[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.06"]
[Round "9"]
[White "Kosubek, Sven"]
[Black "Marks, Stefan"]
[Result "1-0"]
[ECO "E32"]
[WhiteElo "1567"]
[BlackElo "1202"]
[PlyCount "33"]
[EventDate "2023.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 0-0 5. a3 Be7 6. e4 d6 7. Nf3 Nbd7 8. Bd3 g6 9. h3 b6 10. e5 dxe5 11. dxe5 Ne8 12. Be4 Rb8 13. Bh6 Ng7 14. Rd1 Bb7 15. Qa4 c6 16. Bxc6 Bxc6 17. Qxc6 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.06"]
[Round "8"]
[White "Vasylieva, Kira"]
[Black "Kosubek, Sven"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "1421"]
[BlackElo "1567"]
[PlyCount "47"]
[EventDate "2023.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 e6 3. Be2 Nc6 4. d3 d5 5. exd5 exd5 6. 0-0 Nf6 7. Bg5 Be7 8. h3 0-0 9. Nbd2 h6 10. Bh4 b6 11. Re1 Bb7 12. c3 d4 13. cxd4 Nxd4 14. Nxd4 Qxd4 15. Bf3 Bxf3 16. Nxf3 Qd7 17. Qb3 Nd5 18. Bxe7 Nxe7 19. Re2 Nc6 20. Rae1 Rfe8 21. Rxe8+ Rxe8 22. Rxe8+ Qxe8 23. Qb5 Qe6 24. Qc4 1/2-1/2

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.05"]
[Round "7"]
[White "Kosubek, Sven"]
[Black "Wiedenbruch, Silke"]
[Result "1/2-1/2"]
[ECO "E35"]
[WhiteElo "1567"]
[BlackElo "1201"]
[PlyCount "61"]
[EventDate "2023.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Bb4 6. Qc2 Be6 7. e3 0-0 8. Bd3 g6 9. Nf3 Nbd7 10. 0-0 a6 11. a3 Bd6 12. e4 dxe4 13. Nxe4 Be7 14. h3 c6 15. Nc5 Nxc5 16. dxc5 Nd5 17. Bxe7 Qxe7 18. Rfe1 Nf4 19. Bf1 Qc7 20. Nd4 Bd5 21. g3 Nh5 22. Re3 Ng7 23. Rae1 Rfe8 24. Qc3 Rad8 25. b4 Qc8 26. Kh2 Rxe3 27. Rxe3 Re8 28. Bg2 Rxe3 29. Qxe3 Bxg2 30. Kxg2 Nf5 31. Nxf5 1/2-1/2

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.03"]
[Round "3"]
[White "Kosubek, Sven"]
[Black "Reineke, Jannes Severin"]
[Result "0-1"]
[ECO "D36"]
[WhiteElo "1567"]
[PlyCount "58"]
[EventDate "2023.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. Qc2 0-0 7. e3 h6 8. Bh4 c6 9. Bd3 Re8 10. Nge2 Nbd7 11. 0-0 Ne4 12. Bxe7 Qxe7 13. Rae1 Ndf6 14. f3 Nd6 15. Ng3 a6 16. e4 dxe4 17. fxe4 Nb5 18. Nxb5 axb5 19. a3 Ra4 20. Qc3 Qd8 21. b4 Be6 22. Bc2 Ra6 23. Ra1 Qa8 24. Rxf6 gxf6 25. Nh5 Kf8 26. Qc5+ Re7 27. Nxf6 Qd8 28. Qc3 Rc7 29. Qe3 Qxf6 0-1

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.02"]
[Round "1"]
[White "Kosubek, Sven"]
[Black "Deider, Kevin"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "1567"]
[BlackElo "1773"]
[PlyCount "128"]
[EventDate "2023.08.02"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. cxd5 exd5 5. Nf3 Bd6 6. Qc2 Ne7 7. e3 Bf5 8. Bd3 Bxd3 9. Qxd3 0-0 10. 0-0 Ng6 11. a3 a5 12. Rb1 Nh4 13. e4 Nxf3+ 14. Qxf3 dxe4 15. Nxe4 Be7 16. Be3 Qd5 17. Ng5 Qxf3 18. Nxf3 Nd7 19. b4 axb4 20. axb4 b5 21. Rfc1 Rfc8 22. Ne5 Nxe5 23. dxe5 Kf8 24. Bc5 Bxc5 25. Rxc5 Ke7 26. Kf1 Ra2 27. Rd1 Rb2 28. Rd4 Ra8 29. g3 Raa2 30. Rf4 Rc2 31. Rxc2 Rxc2 32. Kg2 Re2 33. Rd4 Rxe5 34. f4 Re2+ 35. Kh3 f5 36. Rd3 h6 37. Rc3 Kd7 38. Ra3 g5 39. fxg5 hxg5 40. Ra7+ Ke6 41. Ra8 Kd5 42. Rd8+ Kc4 43. Rd6 Kxb4 44. Rxc6 g4+ 45. Kh4 Rxh2+ 46. Kg5 Rh3 47. Kf4 Rh5 48. Rc8 Kb3 49. Rc7 b4 50. Rc8 Kb2 51. Rc7 b3 52. Rc8 Kb1 53. Rc7 b2 54. Rc8 Rh2 55. Kxf5 Rc2 56. Rb8 Rc4 57. Re8 Kc2 58. Re2+ Kb3 59. Re3+ Rc3 60. Rxc3+ Kxc3 61. Kxg4 b1Q 62. Kh4 Qh7+ 63. Kg5 Qg7+ 64. Kf4 Kd4 0-1

