[Event "GER-chT U16"]
[Site "Magdeburg"]
[Date "2023.12.30"]
[Round "7.7"]
[White "Seymer, Adam"]
[Black "Borgstaedt, Leif Jona"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "1694"]
[BlackElo "1442"]
[PlyCount "110"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB03_2024"]
[SourceDate "2024.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.17"]
[SourceQuality "1"]
[WhiteTeam "Dresden Gruen Weiss"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bf5 7. 0-0 Be7 8. Re1 0-0 9. c4 Nc6 10. cxd5 Qxd5 11. Bxe4 Bxe4 12. Nc3 Bxf3 13. Nxd5 Bxd1 14. Nxe7+ Nxe7 15. Rxd1 Nd5 16. Bg5 f6 17. Bh4 Rfe8 18. Re1 Nb4 19. f3 Kf7 20. Rac1 c6 21. a3 Nd5 22. Bg3 Rad8 23. Re4 Ne7 24. Rce1 Nf5 25. Bf2 a6 26. g4 Nd6 27. R4e2 Rxe2 28. Rxe2 Nb5 29. Rd2 Rd7 30. Be3 Ke6 31. Kf2 Kd5 32. a4 Nd6 33. b3 b6 34. h4 Nb7 35. Kg3 g6 36. Bf4 Re7 37. g5 f5 38. Be5 Nd6 39. Kf4 b5 40. Rc2 Nb7 41. axb5 axb5 42. b4 Rf7 43. Ke3 Re7 44. Kd3 Rf7 45. Bf6 Kd6 46. Re2 Kc7 47. Re8 Nd6 48. Re1 Kd7 49. f4 Ne4 50. Be5 Ke6 51. Rc1 Kd5 52. Ra1 Rd7 53. Ra8 Nf2+ 54. Ke2 Ne4 55. Kd3 Nf2+ 1/2-1/2

[Event "GER-chT U16"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "6.9"]
[White "Borgstaedt, Leif Jona"]
[Black "Buerger, Theodor"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1442"]
[BlackElo "1514"]
[PlyCount "68"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB03_2024"]
[SourceDate "2024.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.17"]
[SourceQuality "1"]
[WhiteTeam "Bielefeld"]
[BlackTeam "Regensburg Bavaria"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nd2 Bd6 5. Bg3 0-0 6. Ngf3 b6 7. Bd3 Bb7 8. Qe2 c5 9. c3 Nc6 10. e4 dxe4 11. Nxe4 Nxe4 12. Bxe4 Na5 13. Rd1 Qe7 14. Bh4 Qe8 15. dxc5 Bxe4 16. Qxe4 f5 17. Qe2 Bc7 18. b4 Nb7 19. cxb6 axb6 20. 0-0 e5 21. Rfe1 e4 22. Nd4 h6 23. f3 Qh5 24. Qc4+ Rf7 25. Bg3 f4 26. Bxf4 Bxf4 27. g3 exf3 28. Nxf3 Qxf3 29. Rd3 Qg4 30. Re4 Nd6 31. Rxf4 Nxc4 32. Rxg4 Ne5 33. Rgd4 Nxd3 34. Rxd3 Rxa2 0-1

[Event "GER-chT U16"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "5.8"]
[White "Borgstaedt, Leif Jona"]
[Black "Geray, Idar"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1442"]
[BlackElo "1456"]
[PlyCount "63"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB03_2024"]
[SourceDate "2024.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.17"]
[SourceQuality "1"]
[WhiteTeam "Bielefeld"]
[BlackTeam "Bebenhausen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. Bg5 d5 3. Bxf6 gxf6 4. c4 dxc4 5. Nc3 c5 6. dxc5 Qxd1+ 7. Rxd1 e6 8. Ne4 f5 9. Nd6+ Bxd6 10. cxd6 Bd7 11. f3 Nc6 12. e4 fxe4 13. fxe4 b5 14. Nf3 f6 15. Be2 Kf7 16. 0-0 Rhg8 17. Rf2 Rab8 18. Rdf1 Rbf8 19. b3 Kg7 20. bxc4 bxc4 21. Bxc4 Na5 22. Bd3 Nb7 23. e5 f5 24. Rc2 Rc8 25. Rfc1 Rxc2 26. Rxc2 Rc8 27. Rxc8 Bxc8 28. Ba6 Nxd6 29. exd6 Bd7 30. Ne5 Be8 31. d7 Bxd7 32. Nxd7 1-0

[Event "GER-chT U16"]
[Site "Magdeburg"]
[Date "2023.12.28"]
[Round "4.8"]
[White "Pichl, Christoph"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1680"]
[BlackElo "1442"]
[PlyCount "76"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB03_2024"]
[SourceDate "2024.01.17"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.17"]
[SourceQuality "1"]
[WhiteTeam "Bad Homburg"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Nf3 Nf6 3. c3 c5 4. dxc5 e6 5. Be3 Ne4 6. b4 Bd7 7. g3 a5 8. Qb3 axb4 9. cxb4 Be7 10. Nc3 Bf6 11. Bd4 Nc6 12. Nb5 Nxd4 13. Nbxd4 Bxd4 14. Nxd4 Qf6 15. 0-0-0 Nxf2 16. Bg2 Nxh1 17. Bxh1 Ba4 18. Qa3 0-0 19. Nb3 Bxb3 20. Qxb3 Qa1+ 21. Kd2 Qxa2+ 22. Qxa2 Rxa2+ 23. Ke3 Rb2 24. Rd4 Ra8 25. Bf3 g6 26. g4 Ra4 27. Kf4 Rbxb4 28. Rxb4 Rxb4+ 29. Ke5 Kf8 30. Kd6 Rc4 31. h3 Ke8 32. Bh1 Kd8 33. Bf3 Rc2 34. h4 h6 35. e4 d4 36. e5 d3 37. g5 h5 38. c6 Rxc6+ 0-1

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "7.2"]
[White "Behr, Julian"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1623"]
[BlackElo "1376"]
[PlyCount "83"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Landskrone"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Nxe4 5. Nxe4 d5 6. Bd3 dxe4 7. Bxe4 Bg4 8. h3 Bxf3 9. Bxf3 Qd7 10. Qe2 Bd6 11. 0-0 0-0 12. d3 Nd4 13. Qd1 Qf5 14. Be4 Qf6 15. Bxb7 Rab8 16. Be4 Rb5 17. Qh5 g6 18. Qd1 Rc5 19. c3 Ne6 20. Be3 Ra5 21. b4 Ra6 22. Bb7 Ra3 23. Qc1 Ra4 24. Qc2 Rxb4 25. cxb4 Nf4 26. Bxf4 Qxf4 27. a3 e4 28. g3 exd3 29. Qxd3 Qg5 30. Bg2 Rd8 31. Qb3 Be5 32. Rad1 Qf6 33. Rxd8+ Qxd8 34. Rd1 Qe7 35. Qd5 Bf6 36. Qa8+ Kg7 37. Qxa7 Qe2 38. Rf1 Qd2 39. Qxc7 Bd4 40. Bd5 Bxf2+ 41. Rxf2 Qe1+ 42. Kg2 1-0

