[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.08"]
[Round "9"]
[White "Gruendker, Jona"]
[Black "Carstens, Finja"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1680"]
[PlyCount "81"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. Nf3 Bg4 5. h3 Bh5 6. d4 Nf6 7. Be3 e6 8. a3 c6 9. Be2 Nbd7 10. Qd2 0-0-0 11. Ne4 Qxd2+ 12. Nfxd2 Bxe2 13. Kxe2 Nd5 14. Ng5 f5 15. Nf7 f4 16. Nxh8 fxe3 17. fxe3 e5 18. Nf7 Re8 19. c4 N5f6 20. Kd3 e4+ 21. Kc3 h6 22. Rhf1 a5 23. Rf4 b5 24. b3 Kc7 25. Raf1 Bxa3 26. g4 a4 27. g5 Nh5 28. Rxe4 Rxe4 29. Nxe4 Kb6 30. cxb5 Kxb5 31. bxa4+ Kxa4 32. gxh6 gxh6 33. Nxh6 Nb6 34. Rg1 Nd5+ 35. Kd3 Nb4+ 36. Ke2 Kb3 37. Rg5 Kc4 38. Nd2+ Kc3 39. Rc5+ Kb2 40. Rxh5 Nd5 41. Nc4+ 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.08"]
[Round "8"]
[White "Schuricht, Emil Frederick"]
[Black "Gruendker, Jona"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1569"]
[BlackElo "1680"]
[PlyCount "77"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 a6 6. e3 Bf5 7. f3 e6 8. Nge2 Nc6 9. Nc1 Nb4 10. Nd3 h6 11. Nxb4 Qd7 12. Nd3 Be7 13. Ne5 Qd8 14. Bd3 Bxd3 15. Qxd3 0-0 16. 0-0 Nh5 17. Ne2 Nxf4 18. Nxf4 Bd6 19. Rac1 Qg5 20. Nh3 Qe7 21. f4 b5 22. Rc2 Rfc8 23. Rfc1 Rxc2 24. Rxc2 Qh4 25. Nf3 Qe7 26. Nf2 b4 27. Rc6 a5 28. Qc2 Qd7 29. Ne5 Bxe5 30. fxe5 a4 31. Qc5 b3 32. a3 Ra5 33. Qd6 Qe8 34. Qc7 Ra8 35. Nd3 Kh7 36. Nc5 Ra7 37. Qxa7 Qxc6 38. Qxf7 Qb5 39. Nxe6 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.07"]
[Round "7"]
[White "Gruendker, Jona"]
[Black "Winter, Astrid"]
[Result "1/2-1/2"]
[ECO "B26"]
[WhiteElo "1680"]
[BlackElo "1931"]
[PlyCount "37"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 d6 3. g3 Nc6 4. Bg2 g6 5. Nge2 Bg7 6. 0-0 e5 7. d3 Nge7 8. Be3 0-0 9. Qd2 Be6 10. f4 Nd4 11. a4 Qd7 12. a5 Rab8 13. fxe5 dxe5 14. Na4 b6 15. b3 Nec6 16. axb6 axb6 17. Nxd4 Nxd4 18. Nb2 Qc7 19. Ra2 1/2-1/2

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.07"]
[Round "6"]
[White "Oliveira, Luis Manuel Farinha"]
[Black "Gruendker, Jona"]
[Result "0-1"]
[ECO "D15"]
[WhiteElo "1622"]
[BlackElo "1680"]
[PlyCount "60"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. e4 b5 6. e5 Nd5 7. a4 e6 8. axb5 Nxc3 9. bxc3 cxb5 10. Be2 Be7 11. Bxc4 bxc4 12. Qa4+ Nd7 13. Qxc4 0-0 14. 0-0 a5 15. Re1 Bb7 16. Qd3 Nb6 17. Rb1 Bd5 18. Be3 Qc7 19. Rec1 Rfc8 20. Nd2 a4 21. Rxb6 Qxb6 22. c4 Qa6 23. Qf1 a3 24. cxd5 Qxf1+ 25. Rxf1 exd5 26. Nf3 a2 27. Ra1 Rcb8 28. Nd2 Bb4 29. Nb3 Bc3 30. Rc1 Rxb3 0-1

