 45. Rxh5 Kg6 46. Rh6+ Kxg5 47. Rxh7 Kf6 48. Kc2 Ke6 49. Kc3 Rg4 50. Rc7 Kd5 51. b3 Rg2 52. bxa4 Rxa2 53. Kb4 Kd6 54. Rc8 Kd7 55. Rc4 Rb2+ 56. Ka3 Rb7 57. a5 Rc7 58. Rb4 Kc8 59. Ka4 Rb7 60. Rh4 Kb8 61. Rh6 Ka7 1/2-1/2

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.15"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Skurniak, Szymon"]
[Result "0-1"]
[ECO "A69"]
[WhiteElo "2003"]
[BlackElo "2051"]
[PlyCount "70"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. Nf3 d6 6. Nd2 e6 7. e4 0-0 8. Be2 exd5 9. cxd5 Nbd7 10. 0-0 Re8 11. f4 c4 12. Qc2 b5 13. a4 b4 14. Nd1 Nc5 15. Bxc4 Ncxe4 16. Nxe4 Nxe4 17. Be3 Bf5 18. Qb3 a5 19. Nf2 Nc5 20. Bxc5 dxc5 21. Nd3 Bd4+ 22. Kh1 Ra7 23. Rae1 Rae7 24. d6 Rxe1 25. Bxf7+ Kg7 26. Rxe1 Rxe1+ 27. Nxe1 Qh4 28. Nf3 Qf2 29. h3 Be3 30. Qd1 Bc2 31. Qa1 Kxf7 32. Ne5+ Ke6 33. d7 Ke7 34. Ng4 Qe2 35. b3 Bd4 0-1

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.14"]
[Round "2"]
[White "Cyborowski, Lukasz"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2483"]
[BlackElo "2003"]
[PlyCount "89"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. g3 Nf6 2. Bg2 g6 3. e4 e5 4. Ne2 Bg7 5. Nbc3 0-0 6. d4 exd4 7. Nxd4 Nc6 8. Nde2 Re8 9. 0-0 d6 10. h3 Ne5 11. f4 Ned7 12. g4 h6 13. Ng3 Nc5 14. Be3 c6 15. e5 Nh7 16. Bxc5 dxc5 17. Qxd8 Rxd8 18. Nce4 b6 19. Nd6 Bd7 20. Rad1 Nf8 21. Nge4 Rab8 22. Rd2 Ne6 23. f5 Bxe5 24. fxe6 Bxe6 25. b3 b5 26. c4 b4 27. Rfd1 Bd4+ 28. Rxd4 cxd4 29. Rxd4 Kf8 30. c5 Bd5 31. Nf2 Bxg2 32. Kxg2 a5 33. Nd3 Rb7 34. Ne5 Rc7 35. Rf4 Kg7 36. Kf3 f6 37. Nec4 Ra7 38. Re4 Rb8 39. Nb6 Kf8 40. Re6 Kg7 41. h4 Rd8 42. h5 Rf8 43. Kf4 Rd8 44. Nbc4 Rf8 45. hxg6 1-0

[Event "Polanica Zdroj op-A 58th"]
[Site "Polanica Zdroj"]
[Date "2022.08.13"]
[Round "1"]
[White "Czechowski, Jakub"]
[Black "Kowalczyk, Rafal"]
[Result "1-0"]
[ECO "E43"]
[WhiteElo "2003"]
[BlackElo "2239"]
[PlyCount "59"]
[EventDate "2022.08.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 210 Extra"]
[Source "ChessBase"]
[SourceDate "2022.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 Bxc3+ 5. bxc3 b6 6. Bd3 Bb7 7. f3 d6 8. Ne2 Nc6 9. e4 h6 10. 0-0 Na5 11. d5 Nd7 12. Nd4 Qf6 13. f4 0-0-0 14. f5 exd5 15. cxd5 c5 16. dxc6 Nxc6 17. Be3 Nc5 18. Nxc6 Bxc6 19. Bd4 Qg5 20. Qf3 Rhe8 21. Rfe1 h5 22. Rad1 f6 23. h3 Qh6 24. Bxc5 bxc5 25. Bc4 Kc7 26. Be6 Rb8 27. Rxd6 h4 28. Red1 Rb2 29. Rxc6+ Kxc6 30. Bd7+ 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.27"]
[Round "9"]
[White "Czechowski, Jakub"]
[Black "Ullrich, Karol"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "2036"]
[BlackElo "1748"]
[PlyCount "65"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 b5 7. Bd3 a6 8. 0-0 c5 9. b3 Bb7 10. Bb2 Nbd7 11. Nbd2 Be7 12. Rc1 0-0 13. Qe2 Qb6 14. e4 Rac8 15. Bb1 cxd4 16. Bxd4 Bc5 17. Bb2 Rfd8 18. e5 Nd5 19. Bxh7+ Kxh7 20. Ng5+ Kg6 21. Qg4 f5 22. Qg3 Bxf2+ 23. Rxf2 f4 24. Qd3+ Kxg5 25. Rxc8 Rxc8 26. Qh7 Nc3 27. h4+ Kg4 28. Qxg7+ Kxh4 29. Qh6+ Kg4 30. Qg6+ Kh4 31. Nf3+ Bxf3 32. gxf3 Ne2+ 33. Kg2 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.26"]
[Round "8"]
[White "Jedrusik, Adam"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "D71"]
[WhiteElo "1937"]
[BlackElo "2036"]
[PlyCount "113"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. Qa4 Nfd7 6. cxd5 Nb6 7. Qd1 cxd5 8. Nc3 Nc6 9. e3 Bg7 10. Nge2 0-0 11. 0-0 e6 12. b3 Re8 13. Ba3 a6 14. Rc1 Bf8 15. Bxf8 Rxf8 16. Nf4 Qd6 17. Nd3 Nd7 18. Qc2 Ndb8 19. Na4 Bd7 20. Qc5 Qxc5 21. Ndxc5 Rd8 22. Nxb7 Rf8 23. Nb6 Ra7 24. Nc5 Be8 25. Rc3 a5 26. a3 Na6 27. Nc8 Ra8 28. Nxa6 Rxa6 29. Rfc1 Na7 30. Bf1 Bb5 31. Nxa7 Bxf1 32. Kxf1 Rxa7 33. Rc8 Rb7 34. Rxf8+ Kxf8 35. Rc3 Ke7 36. Ke2 Kd6 37. Kd3 e5 38. dxe5+ Kxe5 39. f3 g5 40. b4 f5 41. f4+ gxf4 42. exf4+ Kd6 43. Rb3 axb4 44. axb4 h5 45. Kd4 Ra7 46. b5 Ra4+ 47. Ke3 Kc7 48. b6+ Kb7 49. Rb5 Ra3+ 50. Kd4 h4 51. gxh4 Rf3 52. Ke5 d4 53. Rd5 d3 54. Rd6 Rh3 55. Kxf5 Rxh4 56. Rxd3 Kxb6 57. Rd2 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.25"]
[Round "7"]
[White "Stachecki, Mikolaj"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1837"]
[BlackElo "2036"]
[PlyCount "69"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 0-0 6. Re1 d6 7. a4 Na5 8. Ba2 c5 9. c3 Nc6 10. Na3 h6 11. Bd2 Re8 12. h3 Bf8 13. Nc4 Be6 14. b4 cxb4 15. cxb4 a6 16. a5 Nd7 17. Ne3 b6 18. Bd5 Bxd5 19. Nxd5 bxa5 20. bxa5 Nc5 21. Qc2 Rb8 22. Reb1 Rxb1+ 23. Qxb1 Qb8 24. Nb6 Be7 25. Bc3 Bd8 26. Nd2 Re7 27. Ndc4 Rb7 28. Qc2 Nd7 29. Qa4 Bxb6 30. axb6 Nd8 31. Na5 Rxb6 32. Qxd7 Rb1+ 33. Rxb1 Qxb1+ 34. Kh2 Ne6 35. Qxd6 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.24"]
[Round "6"]
[White "Czechowski, Jakub"]
[Black "Ochedzan, Tymon"]
[Result "0-1"]
[ECO "E24"]
[WhiteElo "2036"]
[BlackElo "2308"]
[PlyCount "62"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. a3 Bxc3+ 6. bxc3 0-0 7. e4 d6 8. d5 exd5 9. cxd5 Re8 10. Bb5 Nbd7 11. Ne2 Qa5 12. Bxd7 Bxd7 13. 0-0 Bb5 14. Re1 Bxe2 15. Rxe2 Qxc3 16. Bb2 Qa5 17. Bxf6 gxf6 18. Qb3 b5 19. Qb2 Kg7 20. Re3 Qa4 21. Rd3 Qc4 22. Rad1 Qa4 23. Re1 Rac8 24. Qe2 c4 25. Re3 c3 26. Qf2 Kh8 27. Rd3 Qc4 28. Qc2 a5 29. Red1 b4 30. axb4 axb4 31. Qc1 c2 0-1

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.23"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Kitewski, Bartosz"]
[Result "1/2-1/2"]
[ECO "A04"]
[WhiteElo "2036"]
[BlackElo "1870"]
[PlyCount "88"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. g3 Nc6 4. Bg2 g6 5. 0-0 Bg7 6. d3 e5 7. c3 Nge7 8. Be3 0-0 9. d4 cxd4 10. cxd4 d5 11. Nc3 Bg4 12. Nxd5 Nxd5 13. exd5 Qxd5 14. Nxe5 Qxe5 15. dxe5 Bxd1 16. Raxd1 Bxe5 17. Rd7 Rab8 18. b3 a5 19. a4 Rfd8 20. Rfd1 Nd4 21. R7xd4 Bxd4 22. Rxd4 Rxd4 23. Bxd4 Rd8 24. Bb6 Rd3 25. Bxa5 Rxb3 26. Be1 b5 27. a5 Rb1 28. Kf1 b4 29. a6 Ra1 30. a7 Rxa7 31. Bxb4 Kg7 32. Ke2 g5 33. Bc3+ f6 34. g4 Ra2+ 35. Bd2 Rb2 36. Be4 Ra2 37. Bf5 Rb2 38. Ke1 Ra2 39. Be3 Ra1+ 40. Ke2 Rh1 41. Be4 Rxh2 42. Bf3 Rh3 43. Bg2 Rh4 44. Kf3 h5 1/2-1/2

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.22"]
[Round "4"]
[White "Kacprzak, Karol1111"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C88"]
[WhiteElo "2275"]
[BlackElo "2036"]
[PlyCount "129"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. a4 Rb8 9. axb5 axb5 10. h3 h6 11. c3 d6 12. d4 exd4 13. cxd4 d5 14. e5 Ne4 15. Nc3 Nxc3 16. bxc3 Bf5 17. Ra6 Qd7 18. g4 Bh7 19. Qe2 Nd8 20. Be3 Ne6 21. Qd2 b4 22. Rea1 bxc3 23. Qxc3 Bb4 24. Qc1 Be4 25. Nh4 Be7 26. Ba4 Qc8 27. Nf5 Bxf5 28. gxf5 Qxa6 29. Bd7 Qb6 30. fxe6 fxe6 31. Qd1 Bg5 32. Bxg5 hxg5 33. Rc1 Rf7 34. Ba4 Rbf8 35. Rb1 Qa6 36. Rb2 Qc4 37. Rd2 Ra8 38. Bc2 Qc3 39. Kg2 Raf8 40. Bg6 Qf3+ 41. Qxf3 Rxf3 42. Rc2 c5 43. Bh5 R3f4 44. Bg4 Rxg4+ 45. hxg4 cxd4 46. Rd2 Rf4 47. f3 Kf7 48. Kf2 Ke7 49. Ke2 Kd7 50. Rd1 d3+ 51. Rxd3 Kc6 52. Ra3 Kb6 53. Rb3+ Kc5 54. Ke3 Rb4 55. Rc3+ Rc4 56. Ra3 Rc1 57. Kd2 Rb1 58. Kd3 Re1 59. Rc3+ Kb4 60. Rc7 g6 61. Rg7 Rxe5 62. Rxg6 Kc5 63. Rg8 Kd6 64. Kd4 Re1 65. Rxg5 1/2-1/2

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.21"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Malik, Maciej"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2036"]
[BlackElo "1912"]
[PlyCount "85"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 g6 2. c4 Nf6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Be3 e5 7. d5 c6 8. g4 cxd5 9. cxd5 Bd7 10. Nge2 Qa5 11. Ng3 Rc8 12. Qd2 Na6 13. a3 Qd8 14. b4 Rc7 15. Rc1 Be8 16. Bh6 Nd7 17. Be3 Nb6 18. Rg1 Rac8 19. Bxb6 axb6 20. g5 Bd7 21. h4 Qe8 22. Bd3 Qf8 23. f3 f5 24. Ke2 f4 25. Nh1 Qe8 26. Nf2 Kf7 27. Na2 Bb5 28. Ng4 Bc4 29. Bxc4 Rxc4 30. Rxc4 Rxc4 31. Rc1 Qc8 32. Rc3 Rxe4+ 33. fxe4 Qxg4+ 34. Kf1 Qxh4 35. Qg2 Qh5 36. Ke1 h6 37. gxh6 Bf6 38. Qh3 Qh4+ 39. Ke2 f3+ 40. Qxf3 Qxh6 41. Qh3 Qf4 42. Qh7+ Bg7 43. Rf3 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.20"]
[Round "2"]
[White "Fiedorek, Michal"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C88"]
[WhiteElo "2317"]
[BlackElo "2036"]
[PlyCount "49"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. a4 Rb8 9. axb5 axb5 10. c3 d6 11. d4 exd4 12. cxd4 d5 13. e5 Ne4 14. Nc3 Nxc3 15. bxc3 Bf5 16. Ra6 Qd7 17. Bg5 Bxg5 18. Nxg5 h6 19. Nf3 Rfd8 20. Qd2 Be4 21. Qf4 Ra8 22. Rea1 Rxa6 23. Rxa6 Ne7 24. e6 Ng6 25. Qxe4 1-0

