[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.30"]
[Round "7.8"]
[White "Astner, Sebastian"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1881"]
[BlackElo "1831"]
[PlyCount "97"]
[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 "Ergolding"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. Nc3 d5 3. Bf4 Bf5 4. f3 e6 5. g4 Bg6 6. h4 h6 7. e3 Bd6 8. Nh3 Na6 9. Bd3 Bxd3 10. Qxd3 c6 11. 0-0-0 Qe7 12. g5 Nh5 13. Bxd6 Qxd6 14. gxh6 gxh6 15. Rdg1 0-0-0 16. Rg2 Nb4 17. Qd2 Rdg8 18. Rhg1 Qf8 19. a3 Na6 20. Qf2 Nc7 21. Ne2 Ne8 22. Nhf4 Nef6 23. Nxh5 Nxh5 24. e4 Nf6 25. e5 Nd7 26. f4 c5 27. c3 cxd4 28. cxd4 Kb8 29. f5 Rxg2 30. Rxg2 Rg8 31. f6 Nb6 32. Nc3 Kc8 33. Nb5 Nc4 34. Nxa7+ Kd7 35. Nb5 h5 36. Rxg8 Qxg8 37. b3 Nb6 38. Qc2 Na8 39. a4 b6 40. Kb2 Qh8 41. Na7 Qb8 42. Qc6+ Kd8 43. Nb5 Nc7 44. Qxc7+ Qxc7 45. Nxc7 Kxc7 46. b4 Kb7 47. Kc3 Ka6 48. Kd3 b5 49. a5 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "5.8"]
[White "Friedland, Manfred"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1770"]
[BlackElo "1831"]
[PlyCount "59"]
[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 "Chemnitz USG"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nc3 d6 3. d4 cxd4 4. Qxd4 Nc6 5. Qd2 g6 6. b3 Bh6 7. f4 Nf6 8. Bb2 0-0 9. 0-0-0 a5 10. a4 Bg4 11. Be2 Bxe2 12. Ngxe2 Rc8 13. Kb1 Qd7 14. h3 Rfd8 15. g4 Bg7 16. Ng3 Nb4 17. g5 Ne8 18. h4 Qc7 19. Nge2 d5 20. e5 f6 21. exf6 exf6 22. Nd4 fxg5 23. hxg5 Bxd4 24. Qxd4 Ng7 25. Rh2 Nf5 26. Qf6 Qc6 27. Nxd5 Nxd5 28. Qh8+ Kf7 29. Rxh7+ Ke6 30. Qe5# 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "6.7"]
[White "Jahrke, Jonas"]
[Black "Spaeth, Rene"]
[Result "1-0"]
[ECO "A12"]
[WhiteElo "1831"]
[BlackElo "1588"]
[PlyCount "59"]
[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 "Essen Katernberg"]
[BlackTeam "Biberach"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 Bf5 4. 0-0 e6 5. b3 Be7 6. Bb2 0-0 7. c4 c6 8. d3 h6 9. Nbd2 Nbd7 10. Rc1 Rc8 11. Rc2 Re8 12. Qa1 Bf8 13. Rfc1 a6 14. h3 Qe7 15. Ne5 Red8 16. Ndf3 Ne8 17. Kh2 f6 18. Nxd7 Qxd7 19. cxd5 exd5 20. Rd2 Bb4 21. Bc3 Bxc3 22. Qxc3 Qe7 23. e3 Nd6 24. a4 Kf8 25. Nd4 Bh7 26. Ne2 Kg8 27. Nf4 Nf7 28. Rdc2 Ng5 29. Bxd5+ cxd5 30. Qxc8 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.28"]
[Round "3.8"]
[White "Jahrke, Jonas"]
[Black "Dartmann Aubanell, Catriona"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "1831"]
[BlackElo "1856"]
[PlyCount "143"]
[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 "Essen Katernberg"]
[BlackTeam "Hemer"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Nf3 Nf6 3. g3 Bf5 4. c4 c6 5. Nc3 h6 6. Bg2 e6 7. Qb3 Qb6 8. Qxb6 axb6 9. Nd2 Bb4 10. f3 0-0 11. e4 Bg6 12. Kf2 Rd8 13. cxd5 exd5 14. e5 Ne8 15. Nb3 Bc2 16. Be3 c5 17. Rhc1 Bxb3 18. axb3 Rxa1 19. Rxa1 Nc6 20. Nb5 Na5 21. f4 Kf8 22. Rd1 Nxb3 23. dxc5 Bxc5 24. Rxd5 Rxd5 25. Bxd5 Bxe3+ 26. Kxe3 Na5 27. b4 Nc6 28. Bxc6 bxc6 29. Nd4 c5 30. bxc5 bxc5 31. Nb3 c4 32. Nc5 f6 33. Kd4 g5 34. Kxc4 gxf4 35. gxf4 fxe5 36. fxe5 Ke7 37. Kd5 Ng7 38. Ke4 Kf7 39. Nb3 h5 40. Nd4 Kg6 41. Kf4 Ne8 42. Ne6 Kf7 43. Kf5 Ke7 44. Nf4 h4 45. Ng6+ Kf7 46. Nxh4 Ng7+ 47. Ke4 Ne6 48. Nf3 Kg6 49. h3 Nc5+ 50. Kd5 Nd3 51. Kd6 Nf4 52. e6 Nh5 53. Kd7 Kf5 54. e7 Kf4 55. Ng1 Kg5 56. e8Q Nf6+ 57. Kd8 Nxe8 58. Kxe8 Kg6 59. Ke7 Kg7 60. Ke6 Kg6 61. Ke5 Kg5 62. Nf3+ Kg6 63. Kf4 Kh6 64. Kg4 Kg6 65. h4 Kh6 66. h5 Kg7 67. Kg5 Kh7 68. Ne5 Kg7 69. h6+ Kh7 70. Kh5 Kg8 71. Kg6 Kh8 72. Nf7+ 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.28"]
[Round "4.8"]
[White "Rabenstein, Jonathan"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1441"]
[BlackElo "1831"]
[PlyCount "47"]
[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 "Magdeburg USC"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. Bc4 Nc6 6. 0-0 e6 7. d3 Nge7 8. Qe1 0-0 9. Qh4 d5 10. Bb3 Na5 11. f5 gxf5 12. Bh6 Nxb3 13. axb3 f6 14. Qg3 Ng6 15. Bxg7 Kxg7 16. exf5 exf5 17. Nh4 Be6 18. Nxf5+ Kh8 19. Rae1 Qd7 20. Qd6 Bxf5 21. Qxd5 Qxd5 22. Nxd5 Bd7 23. Nxf6 Bc6 24. Re7 0-1

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.27"]
[Round "2.8"]
[White "Frank, Marek"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B91"]
[WhiteElo "1596"]
[BlackElo "1831"]
[PlyCount "47"]
[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 "Gera"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nde2 Be7 8. Bg2 0-0 9. 0-0 b5 10. Nd5 Nxd5 11. Qxd5 Ra7 12. a4 Be6 13. Qd2 bxa4 14. Rxa4 Nd7 15. Nc3 Nb6 16. Ra1 Qc7 17. Nd5 Bxd5 18. exd5 f5 19. b3 a5 20. Rxa5 Rxa5 21. Qxa5 Ra8 22. Qb5 Rb8 23. Be3 Bd8 24. Qe8# 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.27"]
[Round "1.7"]
[White "Jahrke, Jonas"]
[Black "Elstner, Florian"]
[Result "0-1"]
[ECO "E01"]
[WhiteElo "1831"]
[BlackElo "1815"]
[PlyCount "112"]
[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 "Essen Katernberg"]
[BlackTeam "Plauen Koenig"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Bd6 5. c4 c6 6. 0-0 0-0 7. Qc2 Nbd7 8. Nbd2 Re8 9. e4 dxe4 10. Nxe4 Nxe4 11. Qxe4 e5 12. dxe5 Nxe5 13. Nxe5 Bxe5 14. Qc2 Qf6 15. Re1 Bf5 16. Be4 Bxe4 17. Qxe4 Re6 18. Qc2 Rae8 19. Be3 Bd4 20. Qd2 Bxb2 21. Bg5 Qd4 22. Rxe6 Rxe6 23. Rb1 Qxd2 24. Bxd2 Bd4 25. Rxb7 Kf8 26. Bb4+ c5 27. Ba5 Re2 28. Rxa7 Rxf2 29. Kh1 Rc2 30. Bb6 g6 31. a4 Rxc4 32. a5 Rb4 33. Rc7 Rb5 34. Rc6 Rb1+ 35. Kg2 Ra1 36. Bc7 Ke7 37. Bb6 h5 38. Kf3 Kd7 39. Rc7+ Ke6 40. Ke4 f5+ 41. Kf4 Be5+ 42. Kg5 Bxc7 43. Bxc7 c4 44. Kxg6 c3 45. Kxh5 c2 46. Bf4 c1Q 47. Bxc1 Rxc1 48. h4 Kf6 49. Kh6 Ra1 50. h5 Rxa5 51. Kh7 Ra3 52. h6 Rxg3 53. Kh8 Rh3 54. h7 f4 55. Kg8 f3 56. h8R Rxh8+ 0-1

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.26"]
[Round "7.3"]
[White "Wehrle, Maximilian"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "1739"]
[BlackElo "1725"]
[PlyCount "51"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Brombach"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. g3 b6 5. Bg2 Bb7 6. 0-0 0-0 7. c4 c5 8. d3 e6 9. Qc2 d5 10. e3 Nc6 11. d4 dxc4 12. Qxc4 Qc8 13. Qc1 cxd4 14. Nxd4 Nxd4 15. Bxd4 Bxg2 16. Kxg2 Qb7+ 17. Kg1 Ne4 18. Bxg7 Kxg7 19. Qb2+ Kg8 20. Nd2 Nxd2 21. Qxd2 Rfd8 22. Qe2 Rd5 23. Rfd1 Rad8 24. Rxd5 Qxd5 25. Rc1 Qd2 26. Rc2 1/2-1/2

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.25"]
[Round "5.3"]
[White "Jahrke, Jonas"]
[Black "Kort, Felix"]
[Result "0-1"]
[ECO "A20"]
[WhiteElo "1725"]
[BlackElo "1858"]
[PlyCount "94"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Hamburger SK"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 e4 5. Nc3 d5 6. Bg5 Be7 7. e3 Nbd7 8. Nge2 h6 9. Bxf6 Nxf6 10. cxd5 cxd5 11. Qb3 g5 12. h4 Rg8 13. hxg5 hxg5 14. Kd2 Be6 15. Bh3 Qd7 16. Bxe6 fxe6 17. Qb5 Rc8 18. a3 Ng4 19. Rhf1 Rf8 20. Qxd7+ Kxd7 21. Nd1 Nh2 22. Ndc3 Nxf1+ 23. Rxf1 a6 24. Nc1 Bd6 25. Ke2 Ke7 26. N1a2 Rf7 27. Ke1 Rcf8 28. Ne2 b5 29. b4 a5 30. Rh1 axb4 31. Nxb4 Bxb4+ 32. axb4 Rxf2 33. Nf4 gxf4 34. Kxf2 fxg3+ 35. Ke2 Rf2+ 36. Ke1 Rb2 37. Rh7+ Kf6 38. Rh6+ Kg5 39. Rh8 Kg4 40. Rg8+ Kf3 41. Kd1 g2 42. Kc1 Rf2 43. Kd1 Rf1+ 44. Kd2 g1Q 45. Rc8 Rf2+ 46. Kc3 Qc1+ 47. Kb3 Qb2# 0-1

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.25"]
[Round "6.1"]
[White "Jahrke, Jonas"]
[Black "Schroeder, Lennart"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "1725"]
[BlackElo "2023"]
[PlyCount "92"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Muenster"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 d5 5. Bg2 0-0 6. 0-0 c5 7. c4 d4 8. b4 Re8 9. bxc5 e5 10. e3 Nc6 11. exd4 e4 12. Ne1 Nxd4 13. h3 Nd7 14. Nc3 Nxc5 15. Ba3 Qa5 16. Bxc5 Qxc5 17. Nxe4 Qa3 18. Rb1 Qxa2 19. Nd6 Re2 20. Ra1 Qxd2 21. Qxd2 Rxd2 22. Nxc8 Ne2+ 23. Kh2 Bxa1 24. Nf3 Ra2 25. Nd6 Bf6 26. Nxb7 Rc2 27. c5 a5 28. Ne1 Rc1 29. c6 a4 30. Nd3 Rxf1 31. Bxf1 a3 32. Nb4 Nc3 33. Bc4 Be7 34. Nc2 Rc8 35. Na5 Bd8 36. Ba6 Ra8 37. Nb7 Rxa6 38. Nxd8 Nd5 39. Nb7 a2 40. Na1 Rxc6 41. Na5 Rc1 42. N5b3 Rb1 43. Kg2 Nb4 44. Kf3 Nc2 45. Nxc2 Rxb3+ 46. Ke2 Rb2 0-1

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.24"]
[Round "4.5"]
[White "Alms, Frithjof"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1603"]
[BlackElo "1725"]
[PlyCount "70"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Eilendorf Arminia"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a4 e5 7. Nf3 Be7 8. Bc4 0-0 9. 0-0 Qc7 10. Bb3 h6 11. Be3 Bg4 12. Re1 Nbd7 13. a5 Nc5 14. Nd5 Nxd5 15. Bxd5 Nd7 16. c4 Kh8 17. Qd2 Bxf3 18. gxf3 f5 19. exf5 Kh7 20. Be6 Nc5 21. Bxc5 Qxc5 22. b4 Qc7 23. Kh1 Bg5 24. Qd3 Kh8 25. Rg1 Bf4 26. Rg2 Qe7 27. Qe4 Rab8 28. b5 Qd8 29. Qd5 Re8 30. b6 Qe7 31. Rd1 Red8 32. Rg4 Re8 33. Qxd6 Rbd8 34. Bd7 Qxd6 35. Rxd6 Re7 0-1