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.06"]
[Round "5"]
[White "Gruendker, Jona"]
[Black "Duncan, Patrick"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "1680"]
[BlackElo "2015"]
[PlyCount "65"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nf6 5. Nf3 e6 6. 0-0 h6 7. Bf4 Bd6 8. Bxd6 Qxd6 9. c3 0-0 10. Nbd2 Qb6 11. Qb3 Qc7 12. Ne5 Nc6 13. f4 Nd7 14. Ndf3 f6 15. Nxc6 bxc6 16. Rae1 Nb6 17. Qc2 Bd7 18. f5 exf5 19. Bxf5 Bxf5 20. Qxf5 Rfe8 21. Re6 Qd7 22. Rfe1 Re7 23. Nh4 Rxe6 24. Qxe6+ Kh7 25. Qxd7 Nxd7 26. Re7 Nb6 27. Rc7 Re8 28. Rxa7 Re2 29. b3 Rc2 30. Ra6 Nd7 31. Rxc6 Rxa2 32. Rd6 Ra7 33. Rxd5 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.06"]
[Round "4"]
[White "Reichard, Sven"]
[Black "Gruendker, Jona"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "1468"]
[BlackElo "1680"]
[PlyCount "145"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Qd3 Qe7 8. Bd2 0-0 9. Be2 Bxc3 10. Bxc3 Nxe4 11. Bd4 a5 12. Qe3 Re8 13. 0-0 Ba6 14. Rfe1 Bxe2 15. Rxe2 Qg5 16. Rae1 Qxe3 17. Rxe3 d5 18. f3 Nd6 19. Rxe8+ Nxe8 20. Re7 a4 21. Bc3 h5 22. Kf2 Kf8 23. Re3 Rb8 24. Ke2 Nd6 25. b3 axb3 26. cxb3 Ra8 27. a4 g6 28. Be1 Nf5 29. Rc3 Rb8 30. Bf2 Ke8 31. Bc5 Ra8 32. Rc1 Kd7 33. Kd3 Nd6 34. Ra1 Nb7 35. Bf2 c5 36. Kc2 Kd6 37. Be1 Re8 38. Bg3+ Kc6 39. Kd3 Na5 40. Rb1 c4+ 41. bxc4 Nxc4 42. Bf2 Ra8 43. Ra1 Rxa4 44. Rxa4 Nb2+ 45. Kd4 Nxa4 46. Ke5 f5 47. h4 Nb6 48. Kf6 Kd6 49. Bg3+ Kd7 50. Kxg6 c5 51. Kxh5 d4 52. Kg6 d3 53. Be1 Ke6 54. h5 Nd5 55. h6 Nf6 56. g4 fxg4 57. fxg4 Nxg4 58. h7 Ne5+ 59. Kg7 Nf7 60. Kg6 c4 61. Bc3 Ke7 62. Kg7 Ke8 63. Bb4 c3 64. Bxc3 Ke7 65. Bd2 Ke6 66. Bb4 Nh8 67. Kxh8 Kf7 68. Bd2 Kf8 69. Bc3 Kf7 70. Bb4 d2 71. Bxd2 Kf8 72. Be3 Kf7 73. Bc5 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.05"]
[Round "3"]
[White "Gruendker, Jona"]
[Black "Evans, David K"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1680"]
[BlackElo "2160"]
[PlyCount "111"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Nf6 6. e5 Qe7 7. Be3 c5 8. exf6 cxd4 9. fxe7 Bxe7 10. Bxd4 0-0 11. Nc3 b6 12. 0-0-0 Bb7 13. Bxg7 Kxg7 14. Rxd7 Bg5+ 15. Kb1 Bc6 16. Rc7 Be8 17. Bd3 Bf4 18. Re7 Bd6 19. Re3 Bc6 20. Be4 Bxe4 21. Rxe4 Kh8 22. Rd1 Bc5 23. f3 Rg8 24. b4 Bf8 25. g3 a6 26. Rd7 Bg7 27. Nd5 Rad8 28. Rxd8 Rxd8 29. c4 b5 30. cxb5 axb5 31. Nc7 h6 32. Nxb5 Rb8 33. a4 Ra8 34. a5 Bf8 35. Na3 Kg7 36. Kb2 f5 37. Rc4 Kf6 38. Kb3 Ke6 39. Nc2 Bd6 40. Nd4+ Ke5 41. f4+ Kf6 42. Rc6 Rd8 43. Nb5 Ke7 44. Rxd6 Rxd6 45. Nxd6 Kxd6 46. b5 Kc7 47. Kc4 h5 48. Kd5 Kd7 49. a6 Kc7 50. a7 Kb7 51. b6 Kxb6 52. a8Q Kc7 53. Qc6+ Kb8 54. Qb6+ Ka8 55. Kc6 h4 56. Qb7# 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.05"]
[Round "2"]
[White "Voelker, Werner"]
[Black "Gruendker, Jona"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "1403"]
[BlackElo "1680"]
[PlyCount "41"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Nf3 Nge7 6. 0-0 0-0 7. e3 d5 8. cxd5 Nxd5 9. Nxd5 Qxd5 10. Nd4 Qd6 11. Nxc6 bxc6 12. Qc2 Bb7 13. b3 e4 14. Bb2 Bxb2 15. Qxb2 f5 16. Rfd1 Rfd8 17. Bf1 a5 18. Bc4+ Kf8 19. Qh8+ Ke7 20. Qg7+ Ke8 21. Qf7# 1-0

[Event "Krefeld op"]
[Site "Krefeld"]
[Date "2022.08.04"]
[Round "1"]
[White "Gruendker, Jona"]
[Black "Keller, Peter1111"]
[Result "0-1"]
[ECO "C47"]
[WhiteElo "1680"]
[BlackElo "2377"]
[PlyCount "74"]
[EventDate "2022.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 209 Extra"]
[Source "ChessBase"]
[SourceDate "2022.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2022.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5 0-0 9. dxc6 Bg4 10. Be2 Qe8 11. Be3 Rd8 12. Qc1 Bxe2 13. Kxe2 Qxc6 14. Kf1 Bxc3 15. bxc3 Nd5 16. Bd4 Nxc3 17. Bxc3 Qxc3 18. h4 Rd2 19. Rh3 Qd4 20. Qe1 Rxf2+ 21. Qxf2 Qxa1+ 22. Qe1 Qxa2 23. Qc3 Qb1+ 24. Kf2 Re8 25. Rg3 g6 26. h5 Qb6+ 27. Kf1 Qb5+ 28. Kg1 Qxh5 29. Rd3 Qe5 30. Qc4 Qa1+ 31. Kh2 Re1 32. c3 Rh1+ 33. Kg3 Qe1+ 34. Kf3 Rf1+ 35. Kg4 h5+ 36. Kg5 Rf5+ 37. Kh6 Qc1+ 0-1