[Event "POL-ch U18"]
[Site "Sypniewo"]
[Date "2022.03.19"]
[Round "1"]
[White "Czechowski, Jakub"]
[Black "Suder, Jakub"]
[Result "1/2-1/2"]
[ECO "D21"]
[WhiteElo "2036"]
[BlackElo "2321"]
[PlyCount "97"]
[EventDate "2022.03.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 207 Extra"]
[Source "ChessBase"]
[SourceDate "2022.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.05.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. a4 Nc6 5. e3 e5 6. Bxc4 e4 7. Qb3 Na5 8. Bxf7+ Ke7 9. Qa2 exf3 10. Bxg8 Rxg8 11. Qxg8 fxg2 12. Rg1 Be6 13. Qxh7 Nb3 14. Ra3 Nxc1 15. Nc3 Ke8 16. Qe4 Kf7 17. d5 Bd7 18. Rxg2 Qf6 19. Qc2 Bxa3 20. bxa3 c6 21. Qxc1 cxd5 22. Qd2 Rc8 23. Qxd5+ Be6 24. Qxb7+ Kg8 25. Nd1 Rd8 26. f3 Rd7 27. Qb8+ Kh7 28. Qb1+ g6 29. Qe4 Bf5 30. Qb4 Bh3 31. Rd2 Rxd2 32. Kxd2 Qxf3 33. Qe7+ Kg8 34. Qd8+ Kf7 35. Qc7+ Kg8 36. Qb8+ Kh7 37. Qa7+ Kh6 38. Qxa6 Bg4 39. Nb2 Qf2+ 40. Kc3 Qxe3+ 41. Nd3 Qe7 42. Kb3 Bd1+ 43. Kb2 Qc7 44. Nb4 Qxh2+ 45. Kc3 Qe5+ 46. Kd2 Bb3 47. Qd3 Qb2+ 48. Nc2 Bxc2 49. Qxc2 1/2-1/2

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2022.01.04"]
[Round "9"]
[White "Panek, Bartosz"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2073"]
[BlackElo "2016"]
[PlyCount "65"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. 0-0 d6 6. h3 a6 7. Nc3 Na5 8. a3 Nxc4 9. dxc4 h6 10. b4 Ba7 11. Qd3 0-0 12. Rd1 Be6 13. Be3 Bxe3 14. Qxe3 Bxc4 15. Nxe5 Be6 16. Nd3 Qe7 17. Nf4 Rfe8 18. Rd3 Bc4 19. Rd4 b5 20. Re1 a5 21. Ncd5 Nxd5 22. Nxd5 Bxd5 23. Rxd5 axb4 24. axb4 c6 25. Rd4 Ra7 26. Qd3 Rd8 27. Rd1 Rad7 28. Qc3 Rc7 29. Qg3 Rcd7 30. Qc3 Rc7 31. f4 c5 32. bxc5 Rxc5 33. Qd3 1/2-1/2

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2022.01.03"]
[Round "8"]
[White "Czechowski, Jakub"]
[Black "Golenia, Wojciech"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2016"]
[BlackElo "2059"]
[PlyCount "120"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 c5 5. e3 cxd4 6. exd4 d5 7. a3 Bxc3+ 8. bxc3 dxc4 9. Bxc4 Qc7 10. Qd3 0-0 11. Ne2 Nd5 12. 0-0 b6 13. Bd2 Bb7 14. Ba2 b5 15. a4 a6 16. axb5 axb5 17. Bb1 g6 18. Rxa8 Bxa8 19. Qxb5 Bb7 20. Bd3 Ba6 21. Qb1 Bc4 22. Rc1 Nd7 23. Nf4 Rb8 24. Nxd5 exd5 25. Qc2 Bb3 26. Qb2 Bc4 27. Qc2 Ra8 28. Bxc4 Qxc4 29. Rb1 h5 30. Kf2 Rc8 31. Rb7 Nf8 32. Qb1 Re8 33. Qf1 Qa2 34. Qd3 Ne6 35. g3 Ng7 36. Rb1 Nf5 37. Kg1 Nd6 38. Re1 Ra8 39. Bf4 Nc4 40. Qb1 Qa6 41. Re7 Qf6 42. Qe1 Qc6 43. Rc7 Qb6 44. Re7 Qb5 45. g4 hxg4 46. fxg4 Kg7 47. Re2 Ra3 48. Qh4 Qd7 49. Bg5 Ra6 50. h3 Re6 51. Rf2 Qd6 52. Bf4 Re1+ 53. Kh2 Qb6 54. Ra2 Re8 55. Bh6+ Kg8 56. Bg5 Qb8+ 57. Kg2 Qb1 58. Qf2 Qd3 59. Ra7 Re2 60. Ra8+ Kh7 0-1

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2022.01.02"]
[Round "6"]
[White "Czechowski, Jakub"]
[Black "Vignesh, R3333"]
[Result "1-0"]
[ECO "A58"]
[WhiteElo "2016"]
[BlackElo "1947"]
[PlyCount "195"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 e6 6. Nc3 exd5 7. Nxd5 Be7 8. Nxe7 Qxe7 9. Nf3 Bxa6 10. Bf4 d5 11. Qa4+ Nbd7 12. e3 c4 13. Be2 0-0 14. 0-0 Ne4 15. h3 c3 16. Qc2 Rfc8 17. Bxa6 Rxa6 18. bxc3 g5 19. Bh2 h5 20. Qd3 Ra5 21. Nd4 Rxc3 22. Qe2 Ndf6 23. Qb2 Rac5 24. Rac1 Rxc1 25. Rxc1 Kh7 26. f3 Rxc1+ 27. Qxc1 Nc5 28. Nc6 Qb7 29. Qxc5 Qb1+ 30. Kf2 Qxa2+ 31. Kf1 Qb1+ 32. Ke2 Qb2+ 33. Kd1 Qxg2 34. Qc2+ Qxc2+ 35. Kxc2 g4 36. hxg4 hxg4 37. fxg4 Nxg4 38. Bf4 Kg6 39. Ne7+ Kf6 40. Nxd5+ Kf5 41. Kd3 Nf2+ 42. Ke2 Ne4 43. Ne7+ Ke6 44. Nc6 Kd5 45. Nd4 Nc3+ 46. Kd3 Ne4 47. Nf3 f6 48. Nd2 Nc5+ 49. Ke2 Ke6 50. Kf3 f5 51. Nf1 Kf6 52. Ng3 Ne6 53. Ke2 Nc5 54. Kd2 Ke6 55. Kc3 Nb7 56. Kb4 Nd8 57. Kc5 Nb7+ 58. Kb5 Nd8 59. Kc4 Nc6 60. Ne2 Ne7 61. Bg5 Nc8 62. Kd4 Na7 63. Nf4+ Kd6 64. Bh6 Nc6+ 65. Kd3 Ne5+ 66. Kc3 Ng4 67. Bf8+ Ke5 68. Kd3 Nf2+ 69. Ke2 Ne4 70. Bg7+ Kd6 71. Bd4 Ng3+ 72. Kf3 Ne4 73. Kg2 Kc6 74. Nh5 Nd6 75. Kf3 Kd5 76. Kf4 Nb5 77. Be5 Ke6 78. Ng7+ Kf7 79. Nxf5 Na3 80. e4 Ke6 81. Bc3 Nc4 82. Nd4+ Kf7 83. Bb4 Nb2 84. Kf5 Nc4 85. Nc6 Ne3+ 86. Ke5 Nc4+ 87. Kd4 Nb6 88. Bc5 Na8 89. Bd6 Nb6 90. Bc7 Na4 91. Ne5+ Ke7 92. Nd3 Kd7 93. Ba5 Ke6 94. Kc4 Kd6 95. Bb4+ Ke6 96. Bc5 Kf6 97. Bd4+ Kg5 98. Kb4 1-0

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2022.01.02"]
[Round "7"]
[White "Meers, Hubert"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C27"]
[WhiteElo "1930"]
[BlackElo "2016"]
[PlyCount "49"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Bb4 4. Nge2 c6 5. 0-0 d5 6. exd5 cxd5 7. Bb5+ Bd7 8. d4 e4 9. Bg5 Bxb5 10. Nxb5 Nbd7 11. c4 a6 12. Bxf6 Nxf6 13. Qa4 0-0 14. Qxb4 axb5 15. Qxb5 Ra5 16. Qxb7 dxc4 17. Rfc1 Rh5 18. Rxc4 Rxh2 19. Qc7 Rh6 20. Qxd8 Rxd8 21. Nc3 g5 22. a4 Nd5 23. Nxe4 Nf4 24. Ng3 Rb6 25. b4 1-0

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2021.12.31"]
[Round "5"]
[White "Zarnowski, Krzysztof"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "D87"]
[WhiteElo "2078"]
[BlackElo "2016"]
[PlyCount "106"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 c5 9. 0-0 Nc6 10. Be3 Bg4 11. f3 Bd7 12. Rb1 Qc7 13. Bb5 Rad8 14. Bxc6 Bxc6 15. d5 Bd7 16. c4 a6 17. Qb3 b5 18. cxb5 axb5 19. Qc2 c4 20. a4 e6 21. dxe6 Bxe6 22. axb5 Rd3 23. Qc1 Rfd8 24. b6 Qc6 25. b7 Rb8 26. Rb6 Qd7 27. Kh1 Rxb7 28. Rxb7 Qxb7 29. Nf4 Bb2 30. Qe1 Ra3 31. Qd2 Bf6 32. Nxe6 fxe6 33. Bc5 Rd3 34. Qf4 Bg7 35. h4 c3 36. Kh2 c2 37. Rc1 Bh6 38. Qxh6 Qc7+ 39. Kh3 Qxc5 40. Qg5 Qxg5 41. hxg5 Rd2 42. f4 e5 43. g3 Kf7 44. Kg4 Rf2 45. Ra1 Ke6 46. Ra6+ Kd7 47. Ra7+ Kd6 48. Ra1 Kc5 49. fxe5 Kd4 50. e6 Rf8 51. Ra4+ Kd3 52. Ra3+ Kd2 53. e7 Re8 0-1

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2021.12.30"]
[Round "4"]
[White "Czechowski, Jakub"]
[Black "Kumor, Lukasz"]
[Result "1/2-1/2"]
[ECO "D26"]
[WhiteElo "2016"]
[BlackElo "2075"]
[PlyCount "148"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Bd3 dxc4 6. Bxc4 c5 7. 0-0 Nc6 8. Nc3 cxd4 9. exd4 Be7 10. Qe2 0-0 11. Rd1 Na5 12. Bd3 b6 13. Bf4 Bb7 14. Rac1 Rc8 15. Bb1 Nd5 16. Bg3 Nxc3 17. bxc3 Qd5 18. Bd3 Nc4 19. Ne1 Bg5 20. Rb1 b5 21. f3 f5 22. Nc2 a6 23. a4 Rfe8 24. h4 Bf6 25. axb5 axb5 26. Bxc4 Qxc4 27. Qxc4 Rxc4 28. Rd3 Rec8 29. Rb3 Bd5 30. Ne3 b4 31. Nxd5 exd5 32. cxb4 Rxd4 33. Rxd4 Bxd4+ 34. Kh2 Kf7 35. b5 Bb6 36. Bf4 Ke6 37. Ra3 Kd7 38. Ra6 Bc5 39. b6 Kc6 40. Ra7 Rg8 41. Rf7 Bxb6 42. Rxf5 d4 43. h5 Re8 44. h6 gxh6 45. Bxh6 d3 46. Bd2 Be3 47. Bc3 d2 48. Bxd2 Bxd2 49. Rf7 h6 50. Rf6+ Kd5 51. g3 Ke5 52. Rc6 Be3 53. f4+ Ke4 54. Kg2 h5 55. Rh6 Rg8 56. Re6+ Kd3 57. Kf3 Bd2 58. Rd6+ Kc2 59. Rh6 Be1 60. Rxh5 Rxg3+ 61. Ke4 Bc3 62. Rg5 Rh3 63. f5 Rh4+ 64. Kd5 Rf4 65. Ke6 Kd3 66. Rg3+ Kc4 67. Rxc3+ Kxc3 68. f6 Kd4 69. f7 Kc5 70. Ke7 Re4+ 71. Kf6 Rf4+ 72. Ke7 Kd5 73. f8Q Rxf8 74. Kxf8 Ke5 1/2-1/2

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2021.12.29"]
[Round "3"]
[White "Bukala, Weronika"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "1875"]
[BlackElo "2016"]
[PlyCount "61"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 0-0 6. Be3 e5 7. d5 c6 8. g4 cxd5 9. cxd5 a5 10. Qd2 Na6 11. Nge2 Nc5 12. f3 a4 13. Ng3 Qa5 14. h4 Bd7 15. h5 b5 16. h6 Bh8 17. Nf5 Bxf5 18. gxf5 Rfb8 19. fxg6 fxg6 20. Bxc5 dxc5 21. Bh3 Qb4 22. Rd1 a3 23. b3 Rd8 24. 0-0 Nh5 25. Be6+ Kf8 26. f4 exf4 27. Rxf4+ Ke8 28. Bf7+ Kd7 29. Be6+ Ke8 30. Bf7+ Kd7 31. Be6+ 1/2-1/2

