[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.11"]
[Round "9"]
[White "Detjen, Mattes"]
[Black "Miller, Elias"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1098"]
[BlackElo "1548"]
[PlyCount "97"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Bd7 6. Be2 Nge7 7. 0-0 Nf5 8. a3 c4 9. Bg5 f6 10. exf6 gxf6 11. Bf4 Qb6 12. Qc2 0-0-0 13. Nbd2 Na5 14. Rfb1 Nb3 15. Nxb3 Ba4 16. Qd2 Bxb3 17. Bd1 Bd6 18. Bxd6 Rxd6 19. Bxb3 Qxb3 20. a4 Qb6 21. Qc2 Qa5 22. b4 Qc7 23. a5 Qg7 24. Re1 Rg8 25. g3 Qg4 26. Qe2 h5 27. Kh1 Qg6 28. Rg1 Qf7 29. Rae1 Rg4 30. h3 Rg8 31. Qd2 Rd7 32. Qe2 Re7 33. Kg2 Rg7 34. Kf1 Nd6 35. Qe3 Ne4 36. Nd2 Nd6 37. Qf4 Nb5 38. Qe3 Qg6 39. Nf3 Qf5 40. h4 Kd7 41. Rc1 Rg4 42. Nh2 Rg8 43. Qf3 Qg6 44. Qe3 Qe8 45. Qf3 Qf7 46. Kg2 Nd6 47. Rce1 Qg6 48. Re3 Nf5 49. Ng4 0-1

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.10"]
[Round "8"]
[White "Goldinov, Daniel"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "1626"]
[BlackElo "1098"]
[PlyCount "81"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. Nf3 Nxe4 5. Nxe4 d5 6. Bb5 dxe4 7. Nxe5 Bd7 8. Bxc6 Bxc6 9. Qe2 Qe7 10. Nxc6 bxc6 11. Qc4 c5 12. Qb5+ Qd7 13. Qb7 Rd8 14. Qxe4+ Qe7 15. Qxe7+ Bxe7 16. d3 Bd6 17. 0-0 Kd7 18. Bd2 Rhe8 19. Rfe1 Rxe1+ 20. Rxe1 Re8 21. Rxe8 Kxe8 22. g3 f5 23. Bc3 g5 24. Bf6 g4 25. Kg2 Kf7 26. Bc3 h5 27. f4 Ke6 28. Kf2 Kd5 29. b3 a6 30. Ke3 c6 31. Bg7 Bc7 32. c4+ Kd6 33. Bf8+ Ke6 34. Bxc5 a5 35. a3 Bd8 36. d4 Bc7 37. Kd3 Bd8 38. b4 axb4 39. Bxb4 Bb6 40. a4 Ba7 41. Bc5 1-0

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.09"]
[Round "7"]
[White "Detjen, Mattes"]
[Black "Vihan, Shourya"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1098"]
[BlackElo "1385"]
[PlyCount "48"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. 0-0 Nc6 8. Bf4 Be7 9. c4 Qe4 10. Be3 cxd4 11. Bd3 Bxf3 12. gxf3 Qe5 13. Bd2 Qc7 14. Re1 Bd6 15. h3 0-0 16. Kh1 Ne5 17. Qe2 Qc6 18. Kg2 Nfd7 19. b3 Nc5 20. Be4 Nxe4 21. fxe4 Ng6 22. Bg5 Bf4 23. h4 Bxg5 24. hxg5 Nf4+ 0-1

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.08"]
[Round "5"]
[White "Goepfert, Gregor"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1446"]
[BlackElo "1098"]
[PlyCount "79"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Be3 0-0 10. 0-0 f6 11. Bxc6 bxc6 12. Nbd2 Bg4 13. Qb3 Nxd2 14. Nxd2 Re8 15. f4 Rb8 16. Qc3 Bd7 17. Nb3 Qe7 18. Rae1 Rf8 19. Qd3 Bg4 20. Kh1 Rbe8 21. Bd2 c5 22. dxc5 Bxc5 23. Qxd5+ Kh8 24. Qxc5 Qxc5 25. Nxc5 fxe5 26. fxe5 Rxf1+ 27. Rxf1 Kg8 28. Bc3 Be2 29. Re1 Bc4 30. b3 Bd5 31. e6 Kf8 32. Nd7+ Ke7 33. Bb4+ Kd8 34. Nf8 h6 35. e7+ Kc8 36. Ng6 Kd7 37. Nf4 Bf7 38. Rd1+ Kc8 39. Ne2 Kb7 40. Rd8 1-0

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.08"]
[Round "6"]
[White "Grundmann, Max"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1358"]
[BlackElo "1098"]
[PlyCount "97"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 c6 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 Be7 7. e3 Bf5 8. Bd3 Bxd3 9. Qxd3 Nbd7 10. 0-0 0-0 11. Nh4 h6 12. Bxf6 Nxf6 13. Nf5 Nh7 14. Rfe1 Bf6 15. Rad1 Re8 16. f3 Qd7 17. e4 dxe4 18. fxe4 Rad8 19. e5 Bxe5 20. Qh3 Bf6 21. Rxe8+ Qxe8 22. Kf1 Ng5 23. Qg4 Qd7 24. Qf4 Ne6 25. Qg3 Kf8 26. Ne2 Qc7 27. Qa3+ Kg8 28. g3 a6 29. Qb3 h5 30. Qa4 g6 31. Ne3 Qb6 32. Nc4 Qb5 33. Qxb5 axb5 34. Ne3 Nxd4 35. Nxd4 Rxd4 36. b3 Rxd1+ 37. Nxd1 Kf8 38. Ke2 Ke7 39. Ke3 c5 40. Ke4 Bd4 41. Kd5 Kd7 42. b4 b6 43. h3 g5 44. g4 h4 45. Ke4 Ke6 46. Ne3 Bxe3 47. Kxe3 f5 48. Kf3 c4 49. gxf5+ 0-1

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.07"]
[Round "4"]
[White "Detjen, Mattes"]
[Black "Uhlmann, Tim"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1098"]
[BlackElo "1808"]
[PlyCount "60"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Bc5 6. Be3 Bb6 7. Nf5 Bxe3 8. Nxe3 Nf6 9. Bd3 0-0 10. c4 d6 11. Nc3 Ne5 12. Bc2 Nfg4 13. Nxg4 Bxg4 14. f3 Be6 15. b3 Qh4+ 16. Ke2 Qg5 17. Kf2 f5 18. Rf1 Rf6 19. Kg1 Qe3+ 20. Kh1 Qxc3 21. f4 Ng4 22. exf5 Ne3 23. Qf3 Qxc2 24. Qxe3 Qxf5 25. Rae1 Bd7 26. Qf3 Bc6 27. Qf2 Rg6 28. Rg1 Rf8 29. Ref1 Rh6 30. Qg3 Rff6 0-1

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.05"]
[Round "1"]
[White "Detjen, Mattes"]
[Black "Braeutigam, Alexander"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "1098"]
[BlackElo "1749"]
[PlyCount "66"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 g6 5. Nf3 Bg7 6. Be2 cxd4 7. cxd4 Nf6 8. Nc3 Qa5 9. 0-0 0-0 10. Qb3 a6 11. Bc4 e6 12. Be3 b5 13. Be2 Bb7 14. a3 Nd5 15. Nxd5 Bxd5 16. Qc2 Nc6 17. b4 Qb6 18. Qd2 Rfd8 19. Rfd1 Bb3 20. Rdb1 Nxd4 21. Nxd4 Bxd4 22. Bxd4 Rxd4 23. Qe3 Bc4 24. Bxc4 bxc4 25. Rc1 Rad8 26. h3 Qd6 27. Qc3 Qe5 28. Qc2 c3 29. Re1 Qc7 30. Rac1 Rd3 31. Re3 Rxe3 32. fxe3 Rd2 33. Qxc3 Rd1+ 0-1

[Event "GER-ch U14"]
[Site "Willingen"]
[Date "2022.06.05"]
[Round "2"]
[White "Schwan, Aaron"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1671"]
[BlackElo "1098"]
[PlyCount "67"]
[EventDate "2022.06.04"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "CBM 208 Extra"]
[Source "ChessBase"]
[SourceDate "2022.07.31"]
[SourceVersion "1"]
[SourceVersionDate "2022.07.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. Bb3 d6 7. Nbd2 Bg4 8. h3 Be6 9. Nf1 Qd7 10. Ng3 d5 11. Qe2 dxe4 12. dxe4 Na5 13. Bxe6 Qxe6 14. b4 Bxf2+ 15. Qxf2 Nc6 16. 0-0 Qc4 17. Qe3 Rad8 18. Bd2 Rd3 19. Qe2 b5 20. a4 a6 21. axb5 axb5 22. Ra6 Rfd8 23. Kh1 Nb8 24. Nxe5 Rxd2 25. Qxd2 Rxd2 26. Nxc4 bxc4 27. Ra8 Rd8 28. Ra7 Rc8 29. Rd1 h6 30. e5 Ne8 31. Ra8 Kf8 32. Ne4 Ke7 33. Nc5 f6 34. Na6 1-0

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.28"]
[Round "6.4"]
[White "Dorendorf, Mika"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1550"]
[BlackElo "1124"]
[PlyCount "51"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Hamburger SK"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. 0-0 Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qd8 9. Rxe4+ Be6 10. Nxd4 Nxd4 11. Rxd4 Bd6 12. Nb5 Ke7 13. Bf4 Kf8 14. Nxc7 Rc8 15. Nxe6+ fxe6 16. Rxd6 Qf6 17. Qd4 Qf7 18. Rd7 Qf6 19. Be5 Qg6 20. Qd6+ Kg8 21. Rxg7+ Qxg7 22. Bxg7 Kxg7 23. Qe7+ Kg6 24. Qxe6+ Kg7 25. Rd1 Rcd8 26. Qe7+ 1-0

