[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.28"]
[Round "7"]
[White "Wong, Gengchun"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2320"]
[BlackElo "2055"]
[PlyCount "81"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. d3 0-0 8. a4 Bb7 9. Nc3 b4 10. Nd5 Na5 11. Nxe7+ Qxe7 12. Ba2 d5 13. exd5 Bxd5 14. Bxd5 Nxd5 15. Re1 f6 16. c4 Nb6 17. d4 Rad8 18. Qc2 Nbxc4 19. b3 Nb6 20. dxe5 Rd5 21. exf6 Qxf6 22. Bb2 Qc6 23. Qxc6 Nxc6 24. Rac1 Rd6 25. Rc2 Rfd8 26. Kf1 Nd5 27. Ne5 Nxe5 28. Bxe5 Re6 29. Bg3 Rxe1+ 30. Kxe1 Nc3 31. Rd2 Re8+ 32. Kf1 c5 33. f3 c4 34. bxc4 Nxa4 35. Ra2 Nb6 36. Rxa6 Nxc4 37. Ra4 Ne3+ 38. Ke2 b3 39. Kd3 Nxg2 40. Rb4 Ne1+ 41. Bxe1 1/2-1/2

[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.27"]
[Round "6"]
[White "Matthaei, Jakob"]
[Black "Solberg, Joachim Krokvik"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "2055"]
[BlackElo "2167"]
[PlyCount "32"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. c4 e6 2. g3 Nf6 3. Bg2 d5 4. Nf3 Be7 5. 0-0 0-0 6. b3 c5 7. cxd5 exd5 8. d4 Nc6 9. Bb2 Ne4 10. dxc5 Bxc5 11. e3 Be6 12. Nc3 Nxc3 13. Bxc3 Qe7 14. Qd2 Rfd8 15. Rac1 Ba3 16. Bb2 Rac8 1/2-1/2

[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.27"]
[Round "5"]
[White "Wichmann, Cliff"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2287"]
[BlackElo "2055"]
[PlyCount "25"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. 0-0 0-0 6. d4 dxc4 7. Na3 Bxa3 8. bxa3 Bd7 9. Ne5 Bc6 10. Nxc6 Nxc6 11. e3 Nd5 12. Qc2 Nb6 13. Rd1 1/2-1/2

[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.26"]
[Round "3"]
[White "Hartge, Gedeon"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "E49"]
[WhiteElo "2219"]
[BlackElo "2055"]
[PlyCount "109"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd3 d5 6. a3 Bxc3+ 7. bxc3 dxc4 8. Bxc4 c5 9. Ne2 Qc7 10. Bd3 e5 11. dxe5 Qxe5 12. Qc2 Nc6 13. 0-0 Re8 14. Bb2 Qe7 15. c4 Ne5 16. Nf4 Rd8 17. Rad1 Nxd3 18. Rxd3 Be6 19. Rfd1 Bf5 20. Rxd8+ Rxd8 21. Qb3 Rxd1+ 22. Qxd1 Qd7 23. Qc1 Qd6 24. h3 Nd7 25. Nd5 Nb6 26. e4 Bxe4 27. Qg5 Bg6 28. Ne7+ Kf8 29. Bxg7+ Ke8 30. Nd5 Nxd5 31. cxd5 Qe7 32. Bf6 Qe1+ 33. Kh2 Qe4 34. f3 Qe2 35. Qf4 Kd7 36. Qb8 Qe8 37. Qxb7+ Kd6 38. f4 Qd7 39. Be5+ Ke7 40. d6+ Ke8 41. Qb8+ Qd8 42. Qxa7 f6 43. d7+ Qxd7 44. Qxd7+ Kxd7 45. Bxf6 Ke6 46. Be5 Kd5 47. g4 Bc2 48. Kg3 Ke4 49. Kh4 Bd3 50. Kg5 Bf1 51. h4 Be2 52. Bg7 c4 53. f5 h6+ 54. Bxh6 c3 55. Bg7 1-0

[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.26"]
[Round "4"]
[White "Matthaei, Jakob"]
[Black "Phenn, Jan Niklas"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2055"]
[BlackElo "1931"]
[PlyCount "77"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. e4 0-0 6. Nge2 d6 7. 0-0 Be6 8. d3 a6 9. h3 Nd7 10. f4 f5 11. exf5 Bxf5 12. g4 Bg6 13. f5 Bf7 14. Ne4 d5 15. Ng5 Bc5+ 16. Kh1 Nb6 17. Nxf7 Rxf7 18. cxd5 Nb4 19. a3 N4xd5 20. d4 Bd6 21. Qb3 c6 22. dxe5 Bxe5 23. Nf4 Qh4 24. a4 a5 25. Bd2 Nxf4 26. Bxf4 Bxf4 27. Rxf4 Nd5 28. Bxd5 cxd5 29. Raf1 Rd8 30. Kg2 Qe7 31. Qd3 Rf6 32. g5 Rb6 33. f6 Rxb2+ 34. Kg3 Qe5 35. Kh4 gxf6 36. gxf6 Rb4 37. Qg3+ Kf8 38. Qg7+ Ke8 39. f7+ 1-0

[Event "Nordhausen op 14th"]
[Site "Nordhausen"]
[Date "2024.07.25"]
[Round "2"]
[White "Matthaei, Jakob"]
[Black "Haack, Kevin"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2055"]
[BlackElo "2321"]
[PlyCount "103"]
[EventDate "2024.07.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 221 Extra"]
[Source "ChessBase"]
[SourceDate "2024.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2024.09.30"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 dxc4 5. Qa4+ Nbd7 6. Qxc4 c5 7. Qc2 a6 8. 0-0 Ra7 9. d3 b5 10. a4 Qb6 11. Nc3 b4 12. a5 Qd8 13. Nd1 Bd6 14. Ne3 0-0 15. Nc4 Bc7 16. e4 Qe7 17. Nfd2 Bb7 18. f4 Rc8 19. b3 Bc6 20. Bb2 Bb5 21. Ne3 Qd8 22. Ndc4 Nb8 23. f5 e5 24. g4 h6 25. h4 Nh7 26. f6 Nxf6 27. Bh3 Nh7 28. Qf2 f6 29. g5 Bd7 30. Bxd7 Qxd7 31. gxh6 gxh6 32. Nd5 Rf8 33. Kh2 Nc6 34. Qxc5 Bd8 35. Rg1+ Kh8 36. Raf1 Re8 37. Qe3 Nd4 38. Bxd4 exd4 39. Qxh6 Bc7+ 40. Nxc7 Qxc7+ 41. Qf4 Qc5 42. Qf5 Qc7+ 43. Kh1 Rb7 44. Rg6 Qe7 45. Rfg1 Qf8 46. Qg4 Rd8 47. Nd6 Rc7 48. Nf5 Rb7 49. Nh6 Rbb8 50. Rg8+ Qxg8 51. Qxg8+ Rxg8 52. Nf7# 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.30"]
[Round "7.6"]
[White "Kanzow, Alexander"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "1839"]
[BlackElo "2076"]
[PlyCount "63"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Guettingen Rochade"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. 0-0 c5 5. c4 e6 6. Nc3 Be7 7. b3 0-0 8. Bb2 d6 9. d4 cxd4 10. Qxd4 Nc6 11. Qd2 a6 12. e4 Qc7 13. Qe2 Nd7 14. Rfd1 Rfd8 15. Rac1 Rac8 16. Nd5 exd5 17. cxd5 Qb8 18. dxc6 Rxc6 19. Rxc6 Bxc6 20. Nd4 Bb7 21. Nf5 Bf6 22. Bxf6 Nxf6 23. e5 Bxg2 24. exf6 Bh3 25. Ne7+ Kh8 26. Qh5 Be6 27. Qg5 g6 28. Qh6 Rg8 29. Nxg8 Qxg8 30. Rxd6 Bf5 31. Rd8 Qxd8 32. Qg7# 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "6.6"]
[White "Matthaei, Jakob"]
[Black "Dauner, Benedikt"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2076"]
[BlackElo "2390"]
[PlyCount "115"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Karlsruhe SF"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 Nc6 3. c3 Nf6 4. e5 Nd5 5. Bc4 Nb6 6. Bb3 d5 7. d4 cxd4 8. cxd4 Bg4 9. Be3 e6 10. 0-0 Be7 11. Nc3 Na5 12. Ba4+ Nxa4 13. Qxa4+ Nc6 14. Nd2 0-0 15. f4 a6 16. Nf3 b5 17. Qd1 Na5 18. Ne2 Rc8 19. Ng3 Bh4 20. Qe1 Nc6 21. Nxh4 Qxh4 22. h3 Bf5 23. Nxf5 Qxe1 24. Nh6+ gxh6 25. Raxe1 Ne7 26. g4 f5 27. Rc1 Kf7 28. Kg2 Kg6 29. Kf3 Rxc1 30. Rxc1 Rc8 31. Rg1 Kf7 32. Rg2 Rc4 33. Rd2 Rc1 34. Bf2 Kg6 35. Be3 Rh1 36. Kg3 fxg4 37. hxg4 h5 38. f5+ exf5 39. gxh5+ Kxh5 40. Rc2 Rh4 41. Bf2 Ng6 42. Rc7 Kg5 43. Rd7 h5 44. Rg7 Re4 45. Kf3 Rf4+ 46. Ke3 Rg4 47. Kf3 Rf4+ 48. Ke3 Re4+ 49. Kf3 h4 50. Rh7 Rf4+ 51. Ke3 Kg4 52. Rg7 Re4+ 53. Kd3 Kf3 54. Rxg6 Kxf2 55. Rh6 Kg3 56. Rg6+ Kh2 57. Rf6 f4 58. e6 0-1

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.29"]
[Round "5.8"]
[White "Matthaei, Jakob"]
[Black "Struck, Lasse"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2076"]
[BlackElo "1964"]
[PlyCount "97"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Essen Katernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 d6 7. Nc3 Nxc3 8. bxc3 Qc7 9. Bd2 Nd7 10. exd6 Bxd6 11. Bd3 b6 12. 0-0 Bb7 13. h3 0-0 14. Re1 Bf4 15. Be4 Bxe4 16. Rxe4 Bxd2 17. Qxd2 Rac8 18. Rc1 Qc4 19. Qc2 b5 20. Nd2 Qd5 21. Qb3 Rc7 22. c4 bxc4 23. Rxc4 Rxc4 24. Qxc4 Qxc4 25. Nxc4 Rc8 26. Ne5 Nb6 27. Re2 Rc1+ 28. Kh2 Kf8 29. Rb2 Rc7 30. Kg3 Ke7 31. Rb3 Kd6 32. Nf3 f6 33. h4 Rc4 34. Rb2 g6 35. Rb3 Ra4 36. Rb2 h6 37. Rc2 g5 38. hxg5 hxg5 39. Rb2 Nd5 40. Rc2 a5 41. Nd2 Nb4 42. Ne4+ Kd5 43. Nxf6+ Kxd4 44. Re2 Rxa2 45. Re4+ Kd3 46. Re3+ Kd4 47. Re4+ Kd3 48. Re3+ Kd4 49. Re4+ 1/2-1/2

