[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.27"]
[Round "7"]
[White "Kappeler, Georg"]
[Black "Koch, Mika Jonas"]
[Result "1/2-1/2"]
[ECO "A36"]
[WhiteElo "1783"]
[BlackElo "1644"]
[PlyCount "23"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. e4 c5 2. c4 Nc6 3. Nc3 d6 4. g3 g6 5. Bg2 Bg7 6. Nge2 Be6 7. d3 Qd7 8. 0-0 Bh3 9. Be3 Bxg2 10. Kxg2 Nf6 11. h3 0-0 12. Qd2 1/2-1/2

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.27"]
[Round "6"]
[White "Koch, Mika Jonas"]
[Black "Alkayas, Shadi"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "1644"]
[BlackElo "1866"]
[PlyCount "62"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bb4+ 5. c3 dxc3 6. bxc3 Ba5 7. 0-0 d6 8. e5 Be6 9. Bxe6 fxe6 10. exd6 Qxd6 11. Qb3 0-0-0 12. Nbd2 Qd5 13. c4 Qd3 14. Qb5 a6 15. Qg5 Bc3 16. Rb1 Bf6 17. Qf4 Nh6 18. Rb3 Qf5 19. Ne4 Nd4 20. Nxd4 Bxd4 21. Ng5 Qxf4 22. Bxf4 e5 23. Be3 Rd7 24. Nf3 Nf5 25. Bxd4 exd4 26. Rfb1 c5 27. Ne5 Rc7 28. Nc6 Rxc6 29. Rxb7 Rd8 30. Rb8+ Kd7 31. R8b7+ Rc7 0-1

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.26"]
[Round "5"]
[White "Hessler Carbonell, Louis"]
[Black "Koch, Mika Jonas"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "1903"]
[BlackElo "1644"]
[PlyCount "47"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. f4 Nf6 2. Nf3 d5 3. e3 c5 4. b3 g6 5. Bb2 Bg7 6. Be2 0-0 7. Ne5 Nbd7 8. d4 Nxe5 9. dxe5 Ne4 10. 0-0 e6 11. Nd2 Nxd2 12. Qxd2 Qb6 13. c4 dxc4 14. Bxc4 Rd8 15. Qc2 Bd7 16. Rad1 Bc6 17. Rd6 Rxd6 18. exd6 Bxb2 19. Qxb2 Be4 20. Qe5 Qc6 21. Rf2 Rd8 22. Rd2 a6 23. Bxe6 fxe6 24. Qxe6+ 1-0

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.26"]
[Round "4"]
[White "Koch, Mika Jonas"]
[Black "Derr, Oleg"]
[Result "0-1"]
[ECO "D79"]
[WhiteElo "1644"]
[BlackElo "2033"]
[PlyCount "46"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 0-0 5. Bg2 c6 6. 0-0 d5 7. cxd5 cxd5 8. Nc3 Nc6 9. Bf4 Ne4 10. Rc1 Qa5 11. a3 Bf5 12. e3 f6 13. h4 Nxc3 14. Rxc3 e5 15. dxe5 fxe5 16. Bg5 h6 17. Qb3 hxg5 18. Qxb7 e4 19. Rxc6 exf3 20. Bxf3 Rab8 21. Qe7 Rbe8 22. Qxg5 Re5 23. Rd1 Be4 0-1

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.25"]
[Round "2"]
[White "Koch, Mika Jonas"]
[Black "Petrosino, Julian"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1644"]
[BlackElo "1834"]
[PlyCount "59"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. g3 e6 4. Bg2 c5 5. c3 Nc6 6. 0-0 cxd4 7. cxd4 Be7 8. Nc3 0-0 9. a3 Bd7 10. Re1 Rc8 11. Bf4 Na5 12. Ne5 Qb6 13. Rb1 Rfd8 14. e3 Nc4 15. Nxc4 Rxc4 16. Bf1 Rcc8 17. Bd3 h6 18. Kh1 Bc6 19. Rg1 Ne4 20. Bxe4 dxe4 21. Qh5 Qb3 22. g4 g5 23. Be5 Bf8 24. Bf6 Rd7 25. h4 gxh4 26. g5 Rd5 27. Nxd5 Qxd5 28. gxh6+ Kh7 29. Qxf7+ Kxh6 30. Qg6# 1-0