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.27"]
[Round "4.4"]
[White "Detjen, Mattes"]
[Black "Meusel, Theodor"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1124"]
[PlyCount "56"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Oberschoeneweide"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Be2 Bd7 7. 0-0 Nh6 8. Na3 Nf5 9. Nc2 Be7 10. a3 c4 11. Nb4 Na5 12. Nd2 Bg5 13. f4 Ne3 14. Qe1 Nxf1 15. Qxf1 Be7 16. Bg4 Nc6 17. b3 Nxb4 18. axb4 Bxb4 19. cxb4 Qxd4+ 20. Kh1 Qxa1 21. bxc4 Rc8 22. Nb3 Qc3 23. Bd1 Qxc4 24. Qe1 Ba4 25. Nc5 Bxd1 26. Qxd1 b6 27. Nd3 Qc2 28. Qf1 Rc3 0-1

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.27"]
[Round "5.4"]
[White "Pimenov, Danil"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1227"]
[BlackElo "1124"]
[PlyCount "82"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Lichtenberg Borussia"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Nf6 5. e5 Ne4 6. 0-0 d5 7. Bb5 Bd7 8. Bxc6 Bxc6 9. Nxd4 Qd7 10. f3 Nc5 11. Be3 Ne6 12. Nd2 Bc5 13. N2b3 Bb6 14. f4 0-0 15. f5 Nxd4 16. Bxd4 Bxd4+ 17. Nxd4 Rae8 18. Qe1 Re7 19. Qg3 f6 20. e6 Qe8 21. Rf4 b6 22. b4 Bb7 23. b5 c5 24. bxc6 Bxc6 25. Rf3 Bb7 26. a4 Qh5 27. Qd6 Rfe8 28. Raa3 Qh4 29. Qb4 Rc7 30. Qd2 Ba6 31. Rf4 Qg5 32. Rg3 Qh6 33. c3 Rc4 34. Rh3 Qg5 35. g4 g6 36. Kf2 Rxa4 37. Kg3 Bc4 38. Nf3 Ra2 39. Qd4 Bf1 40. Nxg5 Bxh3 41. Nxh3 g5 1-0

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.26"]
[Round "2.4"]
[White "Detjen, Mattes"]
[Black "Schaefle, Moritz"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "1124"]
[PlyCount "117"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Muenchen SF"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nf3 Bg4 6. Nc3 Nc6 7. Be3 e6 8. Be2 dxc4 9. Bxc4 Be7 10. 0-0 0-0 11. Bb3 Nb4 12. a3 Nbd5 13. Nxd5 Nxd5 14. Qe2 Qd7 15. h3 Bh5 16. Rfd1 Bf6 17. Rd2 Rfd8 18. Rad1 a6 19. Bc2 Bxf3 20. Qxf3 g6 21. Bh6 Qd6 22. Be4 Bg7 23. Bxg7 Kxg7 24. h4 Rd7 25. h5 Rad8 26. Qh3 Nf6 27. h6+ Kg8 28. Qe3 Ng4 29. Qh3 Qf4 30. Bf3 Nxh6 31. d5 Nf5 32. Qh2 Qxh2+ 33. Kxh2 Ne7 34. d6 Nf5 35. g4 Ng7 36. Kg3 Ne8 37. Kf4 f6 38. g5 Kf7 39. gxf6 Kxf6 40. b4 Rxd6 41. Rxd6 Rxd6 42. Rh1 h5 43. Bxb7 g5+ 44. Ke4 h4 45. f3 Nc7 46. Rc1 Rd7 47. Rg1 h3 48. f4 gxf4 49. Kxf4 h2 50. Rh1 Rh7 51. Kg3 Ke5 52. Rxh2 Rxh2 53. Kxh2 Kd4 54. Kg3 Ke3 55. Kg4 e5 56. Kf5 Kd4 57. a4 Kc4 58. Kxe5 Kxb4 59. Bxa6 1/2-1/2

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.26"]
[Round "3.4"]
[White "Etzold, Emil"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C51"]
[BlackElo "1124"]
[PlyCount "47"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Leipzig Weissblau"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. b4 Bxb4 6. c3 Be7 7. d4 d6 8. dxe5 dxe5 9. Bb5 Qxd1 10. Rxd1 Nxe4 11. Nxe5 0-0 12. Nxc6 bxc6 13. Bxc6 Nxc3 14. Nxc3 Rb8 15. a4 Bf6 16. Ra3 Rb6 17. Be4 Re8 18. Nd5 Rd6 19. Re3 Bg5 20. Bxh7+ Kf8 21. Rxe8+ Kxe8 22. Bxg5 g6 23. Re1+ Kf8 24. Bh6# 1-0

[Event "GER-chT U12"]
[Site "Naumburg Saale"]
[Date "2022.03.25"]
[Round "1.4"]
[White "Schimann, Kirill"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1344"]
[BlackElo "1124"]
[PlyCount "117"]
[EventDate "2022.03.25"]
[EventType "team-swiss"]
[EventRounds "6"]
[EventCountry "GER"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]
[WhiteTeam "Stuttgart Wolfbusch"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Bf4 e6 3. e3 Nf6 4. Nf3 Be7 5. c3 0-0 6. Bd3 b6 7. Nbd2 c5 8. dxc5 bxc5 9. Bc2 Ba6 10. e4 Nc6 11. exd5 exd5 12. Ba4 Qb6 13. Qb3 Qxb3 14. Nxb3 Rac8 15. Ne5 Nxe5 16. Bxe5 c4 17. Nd2 Bb7 18. Bd4 a6 19. 0-0 Bc6 20. Bxc6 Rxc6 21. Rfe1 Re8 22. Bxf6 Rxf6 23. Re5 Rd6 24. Rae1 Kf8 25. Nf3 Rd7 26. Rd1 Red8 27. Nd4 Bf6 28. Re2 Rd6 29. h3 Rb6 30. Rdd2 Rbd6 31. Kf1 Bg5 32. Rc2 Re8 33. Rxe8+ Kxe8 34. Nf5 Rg6 35. h4 Bf4 36. g3 Bc7 37. Rd2 Kf8 38. Rxd5 Rb6 39. Rd2 Rf6 40. g4 g6 41. Ne3 Bf4 42. Ke2 Re6 43. Rd4 Bxe3 44. fxe3 Rb6 45. Rd2 Ke7 46. e4 h5 47. gxh5 gxh5 48. Ke3 Rb5 49. Kd4 f5 50. Kxc4 fxe4 51. Re2 Kd6 52. Kd4 Ra5 53. a3 Rb5 54. c4 Rb7 55. b4 Ke6 56. Rxe4+ Kf5 57. c5 Rd7+ 58. Ke3 Rc7 59. Rc4 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.29"]
[Round "9"]
[White "Theviot, Luca"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "1417"]
[BlackElo "1162"]
[PlyCount "47"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. 0-0 0-0 6. b3 c5 7. e3 b6 8. Qe2 Bb7 9. d3 Nc6 10. Re1 Qc7 11. Bb2 Rad8 12. e4 d4 13. Nbd2 e5 14. Rf1 Rfe8 15. Ne1 a5 16. f4 Bd6 17. f5 Nb4 18. a3 Nc6 19. g4 g5 20. fxg6 Re6 21. gxf7+ Kf8 22. g5 Nd7 23. Qh5 Ke7 24. Qxh7 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.28"]
[Round "8"]
[White "Detjen, Mattes"]
[Black "Muendoerfer, Sebastian"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "1162"]
[BlackElo "1176"]
[PlyCount "97"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. c3 Bg7 4. d4 cxd4 5. cxd4 d5 6. e5 Nc6 7. Nc3 Bf5 8. Bb5 f6 9. 0-0 a6 10. Bxc6+ bxc6 11. Be3 fxe5 12. dxe5 e6 13. Na4 Ne7 14. Nc5 0-0 15. Nb7 Qc7 16. Nd6 Bxe5 17. Nxe5 Qxd6 18. Qd4 Be4 19. Bh6 Nf5 20. Bxf8 Rxf8 21. Qc3 d4 22. Qa5 c5 23. Nc4 Qd5 24. f3 Bd3 25. Nb6 Qc6 26. Rfe1 Rb8 27. Na4 Bb5 28. b3 Ne3 29. Rac1 c4 30. Nb2 c3 31. Nd1 Nxd1 32. Rexd1 Rc8 33. Rxd4 Qc5 34. Qb4 Qa7 35. Qd6 Re8 36. Kh1 e5 37. Re4 Qf2 38. Qd1 Qb2 39. Rc2 Qa3 40. Rxc3 Qxa2 41. Rce3 Qb2 42. Re1 Bc6 43. R1e2 Qa3 44. Rxe5 Rc8 45. Re1 Rb8 46. Re7 Qb2 47. Qd6 Qxb3 48. Qf6 Qxf3 49. Qg7# 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.27"]
[Round "7"]
[White "Detjen, Mattes"]
[Black "Ehses, Julius"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "1162"]
[BlackElo "1102"]
[PlyCount "77"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nf6 6. d4 Be7 7. Bd3 0-0 8. 0-0 d5 9. h3 Be6 10. Re1 Re8 11. Ng5 Bc8 12. Bf4 c6 13. Be5 Nbd7 14. f4 h6 15. Nf3 Nf8 16. Re3 Be6 17. Nh2 Bd6 18. Bxf6 Qxf6 19. f5 Bxf5 20. Rf3 Bxh2+ 21. Kxh2 Qd6+ 22. Kg1 Bxd3 23. Qxd3 Ne6 24. Raf1 f6 25. Qg6 Kh8 26. Rg3 Ng5 27. Rg4 Rg8 28. Rxg5 Qe7 29. Rh5 Raf8 30. Nd1 Re8 31. Nf2 Rgf8 32. Nh1 Qe3+ 33. Kh2 Qxd4 34. Ng3 Qxb2 35. Nf5 Qe5+ 36. Kh1 Qc7 37. Nxh6 Re7 38. Nf7+ Kg8 39. Rh8# 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.26"]
[Round "6"]
[White "Birkenheier, Nicolas"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1293"]
[BlackElo "1162"]
[PlyCount "91"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. c3 d6 6. 0-0 0-0 7. a4 a6 8. Nbd2 Ba7 9. Re1 Re8 10. Nf1 Be6 11. Bb3 d5 12. exd5 Bxd5 13. Bc2 Qd7 14. Ng3 h6 15. Ne4 Nxe4 16. dxe4 Be6 17. Be3 Qc8 18. Qe2 f5 19. exf5 Bxf5 20. Qc4+ Be6 21. Qh4 Qd8 22. Qxd8 Raxd8 23. Bxa7 Nxa7 24. Rxe5 Bd5 25. Rxd5 Rxd5 26. Bb3 c6 27. Bxd5+ cxd5 28. Kf1 Nc6 29. Rd1 Rd8 30. Nd4 Kf7 31. Nxc6 bxc6 32. Ke2 a5 33. b4 axb4 34. cxb4 Rb8 35. Rb1 Ra8 36. a5 Ke6 37. Ke3 Ke5 38. f4+ Ke6 39. Kd4 Kd6 40. Ra1 Rb8 41. Ra4 Rb5 42. a6 Rb8 43. a7 Ra8 44. g4 Kc7 45. h4 Kb6 46. g5 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.26"]
[Round "5"]
[White "Detjen, Mattes"]
[Black "Rueckel, Felix"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1162"]
[BlackElo "994"]
[PlyCount "47"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. g3 Ng6 8. Bg2 Nxd4 9. cxd4 Bb4+ 10. Nc3 c6 11. f4 Qd8 12. 0-0 0-0 13. e5 d5 14. f5 Ne7 15. f6 gxf6 16. exf6 Ng6 17. Qd2 Kh8 18. Bg5 Bd6 19. Rae1 Be6 20. Bh6 Re8 21. Bg7+ Kg8 22. Qh6 Rf8 23. Bh8 Kxh8 24. Qg7# 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.25"]
[Round "4"]
[White "Fruth, David"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C70"]
[WhiteElo "1749"]
[BlackElo "1162"]
[PlyCount "51"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. Ng5 d5 7. exd5 Na5 8. 0-0 Nxb3 9. axb3 Nxd5 10. Qf3 f6 11. Ne4 Rb8 12. c4 bxc4 13. bxc4 Nb4 14. Nbc3 Bb7 15. b3 Nc2 16. Rb1 Nd4 17. Qh5+ g6 18. Qh4 Bg7 19. Nc5 Ba8 20. Nxa6 Rxb3 21. Rxb3 Nxb3 22. Nb5 c6 23. Nac7+ Kf7 24. Qh3 cxb5 25. Qe6+ Kf8 26. Ba3+ 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.24"]
[Round "3"]
[White "Detjen, Mattes"]
[Black "Jumah, Shayan"]
[Result "1/2-1/2"]
[ECO "C02"]
[WhiteElo "1162"]
[BlackElo "1275"]
[PlyCount "76"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[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 cxd4 9. cxd4 Be7 10. Nc3 f6 11. 0-0 fxe5 12. dxe5 Bd8 13. Na4 Qa7 14. Be3 b6 15. Qd2 Nge7 16. b4 Qb8 17. bxa5 Nxa5 18. Rab1 Nc4 19. Qd1 Nxa3 20. Ra1 Nxc2 21. Qxc2 Bxa4 22. Rxa4 Rxa4 23. Qxa4+ b5 24. Rb1 bxa4 25. Rxb8 Nc6 26. Ra8 0-0 27. Rxa4 Bc7 28. Bf4 d4 29. Rc4 Rxf4 30. Rxc6 Ba5 31. Rxe6 d3 32. Rd6 Ra4 33. g3 Ra3 34. e6 Kf8 35. Rd7 Ra1+ 36. Kg2 Rd1 37. Rd5 Bc3 38. Rd7 d2 1/2-1/2