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "6.2"]
[White "Borgstaedt, Leif Jona"]
[Black "Kazimov, Alis"]
[Result "1-0"]
[ECO "A51"]
[WhiteElo "1376"]
[BlackElo "1341"]
[PlyCount "45"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Bielefeld"]
[BlackTeam "Koeln Porz II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e5 3. e3 exd4 4. exd4 Bb4+ 5. Bd2 Bxd2+ 6. Qxd2 0-0 7. Nf3 d5 8. Nc3 Re8+ 9. Be2 dxc4 10. 0-0 Be6 11. Rfe1 Nd5 12. Bxc4 Nxc3 13. Bxe6 Rxe6 14. Qxc3 Nd7 15. Rxe6 fxe6 16. Re1 c6 17. Rxe6 Nf6 18. Qc4 Nd5 19. Re1 Qf6 20. Rd1 Re8 21. Ne5 Qf4 22. g3 Qg4 23. Re1 1-0

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "4.2"]
[White "Borgstaedt, Leif Jona"]
[Black "Rudolph, Eva"]
[Result "0-1"]
[ECO "D08"]
[WhiteElo "1376"]
[BlackElo "1860"]
[PlyCount "172"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Bielefeld"]
[BlackTeam "Duesseldorf"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. e3 Bb4+ 6. Bd2 dxe3 7. fxe3 Bf5 8. Nc3 Nge7 9. a3 Bxc3 10. Bxc3 0-0 11. Be2 Ng6 12. 0-0 Be4 13. Nd4 Ngxe5 14. Nf5 Re8 15. Rf4 Ng6 16. Rf1 Nge5 17. Rf4 Ng6 18. Rf2 Nce5 19. Bh5 Qg5 20. Bxg6 hxg6 21. Ng3 Bc6 22. Bxe5 Qxe5 23. e4 Rad8 24. Qf3 Rd7 25. Raf1 Qe6 26. b3 Bxe4 27. Nxe4 Qxe4 28. Qxe4 Rxe4 29. Rf3 f6 30. h3 Kf7 31. g4 Red4 32. g5 f5 33. Rc3 Rd3 34. Rf3 Rxc3 35. Rxc3 Rd1+ 36. Kg2 Ra1 37. a4 Rd1 38. Rf3 Re1 39. Kf2 Re4 40. Kg3 Ke6 41. Rd3 c5 42. Kf3 Rd4 43. Re3+ Kd7 44. Ke2 b6 45. Kf3 Kd6 46. Kg3 Re4 47. Rd3+ Rd4 48. Rc3 Ke5 49. Kf3 Rf4+ 50. Kg3 Re4 51. Kf3 f4 52. Kf2 Kf5 53. h4 Kg4 54. Kg2 Kxh4 55. Kf3 Re3+ 56. Rxe3 fxe3 57. Kxe3 Kxg5 58. Kf3 Kf5 59. Kg3 g5 60. Kf3 g4+ 61. Kg3 g5 62. Kf2 Kf4 63. Kg2 g3 64. Kg1 Kf3 65. Kf1 g4 66. Kg1 Ke3 67. Kg2 Kd3 68. Kxg3 Kc3 69. Kxg4 Kxb3 70. Kf3 Kxc4 71. Ke3 Kb4 72. Kd3 Kxa4 73. Kc4 a5 74. Kc3 b5 75. Kb2 Kb4 76. Ka2 c4 77. Kb2 c3+ 78. Kb1 Kb3 79. Ka1 a4 80. Kb1 Kc4 81. Kc2 b4 82. Kb1 Kd3 83. Ka2 c2 84. Kb2 Kd2 85. Ka2 b3+ 86. Kb2 c1Q# 0-1

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "2.2"]
[White "Borgstaedt, Leif Jona"]
[Black "Schulz, Victor"]
[Result "1-0"]
[ECO "D06"]
[WhiteElo "1376"]
[BlackElo "1510"]
[PlyCount "61"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Bielefeld"]
[BlackTeam "Baden-Baden II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 Bf5 5. Bg5 e6 6. e3 Be7 7. Be2 dxc4 8. Bxc4 0-0 9. 0-0 Nbd7 10. Re1 Ne4 11. Bxe7 Qxe7 12. Nxe4 Bxe4 13. Bd3 Bxd3 14. Qxd3 Nf6 15. e4 Rfd8 16. e5 Nd5 17. Re4 f5 18. Rh4 g5 19. Rh3 Nf4 20. Qe3 Nxh3+ 21. gxh3 h6 22. Kh1 Kf7 23. h4 Rg8 24. Rg1 g4 25. Qxh6 Rh8 26. Ng5+ Kg8 27. Qg6+ Kf8 28. Nxe6+ Qxe6 29. Qxe6 Rxh4 30. Qxf5+ Ke7 31. Qg5+ 1-0

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "5.2"]
[White "Gossing, Marie Sophie"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1269"]
[BlackElo "1376"]
[PlyCount "45"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Luebeck"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Nxe4 5. Nxe4 d5 6. Bxd5 Qxd5 7. Nc3 Qd8 8. 0-0 Bg4 9. h3 Bh5 10. g4 Bg6 11. Re1 Bd6 12. d4 f6 13. dxe5 Nxe5 14. Bf4 0-0 15. Bxe5 Bxe5 16. Nxe5 fxe5 17. Rxe5 Qf6 18. Qd5+ Bf7 19. Qe4 Bg6 20. Qe2 Bxc2 21. Rf1 Bg6 22. Nd5 Rad8 23. Nxf6+ 1-0