[Event "Krakow op-B 32nd"]
[Site "Krakow"]
[Date "2021.12.28"]
[Round "2"]
[White "Czechowski, Jakub"]
[Black "Pietrzak, Tomasz1111"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "2016"]
[BlackElo "1865"]
[PlyCount "87"]
[EventDate "2021.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 e6 2. c4 Bb4+ 3. Nc3 f5 4. g3 Nf6 5. Bg2 0-0 6. Qc2 d6 7. Nf3 Qe7 8. Bd2 a5 9. a3 Bxc3 10. Bxc3 b6 11. Nd2 Ra7 12. e4 Bb7 13. 0-0 f4 14. b4 Nh5 15. Rab1 axb4 16. axb4 Nd7 17. Qd1 Qg5 18. Nf3 Qg6 19. d5 e5 20. Nh4 Qe8 21. g4 f3 22. Bxf3 Nf4 23. Bd2 Qd8 24. Bxf4 exf4 25. Nf5 Ne5 26. Be2 f3 27. Bxf3 Nxf3+ 28. Qxf3 g6 29. Nh6+ Kg7 30. Qe3 Qh4 31. g5 Qf4 32. Qd4+ Qe5 33. Qxe5+ dxe5 34. Ng4 Rf4 35. f3 Bc8 36. Nxe5 Bh3 37. Ra1 Rb7 38. Rf2 h6 39. gxh6+ Kxh6 40. Ra8 Kg7 41. Nd3 Rf8 42. Rxf8 Ra7 43. Rd2 Kxf8 44. Kf2 1-0

[Event "Dziedzica Memrial 11th"]
[Site "Trzcianka"]
[Date "2021.10.24"]
[Round "2"]
[White "Czechowski, Jakub"]
[Black "Chojnacki, Krzysztof"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "2016"]
[BlackElo "2378"]
[PlyCount "36"]
[EventDate "2021.10.24"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 204 Extra"]
[Source "ChessBase"]
[SourceDate "2021.11.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.11.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 c5 7. d5 e6 8. Qd2 exd5 9. exd5 Re8 10. 0-0-0 Qa5 11. Kb1 a6 12. Bd3 b5 13. cxb5 axb5 14. Bxb5 Bf5+ 15. Kc1 Nxd5 16. Qxd5 Bxc3 17. Bxe8 Bxb2+ 18. Kxb2 Qa3+ 0-1

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.22"]
[Round "9"]
[White "Sergeev, Vladimir"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "2403"]
[BlackElo "1890"]
[PlyCount "86"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. b4 Bg7 4. Bb2 0-0 5. e3 d6 6. Be2 e5 7. 0-0 Nbd7 8. d4 Re8 9. Nc3 e4 10. Nd2 Nf8 11. a4 h5 12. a5 a6 13. Qc2 Bf5 14. d5 N8h7 15. Nb3 Ng4 16. Bxg4 Bxg4 17. Ne2 Ng5 18. Rfb1 h4 19. Bxg7 Kxg7 20. Qb2+ Kh7 21. Nbd4 h3 22. g3 c5 23. dxc6 bxc6 24. c5 dxc5 25. bxc5 Qf6 26. Nf4 Rad8 27. Ra2 Rxd4 28. exd4 Nf3+ 29. Kh1 Nxd4 30. Ra4 Rd8 31. f3 Bxf3+ 32. Kg1 Bg4 33. Rxd4 Qxd4+ 34. Qxd4 Rxd4 35. Kf2 g5 36. Ke3 Rc4 37. Ne2 Bxe2 38. Kxe2 Rxc5 39. Ke3 Rxa5 40. Kxe4 Rc5 41. g4 Rc2 42. Kf5 Rxh2 43. Kxg5 Rf2 0-1

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.21"]
[Round "8"]
[White "Czechowski, Jakub"]
[Black "Kowalczyk, Rafal"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "1890"]
[BlackElo "2272"]
[PlyCount "82"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Nge2 Re8 6. a3 Bf8 7. d5 d6 8. Ng3 Nbd7 9. Be2 a6 10. 0-0 exd5 11. cxd5 c5 12. a4 g6 13. e4 h5 14. Bg5 Qc7 15. f4 Bg7 16. e5 dxe5 17. f5 c4 18. fxg6 fxg6 19. Qc2 e4 20. Ngxe4 Nxe4 21. Nxe4 Qe5 22. Bf3 Kh8 23. Rae1 Rf8 24. Qxc4 Nb6 25. Qc3 Nxd5 26. Qxe5 Bxe5 27. Nf2 Bf6 28. Bxd5 Bxg5 29. Ne4 Rxf1+ 30. Rxf1 Be3+ 31. Kh1 Bf5 32. Nd6 Bc2 33. Bxb7 Rb8 34. Bxa6 Bxa4 35. Bd3 Bc5 36. Nf7+ Kg7 37. Ng5 Bb3 38. Nf3 Bf7 39. Ne5 Be8 40. Nc4 Bf7 41. Ne5 Be8 1/2-1/2

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.20"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Goraj, Barbara"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1890"]
[BlackElo "2105"]
[PlyCount "92"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 g6 6. Na3 cxd4 7. cxd4 Bg7 8. Bc4 Qe4+ 9. Be3 0-0 10. 0-0 Nd5 11. Re1 Nxe3 12. Rxe3 Qg4 13. Rxe7 Nc6 14. Re2 Nxd4 15. Nxd4 Bxd4 16. Qb3 Bc5 17. Nc2 Bf5 18. Ne3 Bxe3 19. Rxe3 Rac8 20. Bd3 Bxd3 21. Rxd3 Rc7 22. Rad1 Qe2 23. R3d2 Qe5 24. g3 Qe7 25. Rd3 Rfc8 26. Re3 Qf6 27. Rf3 Qe7 28. Kg2 Rc4 29. Rd2 Kg7 30. Qb5 R4c7 31. Qd5 a6 32. Qd4+ Kg8 33. Re3 Qg5 34. Rde2 Qd8 35. Qa4 Qd5+ 36. f3 Kg7 37. Re5 Qd6 38. Qe4 Qf6 39. Rd5 Rc4 40. Qe5 Qxe5 41. Rdxe5 Rc2 42. Kf2 Kf6 43. Re7 Rxe2+ 44. Rxe2 h5 45. h4 Rc1 46. a3 Rc4 1/2-1/2

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.19"]
[Round "6"]
[White "Vanduyfhuys, Daria"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "E99"]
[WhiteElo "2101"]
[BlackElo "1890"]
[PlyCount "118"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Nf3 e5 7. 0-0 Nc6 8. d5 Ne7 9. Ne1 Nd7 10. Nd3 f5 11. f3 f4 12. Bd2 g5 13. Kh1 Ng6 14. Rg1 Rf7 15. b4 Kh8 16. c5 Nf6 17. a4 h5 18. g3 Nh7 19. Rc1 fxg3 20. Rxg3 Nf4 21. Nxf4 exf4 22. Rg1 a6 23. Be1 Qf8 24. Bf2 g4 25. Bd4 Ng5 26. Qd2 Bxd4 27. Qxd4+ Qg7 28. Qxg7+ Rxg7 29. Rgf1 gxf3 30. Bxf3 Bh3 31. Bg2 Bxg2+ 32. Kxg2 Nxe4+ 33. Kh1 Re8 34. cxd6 cxd6 35. b5 a5 36. b6 Nxc3 37. Rxc3 Re4 38. Rc8+ Kh7 39. Rf8 Rb4 40. R8xf4 Rxb6 41. h4 Rb4 42. Rxb4 axb4 43. Rf6 b5 44. a5 Ra7 45. Rf4 Rxa5 46. Rxb4 Kg6 47. Re4 Ra6 48. Kg2 Rb6 49. Rb4 Kf5 50. Kf3 Ke5 51. Rb1 b4 52. Ke3 Kxd5 53. Kf4 Kc4 54. Ke3 Kc3 55. Rc1+ Kb2 56. Rc8 b3 57. Kd2 Kb1 58. Kd1 b2 59. Ra8 Rb5 0-1

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.18"]
[Round "5"]
[White "Topola, Rafal"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C68"]
[WhiteElo "1878"]
[BlackElo "1890"]
[PlyCount "37"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Qf6 6. d3 Bg4 7. Nbd2 Ne7 8. h3 h5 9. Re1 Ng6 10. Kf1 Bc5 11. hxg4 hxg4 12. g3 gxf3 13. Qxf3 Qe6 14. Nb3 Bb6 15. Be3 0-0-0 16. Qf5 Rde8 17. Qxe6+ Rxe6 18. Kg2 Rd6 19. Bc5 1/2-1/2

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.17"]
[Round "4"]
[White "Czechowski, Jakub"]
[Black "Dzhuguryan, Tygran"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1890"]
[BlackElo "2214"]
[PlyCount "11"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Bd6 5. h3 Ne7 6. Ne2 1/2-1/2

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.16"]
[Round "3"]
[White "Dwilewicz, Katarzyna"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C90"]
[WhiteElo "2130"]
[BlackElo "1890"]
[PlyCount "79"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. d3 d6 7. c3 0-0 8. Re1 b5 9. Bb3 Na5 10. Bc2 c5 11. Nbd2 Nd7 12. Nf1 Nb6 13. Ng3 Nc6 14. a3 Qc7 15. Qe2 Re8 16. b4 Bf8 17. Be3 h6 18. Rac1 a5 19. bxc5 dxc5 20. Bb3 c4 21. dxc4 bxc4 22. Ba2 Bxa3 23. Rb1 Rb8 24. Nd2 Be6 25. Bxb6 Rxb6 26. Rxb6 Qxb6 27. Nxc4 Qc5 28. Rb1 Bxc4 29. Bxc4 Qa7 30. Nf5 Ne7 31. Bxf7+ Kxf7 32. Qa2+ Kf6 33. Qxa3 Nxf5 34. exf5 Kxf5 35. h3 Qc7 36. Qa4 Rc8 37. Qg4+ Kf6 38. Qf3+ Ke6 39. Rb7 Qxc3 40. Qf7+ 1-0

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.15"]
[Round "2"]
[White "Czechowski, Jakub"]
[Black "Kumor, Lukasz"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1890"]
[BlackElo "2066"]
[PlyCount "139"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 e6 5. Nbd2 Nbd7 6. Bd3 Be7 7. 0-0 c5 8. b3 0-0 9. Bb2 b6 10. Qe2 Bb7 11. Rfd1 Ne4 12. cxd5 exd5 13. dxc5 bxc5 14. Bxe4 dxe4 15. Ne5 Nxe5 16. Bxe5 Qc8 17. Nc4 Qe6 18. Qb2 f6 19. Bd6 Rfd8 20. Bxe7 Qxe7 21. Qc3 Rxd1+ 22. Rxd1 Rd8 23. Rxd8+ Qxd8 24. h3 h6 25. Nb2 Qd5 26. Na4 Qd1+ 27. Kh2 Qd6+ 28. g3 Qd3 29. Qxc5 Qe2 30. Qf5 Qf3 31. Qxf3 exf3 32. g4 Kf7 33. Kg3 Bc6 34. Nc3 Ke6 35. Nb1 Kd5 36. a3 g5 37. Nd2 Ke5 38. Nxf3+ Ke4 39. Nd4 Bd7 40. b4 Kd3 41. b5 Kc4 42. a4 Kb4 43. Nc6+ Kxa4 44. Nxa7 Ka5 45. e4 Kb6 46. Nc6 Kxb5 47. Ne7 Be6 48. Nf5 Kc5 49. Nxh6 Kd4 50. f3 Ke5 51. Nf5 Bd7 52. h4 gxh4+ 53. Nxh4 Be8 54. Kf2 Bc6 55. Ke3 Bd7 56. f4+ Ke6 57. f5+ Ke5 58. Nf3+ Kd6 59. Kf4 Be8 60. e5+ Ke7 61. exf6+ Kxf6 62. g5+ Kf7 63. g6+ Kf6 64. Ne5 Bb5 65. Ng4+ Kg7 66. Kg5 Be8 67. f6+ Kh8 68. g7+ Kh7 69. Nh6 Bf7 70. Nxf7 1-0

[Event "Rubinstein Memorial op-A 57th"]
[Site "Polanica Zdroj"]
[Date "2021.08.14"]
[Round "1"]
[White "Bartel, Michal"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "2246"]
[BlackElo "1890"]
[PlyCount "95"]
[EventDate "2021.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 d5 5. Bb5 Nxe4 6. Qe2 Nxc3 7. Qxe5+ Qe7 8. dxc3 Bd7 9. Qxe7+ Bxe7 10. Bf4 0-0-0 11. 0-0-0 Bg4 12. c4 dxc4 13. Bxc4 Bc5 14. Bg3 Nd4 15. Nxd4 Bxd1 16. Nb3 Bxa3 17. Bxf7 Bxb2+ 18. Kxb2 Bg4 19. f3 Bf5 20. Be5 Rd7 21. Bc4 Re8 22. Bc3 Be6 23. Bb5 c6 24. Bd3 Bxb3 25. Kxb3 g6 26. h4 Rd5 27. h5 Rxh5 28. Rxh5 gxh5 29. Bxh7 h4 30. Bf6 Re2 31. Bf5+ Kc7 32. Bh3 a5 33. Bxh4 b5 34. f4 a4+ 35. Kc3 a3 36. Bf6 b4+ 37. Kxb4 Re3 38. Kc5 a2 39. Bg4 Re1 40. Bf3 a1Q 41. Bxa1 Rxa1 42. Bxc6 Ra5+ 43. Bb5 Ra2 44. Bd3 Ra4 45. c4 Ra8 46. g4 Rf8 47. Bf5 Rd8 48. Be6 1-0

[Event "Warsaw Najdorf Memorial op-A"]
[Site "Warsaw"]
[Date "2021.07.10"]
[Round "1"]
[White "Nowak, Mikolaj"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2310"]
[BlackElo "1961"]
[PlyCount "65"]
[EventDate "2021.07.10"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. d4 Bg7 4. e3 0-0 5. Be2 d6 6. Nc3 Nbd7 7. 0-0 e5 8. Qc2 Re8 9. Rd1 c6 10. b4 e4 11. Nd2 Qe7 12. a4 Nf8 13. a5 h5 14. Ba3 Bf5 15. b5 N8h7 16. a6 bxa6 17. bxc6 Ng5 18. Rdb1 Rec8 19. Qa4 Qd8 20. Rb7 Ng4 21. Nd5 Nh3+ 22. gxh3 Nxf2 23. Ne7+ Kh8 24. Kxf2 Bf6 25. Nxf5 gxf5 26. Rg1 Bxd4 27. Bb2 Qh4+ 28. Rg3 Bxb2 29. Rxb2 Rg8 30. Qa3 Qf6 31. Ke1 Qe5 32. Rxg8+ Rxg8 33. c7 1-0