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.23"]
[Round "1"]
[White "Detjen, Mattes"]
[Black "Schuricht, Emil Frederick"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "1162"]
[BlackElo "1422"]
[PlyCount "50"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Nf6 6. Bf4 Bg4 7. Qb3 Qd7 8. Nd2 e6 9. Ngf3 Be7 10. Ne5 Qc8 11. Nxg4 Nxg4 12. 0-0 0-0 13. Qc2 f5 14. Nf3 Qd7 15. h4 Rac8 16. h5 Qe8 17. h6 Nxh6 18. Bxh6 gxh6 19. Rfe1 Bd6 20. Qd2 Rf6 21. Re2 Rc7 22. Rae1 Rg7 23. Nh4 Qh5 24. Nf3 Qxf3 25. g3 Rfg6 0-1

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2021.08.23"]
[Round "2"]
[White "Uyar, Levin"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "1048"]
[BlackElo "1162"]
[PlyCount "55"]
[EventDate "2021.08.22"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d4 exd4 6. 0-0 Bc5 7. e5 Nd5 8. c3 Nb6 9. cxd4 Nxa4 10. Qxa4 b5 11. Qd1 Bb6 12. d5 Ne7 13. d6 cxd6 14. exd6 Nc6 15. Re1+ Kf8 16. Bg5 f6 17. Bf4 Bb7 18. Nc3 Kf7 19. Qd5+ Kf8 20. Qd2 Kf7 21. Qd5+ Kf8 22. Ne4 Na5 23. Qd3 Kf7 24. Neg5+ Kf8 25. Re7 Bxf3 26. Nxh7+ Kg8 27. Nxf6+ Kf8 28. Qg6 1-0

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.08"]
[Round "7.9"]
[White "Detjen, Mattes"]
[Black "Schreiber, Benedikt"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1162"]
[BlackElo "1248"]
[PlyCount "74"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Fritzdorf"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 g6 5. Nf3 Bg7 6. Bc4 d6 7. 0-0 Nf6 8. Nc3 Bg4 9. Be2 0-0 10. a3 a6 11. d5 Bxf3 12. Bxf3 Ne5 13. Be2 Rc8 14. f4 Qb6+ 15. Kh1 Nc4 16. Rf3 Ng4 17. Qf1 Nxb2 18. Rb1 Rxc3 19. Rxc3 Bxc3 20. Bxg4 Qd4 21. Qe2 Nd3 22. Be3 Qxe4 23. Bf3 Nf2+ 24. Bxf2 Qxb1+ 25. Qd1 Qxd1+ 26. Bxd1 Rc8 27. g3 Bb2 28. Be3 Bxa3 29. Kg2 Bc1 30. Bd4 Rc4 31. Bf2 b5 32. Be1 Bxf4 33. gxf4 Rc1 34. Bb3 Rxe1 35. Kf2 Re4 36. Kf3 Rb4 37. Bc2 Rb2 0-1

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.07"]
[Round "5.9"]
[White "Detjen, Mattes"]
[Black "Puchas, Henrik"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1162"]
[BlackElo "1539"]
[PlyCount "46"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Vimbuch"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Bb6 6. g3 Nf6 7. Bg2 Qe7 8. Nc3 d6 9. Nxc6 bxc6 10. e5 Nd7 11. Bxc6 Rb8 12. exd6 cxd6 13. Nd5 Qe5 14. Nxb6 Rxb6 15. Bxd7+ Bxd7 16. Qd4 Rxb2 17. Qxe5+ dxe5 18. c3 0-0 19. 0-0-0 Rxa2 20. Kb1 Be6 21. Rd2 Rb8+ 22. Kc1 Ra1+ 23. Kc2 Bf5+ 0-1

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.07"]
[Round "6.8"]
[White "Herrmann, Jakob"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1531"]
[BlackElo "1162"]
[PlyCount "69"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Torgelow Droegeheide"]
[BlackTeam "Werder Bremen"]
[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 Nb6 9. b3 d5 10. exd6 cxd6 11. Bb2 d5 12. Qxe7+ Bxe7 13. cxd5 cxd5 14. Bxg7 Rg8 15. Bd4 Bg4 16. Bb5+ Bd7 17. Bxd7+ Kxd7 18. 0-0 Rac8 19. Nc3 Bd6 20. Bxb6 axb6 21. Nxd5 Rc6 22. Nf6+ Ke6 23. Nxg8 Bf4 24. Rfe1+ Be5 25. f4 Rc8 26. Rxe5+ Kd7 27. Rd1+ Kc7 28. Rc1+ Kb8 29. Rxc8+ Kxc8 30. Nf6 h5 31. Nxh5 f6 32. Nxf6 b5 33. Re7 b4 34. f5 Kd8 35. Ng8 1-0