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.28"]
[Round "4.6"]
[White "Leonard, Timo"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2170"]
[BlackElo "2076"]
[PlyCount "101"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Hemer"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 5. Bxb4 cxb4 6. a3 bxa3 7. Rxa3 0-0 8. Nc3 d5 9. cxd5 exd5 10. e3 Nc6 11. Be2 Be6 12. 0-0 Qe7 13. Qb3 Rfd8 14. Rc1 Bg4 15. h3 Be6 16. Raa1 Ne4 17. Na4 Rac8 18. Nc5 Nxc5 19. Rxc5 b6 20. Rcc1 Na5 21. Qb5 f6 22. Nd2 Rxc1+ 23. Rxc1 Nb7 24. Bf3 Nd6 25. Qb4 Qd7 26. Be2 Rc8 27. Rxc8+ Nxc8 28. Nb1 Qc7 29. Nc3 Ne7 30. Qa4 Bd7 31. Qa3 Bc6 32. Bb5 Ba8 33. Qa6 Qb7 34. Qa4 a5 35. Bd7 Kf7 36. Qb5 Qc7 37. g3 Qd6 38. Na4 Bc6 39. Bxc6 Qxc6 40. Qxc6 Nxc6 41. Nxb6 Ke6 42. Kf1 Nb4 43. Ke2 f5 44. Na4 g5 45. Nc5+ Ke7 46. Nb7 Nc6 47. Kd3 h5 48. Kc3 Ke6 49. Nc5+ Kf6 50. Nd3 Ke6 51. h4 1-0

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.28"]
[Round "3.4"]
[White "Matthaei, Jakob"]
[Black "Bethke, Richard"]
[Result "0-1"]
[ECO "C92"]
[WhiteElo "2076"]
[BlackElo "2354"]
[PlyCount "80"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Neuberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Be7 7. Re1 d6 8. h3 0-0 9. c3 Bb7 10. d4 Nd7 11. Nbd2 Re8 12. Nf1 Bf6 13. Ng3 g6 14. d5 Na5 15. Bc2 Nb6 16. Nh2 Bg7 17. Ng4 c6 18. dxc6 Nxc6 19. Qf3 Qh4 20. Ne3 Ne7 21. Bb3 Rf8 22. Qg4 Qxg4 23. Nxg4 Kh8 24. Nh2 f5 25. Bg5 Rae8 26. exf5 Nxf5 27. Nxf5 gxf5 28. Rad1 d5 29. Be3 Nc4 30. Bxc4 bxc4 31. f4 d4 32. cxd4 exd4 33. Bf2 c3 34. bxc3 dxc3 35. Nf3 Bxf3 36. gxf3 c2 37. Rc1 Rxe1+ 38. Rxe1 Bb2 39. Be3 Re8 40. Kf2 Rxe3 0-1

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.27"]
[Round "1.3"]
[White "Matthaei, Jakob"]
[Black "Weidemann, Jakob"]
[Result "1/2-1/2"]
[ECO "B53"]
[WhiteElo "2076"]
[BlackElo "2114"]
[PlyCount "137"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Muenster 32"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Nc3 Nc6 6. Bb5 Bd7 7. Bxc6 Bxc6 8. Bg5 e6 9. 0-0 Be7 10. Rad1 Qc7 11. Rfe1 0-0 12. h3 Rfd8 13. Qe3 b5 14. Nd4 Qb7 15. f3 Rac8 16. Nce2 b4 17. Rd2 Rc7 18. c4 bxc3 19. Nxc3 h6 20. Bh4 Ng4 21. hxg4 Bxh4 22. Red1 Qb6 23. Kh1 Rb8 24. f4 e5 25. Nf5 Qxe3 26. Nxe3 exf4 27. Nf5 Bf6 28. Nxd6 Bxc3 29. bxc3 Bd7 30. Nf5 Bxf5 31. gxf5 Rxc3 32. Rf1 Rc4 33. Rxf4 Re8 34. Re2 a5 35. Kh2 a4 36. Kg3 Re5 37. Kf3 Rc3+ 38. Kf2 f6 39. Rd2 Rec5 40. Rf3 Kf7 41. Rg3 Rxg3 42. Kxg3 Rc3+ 43. Kf4 h5 44. g3 g5+ 45. fxg6+ Kxg6 46. Rd4 Ra3 47. Rd2 Kf7 48. g4 h4 49. e5 fxe5+ 50. Kxe5 h3 51. Kf4 Rc3 52. g5 Ke6 53. Kg4 Kf7 54. Rh2 Kg6 55. Rxh3 Rc4+ 56. Kg3 Kxg5 57. Rh2 Rc3+ 58. Kg2 Kg4 59. Kf1 Rc1+ 60. Kf2 Rc2+ 61. Kg1 Rc4 62. Kf2 Rc2+ 63. Kg1 Rc3 64. Kf2 Ra3 65. Ke1 Kf4 66. Kd1 Ke4 67. Kc1 Kd5 68. Kb2 Rg3 69. Rh5+ 1/2-1/2

[Event "GER-chT U20"]
[Site "Magdeburg"]
[Date "2023.12.27"]
[Round "2.7"]
[White "Pikalow, Michael"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "2083"]
[BlackElo "2076"]
[PlyCount "80"]
[EventDate "2023.12.26"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 218 Extra"]
[Source "ChessBase"]
[SourceDate "2024.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2024.03.31"]
[SourceQuality "1"]
[WhiteTeam "Magdeburg USC"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. c4 Ba6 9. Nd2 Nb4 10. Nf3 d5 11. a3 Bxc4 12. Qd1 Bxf1 13. Rxf1 Na6 14. Qa4 Nb8 15. Bf4 Qd7 16. 0-0-0 Be7 17. e6 fxe6 18. Ne5 Qc8 19. Rfe1 0-0 20. Bg3 Bd6 21. Qg4 Rf5 22. Re3 c5 23. Nd3 Nc6 24. Bxd6 cxd6 25. Nf4 Ne5 26. Qh4 Qd7 27. Rh3 g5 28. Rg3 Ng6 29. Rxg5 Rxg5 30. Qxg5 Qf7 31. Nxg6 hxg6 32. g4 Rf8 33. Kb1 Qf6 34. Qh6 g5 35. Qh5 Kg7 36. Qh3 Qf3 37. Qf1 c4 38. h4 Qxf2 39. Qh3 Qf3 40. Qxf3 Rxf3 0-1

[Event "Prague Summer op-A 10th"]
[Site "Prague"]
[Date "2023.08.10"]
[Round "8"]
[White "Matthaei, Jakob"]
[Black "Jordanov, Mihail"]
[Result "0-1"]
[ECO "C96"]
[WhiteElo "2051"]
[BlackElo "2152"]
[PlyCount "120"]
[EventDate "2023.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 d6 8. c3 0-0 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 exd4 13. cxd4 Nc6 14. Nf1 Bf6 15. Be3 Bb7 16. Ng3 g6 17. Ne2 Re8 18. Nc3 cxd4 19. Nxd4 Nc5 20. Nd5 Bg7 21. f3 Ne5 22. Bf2 Nc4 23. Rb1 Bxd5 24. exd5 Qg5 25. Be4 Nxe4 26. fxe4 Rac8 27. Nf3 Qf4 28. Qe2 f5 29. e5 dxe5 30. b3 Na3 31. Be3 Qe4 32. Rbd1 Nc2 33. Bb6 Nxe1 34. Qxe1 Qxe1+ 35. Nxe1 Bf6 36. d6 Bd8 37. d7 Bxb6+ 38. Kf1 Kf7 39. Rd6 Bc5 40. Rxa6 Red8 41. dxc8Q Rxc8 42. Ra5 Rb8 43. a4 Bb4 44. Ra7+ Kf6 45. Rxh7 bxa4 46. bxa4 Bxe1 47. Kxe1 Ra8 48. Rb7 Rxa4 49. Rb6+ Kg5 50. Re6 Ra2 51. Kf1 e4 52. h4+ Kh5 53. Kg1 g5 54. hxg5 Kxg5 55. Rb6 Kf4 56. Rb4 Ke3 57. g3 Kf3 58. Rb3+ e3 59. Rc3 Rg2+ 60. Kf1 Rxg3 0-1

[Event "Prague Summer op-A 10th"]
[Site "Prague"]
[Date "2023.08.09"]
[Round "7"]
[White "Hinterreiter, Markus"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2206"]
[BlackElo "2051"]
[PlyCount "74"]
[EventDate "2023.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 e6 5. 0-0 Be7 6. Nc3 0-0 7. Re1 c5 8. e4 d6 9. d4 cxd4 10. Nxd4 Qc8 11. b3 Nbd7 12. f4 Rd8 13. Kh1 Bf8 14. Be3 Nc5 15. Bg1 a6 16. Rc1 Qc7 17. Qc2 Rac8 18. a4 Qb8 19. Qb1 Qa8 20. Re2 g6 21. Rce1 Bg7 22. Nd1 e5 23. Nf3 exf4 24. gxf4 Nh5 25. b4 Nxa4 26. Qb3 b5 27. cxb5 axb5 28. Ng5 Rc7 29. f5 Nf4 30. fxg6 Nxe2 31. Nxf7 Nc1 32. Qe6 Rxf7 33. Qxf7+ Kh8 34. Re3 Rf8 35. Qe7 Re8 36. Qf7 Rf8 37. Qe7 Re8 1/2-1/2

[Event "Prague Summer op-A 10th"]
[Site "Prague"]
[Date "2023.08.08"]
[Round "6"]
[White "Matthaei, Jakob"]
[Black "Von Mettenheim, Johannes"]
[Result "1/2-1/2"]
[ECO "A14"]
[WhiteElo "2051"]
[BlackElo "2316"]
[PlyCount "51"]
[EventDate "2023.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. 0-0 0-0 6. b3 d4 7. e3 c5 8. exd4 cxd4 9. Bb2 Nc6 10. Re1 Bc5 11. d3 Re8 12. a3 a5 13. Nbd2 h6 14. Ne5 Nxe5 15. Rxe5 Qb6 16. b4 axb4 17. Nb3 Bf8 18. Bxd4 Qc7 19. axb4 Rxa1 20. Qxa1 Bxb4 21. Rb5 Be7 22. Na5 Qd7 23. Nxb7 e5 24. Bxe5 Qxd3 25. Qf1 Qc2 26. Nd6 1/2-1/2

[Event "Prague Summer op-A 10th"]
[Site "Prague"]
[Date "2023.08.06"]
[Round "3"]
[White "Vedder, Henk"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "D01"]
[WhiteElo "2326"]
[BlackElo "2051"]
[PlyCount "69"]
[EventDate "2023.08.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. f3 h6 5. Bh4 c5 6. dxc5 Qa5 7. Qd2 e5 8. e4 dxe4 9. Bb5 Bxc5 10. Bxf6 gxf6 11. 0-0-0 Qd8 12. Nxe4 Be7 13. Ne2 a6 14. Ba4 b5 15. Bb3 Bb7 16. Bxf7+ Kxf7 17. Qxd7 Qxd7 18. Rxd7 Bc6 19. Rc7 Bxe4 20. fxe4 Rhc8 21. Rd7 Rd8 22. Rhd1 Rxd7 23. Rxd7 Ke6 24. Rc7 Rd8 25. Ng3 f5 26. exf5+ Kd6 27. Rc3 Bg5+ 28. Kd1 Ke7+ 29. Rd3 Rxd3+ 30. cxd3 Bf4 31. Ke2 Kf6 32. Kf3 Bxg3 33. Kxg3 Kxf5 34. Kf3 h5 35. g3 1-0

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.22"]
[Round "9"]
[White "Matthaei, Jakob"]
[Black "Papousek, Michal"]
[Result "1-0"]
[ECO "D34"]
[WhiteElo "2078"]
[BlackElo "1758"]
[PlyCount "79"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 e6 3. Bg2 c5 4. Nf3 Nc6 5. 0-0 Be7 6. Nc3 d5 7. cxd5 exd5 8. d4 0-0 9. Bg5 cxd4 10. Nxd4 h6 11. Bf4 Qb6 12. Nb3 Rd8 13. Rc1 d4 14. Na4 Qb5 15. Nac5 Bxc5 16. Rxc5 Qb6 17. Bxc6 bxc6 18. Qc2 Be6 19. Rxc6 Bxb3 20. axb3 Qb5 21. Rc5 d3 22. exd3 Qxd3 23. Qxd3 Rxd3 24. Rc3 Rad8 25. Ra1 Rd1+ 26. Rxd1 Rxd1+ 27. Kg2 Rd7 28. Rc7 Rxc7 29. Bxc7 Kf8 30. Bd6+ Ke8 31. Be5 Ke7 32. Kf3 Ne8 33. Ke4 Ke6 34. Kd4 Nd6 35. Bxd6 Kxd6 36. Kc4 Kc6 37. Kb4 Kb6 38. Ka4 g5 39. g4 f6 40. b4 1-0