[Event "Warsaw Maciei Memorial"]
[Site "Warsaw"]
[Date "2021.07.09"]
[Round "3"]
[White "Macieja, Bartlomiej"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2519"]
[BlackElo "1961"]
[PlyCount "65"]
[EventDate "2021.07.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 a6 6. h3 Ba7 7. Bb3 d6 8. Nbd2 Ne7 9. Nf1 Ng6 10. Ng3 h6 11. 0-0 0-0 12. Re1 Be6 13. Bxe6 fxe6 14. d4 Qe7 15. Be3 Kh7 16. Qb3 c6 17. dxe5 dxe5 18. Bxa7 Rxa7 19. Rad1 Raa8 20. Qb6 Rad8 21. a4 Nd7 22. Qe3 Nf4 23. Ne2 Nxe2+ 24. Rxe2 Qc5 25. Red2 Qe7 26. Qa7 Rxf3 27. gxf3 Qg5+ 28. Kf1 Qf4 29. Rxd7 Rxd7 30. Rxd7 Qxf3 31. Qe3 Qh1+ 32. Ke2 Qb1 33. Rd2 1-0

[Event "Warsaw Maciei Memorial"]
[Site "Warsaw"]
[Date "2021.07.09"]
[Round "7"]
[White "Szustakowski, Antoni"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2260"]
[BlackElo "1961"]
[PlyCount "36"]
[EventDate "2021.07.09"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "POL"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 h6 7. Be3 e5 8. d5 a5 9. Qd2 Kh7 10. f3 Nh5 11. g3 f5 12. exf5 gxf5 13. 0-0-0 Na6 14. Bd3 Nc5 15. Bc2 Qf6 16. Nge2 Kh8 17. Rhg1 f4 18. Bxc5 dxc5 1-0

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.21"]
[Round "9"]
[White "Czechowski, Jakub"]
[Black "Mazurek, Bartosz"]
[Result "1/2-1/2"]
[ECO "A44"]
[WhiteElo "1932"]
[BlackElo "1854"]
[PlyCount "71"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. d4 c5 2. d5 e5 3. e4 d6 4. Bb5+ Nd7 5. a4 Be7 6. Nc3 a6 7. Be2 Bg5 8. Nf3 Bxc1 9. Qxc1 Ne7 10. Nd2 0-0 11. Nc4 Nb6 12. Ne3 f5 13. a5 f4 14. axb6 fxe3 15. Qxe3 Qxb6 16. 0-0 Ng6 17. g3 Bh3 18. Rfb1 Qd8 19. Bh5 b5 20. Ne2 Qf6 21. c3 c4 22. f4 Bd7 23. Rf1 a5 24. Rf2 Qe7 25. Bxg6 hxg6 26. fxe5 Rxf2 27. Qxf2 Qxe5 28. Qf4 Qe7 29. Rf1 Re8 30. Nd4 b4 31. cxb4 axb4 32. Nc6 Bxc6 33. dxc6 Qc7 34. Qg4 Qb6+ 35. Rf2 Qxc6 36. Qxg6 1/2-1/2

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.20"]
[Round "8"]
[White "Grochol, Kamil"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C47"]
[WhiteElo "2006"]
[BlackElo "1932"]
[PlyCount "104"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3 d5 5. Bb5 d4 6. Ne2 Bd7 7. d3 Bd6 8. 0-0 a6 9. Bc4 h6 10. Bd2 Ne7 11. Nexd4 Nxe4 12. dxe4 exd4 13. Nxd4 b5 14. Bd3 0-0 15. Bc3 Ng6 16. Nf5 Bxf5 17. exf5 Ne5 18. f4 Nxd3 19. cxd3 Bc5+ 20. Kh1 Bd4 21. Rc1 Bxc3 22. Rxc3 Qf6 23. Qf3 Qxf5 24. Rxc7 Rad8 25. Rc3 Rfe8 26. g3 Re7 27. Rf2 Rde8 28. Kg2 Re3 29. Qc6 R3e6 30. Qb7 R8e7 31. Qa8+ Re8 32. Rc8 Rxc8 33. Qxc8+ Kh7 34. Qd7 Qc5 35. Qb7 Re7 36. Qa8 Qd4 37. Qc6 Qxd3 38. Qc2 Qxc2 39. Rxc2 Re6 40. Kf3 Kg6 41. Rc7 f5 42. Ra7 Kf6 43. h4 h5 44. Ra8 Kf7 45. Rh8 Kg6 46. Rc8 Kf6 47. Rc5 Re4 48. Rc6+ Re6 49. Rc7 Kg6 50. Rc8 Kf7 51. Ra8 Kf6 52. Rh8 Kg6 1/2-1/2

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.19"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Trybus, Daniel"]
[Result "1-0"]
[ECO "E94"]
[WhiteElo "1932"]
[BlackElo "2021"]
[PlyCount "51"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. 0-0 exd4 8. Nxd4 Re8 9. f3 c6 10. Kh1 Nbd7 11. Bf4 Nh5 12. Bxd6 Qf6 13. Nb3 Nf4 14. c5 b5 15. Qd2 Ne5 16. g3 Nxe2 17. Qxe2 Bh3 18. Rf2 Nc4 19. Bf4 Rad8 20. Re1 Rd7 21. e5 Qd8 22. Ne4 Bxe5 23. Bg5 f6 24. Bxf6 Qc7 25. f4 Nxb2 26. Bxe5 1-0

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.18"]
[Round "6"]
[White "Owoc, Jakub"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "A68"]
[WhiteElo "1787"]
[BlackElo "1932"]
[PlyCount "62"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[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 Bg4 10. 0-0 Nbd7 11. h3 Bxf3 12. Bxf3 Re8 13. g4 h6 14. h4 h5 15. g5 Ng4 16. Bxg4 hxg4 17. e5 dxe5 18. f5 gxf5 19. Rxf5 e4 20. Bf4 Ne5 21. Bxe5 Rxe5 22. Qxg4 Rxf5 23. Qxf5 Bxc3 24. bxc3 Qd6 25. Qxe4 Qg3+ 26. Qg2 Qxc3 27. Rd1 Re8 28. Rd2 Re1+ 29. Kh2 Qe5+ 30. Kh3 Qf5+ 31. Kh2 Qf4+ 0-1

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.17"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Derylo, Kamil"]
[Result "0-1"]
[ECO "D90"]
[WhiteElo "1932"]
[BlackElo "2015"]
[PlyCount "78"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Bd2 Nb6 6. Bf4 Bg7 7. Nf3 0-0 8. e3 c5 9. dxc5 N6d7 10. Rc1 Nxc5 11. Qxd8 Rxd8 12. Nb5 Nba6 13. Be5 Be6 14. Bxg7 Kxg7 15. a3 Rac8 16. Nc3 Nb3 17. Rb1 Nac5 18. Be2 Bg4 19. h3 Bxf3 20. gxf3 e5 21. h4 h5 22. Rd1 Rxd1+ 23. Nxd1 Rd8 24. 0-0 Rd2 25. Bc4 a6 26. Kg2 b5 27. Bxb3 Nxb3 28. f4 exf4 29. exf4 Re2 30. f5 Nd4 31. fxg6 fxg6 32. Ne3 Kf6 33. Rd1 Ke5 34. b4 Ke4 35. Kg3 Ra2 36. Kg2 Rxa3 37. Rxd4+ Kxd4 38. Nc2+ Kc3 39. Nxa3 Kb2 0-1

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.16"]
[Round "4"]
[White "Krawczyk, Wojciech"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "1900"]
[BlackElo "1932"]
[PlyCount "81"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. g3 c6 6. Bg2 d5 7. cxd5 cxd5 8. 0-0 Nc6 9. Bf4 e6 10. Ne5 Nd7 11. Nxc6 bxc6 12. Bd6 Re8 13. e3 Ba6 14. Re1 Rc8 15. Qa4 Nb6 16. Qxa6 Qxd6 17. Rac1 Nc4 18. b3 Qa3 19. Qa4 Qxa4 20. Nxa4 Na3 21. Bf1 Bf8 22. Nc5 a5 23. Nd7 Be7 24. Nc5 Rc7 25. f4 Ra8 26. Kf2 Kf8 27. Kf3 Ke8 28. h4 Bxc5 29. Rxc5 a4 30. b4 Rb7 31. Rc3 Nb5 32. Bxb5 cxb5 33. a3 f5 34. Rec1 h5 35. Rc7 Rab8 36. R1c6 Rxc7 37. Rxc7 Kf8 38. Ke2 Rb6 39. Kd2 Rb8 40. Rd7 Rb6 41. Rh7 1/2-1/2

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.15"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Jedrusik, Adam"]
[Result "1/2-1/2"]
[ECO "E21"]
[WhiteElo "1932"]
[BlackElo "1821"]
[PlyCount "60"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 0-0 5. Nf3 c5 6. a3 Bxc3 7. Bxc3 Ne4 8. Rc1 b6 9. e3 Bb7 10. Be2 d6 11. 0-0 Nd7 12. Ne1 Qc7 13. Bf3 Ndf6 14. dxc5 Nxc3 15. Rxc3 Bxf3 16. Nxf3 dxc5 17. Qc2 e5 18. e4 Rad8 19. Re3 Nd7 20. Rd1 Nb8 21. Red3 Nc6 22. Rxd8 Rxd8 23. Rxd8+ Qxd8 24. Qd2 Qxd2 25. Nxd2 Kf8 26. Kf1 Ke7 27. Ke2 Kd6 28. Kd3 Nd4 29. Nb1 Ne6 30. Ke3 Nd4 1/2-1/2

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.14"]
[Round "2"]
[White "Musial, Tomasz"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "2123"]
[BlackElo "1932"]
[PlyCount "33"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Qe2 Qe7 7. Nc3 d6 8. Bg5 Qe6 9. Qc4 d5 10. Qa4 Nxe4 11. Nxe4 Qxe4+ 12. Qxe4+ dxe4 13. 0-0-0 Bf5 14. Ba6 Bc5 15. Bb7 Rb8 16. Bxc6+ Kf8 17. Rd5 1-0

[Event "POL-ch U18"]
[Site "Szklarska Poreba"]
[Date "2021.03.13"]
[Round "1"]
[White "Czechowski, Jakub"]
[Black "Baum, Jonasz"]
[Result "1/2-1/2"]
[ECO "E42"]
[WhiteElo "1932"]
[BlackElo "2262"]
[PlyCount "62"]
[EventDate "2021.03.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 201 Extra"]
[Source "ChessBase"]
[SourceDate "2021.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nge2 dxc4 7. Bxc4 c5 8. a3 Bxc3+ 9. Nxc3 cxd4 10. exd4 Nc6 11. Be3 b6 12. 0-0 Bb7 13. Ba2 Ne7 14. Bg5 Ng6 15. h4 h6 16. h5 Ne7 17. Bxf6 gxf6 18. Qg4+ Kh7 19. Qf4 f5 20. d5 Rg8 21. f3 Nxd5 22. Nxd5 Bxd5 23. Rad1 Qg5 24. Qxg5 Rxg5 25. Bxd5 exd5 26. Rxd5 Rag8 27. Rf2 Rc8 28. Rd7 Rc1+ 29. Rf1 Rc2 30. Rf2 Rc1+ 31. Rf1 Rc2 1/2-1/2

[Event "Baltic Pearl op 16th"]
[Site "Lazy"]
[Date "2020.06.29"]
[Round "2"]
[White "Szpar, Milosz"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C98"]
[WhiteElo "2343"]
[BlackElo "2025"]
[PlyCount "80"]
[EventDate "2020.06.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Nc6 13. d5 Nd8 14. a4 Rb8 15. axb5 axb5 16. b4 c4 17. Nf1 Ne8 18. Ng3 g6 19. Bh6 Ng7 20. Nh2 f6 21. Rf1 Nf7 22. Be3 Bd7 23. Ra7 Qc8 24. Qa1 Bd8 25. Kh1 Bb6 26. Bxb6 Rxb6 27. Qa5 Rb7 28. Nf3 Ne8 29. Ra1 Nc7 30. Kh2 Qb8 31. Nf1 Rb6 32. Qa2 Rb7 33. Ra5 Kg7 34. Ne3 Qc8 35. Qb1 Rb8 36. R1a3 Qb7 37. Ra7 Qb6 38. Qa1 Bc8 39. Kg1 Bb7 40. Nd2 Ra8 1/2-1/2

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.13"]
[Round "8"]
[White "Baum, Jonasz"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "D78"]
[WhiteElo "2391"]
[BlackElo "1964"]
[PlyCount "67"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 c6 5. Bg2 d5 6. 0-0 0-0 7. Qb3 a5 8. Rd1 a4 9. Qb4 dxc4 10. Qxc4 Nbd7 11. Bf4 Nb6 12. Qc1 Nfd5 13. Bh6 Bg4 14. Bxg7 Kxg7 15. h3 Bxf3 16. Bxf3 f5 17. Nd2 Qd6 18. e4 fxe4 19. Nxe4 Qc7 20. Bg2 Rad8 21. Re1 Qc8 22. Re2 h6 23. Qc2 Rf7 24. Nc5 Nc7 25. Nxa4 Nxa4 26. Qxa4 Rd6 27. Qb4 Na6 28. Qc3 Kh7 29. d5 c5 30. Rae1 Qd8 31. h4 h5 32. Re5 b6 33. Qe3 Rd7 34. Qd3 1-0