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.06"]
[Round "4.9"]
[White "Detjen, Mattes"]
[Black "Werner, Florin"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "1162"]
[BlackElo "1533"]
[PlyCount "100"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Offenbach"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Nf6 6. Qe2+ Qe7 7. Qxe7+ Bxe7 8. Bf4 c6 9. 0-0 0-0 10. Nbd2 Be6 11. Ng5 Bg4 12. Ngf3 Nbd7 13. Bg5 Bd6 14. Rfe1 Rfe8 15. c4 dxc4 16. Bxc4 h6 17. Bh4 Nb6 18. Bb3 Nbd5 19. h3 Bf5 20. Nc4 Bb4 21. Rxe8+ Rxe8 22. Rd1 Ne4 23. Nce5 f6 24. Nd3 Bd6 25. Bxd5+ cxd5 26. Nc1 g5 27. Bg3 Nxg3 28. fxg3 Bxg3 29. Nb3 b6 30. Nbd2 Re2 31. Nf1 Bf2+ 32. Kh1 Rxb2 33. Ra1 Be4 34. N1d2 Bxd4 35. Nxe4 dxe4 36. Nxd4 e3 37. Kg1 Kg7 38. Nf5+ Kg6 39. Nxe3 f5 40. g4 f4 41. Nd1 Rc2 42. a3 h5 43. Nf2 h4 44. Kg2 Kf6 45. Rd1 Ra2 46. Rd3 Ke5 47. Kf3 Ra1 48. Ne4 Rf1+ 49. Nf2 Re1 50. Nd1 Rh1 1/2-1/2

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.06"]
[Round "3.9"]
[White "Sinka, Silas"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "D30"]
[WhiteElo "1344"]
[BlackElo "1162"]
[PlyCount "57"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Nauen Hellas"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. e3 Be7 5. b3 0-0 6. Bd3 b6 7. Nbd2 Bb7 8. Bb2 c5 9. Qc2 Nc6 10. a3 Rc8 11. 0-0 dxc4 12. bxc4 cxd4 13. exd4 b5 14. c5 b4 15. Qc4 bxa3 16. Rxa3 Qc7 17. Rb1 Rfd8 18. Bc3 Ba8 19. Rba1 Rd5 20. Ne4 Rcd8 21. Nxf6+ Bxf6 22. Be4 Rh5 23. h3 e5 24. d5 Ne7 25. Ba5 Qd7 26. Bxd8 Qxd8 27. Rxa7 Bxd5 28. Bxd5 Nc8 29. Bxf7+ 1-0

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.05"]
[Round "1.9"]
[White "Detjen, Mattes"]
[Black "Apel, Linus"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1162"]
[BlackElo "1475"]
[PlyCount "82"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Werder Bremen"]
[BlackTeam "Erfurt USV"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. g3 d5 8. Bg2 Nxd4 9. cxd4 Bb4+ 10. Nc3 dxe4 11. Bxe4 c6 12. Bg2 0-0 13. 0-0 Bf5 14. Qb3 Ba5 15. Qxb7 Bd3 16. Rfd1 Rfb8 17. Qd7 Bf5 18. Ne4 Bxd7 19. Nxf6+ gxf6 20. d5 Rxb2 21. Rac1 Rc8 22. dxc6 Bxc6 23. Bd4 Rd2 24. Bxf6 Rxd1+ 25. Rxd1 Bxg2 26. Kxg2 Ng6 27. Rd7 Bb6 28. Rd2 Rc6 29. Bb2 Re6 30. Rc2 Rd6 31. Re2 Bd4 32. Rd2 Be5 33. Rxd6 Bxd6 34. f4 f5 35. Kf3 Bc5 36. h3 h5 37. Bf6 Kf7 38. Bd8 Ke6 39. a4 Kd5 40. a5 Kc6 41. Ke2 Kb5 0-1

[Event "GER-chT U12"]
[Site "Magdeburg"]
[Date "2021.08.05"]
[Round "2.9"]
[White "Dubinker, Philipp"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C56"]
[WhiteElo "1382"]
[BlackElo "1162"]
[PlyCount "41"]
[EventDate "2021.08.04"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Marburg"]
[BlackTeam "Werder Bremen"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 Qe7 6. 0-0 Ng8 7. Bf4 Qd8 8. Nxd4 d6 9. e6 fxe6 10. Nxe6 Bxe6 11. Bxe6 Nf6 12. Re1 Be7 13. Nc3 h6 14. Qd3 Kf8 15. Nb5 Ne5 16. Bxe5 dxe5 17. Qxd8+ Rxd8 18. Nxc7 a6 19. Rad1 Rxd1 20. Rxd1 Bc5 21. Rd8+ 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.31"]
[Round "7"]
[White "Chugunov, Ivan"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1552"]
[BlackElo "1190"]
[PlyCount "77"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 0-0 6. Bb3 d5 7. Nbd2 Bg4 8. Qe2 d4 9. a4 a6 10. h3 Bh5 11. 0-0 Qd7 12. Rd1 b5 13. Nf1 dxc3 14. bxc3 b4 15. cxb4 Bxb4 16. Be3 Ba5 17. Ng3 Bxf3 18. Qxf3 Bb6 19. Rac1 Bxe3 20. fxe3 Rab8 21. Bc4 Rb2 22. Bxa6 Ra8 23. Bb5 Nd4 24. exd4 Qxd4+ 25. Kh1 Rf2 26. Nf5 Qb2 27. Rb1 Qc2 28. Rdc1 Qd2 29. Qe3 Qa2 30. Bc4 Qd2 31. Qxd2 Rxd2 32. Bb5 g6 33. Ne3 Nh5 34. Rc2 Rxc2 35. Nxc2 Nf4 36. Nb4 c5 37. Nd5 Nxd5 38. exd5 Rd8 39. Bc6 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.30"]
[Round "6"]
[White "Bondarcuks, Timurs"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "1198"]
[BlackElo "1190"]
[PlyCount "46"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. 0-0 0-0 6. d3 Na5 7. Bb3 Nxb3 8. axb3 d5 9. Bg5 d4 10. Nd5 Be7 11. Bxf6 Bxf6 12. c3 c5 13. c4 Bd7 14. Ne1 b5 15. Qh5 a6 16. f4 exf4 17. Rxf4 Bg5 18. Rf1 h6 19. Nf3 Be6 20. cxb5 Bxd5 21. exd5 Qxd5 22. bxa6 Be3+ 23. Kh1 Qxh5 0-1

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.30"]
[Round "5"]
[White "Detjen, Mattes"]
[Black "Dorendorf, Mika"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1190"]
[BlackElo "1462"]
[PlyCount "34"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 e6 6. cxd4 Nc6 7. Nc3 d6 8. exd6 Bxd6 9. Bd3 a6 10. 0-0 Bd7 11. a3 h6 12. Bc2 Qc7 13. b4 Nxc3 14. Qd3 Nd5 15. b5 axb5 16. Qxb5 Nxd4 17. Qd3 Nxc2 0-1

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.29"]
[Round "4"]
[White "Schneble, Milan"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "E14"]
[WhiteElo "1418"]
[BlackElo "1190"]
[PlyCount "105"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. d4 d5 2. e3 Nf6 3. c4 e6 4. Nf3 Be7 5. Nc3 0-0 6. Bd3 b6 7. Qc2 Bb7 8. cxd5 exd5 9. 0-0 c5 10. dxc5 bxc5 11. Rd1 d4 12. exd4 Bxf3 13. gxf3 cxd4 14. Ne4 Nbd7 15. Kh1 Rc8 16. Qe2 Nh5 17. Rg1 Ndf6 18. Nxf6+ Bxf6 19. Qe4 g6 20. Qg4 Bg7 21. Bd2 Qd6 22. a3 Qd5 23. Rge1 Nf6 24. Qf4 Nh5 25. Qe4 Qd7 26. Rac1 Rce8 27. Qh4 Rxe1+ 28. Rxe1 Qb7 29. Qe4 Qxb2 30. Bb4 Qxf2 31. Bxf8 Bxf8 32. Rf1 Qe3 33. Re1 Qxe4 34. Rxe4 Bc5 35. a4 f5 36. Re8+ Kf7 37. Rc8 Bb6 38. Rc4 a5 39. Rc6 Bd8 40. Rd6 Bf6 41. Ra6 Bd8 42. Ra7+ Kg8 43. Ra8 Kg7 44. Rxd8 Kh6 45. Rxd4 Kg5 46. Rc4 h6 47. h4+ Kf6 48. Rc6+ Kf7 49. Kg1 Nf4 50. Bc4+ Kg7 51. Ra6 g5 52. hxg5 hxg5 53. Rxa5 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.28"]
[Round "3"]
[White "Detjen, Mattes"]
[Black "Goepfert, Gregor"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1190"]
[BlackElo "1603"]
[PlyCount "115"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. g3 b6 8. Bg2 Bb7 9. 0-0 0-0-0 10. b4 Bxd4 11. Bxd4 Nxd4 12. cxd4 d5 13. e5 Qe6 14. a4 a6 15. Qc1 Qg4 16. Rd1 h5 17. Rd2 Kb8 18. h3 Qg5 19. Ra3 h4 20. g4 f5 21. exf6 Qxf6 22. Rc3 Rd7 23. Rdc2 Qd6 24. b5 a5 25. Nd2 Ng6 26. Nf1 Nf4 27. Ne3 g6 28. Nf1 Ne6 29. Rd3 Rf7 30. Nd2 Qb4 31. Qa3 Qxa3 32. Rxa3 Nxd4 33. Rb2 Rhf8 34. Nb3 Nxb3 35. Raxb3 Rf4 36. Ra3 Kc8 37. Re2 Kd7 38. Kf1 Kd6 39. Ke1 Bc8 40. Raa2 Rd4 41. Red2 Rff4 42. Rxd4 Rxd4 43. Ke2 Kc5 44. Rc2+ Rc4 45. Rxc4+ Kxc4 46. f4 Be6 47. Kf3 Kb4 48. f5 gxf5 49. g5 Kxa4 50. g6 Kb3 51. Kf4 a4 52. Ke5 Bg8 53. Bxd5+ Bxd5 54. Kxd5 a3 55. g7 a2 56. g8Q a1Q 57. Kc6+ Kb4 58. Qf8+ 1/2-1/2