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.24"]
[Round "3.6"]
[White "Kovalchuk, Alexander1111"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "1411"]
[BlackElo "1725"]
[PlyCount "97"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Dresden TU"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 e5 5. Nf3 Nc6 6. e3 Bb4+ 7. Bd2 Bxd2+ 8. Qxd2 d5 9. cxd5 Qxd5 10. Nc3 Qxd2+ 11. Nxd2 Be6 12. Bc4 Ke7 13. Ke2 Rhd8 14. Bxe6 Kxe6 15. Rhd1 Rac8 16. Nb3 Rxd1 17. Rxd1 Nb4 18. e4 b6 19. f3 Nc6 20. Rd2 Rd8 21. Rxd8 Nxd8 22. Nd2 Nc6 23. Nc4 Nd7 24. Nd5 Nd4+ 25. Kd2 f6 26. Nc7+ Ke7 27. Ne3 Nf8 28. Ned5+ Kd7 29. Kd3 Ng6 30. Ke3 Ne7 31. Nxe7 Kxe7 32. Nd5+ Kd6 33. Kd3 f5 34. Nc3 f4 35. Nd5 h5 36. Nxf4 Nxf3 37. Nxh5 Ne1+ 38. Kd2 Nxg2 39. Nxg7 Nf4 40. h4 Ke7 41. Kc3 b5 42. Kb4 Nd3+ 43. Kxb5 Nf2 44. Nf5+ Ke6 45. Ng3 Kd6 46. Ka6 Kc5 47. h5 Kd4 48. h6 Ng4 49. h7 1-0

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.23"]
[Round "1.8"]
[White "Eichhorn, Mathilda Sophie"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "1327"]
[BlackElo "1725"]
[PlyCount "96"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Schott Jena"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Be3 Be6 9. 0-0 0-0 10. Bf3 Nbd7 11. Re1 b5 12. Bg5 h6 13. Bxf6 Nxf6 14. Nd2 Rc8 15. Nf1 Qd7 16. Ne3 b4 17. Ncd5 Bxd5 18. Nxd5 Nxd5 19. exd5 Qc7 20. Rc1 Bg5 21. Rb1 Qxc2 22. Re2 Qxd1+ 23. Rxd1 f5 24. g3 Rc5 25. Bg2 Rfc8 26. h4 Be7 27. Bh3 g6 28. b3 h5 29. f3 Rc1 30. Red2 Rxd1+ 31. Rxd1 Rc2 32. Ra1 Kg7 33. Bf1 a5 34. Bc4 Bd8 35. a4 Bb6+ 36. Kh1 Bf2 37. g4 hxg4 38. h5 gxh5 39. fxg4 fxg4 40. Rf1 Bc5 41. Rf5 Rxc4 42. bxc4 b3 43. Rf1 b2 44. Kg2 Be3 45. Rb1 Bc1 46. Kg3 e4 47. Kf2 e3+ 48. Ke2 Kf6 0-1

[Event "GER-chT U16"]
[Site "Kiel"]
[Date "2022.07.23"]
[Round "2.1"]
[White "Jahrke, Jonas"]
[Black "Roehr, Oliver"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "1725"]
[BlackElo "2088"]
[PlyCount "119"]
[EventDate "2022.07.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Berlin Mattnetz"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 f5 2. d4 Nf6 3. Bg5 e6 4. Nbd2 Be7 5. Bxf6 Bxf6 6. e4 0-0 7. Bd3 d5 8. exf5 exf5 9. 0-0 Nc6 10. c3 g5 11. Ne1 g4 12. f4 Be6 13. Bc2 h5 14. Nd3 Kg7 15. Re1 Bg8 16. Nf1 Ne7 17. Ng3 h4 18. Nh5+ Kh6 19. Nxf6 Rxf6 20. Ne5 Be6 21. Re3 Qg8 22. Qe1 Kh5 23. Rd1 Ng6 24. Nxg6 Qxg6 25. Re5 Re8 26. Rd3 Bd7 27. Rde3 Rxe5 28. Rxe5 c6 29. Bd1 Re6 30. h3 Rxe5 31. Qxe5 Kh6 32. Qh8+ Qh7 33. Qf6+ Qg6 34. Qxh4+ Kg7 35. Qe7+ Qf7 36. Qxf7+ Kxf7 37. hxg4 fxg4 38. Kf2 Kg6 39. Bc2+ Kh5 40. g3 Kh6 41. Ke3 Bc8 42. Bd3 Bd7 43. c4 dxc4 44. Bxc4 Kg6 45. b4 Kf6 46. d5 Ke7 47. Ke4 cxd5+ 48. Bxd5 b6 49. Ke5 a5 50. a3 Bb5 51. f5 Bd3 52. f6+ Ke8 53. Kf4 Be2 54. Be6 axb4 55. axb4 b5 56. Bxg4 Bc4 57. Ke5 Kf7 58. Bh5+ Kg8 59. Bf3 Kf8 60. g4 1-0

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.27"]
[Round "7"]
[White "Jahrke, Jonas"]
[Black "Habersetzer, Elyse"]
[Result "1/2-1/2"]
[ECO "C10"]
[WhiteElo "1837"]
[BlackElo "1602"]
[PlyCount "110"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Muenster"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 5. Nf3 Ngf6 6. Nxf6+ Nxf6 7. c3 Be7 8. Ne5 0-0 9. Bd3 c5 10. dxc5 Bxc5 11. 0-0 Qd5 12. Bf4 a6 13. Qe2 Bd6 14. Rfd1 Qc5 15. Bc2 Be7 16. Rd3 b5 17. Rh3 g6 18. Ng4 Nxg4 19. Qxg4 e5 20. Qf3 Bxh3 21. Be3 Bxg2 22. Kxg2 Qc7 23. h4 Rac8 24. h5 Qc6 25. Be4 Qf6 26. Qh3 Bc5 27. hxg6 fxg6 28. Bd5+ Kh8 29. Qxh7+ Kxh7 30. Rh1+ Qh4 31. Rxh4+ Kg7 32. Bh6+ Kf6 33. Bxf8 Rxf8 34. Rh3 Rd8 35. Rd3 a5 36. Kg3 Kg5 37. Kg2 Rf8 38. f3 Rd8 39. Kg3 Bd6 40. Be4 Bc7 41. Rxd8 Bxd8 42. a3 Be7 43. b4 axb4 44. cxb4 Bd6 45. Kf2 Bc7 46. Bd3 Bb6+ 47. Ke2 Bd4 48. Bxb5 Bb2 49. a4 Bc3 50. a5 Bxb4 51. a6 Bc5 52. Bd3 Bd4 53. Be4 Ba7 54. Kd3 Kf4 55. Kc4 g5 1/2-1/2

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.26"]
[Round "5"]
[White "Jahrke, Jonas"]
[Black "Sommer, Justus"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "1837"]
[BlackElo "1744"]
[PlyCount "114"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Luebeck"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 c6 4. b3 e6 5. Bb2 Bd6 6. c4 0-0 7. 0-0 Nbd7 8. Nc3 e5 9. cxd5 cxd5 10. Nb5 Bb8 11. Ba3 Re8 12. Nd6 Bxd6 13. Bxd6 Qb6 14. Ba3 e4 15. Ne1 Ne5 16. d4 Nc6 17. Bb2 Bg4 18. Nc2 h6 19. Ne3 Be6 20. h3 Rad8 21. Qd2 Qc7 22. Rfc1 Qd7 23. Kh2 Nh7 24. Ba3 Ng5 25. h4 Nh7 26. Rh1 Rc8 27. Rac1 Qd8 28. Bh3 Bxh3 29. Kxh3 Qf6 30. Rcd1 Qe6+ 31. Kg2 Nf6 32. Rc1 Ng4 33. Rhd1 Rcd8 34. Rc3 Rd7 35. Rdc1 h5 36. b4 a6 37. Rb1 Qf6 38. Nxg4 hxg4 39. e3 Qf3+ 40. Kg1 Na7 41. Rc5 f6 42. Qd1 Qf5 43. Rbc1 g5 44. hxg5 Qxg5 45. Qf1 Qf5 46. Bb2 Ree7 47. Qg2 Rh7 48. a4 Rh3 49. Rc7 Nc6 50. Rxd7 Qxd7 51. Bc3 Nd8 52. a5 Nf7 53. Kf1 Ng5 54. Ke2 Qb5+ 55. Kd1 Qd3+ 56. Bd2 Nf3 57. Rc2 Rh2 0-1

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.26"]
[Round "6"]
[White "Taras, Simon"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "A58"]
[WhiteElo "1690"]
[BlackElo "1837"]
[PlyCount "107"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Bebenhausen"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bg7 7. e4 0-0 8. Nf3 d6 9. Nd2 Nbd7 10. Nc4 Nb6 11. a4 Bxa6 12. Nxb6 Qxb6 13. Qc2 Bxf1 14. Kxf1 Rfb8 15. Nb5 Ne8 16. g3 Nc7 17. Nxc7 Qxc7 18. Kg2 Qb6 19. Ra2 Qb3 20. Qxb3 Rxb3 21. Re1 Rb4 22. a5 Rb5 23. Bd2 Rxb2 24. Rxb2 Bxb2 25. Rb1 Bf6 26. Bh6 Bg7 27. Bxg7 Kxg7 28. Ra1 g5 29. f4 Kg6 30. Kf3 f5 31. e5 g4+ 32. Ke3 Kf7 33. Kd3 Ke8 34. Kc4 Kd7 35. Kb5 Rb8+ 36. Kc4 Rb4+ 37. Kc3 Kc7 38. a6 Kb8 39. a7+ Ka8 40. exd6 exd6 41. Ra6 Rd4 42. Rxd6 Kxa7 43. Rh6 Rxd5 44. Kc4 Rd2 45. Kxc5 Kb7 46. Rxh7+ Kc8 47. Rh5 Kd7 48. Rxf5 Rxh2 49. Rg5 Ke6 50. Rxg4 Rh5+ 51. Kd4 Kf6 52. Ke4 Ra5 53. Rg8 Kf7 54. Rg5 1-0

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.25"]
[Round "3"]
[White "Boldt, Timo"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "1648"]
[BlackElo "1837"]
[PlyCount "65"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Kreuzberg"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 Nf6 2. Nc3 g6 3. e4 c5 4. g3 Nc6 5. Bg2 Bg7 6. Nge2 0-0 7. 0-0 Ne8 8. d3 Nc7 9. f4 Ne6 10. Rb1 Ned4 11. Nxd4 Nxd4 12. Ne2 Rb8 13. Be3 d6 14. Nxd4 Bxd4 15. Bxd4 cxd4 16. f5 Bd7 17. Rf4 Qa5 18. Rh4 Qe5 19. g4 b5 20. Qf3 bxc4 21. dxc4 g5 22. Rh3 f6 23. Qd3 Rfc8 24. b3 a5 25. Rd1 a4 26. Qxd4 Qxd4+ 27. Rxd4 Rc7 28. Rd1 Rcb7 29. e5 Rb6 30. c5 Rb4 31. cxd6 Rxg4 32. dxe7 Rb7 33. Rxd7 1-0

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.25"]
[Round "4"]
[White "Niemann, Leon Pascal"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B28"]
[WhiteElo "1838"]
[BlackElo "1837"]
[PlyCount "54"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Lehrte"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 a6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Nc3 Bb4 7. Bd3 Bxc3+ 8. bxc3 d5 9. exd5 Qxd5 10. f3 0-0 11. 0-0 Be6 12. Qe2 Nbd7 13. c4 Qc6 14. Re1 Rfe8 15. Bb2 Rac8 16. Bxe5 Nxe5 17. Qxe5 Bxc4 18. Qg5 Bxd3 19. cxd3 h6 20. Qf5 Qb6+ 21. d4 Qb4 22. Rxe8+ Rxe8 23. h3 Qc3 24. Rc1 Qe3+ 25. Kh2 Qe6 26. Qxe6 Rxe6 27. Rc8+ Re8 1/2-1/2

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.24"]
[Round "2"]
[White "Grunwald, Jonathan"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B91"]
[WhiteElo "1798"]
[BlackElo "1837"]
[PlyCount "159"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Biebertal"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nc3 a6 3. Nf3 d6 4. d4 cxd4 5. Nxd4 Nf6 6. g3 e5 7. Nde2 b5 8. Bg2 Be7 9. Nd5 Nxd5 10. Qxd5 Ra7 11. Be3 Bb7 12. Qd3 Ra8 13. Nc3 Nd7 14. 0-0 Nf6 15. Rad1 0-0 16. Bg5 Ne8 17. Bxe7 Qxe7 18. Nd5 Bxd5 19. Qxd5 Rc8 20. Rd2 Rc5 21. Qd3 Qe6 22. a4 Qc4 23. axb5 axb5 24. Qxc4 Rxc4 25. c3 Rc6 26. Rfd1 g6 27. Bf1 Rb6 28. Rd5 b4 29. Rb5 Rxb5 30. Bxb5 bxc3 31. bxc3 Nc7 32. Bf1 Rd8 33. c4 Ne6 34. Rd5 Kf8 35. f3 Ke7 36. Ra5 Rd7 37. Kf2 Rb7 38. Ra2 Nd4 39. f4 f6 40. fxe5 fxe5 41. Bg2 Kd7 42. Bh3+ Ke7 43. Bg4 h5 44. Be2 Rb4 45. Bf1 Rb3 46. Be2 Rc3 47. Bf1 Rf3+ 48. Kg1 Re3 49. Bg2 Rc3 50. Bf1 Nf3+ 51. Kg2 Ng5 52. Ra7+ Ke6 53. c5 Rc2+ 54. Kh1 Nf3 55. Bh3+ Kf6 56. Bg2 Rc1+ 57. Bf1 Rxf1+ 58. Kg2 Rd1 59. Kxf3 dxc5 60. Ra6+ Kf7 61. Rc6 Rc1 62. Ke3 Rc2 63. Kd3 Rxh2 64. Rxc5 Rh3 65. Rxe5 Rxg3+ 66. Ke2 Kf6 67. Ra5 h4 68. Kf2 Ke6 69. Rb5 g5 70. Rf5 g4 71. Rg5 Rf3+ 72. Ke2 Rg3 73. Kf2 Kf6 74. Rf5+ Kg6 75. Rf4 Kg7 76. Rf5 Kh6 77. Rf6+ Kg7 78. Rf5 Kg6 79. Rf4 Kg7 80. Rf5 1/2-1/2