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.25"]
[Round "3"]
[White "Montermann, Klaus"]
[Black "Koch, Mika Jonas"]
[Result "0-1"]
[ECO "B19"]
[WhiteElo "2016"]
[BlackElo "1644"]
[PlyCount "74"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. e4 c6 2. Nc3 d5 3. d4 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nf6 7. h4 h6 8. Bd3 Bxd3 9. Qxd3 e6 10. Bd2 Bd6 11. Ne4 Nxe4 12. Qxe4 Nd7 13. c4 Nf6 14. Qe2 Qe7 15. a3 a5 16. Bc3 0-0 17. Ne5 Bb4 18. g4 Bxc3+ 19. bxc3 g6 20. Qe3 Kg7 21. g5 hxg5 22. hxg5 Nh5 23. c5 Rh8 24. Rg1 Rh7 25. Rb1 Rah8 26. Rb6 Rc8 27. Nc4 Kg8 28. Nxa5 Ra8 29. Rxb7 Qd8 30. Nxc6 Qe8 31. Ne7+ Kf8 32. Nxg6+ Kg7 33. Ne5 Rxa3 34. Rg4 Qa4 35. Rb1 Ng3 36. Rxg3 Qc2 37. Qf3 Rh1+ 0-1

[Event "Marburg op"]
[Site "Marburg"]
[Date "2024.10.24"]
[Round "1"]
[White "Ward, Cian"]
[Black "Koch, Mika Jonas"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "1941"]
[BlackElo "1644"]
[PlyCount "57"]
[EventDate "2024.10.24"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CB16_2025"]
[SourceDate "2025.04.16"]
[SourceVersion "1"]
[SourceVersionDate "2025.04.16"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 d5 4. exd5 Qxd5 5. Na3 Bg7 6. Bc4 Qe4+ 7. Kf1 e6 8. d3 Qf5 9. Nb5 Kd8 10. Nd6 Qh5 11. Nxf7+ Ke8 12. Nxh8 Bxh8 13. Qe2 Nc6 14. Bxe6 Nge7 15. Bxc8 Rxc8 16. Ng5 Ne5 17. Qxh5 gxh5 18. Ke2 Kd7 19. Ne4 Nf5 20. Nxc5+ Rxc5 21. d4 Rb5 22. dxe5 Rxe5+ 23. Be3 Rb5 24. Rhd1+ Kc6 25. Rd2 Nd6 26. Bd4 Bxd4 27. cxd4 Ne4 28. Rc2+ Kd5 29. f3 1-0

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.26"]
[Round "7"]
[White "Koch, Mika Jonas"]
[Black "Karres, David Tobias"]
[Result "1-0"]
[ECO "E51"]
[WhiteElo "1412"]
[BlackElo "1450"]
[PlyCount "61"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. Bd2 d5 5. e3 0-0 6. Nf3 Nbd7 7. Bd3 c5 8. 0-0 Ba5 9. Qc2 Bc7 10. Nb5 Bb8 11. cxd5 exd5 12. dxc5 Ne5 13. Nxe5 Bxe5 14. Bc3 Bxh2+ 15. Kxh2 Ng4+ 16. Kg3 Qg5 17. f4 Qe7 18. Bd4 Nxe3 19. Bxe3 Qxe3+ 20. Rf3 Qe6 21. Bxh7+ Kh8 22. Rh1 g6 23. Qc3+ f6 24. Bxg6+ Kg8 25. f5 Qe5+ 26. Qxe5 fxe5 27. Nd6 Bd7 28. Kg4 e4 29. Rfh3 Kg7 30. Kg5 Rh8 31. f6+ 1-0