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.28"]
[Round "2"]
[White "Werner, Florin"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C92"]
[WhiteElo "1481"]
[BlackElo "1190"]
[PlyCount "53"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. c3 Na5 9. Bc2 d6 10. h3 Bb7 11. d4 c6 12. Nbd2 Qc7 13. Nf1 Rad8 14. Ng3 h6 15. Nh4 d5 16. Nhf5 dxe4 17. Bxe4 Nxe4 18. Nxe4 Qd7 19. Qg4 g6 20. Nxh6+ Kh7 21. Qxd7 Rxd7 22. dxe5 Nc4 23. Ng4 f5 24. exf6 Bd6 25. Bh6 Rfd8 26. Ng5+ Kg8 27. Bg7 1-0

[Event "GER-ch U12"]
[Site "Willingen"]
[Date "2020.10.27"]
[Round "1"]
[White "Detjen, Mattes"]
[Black "Fruth, David"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1190"]
[BlackElo "1665"]
[PlyCount "68"]
[EventDate "2020.10.26"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 199 Extra"]
[Source "ChessBase"]
[SourceDate "2021.01.31"]
[SourceVersion "1"]
[SourceVersionDate "2021.01.31"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Bd3 Nc6 8. Bf4 Be6 9. Qe2 Qd7 10. 0-0-0 0-0-0 11. Bb5 Kb8 12. Ne5 Qe8 13. Nxc6+ bxc6 14. Ba6 Ka8 15. b4 Bf6 16. Kd2 Qe7 17. b5 Bxc3+ 18. Kxc3 Qf6+ 19. Kd3 Qxf4 20. bxc6 Rhe8 21. Qf3 Bf5+ 22. Kc3 Qe5+ 23. Kb3 Be6+ 24. c4 d5 25. Rb1 dxc4+ 26. Ka4 Bc8 27. Bxc4 Rd4 28. Qb3 Ba6 29. Rhc1 Qc5 30. Rc2 Rxc4+ 31. Rxc4 Qxc4+ 32. Qxc4 Bxc4 33. Rb7 Rc8 34. Kb4 Ba6 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.22"]
[Round "9"]
[White "Detjen, Mattes"]
[Black "Artan, Tamir"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1251"]
[PlyCount "60"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. g3 a6 8. Bg2 d6 9. 0-0 Bd7 10. f4 0-0-0 11. b4 Ba7 12. a4 Ng6 13. b5 Nxd4 14. cxd4 a5 15. Nc3 h5 16. Rc1 Be6 17. f5 Bc4 18. Nd5 Bxd5 19. fxg6 Qe6 20. Rxf7 Qxg6 21. Rfxc7+ Kb8 22. exd5 h4 23. Qe1 h3 24. Bf1 Rde8 25. Qc3 Bb6 26. Rd7 Qf6 27. Rxd6 Rxe3 28. Rxf6 Rxc3 29. Rxc3 Bxd4+ 30. Kh1 Bxf6 1/2-1/2

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.21"]
[Round "8"]
[White "Popczynska, Maja"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[BlackElo "1251"]
[PlyCount "55"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. Nbd2 0-0 7. Nf1 Be6 8. Bb3 Qd7 9. Ng3 Rad8 10. Bg5 Ng4 11. d4 f6 12. dxc5 fxg5 13. 0-0 Qe7 14. Bxe6+ Qxe6 15. Nxg5 Qc8 16. Qd5+ Kh8 17. Nf7+ Rxf7 18. Qxf7 Nf6 19. cxd6 Rxd6 20. Rad1 Re6 21. Nf5 Qg8 22. Qxg8+ Kxg8 23. f3 Nh5 24. Rd7 Rg6 25. Rxc7 Nf4 26. g3 Nh3+ 27. Kh1 Ng5 28. Rxc6 1-0

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.20"]
[Round "7"]
[White "Detjen, Mattes"]
[Black "Cinkova, Vicky"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "1251"]
[BlackElo "1256"]
[PlyCount "58"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. Nxc6 bxc6 6. Qd4 Nf6 7. e5 Nh5 8. Bc4 Qb6 9. Qxb6 axb6 10. f4 Ng7 11. Nc3 Ne6 12. g3 Bg7 13. Be3 b5 14. Bd3 0-0 15. 0-0-0 b4 16. Ne4 Rxa2 17. Nc5 d6 18. Kb1 Ra8 19. exd6 exd6 20. Ne4 Rd8 21. Be2 d5 22. Nc5 d4 23. Nxe6 Bxe6 24. Bf2 c5 25. Bf3 Ra7 26. Kc1 c4 27. Kd2 c3+ 28. bxc3 dxc3+ 29. Ke1 Rxd1+ 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.19"]
[Round "6"]
[White "Lackova, Ludmila"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "D35"]
[WhiteElo "1013"]
[BlackElo "1251"]
[PlyCount "58"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 0-0 7. Bd3 c6 8. Nge2 Nbd7 9. 0-0 Ne4 10. Bxe7 Qxe7 11. Bxe4 dxe4 12. Rc1 Nb6 13. Qc2 f5 14. Rfd1 Be6 15. Nf4 Rf6 16. Rd2 Bc4 17. Rcd1 Rh6 18. g3 Qd8 19. b3 Ba6 20. d5 c5 21. Ne6 Qd6 22. Nf4 Rf8 23. Qb2 Nd7 24. Rc1 Qe7 25. Qa3 Qg5 26. Ne6 Qg4 27. Nxf8 Qh3 28. f4 exf3 29. Rf1 Qxf1# 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.18"]
[Round "5"]
[White "Detjen, Mattes"]
[Black "Bako, Evelin"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "1251"]
[BlackElo "1216"]
[PlyCount "84"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7. Bd3 Nc6 8. b3 Be6 9. Bb2 Bf6 10. 0-0 Qd7 11. b4 Nxb4 12. cxb4 Bxb2 13. Rb1 Bf6 14. a3 0-0 15. Qe2 Rfe8 16. Qd2 Qc6 17. Rfe1 Bc3 18. Qe2 Qd7 19. Red1 Ba2 20. Qf1 Bxb1 21. Rxb1 Re7 22. Rb3 Bf6 23. Bb5 c6 24. Bd3 Rae8 25. Bc4 d5 26. Rd3 Qc7 27. Bb3 Be5 28. c4 dxc4 29. Bxc4 Bf6 30. Bb3 Rd8 31. Bc2 Rxd3 32. Qxd3 g6 33. Qd2 Qd7 34. Qc1 Qe8 35. Qd2 Bg5 36. Qd1 Rd7 37. Qb1 Re7 38. Qd1 Bf6 39. h3 Rd7 40. Qb1 Qe2 41. Qc1 Bc3 42. Bb3 Qb2 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.16"]
[Round "3"]
[White "Detjen, Mattes"]
[Black "Hetfleischova, Elen"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1251"]
[BlackElo "1299"]
[PlyCount "70"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nc6 3. d4 cxd4 4. cxd4 g6 5. Nf3 Bg7 6. Nc3 d6 7. d5 Ne5 8. Bg5 Qb6 9. Qd2 Nxf3+ 10. gxf3 Bd7 11. Rc1 Nf6 12. a4 a6 13. Be3 Qd8 14. h4 0-0 15. Bh3 Bxh3 16. Rxh3 Qd7 17. Rh2 e6 18. Bd4 Rac8 19. Rd1 Rfe8 20. Bxf6 Bxf6 21. h5 Be5 22. Rh1 Bxc3 23. bxc3 e5 24. Qh6 Re7 25. hxg6 fxg6 26. Kd2 Qxa4 27. Rh3 Qa2+ 28. Ke1 Rxc3 29. Kf1 Qb3 30. Re1 Rxf3 31. Rxf3 Qxf3 32. Re3 Qf6 33. Rc3 Rf7 34. Ke1 Qxf2+ 35. Kd1 Qd4+ 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.15"]
[Round "2"]
[White "Bangerter, Ena"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1514"]
[BlackElo "1251"]
[PlyCount "67"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Nxd5 Qxd5 5. Qf3 Qd8 6. Bc4 e6 7. Ne2 Bc5 8. Qc3 Nc6 9. Qxg7 Rf8 10. Qxh7 Qf6 11. 0-0 Rh8 12. Qe4 Rh4 13. Qd3 Ne5 14. Bb5+ c6 15. Qc3 Bb6 16. Bd3 Bd7 17. Ng3 Bc7 18. Be2 Qh6 19. h3 0-0-0 20. d4 Qh7 21. dxe5 Rh8 22. Nh1 Ba5 23. Qf3 Bb6 24. Bd3 Qg7 25. Qg3 Qf8 26. Be3 Bc7 27. Bg5 R4h5 28. Bf6 Rg8 29. Qf3 Rh6 30. Qe3 Bb6 31. Qf3 c5 32. Ng3 Bc6 33. Be4 Bxe4 34. Qxe4 1-0