[Event "GER-chT U20"]
[Site "Willingen"]
[Date "2021.06.24"]
[Round "1"]
[White "Jahrke, Jonas"]
[Black "Martin, Richard"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "1837"]
[BlackElo "1923"]
[PlyCount "40"]
[EventDate "2021.06.24"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Baden-Baden"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. 0-0 Bd6 5. b3 0-0 6. Bb2 Qe7 7. c4 c6 8. Nc3 Nbd7 9. e3 e5 10. Nh4 Nb6 11. cxd5 Nfxd5 12. d4 Nxc3 13. Bxc3 e4 14. Bh1 Nd5 15. Bb2 f5 16. Ng2 g5 17. Bc1 f4 18. Bd2 Bh3 19. Re1 Qf6 20. Qc1 fxg3 0-1

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.30"]
[Round "7.3"]
[White "Schubert, Nikita"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "A58"]
[WhiteElo "1914"]
[BlackElo "1833"]
[PlyCount "60"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Gera"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. Nd2 g6 5. e4 d6 6. cxb5 a6 7. bxa6 Bg7 8. Bb5+ Nbd7 9. Ne2 Bxa6 10. Bxa6 Rxa6 11. 0-0 0-0 12. Nc3 Nb6 13. Qe2 Qa8 14. Rb1 Nfd7 15. a3 Rb8 16. Nb5 Qb7 17. b3 Nxd5 18. exd5 Qxb5 19. Qxe7 Nf6 20. Ne4 Nxd5 21. Qh4 Re8 22. Ng5 h6 23. Nf3 Nc3 24. Rb2 Ne2+ 25. Rxe2 Qxe2 26. Bxh6 Bxh6 27. Qxh6 Rxa3 28. h4 Qxf1+ 29. Kh2 Qxf2 30. h5 Ra2 0-1

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.29"]
[Round "5.6"]
[White "Jahrke, Jonas"]
[Black "Hetzner, Hannes"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "1833"]
[BlackElo "2000"]
[PlyCount "42"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Erlangen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. Nf4 Nxd4 10. Qh5+ Ke7 11. Ng6+ hxg6 12. Qxh8 Nxe5 13. Bb1 Qc7 14. Kd1 Bd7 15. b3 Qc3 16. Qg8 Bb5 17. Re1 Kd7 18. f4 Rc8 19. Bxg6 Qxa1 20. Nb1 Qxa2 21. fxe5 Qxb3+ 0-1

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.28"]
[Round "3.5"]
[White "Hommer, Jeremy"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2104"]
[BlackElo "1833"]
[PlyCount "79"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Lueneburg Turm"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. Bf4 g6 3. Nc3 d5 4. e3 Bg7 5. h4 h5 6. Nf3 Bg4 7. Qd2 c6 8. Ne5 Nbd7 9. f3 Bf5 10. 0-0-0 b5 11. Nxc6 Qb6 12. Nb4 0-0 13. Ncxd5 Nxd5 14. Nxd5 Qe6 15. e4 Nb6 16. Nb4 Bxe4 17. fxe4 Qxe4 18. Bxb5 Qf5 19. Bd3 Qd7 20. c3 Rfc8 21. Nc2 Qa4 22. Kb1 Nd5 23. Be4 e6 24. g4 Rc6 25. Bxd5 exd5 26. gxh5 Ra6 27. Nb4 Re6 28. hxg6 fxg6 29. Rde1 Rb6 30. h5 a5 31. Nd3 Qb5 32. hxg6 a4 33. a3 Rf8 34. Bh6 Bxh6 35. Rxh6 Rb7 36. Reh1 Rh7 37. gxh7+ Kh8 38. Qe3 Rf5 39. Rb6 Qd7 40. Rb8+ 1-0

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.28"]
[Round "4.7"]
[White "Toval, David"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B28"]
[WhiteElo "1853"]
[BlackElo "1833"]
[PlyCount "40"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Muenster 32"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 a6 3. c3 d5 4. exd5 Qxd5 5. d4 e6 6. Bd3 Nf6 7. 0-0 Nc6 8. Bg5 Be7 9. dxc5 Qxc5 10. Nbd2 0-0 11. Nb3 Qb6 12. Qc2 h6 13. Bh4 Nd5 14. Bg3 Bd7 15. a4 Rac8 16. a5 Qa7 17. Qe2 Rfd8 18. Nfd2 Be8 19. Nc4 Nb8 20. Be4 Bb5 1/2-1/2

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.27"]
[Round "2.9"]
[White "Jahrke, Jonas"]
[Black "Kittel, Lennart"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "1833"]
[BlackElo "1493"]
[PlyCount "65"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Goeppingen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. 0-0 c5 5. c4 d4 6. b4 cxb4 7. a3 b3 8. Qxb3 Nc6 9. d3 e5 10. Nbd2 Be7 11. a4 0-0 12. Ba3 Re8 13. Bxe7 Qxe7 14. Qb2 Bf5 15. Rfb1 Rab8 16. Nh4 Bd7 17. Qa3 Na5 18. Qxe7 Rxe7 19. Nb3 Nxb3 20. Rxb3 Bc8 21. Rab1 Rc7 22. Nf3 Rc5 23. Rb5 Nd7 24. Rxc5 Nxc5 25. Nxe5 Nxa4 26. Nc6 Ra8 27. Nxd4 Nc5 28. Rb5 Ne6 29. Nxe6 fxe6 30. Bxb7 Bxb7 31. Rxb7 Kf8 32. Kf1 a5 33. Ke1 1-0

[Event "GER-chT U14"]
[Site "Magdeburg"]
[Date "2019.12.27"]
[Round "1.2"]
[White "Zeuner, Ole"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "1794"]
[BlackElo "1833"]
[PlyCount "101"]
[EventDate "2019.12.27"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]
[WhiteTeam "Magdeburg Schachzwerge"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 Ngf6 5. Re1 e6 6. c3 a6 7. Bf1 Be7 8. d4 0-0 9. e5 dxe5 10. dxe5 Nd5 11. c4 Nb4 12. a3 Nc6 13. Nc3 Qc7 14. Bf4 Rd8 15. Qc2 Nd4 16. Qe4 Nf8 17. Rad1 Nxf3+ 18. Qxf3 Bd7 19. Bd3 Ng6 20. Bg3 Bc6 21. Be4 Rxd1 22. Rxd1 Bxe4 23. Qxe4 Rb8 24. h4 Qb6 25. h5 Qxb2 26. hxg6 Qxc3 27. gxh7+ Kh8 28. Bf4 Rd8 29. Rxd8+ Bxd8 30. Qxb7 Qa1+ 31. Kh2 Kxh7 32. Qxf7 Qd4 33. Qh5+ Kg8 34. Be3 Qd7 35. Bxc5 Be7 36. Bxe7 Qxe7 37. a4 Qd8 38. Qg4 Kf7 39. Qf3+ Kg8 40. Qc6 Qh4+ 41. Kg1 Qg4 42. g3 Qf5 43. Qa8+ Kh7 44. Qxa6 Qxe5 45. Qb5 Qe1+ 46. Kg2 Qe4+ 47. Kh2 Qe2 48. Qc5 e5 49. a5 Qa2 50. Kg2 e4 51. Qh5+ 1-0

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.19"]
[Round "7"]
[White "Berelowitsch, Dana"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "1760"]
[BlackElo "1875"]
[PlyCount "43"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c3 d5 4. exd5 Qxd5 5. d4 cxd4 6. cxd4 Nf6 7. Nc3 Qd6 8. Bd3 e6 9. 0-0 Be7 10. Ne5 Nbd7 11. Bf4 Qb6 12. Qd2 Qd8 13. Rfe1 Nb6 14. a4 Nbd5 15. Bg3 Nxc3 16. bxc3 Nh5 17. Kh1 Nxg3+ 18. fxg3 Bf6 19. Qf4 Qe7 20. Nc4 0-0 21. Nb6 Ra7 22. Qb8 1-0

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.18"]
[Round "6"]
[White "Jahrke, Jonas"]
[Black "Strack, Patrick"]
[Result "1/2-1/2"]
[ECO "A11"]
[WhiteElo "1875"]
[BlackElo "1705"]
[PlyCount "81"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 d5 6. c4 c6 7. 0-0 Na6 8. Nc3 Nc7 9. d3 Re8 10. Qc2 e5 11. Rfd1 Bd7 12. e3 Qc8 13. cxd5 Nfxd5 14. Ne4 Qb8 15. Ba3 Nb5 16. Bb2 Qc7 17. a4 Nd6 18. Nxd6 Qxd6 19. Ba3 Qc7 20. Rac1 Rad8 21. h3 h6 22. Nd2 Be6 23. Ne4 Nf6 24. Nc5 Bd5 25. e4 Be6 26. Nxe6 Rxe6 27. Qe2 Nd7 28. Qe3 Qb6 29. Qxb6 Nxb6 30. Kf1 Na8 31. h4 Nc7 32. Bh3 Ree8 33. Bc5 b6 34. Ba3 c5 35. b4 cxb4 36. Bxb4 Na6 37. Ba3 Bf8 38. Bxf8 Kxf8 39. a5 Nc5 40. axb6 axb6 41. Ke2 1/2-1/2

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.17"]
[Round "5"]
[White "Barth, Hans Joachim"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B28"]
[WhiteElo "1722"]
[BlackElo "1875"]
[PlyCount "92"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 a6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 e5 6. Nxc6 bxc6 7. Nc3 Nf6 8. Bd3 Bb4 9. 0-0 Bxc3 10. bxc3 d6 11. Qa4 Qc7 12. Bg5 Bd7 13. Rab1 c5 14. Qb3 h6 15. Bxf6 gxf6 16. Qb6 Qxb6 17. Rxb6 Ke7 18. Rfb1 Rhc8 19. Be2 Bc6 20. Bg4 Rc7 21. Bf5 Raa7 22. Kf1 Rcb7 23. Ke2 Kd8 24. Rxb7 Rxb7 25. Rxb7 Bxb7 26. Kd3 Bc6 27. g4 Ba4 28. Kd2 Kc7 29. Bh7 Bd7 30. f3 Be6 31. Kd3 Kb6 32. Bf5 Ka5 33. Bxe6 fxe6 34. Kc2 Kb6 35. Kb3 Kc6 36. h4 d5 37. exd5+ exd5 38. a4 a5 39. Kc2 d4 40. Kd3 Kd6 41. h5 Ke6 42. cxd4 exd4 43. Ke4 Kd6 44. f4 f5+ 45. gxf5 Ke7 46. Kd3 Kf7 0-1

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.16"]
[Round "4"]
[White "Jahrke, Jonas"]
[Black "Karbyshev, Aleksandr"]
[Result "1-0"]
[ECO "B96"]
[WhiteElo "1875"]
[BlackElo "1654"]
[PlyCount "125"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 h6 8. Bh4 Nbd7 9. Qf3 Qc7 10. 0-0-0 b5 11. Bd3 Bb7 12. Rhe1 b4 13. Nce2 d5 14. e5 Ne4 15. Nxe6 Qb6 16. N6d4 Ndc5 17. Bxe4 dxe4 18. Qg3 a5 19. Nf5 b3 20. axb3 a4 21. Nxg7+ Bxg7 22. Qxg7 Rf8 23. Qf6 Qxf6 24. Bxf6 axb3 25. Nc3 Rg8 26. g3 Rg6 27. Kb1 bxc2+ 28. Kxc2 Rc8 29. Kb1 Kf8 30. Re3 Bc6 31. Nd5 Rxf6 32. Nxf6 Ke7 33. Nd5+ Ke6 34. Nb6 Rc7 35. Rd6+ Kf5 36. h3 Ne6 37. Rc3 e3 38. Rxe3 Be4+ 39. Ka2 Rc1 40. Nd5 Bb1+ 41. Ka3 Kg6 42. Nc3 Bc2 43. Kb4 Kg7 44. f5 Bxf5 45. g4 Bc2 46. Rd2 Bg6 47. Rd1 Rc2 48. Re2 Nf4 49. Rxc2 Bxc2 50. Rd2 Bd3 51. Ka5 Bg6 52. b4 Ne6 53. b5 Nc5 54. Kb4 Nd3+ 55. Rxd3 Bxd3 56. b6 Ba6 57. Ne4 Bb7 58. Nd6 Ba8 59. b7 Bxb7 60. Nxb7 Kf8 61. Kc5 Ke7 62. Kd5 f6 63. e6 1-0

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.15"]
[Round "3"]
[White "Werthmann, Niklas"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "1675"]
[BlackElo "1875"]
[PlyCount "27"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. f4 Ngf6 6. Nf3 g6 7. 0-0 Bg7 8. d3 0-0 9. Qe1 e6 10. Qh4 Nh5 11. f5 Qxh4 12. Nxh4 Nhf6 13. Nb5 d5 14. fxe6 1/2-1/2

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.14"]
[Round "2"]
[White "Jahrke, Jonas"]
[Black "Gromov, Alexander"]
[Result "0-1"]
[ECO "A38"]
[WhiteElo "1875"]
[BlackElo "1722"]
[PlyCount "74"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 0-0 5. Bg2 c5 6. 0-0 Nc6 7. c4 d6 8. Nc3 a6 9. e3 Bf5 10. d3 Rb8 11. e4 Bg4 12. h3 Bxf3 13. Bxf3 Nd4 14. Bg2 Nd7 15. Rb1 b5 16. Ne2 e5 17. Bxd4 cxd4 18. cxb5 axb5 19. b4 Ra8 20. Qb3 Nb6 21. Rfc1 Qd7 22. Rc2 Rfc8 23. Rbc1 Rxc2 24. Rxc2 Rc8 25. f4 Na4 26. Kh2 Rc6 27. Kg1 Qc7 28. Rxc6 Qxc6 29. Kf2 Nc3 30. Bf3 Nxe2 31. Bxe2 Qc1 32. Qd1 Qe3+ 33. Kg2 exf4 34. gxf4 Qxf4 35. a4 Be5 36. a5 Qh2+ 37. Kf1 Bg3 0-1