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "1.2"]
[White "Klugstedt, Vincent C"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "D13"]
[WhiteElo "1928"]
[BlackElo "1376"]
[PlyCount "89"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Bochum SG"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bf4 e6 7. e3 Bb4 8. Bd3 0-0 9. 0-0 Bd7 10. Qc2 h6 11. a3 Ba5 12. Rac1 Bc7 13. Bxc7 Qxc7 14. Nb5 Qd8 15. b4 a6 16. Nc3 Rc8 17. Qb3 Qe7 18. Na4 Qd8 19. Rc2 Na7 20. Rxc8 Qxc8 21. Ne5 Bb5 22. Nc5 b6 23. Na4 Bxd3 24. Qxd3 b5 25. Nc5 Nc6 26. Nxc6 Qxc6 27. Rc1 Rc8 28. Qc3 Nd7 29. Kf1 a5 30. g3 axb4 31. axb4 e5 32. dxe5 Nxc5 33. Qxc5 Qxc5 34. bxc5 Kf8 35. Ke2 Ke7 36. Kd3 Kd7 37. Kd4 Kc6 38. Ra1 b4 39. Ra6+ Kb5 40. Rb6+ Ka4 41. Kxd5 b3 42. Kc4 Ka5 43. Rxb3 Ka4 44. Rb7 Rf8 45. Ra7# 1-0

[Event "GER-chT Christmas U16 Lasker"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "3.2"]
[White "Schulz, Hannah"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C24"]
[WhiteElo "1539"]
[BlackElo "1376"]
[PlyCount "115"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Karlsruhe II"]
[BlackTeam "Bielefeld"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nf6 3. Bc4 Be7 4. Nxe5 0-0 5. d3 d6 6. Nf3 Bg4 7. 0-0 Nc6 8. c3 Re8 9. Re1 a6 10. a4 Ne5 11. Qb3 Bxf3 12. gxf3 Rf8 13. Nd2 Nxc4 14. Qxc4 b6 15. Nf1 Nh5 16. Ng3 g6 17. Nxh5 gxh5 18. Bh6 Re8 19. Kh1 Bf8 20. Rg1+ Kh8 21. Qd4+ f6 22. Bg5 Bg7 23. Bh4 c5 24. Qd5 Qe7 25. Qxh5 Qe5 26. Qxe5 Rxe5 27. Rg2 Rh5 28. Bg3 Rg8 29. Bxd6 Bf8 30. Rxg8+ Kxg8 31. Bxf8 Kxf8 32. Rg1 Rh6 33. Rg3 Kf7 34. Kg2 Ke6 35. f4 Rh4 36. f5+ Kf7 37. h3 Rh5 38. Rg4 h6 39. f4 a5 40. Kg3 Kf8 41. Rg6 Kf7 42. Kg4 Rg5+ 43. fxg5 hxg5 44. h4 gxh4 45. Kxh4 Ke7 46. Kh5 Kf7 47. Kh6 Ke7 48. Kg7 Kd6 49. Rxf6+ Kd7 50. Rxb6 Kd8 51. Rb5 Kc8 52. Rxc5+ Kb8 53. Rxa5 Kb7 54. Kf6 Kc7 55. Ra6 Kd8 56. Ra7 Ke8 57. e5 Kf8 58. Ra8# 1-0

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "6"]
[White "Bartels, Sebastian"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1620"]
[BlackElo "1319"]
[PlyCount "44"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d3 Bb4 5. Bd2 d6 6. Be2 Bg4 7. 0-0 0-0 8. a3 Ba5 9. Nd5 Bxd2 10. Qxd2 Nxd5 11. exd5 Ne7 12. c4 c6 13. dxc6 bxc6 14. Nh4 Bxe2 15. Qxe2 Ng6 16. Nf5 Qf6 17. Qf3 Nf4 18. Ne3 Rac8 19. Rfd1 Qg5 20. d4 Rfe8 21. d5 e4 22. Qg3 Ne2+ 0-1

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "3"]
[White "Borgstaedt, Leif Jona"]
[Black "Fellberg, Justus"]
[Result "0-1"]
[ECO "D50"]
[WhiteElo "1337"]
[BlackElo "1596"]
[PlyCount "76"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 dxc4 5. e4 Be7 6. Bxc4 c6 7. Nf3 h6 8. Bh4 0-0 9. 0-0 g5 10. Bg3 Nh5 11. Qd3 Nxg3 12. hxg3 b5 13. Bb3 a5 14. Bc2 a4 15. e5 f5 16. g4 Rf7 17. Nh2 Kf8 18. Qh3 Rh7 19. Qh5 Qe8 20. Qh3 Bb4 21. gxf5 exf5 22. Bxf5 Bxf5 23. Qxf5+ Rf7 24. Qg6 Rg7 25. Qxh6 Qg6 26. Qh8+ Rg8 27. Qf6+ Qxf6 28. exf6 Kf7 29. Ng4 Nd7 30. Ne4 Rae8 31. f4 Rxe4 32. Ne5+ Nxe5 33. dxe5 Bc5+ 34. Kh2 gxf4 35. Kh3 f3 36. Rxf3 Reg4 37. b4 R4g6 38. bxc5 Rh6# 0-1

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "8"]
[White "Borgstaedt, Leif Jona"]
[Black "Hoffmann, Alexander3333"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1360"]
[BlackElo "1620"]
[PlyCount "96"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c3 Nf6 3. Nf3 e6 4. c4 Bb4+ 5. Nc3 0-0 6. Bg5 b6 7. Qc2 Bb7 8. e3 Nbd7 9. a3 Be7 10. Be2 dxc4 11. Bxc4 c5 12. Be2 Rc8 13. Rd1 cxd4 14. exd4 Ne4 15. Bxe7 Qxe7 16. 0-0 Ndf6 17. Ne5 Rc7 18. Bf3 Nxc3 19. bxc3 Bxf3 20. Nxf3 Rfc8 21. Rd3 Qxa3 22. Re3 Rxc3 23. Rxc3 Qxc3 24. Qd1 a5 25. Ne5 a4 26. Qxa4 Nd5 27. Qd7 h6 28. Qxf7+ Kh8 29. Ng6+ Kh7 30. Nf8+ Kh8 31. Ng6+ Kh7 32. Ne5 b5 33. Qg6+ Kg8 34. Qf7+ Kh8 35. Ng6+ Kh7 36. Nf8+ Kh8 37. Ng6+ Kh7 38. Ne5 b4 39. Qxe6 Nf4 40. Qf5+ Kh8 41. Qxf4 b3 42. Nf7+ Kg8 43. Nd6 Rb8 44. Ne4 Qc8 45. Qc1 b2 46. Qb1 Qc4 47. Rd1 Qb3 48. Nc5 Qa3 0-1