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.13"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Zabron, Maksym"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "1964"]
[BlackElo "2023"]
[PlyCount "95"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. Bg5 Be7 7. e3 Nbd7 8. Rc1 0-0 9. cxd5 exd5 10. Bd3 h6 11. Bf4 c6 12. h3 Re8 13. 0-0 Nf8 14. Bh2 Bd6 15. Ne5 Rc8 16. f4 c5 17. Qf3 Ne6 18. Ne2 Ne4 19. Rcd1 Qc7 20. h4 f5 21. g4 Bxe5 22. fxe5 fxg4 23. Qxg4 Rcd8 24. Nf4 Qe7 25. Bb5 Nxf4 26. Bxe8 Ne2+ 27. Qxe2 Rxe8 28. Rf4 c4 29. Rdf1 Bc8 30. Rxe4 dxe4 31. Qxc4+ Qe6 32. Rc1 Qxc4 33. Rxc4 Be6 34. Rc6 Kf7 35. Rd6 Rc8 36. Bf4 Rc1+ 37. Kf2 Rc2+ 38. Ke1 Rxb2 39. d5 Bg4 40. e6+ Ke8 41. Rd7 Re2+ 42. Kf1 Rd2 43. Kg1 Bh3 44. Be5 Rc2 45. Rxg7 Rc5 46. Bd6 Rc1+ 47. Kh2 Bxe6 48. dxe6 1-0

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.12"]
[Round "6"]
[White "Koziorowicz, Michal"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2099"]
[BlackElo "1964"]
[PlyCount "114"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nb3 Be6 8. Be3 h5 9. Qd2 Nbd7 10. 0-0-0 Rc8 11. h3 h4 12. f4 b5 13. Bd3 Be7 14. Kb1 Nb6 15. fxe5 dxe5 16. Qf2 Nfd7 17. Nd5 Nc4 18. Bc1 Bd6 19. g3 a5 20. gxh4 a4 21. Nd2 Bf8 22. Nf3 f6 23. Qa7 Bf7 24. b3 axb3 25. cxb3 Bc5 26. Qa6 0-0 27. Bxc4 bxc4 28. Qxc4 Nb6 29. Qe2 Nxd5 30. exd5 Bb4 31. Rhg1 Qd7 32. Qe4 Bc5 33. Rg2 Be6 34. Qe2 Bxh3 35. Rg3 Bf5+ 36. Ka1 Bb4 37. Bb2 Rc2 38. Qe3 Rfc8 39. Nxe5 fxe5 40. Qxe5 Rxb2 41. Qxb2 Rc2 42. Qd4 Bc5 43. Qa4 Qe7 44. Rgd3 Bxd3 45. Qf4 Bd6 46. Qg5 Qxg5 47. hxg5 Be5+ 48. Kb1 Bf5 49. a4 Rb2+ 50. Kc1 Rb1+ 51. Kd2 Bc3+ 52. Kxc3 Rxd1 53. b4 Rxd5 54. b5 Be4 55. Kb4 Rxg5 56. b6 Re5 57. a5 Rxa5 0-1

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.11"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Celebias, Filip"]
[Result "1-0"]
[ECO "B14"]
[WhiteElo "1964"]
[BlackElo "1558"]
[PlyCount "159"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 c5 5. e3 cxd4 6. exd4 d5 7. Nf3 Nc6 8. c5 b6 9. Bb5 Bd7 10. Bxc6 Bxc6 11. Ne5 Qc7 12. Nd3 bxc5 13. dxc5 Bxc3 14. Bxc3 a5 15. 0-0 Qe7 16. Rc1 0-0 17. Re1 Rfd8 18. Ne5 Be8 19. Qd4 Rdc8 20. Ng4 Nh5 21. Bd2 Kh8 22. Qxd5 Rd8 23. Qg5 f6 24. Qe3 e5 25. f3 Rd5 26. Nf2 Qf7 27. Qc3 Bc6 28. Rcd1 Qg6 29. Bc1 a4 30. Rxd5 Bxd5 31. Rd1 Bc6 32. Rd6 Rc8 33. Qd3 Qxd3 34. Nxd3 Bb5 35. g4 Bxd3 36. Rxd3 Nf4 37. Bxf4 exf4 38. b4 axb3 39. axb3 Kg8 40. b4 Kf7 41. Rd7+ Ke6 42. Rxg7 Rb8 43. Rxh7 Rxb4 44. Rh5 Rb1+ 45. Kf2 Rb2+ 46. Kf1 Rb1+ 47. Ke2 Rb2+ 48. Kd3 Rb3+ 49. Kd4 Rxf3 50. Ke4 Rf1 51. Rf5 Rh1 52. Rh5 Rf1 53. Rh3 Rc1 54. Kd4 Rg1 55. Rc3 Rxg4 56. c6 f3+ 57. Ke3 Rg8 58. c7 Kd7 59. Kxf3 Kc8 60. Kf4 Rh8 61. h3 Rh5 62. Kg4 Rg5+ 63. Kf4 Rh5 64. Kg3 Rg5+ 65. Kh2 Rh5 66. Rc4 Rg5 67. h4 Rg6 68. Kh3 f5 69. h5 Rg1 70. Kh4 f4 71. Rxf4 Kxc7 72. Rd4 Rh1+ 73. Kg5 Rg1+ 74. Rg4 Rd1 75. h6 Rd5+ 76. Kg6 Rd6+ 77. Kh5 Rd5+ 78. Rg5 Rd6 79. Rg7+ Rd7 80. Rxd7+ 1-0

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.10"]
[Round "4"]
[White "Suder, Jakub"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "D87"]
[WhiteElo "2085"]
[BlackElo "1964"]
[PlyCount "47"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[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. h4 cxd4 10. cxd4 Nc6 11. Be3 Qa5+ 12. Kf1 h5 13. Rc1 e6 14. Bg5 b5 15. Bb3 Bb7 16. g4 hxg4 17. h5 Rae8 18. h6 Bh8 19. h7+ Kg7 20. Bh6+ Kf6 21. Rxc6 Bxc6 22. Qc1 b4 23. Qxc6 Rc8 24. e5+ 1-0

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.09"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Luczak, Filip"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "1964"]
[BlackElo "2179"]
[PlyCount "42"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[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 a5 10. Ba3 axb4 11. Bxb4 Re8 12. c5 dxc5 13. Bxc5 c6 14. d6 Qa5 15. Be3 Qxc3 16. dxe7 Nxe4 17. Qd8 Be6 18. Rad1 Bf6 19. Rd3 Raxd8 20. exd8Q Rxd8 21. Rxc3 Nxc3 0-1

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.08"]
[Round "2"]
[White "Czechowski, Jakub"]
[Black "Luberanski, Jakub"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1964"]
[BlackElo "2151"]
[PlyCount "93"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Bf4 dxc4 4. d5 e5 5. Bg3 Nb4 6. Nc3 c6 7. dxc6 Qxd1+ 8. Rxd1 Nxc6 9. Nf3 f6 10. e3 Be6 11. Nd2 Na5 12. Nb5 Kf7 13. f4 exf4 14. Bxf4 a6 15. Nd4 Bb4 16. Be2 Bd5 17. Kf2 Bxd2 18. Rxd2 Ne7 19. Bc7 Nac6 20. Nxc6 bxc6 21. Rc1 Rac8 22. Bd6 Rhd8 23. Bc5 Ng6 24. Bb6 Re8 25. Bxc4 Bxc4 26. Rxc4 Ne5 27. Rc3 Ke6 28. h3 h5 29. Rdc2 Kd7 30. Ra3 Ra8 31. Bd4 Nf7 32. Rc5 Ng5 33. Rca5 Ne4+ 34. Ke2 Nd6 35. Rxa6 Rxa6 36. Rxa6 Nf5 37. Bc5 Rb8 38. b4 h4 39. Ra7+ Ke6 40. a4 Kd5 41. Kd3 Rd8 42. a5 g5 43. a6 Ke5+ 44. Kc3 Rd1 45. Ra8 Nd6 46. Bxd6+ Rxd6 47. a7 1-0

[Event "POL-ch U16"]
[Site "Szklarska Poreba"]
[Date "2020.03.07"]
[Round "1"]
[White "Werner, Kacper"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "1591"]
[BlackElo "1964"]
[PlyCount "42"]
[EventDate "2020.03.07"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "POL"]
[SourceTitle "CBM 195 Extra"]
[Source "ChessBase"]
[SourceDate "2020.05.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.05.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. d3 a6 6. c3 d6 7. b4 Ba7 8. Be3 0-0 9. Qc2 Ne7 10. Nbd2 Ng6 11. Bb3 h6 12. Rfe1 Nh5 13. Nf1 Qf6 14. Ng3 Nhf4 15. Qd2 Bg4 16. Bd1 Nxg2 17. Kxg2 Bxf3+ 18. Kg1 Nh4 19. Rf1 Qe6 20. Nf5 Qg6+ 21. Ng3 Qg4 0-1

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.31"]
[Round "9"]
[White "Malaczek, Mateusz"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "D79"]
[WhiteElo "2028"]
[BlackElo "1963"]
[PlyCount "73"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. c4 g6 2. Nf3 Bg7 3. g3 Nf6 4. Bg2 0-0 5. 0-0 c6 6. Nc3 d5 7. cxd5 cxd5 8. d4 Nc6 9. Ne5 e6 10. Nxc6 bxc6 11. Bf4 Nh5 12. Be3 Rb8 13. b3 c5 14. Rc1 Qf6 15. dxc5 d4 16. Ne4 Qe5 17. f4 Qc7 18. Bxd4 Rd8 19. Nd6 Ba6 20. Bxg7 Nxg7 21. Qc2 Nf5 22. Nxf5 exf5 23. Rfd1 Qe7 24. Rxd8+ Rxd8 25. e4 fxe4 26. Qxe4 Qd7 27. c6 Qd2 28. Qc2 Qe3+ 29. Kh1 Rd2 30. Qe4 Qf2 31. Qf3 Qd4 32. c7 Kg7 33. h4 Rd3 34. Qe4 Qd7 35. Qc6 Qg4 36. Qxa6 Qxg3 37. Qxd3 1-0

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.30"]
[Round "8"]
[White "Czechowski, Jakub"]
[Black "Goraj, Barbara"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "1963"]
[BlackElo "2044"]
[PlyCount "64"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 a6 7. Qd2 c5 8. d5 Nbd7 9. Nge2 Ne5 10. Ng3 h5 11. Be2 h4 12. Nf1 b5 13. cxb5 axb5 14. Nxb5 Ba6 15. Na3 c4 16. Bd4 Nd3+ 17. Bxd3 cxd3 18. Qf2 e6 19. dxe6 fxe6 20. Nd2 Ng4 21. Qg1 Ne5 22. Qe3 Kh7 23. 0-0 Bh6 24. f4 Nc6 25. Bc3 d5 26. Nb3 d4 27. Nxd4 Nxd4 28. Bxd4 d2 29. Qxd2 Bxf1 30. Rxf1 Bxf4 31. Qb4 Qc7 32. g3 Bd6 0-1

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.30"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Skurniak, Szymon"]
[Result "1-0"]
[ECO "B60"]
[WhiteElo "1963"]
[BlackElo "2030"]
[PlyCount "55"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Qb6 7. Be3 a6 8. Qd2 Ng4 9. Nd5 Qxb2 10. Rc1 Nxe3 11. fxe3 Kd8 12. Nxc6+ bxc6 13. Qa5+ Ke8 14. Nc7+ Kd7 15. Nxa8 Qxc1+ 16. Kf2 Qxc2+ 17. Be2 g6 18. Qc7+ Ke6 19. Qxc8+ Kf6 20. Nc7 Qxe4 21. Ne8+ Ke5 22. Qb7 Qf5+ 23. Ke1 Qc2 24. Rf1 e6 25. Qb4 Qc1+ 26. Kf2 Qc2 27. Qd4+ Kf5 28. Qf4# 1-0

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.29"]
[Round "6"]
[White "Bugajski, Robert"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2203"]
[BlackElo "1963"]
[PlyCount "137"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Nf3 Nc6 7. 0-0 Bg7 8. Nc3 0-0 9. Ne5 e6 10. Bf4 Nd7 11. Nxc6 bxc6 12. Rc1 Qb6 13. Na4 Qxd4 14. Qxd4 Bxd4 15. e3 Bg7 16. Bd6 Re8 17. Rxc6 Ne5 18. Rc7 Ba6 19. Rfc1 Nc4 20. Bc5 Nxb2 21. Nxb2 Bxb2 22. Rb1 Be5 23. Rxa7 Rxa7 24. Bxa7 Ra8 25. Bc5 Bd3 26. Rd1 Bc2 27. Rd2 Rxa2 28. Bd4 Bxd4 29. Rxd4 Ra1+ 30. Bf1 Rd1 31. f4 Rxd4 32. exd4 f6 33. Kf2 Kf7 34. Ke3 Ke7 35. h4 h6 36. Bb5 Bd1 37. Bd3 Kf7 38. Bb5 Bg4 39. Bd3 Bf5 40. Be2 h5 41. Bb5 Ke7 42. Ba4 Kd6 43. Bb5 Kc7 44. Be2 Kb6 45. Kd2 Ka5 46. Kc3 Ka4 47. Kb2 Kb4 48. Bf1 e5 49. fxe5 fxe5 50. dxe5 d4 51. Ba6 Kc5 52. Bb7 Kc4 53. Ba6+ Kd5 54. Kc1 Ke4 55. Kd2 Kxe5 56. Bb7 Kf6 57. Bc6 g5 58. hxg5+ Kxg5 59. Bf3 Bg6 60. Be2 Be4 61. Bd1 d3 62. Ke3 Bf5 63. Bf3 Bg4 64. Bc6 Be2 65. Bd7 Kf6 66. Be8 Kg5 67. Bd7 Bf1 68. Bc8 Kg6 69. Bd7 1/2-1/2