[Event "Dortmund Sparkassen op-B 47th"]
[Site "Dortmund"]
[Date "2019.07.13"]
[Round "1"]
[White "Schlaeger, Reiner"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B92"]
[WhiteElo "1670"]
[BlackElo "1875"]
[PlyCount "64"]
[EventDate "2019.07.13"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 192 Extra"]
[Source "Chessbase"]
[SourceDate "2019.11.06"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 b5 8. a3 Bb7 9. Qd3 Be7 10. 0-0 0-0 11. Be3 Nbd7 12. f4 Re8 13. g4 exf4 14. Rxf4 Ne5 15. Qd4 Ng6 16. Rf2 Bf8 17. Raf1 Re7 18. Bg5 Re6 19. Nd5 Bxd5 20. exd5 Re5 21. Bxf6 gxf6 22. Nd2 Bh6 23. Ne4 Bg7 24. g5 f5 25. Nf6+ Bxf6 26. gxf6 Qxf6 27. Rxf5 Qxf5 28. Rxf5 Rxf5 29. c4 Re8 30. Qg4 Rf4 31. Qd7 Rxe2 32. Qxd6 Rxc4 0-1

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.30"]
[Round "7"]
[White "Rades, Andreas"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1527"]
[BlackElo "1744"]
[PlyCount "76"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. d4 0-0 5. 0-0 d5 6. Nbd2 b6 7. Ne5 Bb7 8. c4 e6 9. h3 Nbd7 10. Ndf3 c5 11. b3 Rc8 12. Ba3 Re8 13. Rc1 h5 14. e3 Qc7 15. Bb2 Qb8 16. Re1 Red8 17. Qe2 Nxe5 18. Nxe5 Nd7 19. Nf3 Ba6 20. Qd1 cxd4 21. cxd5 dxe3 22. Rxc8 Qxc8 23. Bxg7 Kxg7 24. Qd4+ Nf6 25. Qxe3 Nxd5 26. Qe5+ Kg8 27. Qb2 Bb7 28. Rd1 Ne7 29. Rxd8+ Qxd8 30. Qd2 Qxd2 31. Nxd2 Bxg2 32. Kxg2 Nd5 33. Nb1 Kf8 34. Kf3 Ke7 35. Ke4 Kd6 36. f4 f5+ 37. Kd4 h4 38. Nc3 Nxc3 0-1

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.29"]
[Round "6"]
[White "Hart, Theo1111"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "E67"]
[WhiteElo "1922"]
[BlackElo "1744"]
[PlyCount "67"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 d6 6. c4 Nbd7 7. Nc3 e5 8. e4 Re8 9. dxe5 dxe5 10. Qc2 c6 11. Rd1 Qc7 12. h3 h6 13. Be3 Nb6 14. b3 Be6 15. c5 Nbd7 16. Rd2 Rad8 17. Rad1 Kh7 18. g4 Ng8 19. Ne2 Ne7 20. Ng3 a5 21. Nf5 gxf5 22. exf5 Bxf5 23. gxf5 f6 24. Nh4 Nb8 25. Rd6 Na6 26. a3 Qc8 27. Be4 Nc7 28. Qe2 Ncd5 29. R1xd5 cxd5 30. Qh5 d4 31. Bxh6 Bxh6 32. Rxf6 Rg8+ 33. Kh2 Rg7 34. Rxh6+ 1-0

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.29"]
[Round "5"]
[White "Jahrke, Jonas"]
[Black "Dette, Jan"]
[Result "0-1"]
[ECO "B94"]
[WhiteElo "1744"]
[BlackElo "2096"]
[PlyCount "50"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. f4 Qc7 8. Qf3 b5 9. 0-0-0 Bb7 10. Bd3 b4 11. Nce2 e6 12. Rhe1 Be7 13. Kb1 Nc5 14. Ng3 Na4 15. Qe2 0-0 16. Bxf6 Bxf6 17. e5 dxe5 18. fxe5 Bg5 19. Qh5 h6 20. h4 Bf4 21. Ne4 Bxe5 22. Nxe6 fxe6 23. Ng5 Rf6 24. Nh7 Bxb2 25. Nxf6+ Bxf6 0-1

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.28"]
[Round "3"]
[White "Jahrke, Jonas"]
[Black "Mamikonyan, Davit"]
[Result "1-0"]
[ECO "C06"]
[WhiteElo "1744"]
[BlackElo "1940"]
[PlyCount "147"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Nxf6 10. Nf3 Bd6 11. 0-0 0-0 12. Re1 Qc7 13. Bg5 Bd7 14. Rc1 Rae8 15. a3 a5 16. Qc2 h6 17. Bh4 Qb8 18. Bg3 e5 19. dxe5 Nxe5 20. Nxe5 Bxe5 21. Bg6 Rc8 22. Qd2 Rxc1 23. Rxc1 a4 24. Bxe5 Qxe5 25. f3 Bc6 26. Nd4 Qd6 27. Re1 Qc5 28. Kh1 Bd7 29. Bf5 Bxf5 30. Nxf5 Rf7 31. Rc1 Qb6 32. Rc8+ Kh7 33. Qc2 g6 34. Nh4 Ne4 35. h3 Ng3+ 36. Kh2 Qd6 37. Qxa4 Re7 38. Qb4 Qxb4 39. axb4 Ne2 40. Rd8 d4 41. Rd6 Rc7 42. Nxg6 Rc6 43. Rxc6 bxc6 44. Ne5 Nc1 45. Kg3 d3 46. Nc4 Na2 47. b5 cxb5 48. Nd2 Kg6 49. Kf4 Nc1 50. Ke3 h5 51. h4 Kf5 52. Ne4 Ke5 53. g3 Na2 54. Kxd3 Nb4+ 55. Ke3 Nd5+ 56. Kd3 Nb4+ 57. Kd2 Nc6 58. Ng5 Kf5 59. Ke3 Ke5 60. Nf7+ Ke6 61. Ng5+ Ke5 62. g4 hxg4 63. fxg4 Na5 64. Nf3+ Kf6 65. Kd4 Nc4 66. b3 Na5 67. b4 Nc4 68. Kc5 Ne3 69. g5+ Kf5 70. Kxb5 Kg4 71. Kc6 Kxf3 72. b5 Nf5 73. b6 Nd4+ 74. Kd7 1-0

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.28"]
[Round "4"]
[White "Vishanji, Adrian"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1900"]
[BlackElo "1744"]
[PlyCount "82"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. Nd5 Nbd7 9. Bg5 Bxd5 10. exd5 Be7 11. Bxf6 Nxf6 12. Qd2 0-0 13. 0-0-0 Rc8 14. f3 Qc7 15. Kb1 b5 16. g4 Nd7 17. Bd3 Nb6 18. Be4 Nc4 19. Qd3 h6 20. h4 a5 21. g5 h5 22. g6 a4 23. Nd2 a3 24. Nxc4 bxc4 25. Qxa3 f5 26. Qe3 fxe4 27. fxe4 Rf4 28. Rdg1 c3 29. Qe2 cxb2 30. Rh2 Qc4 31. Qxh5 Rf1+ 32. Rxf1 Qxf1+ 33. Kxb2 Rb8+ 34. Kc3 Qa1+ 35. Kd2 Qd4+ 36. Ke2 Qxe4+ 37. Kf2 Qxc2+ 38. Kg3 Qd3+ 39. Qf3 Qxg6+ 40. Kh3 Rf8 41. Qe3 Rf4 0-1

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.27"]
[Round "1"]
[White "Jahrke, Jonas"]
[Black "Bergen, Katja"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1744"]
[PlyCount "79"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. c3 a6 6. b4 Ba7 7. h3 b5 8. Bb3 d6 9. Nbd2 h6 10. Nf1 Be6 11. Ng3 Qd7 12. Be3 d5 13. Bxa7 Rxa7 14. 0-0 0-0 15. Re1 Re8 16. a4 Rea8 17. Bc2 Qd6 18. Nh2 d4 19. cxd4 Qxd4 20. Rb1 Nxb4 21. Nf3 Qc3 22. Bb3 bxa4 23. Bxe6 fxe6 24. Qxa4 a5 25. Rec1 Qxd3 26. Nxe5 Qa6 27. Nc6 Nxc6 28. Rxc6 Qc8 29. Qc4 Kf7 30. Ne2 Rb8 31. Rxb8 Qxb8 32. Qxe6+ Kf8 33. e5 Ne8 34. Nf4 Qb1+ 35. Kh2 g5 36. Ng6+ Kg7 37. Qe7+ Kg8 38. Qxe8+ Kg7 39. Qf8+ Kh7 40. Qh8# 1-0

[Event "Gelsenkirchen Silvester op 6th"]
[Site "Gelsenkirchen"]
[Date "2018.12.27"]
[Round "2"]
[White "Ziabari, Morteza"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "1927"]
[BlackElo "1744"]
[PlyCount "75"]
[EventDate "2018.12.27"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 188 Extra"]
[Source "ChessBase"]
[SourceDate "2019.02.26"]
[SourceVersion "1"]
[SourceVersionDate "2019.02.26"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. f4 g6 4. Nf3 Bg7 5. Bc4 Nc6 6. 0-0 e6 7. Ne2 Nge7 8. Ng3 a6 9. c3 b5 10. Bb3 c4 11. Bc2 Bb7 12. Qe2 d5 13. d4 0-0 14. e5 b4 15. Bd2 a5 16. Rfb1 Qc7 17. Qe1 bxc3 18. bxc3 Rfb8 19. a4 Bc8 20. Bc1 Bd7 21. Ba3 Bf8 22. Bd6 Rxb1 23. Rxb1 Qa7 24. Nf1 Kg7 25. Qh4 Ng8 26. Bxf8+ Rxf8 27. g4 f6 28. Qg3 Rb8 29. Re1 Qb6 30. f5 Re8 31. exf6+ Nxf6 32. g5 Nh5 33. Qd6 Rd8 34. f6+ Kg8 35. Ne5 Qb8 36. f7+ Kg7 37. f8Q+ Rxf8 38. Qxd7+ 1-0

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.30"]
[Round "7.1"]
[White "Huber, Benedikt"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2006"]
[BlackElo "1666"]
[PlyCount "79"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Muenchen Suedost"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. Nc3 Bg7 5. e4 0-0 6. h4 d6 7. h5 Re8 8. hxg6 fxg6 9. Qf3 c6 10. a4 d5 11. 0-0-0 Be6 12. exd5 cxd5 13. Nge2 Qd7 14. Nf4 Bg4 15. Qxd5+ Qxd5 16. Nfxd5 Bxd1 17. Nc7 Nc6 18. Nxe8 Rxe8 19. Bc4+ Kh8 20. Rxd1 f5 21. Nb5 Bh6+ 22. Kb1 a6 23. Nd6 Re7 24. Nf7+ Kg7 25. Nxh6 Kxh6 26. d5 Nd8 27. Bf1 Nf7 28. c4 b6 29. b4 Rc7 30. Kb2 Nd6 31. Kb3 Kg5 32. f3 Kf4 33. Re1 Kg3 34. Re6 Nc8 35. d6 Rd7 36. c5 a5 37. Bb5 Rd8 38. Re8 Rxe8 39. Bxe8 axb4 40. d7 1-0

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.29"]
[Round "6.1"]
[White "Jahrke, Jonas"]
[Black "Burian, Simon"]
[Result "1/2-1/2"]
[ECO "B99"]
[WhiteElo "1666"]
[BlackElo "1980"]
[PlyCount "83"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Plauen Koenig"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Nbd7 9. Bd3 Qc7 10. 0-0-0 h6 11. Bh4 b5 12. Kb1 Bb7 13. Qg3 Rg8 14. Rde1 0-0-0 15. Bxf6 Bxf6 16. Nde2 Nc5 17. Qe3 Kb8 18. Rhf1 Rd7 19. h3 Rgd8 20. g3 Rf8 21. Rc1 Qd8 22. Rfd1 g6 23. e5 dxe5 24. fxe5 Bg5 25. Nf4 Nxd3 26. cxd3 h5 27. h4 Bxf4 28. Qxf4 Rxd3 29. Rxd3 Qxd3+ 30. Ka1 Qf5 31. Qe3 Rd8 32. Qe2 Qd3 33. Qf2 Qd2 34. Rf1 Qxf2 35. Rxf2 Rd7 36. Kb1 Kc7 37. Kc2 Kd8 38. Rd2 Bc6 39. Rxd7+ Kxd7 40. Kd3 Bg2 41. Kd4 Kc6 42. b4 1/2-1/2

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.29"]
[Round "5.1"]
[White "Krastev, Alexander"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "1988"]
[BlackElo "1666"]
[PlyCount "87"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Biebertal"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nc3 e6 3. Nf3 a6 4. g3 Nc6 5. d4 cxd4 6. Nxd4 Qc7 7. Bg2 Be7 8. 0-0 Nf6 9. Re1 d6 10. Nxc6 bxc6 11. e5 dxe5 12. Rxe5 Nd5 13. Nxd5 exd5 14. Bf4 Qb6 15. Re2 Bb7 16. c3 0-0 17. Qb3 Bc5 18. Qxb6 Bxb6 19. c4 Rfd8 20. Rd1 Rac8 21. b3 Bc7 22. Bxc7 Rxc7 23. Red2 Rcd7 24. cxd5 cxd5 25. Kf1 Kf8 26. Rd4 Ke7 27. Ke2 Rc7 28. Rxd5 Rxd5 29. Rxd5 Rc2+ 30. Rd2 Rc5 31. Kd1 Ke6 32. Rd4 Rd5 33. Bxd5+ Bxd5 34. Rxd5 Kxd5 35. Kd2 a5 36. Kd3 f5 37. h4 g6 38. f3 h6 39. g4 fxg4 40. fxg4 g5 41. h5 Kc5 42. Kc3 Kc6 43. Kc4 Kb6 44. Kd5 1-0