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "1"]
[White "Borgstaedt, Leif Jona"]
[Black "Popovici, Daniel"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "1376"]
[BlackElo "1569"]
[PlyCount "116"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 e6 4. Nf3 Nf6 5. Bg5 Nbd7 6. e3 Be7 7. Qc2 a6 8. Be2 dxc4 9. Bxc4 b5 10. Bb3 Bb7 11. a3 Rc8 12. 0-0 0-0 13. Rab1 c5 14. Qd2 h6 15. Bxf6 Nxf6 16. Ne5 Qc7 17. Rfd1 Rfd8 18. Qe2 Bd6 19. Bc2 Bxe5 20. dxe5 Qxe5 21. Rbc1 Nd5 22. Qd3 g6 23. Nxd5 Rxd5 24. Qe2 Rcd8 25. Rxd5 Rxd5 26. e4 Rd4 27. f3 Rd8 28. Bd3 Qd4+ 29. Kf1 Qxd3 30. Qxd3 Rxd3 31. Rxc5 Rd7 32. Rc2 Kf8 33. Ke2 Ke7 34. Kf2 Kd6 35. Ke2 Rc7 36. Rd2+ Kc5 37. Rc2+ Kb6 38. Rd2 Rc5 39. Rd6+ Rc6 40. Rd2 Bc8 41. Ke3 Bb7 42. Ke2 Ka5 43. Kf2 Ka4 44. Rd4+ Kb3 45. Rd2 Rc2 46. Ke3 Rxd2 47. Kxd2 Kxb2 48. Kd3 Kxa3 49. Kd4 b4 50. Kc5 b3 51. Kb6 b2 52. Kxb7 b1Q+ 53. Kxa6 Ka4 54. Ka7 Qb5 55. Ka8 Kb4 56. Ka7 Kc5 57. Ka8 Kc6 58. Ka7 Qb7# 0-1

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "7"]
[White "Buchinger, Alexis"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1599"]
[BlackElo "1377"]
[PlyCount "31"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Nxe4 5. Bxf7+ Kxf7 6. Nxe4 d5 7. Nc3 Be6 8. d4 e4 9. Ng5+ Ke7 10. Nxe6 Kxe6 11. Qg4+ Kd6 12. Nb5+ Ke7 13. Bg5+ Ke8 14. Bxd8 Rxd8 15. Nxc7+ Kf7 16. Qe6# 1-0

[Event "GER Pfingstopen U16"]
[Site "Playchess.com INT"]
[Date "2020.06.05"]
[Round "2"]
[White "Roos, Valentin"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "1559"]
[BlackElo "1356"]
[PlyCount "87"]
[EventDate "2020.06.05"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. d3 Bb4 5. Be2 d6 6. Bg5 Bg4 7. h3 Bh5 8. 0-0 h6 9. Bh4 Kf8 10. Nd5 Bc5 11. Nxf6 gxf6 12. Nh2 Bxe2 13. Qxe2 Ke7 14. Qf3 Kd7 15. Bxf6 Qe8 16. Bxh8 Qxh8 17. Ng4 Rf8 18. c3 Kc8 19. Qf5+ Kb8 20. Nf6 Ka8 21. b4 Bb6 22. a4 a6 23. b5 Ne7 24. Qd7 Qxf6 25. bxa6 bxa6 26. a5 Bc5 27. Qxc7 Rc8 28. Qd7 Qe6 29. Qxe6 fxe6 30. Kh1 Rf8 31. f3 Rg8 32. Rab1 Ng6 33. Kh2 Nf4 34. g3 Nxd3 35. Rbd1 Nb2 36. Rb1 Nc4 37. Rfd1 Ne3 38. Re1 Nc4 39. Rb3 Bf2 40. Re2 Bxg3+ 41. Kh1 Bf4 42. Rb4 Nd2 43. Rf2 Rg3 44. Rb2 1-0

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "2"]
[White "Borgstaedt, Leif Jona"]
[Black "Gkegkas, Michail"]
[Result "0-1"]
[ECO "D62"]
[WhiteElo "1620"]
[BlackElo "1635"]
[PlyCount "98"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. Nf3 b6 6. e3 Bb7 7. Qc2 Nbd7 8. Be2 c5 9. 0-0 0-0 10. cxd5 exd5 11. b3 Ne4 12. Nxe4 dxe4 13. Bxe7 Qxe7 14. Nd2 cxd4 15. exd4 Rac8 16. Qd1 Nf6 17. Nc4 Rfd8 18. f3 Nd5 19. fxe4 Qxe4 20. Bf3 Qe6 21. Bg4 Qg6 22. Bxc8 Rxc8 23. Qd2 Re8 24. Rae1 Rd8 25. Ne5 Qh5 26. Qe3 Nxe3 27. Rxe3 f6 28. Nf3 Bxf3 29. Rfxf3 Rxd4 30. Rf1 Rd1 31. Ree1 Rxe1 32. Rxe1 Qd5 33. Re8+ Kf7 34. Rb8 Qd4+ 35. Kf1 Qf4+ 36. Ke1 Qxb8 37. g3 Qe5+ 38. Kf2 Qb2+ 39. Kg1 Qxa2 40. h3 Qxb3 41. g4 a5 42. h4 a4 43. g5 fxg5 44. hxg5 a3 45. g6+ hxg6 46. Kf1 a2 47. Ke2 a1Q 48. Kd2 Qaa2+ 49. Ke1 Qbb1# 0-1

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "3"]
[White "Borgstaedt, Leif Jona"]
[Black "Schoen, Florian"]
[Result "1/2-1/2"]
[ECO "D06"]
[WhiteElo "1620"]
[BlackElo "1619"]
[PlyCount "112"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nb6 5. Nf3 Bg4 6. Be2 e6 7. Nc3 c5 8. Be3 N8d7 9. h3 Bh5 10. 0-0 Be7 11. Re1 0-0 12. d5 exd5 13. Nxd5 Nxd5 14. Qxd5 Bxf3 15. Bxf3 Nf6 16. Qxd8 Rfxd8 17. Rac1 b6 18. e5 Nd5 19. Red1 Nxe3 20. fxe3 Rxd1+ 21. Rxd1 Rd8 22. Rxd8+ Bxd8 23. Bg4 Kf8 24. e6 fxe6 25. Bxe6 Bf6 26. b3 Ke7 27. Bc4 Kd6 28. Kf2 Ke5 29. Kf3 Bh4 30. Bg8 h6 31. g3 Bg5 32. h4 Bf6 33. a4 Be7 34. Bc4 Kf5 35. e4+ Ke5 36. h5 Bg5 37. g4 Kd4 38. Bd5 Kc3 39. Bc4 Kb4 40. e5 Kc3 41. e6 Kd4 42. Bb5 Ke5 43. Bc4 Kd4 44. Bb5 Ke5 45. Bc4 Kd6 46. Ke4 Bf6 47. Kf5 Ke7 48. Bb5 Kd6 49. Bc4 Ke7 50. Bb5 Kd6 51. Be8 Ke7 52. Bf7 a6 53. Ke4 b5 54. Kd3 bxa4 55. bxa4 a5 56. Kc4 Bd4 1/2-1/2