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.21"]
[Round "8"]
[White "Cibulka, Josef"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "C49"]
[WhiteElo "2009"]
[BlackElo "2078"]
[PlyCount "85"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. 0-0 0-0 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. h3 Nd8 10. Re1 Ne6 11. Bh4 Nf4 12. d4 Ng6 13. Bg3 h6 14. Rb1 Rb8 15. Bd3 Bd7 16. c4 b6 17. c3 c5 18. Bc2 Rfc8 19. Bb3 Bc6 20. d5 Bd7 21. Ba4 Bxa4 22. Qxa4 Nh5 23. Bh2 Ngf4 24. Bxf4 Nxf4 25. Re3 Rf8 26. Kh2 f5 27. exf5 Rxf5 28. g3 Ng6 29. Qc2 Rbf8 30. Rf1 Qf6 31. Kg1 Rxf3 32. Rxf3 Qxf3 33. Qxg6 Rf6 34. Qc2 Qf5 35. Qxf5 Rxf5 36. Kg2 h5 37. Re1 h4 38. Re4 hxg3 39. Kxg3 Kf7 40. f4 exf4+ 41. Rxf4 Kf6 42. Kg4 Rxf4+ 43. Kxf4 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.20"]
[Round "7"]
[White "Matthaei, Jakob"]
[Black "Lisko, Petr"]
[Result "1-0"]
[ECO "C03"]
[WhiteElo "2078"]
[BlackElo "1499"]
[PlyCount "96"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[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. Nd2 f5 4. exf5 exf5 5. Ngf3 Nf6 6. Bd3 Bd6 7. 0-0 0-0 8. Ne5 c6 9. Ndf3 Ne4 10. c4 Nd7 11. cxd5 cxd5 12. Qb3 Ndf6 13. Be3 Qb6 14. Qxb6 axb6 15. Rfc1 Be6 16. Ne1 Rfc8 17. a3 Nd7 18. N1f3 h6 19. Nxd7 Bxd7 20. Ne5 Be6 21. Bb5 Nf6 22. f3 Rxc1+ 23. Rxc1 Rc8 24. Rxc8+ Bxc8 25. Kf1 Kf8 26. g3 Ke7 27. Ke2 Be6 28. Bf4 Bc8 29. Ng6+ Ke6 30. Be5 Bd7 31. Nf4+ Ke7 32. Bxf6+ gxf6 33. Nxd5+ Ke6 34. Nf4+ Bxf4 35. Bxd7+ Kxd7 36. gxf4 b5 37. Kd3 Kc6 38. b3 h5 39. a4 Kb6 40. Kc3 Kc6 41. Kb4 bxa4 42. bxa4 Kd5 43. Kc3 h4 44. h3 b6 45. Kd3 Kd6 46. Kc4 Kc6 47. d5+ Kd6 48. Kb5 Kxd5 1-0

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.19"]
[Round "6"]
[White "Machacek, Jan"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C29"]
[WhiteElo "2086"]
[BlackElo "2078"]
[PlyCount "55"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. Qf3 f5 6. d3 Nxc3 7. bxc3 d4 8. Qg3 Nc6 9. Be2 Be6 10. c4 Bb4+ 11. Kf2 Qd7 12. Bf4 0-0-0 13. Nf3 h6 14. h4 Bc5 15. h5 Bxc4 16. Nh4 Be6 17. Bf3 Rhg8 18. Rhb1 Bb6 19. a4 a5 20. Rb5 Nb4 21. Ng6 Kb8 22. Bd2 Nd5 23. Bxd5 Bxd5 24. Rxb6 f4 25. Bxf4 Rgf8 26. e6 Bxe6 27. Nxf8 Rxf8 28. Kg1 1-0

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.18"]
[Round "5"]
[White "Matthaei, Jakob"]
[Black "Strebkovs, Andrejs"]
[Result "1/2-1/2"]
[ECO "B06"]
[WhiteElo "2078"]
[BlackElo "2271"]
[PlyCount "157"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 d5 4. exd5 Qxd5 5. d4 Bg7 6. Be3 cxd4 7. cxd4 Qa5+ 8. Nc3 Nh6 9. Bb5+ Bd7 10. Qb3 0-0 11. Bxd7 Nxd7 12. Qxb7 Rfd8 13. 0-0 Rab8 14. Qd5 Qa6 15. Bxh6 Bxh6 16. Rab1 Bg7 17. Qe4 e6 18. Rfd1 Nb6 19. Qe2 Qxe2 20. Nxe2 Bh6 21. Ne5 Rbc8 22. Ng4 Bg7 23. Ne3 Rd7 24. Rd2 Rcd8 25. Rbd1 Bh6 26. f4 Bg7 27. b3 h5 28. g3 Bf8 29. Nc4 Nd5 30. Kf2 f6 31. Kf3 Bb4 32. Rc2 g5 33. a3 Be7 34. b4 Rc7 35. Rdc1 g4+ 36. Kf2 Rcd7 37. Na5 Bd6 38. Nc6 Re8 39. Na5 e5 40. Rc8 Rxc8 41. Rxc8+ Kh7 42. dxe5 fxe5 43. fxe5 Bxe5 44. Nc6 Bc7 45. Ke1 Bb6 46. Re8 Rd6 47. Ne5 Ne3 48. Nf4 Nc2+ 49. Ke2 Nd4+ 50. Kf1 Nf5 51. Nxh5 Rd1+ 52. Ke2 Ra1 53. Nf6+ Kg7 54. Nfxg4 Rxa3 55. Rc8 Nd4+ 56. Kd2 Rb3 57. Rc4 Ra3 58. Nd7 Nf3+ 59. Kc2 Bg1 60. Kb2 Ra6 61. h4 Bd4+ 62. Kc2 Ra3 63. h5 Ne1+ 64. Kd1 Nf3 65. h6+ Kg6 66. Nf8+ Kf7 67. h7 Bh8 68. Rf4+ Kg7 69. Ke2 Ng5 70. Ne3 Nxh7 71. Nxh7 Kxh7 72. Rf7+ Kg6 73. Rd7 Bc3 74. b5 Bb4 75. Nc2 Ra2 76. Kd3 Bc5 77. Rd5 Bb6 78. Kc3 Ra4 79. Kb3 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.17"]
[Round "4"]
[White "Svec, Ludek"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "1614"]
[BlackElo "2078"]
[PlyCount "48"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. g3 b5 4. Bg2 Bb7 5. 0-0 c5 6. a4 b4 7. c4 cxd4 8. b3 Bc5 9. Bb2 Bxf3 10. Bxf3 Nc6 11. Bxc6 dxc6 12. Nd2 Qd6 13. Qc2 0-0 14. Ne4 Nxe4 15. Qxe4 f5 16. Qg2 e5 17. Rad1 Qe6 18. Rd2 Rad8 19. Rfd1 Be7 20. Rd3 c5 21. e4 fxe4 22. Qxe4 Qf5 23. Re1 Qxf2+ 24. Kh1 Qxb2 0-1

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.16"]
[Round "3"]
[White "Matthaei, Jakob"]
[Black "Blazek, Matej"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "2078"]
[BlackElo "1791"]
[PlyCount "82"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. d4 d6 6. Nf3 Nbd7 7. 0-0 e5 8. e4 Ne8 9. Re1 c6 10. dxe5 dxe5 11. Bg5 Bf6 12. Be3 Nc7 13. Qc2 Ne6 14. Rad1 Qc7 15. b4 Be7 16. Rb1 a5 17. a3 Bf6 18. Red1 Nb6 19. Bf1 Nd7 20. b5 g5 21. Bh3 Ndc5 22. Bf5 Rd8 23. Rxd8+ Qxd8 24. bxc6 bxc6 25. Na4 Qe7 26. Nb6 Rb8 27. Kg2 Bb7 28. Qc3 Nd4 29. Nxd4 exd4 30. Bxd4 Nxe4 31. Bxf6 Nxf6 32. Re1 c5+ 33. Kg1 Qd6 34. Qe5 Qxe5 35. Rxe5 Bf3 36. Nd5 Nxd5 37. cxd5 Rd8 38. Bg4 Bxd5 39. Rxg5+ Kf8 40. f4 f6 41. Rh5 Kg7 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.16"]
[Round "2"]
[White "Muller, David"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "1859"]
[BlackElo "2078"]
[PlyCount "74"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Be7 10. Ne2 Nh4 11. Rd1+ Ke8 12. Nxh4 Bxh4 13. Be3 Be7 14. Rd2 Bf5 15. Rad1 Rd8 16. c3 Rxd2 17. Rxd2 a6 18. b3 h5 19. Nd4 Bd7 20. Nf3 Bg4 21. Ng5 Rh6 22. Ne4 Rg6 23. Nc5 Bf3 24. g3 Bxc5 25. Bxc5 Re6 26. Rd3 Rxe5 27. Re3 Rxe3 28. Bxe3 f6 29. h4 Kd7 30. Kf1 b6 31. Ke1 c5 32. c4 Be4 33. Kd2 c6 34. Bf4 g6 35. Kc3 Ke6 36. Bc7 b5 37. Bb6 Kd6 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2023.07.15"]
[Round "1"]
[White "Matthaei, Jakob"]
[Black "Simon, Petr"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "2078"]
[BlackElo "1553"]
[PlyCount "57"]
[EventDate "2023.07.15"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[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. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. a3 a5 7. Bd3 Bd7 8. Bc2 f6 9. 0-0 Rc8 10. Re1 Qc7 11. exf6 Nxf6 12. Bf5 Nd8 13. Ng5 Qb6 14. Nxh7 Be7 15. Bg6+ Nf7 16. Ng5 0-0 17. Bxf7+ Rxf7 18. Nxf7 Kxf7 19. Nd2 cxd4 20. cxd4 Qxd4 21. Nf3 Qb6 22. Ne5+ Ke8 23. Bg5 Bc5 24. Bxf6 Bxf2+ 25. Kh1 gxf6 26. Qh5+ Kd8 27. Nxd7 Kxd7 28. Qf7+ Kd8 29. Rxe6 1-0

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.06.03"]
[Round "9"]
[White "Matthaei, Jakob"]
[Black "Chitsazian, Daniel"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "2046"]
[BlackElo "1900"]
[PlyCount "111"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. Nf3 Nd7 7. Bc4 e6 8. 0-0 Ngf6 9. Re1 Be7 10. c3 b5 11. Bf1 h6 12. Ne2 Nd5 13. Nf4 Nxf4 14. Bxf4 0-0 15. Qd2 Bf6 16. a4 a6 17. a5 c5 18. d5 Bf5 19. c4 exd5 20. cxd5 Rc8 21. Bd6 Re8 22. Rxe8+ Qxe8 23. Re1 Qd8 24. Ne5 Nxe5 25. Bxe5 Bg5 26. f4 Be7 27. g4 Bxg4 28. Qg2 f6 29. Qxg4 fxe5 30. Qe6+ Kh8 31. fxe5 Bh4 32. Re4 Qg5+ 33. Qg4 Qxg4+ 34. Rxg4 Bg5 35. Re4 Rd8 36. d6 c4 37. h4 Bf6 38. exf6 gxf6 39. Rd4 Kg7 40. Bg2 b4 41. Rxc4 Rxd6 42. Rxb4 Rd1+ 43. Kh2 Ra1 44. Rb7+ Kg6 45. b4 Kh5 46. Kg3 Kg6 47. Be4+ f5 48. Rb6+ Kg7 49. Bxf5 Rg1+ 50. Kf4 Rf1+ 51. Ke5 Re1+ 52. Be4 h5 53. Rb7+ Kh8 54. b5 Ra1 55. Kf6 Rf1+ 56. Bf5 1-0