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.28"]
[Round "4.1"]
[White "Jahrke, Jonas"]
[Black "Triantafillidis, Simeon"]
[Result "1/2-1/2"]
[ECO "C96"]
[WhiteElo "1666"]
[BlackElo "1769"]
[PlyCount "65"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Biberach"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. 0-0 0-0 6. c3 d6 7. h3 Na5 8. Bb5 c5 9. Re1 a6 10. Ba4 b5 11. Bc2 Nc6 12. d4 cxd4 13. cxd4 Qc7 14. Be3 Nb4 15. Bd3 Bb7 16. d5 Nxe4 17. Bxe4 f5 18. Bxf5 Rxf5 19. Nc3 Qc4 20. Rc1 Nxd5 21. Nxd5 Qxd5 22. Qxd5+ Bxd5 23. Nd2 Raf8 24. Rc7 Bg5 25. g4 Bxe3 26. gxf5 Bxd2 27. Rd1 Ba5 28. Ra7 Bc4 29. Rxd6 Rxf5 30. Rdxa6 Rg5+ 31. Kh2 Bd2 32. Ra8+ Kf7 33. R8a7+ 1/2-1/2

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.28"]
[Round "3.1"]
[White "Kotyk, Michael"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "1945"]
[BlackElo "1666"]
[PlyCount "120"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Hamburger SK"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Bg5 h6 7. Be3 Nbd7 8. h4 e5 9. d5 Nc5 10. f3 Nh5 11. Qd2 Ng3 12. Rh2 Kh7 13. Bf2 Nxe2 14. Ngxe2 f5 15. b4 Na6 16. a3 c5 17. Rb1 fxe4 18. Nxe4 Bf5 19. N2c3 b6 20. h5 g5 21. Qe2 Qe7 22. g4 Bd7 23. Nd1 Nc7 24. Ne3 Ne8 25. Ng3 Kg8 26. Nef5 Bxf5 27. Nxf5 Rxf5 28. gxf5 Qd7 29. Qc2 Nf6 30. Bg3 Re8 31. bxc5 dxc5 32. Rb3 e4 33. Re2 Nxh5 34. fxe4 Nxg3 35. Rxg3 Be5 36. Rh3 Qd6 37. Qd3 Rf8 38. Qf3 Kg7 39. Kf1 Rf6 40. Kg2 Bf4 41. e5 Bxe5 42. Qe4 Bf4 43. Qe7+ Qxe7 44. Rxe7+ Kf8 45. Re6 Rxf5 46. Rhxh6 b5 47. Rhf6+ Rxf6 48. Rxf6+ Kg7 49. Rc6 bxc4 50. Rxc5 Kf6 51. Rxc4 Bd6 52. Ra4 Bc5 53. Ra5 Bb6 54. Rb5 Ke5 55. Kf3 g4+ 56. Kxg4 Kd6 57. Kf5 Ke7 58. Ke4 Kd6 59. Rb3 Bc5 60. Rh3 Bxa3 1-0

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.27"]
[Round "1.1"]
[White "Dietz, Florian"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "1953"]
[BlackElo "1666"]
[PlyCount "87"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Halle Reideburger"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qc7 6. 0-0 d6 7. c4 Nd7 8. Qe2 Ngf6 9. Nc3 Be7 10. f4 0-0 11. Be3 b6 12. Kh1 Bb7 13. Rae1 Nc5 14. Bg1 Nxd3 15. Qxd3 Rac8 16. e5 dxe5 17. fxe5 Nd7 18. Qg3 Rfd8 19. Nd5 exd5 20. Nf5 Bf8 21. Nh6+ Kh8 22. Nxf7+ Kg8 23. Nh6+ Kh8 24. Nf7+ Kg8 25. e6 Qxg3 26. hxg3 Nf6 27. Nxd8 Rxd8 28. e7 Bxe7 29. Rxe7 Bc6 30. Bxb6 Rb8 31. Bd4 dxc4 32. Bxf6 gxf6 33. Rxf6 Bd5 34. Rd6 Bf7 35. Rdd7 Bg6 36. Rb7 Rf8 37. Ra7 Bd3 38. Rg7+ Kh8 39. Rgd7 Rb8 40. Kh2 Bf5 41. Rdb7 Rg8 42. Rc7 Bd3 43. g4 Be2 44. Rxh7# 1-0

[Event "GER-chT U14"]
[Site "Verden an der Aller"]
[Date "2017.12.27"]
[Round "2.1"]
[White "Jahrke, Jonas"]
[Black "Abele, Anais"]
[Result "1-0"]
[ECO "B98"]
[WhiteElo "1666"]
[BlackElo "1636"]
[PlyCount "71"]
[EventDate "2017.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 182 Extra"]
[Source "ChessBase"]
[SourceDate "2018.02.23"]
[SourceVersion "1"]
[SourceVersionDate "2018.02.23"]
[SourceQuality "1"]
[WhiteTeam "Essen Katernberg"]
[BlackTeam "Aurich"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Nbd7 9. Bd3 h6 10. Bh4 Nc5 11. 0-0-0 Nxd3+ 12. Qxd3 Qc7 13. h3 Bd7 14. Rhe1 Nh7 15. Bxe7 Kxe7 16. Nf5+ Kf8 17. Nxd6 Bc6 18. e5 Bxg2 19. Nce4 Bxe4 20. Qxe4 Rb8 21. Re3 Kg8 22. Rc3 Qe7 23. Rc8+ Rxc8 24. Nxc8 Qc7 25. Nd6 g5 26. Nxb7 Kg7 27. Nd6 Rb8 28. f5 Qb6 29. f6+ Kg8 30. b3 Qc7 31. Rd4 Rd8 32. Nxf7 Rxd4 33. Nxh6+ Kf8 34. Qxd4 Qb7 35. Qd6+ Ke8 36. Qxe6+ 1-0

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.17"]
[Round "9"]
[White "Turp, Hueseyin"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "E60"]
[WhiteElo "1510"]
[BlackElo "1383"]
[PlyCount "142"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. f3 Bg7 4. e4 d6 5. Bg5 c5 6. dxc5 Qa5+ 7. Qd2 Qxc5 8. Bh6 0-0 9. Bxg7 Kxg7 10. Nc3 Be6 11. Nd5 Bxd5 12. cxd5 Nbd7 13. Rc1 Qb6 14. Bd3 Nc5 15. b3 Rac8 16. Ne2 a6 17. g3 Rc7 18. Kf1 Rfc8 19. Kg2 Nfd7 20. Bc2 Ne5 21. f4 Ng4 22. h3 Nxe4 23. Qd4+ Qxd4 24. Nxd4 Ne3+ 25. Kf3 Nxc2 26. Rxc2 Rxc2 27. Nxc2 Rxc2 28. Kxe4 Rxa2 29. Rc1 Rb2 30. Rc3 b5 31. Rd3 Kf6 32. g4 h5 33. g5+ Kg7 34. Kd4 f5 35. Kc3 Rf2 36. Kb4 Rxf4+ 37. Ka5 b4 38. Kxa6 Re4 39. Kb5 Kf7 40. Kc6 Ke8 41. Kc7 f4 42. Kc6 Re3 43. Rd4 Rxb3 44. Rxf4 Rc3+ 45. Kb5 b3 46. h4 b2 47. Rb4 Rc5+ 48. Kb6 Rxd5 49. Rxb2 Rd4 50. Kc6 Rxh4 51. Rb8+ Kf7 52. Kd7 Re4 53. Rb1 Rg4 54. Rf1+ Kg7 55. Kxe7 Rxg5 56. Kxd6 Rf5 57. Rg1 Kh6 58. Ke6 Rf2 59. Ke5 g5 60. Ke4 g4 61. Ke3 Rf8 62. Ra1 Kg5 63. Rb1 g3 64. Rb5+ Kg4 65. Rb4+ Kh3 66. Ke2 h4 67. Rb3 Kh2 68. Rb4 h3 69. Ke3 g2 70. Rb2 Kh1 71. Ke2 g1Q 0-1

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.16"]
[Round "8"]
[White "Jahrke, Jonas"]
[Black "Lohmar, Hermann"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1383"]
[BlackElo "1521"]
[PlyCount "140"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h6 5. Nf3 e6 6. c3 c5 7. Be3 cxd4 8. cxd4 Bb4+ 9. Nc3 Ne7 10. Bb5+ Nbc6 11. Qa4 0-0 12. a3 Bxc3+ 13. bxc3 Qa5 14. Qxa5 Nxa5 15. Nd2 Rac8 16. Rc1 Nc4 17. Bxc4 dxc4 18. Rg1 Nd5 19. g4 Bd3 20. g5 Kh7 21. Nf3 Rc6 22. Bd2 Rb6 23. Nh2 h5 24. f3 Rb3 25. a4 Ra3 26. Kf2 Rxa4 27. g6+ Bxg6 28. Rg3 Ra2 29. Nf1 Rc2 30. Rxc2 Bxc2 31. Ne3 Nxe3 32. Kxe3 a5 33. Rg1 a4 34. Ra1 Rc8 35. Bc1 Rc6 36. Ba3 Rb6 37. Bb4 f6 38. f4 Rb5 39. Kd2 Bb3 40. Ke3 fxe5 41. fxe5 Rb6 42. Kf4 Kh6 43. Rg1 Rc6 44. Ke4 Rc7 45. Re1 Rf7 46. Ke3 Rf5 47. Rg1 g5 48. hxg5+ Rxg5 49. Rxg5 Kxg5 50. Kf3 Kf5 51. Kg3 Ke4 52. Kh4 Kd3 53. Kxh5 a3 54. Bxa3 Kxc3 55. Kg4 Kxd4 56. Kf4 c3 57. Bc1 Kd3 58. Be3 b5 59. Kf3 Bd1+ 60. Kf4 b4 61. Bc5 b3 62. Be3 b2 63. Kg3 b1Q 64. Kg2 c2 65. Kh2 c1Q 66. Bxc1 Qxc1 67. Kh1 Bf3+ 68. Kh2 Qd2+ 69. Kg3 Qg2+ 70. Kf4 Qg4# 0-1

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.15"]
[Round "7"]
[White "Skapski, Miroslav"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B43"]
[WhiteElo "1540"]
[BlackElo "1383"]
[PlyCount "103"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be2 Nf6 7. 0-0 b5 8. Bf3 Bb7 9. Re1 d6 10. Bg5 Nbd7 11. Rc1 Be7 12. g3 0-0 13. Bg2 h6 14. Bd2 Nc5 15. Nb3 b4 16. Nb1 Ncxe4 17. Bxb4 Qb6 18. Qd4 Qxd4 19. Nxd4 Rab8 20. Ba3 Rfe8 21. f3 Ng5 22. h4 Ngh7 23. Nd2 d5 24. Bxe7 Rxe7 25. Re3 Ree8 26. Rce1 Nf8 27. Bf1 N8d7 28. Rc3 Rec8 29. Rxc8+ Rxc8 30. f4 Nc5 31. Bg2 g6 32. b3 Ncd7 33. c4 Nb8 34. Rc1 Nbd7 35. b4 Nb6 36. c5 Nbd7 37. N2b3 Nb8 38. a4 Nc6 39. b5 Na7 40. c6 Ba8 41. Na5 axb5 42. axb5 Rb8 43. c7 Re8 44. b6 Nc8 45. b7 Bxb7 46. Nxb7 Re7 47. Nb5 Ne8 48. Rc6 d4 49. N7d6 Nexd6 50. Nxd6 d3 51. Nxc8 d2 52. Nxe7+ 1-0

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.14"]
[Round "6"]
[White "Wickenfeld, Udo"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "1367"]
[BlackElo "1383"]
[PlyCount "44"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. e4 d6 6. Be2 Nbd7 7. 0-0 e5 8. d5 Nc5 9. Qc2 a5 10. a4 Nh5 11. Bg5 f6 12. Be3 b6 13. Nd2 Nf4 14. Bxf4 exf4 15. f3 f5 16. Rab1 Bd4+ 17. Kh1 Qh4 18. Nb5 Be3 19. Nxc7 Rb8 20. b3 g5 21. Nb5 Rf6 22. Qd3 Qxh2+ 0-1

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.13"]
[Round "5"]
[White "Jahrke, Jonas"]
[Black "Spenk, Willi"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1383"]
[BlackElo "1596"]
[PlyCount "64"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 d6 2. d4 b6 3. Nc3 Bb7 4. f4 e6 5. Nf3 Nd7 6. Bd3 g6 7. Bd2 Ne7 8. 0-0 Bg7 9. Qe1 0-0 10. g4 f5 11. exf5 exf5 12. Ng5 Bxd4+ 13. Be3 Bxe3+ 14. Qxe3 Rf6 15. Ne6 Qc8 16. Nxc7 Qxc7 17. Qxe7 Qc6 18. Kf2 Rf7 19. Qe2 Kf8 20. Rg1 Re8 21. Qd1 fxg4 22. Qxg4 Ne5 23. Qg3 Qc5+ 24. Kf1 Nxd3 25. cxd3 Re3 26. Qg4 Rf3+ 27. Ke1 Qf2+ 28. Kd1 Rxd3+ 29. Kc1 Qe3+ 30. Kc2 Rd2+ 31. Kb3 Bd5+ 32. Ka3 Qc5+ 0-1