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "6"]
[White "Borgstaedt, Leif Jona"]
[Black "Speter, Ivan"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "1620"]
[BlackElo "1620"]
[PlyCount "96"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 Nf6 5. Bg5 Be7 6. e3 Nbd7 7. Qc2 b6 8. Be2 Bb7 9. 0-0 0-0 10. b3 Rc8 11. Rab1 Qc7 12. Bf4 Qd8 13. Ne5 Ne8 14. Bd3 f5 15. Rfd1 Ndf6 16. cxd5 cxd5 17. Qd2 Nd6 18. Nf3 Nde4 19. Bxe4 fxe4 20. Ne5 Bb4 21. Rbc1 Qe7 22. Qb2 Nh5 23. Bg3 Nxg3 24. hxg3 Qf6 25. Ne2 Qxf2+ 26. Kh1 Rxc1 27. Rxc1 Qxe3 28. Nf4 Qxg3 29. Nxe6 Qh4+ 30. Kg1 Re8 31. Nc7 Rc8 32. Nb5 Rxc1+ 33. Qxc1 Ba6 34. Nc7 Be1 35. Qc2 Qf4 36. Ne6 Qf1+ 37. Kh2 Qf2 38. Qxf2 Bxf2 39. Nc6 Bc8 40. Nc7 e3 41. Nb4 e2 42. Nd3 Bf5 43. Nxf2 e1Q 44. Nh3 Bxh3 45. Kxh3 Qe3+ 46. Kh2 Qxd4 47. Nb5 Qc5 48. Nxa7 Qc7+ 0-1

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "10"]
[White "Borgstaedt, Leif Jona"]
[Black "Vaghef, Mohammad Reza"]
[Result "0-1"]
[ECO "D85"]
[WhiteElo "1620"]
[BlackElo "1548"]
[PlyCount "136"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Bb2 cxd4 9. cxd4 Nc6 10. Bb5 Qa5+ 11. Qd2 Qxb5 12. Rb1 Bg4 13. d5 Bxb2 14. Rxb2 Qa6 15. dxc6 Qxc6 16. Ne5 Qxe4+ 17. Qe3 Qxe3+ 18. fxe3 Bf5 19. 0-0 f6 20. Nf3 0-0 21. Nd4 Bd3 22. Rd1 Ba6 23. Ne6 Rfc8 24. Rbd2 Kf7 25. Nf4 g5 26. Ne2 Rc6 27. Nd4 Rd6 28. Rc2 Rad8 29. Rcd2 e5 30. Nf3 Rxd2 31. Rxd2 Rxd2 32. Nxd2 Ke6 33. Kf2 Kd5 34. Kf3 f5 35. g4 e4+ 36. Kg3 fxg4 37. Kxg4 Bd3 38. Kxg5 Kc5 39. Kf6 Kb4 40. Kg7 Kc3 41. Nb3 b6 42. Kxh7 a5 43. Kg7 a4 44. Nd4 Kb2 45. h4 Kxa2 46. h5 Kb2 47. h6 a3 48. h7 a2 49. h8Q a1Q 50. Qh2+ Kc3 51. Qc7+ Bc4 52. Qxb6 Qg1+ 53. Kh6 Qxe3+ 54. Kh5 Qxd4 55. Qa5+ Kd3 56. Qa4 e3 57. Qa3+ Qc3 58. Qd6+ Kc2 59. Qg6+ Bd3 60. Qg2+ e2 61. Qf2 Qh8+ 62. Kg4 Qg7+ 63. Kh4 Qh6+ 64. Kg4 Qg6+ 65. Kh4 Qe4+ 66. Kg5 Kc3 67. Qf5 Qxf5+ 68. Kh4 e1Q# 0-1

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "5"]
[White "Grave, Lukas"]
[Black "Borgstaedt, Leif Jona"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "1343"]
[BlackElo "1620"]
[PlyCount "168"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3 Nf6 6. Nc3 Nc6 7. Bg5 Bg4 8. h3 Bh5 9. g4 Bg6 10. d4 d5 11. Bd3 Be7 12. Bxg6 fxg6 13. Qd2 0-0 14. 0-0-0 Nd7 15. Bxe7 Qxe7 16. Nxd5 Qd6 17. Nxc7 Qxc7 18. Ng5 Qd6 19. d5 Ne7 20. Ne4 Qf4 21. Qxf4 Rxf4 22. Nd6 b6 23. Nb5 Rxf2 24. d6 Nc6 25. Nd4 Nb4 26. Kb1 Rc8 27. c3 Nc6 28. Nb5 a6 29. Nd4 Nxd4 30. Rxd4 Rd8 31. Rhd1 Rf6 32. b4 Ne5 33. a4 Nf7 34. d7 Ne5 35. a5 bxa5 36. bxa5 Rf7 37. Rd6 Rdxd7 38. Rxd7 Rxd7 39. Re1 Rb7+ 40. Kc2 Nf3 41. Re8+ Kf7 42. Ra8 Ng5 43. Rxa6 Nxh3 44. Rd6 Ng5 45. c4 Ne4 46. Rd4 Nc5 47. Kc3 Ra7 48. Kb4 Nd7 49. c5 Rb7+ 50. Kc4 Rc7 51. Kb5 Rxc5+ 52. Kb4 Rc7 53. Kb5 Ke8 54. a6 Ra7 55. Ra4 Kd8 56. Kc6 Kc8 57. g5 Rc7+ 58. Kb5 Ra7 59. Kc6 Ne5+ 60. Kb6 Ra8 61. a7 Nd7+ 62. Kc6 Ne5+ 63. Kb6 Nd7+ 64. Kc6 Ne5+ 65. Kd5 Nf3 66. Ke6 Nxg5+ 67. Ke7 Nh3 68. Kf8 Kb7+ 69. Kxg7 Rxa7 70. Rb4+ Kc6+ 71. Kh6 Kc5 72. Rb3 Ra2 73. Rxh3 Kd5 74. Kxh7 Ke5 75. Kxg6 Kf4 76. Rh5 Ra6+ 77. Kg7 Kg4 78. Rd5 Kf4 79. Rd4+ Ke5 80. Rd2 Kf5 81. Rh2 Ra7+ 82. Kf8 Kf6 83. Rh6+ Kg5 84. Rc6 Kf5 1/2-1/2