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.26"]
[Round "6"]
[White "Reinhold, Guenther"]
[Black "Koch, Mika Jonas"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1665"]
[BlackElo "1412"]
[PlyCount "46"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Be2 d6 3. f4 Nc6 4. Nf3 Nf6 5. d3 g6 6. 0-0 Bg7 7. c3 0-0 8. Kh1 Qb6 9. Na3 Be6 10. Ng5 Bd7 11. Nc4 Qc7 12. Ne3 h6 13. Nf3 e6 14. Bd2 Rfe8 15. Rc1 e5 16. fxe5 Nxe5 17. Nxe5 Rxe5 18. Ng4 Nxg4 19. Bxg4 Rf8 20. Bf4 Re7 21. Bf3 Re6 22. d4 Qb6 23. dxc5 dxc5 1/2-1/2

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.25"]
[Round "5"]
[White "Koch, Mika Jonas"]
[Black "Plaumann, Finja"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1412"]
[BlackElo "1260"]
[PlyCount "83"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Bd3 Nf6 5. Nf3 Be7 6. Bf4 Nc6 7. c3 0-0 8. 0-0 Bd6 9. Bxd6 Qxd6 10. h3 Ne4 11. Nbd2 Nxd2 12. Qxd2 Ne7 13. Qc2 h6 14. Ne5 g6 15. Rad1 c5 16. Qd2 Kg7 17. Rfe1 cxd4 18. cxd4 Nc6 19. Bf1 Nxe5 20. Rxe5 Bd7 21. g3 Rae8 22. Rde1 Rxe5 23. Rxe5 f6 24. Re3 Qc7 25. Re7+ Rf7 26. Rxf7+ Kxf7 27. Qxh6 Qc2 28. Qh7+ Ke6 29. Qg8+ Ke7 30. Qxd5 Qxb2 31. Bg2 Qb1+ 32. Kh2 Qb2 33. Qc5+ Kd8 34. Qxa7 Qxf2 35. Qxb7 Qxa2 36. Qe4 Kc8 37. Qxg6 Bc6 38. Qf5+ Kc7 39. d5 Bb7 40. Qe6 Kb8 41. Qxf6 Ka7 42. h4 1-0

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.25"]
[Round "4"]
[White "Wiencken, Marcus"]
[Black "Koch, Mika Jonas"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "1232"]
[BlackElo "1412"]
[PlyCount "64"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bc4 Nc6 4. 0-0 Nf6 5. d3 g6 6. Ng5 e6 7. Nf3 Bg7 8. Bg5 h6 9. Bf4 0-0 10. Re1 a6 11. Bxd6 Qxd6 12. e5 Nxe5 13. Nxe5 Ng4 14. Qxg4 Bxe5 15. c3 Bxh2+ 16. Kh1 Be5 17. Nd2 Bg7 18. Re3 b5 19. Bb3 Bb7 20. Qh4 Bd5 21. Bd1 Kh7 22. Nf3 Rfe8 23. Ng5+ Kg8 24. Rg3 hxg5 25. Qxg5 Qe5 26. Qh4 Kf8 27. Bc2 Bf6 28. Qh7 Ke7 29. d4 cxd4 30. Bxg6 Rh8 31. Rh3 Rxh7 32. Rxh7 Rh8 0-1

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.24"]
[Round "2"]
[White "Culha, Merve"]
[Black "Koch, Mika Jonas"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "837"]
[BlackElo "1412"]
[PlyCount "82"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Nxd4 6. Bxd4 Bxd4 7. Qxd4 Qf6 8. e5 Qb6 9. Qc3 Ne7 10. Bc4 0-0 11. Nd2 Re8 12. f4 d5 13. Bb3 d4 14. Qg3 Nf5 15. Qd3 Ne3 16. Nc4 Qb4+ 17. Kf2 Nxc4 18. Qxc4 Qxc4 19. Bxc4 c5 20. Rhe1 Rb8 21. a4 Bf5 22. Re2 a6 23. a5 Re7 24. Kf3 h5 25. h3 Kf8 26. g4 Bg6 27. f5 Bh7 28. e6 fxe6 29. fxe6 hxg4+ 30. hxg4 Rc8 31. Kg3 g6 32. Rf1+ Kg7 33. g5 Bg8 34. Bd5 Rd8 35. Bc4 Rd6 36. Rf6 b5 37. axb6 Rxb6 38. b3 a5 39. Kf2 Re8 40. Ke1 Bh7 41. Rf7+ Kh8 1-0