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.12"]
[Round "4"]
[White "Reinacher, Detlev"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "1562"]
[BlackElo "1383"]
[PlyCount "131"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. d3 e6 3. g3 Nc6 4. Bg2 Nf6 5. c3 d5 6. Nd2 Be7 7. Ngf3 0-0 8. Qc2 b5 9. b3 a5 10. Bb2 b4 11. c4 d4 12. 0-0 e5 13. Rae1 a4 14. Nxe5 Nxe5 15. f4 Neg4 16. e5 Ne3 17. Rxe3 dxe3 18. exf6 Bxf6 19. Bxa8 exd2 20. Bd5 Bh3 21. Rd1 a3 22. Bxf6 Qxf6 23. Qxd2 Re8 24. Qf2 Qb2 25. Qxb2 axb2 26. Kf2 Bg4 27. Bf3 Bxf3 28. Kxf3 Ra8 29. Rb1 Rxa2 30. Ke4 Ra8 31. Rxb2 Rd8 32. Ra2 f5+ 33. Ke3 Re8+ 34. Kd2 g6 35. Ra5 Rc8 36. Rb5 Rc7 37. d4 Kf7 38. Rxc5 Rxc5 39. dxc5 Ke6 40. Kd3 Kd7 41. c6+ Kxc6 42. Kd4 h6 43. h4 h5 44. c5 Kc7 45. Kc4 Kc6 46. Kd4 Kc7 47. Kd5 Kd7 48. c6+ Kc7 49. Kc5 Kc8 50. Kxb4 Kc7 51. Kc5 Kc8 52. b4 Kc7 53. b5 Kc8 54. Kb6 Kb8 55. Ka6 g5 56. hxg5 h4 57. gxh4 Ka8 58. b6 Kb8 59. c7+ Kc8 60. Ka7 Kd7 61. Kb7 Kd6 62. c8Q Ke7 63. Qxf5 Ke8 64. Ka7 Kd8 65. b7 Ke7 66. b8Q 1/2-1/2

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.11"]
[Round "3"]
[White "Jahrke, Jonas"]
[Black "Von Kampen, Sebastian"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1383"]
[BlackElo "1587"]
[PlyCount "74"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 4. 0-0 Nf6 5. Re1 Bc5 6. c3 d6 7. d4 exd4 8. cxd4 Bb6 9. e5 dxe5 10. Nxe5 0-0 11. Qb3 Nxe5 12. dxe5 Ng4 13. Re2 Kh8 14. h3 Nxf2 15. Rxf2 Bxf2+ 16. Kxf2 Qd4+ 17. Be3 Qxe5 18. Nd2 Bf5 19. Re1 Qf6 20. Nf3 Be6 21. Bd4 Bxc4 22. Qxc4 Qg6 23. Qc3 b6 24. g4 c5 25. Be5 Rfe8 26. Nh4 Qg5 27. Nf5 f6 28. Bg3 Qg6 29. Kg2 Rxe1 30. Qxe1 Re8 31. Qd2 h5 32. Kf3 Qh7 33. Qd7 hxg4+ 34. Kxg4 Qg6+ 35. Kf4 Qg5+ 36. Kf3 Qh5+ 37. Kf4 g5# 0-1

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.10"]
[Round "2"]
[White "Vorobyov, Boris"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1566"]
[BlackElo "1383"]
[PlyCount "86"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 5. Bc4 Nb6 6. Bb3 Nc6 7. Nf3 d5 8. exd6 Qxd6 9. 0-0 h6 10. Na3 a6 11. Qe2 g6 12. Rd1 Bg7 13. Be3 Bg4 14. h3 Bxf3 15. Qxf3 Qf6 16. Qxf6 Bxf6 17. cxd4 e6 18. Rd2 0-0-0 19. Rad1 Rd7 20. Nc4 Nd5 21. Kf1 h5 22. Ke2 Rhd8 23. Na3 Ndb4 24. Nc2 Nxc2 25. Rxc2 Kb8 26. Ba4 Nxd4+ 27. Bxd4 Rxd4 28. Rxd4 Rxd4 29. Bb3 b5 30. a3 b4 31. Rc4 Rxc4 32. Bxc4 bxa3 33. bxa3 a5 34. Bb5 Be7 35. a4 f5 36. Be8 g5 37. Bxh5 Kc7 38. Kd3 Kd6 39. Be8 Kd5 40. Bd7 f4 41. f3 e5 42. Bb5 Bb4 43. Be8 Bc5 1/2-1/2

[Event "Dortmund Sparkassen op-B 44th"]
[Site "Dortmund"]
[Date "2016.07.09"]
[Round "1"]
[White "Jahrke, Jonas"]
[Black "Zygan, Michael"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1383"]
[BlackElo "1693"]
[PlyCount "96"]
[EventDate "2016.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 173 Extra"]
[Source "ChessBase"]
[SourceDate "2016.08.29"]
[SourceVersion "1"]
[SourceVersionDate "2016.08.29"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Nf3 e6 6. c3 c5 7. Bg5 Qb6 8. Qb3 Qxb3 9. axb3 Nc6 10. Bb5 Bxb1 11. Rxb1 Nh6 12. 0-0 Rc8 13. dxc5 Bxc5 14. b4 Bb6 15. Ra1 Ng4 16. b3 0-0 17. Bxc6 Rxc6 18. Rac1 Rfc8 19. Bd2 a6 20. Nd4 R6c7 21. Rce1 Bxd4 22. cxd4 Rc2 23. Rc1 Kh7 24. Bf4 Kg6 25. f3 Nh6 26. Rxc2 Rxc2 27. Rc1 Rxc1+ 28. Bxc1 Nf5 29. Bb2 Nxh4 30. Kf2 b5 31. g4 hxg4 32. fxg4 Kh7 33. Kg3 Ng6 34. g5 Ne7 35. Kf4 Kg6 36. Kg4 Nf5 37. Bc3 Ne3+ 38. Kf4 Nd1 39. Bd2 Nf2 40. Be3 Nd3+ 41. Kf3 Nxb4 42. Ke2 Kf5 43. Kf3 Nc6 44. Kg3 a5 45. Kf3 a4 46. bxa4 bxa4 47. Bc1 Nxd4+ 48. Ke3 Nb3 0-1

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.21"]
[Round "9"]
[White "Strassburg, Robin Leonard"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "E83"]
[WhiteElo "1541"]
[BlackElo "1417"]
[PlyCount "131"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 0-0 6. Be3 Nc6 7. Bd3 a6 8. Qd2 Rb8 9. Nge2 e5 10. d5 Ne7 11. Bh6 c5 12. Bxg7 Kxg7 13. g4 Bd7 14. h4 b5 15. cxb5 axb5 16. h5 b4 17. Nd1 Qc7 18. hxg6 fxg6 19. b3 Ra8 20. Ng3 Qc8 21. Qh6+ Kf7 22. g5 Nfg8 23. Qxh7+ Ke8 24. Be2 Ra7 25. Nb2 Qa8 26. Nc4 Qb8 27. Bd1 Ra6 28. 0-0 Qc8 29. Rf2 Rf7 30. Qh4 Rf4 31. Qh2 Qd8 32. Ne2 Rf7 33. Qg3 Nc8 34. Rh2 Qe7 35. Nc1 Nb6 36. Nxb6 Rxb6 37. Rb1 Ra6 38. Rbb2 Rh7 39. Rxh7 Qxh7 40. Rh2 Qf7 41. Be2 Ra7 42. Bf1 Qe7 43. Bh3 Bxh3 44. Rxh3 Kf8 45. Qg4 Qd7 46. Qxd7 Rxd7 47. Kf2 Rc7 48. Nd3 Ra7 49. Nc1 Rc7 50. Ke3 Kg7 51. Rh2 Ne7 52. Nd3 Nc8 53. f4 exf4+ 54. Nxf4 Ra7 55. Ne6+ Kg8 56. Rf2 Rf7 57. Rxf7 Kxf7 58. Nd8+ Ke7 59. Nb7 Na7 60. Kf4 Nb5 61. e5 Nc3 62. exd6+ Kd7 63. Ke5 Nxa2 64. Nxc5+ Ke8 65. d7+ Kd8 66. Kd6 1-0

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.20"]
[Round "8"]
[White "Jahrke, Jonas"]
[Black "Borgmann, Simon"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1417"]
[BlackElo "1318"]
[PlyCount "85"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. 0-0 Bd7 10. Nc3 Bf5 11. Bxc6+ bxc6 12. Be3 0-0 13. Nxe4 Bxe4 14. Ng5 Bf5 15. f4 f6 16. Nf3 Qe7 17. Rc1 Qd7 18. h3 Be4 19. Kh2 Bxf3 20. Rxf3 fxe5 21. fxe5 Rxf3 22. gxf3 Rf8 23. f4 a5 24. Qg4 Qe8 25. b3 g6 26. Qg2 Rf5 27. Qc2 Kf7 28. Qxc6 Qe6 29. Qxe6+ Kxe6 30. Kg3 Kd7 31. a3 Rf8 32. Kg4 Rf5 33. b4 a4 34. b5 h5+ 35. Kf3 Rf8 36. Rg1 Rg8 37. f5 g5 38. Rxg5 Rxg5 39. Bxg5 Bxd4 40. e6+ Ke8 41. f6 Bc5 42. f7+ Kf8 43. Bh6+ 1-0

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.19"]
[Round "7"]
[White "Grey, Andrea"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "1383"]
[BlackElo "1417"]
[PlyCount "60"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. d4 0-0 5. c4 d6 6. e3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bxe5 Nc6 10. Bb2 Nb4 11. Na3 Ne4 12. Bxg7 Kxg7 13. Be2 Nc3 14. Bd1 Nd3+ 15. Kf1 Nb4 16. Ke1 Nbxa2 17. Nb5 Nxb5 18. Rxa2 Nc3 19. Rd2 Bg4 20. h3 Nxd1 21. Kxd1 Bxf3+ 22. gxf3 Rxd2+ 23. Kxd2 Rd8+ 24. Kc2 Kf6 25. Rg1 a5 26. h4 b6 27. Rg5 Re8 28. Rd5 Re5 29. Rd7 Rh5 30. Rxc7 Rxh4 1/2-1/2

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.18"]
[Round "6"]
[White "Jahrke, Jonas"]
[Black "Ziegenfuss, Larissa"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1417"]
[BlackElo "1281"]
[PlyCount "67"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 c5 2. c3 e6 3. d4 cxd4 4. cxd4 Nc6 5. Nf3 d6 6. Nc3 Be7 7. Bd3 Nf6 8. 0-0 0-0 9. Re1 Nb4 10. Bb1 d5 11. e5 Nd7 12. a3 Nc6 13. Qd3 g6 14. Bh6 Re8 15. h3 Bf8 16. Qe3 Bg7 17. Bxg7 Kxg7 18. Bc2 a6 19. Red1 Na5 20. b3 Qb6 21. Nh2 h6 22. Ng4 Rh8 23. Qf4 Qc7 24. Rac1 h5 25. Nf6 b6 26. Nxd7 Qxd7 27. Qf6+ Kg8 28. Na4 Rb8 29. Rd3 Kh7 30. Rc3 Rf8 31. Bxg6+ Kg8 32. Bxh5 Kh7 33. Rc7 Qe8 34. Bxf7 1-0

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.17"]
[Round "4"]
[White "Jahrke, Jonas"]
[Black "Rempe, Jonas"]
[Result "0-1"]
[ECO "C58"]
[WhiteElo "1417"]
[BlackElo "1245"]
[PlyCount "76"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Qf3 Be7 9. Bxc6+ Nxc6 10. Qxc6+ Bd7 11. Qc4 0-0 12. Nc3 Rc8 13. Qe2 h6 14. Nf3 Re8 15. d3 Bc6 16. 0-0 Bd6 17. Be3 e4 18. dxe4 Nxe4 19. Nxe4 Rxe4 20. Rad1 Qf6 21. Rd4 Rce8 22. c3 Qg6 23. Rfd1 Bc7 24. Rxe4 Rxe4 25. Qd3 f5 26. h3 Ra4 27. a3 Bxf3 28. Qf1 Bxd1 29. Qxd1 Rh4 30. c4 Kh7 31. Qf3 f4 32. Bd4 Bb6 33. Be5 Rh5 34. Bxf4 Rf5 35. b4 Bc7 36. c5 Rxf4 37. Qb7 Qb1+ 38. Kh2 Rf7+ 0-1

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.17"]
[Round "5"]
[White "Reuker, Ronja"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1132"]
[BlackElo "1417"]
[PlyCount "48"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Bd3 b5 7. a3 Bb7 8. 0-0 Nf6 9. Re1 d6 10. Bg5 Nbd7 11. Bh4 Be7 12. Bg3 0-0 13. Qe2 Rac8 14. e5 dxe5 15. Bxe5 Nxe5 16. Qxe5 Bd6 17. Qe3 Bxh2+ 18. Kh1 h6 19. Ne4 Nd5 20. Qf3 Be5 21. c3 Bxd4 22. cxd4 Qf4 23. Qxf4 Nxf4 24. Re3 Nxd3 0-1