[Event "DSOL 08 Liga Gr-A 1st"]
[Site "Playchess.com INT"]
[Date "2020.08.14"]
[Round "2.2"]
[White "Fiedler, Maximilian"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1000"]
[BlackElo "1183"]
[PlyCount "78"]
[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 "Zell Schwarz Weiss II"]
[BlackTeam "Werder Bremen III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Nc3 e6 3. Bf4 Nf6 4. Nb5 Bd6 5. Nxc7+ Qxc7 6. Bxd6 Qxd6 7. Nf3 Nc6 8. e3 Qb4+ 9. c3 Qxb2 10. Rb1 Qxc3+ 11. Nd2 Qa3 12. Bb5 Qd6 13. Bxc6+ Qxc6 14. 0-0 Qd6 15. f3 0-0 16. e4 e5 17. f4 exd4 18. e5 Qe6 19. exf6 Qxf6 20. Re1 Qxf4 21. Nf3 b6 22. Nxd4 Bb7 23. Re2 Rfe8 24. Rc1 Rxe2 25. Nxe2 Qd6 26. Nd4 Qd7 27. Rc2 Re8 28. Qc1 h6 29. Nc6 a6 30. h3 Qe6 31. Nb4 d4 32. Nd3 Rc8 33. Rxc8+ Qxc8 34. Qb2 Qd8 35. Ne5 b5 36. a4 Qd5 37. Nd3 bxa4 38. Nb4 Qe4 39. Nc2 Qxg2# 0-1

[Event "EU Union-ch U12"]
[Site "Kouty nad Desnou"]
[Date "2020.08.14"]
[Round "1"]
[White "Megyeri, Martin"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "1694"]
[BlackElo "1251"]
[PlyCount "55"]
[EventDate "2020.08.14"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "CZE"]
[SourceTitle "EXT 2021"]
[Source "ChessBase"]
[SourceDate "2020.10.23"]
[SourceVersion "1"]
[SourceVersionDate "2020.10.23"]
[SourceQuality "1"]

1. Nf3 e6 2. b3 d5 3. Bb2 Nf6 4. e3 Be7 5. d4 b6 6. Nbd2 0-0 7. Be2 Bb7 8. c4 c5 9. 0-0 Nc6 10. Rc1 Qd6 11. Qc2 Rac8 12. Qb1 Rfd8 13. Rfd1 Qd7 14. dxc5 bxc5 15. Qa1 Qd6 16. h3 Rd7 17. cxd5 exd5 18. Ne5 Nxe5 19. Bxe5 Qc6 20. Nf3 Qb6 21. Bd3 Rcd8 22. Bf5 d4 23. Bxd7 Bxf3 24. gxf3 Rxd7 25. exd4 cxd4 26. Bxd4 Qb7 27. Qc3 Rd8 28. Bxf6 1-0

[Event "DSOL 08 Liga Gr-A 1st"]
[Site "Playchess.com INT"]
[Date "2020.08.04"]
[Round "7.1"]
[White "Detjen, Mattes"]
[Black "Klerx, Philipp"]
[Result "1-0"]
[ECO "C46"]
[WhiteElo "1183"]
[BlackElo "1253"]
[PlyCount "47"]
[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 "Werder Bremen III"]
[BlackTeam "Paderborn Blauer Springer V"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. Nc3 Bg4 5. d5 Nd4 6. Be2 Nxe2 7. Qxe2 Nf6 8. Bg5 Be7 9. h3 Bd7 10. 0-0 h6 11. Bh4 g5 12. Bg3 Nh5 13. Bh2 Nf4 14. Qe3 c6 15. Rad1 Qc7 16. Ne2 cxd5 17. exd5 Qxc2 18. Rd2 Qc4 19. Nc3 h5 20. Re1 f6 21. Rd4 Qc7 22. Bxf4 gxf4 23. Rxf4 exf4 24. Qxe7# 1-0

[Event "DSOL 08 Liga Gr-A 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.30"]
[Round "6.3"]
[White "Detjen, Mattes"]
[Black "Vesszoe, Aaron"]
[Result "1-0"]
[ECO "C02"]
[WhiteElo "1183"]
[BlackElo "951"]
[PlyCount "63"]
[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 "Werder Bremen III"]
[BlackTeam "Paderborn Akademie II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Nc6 5. Nf3 Qb6 6. Bd3 Nxd4 7. cxd4 cxd4 8. Nxd4 Qxd4 9. Bb5+ Bd7 10. Bxd7+ Kxd7 11. Qxd4 Rc8 12. Nc3 a6 13. 0-0 Ne7 14. f4 Ng6 15. f5 Bc5 16. Qxc5 Rxc5 17. fxg6 fxg6 18. Rf7+ Kc8 19. Rxg7 d4 20. Ne4 Rxe5 21. Nd6+ Kb8 22. Nf7 Rf8 23. Bf4 Kc8 24. Bxe5 h5 25. Nd6+ Kd8 26. Nxb7+ Ke8 27. Bc7 Rf7 28. Nd6+ Kf8 29. Rxf7+ Kg8 30. Re1 Kh8 31. Rxe6 Kg8 32. Re8# 1-0

[Event "DSOL 08 Liga Gr-A 1st"]
[Site "Playchess.com INT"]
[Date "2020.07.09"]
[Round "3.1"]
[White "Hecht, Jonas Christian"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1874"]
[BlackElo "1183"]
[PlyCount "99"]
[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 "Kreuzberg III"]
[BlackTeam "Werder Bremen III"]
[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 Nb6 9. Nd2 d5 10. exd6 cxd6 11. Qxe7+ Bxe7 12. Bd3 Ba6 13. 0-0 d5 14. Re1 dxc4 15. Bf1 Rb8 16. b3 Rb7 17. bxc4 0-0 18. Rb1 Bf6 19. c5 Bxf1 20. Nxf1 Rd8 21. cxb6 axb6 22. Be3 c5 23. Bxc5 Bc3 24. Red1 Rdb8 25. Bxb6 h6 26. Rb3 Be5 27. Bd4 Bxd4 28. Rxb7 Bxf2+ 29. Kxf2 Rxb7 30. Rd2 f6 31. Ne3 Kf7 32. Nc4 Rb4 33. Rc2 Kg6 34. a3 Rb7 35. a4 Ra7 36. a5 Kf7 37. Re2 Ra6 38. Kf3 Kg8 39. Kf4 Kf8 40. Kf5 Kf7 41. h4 Rc6 42. Rc2 Ra6 43. h5 Rc6 44. Ne5+ fxe5 45. Rxc6 e4 46. Kxe4 g5 47. hxg6+ Kg7 48. Kf5 h5 49. Rc7+ Kh6 50. Rh7# 1-0