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.24"]
[Round "3"]
[White "Koch, Mika Jonas"]
[Black "Vinogradov, Roman"]
[Result "0-1"]
[ECO "C72"]
[WhiteElo "1412"]
[BlackElo "1306"]
[PlyCount "80"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 4. 0-0 a6 5. Ba4 d6 6. c3 Bg4 7. h3 b5 8. hxg4 bxa4 9. Qxa4 g6 10. d4 Qd7 11. d5 Nb8 12. Qxd7+ Nxd7 13. Be3 Bg7 14. c4 0-0 15. Nc3 Nf6 16. Bg5 h6 17. Bxf6 Bxf6 18. Nd2 Rfc8 19. b3 Bg5 20. Nf3 Bf6 21. Rac1 c6 22. dxc6 Nxc6 23. Nd5 Bd8 24. Rfd1 a5 25. Rd2 Nb4 26. Nxb4 axb4 27. Rxd6 Rxa2 28. Nxe5 Bc7 29. Rc6 Rb2 30. Nd7 Rxb3 31. Nf6+ Kg7 32. Rd1 Rc3 33. Nd5 Bh2+ 34. Kxh2 Rxc6 35. Nxc3 bxc3 36. Rc1 Rxc4 37. f3 Kf6 38. g3 Ke5 39. Kg2 Kd4 40. Kf2 Kd3 0-1

[Event "Heusenstamm Sparkassen op-B 9th"]
[Site "Heusenstamm"]
[Date "2023.11.23"]
[Round "1"]
[White "Koch, Mika Jonas"]
[Black "Fernandez Garcia, Alfonso Javier"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1412"]
[BlackElo "1600"]
[PlyCount "82"]
[EventDate "2023.11.23"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2025"]
[Source "ChessBase"]
[SourceDate "2024.10.14"]
[SourceVersion "1"]
[SourceVersionDate "2024.10.14"]
[SourceQuality "1"]

1. Nf3 Nf6 2. Nc3 g6 3. e4 d6 4. Bc4 Bg7 5. d3 0-0 6. Be3 Nbd7 7. h3 c6 8. a4 a5 9. Qd2 e5 10. 0-0 Nb6 11. Bh6 Nxc4 12. dxc4 Qe7 13. Bxg7 Kxg7 14. Qe3 Nd7 15. Rfd1 Nc5 16. Nd2 Be6 17. Rab1 f5 18. b4 axb4 19. Rxb4 f4 20. Qe2 Qc7 21. Rdb1 Ra7 22. R4b2 Rb8 23. Ra1 Rba8 24. Rab1 Bc8 25. Rd1 Nxa4 26. Nxa4 Rxa4 27. Nb3 Be6 28. c5 d5 29. Nd2 d4 30. Kh2 R4a5 31. Rdb1 Rb8 32. Nb3 Bxb3 33. Rxb3 Rxc5 34. Qd3 b5 35. c4 Qd7 36. cxb5 Rcxb5 37. Rxb5 Rxb5 38. Rc1 c5 39. Qc4 Ra5 40. Rb1 Qf7 41. Qd3 c4 0-1

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.29"]
[Round "6"]
[White "Heller, Alexander"]
[Black "Koch, Mika Jonas"]
[Result "1/2-1/2"]
[ECO "A05"]
[PlyCount "48"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. e4 c5 2. d3 d6 3. Nf3 Nc6 4. g3 g6 5. Bg2 Nf6 6. 0-0 Bg7 7. c3 0-0 8. Nbd2 e5 9. Re1 Re8 10. Nf1 h6 11. Ne3 Be6 12. Bd2 b5 13. b4 Qd7 14. a4 a6 15. a5 Bh3 16. Qc2 Bxg2 17. Kxg2 cxb4 18. cxb4 Rac8 19. Qb3 Red8 20. Rac1 Nd4 21. Nxd4 exd4 22. Nd5 Nxd5 23. Qxd5 Kh7 24. Bf4 Rc3 1/2-1/2

