[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.06"]
[Round "9"]
[White "Memmeler, Bjoern"]
[Black "Olbrich, Carl Jona"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1516"]
[PlyCount "53"]
[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. Nf3 Nc6 2. d4 d5 3. g3 e6 4. Bg2 Bb4+ 5. Nbd2 Nge7 6. 0-0 f6 7. c3 Bd6 8. e4 e5 9. dxe5 Nxe5 10. Nxe5 Bxe5 11. exd5 0-0 12. Nc4 Ng6 13. Nxe5 fxe5 14. Qb3 Kh8 15. Be3 Qf6 16. Qc4 Nf4 17. gxf4 exf4 18. Bxf4 Qxf4 19. Qxf4 Rxf4 20. Rae1 Bf5 21. Re7 Bd3 22. Rfe1 Raf8 23. Re8 Rxf2 24. Rxf8+ Rxf8 25. Re7 h6 26. Rxc7 Rf5 27. d6 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.04"]
[Round "4"]
[White "Kraus, Linus"]
[Black "Olbrich, Carl Jona"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "1486"]
[PlyCount "91"]
[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 d6 3. c3 Nf6 4. Be2 a6 5. 0-0 b5 6. d3 Bb7 7. h3 e6 8. Be3 Nc6 9. Nbd2 Be7 10. a3 Qc7 11. d4 Na5 12. Bd3 c4 13. Bc2 Rc8 14. Qe2 0-0 15. Nh2 Kh8 16. Ng4 e5 17. Nxf6 gxf6 18. d5 f5 19. exf5 Bxd5 20. Ne4 f6 21. Rad1 Bc6 22. f4 d5 23. Ng3 Rg8 24. Kh2 Bd6 25. Qf2 d4 26. cxd4 Rxg3 27. d5 Rcg8 28. Qxg3 Rxg3 29. Kxg3 Qg7+ 30. Kh2 Bd7 31. fxe5 Bxe5+ 32. Bf4 Bxb2 33. Bd6 Be5+ 34. Bxe5 fxe5 35. f6 Qf8 36. f7 Nb7 37. Rde1 Kg7 38. Rxe5 Nd6 39. Rg5+ Kh6 40. Rg8 Qxf7 41. Rxf7 Nxf7 42. Ra8 Kg5 43. Ra7 Ne5 44. Kg3 Bf5 45. h4+ Kh5 46. Bxf5 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.04"]
[Round "5"]
[White "Olbrich, Carl Jona"]
[Black "Brandt, Greta"]
[Result "0-1"]
[ECO "C14"]
[BlackElo "1415"]
[PlyCount "74"]
[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 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bd2 c5 7. Qg4 g6 8. Bh6 cxd4 9. Qxd4 Nc6 10. Qf4 Rg8 11. Nf3 a6 12. h4 Qc7 13. 0-0-0 b5 14. Bd3 Bb7 15. h5 Ncxe5 16. Kb1 0-0-0 17. Bxb5 axb5 18. Nxb5 Qb8 19. Qa4 Nc6 20. Be3 Bc5 21. Ng5 Bxe3 22. Nxf7 Bc5 23. hxg6 hxg6 24. Nxd8 Rxd8 25. Rh7 Bxf2 26. Rf1 Bc5 27. Rff7 Qg3 28. a3 Qxg2 29. b4 Qg1+ 30. Ka2 Bf8 31. Qb3 Qb6 32. c4 Nce5 33. Rf1 dxc4 34. Qa4 Kb8 35. Nc3 Qd4 36. Nb5 Qb6 37. Rc1 Bc6 0-1

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2023.08.03"]
[Round "3"]
[White "Bruens, Thilo"]
[Black "Olbrich, Carl Jona"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "1763"]
[PlyCount "95"]
[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. Nf3 Nf6 2. d4 d5 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. Ne5 Bxc3+ 7. bxc3 Bd7 8. Nxd7 Qxd7 9. Ba3 Ne4 10. Qc2 e5 11. f3 Ng5 12. h4 Ne6 13. e4 Ncxd4 14. cxd4 Nxd4 15. Qd1 dxe4 16. fxe4 0-0-0 17. Bd3 Qe6 18. 0-0 h5 19. Bc5 b6 20. Bxd4 Rxd4 21. Qf3 Rh6 22. Rad1 f6 23. Be2 c5 24. Rxd4 exd4 25. Qf5 Kd7 26. Qxe6+ Kxe6 27. Rf5 g6 28. Rd5 Rh8 29. Kf2 Ke7 30. Bd1 Rd8 31. Rxd8 Kxd8 32. Kg3 b5 33. Be2 b4 34. Kf4 Kd7 35. e5 Ke6 36. exf6 Kxf6 37. Bd3 a5 38. Bc2 a4 39. Bxa4 d3 40. Ke3 Ke5 41. Be8 d2 42. Kxd2 Kf5 43. Ke3 g5 44. hxg5 Kxg5 45. Ke4 h4 46. Kd5 Kf4 47. Bd7 Ke3 48. Kxc5 1-0