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.06.02"]
[Round "8"]
[White "Lutz, Ruben"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2211"]
[BlackElo "2046"]
[PlyCount "59"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. Nbd2 d5 5. e3 0-0 6. Bd3 h6 7. Bh4 c5 8. c3 Nc6 9. 0-0 Nd7 10. Bxe7 Qxe7 11. Re1 c4 12. Bc2 f5 13. b3 cxb3 14. Bxb3 b5 15. a4 b4 16. c4 dxc4 17. Nxc4 Nf6 18. a5 Bd7 19. Qd3 Rfc8 20. Ncd2 Kh8 21. e4 Qd8 22. exf5 exf5 23. d5 Nxa5 24. Ne5 Rc3 25. Qa6 Nxb3 26. Nf7+ Kh7 27. Nxd8 Nxa1 28. Qxa1 Rxd8 29. Qxa7 Bb5 30. Qa5 1/2-1/2

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.06.01"]
[Round "7"]
[White "Matthaei, Jakob"]
[Black "Pikalow, Michael"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "2046"]
[BlackElo "2147"]
[PlyCount "90"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3 Qxd5 5. Be2 Nc6 6. 0-0 0-0-0 7. c4 Qh5 8. Nc3 e5 9. d5 Nd4 10. Nxd4 exd4 11. Bxg4+ Nxg4 12. h3 dxc3 13. Qxg4+ Qxg4 14. hxg4 h5 15. g5 Re8 16. bxc3 Re4 17. Be3 Rxc4 18. Bd4 Be7 19. Bxg7 Rg8 20. Rae1 Bxg5 21. Bd4 Kd7 22. Re5 Bf6 23. Rxh5 Bxd4 24. cxd4 Rxd4 25. Rf5 Rg7 26. Re1 Rd2 27. a4 Rd4 28. a5 Ra4 29. Rb1 Kc8 30. d6 cxd6 31. Rc1+ Kd7 32. Rb5 Ke6 33. Re1+ Kf6 34. Rd5 Rg5 35. Rxd6+ Kg7 36. Rd7 Rgxa5 37. Rxb7 Ra1 38. Rxa1 Rxa1+ 39. Kh2 a5 40. Ra7 a4 41. Ra6 Ra2 42. Kg3 Ra3+ 43. f3 Ra2 44. Kh2 a3 45. Kg3 Ra1 1/2-1/2

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.31"]
[Round "6"]
[White "Bui, Bao Anh Le"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2136"]
[BlackElo "2046"]
[PlyCount "94"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. Nbd2 d5 7. exd5 Nxd5 8. 0-0 Bg4 9. h3 Bh5 10. Ne4 Be7 11. Ng3 Bg6 12. Re1 Bf6 13. Ne4 Bxe4 14. dxe4 Nb6 15. Bb5 Qxd1 16. Rxd1 Rfd8 17. Rxd8+ Rxd8 18. Be3 Ne7 19. a4 Nbc8 20. Be2 Ng6 21. g3 Be7 22. a5 a6 23. Ra4 Kf8 24. c4 c6 25. h4 f6 26. Nd2 Ke8 27. Bg4 Nf8 28. h5 Kf7 29. f4 Ne6 30. fxe5 fxe5 31. Nf3 Kf6 32. Ra1 Bc5 33. Bxc5 Nxc5 34. Rf1 Nd6 35. b4 Ncxe4 36. Nd4+ Ke7 37. Ne6 Rg8 38. Re1 Nf6 39. Bh3 Nde4 40. Nc5 Nxc5 41. bxc5 e4 42. Bf5 Kf7 43. Rb1 Rb8 44. Kf2 g6 45. hxg6+ hxg6 46. Bh3 Ke7 47. Ke3 Kf7 1/2-1/2

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.31"]
[Round "5"]
[White "Weihrauch, Jakob"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2291"]
[BlackElo "2046"]
[PlyCount "146"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. 0-0 0-0 6. Re1 d6 7. c3 Bb6 8. h3 Be6 9. Nbd2 Qe7 10. Bxe6 fxe6 11. Nc4 Nd7 12. d4 exd4 13. cxd4 e5 14. Nxb6 Nxb6 15. d5 Nb8 16. Ng5 N8d7 17. Ne6 Rfc8 18. Bg5 Qf7 19. Qg4 Nf8 20. f4 h5 21. Qh4 Nxe6 22. dxe6 Qxe6 23. f5 Qf7 24. g4 hxg4 25. hxg4 Kf8 26. f6 g6 27. Qh8+ Qg8 28. Bh6+ Kf7 29. Qg7+ Qxg7 30. fxg7 Nd7 31. Rf1+ Ke7 32. Rf3 Rg8 33. Raf1 Rae8 34. Rf7+ Ke6 35. Rf8 Rexf8 36. gxf8Q Nxf8 37. Bxf8 g5 38. Rf5 Rg6 39. Kf2 Kd7 40. Ke3 Ke6 41. Kd3 Kd7 42. Kc3 Ke6 43. Kc4 a6 44. Kb4 Kd7 45. Ka5 Ke6 46. a4 Kd7 47. Kb4 Ke6 48. Kc4 b6 49. Kb4 Kd7 50. Kc3 Ke6 51. Kc4 Kd7 52. Rf7+ Ke8 53. Rg7 Re6 54. Rg8 Kf7 55. Rh8 c6 56. Rh6 Rxh6 57. Bxh6 Kf6 58. Kc3 d5 59. Kd3 d4 60. Bf8 b5 61. a5 Kf7 62. Bc5 Ke6 63. b4 Kf6 64. Bb6 Ke7 65. Bc7 Ke6 66. Bd8 Kd6 67. Bxg5 c5 68. bxc5+ Kxc5 69. Be7+ Kc6 70. g5 Kd7 71. Bf6 Ke6 72. Bd8 Kf7 73. Bc7 Ke6 1-0

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.30"]
[Round "4"]
[White "Matthaei, Jakob"]
[Black "Wurmbauer, Nils"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "2046"]
[BlackElo "1995"]
[PlyCount "87"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Bg4 6. h3 Bh5 7. d3 f6 8. Be3 Bd6 9. Nbd2 Ne7 10. Nb3 b6 11. Qe2 c5 12. c3 Qd7 13. Rfd1 Qb5 14. Rab1 0-0 15. Nbd2 Kh8 16. b3 g5 17. Nc4 Qe8 18. d4 g4 19. hxg4 Bxg4 20. dxc5 Bxc5 21. Bxc5 bxc5 22. Ne3 Bh5 23. Nd5 Ng6 24. Qe3 c6 25. Nc7 Qc8 26. Nxa8 Nf4 27. Ne1 Qg4 28. Rd2 Rg8 29. f3 Qg3 30. Rbd1 Qg5 31. Kf1 Qh4 32. Rd8 Be8 33. Nc7 Nh5 34. Ke2 Ng3+ 35. Kd3 Nf1 36. Qe2 Ng3 37. Qf2 Bg6 38. Rxg8+ Kxg8 39. Kc2 Qf4 40. Ne6 Nxe4 41. Nxf4 Nxf2+ 42. Nxg6 Nxd1 43. Kxd1 hxg6 44. c4 1-0

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.29"]
[Round "3"]
[White "Matthaei, Jakob"]
[Black "Hommer, Jeremy"]
[Result "0-1"]
[ECO "A20"]
[WhiteElo "2046"]
[BlackElo "2313"]
[PlyCount "100"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. c4 e5 2. g3 c6 3. Nf3 e4 4. Nd4 d5 5. cxd5 Qxd5 6. Nc2 Nf6 7. Nc3 Qe5 8. Ne3 Bb4 9. Bg2 0-0 10. Qc2 Re8 11. 0-0 Na6 12. a3 Bxc3 13. bxc3 Qh5 14. Re1 Nc5 15. a4 Ng4 16. Nxg4 Bxg4 17. Ba3 Ne6 18. d4 exd3 19. exd3 Ng5 20. f4 Nf3+ 21. Bxf3 Bxf3 22. Qf2 Qd5 23. Qd4 Rxe1+ 24. Rxe1 Qa2 25. Qf2 Qxa3 26. Qxf3 Qxc3 27. Qe3 h6 28. d4 Qb4 29. Qe5 Rd8 30. Re4 Qxa4 31. f5 Qa1+ 32. Kg2 Qa2+ 33. Kh3 Qd5 34. Qf4 Qd7 35. g4 Re8 36. Re5 f6 37. Rxe8+ Qxe8 38. Qc7 Qa8 39. Kg3 a5 40. h4 a4 41. g5 hxg5 42. hxg5 fxg5 43. Qe7 Qf8 44. Qe6+ Qf7 45. Qc8+ Kh7 46. f6 gxf6 47. Qa8 Qb3+ 48. Kg4 Qe6+ 49. Kg3 b5 50. Qb7+ Kg6 0-1

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.28"]
[Round "1"]
[White "Matthaei, Jakob"]
[Black "Musiolik, David"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2046"]
[BlackElo "2291"]
[PlyCount "70"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Ng3 h5 6. h4 Bg4 7. Be2 Nbd7 8. Be3 e6 9. Qd2 Bd6 10. Bf4 Be7 11. f3 Bf5 12. Nxf5 exf5 13. c4 b5 14. d5 cxd5 15. cxd5 Bc5 16. b4 Bxg1 17. Rxg1 0-0 18. 0-0-0 Nb6 19. d6 Nfd5 20. Be5 Re8 21. f4 f6 22. Bf3 Rc8+ 23. Kb1 Nxb4 24. Qxb4 fxe5 25. Qb3+ Rc4 26. Bxh5 Re6 27. fxe5 Rxe5 28. Rge1 Rxe1 29. Rxe1 Qxh4 30. Re8+ Kh7 31. Qd1 Na4 32. Re3 Rb4+ 33. Kc1 Qc4+ 34. Kd2 Rb2+ 35. Ke1 Qh4+ 0-1

[Event "GER-ch U18"]
[Site "Willingen"]
[Date "2023.05.28"]
[Round "2"]
[White "Neugirg, Mika"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "A04"]
[WhiteElo "1781"]
[BlackElo "2046"]
[PlyCount "73"]
[EventDate "2023.05.28"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 214 Extra"]
[Source "ChessBase"]
[SourceDate "2023.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2023.07.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 c5 3. Bg2 Nc6 4. 0-0 e5 5. e4 d6 6. c3 Bg4 7. h3 Bh5 8. Re1 Be7 9. d3 Qd7 10. Kh2 0-0-0 11. Qa4 Kb8 12. Be3 Bxf3 13. Bxf3 Nd4 14. Qd1 Nxf3+ 15. Qxf3 Qb5 16. Qe2 Qc6 17. Bg5 Rhe8 18. Bxf6 Bxf6 19. c4 Rd7 20. Nc3 Bd8 21. Nd5 f6 22. a3 Rf7 23. b4 Ref8 24. bxc5 Qxc5 25. Ne3 g6 26. Reb1 Bb6 27. Rb5 Qc6 28. Rab1 Bc5 29. R1b3 a6 30. Ra5 Ka7 31. Rbb5 b6 32. Ra4 Kb7 33. Rbb4 Bxb4 34. Rxb4 Ka7 35. Nd5 Rb7 36. Qc2 f5 37. Qb3 0-1