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.29"]
[Round "7"]
[White "Henzelmann, Matthias"]
[Black "Koch, Mika Jonas"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "1439"]
[PlyCount "100"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. Nf3 h6 6. Bh4 0-0 7. e3 b6 8. Qc2 Bb7 9. Be2 Nfd7 10. Bxe7 Qxe7 11. Qb3 dxc4 12. Bxc4 Nc6 13. a3 Na5 14. Qa2 Nxc4 15. Qxc4 Rac8 16. b4 Nf6 17. Ke2 Bd5 18. Nxd5 Nxd5 19. Rac1 a5 20. bxa5 Qxa3 21. axb6 cxb6 22. Qxc8 Rxc8 23. Rxc8+ Kh7 24. Rhc1 b5 25. Nd2 b4 26. Ke1 Qd3 27. Nb1 Qb3 28. Nd2 Qd3 29. Nb1 b3 30. Rb8 f5 31. Nd2 Nc3 32. Rxc3 Qxc3 33. Rxb3 Qc1+ 34. Ke2 Qg1 35. g3 Qxh2 36. Rb6 Qh5+ 37. Kd3 Qe8 38. Nc4 Qa4 39. Nd2 Qd7 40. Ke2 Qd5 41. Kf1 e5 42. Nb3 Qh1+ 43. Ke2 e4 44. Nd2 Qh5+ 45. Ke1 Qe8 46. Ke2 Qf8 47. Rb5 Qf7 48. Rc5 h5 49. f3 exf3+ 50. Nxf3 g6 1/2-1/2

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.28"]
[Round "5"]
[White "Koch, Mika Jonas"]
[Black "Rittel, Christoph"]
[Result "1/2-1/2"]
[ECO "A21"]
[PlyCount "107"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 f5 3. d3 Nf6 4. Nf3 d6 5. g3 c6 6. Bg2 Be7 7. Qc2 0-0 8. 0-0 Na6 9. a3 Qe8 10. Re1 Qg6 11. Bd2 f4 12. Rac1 fxg3 13. fxg3 Nh5 14. d4 Qg4 15. Qe4 Qxe4 16. Nxe4 Nf6 17. Nxf6+ gxf6 18. e4 Be6 19. d5 cxd5 20. cxd5 Bd7 21. Be3 Nc5 22. Bxc5 dxc5 23. Red1 Bd6 24. Nd2 Bg4 25. Rf1 b5 26. Bf3 Bd7 27. Be2 a6 28. b3 Rac8 29. Kf2 f5 30. Kg2 Be7 31. exf5 Bxf5 32. Rxf5 Rxf5 33. Bg4 Rff8 34. Bxc8 Rxc8 35. Ne4 c4 36. d6 Bd8 37. b4 Bb6 38. Nc5 Bxc5 39. bxc5 Rxc5 40. Rd1 Rc8 41. Kf3 Kf7 42. Ke4 Ke6 43. Rd5 c3 44. Rxe5+ Kxd6 45. Rd5+ Ke6 46. Rd1 c2 47. Rc1 a5 48. Kd3 b4 49. axb4 axb4 50. Rxc2 Rd8+ 51. Ke4 b3 52. Rb2 Rb8 53. Kd4 Kf5 54. h3 1/2-1/2

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.28"]
[Round "4"]
[White "Liu, Jonas1"]
[Black "Koch, Mika Jonas"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1539"]
[PlyCount "63"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bg4 6. Be3 e5 7. c4 Qd7 8. d5 Nd4 9. Bxd4 cxd4 10. Nxe5 Bb4+ 11. Nd2 Bxd1 12. Nxd7 Ba4 13. Ne5 Nf6 14. Nd3 Bxd2+ 15. Kxd2 0-0 16. f3 Rac8 17. b3 Bd7 18. Ne5 Bf5 19. g4 Bg6 20. g5 Rfe8 21. Nxg6 fxg6 22. gxf6 gxf6 23. Bh3 f5 24. Rae1 Kf7 25. Kd3 Rc7 26. d6 Rd7 27. c5 b6 28. b4 bxc5 29. bxc5 Rb8 30. Rb1 Rdb7 31. Rxb7+ Rxb7 32. Re1 1-0