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.29"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Wielecki, Zygmunt"]
[Result "1-0"]
[ECO "E47"]
[WhiteElo "1963"]
[BlackElo "2095"]
[PlyCount "77"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 c6 6. Nge2 d6 7. a3 Ba5 8. Qc2 Nbd7 9. 0-0 e5 10. b4 Bc7 11. d5 c5 12. Bf5 Nb6 13. Bxc8 Qxc8 14. bxc5 dxc5 15. Qd3 Ne8 16. Ne4 Bd6 17. Bb2 Qd8 18. Rac1 f5 19. Nxd6 Qxd6 20. f4 e4 21. Qb3 Nd7 22. Ba1 b6 23. Nc3 Nc7 24. Qb2 Rf7 25. h3 a6 26. a4 Rb8 27. Rfd1 Ne8 28. Rd2 Qg6 29. Kh2 Nd6 30. Qa2 Qh5 31. Ne2 Rb7 32. a5 b5 33. cxb5 Nxb5 34. Nc3 Nxc3 35. Bxc3 Rf8 36. Rb1 Rxb1 37. Qxb1 Rb8 38. Rb2 Qe8 39. Qa1 1-0

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.28"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Wojtaszewski, Piotr"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1963"]
[BlackElo "2045"]
[PlyCount "78"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Be3 Nf6 4. Nc3 c6 5. f3 b5 6. Qd2 h5 7. e5 Nd5 8. Nxd5 cxd5 9. Bd3 Qb6 10. Ne2 Nc6 11. f4 e6 12. Bf2 b4 13. Bh4 a5 14. h3 a4 15. Qe3 a3 16. b3 d6 17. Qf2 Qc7 18. 0-0 Ne7 19. g4 hxg4 20. hxg4 Ba6 21. Rac1 Qd7 22. Kg2 Ng8 23. Rh1 f5 24. exf6 Bxd3 25. cxd3 Nxf6 26. Qf3 Rf8 27. Rhe1 Kf7 28. Ng1 Rac8 29. Nh3 Kg8 30. Rxc8 Qxc8 31. Ng5 e5 32. dxe5 dxe5 33. fxe5 Ne4 34. Qh3 Qc2+ 35. Kh1 Nxg5 36. Bxg5 Bxe5 37. Qh6 Qxd3 38. Qh3 Qc2 39. Qh6 Qd3 0-1

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.28"]
[Round "4"]
[White "Falkowski, Dawid"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C33"]
[WhiteElo "1957"]
[BlackElo "1963"]
[PlyCount "63"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 e5 2. f4 exf4 3. Bc4 Ne7 4. Nc3 Ng6 5. d4 Bb4 6. Nf3 0-0 7. 0-0 c6 8. d5 Qe7 9. Qe2 Re8 10. Bd2 b5 11. Bb3 Ba6 12. Qf2 Bc5 13. Nd4 Qf6 14. Nce2 Bxd4 15. Qxd4 Qxd4+ 16. Nxd4 c5 17. Nf5 c4 18. Nd6 Rf8 19. a4 cxb3 20. axb5 Bc8 21. cxb3 Na6 22. bxa6 Rb8 23. Rfc1 Ne7 24. Bxf4 Rxb3 25. Rc7 Rxb2 26. Rxa7 Ng6 27. Bg3 h5 28. h4 Rb3 29. Kh2 Rb8 30. Rc7 Ra8 31. a7 Ne7 32. Nc4 1-0

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.27"]
[Round "1"]
[White "Czechowski, Jakub"]
[Black "Adamski, Jan"]
[Result "1/2-1/2"]
[ECO "B41"]
[WhiteElo "1963"]
[BlackElo "2170"]
[PlyCount "55"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Nc6 5. d4 cxd4 6. Nxd4 Bb4 7. Nxc6 dxc6 8. Qxd8+ Kxd8 9. Be3 e5 10. 0-0-0+ Ke7 11. Na4 Nf6 12. Nb6 Rb8 13. a3 Bd6 14. Nxc8+ Rhxc8 15. c5 Bc7 16. f3 Nd7 17. Bc4 Nf8 18. g3 Ne6 19. Rd2 Rd8 20. Rf2 a5 21. Bxe6 Kxe6 22. Rd1 Rxd1+ 23. Kxd1 f5 24. Rc2 h5 25. exf5+ Kxf5 26. Rc4 g6 27. Ke2 Ke6 28. Rc3 1/2-1/2

[Event "Warsaw Przepiorka Memorial"]
[Site "Warsaw"]
[Date "2019.12.27"]
[Round "2"]
[White "Pacan Milej, Kosma"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2315"]
[BlackElo "1963"]
[PlyCount "45"]
[EventDate "2019.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Be3 e5 7. d5 Nbd7 8. g4 Nc5 9. f3 a5 10. h4 h5 11. g5 Nfd7 12. Nh3 f5 13. gxf6 Nxf6 14. Qd2 Nh7 15. 0-0-0 Bd7 16. Rdg1 Rf6 17. f4 Bxh3 18. fxe5 Bg4 19. exf6 Nxf6 20. e5 Nfe4 21. Nxe4 Nxe4 22. Qc2 Bxe2 23. Rxg6 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2019.01.04"]
[Round "9"]
[White "Buchta, Agnieszka"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "1856"]
[BlackElo "1840"]
[PlyCount "59"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Ne4 7. Nxd4 Bd7 8. Bxc6 bxc6 9. 0-0 Bc5 10. f3 Ng5 11. f4 Ne4 12. Be3 Bb6 13. Nc3 Nxc3 14. bxc3 0-0 15. Qf3 f6 16. Qg3 Qe7 17. Rae1 c5 18. Nb3 fxe5 19. fxe5 Rxf1+ 20. Rxf1 Rf8 21. Rxf8+ Qxf8 22. Qf2 Qxf2+ 23. Kxf2 c4 24. Nc5 Bf5 25. Bd4 Kf7 26. Ke3 Bxc2 27. Kf4 g6 28. Kg5 h5 29. g3 Bf5 30. Bf2 1/2-1/2

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2019.01.03"]
[Round "8"]
[White "Czechowski, Jakub"]
[Black "Libura, Julianna"]
[Result "1-0"]
[ECO "D64"]
[WhiteElo "1840"]
[BlackElo "1587"]
[PlyCount "123"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 0-0 6. Rc1 Nbd7 7. Nf3 c6 8. Bd3 Re8 9. 0-0 h6 10. Bh4 a6 11. Qc2 dxc4 12. Bxc4 b5 13. Bd3 c5 14. Rfd1 c4 15. Bf1 Bb7 16. a4 Qb6 17. Nd2 Rac8 18. axb5 axb5 19. b3 cxb3 20. Qxb3 b4 21. Na2 Bd5 22. Bc4 Qb7 23. Bxd5 exd5 24. Rb1 Qa6 25. Bxf6 Nxf6 26. Nxb4 Bxb4 27. Qxb4 Qe2 28. Re1 Qh5 29. Qb3 Re6 30. Nf1 Qg5 31. Rbc1 Rce8 32. f3 h5 33. Qb2 h4 34. Qf2 Nh5 35. Kh1 Rg6 36. Rc2 Nf6 37. Rc5 h3 38. g4 Nd7 39. Rc2 f5 40. gxf5 Qxf5 41. Ng3 Qg5 42. f4 Qe7 43. Qf3 Nf6 44. Rce2 Qa3 45. Nh5 Ne4 46. Qxh3 Qa5 47. Rg1 Rxg1+ 48. Kxg1 Qa1+ 49. Qf1 Qa6 50. Nxg7 Qg6+ 51. Rg2 Qxg7 52. Rxg7+ Kxg7 53. Qh3 Kf6 54. Qd7 Rg8+ 55. Kf1 Nd2+ 56. Ke1 Nf3+ 57. Kf2 Nxh2 58. Qxd5 Ng4+ 59. Ke2 Rg7 60. Qc6+ Kf5 61. d5 Ke4 62. Qe6+ 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2019.01.02"]
[Round "7"]
[White "Nasirov, Ruslan"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2062"]
[BlackElo "1840"]
[PlyCount "59"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 g6 3. e4 d6 4. f4 c5 5. Nf3 Bg7 6. Be2 0-0 7. 0-0 Nc6 8. d3 a6 9. Qe1 Rb8 10. a4 e6 11. Qh4 Nd4 12. f5 Nb3 13. fxg6 Nxa1 14. Ng5 fxg6 15. Rxf6 Rxf6 16. Qxh7+ Kf8 17. e5 Rf5 18. Qxg6 Rxg5 19. Bxg5 Qe8 20. Qh7 d5 21. Bh5 Qd7 22. Bh6 Ke7 23. Qxg7+ Kd8 24. Qf8+ Kc7 25. Qxc5+ Qc6 26. Bf8 Qxc5+ 27. Bxc5 Kd7 28. Bd6 Ra8 29. cxd5 exd5 30. Nxd5 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2018.12.30"]
[Round "5"]
[White "Czechowski, Jakub"]
[Black "Alothman, Abdul Wahab"]
[Result "0-1"]
[ECO "D47"]
[WhiteElo "1840"]
[BlackElo "1965"]
[PlyCount "34"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. e4 b4 10. Ne2 c5 11. Ng3 cxd4 12. Nxd4 Bc5 13. Be3 Qb6 14. Nc2 0-0 15. Bf4 Bxf2+ 16. Kf1 Nc5 17. e5 Nxd3 0-1

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2018.12.29"]
[Round "3"]
[White "Czechowski, Jakub"]
[Black "Marzec, Karol"]
[Result "1-0"]
[ECO "E83"]
[WhiteElo "1840"]
[BlackElo "1996"]
[PlyCount "127"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d6 4. e4 Bg7 5. f3 0-0 6. Be3 Nc6 7. Nge2 Rb8 8. a4 a5 9. Qd2 b6 10. Nb5 Nb4 11. Nc1 c6 12. Nc3 Ba6 13. Nd3 c5 14. Nxb4 axb4 15. Nb5 Bxb5 16. cxb5 Nd7 17. Be2 Qc7 18. 0-0 cxd4 19. Bxd4 Bxd4+ 20. Qxd4 Qc5 21. Qxc5 Nxc5 22. Bc4 b3 23. Ra3 Rfc8 24. Bxb3 Nxb3 25. Rxb3 Rc2 26. h3 Kf8 27. Rf2 Rc1+ 28. Kh2 Ke8 29. Rd2 Ra1 30. Rb4 Ra2 31. Rc2 Kd7 32. Rbc4 Rb7 33. Kg3 h6 34. Kf2 Ra1 35. Ke3 Re1+ 36. Kd3 Rg1 37. b3 Rb1 38. Kc3 Rc7 39. Kb4 Rc5 40. Ka3 Ra1+ 41. Kb2 Rg1 42. b4 Rxc4 43. Rxc4 Rxg2+ 44. Kb3 Rf2 45. Rc3 f5 46. exf5 gxf5 47. a5 bxa5 48. bxa5 Rf1 49. b6 Rb1+ 50. Ka4 e5 51. Rc7+ Kd8 52. Rh7 e4 53. fxe4 fxe4 54. Rxh6 Kd7 55. Rh7+ Ke6 56. Rh8 Kd7 57. b7 Kc7 58. b8Q+ Rxb8 59. Rxb8 Kxb8 60. Kb3 Ka7 61. h4 e3 62. Kc3 d5 63. h5 d4+ 64. Kd3 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2018.12.29"]
[Round "4"]
[White "Janus, Przemyslaw"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "E81"]
[WhiteElo "2091"]
[BlackElo "1840"]
[PlyCount "61"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Bg5 c5 7. d5 e6 8. Qd2 exd5 9. Nxd5 Be6 10. Ne2 Bxd5 11. cxd5 h6 12. Be3 Nbd7 13. Nc3 a6 14. a4 h5 15. Be2 Rb8 16. 0-0 Qc7 17. Rfc1 c4 18. a5 b5 19. axb6 Nxb6 20. Rxa6 Nfd7 21. Nb5 Qc8 22. Ra7 Qd8 23. Nxd6 c3 24. Rxc3 Bxc3 25. Qxc3 Qf6 26. Qxf6 Nxf6 27. Bh6 Nc8 28. Ra6 Nxd6 29. Rxd6 Rfc8 30. Rxf6 Rxb2 31. Bf1 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2018.12.28"]
[Round "2"]
[White "Szczecina, Kamil"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "1986"]
[BlackElo "1840"]
[PlyCount "53"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. 0-0 e5 7. Ne1 Nge7 8. f4 0-0 9. Nc3 f5 10. Be3 Be6 11. Qd2 Nd4 12. fxe5 dxe5 13. exf5 gxf5 14. Bxb7 Rb8 15. Bg2 Rxb2 16. Na4 Rb5 17. c3 Qa5 18. cxd4 Qxa4 19. dxe5 Bxe5 20. Rc1 Nd5 21. Bh6 Bd4+ 22. Kh1 f4 23. Bxf8 Kxf8 24. Qe2 Be3 25. Rc4 Qa6 26. Re4 Kg7 27. gxf4 1-0

[Event "Krakow op-B 29th"]
[Site "Krakow"]
[Date "2018.12.27"]
[Round "1"]
[White "Czechowski, Jakub"]
[Black "Pastuszko, Kinga"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "1840"]
[BlackElo "2029"]
[PlyCount "47"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 189 Extra"]
[Source "ChessBase"]
[SourceDate "2019.06.03"]
[SourceVersion "1"]
[SourceVersionDate "2019.06.03"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. Nc3 Nf6 5. e3 e5 6. dxe5 Nxe5 7. Be2 Bxf3 8. Bxf3 Nxc4 9. Nxd5 c6 10. Nxf6+ Qxf6 11. 0-0 Bd6 12. Be2 Ne5 13. b3 Rd8 14. Qc2 0-0 15. Bb2 Qh6 16. g3 Rfe8 17. Rad1 Re6 18. Ba3 Qh3 19. f4 Ng4 20. Bxg4 Qxg4 21. f5 Rh6 22. f6 Bc7 23. Rxd8+ Bxd8 24. Qc5 1-0