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2021.07.24"]
[Round "9"]
[White "Matthaei, Jakob"]
[Black "Sykora, Ondrej"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "1927"]
[BlackElo "2099"]
[PlyCount "129"]
[EventDate "2021.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nf6 8. 0-0 0-0 9. Nc3 Nxe4 10. Nxe4 d5 11. Bg5 Qd7 12. Nc5 Bxc5 13. Bb5 Bb6 14. Rc1 Qd6 15. Re1 f6 16. Bh4 Ne7 17. Bg3 Qd8 18. Bd3 c6 19. Qc2 g6 20. Re2 Nf5 21. Bf4 Rf7 22. g4 Ng7 23. Rce1 Bd7 24. Kg2 Ba5 25. Bd2 Bxd2 26. Nxd2 Qf8 27. Nf3 Re8 28. Qa4 a6 29. Qb3 Bc8 30. Rxe8 Nxe8 31. Qc2 Re7 32. Rxe7 Qxe7 33. Qe2 Qxe2 34. Bxe2 g5 35. Nd2 a5 36. Bd3 Nd6 37. f4 h6 38. f5 h5 39. Kf3 Kf7 40. Nf1 h4 41. Nd2 Ke7 42. a3 b6 43. b4 axb4 44. axb4 Ne8 45. Nb3 Kd6 46. Ke3 Nc7 47. Kd2 Ba6 48. Nc1 Bxd3 49. Nxd3 Nb5 50. Ke3 Na3 51. Kd2 Kc7 52. Nc1 Nc4+ 53. Kc3 Nd6 54. Kd2 Ne4+ 55. Ke3 Kb7 56. Ke2 Ka6 57. Nd3 Kb5 58. Kf3 Kc4 59. Ke3 Kc3 60. Ne5 Kxb4 61. Nxc6+ Kc3 62. Ne7 Kc4 63. Nc8 b5 64. Nb6+ Kb3 65. Nxd5 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2021.07.20"]
[Round "5"]
[White "Kratochvil, Josef"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2212"]
[BlackElo "1927"]
[PlyCount "75"]
[EventDate "2021.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. Qe2 Bc5 5. c3 d6 6. d4 exd4 7. cxd4 Bb4+ 8. Nc3 0-0 9. Bxc6 bxc6 10. Bg5 Qe7 11. e5 dxe5 12. dxe5 Qc5 13. 0-0 Bxc3 14. exf6 Bxf6 15. Bxf6 gxf6 16. Rac1 Qb5 17. Qd2 Be6 18. Nd4 Qd5 19. Rc3 Kh8 20. Qf4 f5 21. Re1 Rg8 22. Rg3 Rxg3 23. hxg3 Rd8 24. Nxe6 fxe6 25. Qxc7 Kg8 26. Qxa7 Qd2 27. Qe3 Qxe3 28. Rxe3 Rd1+ 29. Kh2 Rd2 30. Rb3 Rxf2 31. a4 Rd2 32. a5 Rd7 33. Rb6 c5 34. Rxe6 Ra7 35. a6 Kf7 36. Rh6 Kg7 37. Rb6 Kf8 38. Rb8+ 1-0

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2021.07.19"]
[Round "4"]
[White "Matthaei, Jakob"]
[Black "Kucera, Petr3"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "1927"]
[BlackElo "2256"]
[PlyCount "34"]
[EventDate "2021.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. c4 c6 2. g3 d5 3. Nf3 Nf6 4. Bg2 g6 5. 0-0 Bg7 6. d3 0-0 7. Nc3 dxc4 8. dxc4 Be6 9. Qb3 Qc8 10. Ng5 Bd7 11. Rd1 Na6 12. Nce4 Bf5 13. Nxf6+ exf6 14. Nf3 Be4 15. Bf4 Re8 16. Rd2 Nc5 17. Qa3 Ne6 1/2-1/2

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2021.07.18"]
[Round "2"]
[White "Kucera, Petr"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "D26"]
[WhiteElo "2214"]
[BlackElo "1927"]
[PlyCount "58"]
[EventDate "2021.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3 a6 6. Bxc4 b5 7. Bd3 Bb7 8. 0-0 Nbd7 9. a4 b4 10. Nb1 Be7 11. Nbd2 0-0 12. e4 c5 13. e5 Nd5 14. Ne4 cxd4 15. Qe2 h6 16. Rd1 Qb8 17. Ng3 Nc5 18. Nxd4 Nxd3 19. Rxd3 Rc8 20. Nh5 Bf8 21. Rg3 Kh8 22. Bxh6 gxh6 23. Qg4 Ne7 24. Qf4 f5 25. Nxe6 Rc6 26. Nd4 Rg6 27. Rxg6 Nxg6 28. Qxf5 Qe8 29. Re1 Bg7 0-1

[Event "Liberec Desko op"]
[Site "Liberec"]
[Date "2021.07.18"]
[Round "3"]
[White "Matthaei, Jakob"]
[Black "Belaska, Premysl"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1927"]
[BlackElo "2205"]
[PlyCount "39"]
[EventDate "2021.07.17"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "CBM 203 Extra"]
[Source "ChessBase"]
[SourceDate "2021.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2021.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 g6 6. Be3 cxd4 7. cxd4 Bg7 8. Nc3 Qd8 9. Bc4 Nh6 10. d5 Nb8 11. Bd4 0-0 12. 0-0 Nd7 13. Bxg7 Kxg7 14. Re1 Nf6 15. Qe2 Re8 16. Rad1 a6 17. Ne5 Nhg4 18. h3 Nxe5 19. Qxe5 Qd6 20. Qd4 1/2-1/2

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "2.1"]
[White "Colbow, Collin"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2339"]
[BlackElo "1919"]
[PlyCount "73"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Chemnitz"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d4 Bxd4 5. Nxd4 Nxd4 6. Be3 Nc6 7. Qg4 Qf6 8. Nc3 d5 9. Qg3 dxc4 10. Nd5 Qg6 11. Nxc7+ Kf8 12. Qxg6 hxg6 13. Nxa8 Nf6 14. f3 Ne8 15. 0-0-0 b6 16. f4 Bb7 17. Nc7 Nxc7 18. Rd7 exf4 19. Bxf4 Rh4 20. Bd6+ Kg8 21. Rxc7 Na5 22. Bb4 Bxe4 23. Bxa5 bxa5 24. Rxc4 g5 25. g3 Bxh1 26. gxh4 gxh4 27. Rxh4 g5 28. Ra4 f5 29. Rxa5 Be4 30. Rxa7 f4 31. Ra5 f3 32. Rxg5+ Kf7 33. Rg4 Bd5 34. Kd2 Kf6 35. Ke3 Kf5 36. Rf4+ Ke5 37. Rxf3 1-0

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "6.1"]
[White "Hommel, Niclas"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C52"]
[WhiteElo "2062"]
[BlackElo "1919"]
[PlyCount "105"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Oberschoeneweide"]
[BlackTeam "Chemnitz"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 Bxb4 5. c3 Ba5 6. d4 d6 7. Qb3 Qd7 8. 0-0 Bb6 9. Nbd2 Na5 10. Qc2 Nxc4 11. Nxc4 Qe6 12. Qb3 f6 13. a4 c6 14. Ba3 Bc7 15. Nxd6+ Bxd6 16. Qxe6+ Bxe6 17. Bxd6 exd4 18. cxd4 Rd8 19. Bf4 Bg4 20. Rab1 b6 21. Rb4 Bxf3 22. gxf3 Ne7 23. Be3 Kf7 24. a5 b5 25. f4 a6 26. f5 Rd7 27. Rb2 g6 28. fxg6+ hxg6 29. Rc1 Rh4 30. f3 f5 31. Bg5 Rh5 32. Bxe7 Rxe7 33. e5 Re6 34. Rbc2 Rh4 35. Rxc6 Rxd4 36. Rc7+ Re7 37. Rxe7+ Kxe7 38. Rc6 Rd5 39. Rxa6 g5 40. Ra8 Rxe5 41. a6 b4 42. a7 Ra5 43. Rh8 Ra1+ 44. Kf2 Ra2+ 45. Ke3 f4+ 46. Kd4 g4 47. a8Q Rxa8 48. Rxa8 gxf3 49. Ra1 b3 50. Kc3 Kf6 51. Kxb3 Kg5 52. Rf1 Kg4 53. Kc3 1-0

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "5.1"]
[White "Matthaei, Jakob"]
[Black "Burns, Mikala Tristan"]
[Result "1-0"]
[ECO "A24"]
[WhiteElo "1919"]
[BlackElo "1574"]
[PlyCount "89"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz"]
[BlackTeam "Dresden Gruen Weiss"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 0-0 5. d3 d6 6. Rb1 e5 7. b4 c6 8. b5 d5 9. bxc6 bxc6 10. cxd5 cxd5 11. Bg5 Qa5 12. Qd2 Be6 13. Bxf6 Bxf6 14. Nxd5 Qxd2+ 15. Kxd2 Bxd5 16. Bxd5 Na6 17. Bxa8 Rxa8 18. Nf3 Rd8 19. Rhc1 e4 20. Ne1 Bg5+ 21. e3 exd3 22. Rc6 Nb8 23. Rc7 Na6 24. Rc3 Bf6 25. Rxd3 Rc8 26. Rd6 Bc3+ 27. Ke2 Nb4 28. Nd3 Nxa2 29. Rd7 Bf6 30. Rbb7 Nc3+ 31. Kf3 Rf8 32. Rxa7 Bh8 33. Nf4 g5 34. Nd5 Nxd5 35. Rxd5 f5 36. Rdd7 g4+ 37. Kg2 h6 38. Ra6 Bg7 39. h4 Kh8 40. Rg6 Rg8 41. h5 Bf8 42. Rf7 Rxg6 43. hxg6 Bg7 44. Rxf5 Kg8 45. e4 1-0

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "1.1"]
[White "Matthaei, Jakob"]
[Black "Duong, Quang Bach"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "1919"]
[BlackElo "1440"]
[PlyCount "51"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz"]
[BlackTeam "Nuernberg"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 c6 2. g3 d5 3. Nf3 Nf6 4. Bg2 dxc4 5. 0-0 Nbd7 6. Qc2 Nb6 7. Na3 Be6 8. Ng5 Bd5 9. e4 h6 10. exd5 hxg5 11. dxc6 Qd4 12. cxb7 Rb8 13. Nb5 Qd7 14. Nxa7 Kd8 15. Nc6+ Kc7 16. Nxb8 Kxb8 17. a4 e5 18. a5 Nbd5 19. a6 Bc5 20. Qxc4 Ba7 21. b4 e4 22. Bb2 Qf5 23. Bd4 Nb6 24. Qc3 Ng4 25. h3 Nf6 26. Be5+ 1-0

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "3.1"]
[White "Matthaei, Jakob"]
[Black "Wehrstedt, Raphael"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "1919"]
[BlackElo "1592"]
[PlyCount "57"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz"]
[BlackTeam "Eppendorf Johanneum"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 c5 2. g3 Nc6 3. Bg2 g6 4. Nc3 Bg7 5. a3 e6 6. e3 Nge7 7. Nge2 0-0 8. 0-0 d5 9. cxd5 exd5 10. d4 cxd4 11. exd4 Bg4 12. h3 Be6 13. g4 Na5 14. Nf4 Qb6 15. Be3 Qxb2 16. Na4 Qb5 17. Rb1 Qc6 18. Rc1 Nc4 19. Nc5 b6 20. Rxc4 bxc5 21. Rxc5 Qd6 22. Qa4 Rfc8 23. Rfc1 Rxc5 24. Rxc5 Rc8 25. Qxa7 Rxc5 26. dxc5 Qd8 27. Nxe6 fxe6 28. Qb6 d4 29. Qxd8+ 1-0