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "4"]
[White "Haenselmann, Hendrik"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1182"]
[BlackElo "1620"]
[PlyCount "147"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. a3 d6 5. d4 Bg4 6. Bb5 a6 7. Bxc6+ bxc6 8. dxe5 Bxf3 9. Qxf3 dxe5 10. Bg5 Be7 11. Rd1 Qc8 12. 0-0 0-0 13. Rd2 Qe6 14. Rfd1 Rad8 15. Na4 Rxd2 16. Rxd2 h6 17. Bxf6 Bxf6 18. Nc5 Qe7 19. Nd7 Re8 20. Rd3 Bg5 21. Qf5 g6 22. Qg4 Rd8 23. Nxe5 Rxd3 24. Nxd3 Bf6 25. Qc8+ Kg7 26. Qxa6 Qxe4 27. h3 Qd5 28. Qb7 Bd4 29. Qxc7 Qf5 30. a4 Bf6 31. a5 Bd4 32. a6 Qb5 33. a7 Qa6 34. Nb4 Qa1+ 35. Kh2 Qxa7 36. Qxa7 Bxa7 37. Nxc6 Bb6 38. b4 Bxf2 39. c4 Be1 40. b5 Bb4 41. b6 Bd6+ 42. g3 Kf8 43. b7 Ke8 44. b8Q+ Bxb8 45. Nxb8 Kd8 46. c5 Kc7 47. Na6+ Kc6 48. Kg2 Kb5 49. Nc7+ Kxc5 50. Kf3 Kd6 51. Nb5+ Ke6 52. Ke4 f5+ 53. Kd4 g5 54. Ke3 Ke5 55. Nd4 h5 56. Ne2 g4 57. hxg4 fxg4 58. Nf4 Kf5 59. Nxh5 Kg5 60. Nf4 Kf5 61. Nd5 Ke5 62. Nc3 Kf5 63. Kd4 Kg5 64. Ke5 Kh5 65. Kf5 Kh6 66. Kxg4 Kg7 67. Kg5 Kh8 68. Kf6 Kg8 69. g4 Kf8 70. g5 Kg8 71. g6 Kf8 72. g7+ Kg8 73. Nb1 Kh7 74. Kf7 1-0

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "8"]
[White "Kern, Leopold Xaver"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C30"]
[WhiteElo "1620"]
[BlackElo "1620"]
[PlyCount "81"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. f4 d6 3. Nf3 Nf6 4. Nc3 Nc6 5. Bc4 Bg4 6. 0-0 Nxe4 7. Bxf7+ Kxf7 8. Nxe4 Be7 9. b4 Rf8 10. b5 Nd4 11. Nxe5+ dxe5 12. Qxg4 Kg8 13. Bb2 Bc5 14. Kh1 b6 15. fxe5 Nxc2 16. Nxc5 Nxa1 17. Rxa1 bxc5 18. e6 g6 19. Re1 Qe7 20. Qe4 Rae8 21. Qe5 Qf6 22. Qxf6 Rxf6 23. Bxf6 Kf8 24. Kg1 Rc8 25. Re5 Re8 26. Kf2 Kg8 27. Ke3 h5 28. Kd3 Kh7 29. Kc4 Kh6 30. Bg5+ Kg7 31. Kxc5 Rf8 32. Kc6 Re8 33. Kd7 Rf8 34. e7 Rf7 35. Kd8 Rxe7 36. Rxe7+ Kh8 37. Bf6+ Kg8 38. Rxc7 Kf8 39. Rxa7 h4 40. Bxh4 g5 41. b6 1-0

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "11"]
[White "Kern, Ludwig Maria"]
[Black "Borgstaedt, Leif Jona"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "1487"]
[BlackElo "1620"]
[PlyCount "83"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Nxe4 5. Nxe4 d5 6. Bxd5 Qxd5 7. Nc3 Qd8 8. 0-0 Bg4 9. Re1 Bd6 10. h3 Bh5 11. g4 Bg6 12. d3 0-0 13. Be3 f5 14. Bg5 Qd7 15. Nh4 fxg4 16. Nxg6 hxg6 17. Qxg4 Qxg4+ 18. hxg4 Bc5 19. Be3 Nd4 20. Ne4 Bb6 21. Rac1 Nf3+ 22. Kf1 Nxe1 23. Kxe1 Bxe3 24. fxe3 Rf3 25. Ke2 Raf8 26. Rg1 R3f6 27. Nxf6+ gxf6 28. e4 Kg7 29. Ke3 g5 30. Rh1 Rh8 31. Rxh8 Kxh8 32. Kd2 Kg7 33. Kc3 Kf8 34. Kc4 Ke7 35. Kd5 c6+ 36. Kc5 Kd7 37. c4 b6+ 38. Kb4 Kd6 39. Kc3 Kc5 40. b4+ Kd6 41. a4 c5 42. b5 1/2-1/2

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "9"]
[White "Stein, Theodor"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "1395"]
[BlackElo "1620"]
[PlyCount "64"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 4. Bc4 Nxe4 5. Nxe4 d5 6. Bd3 dxe4 7. Bxe4 Bg4 8. 0-0 Nd4 9. d3 c6 10. c3 Nb5 11. h3 Bh5 12. Re1 Bd6 13. d4 0-0 14. dxe5 Bxf3 15. Qxf3 Bxe5 16. Bxh7+ Kxh7 17. Qh5+ Kg8 18. Rxe5 g6 19. Qg5 Qxg5 20. Bxg5 f6 21. Rxb5 cxb5 22. Be3 a6 23. Re1 Rfe8 24. Kf1 Rad8 25. Bb6 Rxe1+ 26. Kxe1 Rd6 27. Bc5 Re6+ 28. Kd2 Re5 29. Bd4 Rd5 30. Ke3 Kf7 31. b4 Rg5 32. g3 f5 0-1