[Event "Trzcianka Dziedzic Memorial 8th"]
[Site "Trzcianka"]
[Date "2018.10.14"]
[Round "9"]
[White "Czerwonski, Aleksander"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2365"]
[BlackElo "1866"]
[PlyCount "63"]
[EventDate "2018.10.14"]
[EventType "swiss (rapid)"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 c5 7. Nge2 cxd4 8. Nxd4 Nc6 9. Be2 a5 10. Ndb5 Be6 11. 0-0 Ne5 12. b3 Nfd7 13. f4 Nc6 14. f5 a4 15. fxe6 fxe6 16. Bg4 axb3 17. Bxe6+ Kh8 18. axb3 Rxa1 19. Qxa1 Nc5 20. Rxf8+ Qxf8 21. Bxc5 dxc5 22. Qf1 Qd8 23. Nd5 Ne5 24. Nbc7 Qb8 25. h3 b6 26. Qd1 h5 27. Kh1 Qa7 28. Nb5 Qa2 29. Nxe7 Kh7 30. Bg8+ Kh8 31. Be6 Qf2 32. Nxg6+ 1-0

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.29"]
[Round "9.26"]
[White "Czechowski, Jakub"]
[Black "Butyrowski, Marcel"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "1880"]
[BlackElo "1725"]
[PlyCount "163"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Be3 Nf6 7. Bc4 0-0 8. Bb3 a5 9. 0-0 a4 10. Nxa4 Nxe4 11. Nb5 d5 12. Bb6 Qd7 13. Nc7 Rxa4 14. Bxa4 Bxb2 15. Qxd5 Bxa1 16. Rxa1 Nc3 17. Qxd7 Bxd7 18. Bb3 Bf5 19. f3 Ne2+ 20. Kf2 Ned4 21. Rd1 Bxc2 22. Rxd4 Nxd4 23. Bxd4 Bxb3 24. axb3 Rd8 25. Ke3 Rd7 26. Nb5 e5 27. Bc5 Rd1 28. b4 Rb1 29. Kd3 Rb2 30. Nd6 b6 31. Kc3 Rxg2 32. Bxb6 Rxh2 33. Bc5 Rh3 34. b5 Rxf3+ 35. Kc4 Rf4+ 36. Kd5 Rf1 37. b6 Rb1 38. Kxe5 Kg7 39. b7 h6 40. Ba7 Rxb7 41. Nxb7 h5 42. Nd6 f6+ 43. Ke6 g5 44. Kf5 h4 45. Ne8+ Kh6 46. Bc5 h3 47. Bf8+ Kh5 48. Nxf6+ Kh4 49. Ng4 Kg3 50. Kxg5 Kg2 51. Bd6 Kf3 52. Kh4 Kg2 53. Bb8 Kf3 54. Kxh3 Ke4 55. Kg3 Kf5 56. Kf3 Ke6 57. Ke4 Kd7 58. Kd5 Kc8 59. Bg3 Kb7 60. Kd6 Kb8 61. Ne3 Kb7 62. Nd5 Kb8 63. Kc6+ Ka8 64. Nb6+ Ka7 65. Bf4 Ka6 66. Bb8 Ka5 67. Nd5 Ka6 68. Nb4+ Ka5 69. Kc5 Ka4 70. Kc4 Ka3 71. Be5 Ka4 72. Bc7 Ka3 73. Nd3 Ka4 74. Nc5+ Ka3 75. Kc3 Ka2 76. Bf4 Ka3 77. Bc1+ Ka2 78. Ne4 Ka1 79. Kb3 Kb1 80. Ba3 Ka1 81. Bb2+ Kb1 82. Nc3# 1-0

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.28"]
[Round "8.8"]
[White "Jarzebowski, Kacper"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "1969"]
[BlackElo "1880"]
[PlyCount "96"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 Nc6 6. Nge2 e5 7. d5 Nd4 8. 0-0 0-0 9. Bg5 h6 10. Be3 Ng4 11. Bd2 f5 12. f3 Nf6 13. exf5 Nxe2+ 14. Nxe2 gxf5 15. f4 e4 16. Bc2 c6 17. Bc3 Qb6+ 18. Bd4 c5 19. Bc3 Ng4 20. Qd2 Rf7 21. h3 Nf6 22. Kh2 Bd7 23. Qe3 Qc7 24. a4 Re8 25. a5 Kh8 26. Rfb1 b5 27. axb6 axb6 28. b4 b5 29. bxc5 bxc4 30. c6 Bc8 31. Rb5 Rg8 32. Bd4 Qd8 33. Ra8 Kh7 34. Ng3 Ng4+ 35. hxg4 Qh4+ 36. Kg1 Bxd4 37. Qxd4 Qxg3 38. Qf2 Qxg4 39. Ra3 Rfg7 40. g3 Qh3 41. Ra7 Rxa7 42. Qxa7+ Rg7 43. Qxg7+ Kxg7 44. Rb8 Qxg3+ 45. Kh1 e3 46. Bd1 c3 47. Rxc8 c2 48. Rc7+ Kf6 0-1

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.27"]
[Round "7.20"]
[White "Czechowski, Jakub"]
[Black "Lambrecht, Tomasz"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "1880"]
[BlackElo "1544"]
[PlyCount "99"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd1 exd5 7. e3 Nf6 8. Nf3 Bc5 9. Be2 0-0 10. 0-0 a6 11. a3 Ba7 12. b4 d4 13. exd4 Nxd4 14. Nxd4 Qxd4 15. Bb2 Qh4 16. g3 Qh3 17. Nd5 Nxd5 18. Qxd5 Rb8 19. Bc4 Qf5 20. Rae1 Qxd5 21. Bxd5 Bh3 22. Bg2 Bxg2 23. Kxg2 f6 24. Rd1 Rfd8 25. Kf3 Kf7 26. Rxd8 Rxd8 27. Rc1 Bb6 28. Bc3 Rd7 29. Rc2 Rd8 30. a4 Rd7 31. Ke2 Ke6 32. f4 Bc7 33. Bd2 Bb6 34. Be3 Bxe3 35. Kxe3 f5 36. Rc4 h5 37. h4 g6 38. Rc5 Rd5 39. Rc8 Rd7 40. Rc5 Kf6 41. Rc4 Ke6 42. a5 Rd5 43. Rc2 Rb5 44. Rb2 b6 45. axb6 a5 46. Kd4 axb4 47. Kc4 Rxb6 48. Re2+ Kf6 49. Rb2 Re6 50. Kxb4 1/2-1/2

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.26"]
[Round "6.14"]
[White "Pietrzak, Tomasz1111"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "E97"]
[WhiteElo "1617"]
[BlackElo "1880"]
[PlyCount "76"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[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. a4 Nh5 10. a5 Nf4 11. Ne1 Nxe2+ 12. Qxe2 f5 13. f3 f4 14. Nd3 g5 15. b4 Ng6 16. Nf2 h5 17. c5 Nh4 18. h3 Qf6 19. Ba3 Qg6 20. Rac1 g4 21. hxg4 hxg4 22. Nxg4 Bxg4 23. fxg4 f3 24. gxf3 Nxf3+ 25. Rxf3 Qxg4+ 26. Kf2 Rxf3+ 27. Qxf3 Rf8 28. Qxf8+ Kxf8 29. Rf1 Ke7 30. b5 Bh6 31. b6 axb6 32. cxd6+ cxd6 33. Nb5 Qf4+ 34. Kg2 Qxe4+ 35. Kf2 Be3+ 36. Kg3 Bf4+ 37. Kf2 Qe3+ 38. Kg2 Qg3+ 0-1

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.25"]
[Round "5.14"]
[White "Czechowski, Jakub"]
[Black "Golenia, Wojciech"]
[Result "0-1"]
[ECO "D34"]
[WhiteElo "1880"]
[BlackElo "1984"]
[PlyCount "78"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. h3 h6 9. 0-0 0-0 10. dxc5 Bxc5 11. Na4 Ne4 12. Nxc5 Nxc5 13. Be3 Ne4 14. Rc1 Re8 15. Bd4 Bf5 16. b3 Ng5 17. Nxg5 Qxg5 18. Bb2 Be4 19. Rc5 Qe7 20. Ba3 Bxg2 21. Kxg2 Qxe2 22. Rxd5 Qxa2 23. Bc1 Rad8 24. Rxd8 Rxd8 25. Qg4 h5 26. Qxh5 Qxb3 27. Be3 Qe6 28. Rd1 Rxd1 29. Qxd1 a6 30. h4 b5 31. Qd3 Ne5 32. Qd8+ Kh7 33. Qa8 Nc4 34. Bf4 a5 35. Qb7 b4 36. Qf3 f5 37. Qh5+ Kg8 38. Qg5 b3 39. h5 Qf6 0-1

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.24"]
[Round "4.20"]
[White "Galuszka, Tomasz"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "1989"]
[BlackElo "1880"]
[PlyCount "173"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. d3 d6 6. Nbd2 c5 7. e4 Nc6 8. Re1 d5 9. exd5 e5 10. Nc4 Nxd5 11. Ng5 Re8 12. Ne3 Re7 13. Ne4 Nc7 14. a4 Ne6 15. Nc3 Ncd4 16. Nc4 Rb8 17. Be3 f6 18. Bxd4 b6 19. Ne3 Nxd4 20. Ne2 Nxe2+ 21. Qxe2 Be6 22. c4 Qd7 23. Nd5 Bh6 24. b3 Rf7 25. Rad1 Re8 26. Nc3 Kh8 27. Bd5 Rfe7 28. Bxe6 f5 29. Nd5 Rxe6 30. Qf1 Bg7 31. Re2 Qf7 32. f3 g5 33. Rde1 e4 34. dxe4 fxe4 35. Rxe4 Rxe4 36. fxe4 Rxe4 37. Re2 Qe6 38. Rxe4 Qxe4 39. Qd1 Bd4+ 40. Kf1 Qh1+ 41. Ke2 Qxh2+ 42. Kf3 Qh5+ 43. g4 Qf7+ 44. Ke4 Qe8+ 45. Kf3 h5 46. Qd2 Qf7+ 47. Kg2 h4 48. Qe2 Kg7 49. Ne7 Kf8 50. Nf5 Qb7+ 51. Kh2 Qb8+ 52. Kh3 Qe5 53. Qf3 Ke8 54. Qa8+ Kd7 55. Qxa7+ Qc7 56. Qa8 Qc6 57. Qa7+ Kd8 58. Qb8+ Kd7 59. Qa7+ Qc7 60. Qa8 Qc6 61. Qxc6+ Kxc6 62. Ne7+ Kb7 63. Nd5 Be5 64. Ne3 Kc6 65. Kg2 Bf4 66. Nd5 Bc7 67. Kf3 Bd8 68. Nc3 Kd6 69. Ke4 Ke6 70. Nd5 h3 71. Kf3 Ke5 72. Kg3 Kd4 73. Kxh3 Kd3 74. Kg3 Kc2 75. b4 cxb4 76. Nxb4+ Kb3 77. Nc6 Bc7+ 78. Kf3 Kxc4 79. Ke4 Kb3 80. Kf5 Kxa4 81. Kxg5 b5 82. Kf5 b4 83. Nxb4 Kxb4 84. g5 Bb6 85. Ke5 Kc4 86. g6 Ba7 87. g7 1/2-1/2

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.23"]
[Round "3.8"]
[White "Czechowski, Jakub"]
[Black "Polczyk, Mikolaj"]
[Result "0-1"]
[ECO "E81"]
[WhiteElo "1880"]
[BlackElo "2061"]
[PlyCount "62"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 a6 7. Qd2 Nbd7 8. Nge2 b5 9. cxb5 axb5 10. Nxb5 c6 11. Na3 e5 12. Nc3 d5 13. dxe5 Nxe5 14. Be2 dxe4 15. Qxd8 Rxd8 16. fxe4 Nd3+ 17. Bxd3 Rxd3 18. Bd2 Nxe4 19. Nxe4 Bxb2 20. Rd1 Rdxa3 21. Bh6 Bf5 22. Ng3 Bg4 23. Rd6 Re8+ 24. Kd2 Rxa2 25. Kd3 c5 26. Re1 Raa8 27. Rxe8+ Rxe8 28. Be3 c4+ 29. Kd2 c3+ 30. Kd3 Rxe3+ 31. Kxe3 c2 0-1

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.22"]
[Round "2.26"]
[White "Dixa, Oskar"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1929"]
[BlackElo "1880"]
[PlyCount "56"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. a4 g6 5. Bc4 Bg7 6. 0-0 e6 7. d3 Nge7 8. Re1 0-0 9. Bg5 a6 10. Qd2 Rb8 11. Rad1 Re8 12. Qf4 Ne5 13. Nxe5 Bxe5 14. Qh4 Bd7 15. Re3 b5 16. Rh3 h5 17. d4 cxd4 18. Be2 dxc3 19. Bxh5 Kg7 20. Bxg6 Rh8 21. Bh6+ Kg8 22. Bxf7+ Kxf7 23. Qh5+ Ng6 24. Rf3+ Bf6 25. g4 Rxh6 26. Qxh6 Qh8 27. Qxh8 Nxh8 28. g5 cxb2 0-1

[Event "POL-chT U20 1st League"]
[Site "Kudowa Zdroj"]
[Date "2018.07.21"]
[Round "1.2"]
[White "Karykowska, Anna"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "B70"]
[WhiteElo "1869"]
[BlackElo "1880"]
[PlyCount "74"]
[EventDate "2018.07.21"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 186 Extra"]
[Source "ChessBase"]
[SourceDate "2018.08.24"]
[SourceVersion "1"]
[SourceVersionDate "2018.08.24"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nde2 Nf6 7. g3 0-0 8. Bg2 d6 9. 0-0 Rb8 10. a4 a6 11. h3 Ne5 12. Ra2 b5 13. axb5 axb5 14. Nd4 b4 15. Nd5 Bb7 16. Re1 Ba8 17. b3 e6 18. Nxf6+ Bxf6 19. Be3 Qd7 20. Qe2 Nc6 21. Rd1 Ne7 22. Qd3 d5 23. Ne2 Qc6 24. exd5 Nxd5 25. Ra6 Qc7 26. Bd4 Bxd4 27. Nxd4 Bb7 28. Raa1 Rfd8 29. Bxd5 Rxd5 30. Qe2 Rbd8 31. Nf3 Qc6 32. Rxd5 Rxd5 33. Kh2 Rh5 34. g4 Rc5 35. Nh4 g5 36. Rg1 gxh4 37. Qd2 Qc7+ 0-1