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "4.1"]
[White "Mehlhorn, David"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "1557"]
[BlackElo "1919"]
[PlyCount "92"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Aschheim/Feldkirchen/Kirchheim"]
[BlackTeam "Chemnitz"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Qe7 6. cxd4 d6 7. Bb5 Bd7 8. 0-0 dxe5 9. dxe5 Nxe5 10. Nxe5 Bxb5 11. Re1 Rd8 12. Qb3 Bc6 13. Bd2 Bd5 14. Qa4+ c6 15. Nxc6 Bxc6 16. Rxe7+ Bxe7 17. Qc2 Nd5 18. Na3 0-0 19. Nc4 Nb4 20. Bxb4 Bxb4 21. a3 Be7 22. Re1 Bf6 23. Ne3 Rfe8 24. h3 Re6 25. Rc1 Bg5 26. Qc5 Bxe3 27. fxe3 Rd2 28. Rc2 Rxc2 29. Qxc2 Rxe3 30. Qf2 Re6 31. Qxa7 g6 32. Qf2 h5 33. b3 Rd6 34. a4 Rd3 35. Qb2 Rg3 36. Kh2 Rxg2+ 37. Qxg2 Bxg2 38. Kxg2 Kf8 39. Kf3 Ke7 40. Kf4 Kd6 41. b4 Kd5 42. Kg5 Kc4 43. b5 Kb4 44. Kf6 Kxa4 45. Kxf7 g5 46. Kg6 g4 0-1

[Event "GER-chT Christmas U16 Steinitz"]
[Site "Playchess.com INT"]
[Date "2020.12.28"]
[Round "7.1"]
[White "Moeller, Maurin"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "C56"]
[WhiteElo "1627"]
[BlackElo "1919"]
[PlyCount "116"]
[EventDate "2020.12.28"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 200 Extra"]
[Source "ChessBase"]
[SourceDate "2021.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.03.31"]
[SourceQuality "1"]
[WhiteTeam "Paderborn Blauer Springer"]
[BlackTeam "Chemnitz"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 d5 6. Bb5 Ne4 7. 0-0 Bd7 8. Bxc6 Bxc6 9. Nxd4 Bd7 10. f3 Ng5 11. Nc3 c6 12. f4 Ne4 13. Nxe4 dxe4 14. Kh1 c5 15. Ne2 Bb5 16. Qxd8+ Rxd8 17. Be3 Bxe2 18. Rfe1 Bb5 19. b3 Be7 20. c4 Bc6 21. g3 Rd3 22. Kg2 Kd7 23. Kf2 Kc8 24. Ke2 Rhd8 25. Rac1 h5 26. Rc2 a5 27. h4 a4 28. Rb2 axb3 29. axb3 Rc3 30. Ra1 Rdd3 31. Ra8+ Kc7 32. Bf2 Rxb3 33. Rba2 Rdc3 34. Rg8 g6 35. Rg7 Bd7 36. Ra1 Rb2+ 37. Kf1 Rf3 38. Rxf7 Rfxf2+ 39. Kg1 Rg2+ 40. Kh1 Bc6 41. Rxe7+ Kb6 42. Re6 e3 43. Rxc6+ Kxc6 44. Rd1 Rbd2 45. Re1 Rxg3 46. e6 Kd6 47. e7 Kxe7 48. f5 Rd4 49. Kh2 Rf3 50. fxg6 Rxh4+ 51. Kg2 Rf2+ 52. Kg3 Rg4+ 53. Kh3 Rf3+ 54. Kh2 Rxg6 55. Re2 Kf6 56. Kh1 Rf4 57. Rf2 exf2 58. Kh2 Rh4# 0-1

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.08.06"]
[Round "7.3"]
[White "Matthaei, Jakob"]
[Black "Hansch, Torsten"]
[Result "0-1"]
[ECO "E06"]
[WhiteElo "1956"]
[BlackElo "2064"]
[PlyCount "70"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Stendal"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. 0-0 0-0 6. cxd5 exd5 7. d4 c6 8. Nc3 Bf5 9. Qb3 Qb6 10. Qxb6 axb6 11. Ne5 Nbd7 12. f4 b5 13. h3 h5 14. Kh2 b4 15. Nd1 Nb6 16. Nf2 Ra4 17. g4 hxg4 18. hxg4 Bc2 19. g5 Nfd7 20. Nxd7 Nxd7 21. Be3 Rfa8 22. Rac1 Bf5 23. Kg3 Rxa2 24. Rh1 Rxb2 25. Bh3 g6 26. Bxf5 gxf5 27. Rh5 Rxe2 28. Kf3 Rea2 29. Rch1 Nf8 30. Nd3 R8a3 31. Ne5 c5 32. g6 fxg6 33. Rh8+ Kg7 34. Rxf8 Bxf8 35. Rg1 cxd4 0-1

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.29"]
[Round "6.3"]
[White "Gerst, Michael"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "E13"]
[WhiteElo "1901"]
[BlackElo "1956"]
[PlyCount "108"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Oberhausen SV"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. Bg5 Bb7 6. e3 0-0 7. Bd3 h6 8. Bh4 d6 9. Qc2 Nbd7 10. 0-0 Bxc3 11. Qxc3 Qe7 12. Rfe1 Rfe8 13. Qc2 e5 14. Bf5 Rad8 15. d5 Nf8 16. Nd2 g5 17. Bg3 Kg7 18. e4 Bc8 19. Bxc8 Rxc8 20. Nf1 Qd7 21. Ne3 Ng6 22. f3 Nh5 23. Rac1 a5 24. b3 Nhf4 25. Bxf4 gxf4 26. Nf5+ Kh7 27. Qf2 Ne7 28. Nxe7 Qxe7 29. Kh1 Rg8 30. Rg1 Rg6 31. g3 fxg3 32. Rxg3 Rxg3 33. hxg3 Rg8 34. Rg1 Qg5 35. Rg2 f5 36. exf5 Qxf5 37. g4 Qf4 38. Qg3 Rf8 39. Qxf4 Rxf4 40. Rg3 Kg6 41. Kg2 Rd4 42. Kh3 Kg5 43. Rg2 Kf4 44. Rf2 a4 45. Kg2 axb3 46. axb3 Rd3 47. Ra2 Rxf3 48. Ra7 Rxb3 49. Rxc7 Kxg4 50. Rc6 Rb2+ 51. Kf1 Kf3 52. Kg1 Rg2+ 53. Kf1 Rc2 54. Rxd6 Rc1# 0-1

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.23"]
[Round "5.3"]
[White "Matthaei, Jakob"]
[Black "Grkinic, Goran"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1956"]
[BlackElo "1979"]
[PlyCount "94"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Arnstadt Stadtilm"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. c3 d6 3. d4 cxd4 4. cxd4 g6 5. Nc3 Bg7 6. Be3 Nc6 7. Nf3 Bg4 8. Be2 e6 9. 0-0 Nge7 10. Qd2 0-0 11. Rfd1 d5 12. h3 dxe4 13. hxg4 exf3 14. Bxf3 Qa5 15. a3 a6 16. b4 Qc7 17. Rac1 Rad8 18. Na4 Qb8 19. Qb2 Nd5 20. Nc5 Qa7 21. Qe2 Nce7 22. Rc2 Nxe3 23. fxe3 Nd5 24. Kh1 Bh6 25. Rd3 b6 26. Ne4 f5 27. gxf5 exf5 28. Nc3 Nxc3 29. Rdxc3 Rf7 30. Qc4 Kg7 31. d5 b5 32. Qc5 Qe7 33. Qb6 Rd6 34. Rc6 Qh4+ 35. Kg1 Qe1+ 36. Kh2 Bxe3 37. Qxe3 Qxe3 38. Rxd6 Qf4+ 39. Kg1 Qxd6 40. Rc6 Qe5 41. Rxa6 Rc7 42. Rc6 Rxc6 43. dxc6 Qa1+ 44. Kh2 Qxa3 45. Bd5 Qxb4 46. Kh1 Qe1+ 47. Kh2 Qe5+ 0-1

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.16"]
[Round "4.3"]
[White "Kramer, Melik Kurt"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2065"]
[BlackElo "1956"]
[PlyCount "91"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Ebersberg Grafing"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. Bf4 d5 3. e3 c5 4. Nf3 Nc6 5. c3 Qb6 6. Qc2 e6 7. h3 Bd7 8. Nbd2 Rc8 9. Qb3 Qxb3 10. axb3 Be7 11. dxc5 Bxc5 12. b4 Bb6 13. b5 Na5 14. Bd6 Nc4 15. Bb4 Nxd2 16. Nxd2 e5 17. Nf3 e4 18. Nd4 Be6 19. Be2 Rc7 20. Kd2 Bxd4 21. exd4 b6 22. Ra2 Kd7 23. Rha1 Ra8 24. Ra6 Rb7 25. R6a2 Ne8 26. Ra6 f5 27. b3 Nc7 28. R6a2 Bf7 29. c4 Ke8 30. f3 Ne6 31. Kc3 Nf4 32. Bf1 dxc4 33. bxc4 Rc8 34. fxe4 fxe4 35. Re1 Nd5+ 36. Kb3 Nxb4 37. Kxb4 Re7 38. Re3 Kf8 39. Be2 h6 40. d5 Rc5 41. Rea3 e3 42. Rxa7 Re4 43. Kb3 Rf4 44. Rb7 Rf2 45. Ra8+ Be8 46. Bh5 1-0

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.09"]
[Round "3.3"]
[White "Matthaei, Jakob"]
[Black "Buehrmann, Torsten"]
[Result "1/2-1/2"]
[ECO "C04"]
[WhiteElo "1956"]
[BlackElo "1909"]
[PlyCount "73"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Chemnitz USG"]
[BlackTeam "Lehrte"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 e5 5. exd5 Qxd5 6. Qe2 Be6 7. dxe5 Nxe5 8. Ngf3 Nxf3+ 9. Nxf3 0-0-0 10. Be3 Bc5 11. Nd4 Bd7 12. Qc4 Nf6 13. Be2 Rhe8 14. 0-0-0 Bg4 15. Qxd5 Rxd5 16. Rhe1 Bxe2 17. Rxe2 Ng4 18. Rde1 Rde5 19. Kd2 Kd7 20. h3 Nxe3 21. Rxe3 Rxe3 22. Rxe3 Rxe3 23. Kxe3 g6 24. Ke4 c6 25. g4 Ke7 26. f4 a5 27. a4 Kd6 28. Nb3 Bb6 29. f5 Bd8 30. fxg6 fxg6 31. Nd4 Bf6 32. b3 b6 33. Ne2 Ke6 34. Nf4+ Kd6 35. Ne2 Ke6 36. Nf4+ Kd6 37. Ne2 1/2-1/2

[Event "DSOL 02 Liga Gr-D 1st"]
[Site "Playchess.com INT"]
[Date "2020.06.25"]
[Round "1.4"]
[White "Varma, Christopher"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C49"]
[WhiteElo "1864"]
[BlackElo "1956"]
[PlyCount "71"]
[EventDate "2020.06.22"]
[EventType "team-tourn (rapid)"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Oberursel"]
[BlackTeam "Chemnitz USG"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. 0-0 0-0 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Bg4 10. h3 Bh5 11. g4 Bg6 12. Nd2 Nd8 13. d4 Ne6 14. Be3 Nxe4 15. Nxe4 Bxe4 16. f3 Bg6 17. dxe5 dxe5 18. Qe2 Qh4 19. Qh2 c6 20. Bf1 Qf6 21. Qg3 Qf4 22. Bxf4 exf4 23. Qf2 Rad8 24. h4 h5 25. Rad1 a6 26. Bc4 Kh7 27. Rxd8 Rxd8 28. Bxe6 fxe6 29. Rxe6 hxg4 30. fxg4 Rd1+ 31. Re1 Rd6 32. h5 Bf7 33. Qxf4 Rf6 34. Qe4+ Kh6 35. Rf1 Bd5 36. Rxf6+ 1-0