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.27"]
[Round "3"]
[White "Koch, Mika Jonas"]
[Black "Pishnograev, Ilya"]
[Result "1-0"]
[ECO "A22"]
[PlyCount "33"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nf6 3. d3 d5 4. cxd5 Nxd5 5. Bd2 Nc6 6. Nf3 f6 7. g3 Be6 8. Bg2 Qd7 9. 0-0 Bc5 10. a3 a6 11. Qc2 b5 12. Nxd5 Qxd5 13. Ng5 Qd6 14. Nxe6 Qxe6 15. Qxc5 Nd4 16. Bxa8 Nxe2+ 17. Kh1 1-0

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.27"]
[Round "2"]
[White "Stepanjan, Tatevik Mia"]
[Black "Koch, Mika Jonas"]
[Result "0-1"]
[ECO "B72"]
[WhiteElo "1351"]
[PlyCount "100"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nc6 5. Be3 Nf6 6. Nc3 g6 7. Bc4 Bg7 8. 0-0 0-0 9. Rb1 Ng4 10. Nxc6 bxc6 11. Bd4 Ne5 12. Bb3 c5 13. Bxe5 Bxe5 14. Bd5 Rb8 15. Qd3 Bd7 16. Rfe1 Qc7 17. a3 Rfc8 18. Qf3 Be8 19. b3 Qa5 20. Ne2 Qxa3 21. Nf4 c4 22. Bxc4 Rxc4 23. bxc4 Rxb1 24. Rxb1 Qxf3 25. gxf3 Bxf4 26. Rb8 Kf8 27. Rb7 Ba4 28. c3 a5 29. Ra7 Bb3 30. c5 dxc5 31. Rxa5 c4 32. Rd5 e6 33. Ra5 Bd2 34. Kf1 Bxc3 35. Ra3 Kg7 36. Ke2 Bb4 37. Ra1 c3 38. Kd3 c2 39. Rc1 Ba3 40. Rxc2 Bxc2+ 41. Kxc2 Bd6 42. h3 Kf6 43. Kd3 Kg5 44. Kd4 Kf4 45. h4 h5 46. Kc4 Kxf3 47. Kd3 Bc5 48. e5 Bxf2 49. Kd2 Bxh4 50. Kd1 g5 0-1

[Event "Marburg op-B"]
[Site "Marburg"]
[Date "2023.10.26"]
[Round "1"]
[White "Koch, Mika Jonas"]
[Black "Scheerer, Amelie"]
[Result "0-1"]
[ECO "C51"]
[BlackElo "1468"]
[PlyCount "70"]
[EventDate "2023.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 217 Extra"]
[Source "ChessBase"]
[SourceDate "2024.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Be7 6. 0-0 Nf6 7. Re1 0-0 8. d4 d6 9. h3 exd4 10. cxd4 d5 11. exd5 Nxd5 12. Bxd5 Qxd5 13. Nc3 Qc4 14. Bb2 Bb4 15. d5 Bxc3 16. Rc1 Nb4 17. Ne5 Qxd5 18. Rxc3 Qxd1 19. Rxd1 c6 20. Rg3 f6 21. Nf3 Nd5 22. Nd4 Re8 23. Rd2 Bd7 24. Nb5 Bf5 25. Nd6 Re1+ 26. Kh2 Bd7 27. Rxd5 cxd5 28. Bxf6 g6 29. Nb5 Bf5 30. Nc7 Rf8 31. Bc3 Rd1 32. Nb5 Rd3 33. Rxd3 Bxd3 34. Nd4 Rxf2 35. a3 Be4 0-1