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.16"]
[Round "3"]
[White "Kalina, Lena"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1177"]
[BlackElo "1417"]
[PlyCount "232"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 0-0 5. Bg5 c5 6. dxc5 Qa5 7. Qc2 Qxc5 8. e4 d6 9. Be2 Bg4 10. Be3 Qc7 11. 0-0 Nbd7 12. h3 Bxf3 13. Nb5 Qc8 14. Bxf3 Ne5 15. Be2 a6 16. Nd4 Qd7 17. f4 Nc6 18. Nf3 Rac8 19. e5 dxe5 20. fxe5 Ne8 21. Bf4 Nd4 22. Rad1 Nxe2+ 23. Qxe2 Qc6 24. b3 Nc7 25. Nd4 Qe8 26. e6 Bxd4+ 27. Rxd4 Nxe6 28. Re4 Nxf4 29. Rfxf4 e6 30. Qf3 Qc6 31. Rf6 Rcd8 32. Qe2 Qd6 33. Qf2 Qd1+ 34. Kh2 Qd2 35. Re2 Qd6+ 36. Kg1 Qd4 37. Re3 Kg7 38. Rf4 Qd1+ 39. Re1 Qd2 40. Re2 Qd6 41. Re1 b6 42. Kh1 Qc5 43. Qf3 Rd4 44. Rf6 Qe7 45. Rf1 Rd7 46. Rf4 Rfd8 47. Qc3+ Kg8 48. Qf3 Rf8 49. Qf2 Qc5 50. Qf3 a5 51. Qc3 Qb4 52. Qe5 Qd6 53. Qb5 Rc7 54. Qg5 Rc5 55. Qg4 Qd7 56. Rd4 Qe7 57. Rfd1 Rcc8 58. Rd7 Qf6 59. R7d6 Rb8 60. Qe2 Rfd8 61. Qd2 Rdc8 62. Qe3 Rd8 63. Qd2 Rf8 64. Qe3 Qb2 65. R1d2 Qc1+ 66. Kh2 Rfe8 67. Qf2 Qc3 68. R2d3 Qe5+ 69. Kh1 Qc5 70. Qf6 Qf5 71. Qd4 e5 72. Qe3 Qf1+ 73. Kh2 Qf4+ 74. Qxf4 exf4 75. Rf6 Re2 76. a3 Re3 77. Rxe3 fxe3 78. Rf1 e2 79. Re1 Re8 80. Kg3 Re3+ 81. Kf2 Rxb3 82. Rxe2 Rxa3 83. Re8+ Kg7 84. Rb8 Ra4 85. Rxb6 Rxc4 86. Ra6 Ra4 87. Kf3 f5 88. g3 Ra1 89. Kf4 a4 90. Kg5 Ra3 91. Ra7+ Kf8 92. Kh4 h6 93. Ra8+ Ke7 94. Ra7+ Kd8 95. Rh7 g5+ 96. Kh5 Rxg3 97. Ra7 Rxh3+ 98. Kg6 f4 99. Rxa4 Kc7 100. Ra7+ Kb6 101. Rf7 Kc5 102. Kf5 Kd4 103. Kg4 Rg3+ 104. Kh5 f3 105. Kxh6 Ke3 106. Re7+ Kf2 107. Rf7 Kg2 108. Kh5 f2 109. Ra7 f1Q 110. Ra6 Rh3+ 111. Kg6 Qxa6+ 112. Kf5 Rf3+ 113. Kg4 Qe6+ 114. Kh5 Rh3+ 115. Kxg5 Rg3+ 116. Kf4 Rg4# 0-1

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.15"]
[Round "2"]
[White "Jahrke, Jonas"]
[Black "Winterberg, Martin"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "1417"]
[BlackElo "1046"]
[PlyCount "48"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 Nh5 7. Ng5 Nxe5 8. Qxh5 Qe7 9. Be2 d3 10. 0-0 dxe2 11. Qxe2 0-0 12. Qh5 h6 13. Ne4 b6 14. Nxc5 Qxc5 15. Be3 Qd5 16. f4 Bb7 17. Qh3 Nc4 18. Bc1 Rfe8 19. b3 Re2 20. Qf3 Qc5+ 21. Be3 Rxe3 22. Qf2 Re2 23. Qxc5 Rxg2+ 24. Kh1 Rg4+ 0-1

[Event "GER-ch U25-B"]
[Site "Willingen"]
[Date "2016.05.15"]
[Round "1"]
[White "Ott, Linda"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1057"]
[BlackElo "1417"]
[PlyCount "66"]
[EventDate "2016.05.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 172 Extra"]
[Source "ChessBase"]
[SourceDate "2016.06.21"]
[SourceVersion "1"]
[SourceVersionDate "2016.06.21"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 a6 4. Bc4 b5 5. Be2 Bb7 6. d3 Qc7 7. Be3 d6 8. Nf3 Nd7 9. e5 dxe5 10. fxe5 Nxe5 11. Nxe5 Qxe5 12. Qd2 Qc7 13. d4 c4 14. Bf4 Bd6 15. Bxd6 Qxd6 16. Bf3 Bxf3 17. gxf3 Nf6 18. Ne4 Nxe4 19. fxe4 0-0 20. Rg1 Rad8 21. e5 Qxd4 22. Qxd4 Rxd4 23. a3 Re4+ 24. Kf1 Rxe5 25. Re1 Rxe1+ 26. Kxe1 Rd8 27. Ke2 f5 28. Ke3 Kf7 29. Kf4 Rd2 30. b4 Rxc2 31. h4 Kf6 32. h5 Rc3 33. Rg5 e5# 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.30"]
[Round "11"]
[White "Jahrke, Jonas"]
[Black "Kirchner, Markus"]
[Result "0-1"]
[ECO "E68"]
[WhiteElo "1372"]
[BlackElo "1594"]
[PlyCount "116"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d6 3. Bg2 Nbd7 4. 0-0 g6 5. d4 Bg7 6. c4 0-0 7. Nc3 e5 8. dxe5 dxe5 9. e4 c6 10. b4 a5 11. b5 Qc7 12. a4 cxb5 13. Nxb5 Qxc4 14. Ba3 Nxe4 15. Bxf8 Bxf8 16. Rc1 Qa2 17. Nxe5 Nxe5 18. Bxe4 Bg4 19. Qd5 Qxd5 20. Bxd5 Bb4 21. Rc7 Re8 22. f4 Nd7 23. Rfc1 b6 24. Bc6 Bc5+ 25. Kf1 Re7 26. Bxd7 Bxd7 27. R1xc5 bxc5 28. Rxc5 Bh3+ 29. Kf2 Bg4 30. Nc3 Ra7 31. Ne4 Kg7 32. Nc3 Bd7 33. Nb5 Ra6 34. Nc7 Rc6 35. Rxc6 Bxc6 36. Nb5 Kf6 37. Ke3 Ke6 38. Nd4+ Kd5 39. Nxc6 Kxc6 40. Kd3 Kc5 41. Kc3 h5 42. h3 f6 43. g4 h4 44. f5 gxf5 45. gxf5 Kd5 46. Kb3 Kd4 47. Kb2 Kc4 48. Kc2 Kd4 49. Kb3 Kd3 50. Kb2 Ke3 51. Kc3 Kf4 52. Kc4 Kg3 53. Kb5 Kxh3 54. Kxa5 Kg4 55. Kb6 h3 56. a5 h2 57. a6 h1Q 58. Ka7 Qc6 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.29"]
[Round "9"]
[White "Jahrke, Jonas"]
[Black "Huo, Da"]
[Result "1/2-1/2"]
[ECO "A37"]
[WhiteElo "1372"]
[BlackElo "1179"]
[PlyCount "88"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. 0-0 0-0 5. c4 c5 6. Nc3 Nc6 7. e3 e6 8. d4 cxd4 9. exd4 d5 10. cxd5 Nxd5 11. Be3 Nce7 12. Rc1 Bd7 13. Qd2 Nxe3 14. fxe3 Bc6 15. Ne2 Qd7 16. Rfd1 Rfd8 17. Rc2 Rac8 18. Nf4 Nd5 19. Nd3 Ne7 20. Nde5 Bxe5 21. Nxe5 Qe8 22. Nxc6 Nxc6 23. Rf1 e5 24. d5 f5 25. Qe1 Ne7 26. Rxc8 Rxc8 27. d6 Nc6 28. Rf2 e4 29. a3 a6 30. Rd2 Qd7 31. Bf1 b5 32. a4 Na7 33. axb5 axb5 34. b4 Rb8 35. Qa1 Rd8 36. Qa2+ Qf7 37. Qxf7+ Kxf7 38. Ra2 Rd7 39. Ra6 Kf6 40. Kf2 h6 41. Bh3 h5 42. Bf1 g5 43. h4 g4 44. Be2 Ke5 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.29"]
[Round "10"]
[White "Volk, Oskar"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1078"]
[BlackElo "1372"]
[PlyCount "96"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. f4 a6 4. Nf3 Qc7 5. d3 d6 6. g3 b5 7. Bg2 Bb7 8. Be3 Nd7 9. 0-0 Be7 10. Qe1 Ngf6 11. Bf2 Nb6 12. f5 exf5 13. exf5 0-0 14. Be3 Rfe8 15. Qd2 Rad8 16. d4 c4 17. Rae1 d5 18. Bf4 Qc8 19. Bh3 Bb4 20. Ne5 Ne4 21. Qe3 Bxc3 22. bxc3 f6 23. Nf3 Nxg3 24. Qf2 Nxf1 25. Rxf1 Re4 26. Qg3 Rde8 27. Bh6 Qd7 28. Rf2 Kh8 29. Bf4 Re2 30. Rxe2 Rxe2 31. Ne1 Qe8 32. Kf1 h6 33. Qf3 Rxe1+ 34. Kf2 Qe4 35. Qh5 Qe8 36. Qf3 Ra1 37. Bg4 Qe1+ 38. Kg2 Qh1+ 39. Kg3 Qxf3+ 40. Kxf3 Rxa2 41. Bh5 Rxc2 42. Bg6 Rxc3+ 43. Kg4 b4 44. Bd6 b3 45. Bc5 b2 46. Bxb6 b1Q 47. Bc7 Qd1+ 48. Kh4 Qxd4+ 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.28"]
[Round "8"]
[White "Zwecker, Hagen"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "1145"]
[BlackElo "1372"]
[PlyCount "132"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d3 Qc7 4. g3 b5 5. Bg2 d6 6. 0-0 Nf6 7. Bf4 Nbd7 8. Re1 Bb7 9. Nbd2 Be7 10. Nf1 0-0 11. e5 dxe5 12. Bxe5 Nxe5 13. Rxe5 Bxf3 14. Bxf3 Qxe5 15. Bxa8 Rxa8 16. c3 Rd8 17. Rc1 Qf5 18. d4 cxd4 19. cxd4 Qd5 20. Rc7 Bc5 21. Ne3 Qd6 22. Rxc5 Qxc5 23. dxc5 Rxd1+ 24. Nxd1 Kf8 25. Nc3 b4 26. Na4 Ke7 27. Kf1 Kd7 28. Ke2 Kc6 29. Kd3 Ng4 30. Kd4 Nxf2 31. a3 bxa3 32. bxa3 Ng4 33. h3 Nf2 34. h4 Nh1 35. g4 h6 36. Ke5 Nf2 37. g5 hxg5 38. hxg5 Nh3 39. g6 fxg6 40. Kxe6 Nf4+ 41. Kf7 g5 42. Nc3 g4 43. Ne4 Kd5 44. Ng3 Kxc5 45. Kxg7 Kd4 46. Kf6 Ke3 47. Ke7 Kf3 48. Nf5 Ne2 49. Kd7 Kf4 50. Nh4 g3 51. Kc7 Kg4 52. Ng2 Kh3 53. Ne1 Kh2 54. Kb7 a5 55. Kb6 Kg1 56. Kxa5 Kf2 57. Nd3+ Ke3 58. Ne1 Nf4 59. a4 Ke2 60. Kb6 Kxe1 61. a5 g2 62. a6 g1Q+ 63. Kb7 Qg7+ 64. Ka8 Nd5 65. a7 Nb6+ 66. Kb8 Kd2 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.27"]
[Round "6"]
[White "Butenandt, Svenja"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "1126"]
[BlackElo "1372"]
[PlyCount "75"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Qc7 6. Qe2 d6 7. c4 Nd7 8. Nc3 Ngf6 9. f4 Be7 10. 0-0 0-0 11. Bd2 Qb6 12. Be3 Nc5 13. Nf3 Qc7 14. e5 dxe5 15. fxe5 Nxd3 16. exf6 Bxf6 17. Qxd3 Bd7 18. Ng5 Bxg5 19. Bxg5 Rac8 20. Be7 Rfe8 21. Bh4 Bc6 22. b3 e5 23. Rae1 Re6 24. Bg3 Rg6 25. Nd5 Qd6 26. Bxe5 Bxd5 27. Qxd5 Qxd5 28. cxd5 Rc2 29. d6 Rgxg2+ 30. Kh1 Rgd2 31. Bf4 Re2 32. Rxe2 Rxe2 33. d7 g5 34. d8Q+ Kg7 35. Qxg5+ Kf8 36. Qd8+ Kg7 37. Rg1+ Rg2 38. Rxg2# 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.27"]
[Round "7"]
[White "Jahrke, Jonas"]
[Black "Stillbauer, Jan"]
[Result "1/2-1/2"]
[ECO "D51"]
[WhiteElo "1372"]
[BlackElo "1146"]
[PlyCount "139"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. cxd5 exd5 6. Nf3 c6 7. g3 Qa5 8. Bd2 Be7 9. Bg2 0-0 10. 0-0 Qc7 11. Rc1 a6 12. Qc2 Re8 13. Rfe1 Nb6 14. Bf4 Qd8 15. b3 Bg4 16. h3 Bxf3 17. Bxf3 Rc8 18. Bg2 c5 19. dxc5 Bxc5 20. Qb1 Qe7 21. e3 Bb4 22. Qd3 Rc6 23. Red1 Rec8 24. Ne2 Rxc1 25. Rxc1 Rxc1+ 26. Nxc1 Qc5 27. Ne2 h6 28. Be5 Nfd7 29. Bd4 Qd6 30. Bxb6 Nxb6 31. Nf4 Qc5 32. Nxd5 Nxd5 33. Qxd5 Qxd5 34. Bxd5 b6 35. Kf1 Kf8 36. Ke2 Ke7 37. g4 f6 38. f4 Kd6 39. Bc4 b5 40. Bf7 Ke7 41. Bd5 Kd6 42. Bf3 g6 43. Kd3 f5 44. e4 fxe4+ 45. Kxe4 Ke6 46. Ke3 Kd6 47. Be4 g5 48. f5 Bc5+ 49. Kd3 Ke5 50. Bb7 a5 51. Ke2 Kd6 52. Kf3 Ke5 53. Kg3 Ba3 54. h4 Bc5 55. hxg5 hxg5 56. Ba6 b4 57. Kf3 Kd5 58. Bc4+ Ke5 59. Kg2 Bd4 60. Kf1 Kf4 61. Be2 Ke5 62. Ke1 Ke4 63. Kd2 Ke5 64. Kd3 Kd5 65. Bf3+ Kc5 66. Ke4 Bf6 67. Be2 Kd6 68. Bc4 Bg7 69. Be6 Bf6 70. Bg8 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.26"]
[Round "5"]
[White "Jahrke, Jonas"]
[Black "Bress, Aaron"]
[Result "1/2-1/2"]
[ECO "A38"]
[WhiteElo "1372"]
[BlackElo "1477"]
[PlyCount "113"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. Nf3 c5 2. g3 Nc6 3. c4 g6 4. Bg2 Bg7 5. 0-0 Nf6 6. Nc3 0-0 7. d3 d6 8. Qc2 Bg4 9. h3 Bxf3 10. exf3 Qd7 11. Be3 Rab8 12. a3 a6 13. f4 Rfc8 14. Rab1 b5 15. Rfe1 e6 16. b3 Ne7 17. Ne4 Nxe4 18. dxe4 Qc7 19. Red1 b4 20. a4 Nc6 21. Rd3 Nd4 22. Bxd4 Bxd4 23. Rbd1 a5 24. Kf1 Rf8 25. Qe2 f6 26. Qg4 Qd7 27. h4 Qf7 28. h5 Kh8 29. hxg6 hxg6 30. Ke2 Kg7 31. Rh1 Rh8 32. Rdd1 Rbg8 33. Bh3 Re8 34. Bg2 Reg8 35. Rh3 Rxh3 36. Bxh3 f5 37. exf5 exf5 38. Qf3 Qe6+ 39. Kf1 Re8 40. Kg2 Qe2 41. Rd3 Re7 42. Qxe2 Rxe2 43. Rf3 Kf6 44. Kf1 Rb2 45. g4 Rc2 46. g5+ Ke6 47. Ke1 Rb2 48. Bg2 Ra2 49. Bf1 d5 50. Be2 Ra1+ 51. Kd2 Ra2+ 52. Kd1 dxc4 53. Bxc4+ Kd6 54. Ke1 Ke7 55. Kf1 Ra1+ 56. Kg2 Ra2 57. Kg3 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.25"]
[Round "4"]
[White "Baltic, Sara"]
[Black "Jahrke, Jonas"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "1129"]
[BlackElo "1372"]
[PlyCount "114"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 e6 3. Nf3 a6 4. d4 cxd4 5. Nxd4 Qc7 6. g3 b5 7. a3 Bb7 8. Bg2 Nf6 9. 0-0 d6 10. Be3 Be7 11. f4 Nbd7 12. Kh1 0-0 13. g4 Nb6 14. b3 Qxc3 15. Qd2 Qxd2 16. Bxd2 Nxe4 17. Bc1 Nc5 18. Be3 Bxg2+ 19. Kxg2 Nd5 20. Rfe1 Nxe3+ 21. Rxe3 Bf6 22. c3 Bxd4 23. cxd4 Nd7 24. Rc1 Rac8 25. Rec3 Rxc3 26. Rxc3 e5 27. Rc7 Rd8 28. Rc6 Nb8 29. Rc2 exf4 30. h4 h6 31. g5 hxg5 32. hxg5 Kh7 33. Kf3 Nd7 34. Kxf4 f6 35. Re2 fxg5+ 36. Kxg5 Nf6 37. b4 Re8 38. Rh2+ Kg8 39. Kg6 Re6 40. Kf5 Kf7 41. Rf2 g6+ 42. Kg5 Ke7 43. Rf3 Ne4+ 44. Kh6 g5+ 45. Kg7 Rf6 46. Rh3 g4 47. Rh4 Rf7+ 48. Kg6 Rf6+ 49. Kg7 Nf2 50. Kg8 g3 51. Rh7+ Ke6 52. Rg7 Rf3 53. Rg5 Ne4 54. d5+ Kf6 55. Rg7 Rf2 56. Kh7 Ng5+ 57. Kh6 Rh2# 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.25"]
[Round "3"]
[White "Jahrke, Jonas"]
[Black "Reuter, Elisa"]
[Result "1/2-1/2"]
[ECO "A84"]
[WhiteElo "1372"]
[BlackElo "1133"]
[PlyCount "66"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 f5 4. Nf3 Nf6 5. Bf4 Be7 6. e3 c6 7. Bd3 Nbd7 8. 0-0 0-0 9. c5 Ne4 10. Qc2 Ndf6 11. h3 Bd7 12. b4 Nh5 13. Bh2 Qe8 14. a3 Nhf6 15. Rab1 Nxc3 16. Qxc3 Ne4 17. Qc2 a6 18. Nd2 Qg6 19. Be2 Rac8 20. Rfc1 Bh4 21. Nxe4 fxe4 22. Rf1 e5 23. Bg4 Bxg4 24. hxg4 exd4 25. exd4 Qxg4 26. Rbe1 Rce8 27. Qe2 Qxe2 28. Rxe2 Bf6 29. Rd1 Bg5 30. Bd6 Rf7 31. f3 e3 32. Rdd2 h6 33. Rd1 Bf4 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.24"]
[Round "2"]
[White "Bui, Bao Anh Le"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "B82"]
[WhiteElo "1656"]
[BlackElo "1372"]
[PlyCount "105"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. a3 d6 7. Be2 Be7 8. Be3 Nd7 9. f4 Ngf6 10. 0-0 0-0 11. Bf3 Rb8 12. a4 Re8 13. Qe1 Bf8 14. a5 g6 15. Qh4 Bg7 16. Be2 Nc5 17. Bd3 Nxd3 18. cxd3 Bd7 19. Rf3 e5 20. Nde2 Bg4 21. Rf2 Qd7 22. h3 Be6 23. fxe5 dxe5 24. Bg5 Nh5 25. g4 h6 26. gxh5 hxg5 27. Qxg5 gxh5 28. Rg2 f6 29. Qxh5 Bxh3 30. Rg3 Be6 31. Rf1 Rf8 32. Rf2 Qf7 33. Rxg7+ Qxg7+ 34. Rg2 Qxg2+ 35. Kxg2 Rf7 36. Kf2 Re8 37. Ke3 Ree7 38. Ng3 Rh7 39. Qf3 Rh3 40. Nce2 Rg7 41. Kd2 Bg4 42. Qxf6 Rh2 43. Qxe5 Bxe2 44. Qe8+ Kh7 45. Nxe2 Rgg2 46. Qf7+ Kh8 47. Qf3 Kg7 48. Ke3 Kg8 49. e5 Rg6 50. Nf4 Rg7 51. e6 Rxb2 52. Ng6 Rxg6 53. Qf7+ 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2015.05.24"]
[Round "1"]
[White "Jahrke, Jonas"]
[Black "Sklarski, Lior"]
[Result "1-0"]
[ECO "A84"]
[WhiteElo "1372"]
[BlackElo "1087"]
[PlyCount "71"]
[EventDate "2015.05.24"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 166 Extra"]
[Source "ChessBase"]
[SourceDate "2015.06.18"]
[SourceVersion "1"]
[SourceVersionDate "2015.06.18"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 f5 4. Nf3 Nd7 5. cxd5 exd5 6. Nxd5 Ngf6 7. Bg5 h6 8. Nxf6+ Nxf6 9. Bxf6 Qxf6 10. e3 Bb4+ 11. Nd2 0-0 12. Qb3+ Kh8 13. Qxb4 a5 14. Qc5 b6 15. Qxc7 Rf7 16. Qe5 Qd8 17. Bc4 Re7 18. Qd5 Rd7 19. Qxa8 f4 20. Be6 Rc7 21. Qd5 Qe8 22. Bxc8 Rxc8 23. Qe4 Qb5 24. Qb7 Rf8 25. Nb3 fxe3 26. fxe3 Qd3 27. Qe7 Qf5 28. 0-0-0 Rc8+ 29. Nc5 bxc5 30. d5 Rb8 31. Rhf1 Qc8 32. d6 Kh7 33. Rf7 Qa6 34. Rxg7+ Kh8 35. Rh7+ Kg8 36. Qg7# 1-0