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.15"]
[Round "7.1"]
[White "Arriens, Damien"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "A14"]
[WhiteElo "1934"]
[BlackElo "1620"]
[PlyCount "90"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Ottweiler Gymn"]
[BlackTeam "Hohe Lessing Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. 0-0 0-0 6. b3 c5 7. e3 Nc6 8. Bb2 b6 9. Re1 Bb7 10. cxd5 exd5 11. d4 Ne4 12. Nc3 Nxc3 13. Bxc3 Bf6 14. Rc1 Rc8 15. Ne5 Nxe5 16. dxe5 Be7 17. Qg4 Kh8 18. Bb2 Rc7 19. Red1 Rg8 20. Qh5 Rd7 21. Bh3 Rc7 22. Bf1 Bc8 23. Bg2 Be6 24. Bf1 g6 25. Qf3 h6 26. Bg2 Rd7 27. Qe2 Kh7 28. Rd2 Qb8 29. Rcd1 Rgd8 30. h3 Bf8 31. Kh2 Bg7 32. f4 h5 33. Bf3 b5 34. Bxh5 gxh5 35. Qxh5+ Kg8 36. f5 Bxf5 37. Qxf5 Qb6 38. Rf2 Qe6 39. Qxe6 fxe6 40. Rdf1 d4 41. exd4 cxd4 42. Re1 d3 43. Rd2 Bh6 44. Red1 Bxd2 45. Rxd2 Rc8 0-1

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.15"]
[Round "5.1"]
[White "Brockhoff, Moritz"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C38"]
[WhiteElo "1838"]
[BlackElo "1620"]
[PlyCount "172"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Theodor Gymn"]
[BlackTeam "Hohe Lessing Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Bc4 d6 5. 0-0 Bg7 6. d4 Nc6 7. c3 h6 8. g3 g4 9. Bxf4 gxf3 10. Qxf3 Qe7 11. Nd2 Nf6 12. e5 dxe5 13. dxe5 Qc5+ 14. Kh1 Bg4 15. Bxf7+ Kxf7 16. Qxg4 Nxg4 17. Be3+ Ke6 18. Bxc5 Ngxe5 19. Rae1 Rad8 20. Nf3 Kd5 21. Nxe5 Bxe5 22. Be3 h5 23. Rf5 Ke6 24. Rg5 Rdg8 25. Kg2 h4 26. gxh4 Rxg5+ 27. Bxg5 Rf8 28. h5 Rg8 29. h4 Kf7 30. Kf3 Rh8 31. Kg4 Kg7 32. Kf5 Rf8+ 33. Ke6 Bd6 34. Kd5 Rf5+ 35. Kc4 Ne5+ 36. Kb3 Nf3 37. h6+ Kh7 38. Re8 Nxg5 39. hxg5 Rxg5 40. Ra8 a5 41. Ka4 b6 42. a3 Kxh6 43. b4 axb4 44. axb4 Kg6 45. Re8 Kf6 46. c4 Rg4 47. Kb5 Kf7 48. Re2 Rg5+ 49. Kc6 Bxb4 50. Kxc7 Bc5 51. Kc6 Kg6 52. Kb5 Rg4 53. Re6+ Kf5 54. Re8 Re4 55. Rh8 Re5 56. Rh1 Ke4 57. Rd1 Ke3 58. Re1+ Kd4 59. Rd1+ Kc3 60. Rc1+ Kb2 61. Rh1 Re3 62. Rh2+ Kc3 63. Rh1 Rd3 64. Rc1+ Kb2 65. Rh1 Rb3+ 66. Kc6 Rb4 67. Kd5 Kc3 68. Rc1+ Kd2 69. Rh1 Rb3 70. Rh2+ Kc3 71. Rh1 Kb4 72. Rc1 Ka4 73. Ra1+ Ra3 74. Rb1 Rb3 75. Ra1+ Kb4 76. Rc1 Rb2 77. Kc6 Kb3 78. Kd5 Rc2 79. Rb1+ Rb2 80. Rc1 Rc2 81. Rb1+ Kc3 82. Rb5 Rd2+ 83. Kc6 Rd4 84. Rxc5 bxc5 85. Kxc5 Rxc4+ 86. Kd5 Rd4+ 1-0

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.15"]
[Round "4.1"]
[White "Matthaei, Jakob"]
[Black "Hahn, Sebastian"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1620"]
[BlackElo "1505"]
[PlyCount "45"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Hohe Lessing Gymn"]
[BlackTeam "NDS W Raabe Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. c3 g6 3. d4 cxd4 4. cxd4 Bg7 5. Nc3 b6 6. Be3 Bb7 7. Qd2 Nf6 8. f3 0-0 9. Bd3 d6 10. Nge2 Nc6 11. h4 a6 12. Ng3 Nd7 13. Be2 b5 14. h5 e5 15. d5 Nd4 16. Bh6 Rc8 17. hxg6 fxg6 18. Bxg7 Kxg7 19. Qh6+ Kf7 20. Qxh7+ Ke8 21. Qxg6+ Ke7 22. Rh7+ Rf7 23. Qxf7# 1-0

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.15"]
[Round "6.1"]
[White "Matthaei, Jakob"]
[Black "Saphoerster, Arne"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1620"]
[BlackElo "1618"]
[PlyCount "115"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Hohe Lessing Gymn"]
[BlackTeam "Kardinal von Galen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 Nc6 6. cxd4 e6 7. Nc3 Be7 8. Bc4 Nxc3 9. bxc3 0-0 10. 0-0 a6 11. Qe2 b5 12. Bd3 Bb7 13. Qe4 g6 14. Qe2 Rc8 15. Bh6 Re8 16. Rac1 Na5 17. Nd2 Bg5 18. Bxg5 Qxg5 19. f4 Qd8 20. Be4 Bxe4 21. Nxe4 Nc4 22. Nf6+ Kg7 23. Nxe8+ Qxe8 24. g4 Qe7 25. f5 exf5 26. gxf5 Qg5+ 27. Kh1 gxf5 28. Rg1 Qxg1+ 29. Rxg1+ Kf8 30. Qg2 Ke7 31. Qg5+ Ke6 32. Qf6+ Kd5 33. Qxf7+ Ke4 34. Re1+ Kf4 35. Rf1+ Ke3 36. Qxf5 Nd2 37. Qf4+ Kd3 38. Rd1 Rxc3 39. Qxd2+ Kc4 40. Rc1 b4 41. Rxc3+ bxc3 42. Qc2 a5 43. Kg2 a4 44. Kf3 Kxd4 45. Qxh7 Kc4 46. Qe4+ Kb5 47. Qd4 c2 48. Qd3+ Kb4 49. Qxc2 Ka3 50. h4 Kb4 51. h5 Kb5 52. h6 d6 53. exd6 a3 54. d7 Kb4 55. d8Q Kb5 56. Qb8+ Ka5 57. Qc5+ Ka6 58. Qca7# 1-0

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.08"]
[Round "2.1"]
[White "Matthaei, Jakob"]
[Black "Weishaeutel, Moritz"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1620"]
[BlackElo "2049"]
[PlyCount "71"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Hohe Lessing Gymn"]
[BlackTeam "Erfurt Alb Schweitzer Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Nc6 6. Be3 cxd4 7. cxd4 e6 8. Nc3 Qd6 9. Bd3 Be7 10. 0-0 0-0 11. h3 b6 12. Rc1 Bb7 13. Qe2 Rfd8 14. Rfd1 Nd5 15. Bb1 g6 16. h4 Bf8 17. h5 Bg7 18. Ne4 Qd7 19. hxg6 hxg6 20. Bg5 Re8 21. a3 e5 22. dxe5 Nxe5 23. Nxe5 Rxe5 24. Qd2 Qc7 25. Rxc7 Bh6 26. Bxh6 Rae8 27. Rxb7 Rh5 28. Qxd5 Rxd5 29. Rxd5 Kh7 30. Nf6+ Kxh6 31. Nxe8 f5 32. f4 Kh5 33. g3 Kg4 34. Kg2 Kh5 35. Rh7+ Kg4 36. Rh4# 1-0

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.08"]
[Round "1.1"]
[White "Musiolik, David"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2079"]
[BlackElo "1620"]
[PlyCount "62"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Weierh Gymn"]
[BlackTeam "Hohe Lessing Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 0-0 9. d4 Bf6 10. Re1 Nf5 11. c3 d5 12. Bf4 Nd6 13. Nd2 c6 14. Qf3 Bg5 15. Bd3 Bxf4 16. Qxf4 g6 17. g4 f5 18. g5 Ne4 19. Nf3 Be6 20. h4 Qb6 21. Re2 Rae8 22. Ne5 Kg7 23. f3 Bc8 24. Qh2 Nd6 25. h5 Qd8 26. Rg2 Rh8 27. a4 Nf7 28. f4 Nxe5 29. fxe5 Be6 30. b4 Qe7 31. a5 Rc8 1/2-1/2

[Event "GER-chT School WK 2"]
[Site "Playchess.com INT"]
[Date "2020.06.08"]
[Round "3.1"]
[White "Sallandt, Frido"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1988"]
[BlackElo "1620"]
[PlyCount "97"]
[EventDate "2020.06.08"]
[EventType "team-swiss (blitz)"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]
[WhiteTeam "Leibniz Gymn"]
[BlackTeam "Hohe Lessing Gymn"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. 0-0 d5 7. exd5 Nxd5 8. h3 Nb6 9. Bb3 Bf5 10. Re1 Bxd3 11. Nxe5 Nxe5 12. Rxe5 Bd6 13. Re1 Re8 14. Be3 Bf5 15. Nd2 Qf6 16. Nf3 Be4 17. a4 Rad8 18. a5 Bh2+ 19. Kxh2 Rxd1 20. Raxd1 Bxf3 21. gxf3 Nc8 22. Rd4 Nd6 23. Rg1 Qxf3 24. Rf4 Qe2 25. Bd4 g6 26. c4 Re4 27. Rxe4 Qxe4 28. Bc3 Qf4+ 29. Kg2 Ne4 30. Be1 Ng5 31. Bd1 Qxc4 32. Bc3 Qd5+ 33. Kh2 Ne4 34. Bf3 Qd6+ 35. Kg2 Nxc3 36. bxc3 b6 37. axb6 axb6 38. Rd1 Qc5 39. c4 Qxc4 40. Rd8+ Kg7 41. Rd7 Qf4 42. Bd5 b5 43. h4 b4 44. Bf3 b3 45. Rd8 b2 46. Rb8 Qc1 47. Be4 Qc4 48. Bb1 f5 49. Rxb2 1-0

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.30"]
[Round "8"]
[White "Matthaei, Jakob"]
[Black "Mucha, Annegret"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1838"]
[BlackElo "2041"]
[PlyCount "38"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 Qa5 3. Na3 Nc6 4. Nf3 a6 5. Nc4 Qc7 6. a4 d6 7. d3 g6 8. Be2 Bg7 9. 0-0 Nf6 10. Bg5 0-0 11. Ne3 e6 12. Rc1 Bd7 13. Nd2 Qb8 14. f4 b5 15. g4 bxa4 16. Ndc4 Ne8 17. f5 f6 18. Bf4 e5 19. Bg3 Bh6 1/2-1/2