[Event "DSOL 08 Liga Gr-A 1st"]
[Site "Playchess.com INT"]
[Date "2020.06.25"]
[Round "1.3"]
[White "Detjen, Mattes"]
[Black "Pavlova Erbis, Angelina"]
[Result "1-0"]
[ECO "C44"]
[WhiteElo "1183"]
[BlackElo "1000"]
[PlyCount "43"]
[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 "Werder Bremen III"]
[BlackTeam "Alzenau Koenigsspringer III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. d4 f6 4. Bc4 d6 5. Bb5 Bd7 6. Nc3 a6 7. Bc4 Bg4 8. d5 Nce7 9. h3 Bd7 10. Nh4 Nh6 11. Bxh6 gxh6 12. b4 b5 13. Bb3 c6 14. 0-0 c5 15. bxc5 dxc5 16. d6 Ng6 17. Qh5 Rg8 18. Bxg8 Bxd6 19. Nxg6 Qa5 20. Nxe5+ Ke7 21. Qf7+ Kd8 22. Qxd7# 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.14"]
[Round "10"]
[White "Jumah, Shayan"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "1295"]
[BlackElo "1296"]
[PlyCount "85"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. 0-0 0-0 8. Be3 d6 9. Nc3 Na5 10. Bd5 Nxd5 11. Nxd5 c5 12. Nxe7+ Qxe7 13. Bg5 f6 14. Bh4 Bg4 15. h3 Bh5 16. Qe2 Qe6 17. Qe3 f5 18. Ng5 Qe8 19. exf5 Rxf5 20. g4 Bxg4 21. hxg4 Rf4 22. Qg3 Qd7 23. f3 c4 24. Qh3 cxd3 25. cxd3 Rd4 26. Be1 h6 27. Ne4 Nb7 28. f4 Rxd3 29. Qxd3 Qxg4+ 30. Qg3 Qe2 31. Qf3 Qxb2 32. Bc3 Qa3 33. fxe5 d5 34. Qf7+ Kh7 35. Nf6+ Kh8 36. Nh5 Rg8 37. Qc7 Qa4 38. Rf4 Qc2 39. Ng3 b4 40. Rxb4 Qg6 41. Kg2 Qc2+ 42. Kh3 Nd8 43. Rb8 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.14"]
[Round "9"]
[White "Yue, Qihang"]
[Black "Detjen, Mattes"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "1354"]
[BlackElo "1296"]
[PlyCount "86"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 0-0 6. e3 Nbd7 7. Bd3 b6 8. 0-0 Bb7 9. Re1 c5 10. cxd5 Nxd5 11. Bxe7 Qxe7 12. e4 Nb4 13. Bc4 Nc6 14. d5 Na5 15. Bf1 exd5 16. exd5 Qd6 17. Qd2 Qg6 18. Rad1 Nf6 19. Qf4 Rad8 20. d6 Nh5 21. Qg5 Qxg5 22. Nxg5 Nf6 23. Re7 Bc6 24. Bb5 Bd7 25. Bxd7 Nxd7 26. b3 Nc6 27. Re3 Nd4 28. Ne2 Nf5 29. Rh3 Nf6 30. Rhd3 Rfe8 31. Kf1 Ng4 32. Nf3 Nge3+ 33. fxe3 Nxe3+ 34. Rxe3 Rxe3 35. Rd5 Re6 36. d7 Re7 37. Ne5 Re6 38. Ng3 f6 39. Nc4 Re7 40. Nf5 Rexd7 41. Ne7+ Kf8 42. Rxd7 Rxd7 43. Nf5 Rd1+ 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.13"]
[Round "8"]
[White "Detjen, Mattes"]
[Black "Feidt, Marius"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1296"]
[PlyCount "71"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. dxe5 Qe7 5. Nc3 Nh6 6. exd6 cxd6 7. Bb5 Bg4 8. 0-0 a6 9. Bxc6+ bxc6 10. Re1 f6 11. Be3 Nf7 12. h3 Bh5 13. a4 a5 14. Rb1 Qe6 15. b4 Be7 16. bxa5 0-0 17. Rb6 Rfc8 18. Rb3 Rxa5 19. Bb6 Raa8 20. Ne2 f5 21. exf5 Qf6 22. Bd4 Qxf5 23. Ng3 Qg6 24. Rxe7 h6 25. Nxh5 Qxh5 26. Rbb7 Rf8 27. Bc3 Rxa4 28. Qxd6 Rc4 29. Qd3 Rf4 30. Qe3 Rf6 31. Bxf6 gxf6 32. Qe6 Qa5 33. Rxf7 Qa1+ 34. Kh2 Qa3 35. Rxf8+ Kxf8 36. Qf7# 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.12"]
[Round "6"]
[White "Detjen, Mattes"]
[Black "Buchinger, Alexis"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1296"]
[BlackElo "1291"]
[PlyCount "79"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Be3 cxd4 7. cxd4 Bb4+ 8. Nc3 0-0 9. Be2 b6 10. 0-0 Bxc3 11. bxc3 Ba6 12. Ne5 Bxe2 13. Qxe2 Nbd7 14. Nf3 Rac8 15. Qc2 Ne4 16. Bd2 Nxd2 17. Qxd2 Nf6 18. Rfc1 Ne4 19. Qe3 Qc4 20. Qxe4 b5 21. Ng5 g6 22. Qh4 h5 23. a3 e5 24. Ne4 Qe6 25. d5 Qb6 26. Qg5 f5 27. Ng3 Kf7 28. Re1 Qd6 29. Qd2 h4 30. Nf1 Rh8 31. h3 Rcg8 32. Qc2 Qxd5 33. Rad1 Qe6 34. f4 Qb6+ 35. Qf2 Qxf2+ 36. Kxf2 exf4 37. Kf3 Rc8 38. Kxf4 Rxc3 39. Rd7+ Kf6 40. Rxa7 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.12"]
[Round "7"]
[White "Lumma, Justus"]
[Black "Detjen, Mattes"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "1077"]
[BlackElo "1296"]
[PlyCount "57"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d6 Qxd6 4. Nf3 Bg4 5. Be2 Nc6 6. Nc3 e5 7. 0-0 Be7 8. d3 0-0 9. Bg5 h6 10. Bh4 Rad8 11. h3 Bh5 12. Qd2 Rfe8 13. Rfe1 e4 14. Nh2 exd3 15. cxd3 Bxe2 16. Rxe2 Qxd3 17. Qxd3 Rxd3 18. Bxf6 gxf6 19. Ng4 Kg7 20. Nb5 Red8 21. Ne3 Nd4 22. Nxd4 R3xd4 23. Nf5+ Kf8 24. Nxd4 Rxd4 25. Rae1 Rd7 26. Re4 b6 27. Rh4 Kg7 28. Kh2 Bd6+ 29. g3 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.11"]
[Round "5"]
[White "Yang, Marco"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1278"]
[BlackElo "1296"]
[PlyCount "83"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Nxe4 8. 0-0 Bxc3 9. d5 Bf6 10. Re1 Ne7 11. Rxe4 d6 12. Ng5 Bxg5 13. Bxg5 h6 14. Rxe7+ Qxe7 15. Bxe7 Kxe7 16. Qe2+ Kd8 17. Re1 Bd7 18. Qe7+ Kc8 19. Qxf7 g5 20. Re7 Rd8 21. Bb5 c6 22. dxc6 bxc6 23. Ba6+ Kc7 24. Qc4 Rab8 25. b4 Rb6 26. a4 Kb8 27. Rxd7 Re8 28. Kf1 Ka8 29. Rb7 Rxb7 30. Bxb7+ Kxb7 31. Qf7+ Kb6 32. Qxe8 a5 33. Qd8+ Kb7 34. bxa5 c5 35. Qb6+ Kc8 36. Qxd6 g4 37. a6 g3 38. a7 Kb7 39. Qb8+ Kc6 40. a8Q+ Kd7 41. Qa6 gxh2 42. Qbb7+ 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.10"]
[Round "3"]
[White "Bruegmann, Nick"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "1415"]
[BlackElo "1296"]
[PlyCount "119"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 a6 6. a4 d6 7. h3 h6 8. 0-0 0-0 9. Re1 Be6 10. Bxe6 fxe6 11. Nbd2 d5 12. exd5 exd5 13. Nxe5 Nd7 14. Nxc6 bxc6 15. d4 Bd6 16. Nf3 Qf6 17. Qe2 Rae8 18. Be3 a5 19. Qd3 Qd8 20. Bd2 Qb8 21. Red1 Rf6 22. Qc2 c5 23. dxc5 Bxc5 24. Nd4 Rf7 25. Be3 Bb6 26. Rab1 c5 27. Nb5 Ref8 28. Rf1 Ne5 29. f4 Nc4 30. Bf2 Rxf4 31. Qd3 Ne5 32. Qxd5+ Nf7 33. Bxc5 Rxf1+ 34. Rxf1 Bxc5+ 35. Qxc5 Qg3 36. Qf2 Qg5 37. Nd6 Qe7 38. Nxf7 Rxf7 39. Qxf7+ Qxf7 40. Rxf7 Kxf7 41. Kf2 Ke6 42. Ke3 Ke5 43. g3 g5 44. b4 axb4 45. cxb4 Kd6 46. Ke4 Ke6 47. a5 Kd6 48. b5 Kc7 49. a6 Kb6 50. Kf5 g4 51. Kxg4 h5+ 52. Kxh5 Ka7 53. g4 Kb8 54. g5 Kc8 55. g6 Kd8 56. g7 Kc7 57. g8Q Kb6 58. Qd8+ Ka7 59. Qc7+ Ka8 60. Qb7# 1-0

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.10"]
[Round "4"]
[White "Detjen, Mattes"]
[Black "Shkundin, Maximilian"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "1296"]
[BlackElo "1224"]
[PlyCount "46"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d6 3. d4 cxd4 4. cxd4 e6 5. Nf3 Nf6 6. Nc3 Be7 7. Bc4 0-0 8. 0-0 Bd7 9. e5 Ne8 10. Qd3 Nc6 11. exd6 Nxd6 12. Bb3 Nf5 13. Bc2 Nb4 14. Qe4 Bc6 15. d5 Bxd5 16. Nxd5 Nxd5 17. Rd1 Qc7 18. Qe2 Nd6 19. Bg5 Bxg5 20. Nxg5 h6 21. Nxe6 Qe7 22. Qd3 fxe6 23. Qh7+ Kf7 1/2-1/2

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.09"]
[Round "2"]
[White "Detjen, Mattes"]
[Black "Burkart, Lloyd Shang"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1296"]
[BlackElo "1411"]
[PlyCount "58"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 e6 5. Nf3 Nf6 6. Be3 cxd4 7. Bxd4 Be7 8. Be2 Nc6 9. 0-0 0-0 10. Nbd2 Nxd4 11. Nxd4 a6 12. Bc4 Qd7 13. Re1 Nd5 14. Qh5 b5 15. Bd3 Nf6 16. Qf3 Bb7 17. Qg3 Bd6 18. Qh4 h6 19. f3 Bc5 20. Kh1 Rfd8 21. N2b3 Bc6 22. Be2 Rac8 23. Rad1 Qe8 24. Qg3 a5 25. Nf5 Nh5 26. Qg4 Rxd1 27. Bxd1 exf5 28. Rxe8+ Rxe8 29. Qxh5 Re1# 0-1

[Event "GER-ch U10"]
[Site "Willingen"]
[Date "2019.06.09"]
[Round "1"]
[White "Goldmann, David"]
[Black "Detjen, Mattes"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "1477"]
[BlackElo "1296"]
[PlyCount "74"]
[EventDate "2019.06.08"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "GER"]
[SourceTitle "CBM 191 Extra"]
[Source "ChessBase"]
[SourceDate "2019.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2019.09.30"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Bd3 d5 7. e5 Ng4 8. 0-0 Bc5 9. Bf4 f6 10. h3 Nxe5 11. Bxe5 fxe5 12. Qh5+ Kf8 13. Qxe5 Bd6 14. Qe3 Qf6 15. c3 Qf4 16. Qxf4+ Bxf4 17. Na3 Kf7 18. c4 Rb8 19. Rab1 Ba6 20. Rfd1 Be5 21. b3 Bd6 22. Nc2 dxc4 23. Bxc4+ Bxc4 24. bxc4 Rxb1 25. Rxb1 Re8 26. Kf1 Re4 27. Ne3 Bc5 28. Rb7 Bb6 29. c5 Bxc5 30. Rxc7+ Re7 31. Rxc6 Bxe3 32. fxe3 Rxe3 33. Kf2 Ra3 34. Rc2 Kf6 35. Ke1 h5 36. Kd1 g5 37. Rf2+ Kg6 1/2-1/2