[Event "Gorzow Wielkopolski Lasker Memor-B 2nd"]
[Site "Gorzow Wielkopolski"]
[Date "2018.07.07"]
[Round "7.2"]
[White "Czechowski, Jakub"]
[Black "Dzida, Kamil"]
[Result "0-1"]
[ECO "E48"]
[WhiteElo "1880"]
[BlackElo "1854"]
[PlyCount "54"]
[EventDate "2018.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. Nge2 dxc4 7. Bxc4 e5 8. 0-0 exd4 9. exd4 Nc6 10. Bg5 h6 11. Bh4 Bd6 12. Qd2 Ne4 13. Nxe4 Bxh2+ 14. Kxh2 Qxh4+ 15. Kg1 Qxe4 16. Rad1 Bd7 17. Nc3 Qg6 18. Nd5 Rad8 19. Rfe1 Qd6 20. Nc3 a6 21. Ne4 Qg6 22. Qf4 Rfe8 23. f3 Bc8 24. Qxc7 Re7 25. Qb6 Bh3 26. Bf1 Red7 27. Re2 Nxd4 0-1

[Event "Gorzow Wielkopolski Lasker Memor-B 2nd"]
[Site "Gorzow Wielkopolski"]
[Date "2018.07.05"]
[Round "5.6"]
[White "Czechowski, Jakub"]
[Black "Przysiecki, Kajetan"]
[Result "1/2-1/2"]
[ECO "B08"]
[WhiteElo "1880"]
[BlackElo "1771"]
[PlyCount "137"]
[EventDate "2018.07.02"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "POL"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. a4 g6 5. Bc4 Bg7 6. Nf3 0-0 7. 0-0 b6 8. h3 d5 9. exd5 cxd5 10. Bd3 Ba6 11. Bf4 Bxd3 12. Qxd3 Nc6 13. Bh2 e6 14. Rfe1 a6 15. Qe3 Re8 16. Ne5 Nb4 17. Qd2 Rc8 18. Rac1 Bf8 19. Bf4 Nh5 20. Be3 f6 21. Ng4 Rc7 22. Ne2 Nc6 23. Bf4 Nxf4 24. Nxf4 Kf7 25. Re3 f5 26. Ne5+ Nxe5 27. Rxe5 Bg7 28. Re2 Bh6 29. Rce1 Qd6 30. Re5 Rce7 31. g3 Bg7 32. R5e2 Qc6 33. c3 Qxa4 34. Qe3 Qd7 35. Qd3 b5 36. Ra1 Qc6 37. h4 Ra8 38. Rae1 Rae8 39. Qf3 Bf6 40. Kg2 b4 41. g4 fxg4 42. Qxg4 bxc3 43. bxc3 e5 44. dxe5 Bxe5 45. Qf3 Bxf4 46. Qxf4+ Qf6 47. Rxe7+ Rxe7 48. Rxe7+ Kxe7 49. Qc7+ Ke6 50. Qxh7 Kf5 51. h5 Qg5+ 52. Kf1 Qxh5 53. Qf7+ Ke4 54. Qe6+ Kd3 55. Qxa6+ Kxc3 56. Qa3+ Kd4 57. Qa7+ Ke5 58. Qe7+ Kf5 59. Qd7+ Kf4 60. Qd6+ Kg4 61. Qg3+ Kf5 62. Qd3+ Ke5 63. Qc3+ d4 64. Qc5+ Ke4 65. Qc6+ Kf4 66. Qd6+ Ke4 67. Qc6+ Kd3 68. Qa6+ Kc3 69. Qa3+ 1/2-1/2

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.30"]
[Round "7"]
[White "Czechowski, Jakub"]
[Black "Vasilenko, Ekaterina"]
[Result "0-1"]
[ECO "A88"]
[WhiteElo "1782"]
[BlackElo "1809"]
[PlyCount "56"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. d4 f5 2. c4 g6 3. g3 Nf6 4. Bg2 Bg7 5. Nc3 d6 6. Nf3 0-0 7. 0-0 c6 8. b4 Qe8 9. Bb2 e5 10. dxe5 dxe5 11. e4 f4 12. Qc2 Bg4 13. Na4 Nbd7 14. h3 Bxf3 15. Bxf3 Qe6 16. Kg2 g5 17. Be2 Rad8 18. Rad1 Qf7 19. Rd3 Rfe8 20. Qd2 Bf8 21. c5 Bd6 22. cxd6 h5 23. Bd1 Qg6 24. Bb3+ Kg7 25. f3 g4 26. gxf4 gxf3+ 27. Kh2 Nxe4 28. Qe1 Qg2# 0-1

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.29"]
[Round "6"]
[White "Mackiewicz, Anna"]
[Black "Czechowski, Jakub"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "1896"]
[BlackElo "1782"]
[PlyCount "32"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. b3 e5 2. Bb2 d6 3. e3 Nc6 4. Nf3 g6 5. d4 Bg7 6. dxe5 Nxe5 7. Nxe5 Bxe5 8. Bxe5 dxe5 9. Qxd8+ Kxd8 10. Bc4 Ke7 11. Nc3 c6 12. 0-0-0 Nf6 13. a4 Be6 14. Bxe6 fxe6 15. a5 Rhd8 16. h3 Kf7 1/2-1/2

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.29"]
[Round "5"]
[White "Wikar, Martyna"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "1880"]
[BlackElo "1782"]
[PlyCount "63"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. e4 c5 2. Ne2 d6 3. g3 g6 4. c3 Bg7 5. Bg2 Nc6 6. d4 cxd4 7. cxd4 e5 8. Be3 Nh6 9. h3 Qb6 10. d5 Nd4 11. Qd2 f5 12. 0-0 Nf7 13. Nbc3 Nxe2+ 14. Qxe2 Qd8 15. Rac1 0-0 16. Nb5 f4 17. gxf4 exf4 18. Bxf4 Ng5 19. Rxc8 Rxc8 20. Bxd6 Re8 21. Bg3 Nf7 22. Rd1 a6 23. Nd4 Bxd4 24. Rxd4 Nd6 25. Qg4 Qb6 26. e5 Nf5 27. Rb4 Qa5 28. a3 b5 29. Be4 Nxg3 30. Qxg3 Rc5 31. Bxg6 Re7 32. Bxh7+ 1-0

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.28"]
[Round "4"]
[White "Czechowski, Jakub"]
[Black "Pajak, Jakub Lech"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1782"]
[BlackElo "1943"]
[PlyCount "104"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. a4 Bb4 6. e4 b5 7. Bd2 Bb7 8. Qc2 Nf6 9. Be2 a6 10. 0-0 Qe7 11. Rfe1 Nbd7 12. e5 Nd5 13. Ne4 0-0 14. Bxb4 Nxb4 15. Qd2 Nb6 16. Nc5 N6d5 17. Ng5 Bc8 18. a5 Ra7 19. Bf3 Nc2 20. Qxc2 Qxg5 21. Be4 g6 22. Ra3 f5 23. exf6 Qxf6 24. Rf3 Qxd4 25. Bxd5 cxd5 26. Rxf8+ Kxf8 27. Nxe6+ Bxe6 28. Rxe6 Re7 29. Rxe7 Kxe7 30. g3 Qe4 31. Qd2 d4 32. Qg5+ Kf7 33. Qh6 Kg8 34. Qg5 d3 35. Qd8+ Kf7 36. Qc7+ Kf6 37. Qd8+ Kf5 38. Qd7+ Qe6 39. g4+ Kf6 40. Qd4+ Kg5 41. f3 h5 42. gxh5 gxh5 43. h4+ Kf5 44. Qc5+ Kf4 45. Qd4+ Kxf3 46. Qf2+ Ke4 47. Qg2+ Kd4 48. Qg7+ Qe5 49. Qd7+ Kc5 50. Qf7 d2 51. Qf8+ Qd6 52. Qc8+ Kb4 0-1

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.28"]
[Round "3"]
[White "Paprocki, Jaroslaw"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2184"]
[BlackElo "1782"]
[PlyCount "79"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 e5 6. Nf3 0-0 7. d5 Nh5 8. Bg5 f6 9. Be3 f5 10. exf5 gxf5 11. Nxe5 Qe8 12. Nd3 f4 13. Be2 Ng3 14. fxg3 Qxe3 15. gxf4 Qg3+ 16. Kd2 Re8 17. Bf3 Bf5 18. Ne2 Qg6 19. Qb3 Na6 20. Rae1 Qf6 21. Nec1 Bxd3 22. Nxd3 Nc5 23. Nxc5 Qxf4+ 24. Kc2 dxc5 25. Kb1 Qd2 26. Re6 Reb8 27. Rd1 Qf4 28. a3 b5 29. cxb5 c4 30. Qb4 a6 31. b6 Kh8 32. b7 Ra7 33. Re8+ Rxe8 34. b8Q Ra8 35. Q8b7 c5 36. Qd2 Qf5+ 37. Ka2 Rab8 38. Qc6 Qe5 39. Rb1 c3 40. Qxc3 1-0

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.27"]
[Round "2"]
[White "Czechowski, Jakub"]
[Black "Lewtak, Dominik"]
[Result "0-1"]
[ECO "D52"]
[WhiteElo "1782"]
[BlackElo "2118"]
[PlyCount "100"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 e6 5. e3 Nbd7 6. Nf3 Bd6 7. Bd3 0-0 8. 0-0 Re8 9. Qc2 h6 10. Bh4 dxc4 11. Bxc4 Qb6 12. Rfd1 Qb4 13. Be2 e5 14. a3 Qa5 15. Bg3 exd4 16. Bxd6 dxc3 17. b4 Qh5 18. Ne5 Qg5 19. f4 Qh4 20. Nf3 Qh5 21. Ne5 Qh4 22. Nf3 Qh5 23. h3 Nd5 24. Ne5 Qh4 25. Bc4 Nxe5 26. Bxd5 cxd5 27. Bxe5 Qg3 28. Kh1 f6 29. Bd4 Be6 30. Qxc3 Bf5 31. Qe1 Qg6 32. Rac1 Be4 33. Qf2 a5 34. b5 Rac8 35. Kh2 Rc4 36. Rxc4 dxc4 37. Bc3 Qf5 38. Bxa5 Qxb5 39. Bb4 Qa4 40. Qd2 Bd3 41. Re1 Qc6 42. Qb2 Rd8 43. Rd1 Qa4 44. Re1 Be4 45. Bc3 Rd3 46. Re2 Kh7 47. Kg3 Qd1 48. Re1 Qb3 49. Qxb3 cxb3 50. Rc1 Rxc3 0-1

[Event "Bialystok Zamenhof Memorial-B 36th"]
[Site "Bialystok"]
[Date "2017.12.27"]
[Round "1"]
[White "Obuhov, Filipp"]
[Black "Czechowski, Jakub"]
[Result "0-1"]
[ECO "E72"]
[WhiteElo "2103"]
[BlackElo "1782"]
[PlyCount "62"]
[EventDate "2017.12.27"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Nc3 c6 4. Bg2 Bg7 5. e4 e5 6. Nge2 0-0 7. 0-0 d6 8. d4 Nbd7 9. d5 Nb6 10. dxc6 bxc6 11. b3 Qc7 12. Bb2 Rd8 13. Rc1 Rb8 14. Rc2 Be6 15. f4 Ng4 16. Bc1 f5 17. Kh1 fxe4 18. Bxe4 d5 19. cxd5 cxd5 20. Bf3 Bf5 21. Bxg4 Bxg4 22. Na4 Qe7 23. Nxb6 Rxb6 24. Qe1 Bf5 25. Rd2 exf4 26. gxf4 Qe4+ 27. Kg1 Bh3 28. Rf2 Bc3 29. Bb2 Bxd2 30. Qxd2 Rc6 31. Nd4 Qb1+ 0-1

[Event "POL-chT U20"]
[Site "Szczyrk"]
[Date "2017.07.26"]
[Round "5.4"]
[White "Fiedorek, Michal"]
[Black "Czechowski, Jakub"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1871"]
[BlackElo "1724"]
[PlyCount "103"]
[EventDate "2017.07.22"]
[EventType "team-tourn"]
[EventRounds "9"]
[EventCountry "POL"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 0-0 6. 0-0 d6 7. Re1 Bb6 8. Bb3 Re8 9. Nbd2 Be6 10. Bxe6 fxe6 11. Nc4 Qd7 12. a4 Ng4 13. d4 exd4 14. cxd4 e5 15. h3 Nf6 16. Qb3 Kh8 17. dxe5 Nxe5 18. Nfxe5 dxe5 19. Be3 Bd4 20. Bxd4 Qxd4 21. Rad1 Qc5 22. Qc3 Rad8 23. Rxd8 Rxd8 24. Nxe5 Qxc3 25. bxc3 Rd2 26. Nf3 Ra2 27. e5 Ne8 28. Rd1 Kg8 29. Rd4 c5 30. Rd7 Rxa4 31. Rxb7 Rc4 32. Rxa7 Rxc3 33. Kf1 Rc1+ 34. Ke2 c4 35. Nd4 Rg1 36. g3 g5 37. Ra4 Rh1 38. Rxc4 Rxh3 39. Nf3 h6 40. Rc6 Rh5 41. Nd4 g4 42. e6 Re5+ 43. Kd3 Ng7 44. Kc4 Kf8 45. Rc5 Re4 46. Rc8+ Ke7 47. Kd5 Re1 48. Nc6+ Kf6 49. Rf8+ Kg6 50. Ne5+ Kh5 51. e7 Re2 52. Rf5+ 1-0