[Event "Solingen Karneval op"]
[Site "Solingen"]
[Date "2014.03.02"]
[Round "5"]
[White "Lehmann, Tornalf"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "C24"]
[WhiteElo "1645"]
[PlyCount "39"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nxe4 5. Qxd4 Nf6 6. 0-0 Nc6 7. Qh4 d5 8. Bb5 a6 9. Ba4 Bd7 10. Bg5 Be7 11. Re1 b5 12. Bb3 Ne4 13. Bxd5 Nxg5 14. Nxg5 f6 15. Nf7 g5 16. Qh5 Qb8 17. Nxh8+ Kd8 18. Nf7+ Kc8 19. Qxh7 Nd4 20. Qg8+ 1-0

[Event "Solingen Karneval op"]
[Site "Solingen"]
[Date "2014.03.02"]
[Round "4"]
[White "Rieger, Isabelle"]
[Black "Jahrke, Jonas"]
[Result "1-0"]
[ECO "D77"]
[WhiteElo "1692"]
[PlyCount "61"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nc6 3. c4 e6 4. Nc3 Nf6 5. g3 g6 6. Bg2 Bg7 7. 0-0 0-0 8. Bf4 dxc4 9. e4 Ng4 10. e5 f6 11. exf6 Qxf6 12. h3 Nh6 13. Qd2 Rd8 14. Bxh6 Nxd4 15. Nxd4 Rxd4 16. Qc1 Bxh6 17. Qxh6 b5 18. Bxa8 e5 19. Nxb5 Rd3 20. Rad1 Rf3 21. Bxf3 c5 22. Bd5+ Kh8 23. Be4 c3 24. bxc3 c4 25. Rd6 Qe7 26. Rfd1 Be6 27. Rxe6 Qxe6 28. Rd8+ Qg8 29. Rxg8+ Kxg8 30. Bd5+ Kh8 31. Qf8# 1-0

[Event "Solingen Karneval op"]
[Site "Solingen"]
[Date "2014.03.01"]
[Round "2"]
[White "Heyn, Peter"]
[Black "Jahrke, Jonas"]
[Result "1/2-1/2"]
[ECO "D56"]
[WhiteElo "1886"]
[PlyCount "40"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nc6 4. Nf3 Nf6 5. Bg5 Be7 6. e3 h6 7. Bh4 0-0 8. a3 a6 9. Qc2 Ng4 10. Bg3 b6 11. cxd5 exd5 12. Bd3 Nf6 13. Rc1 Bb7 14. h3 Re8 15. 0-0 Bd6 16. Ne2 Bxg3 17. Nxg3 Rc8 18. Qe2 Ne4 19. Bxe4 dxe4 20. Nd2 Na7 1/2-1/2

[Event "Solingen Karneval op"]
[Site "Solingen"]
[Date "2014.03.01"]
[Round "3"]
[White "Jahrke, Jonas"]
[Black "Bigott, Martin"]
[Result "0-1"]
[ECO "B07"]
[BlackElo "1890"]
[PlyCount "72"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. e4 Nf6 2. Nc3 d6 3. d4 d5 4. e5 Nfd7 5. Qh5 e6 6. Bg5 Be7 7. Nf3 h6 8. Bxe7 Qxe7 9. g4 a6 10. g5 g6 11. Qh4 c5 12. 0-0-0 Nc6 13. a3 cxd4 14. Ne2 Ndxe5 15. Nexd4 Nxf3 16. Nxf3 Bd7 17. Bg2 0-0-0 18. Rhe1 hxg5 19. Qg3 Qf6 20. Rd3 Qf4+ 21. Qxf4 gxf4 22. Ng5 Rxh2 23. Nxf7 Rf8 24. Rf3 Rxf7 25. Bh3 e5 26. Bxd7+ Kxd7 27. Rd1 Ke6 28. Rfd3 Rxf2 29. Rxd5 Nd4 30. Kb1 Kxd5 31. c3 Rc7 32. c4+ Rxc4 33. b4 Rcc2 34. Ka1 Ke6 35. b5 Nb3+ 36. Kb1 Rb2# 0-1

[Event "Solingen Karneval op"]
[Site "Solingen"]
[Date "2014.02.28"]
[Round "1"]
[White "Jahrke, Jonas"]
[Black "Meckel, Helmut"]
[Result "1/2-1/2"]
[ECO "D37"]
[BlackElo "1820"]
[PlyCount "87"]
[EventDate "2014.02.28"]
[EventType "swiss"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2016"]
[Source "ChessBase"]
[SourceDate "2015.10.08"]
[SourceVersion "1"]
[SourceVersionDate "2015.10.08"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 Nf6 3. Nf3 d5 4. cxd5 exd5 5. d4 a6 6. Bg5 Be7 7. Qb3 c6 8. g3 a5 9. Bg2 b5 10. e3 a4 11. Qc2 Ba6 12. 0-0 b4 13. Ne2 Nbd7 14. Rfe1 Bb5 15. Nf4 Ne4 16. Bxe7 Qxe7 17. a3 b3 18. Qc1 g5 19. Ne2 h5 20. Nc3 Rb8 21. Nxb5 cxb5 22. Nd2 0-0 23. Nxe4 dxe4 24. Qb1 f5 25. Qd1 Rfc8 26. Qxh5 Rc6 27. Rac1 Rbc8 28. Rxc6 Rxc6 29. g4 Rc2 30. Rb1 Qf6 31. gxf5 Qxf5 32. f3 exf3 33. Qxf3 Rxg2+ 34. Kxg2 Qxb1 35. Qd5+ Kf8 36. Qxd7 Qxb2+ 37. Kf3 Qxa3 38. Qf5+ Ke8 39. Qc8+ Kf7 40. Qc7+ Ke8 41. Qc8+ Ke7 42. Qc7+ Ke6 43. Qe5+ Kd7 44. Qxb5+ 1/2-1/2