[Event "GER Pfingstopen U25"]
[Site "Playchess.com INT"]
[Date "2020.06.02"]
[Round "1"]
[White "Traetmar, Mattis"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1888"]
[BlackElo "1620"]
[PlyCount "49"]
[EventDate "2020.06.02"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 197 Extra"]
[Source "ChessBase"]
[SourceDate "2020.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2020.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. d4 d6 4. dxe5 dxe5 5. Qxd8+ Kxd8 6. Nxe5 Be6 7. Bd3 Bd6 8. Nf3 Bc5 9. 0-0 Nc6 10. Nc3 Ke7 11. Bg5 Rhe8 12. e5 Nxe5 13. Nxe5 Kf8 14. Rfe1 Ng4 15. Nxg4 Bxg4 16. h3 Bh5 17. Ne4 Bb6 18. g4 Bg6 19. Rad1 h6 20. Bf4 c6 21. Nd6 Rxe1+ 22. Rxe1 Bc7 23. Bxg6 fxg6 24. Bg3 Rb8 25. Kg2 1-0

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.26"]
[Round "9"]
[White "Wellssow, Lio Keanu"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1004"]
[BlackElo "1175"]
[PlyCount "66"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Bg4 8. Qxe7+ Bxe7 9. Bxf6 Bxf6 10. Nbd2 0-0 11. Be2 Re8 12. Ne4 Nd7 13. 0-0 d5 14. Ng3 Rab8 15. Rfe1 Bxb2 16. Rab1 Bf6 17. Rb4 Bxf3 18. gxf3 Bc3 19. Reb1 Bxb4 20. Rxb4 Nb6 21. Rg4 Re6 22. Kf1 Rg6 23. Nf5 Rxg4 24. fxg4 Na4 25. Bf3 c6 26. h4 Nc3 27. a3 a5 28. g5 b5 29. Nd4 Rc8 30. h5 g6 31. h6 b4 32. Bg4 bxa3 33. Bxc8 a2 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.25"]
[Round "8"]
[White "Borgstaedt, Leif Jona"]
[Black "Werner, Florin"]
[Result "0-1"]
[ECO "D50"]
[WhiteElo "1175"]
[BlackElo "1085"]
[PlyCount "84"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. Bg5 c5 5. e3 h6 6. Bh4 g5 7. Bg3 Bg7 8. Nf3 Nc6 9. cxd5 exd5 10. Bb5 Bd7 11. 0-0 a6 12. Ba4 b5 13. Bc2 Be6 14. a3 c4 15. a4 b4 16. Ne2 b3 17. Bb1 a5 18. Nc3 Nh5 19. e4 Nxg3 20. fxg3 g4 21. exd5 Bxd5 22. Re1+ Kf8 23. Ne5 Nxe5 24. dxe5 Be6 25. Be4 Rb8 26. Bc6 Qc7 27. Bd5 h5 28. Bxe6 fxe6 29. Qd6+ Qxd6 30. exd6 Bxc3 31. bxc3 b2 32. Rab1 Kf7 33. Re4 Rhd8 34. Rxc4 Rxd6 35. Rc7+ Kg6 36. Ra7 Rd2 37. Rxa5 Rc2 38. Rxb2 Rc1+ 39. Kf2 Rxb2+ 40. Ke3 Rxc3+ 41. Kf4 Kf6 42. Re5 Rb4+ 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.24"]
[Round "7"]
[White "Hernando, Leonard"]
[Black "Borgstaedt, Leif Jona"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "1107"]
[BlackElo "1175"]
[PlyCount "102"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4 Nf6 6. d4 c6 7. Bf4 d5 8. Nc3 Bb4 9. Bd3 0-0 10. 0-0 Bg4 11. a3 Bd6 12. Be2 Bxf4 13. h3 Bh5 14. Nd2 Bxe2 15. Qxe2 Re8 16. Qd3 Bxd2 17. Qxd2 Nbd7 18. b3 Ne4 19. Nxe4 Rxe4 20. Qd3 Nf6 21. Rfd1 Qd7 22. Ra2 Rae8 23. Rad2 Qd6 24. Qf1 c5 25. cxd5 Qxd5 26. dxc5 Qxc5 27. a4 Qc7 28. Rc1 Qxc1 29. Qxc1 Re1+ 30. Qxe1 Rxe1+ 31. Kh2 h6 32. b4 Rb1 33. b5 Ra1 34. Rd4 Ra2 35. f3 a6 36. b6 Rb2 37. a5 Ra2 38. Rd8+ Kh7 39. Rb8 Rxa5 40. Rxb7 Rb5 41. Rb8 Kg6 42. b7 Nd7 43. Ra8 a5 44. g4 Kf6 45. Ra6+ Ke7 46. Kg3 Nc5 47. Rxa5 Rxb7 48. Rxc5 g5 49. Rf5 f6 50. h4 Kf7 51. h5 Kg7 1/2-1/2

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.23"]
[Round "6"]
[White "Borgstaedt, Leif Jona"]
[Black "Irrgang, Natascha"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1175"]
[BlackElo "1337"]
[PlyCount "92"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 0-0 5. Bg5 d6 6. e3 Nbd7 7. Be2 e5 8. 0-0 Re8 9. d5 c6 10. e4 Qb6 11. Rb1 Qc7 12. Qd2 a6 13. Rfd1 c5 14. b4 b6 15. bxc5 bxc5 16. h3 Bb7 17. Rb2 Rab8 18. Rdb1 Ba8 19. Rxb8 Rxb8 20. Rxb8+ Qxb8 21. Bd3 Bb7 22. Qb2 Qc7 23. Qd2 Nb6 24. Bxf6 Bxf6 25. a4 Bg7 26. Ng5 Qe7 27. a5 Nd7 28. Nf3 Qd8 29. Ne2 Bc8 30. Ng5 Bh6 31. Ne6 Qh4 32. g3 Bxd2 33. gxh4 fxe6 34. dxe6 Nf6 35. Ng3 Bxe6 36. Ne2 Bxa5 37. Nc1 Bb4 38. Nb3 a5 39. Nc1 Bxh3 40. Kh2 Bg4 41. Kg3 Bd1 42. f3 a4 43. Bb1 Bd2 44. Nd3 a3 45. Ba2 Nd7 46. Nf2 Be2 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.23"]
[Round "5"]
[White "Hornstein, Leonhard Orell"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "934"]
[BlackElo "1175"]
[PlyCount "114"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Bg5 Nbd7 8. Nc3 Qxe2+ 9. Bxe2 Be7 10. d4 0-0 11. 0-0-0 Re8 12. Rhe1 a5 13. Bc4 c6 14. d5 c5 15. Bb5 Kf8 16. Re2 h6 17. Bxf6 Bxf6 18. Rxe8+ Kxe8 19. Re1+ Kf8 20. Ne4 Be5 21. Bxd7 Bxd7 22. Nxe5 dxe5 23. Nxc5 Bf5 24. Rxe5 Rc8 25. Rxf5 Rxc5 26. Kd2 Ke7 27. Kd3 f6 28. Kd4 Rxc2 29. d6+ Kxd6 30. Rxa5 Rxb2 31. a4 Rxf2 32. Rd5+ Kc6 33. Rc5+ Kb6 34. Rb5+ Ka6 35. Kc5 Rf5+ 36. Kb4 Rxb5+ 37. axb5+ Kb6 38. Kc4 g5 39. Kd5 Kxb5 40. Ke6 Kc5 41. Kxf6 b5 42. Kg6 b4 43. Kxh6 b3 44. Kxg5 b2 45. h4 b1Q 46. h5 Qg1 47. h6 Qxg2+ 48. Kf5 Kd6 49. h7 Qc2+ 50. Kf6 Qxh7 51. Kg5 Qf7 52. Kg4 Ke5 53. Kg3 Ke4 54. Kg4 Qg7+ 55. Kh3 Kf4 56. Kh2 Kf3 57. Kh1 Qg2# 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.22"]
[Round "4"]
[White "Borgstaedt, Leif Jona"]
[Black "Haug, Mara"]
[Result "1-0"]
[ECO "D50"]
[WhiteElo "1175"]
[BlackElo "938"]
[PlyCount "43"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nc6 5. e3 Bd6 6. Qc2 Bb4 7. cxd5 exd5 8. Nf3 Bg4 9. Ne5 Qd6 10. Bxf6 Qxf6 11. Nxg4 Qg5 12. Ne5 Nxe5 13. dxe5 Qxe5 14. Qa4+ c6 15. Qxb4 a5 16. Qxb7 Rb8 17. Qxc6+ Ke7 18. Nxd5+ Kf8 19. Qc5+ Ke8 20. Bb5+ Kd8 21. 0-0 Qxb2 22. Qc7# 1-0