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.29"]
[Round "7"]
[White "Halas, Julia"]
[Black "Matthaei, Jakob"]
[Result "0-1"]
[ECO "D58"]
[WhiteElo "2087"]
[BlackElo "1838"]
[PlyCount "108"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 0-0 6. e3 b6 7. cxd5 exd5 8. Qc2 Bb7 9. Bd3 h6 10. Bh4 c5 11. 0-0 Nc6 12. a3 a6 13. Rac1 c4 14. Bf5 b5 15. Rcd1 Ne8 16. Bxe7 Nxe7 17. Bh3 Bc8 18. Bxc8 Rxc8 19. Ne5 Nf6 20. f3 Nd7 21. Nxd7 Qxd7 22. e4 Rfe8 23. Qf2 Rb8 24. e5 a5 25. f4 b4 26. axb4 axb4 27. Ne2 g6 28. Ng3 Nf5 29. Ne2 Ne7 30. Qf3 Ra8 31. Ra1 Ra4 32. g4 Kh7 33. Ng3 Rxa1 34. Rxa1 Rc8 35. f5 c3 36. fxg6+ Nxg6 37. bxc3 Rxc3 38. Qf6 Qe6 39. Qxe6 fxe6 40. Nh5 b3 41. Nf6+ Kg7 42. Ra7+ Kf8 43. Rb7 Nf4 44. Nd7+ Kg8 45. Nf6+ Kf8 46. Nd7+ Ke8 47. Kf1 Rc1+ 48. Kf2 b2 49. Nf6+ Kd8 50. Ke3 Ng2+ 51. Kf2 Ne1 52. Ng8 b1Q 53. Rxb1 Rxb1 54. Nxh6 Nc2 0-1

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.29"]
[Round "6"]
[White "Matthaei, Jakob"]
[Black "Schmidt, Kai Uwe"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1838"]
[BlackElo "1982"]
[PlyCount "99"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 e6 6. cxd4 d6 7. Bc4 Nc6 8. 0-0 Be7 9. Qe2 0-0 10. Nc3 Nxc3 11. bxc3 dxe5 12. Nxe5 Nxe5 13. Qxe5 Bd7 14. Bd2 Bf6 15. Qe2 Bc6 16. f4 Rc8 17. Rae1 Bd5 18. Bd3 g6 19. g4 Re8 20. g5 Bg7 21. h4 Bxa2 22. Ra1 Bd5 23. Rxa7 Bc6 24. Rfa1 Qd5 25. Kh2 Qd6 26. Bb5 Qd7 27. Bxc6 Qxc6 28. Qg2 Bf8 29. Rxb7 Qxg2+ 30. Kxg2 Ra8 31. Raa7 Rxa7 32. Rxa7 Rb8 33. Kf3 h6 34. c4 Bg7 35. Be3 Rb3 36. Ke4 f5+ 37. gxf6 Bxf6 38. Ra1 Bxh4 39. Rh1 Bf6 40. Rxh6 Kg7 41. Rh1 Rc3 42. c5 Kf7 43. Rb1 Be7 44. Rb7 Ke8 45. Bd2 Ra3 46. c6 Ra2 47. Bc3 Kd8 48. d5 Re2+ 49. Kd3 Ra2 50. d6 1-0

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.28"]
[Round "5"]
[White "Kurze, Christoph"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2016"]
[BlackElo "1838"]
[PlyCount "145"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 d5 3. c4 e6 4. Bg2 Be7 5. e3 0-0 6. b3 c5 7. 0-0 Nc6 8. d3 b6 9. Bb2 Bb7 10. Qe2 Qc7 11. Nc3 Rad8 12. Rfd1 Qb8 13. Nb5 Rd7 14. Na3 Re8 15. Nc2 dxc4 16. bxc4 Red8 17. Nce1 h6 18. a3 Ne8 19. Nd2 Bf6 20. Bxf6 Nxf6 21. f4 e5 22. Ne4 Nxe4 23. Bxe4 Ne7 24. Qf3 exf4 25. gxf4 Qa8 26. Bxb7 Qxb7 27. Kf2 Qxf3+ 28. Kxf3 Nf5 29. a4 Nd6 30. Rdb1 Nb7 31. Rb3 Na5 32. Rc3 Nc6 33. Ke2 Re7 34. Kf2 f6 35. Ng2 Red7 36. Rd1 g6 37. Ke2 Kf7 38. e4 Nd4+ 39. Kf2 Ne6 40. Rd2 Rd6 41. Kg3 g5 42. f5 Ng7 43. Kg4 Rd4 44. Kf3 R4d6 45. Ne3 Ne8 46. Nd5 R8d7 47. Ra2 Nc7 48. Nxc7 Rxc7 49. a5 Rb7 50. Rb3 Rd8 51. axb6 axb6 52. Ra6 Rdb8 53. Rb5 Ke7 54. Ke3 h5 55. e5 fxe5 56. Ke4 Rd7 57. Kxe5 Rxd3 58. Ra7+ Kf8 59. Rh7 Kg8 60. Rxh5 Kg7 61. Rxg5+ Kf7 62. Rg6 Re3+ 63. Kf4 Rc3 64. Rbxb6 Rxc4+ 65. Kg5 Rxb6 66. Rxb6 Rd4 67. Rb7+ Kf8 68. Rc7 Rd2 69. h4 Kg8 70. Kg6 Rg2+ 71. Kf6 Rh2 72. h5 Rxh5 73. Kg6 1-0

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.28"]
[Round "4"]
[White "Matthaei, Jakob"]
[Black "Maiwald, Harald"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1838"]
[BlackElo "2005"]
[PlyCount "78"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 g6 6. Be3 cxd4 7. cxd4 Bg7 8. Nc3 Qa5 9. Bd3 0-0 10. 0-0 Nc6 11. a3 Rd8 12. b4 Qh5 13. Be2 Ng4 14. h3 Nxe3 15. fxe3 Qh6 16. Qc1 Be6 17. Re1 Rac8 18. Bf1 Qh5 19. Be2 Qh6 20. Bf1 f5 21. Kh1 Bf7 22. Bb5 e5 23. Bxc6 Rxc6 24. Qb2 exd4 25. Nxd4 Rxd4 26. exd4 Bxd4 27. Rac1 Qg7 28. Rcd1 Qf6 29. Rxd4 Qxd4 30. Na4 Qxb2 31. Nxb2 Rc2 32. Nd3 Bd5 33. Nf4 Be4 34. Re2 Rxe2 35. Nxe2 Kf7 36. Kg1 Ke6 37. Kf2 Kd5 38. Ke3 Kc4 39. Nd4 Bxg2 0-1

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.27"]
[Round "3"]
[White "Farokhi, Keyvan"]
[Black "Matthaei, Jakob"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2023"]
[BlackElo "1838"]
[PlyCount "111"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 d5 3. e3 c5 4. c3 Nc6 5. Nd2 e6 6. Ngf3 cxd4 7. exd4 Nh5 8. Be3 Bd6 9. Ne5 g6 10. g4 Ng7 11. h4 h5 12. gxh5 Bxe5 13. dxe5 Rxh5 14. Bg5 Qb6 15. Be2 Rh7 16. Qc2 Nxe5 17. h5 Nf5 18. 0-0-0 gxh5 19. Bxh5 Bd7 20. Be2 Rxh1 21. Rxh1 Ng6 22. Bh5 Nfe7 23. Bxe7 Kxe7 24. Bxg6 fxg6 25. Rh7+ Kd6 26. Qxg6 Qd8 27. Qg3+ Kc6 28. Nf3 Kb6 29. Qd6+ Bc6 30. Qxe6 Qe8 31. Re7 Qh5 32. Qe3+ Ka6 33. Nd4 Qh1+ 34. Qe1 Qxe1+ 35. Rxe1 Rf8 36. Nxc6 bxc6 37. Rf1 Kb5 38. f4 Rf5 39. Kd2 a5 40. Ke3 Kc4 41. Kf3 a4 42. Kg4 Rf8 43. f5 c5 44. Kg5 a3 45. bxa3 Kxc3 46. f6 Kb2 47. Rf5 Rd8 48. f7 Kxa3 49. f8Q Rxf8 50. Rxf8 Kxa2 51. Kf4 Kb3 52. Ke3 Kc3 53. Rd8 d4+ 54. Ke4 d3 55. Rxd3+ Kc2 56. Rh3 1-0

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.27"]
[Round "2"]
[White "Matthaei, Jakob"]
[Black "Barthel, Ansgar"]
[Result "0-1"]
[ECO "B05"]
[WhiteElo "1838"]
[BlackElo "2052"]
[PlyCount "84"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6 6. 0-0 Bxf3 7. Bxf3 dxe5 8. dxe5 e6 9. Qe2 Qc7 10. c4 Ne7 11. Bg4 Nd7 12. f4 0-0-0 13. Be3 Nf5 14. Bxf5 exf5 15. Qc2 g6 16. Nc3 Bc5 17. Bxc5 Nxc5 18. Rad1 Qb6 19. Kh1 Ne6 20. g3 h5 21. Qf2 Rxd1 22. Nxd1 Rd8 23. Nc3 Qxf2 24. Rxf2 Rd4 25. b3 Rd3 26. Na4 h4 27. Kg2 hxg3 28. hxg3 Kc7 29. Rf3 Rd1 30. Nc3 Rc1 31. Rd3 Nc5 32. Re3 a5 33. Kf3 Ne6 34. Rd3 Rc2 35. Ne2 Rxa2 36. Rd1 Ra3 37. Rh1 Rxb3+ 38. Kf2 a4 39. Rh7 a3 40. Rh1 Nc5 41. Ra1 Ne4+ 42. Ke1 a2 0-1

[Event "Erfurt op-A 29th"]
[Site "Erfurt"]
[Date "2019.12.26"]
[Round "1"]
[White "Reitz, Philipp"]
[Black "Matthaei, Jakob"]
[Result "1/2-1/2"]
[ECO "E08"]
[WhiteElo "2068"]
[BlackElo "1838"]
[PlyCount "120"]
[EventDate "2019.12.26"]
[EventType "swiss"]
[EventRounds "8"]
[EventCountry "GER"]
[SourceTitle "CBM 194 Extra"]
[Source "ChessBase"]
[SourceDate "2020.03.31"]
[SourceVersion "1"]
[SourceVersionDate "2020.03.31"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 0-0 6. 0-0 a6 7. cxd5 exd5 8. Nc3 Nbd7 9. Bf4 c6 10. Qc2 Nb6 11. b3 Nh5 12. Be3 f5 13. Ne5 Bd6 14. f4 Nf6 15. a4 Ne4 16. Nxe4 dxe4 17. a5 Nd5 18. Bc1 Be6 19. Nc4 Bc7 20. e3 Kh8 21. g4 g6 22. g5 h6 23. h4 hxg5 24. hxg5 Kg7 25. Bd2 Rh8 26. Kf2 Qe7 27. Rh1 Bd6 28. Rag1 Kf7 29. Qd1 Nc7 30. d5 cxd5 31. Qa1 dxc4 32. Rxh8 Rxh8 33. Qxh8 Qf8 34. Qf6+ Ke8 35. Qxg6+ Kd7 36. bxc4 Qh8 37. Rh1 Qb2 38. Rh7+ Kc6 39. Bxe4+ Kc5 40. Ke2 Bxc4+ 41. Bd3 Bxd3+ 42. Kxd3 Qb5+ 43. Kc2 Qc4+ 44. Bc3 Qe2+ 45. Kb3 Qd1+ 46. Kb2 Qe2+ 47. Ka1 Qd1+ 48. Ka2 Qe2+ 49. Bb2 Qc4+ 50. Kb1 Qd3+ 51. Ka1 Qd1+ 52. Ka2 Qd5+ 53. Kb1 Qd1+ 54. Bc1 Qb3+ 55. Ka1 Qc3+ 56. Ka2 Qc2+ 57. Bb2 Qc4+ 58. Kb1 Qd3+ 59. Ka2 Qc4+ 60. Kb1 Qd3+ 1/2-1/2