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.21"]
[Round "3"]
[White "Yang, Marco"]
[Black "Borgstaedt, Leif Jona"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1026"]
[BlackElo "1175"]
[PlyCount "65"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Qe2 Qe7 6. d3 Nf6 7. Nc3 Qxe2+ 8. Bxe2 Be7 9. Bg5 Bg4 10. Kd2 Nc6 11. h3 Bf5 12. Rab1 h6 13. Bxf6 Bxf6 14. Nd5 Bd8 15. Rhe1 0-0 16. Nh4 Bxh4 17. Nxc7 Rac8 18. Nb5 Bg5+ 19. Kd1 Rfd8 20. Bf3 a6 21. Nc3 Be6 22. Rc1 Bxc1 23. Kxc1 d5 24. Na4 Rb8 25. Nb6 Rd6 26. Kd2 Nd4 27. Na4 Nxf3+ 28. gxf3 d4 29. Nc5 Bxa2 30. b3 Rc6 31. Na4 Rbc8 32. Rc1 Bxb3 33. Nb2 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.20"]
[Round "2"]
[White "Borgstaedt, Leif Jona"]
[Black "Wilmink, Luca"]
[Result "0-1"]
[ECO "D53"]
[WhiteElo "1175"]
[BlackElo "995"]
[PlyCount "88"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 d5 3. Nc3 e6 4. Bg5 Be7 5. Qc2 Bd7 6. e3 Bc6 7. Nf3 Nbd7 8. Be2 Nb6 9. b3 Nfd7 10. Bxe7 Qxe7 11. c5 Nc8 12. b4 a6 13. 0-0 Na7 14. Nd2 Nb5 15. Nxb5 Bxb5 16. Bxb5 axb5 17. a4 0-0 18. a5 b6 19. a6 Ra7 20. g3 Rfa8 21. cxb6 Nxb6 22. Qc5 Qxc5 23. dxc5 Na4 24. e4 h6 25. exd5 exd5 26. Rfd1 Rxa6 27. Nb1 c6 28. Re1 Nxc5 29. Rxa6 Nxa6 30. Nc3 Nxb4 31. Nxb5 cxb5 32. Rb1 Ra4 33. h4 d4 34. Kf1 Kf8 35. Ke2 d3+ 36. Kf1 Ke7 37. f3 Ke6 38. Kf2 Kd5 39. Ke3 Kc4 40. Kd2 Ra2+ 41. Kd1 Rc2 42. g4 d2 43. g5 Kd3 44. f4 Na2 0-1

[Event "GER-ch U25-C"]
[Site "Willingen"]
[Date "2018.05.20"]
[Round "1"]
[White "Zinnikus, Elias"]
[Black "Borgstaedt, Leif Jona"]
[Result "1-0"]
[ECO "E33"]
[WhiteElo "944"]
[BlackElo "1175"]
[PlyCount "113"]
[EventDate "2018.05.19"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 184 Extra"]
[Source "ChessBase"]
[SourceDate "2018.06.28"]
[SourceVersion "1"]
[SourceVersionDate "2018.06.28"]
[SourceQuality "1"]

1. Nf3 d5 2. d4 Nc6 3. c4 e6 4. Nc3 Bb4 5. e3 Nf6 6. Qc2 Ne4 7. Bd3 Nxc3 8. bxc3 Bd6 9. c5 Be7 10. 0-0 b6 11. Ba3 bxc5 12. dxc5 g6 13. Rab1 Bd7 14. Bb5 Rb8 15. Qa4 Ne5 16. Bxd7+ Nxd7 17. Rxb8 Qxb8 18. c6 Nc5 19. Qa5 Qb6 20. Qxb6 axb6 21. Rd1 0-0 22. Ne5 Re8 23. Nd7 Ne4 24. Bxe7 Rxe7 25. Rc1 Nd6 26. Kf1 Re8 27. Nf6+ Kf8 28. Nxe8 Kxe8 29. Ke2 Kd8 30. Kd3 Kc8 31. a4 Kb8 32. Ra1 Nc4 33. e4 Na5 34. Kd4 Nxc6+ 35. Kd3 dxe4+ 36. Kxe4 f5+ 37. Kf4 Kc8 38. Re1 Kd7 39. Kg5 Ke7 40. Kh6 Kf6 41. Kxh7 Ne5 42. h4 Ng4 43. f3 Ne5 44. Rxe5 Kxe5 45. Kxg6 c5 46. h5 Kd5 47. h6 Kc4 48. h7 Kxc3 49. h8Q+ Kb4 50. Qb8 c4 51. Qxb6+ Kxa4 52. Qb2 f4 53. Kf6 e5 54. Kxe5 Ka5 55. Kd5 Ka4 56. Kxc4 Ka5 57. Qb5# 1-0