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.06"]
[Round "7"]
[White "Detjen, Mattes"]
[Black "Janssen, Markus"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1123"]
[PlyCount "166"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nge7 5. Nc3 Nxd4 6. Qxd4 Nc6 7. Qd1 Bb4 8. Bd2 0-0 9. Bc4 b6 10. 0-0 Bb7 11. a3 Bc5 12. Re1 Qf6 13. Rf1 Bd4 14. Qg4 Ne5 15. Qe2 Rfe8 16. Rae1 Bc5 17. Bb3 Qg6 18. Kh1 a5 19. f3 Ba6 20. Nb5 c6 21. c4 cxb5 22. cxb5 Bb7 23. Be3 Bxe3 24. Qxe3 Rac8 25. Bd5 Bxd5 26. exd5 Qd6 27. f4 Qc5 28. Qxc5 Rxc5 29. Rxe5 Rxe5 30. fxe5 Rxb5 31. Rd1 Kf8 32. Rd2 Ke7 33. Kg1 d6 34. exd6+ Kxd6 35. Rf2 f6 36. Kf1 Rxd5 37. Ke2 Kc5 38. Ke3 Kc4 39. Rc2+ Kb3 40. Re2 Re5+ 41. Kd2 Rxe2+ 42. Kxe2 Kxb2 43. Kf3 Kxa3 44. Ke3 b5 45. Kd2 Kb2 46. Kd3 a4 47. Kd4 a3 48. Kc5 a2 49. Kxb5 a1Q 50. Kc6 Qc1+ 51. Kd6 Qe1 52. Kd5 Qf2 53. Kc6 Qxg2+ 54. Kb6 Qxh2 55. Kb7 f5 56. Kc6 Qc2+ 57. Kb7 Qa4 58. Kc8 Qa8+ 59. Kd7 Qb8 60. Ke7 f4 61. Kf7 Qb7+ 62. Ke6 f3 63. Kd6 f2 64. Ke6 Qf3 65. Kd6 f1N 66. Ke6 g5 67. Ke5 g4 68. Kd6 g3 69. Kc7 g2 70. Kd7 g1N 71. Kc7 h5 72. Kd7 h4 73. Ke7 h3 74. Kd6 h2 75. Ke7 h1N 76. Ke6 Nhg3 77. Ke5 Ne3 78. Ke6 N1e2 79. Ke5 Ng4+ 80. Kd6 Nf5+ 81. Kd7 Ned4 82. Kd8 Ne5 83. Ke8 Qa8# 0-1

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.05"]
[Round "6"]
[White "Brumund, Lars"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "D00"]
[BlackElo "1123"]
[PlyCount "65"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 e6 3. Nc3 Nf6 4. Bf4 Be7 5. e3 0-0 6. Bd3 b6 7. e4 dxe4 8. Nxe4 Bb7 9. Nxf6+ Bxf6 10. Be2 Nd7 11. 0-0 c5 12. dxc5 bxc5 13. c3 Re8 14. Bb5 Re7 15. Bd6 Re8 16. Be5 Nxe5 17. Bxe8 Nxf3+ 18. gxf3 Qxd1 19. Rfxd1 Rxe8 20. f4 e5 21. Rd7 Rb8 22. f5 Bc8 23. Rxa7 Bxf5 24. Rd1 g6 25. a4 Rxb2 26. Ra1 Kf8 27. Ra8+ Ke7 28. Rc8 Bxc8 29. a5 Ba6 30. c4 e4 31. Kf1 Bxc4+ 32. Ke1 Re2+ 33. Kf1 0-1

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.05"]
[Round "5"]
[White "Detjen, Mattes"]
[Black "Ahlers, Quentin"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1123"]
[BlackElo "1229"]
[PlyCount "94"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4 b6 6. Nc3 Nf6 7. e5 Bc5 8. Qd3 Ng4 9. Be3 Nxe3 10. fxe3 0-0 11. 0-0-0 Qg5 12. Re1 Qxe5 13. h4 Qg3 14. Qe2 Re8 15. Rh3 Qe5 16. h5 d6 17. Rf3 Bg4 18. Nd1 Re7 19. h6 g6 20. Qf2 Bxf3 21. Qxf3 Rae8 22. Kd2 d5 23. Bb5 Rd8 24. c3 d4 25. exd4 Qxe1+ 26. Kc2 Re6 27. Bc4 Be7 28. Bxe6 Qxe6 29. a3 Re8 30. Qd3 Bg5 31. Qb5 Qe2+ 32. Qxe2 Rxe2+ 33. Kd3 Rd2+ 34. Kc4 Rxd1 35. a4 Rd2 36. a5 Rxg2 37. axb6 axb6 38. b4 f5 39. Kd3 Rd2+ 40. Kc4 f4 41. d5 f3 42. d6 f2 43. dxc7 f1Q+ 44. Kb3 Qf7+ 45. Ka3 Qxc7 46. Ka4 Qc4 47. Ka3 Ra2# 0-1

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.04"]
[Round "4"]
[White "Kuipers, Hartmut"]
[Black "Detjen, Mattes"]
[Result "1/2-1/2"]
[ECO "D55"]
[WhiteElo "1044"]
[BlackElo "1123"]
[PlyCount "139"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. c4 e6 2. Nc3 d5 3. cxd5 exd5 4. d4 Nf6 5. Bg5 Be7 6. e3 0-0 7. Bd3 b6 8. Nf3 Bb7 9. 0-0 Nbd7 10. Rc1 c5 11. dxc5 bxc5 12. Re1 Qb6 13. b3 d4 14. exd4 cxd4 15. Rxe7 dxc3 16. Bxf6 Nxf6 17. Bc4 Ng4 18. Rc2 Qc5 19. Qd7 Bxf3 20. gxf3 Nf6 21. Qb7 Rab8 22. Qxa7 Qf5 23. Rxc3 Qb1+ 24. Kg2 Qg6+ 25. Kf1 Qb1+ 26. Re1 Qg6 27. Bd3 Qh5 28. Kg2 Qg5+ 29. Kh1 h5 30. Bc4 Rfc8 31. Bxf7+ Kh7 32. Rxc8 Rxc8 33. Qe3 Qh4 34. Qd3+ Kh8 35. Rg1 Qxf2 36. Qf1 Qxa2 37. Qg2 Qxg2+ 38. Rxg2 Rc3 39. Rf2 Rc1+ 40. Kg2 g5 41. Rb2 h4 42. h3 Kg7 43. Be6 Kf8 44. Kf2 Ke7 45. Ke3 Kxe6 46. b4 Nd5+ 47. Kd4 Rc3 48. Re2+ Kd6 49. Re5 Nxb4 50. Rxg5 Rxf3 51. Rg6+ Ke7 52. Rg7+ Kf6 53. Rb7 Nc6+ 54. Kd5 Ne5 55. Rb6+ Kf5 56. Rh6 Rd3+ 57. Kc5 Rxh3 58. Rh5+ Kf4 59. Kd4 Nf3+ 60. Kd3 Kg3 61. Ke3 Kg2 62. Rh7 Rh1 63. Rg7+ Kf1 64. Rf7 h3 65. Rxf3+ Kg1 66. Rg3+ Kf1 67. Rf3+ Ke1 68. Rg3 h2 69. Rh3 Kf1 70. Kf3 1/2-1/2

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.03"]
[Round "2"]
[White "Detjen, Mattes"]
[Black "Berkenkamp, Matthis"]
[Result "1/2-1/2"]
[ECO "C41"]
[WhiteElo "1123"]
[PlyCount "121"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 d6 4. dxe5 Qe7 5. exd6 cxd6 6. Nc3 Nf6 7. Bg5 Qe6 8. Bd3 d5 9. 0-0 dxe4 10. Nxe4 Nxe4 11. Bxe4 Qxe4 12. Re1 Qe6 13. Rxe6+ Bxe6 14. Qd2 f6 15. Bf4 Be7 16. Re1 Bf7 17. Bd6 Rd8 18. c4 0-0 19. c5 Rfe8 20. Qf4 g6 21. Bxe7 Rxe7 22. Rf1 f5 23. Qh6 Rde8 24. Ng5 Bc4 25. Qxh7+ Rxh7 26. Nxh7 Kxh7 27. Ra1 Nd4 28. g3 Bd5 29. Rd1 Kh6 30. f4 Kh5 31. Rxd4 Bxa2 32. Ra4 Kg4 33. Rxa2 Kf3 34. Ra1 Re2 35. Ra3+ Kg4 36. b4 a6 37. c6 bxc6 38. Rxa6 Rc2 39. Rb6 Kf3 40. h4 Kxg3 41. Kf1 Kxf4 42. b5 Kf3 43. Ke1 Ke3 44. Kd1 Rb2 45. Rxc6 Rxb5 46. Rxg6 f4 47. Re6+ Kf3 48. Rg6 Re5 49. Rg5 Re8 50. h5 Rh8 51. Ke1 Ra8 52. h6 Ra1+ 53. Kd2 Ke4 54. Rg4 Rh1 55. Rg6 Kf5 56. Rc6 Kg5 57. Ke2 Rxh6 58. Rxh6 Kxh6 59. Kf3 Kg5 60. Kf2 Kg4 61. Kg2 1/2-1/2

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2019.01.03"]
[Round "1"]
[White "Koenig, Emmilie"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1272"]
[BlackElo "1123"]
[PlyCount "69"]
[EventDate "2019.01.03"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 e6 3. e3 Nf6 4. Nd2 Be7 5. Bd3 0-0 6. Ngf3 b6 7. c3 Bb7 8. Ne5 Nbd7 9. Qc2 h6 10. 0-0-0 c5 11. Rhg1 c4 12. Be2 a5 13. g4 a4 14. g5 hxg5 15. Bxg5 a3 16. b3 cxb3 17. Nxb3 Rc8 18. Bh6 Ne8 19. Rg3 Bf6 20. Rh3 Nd6 21. Nxd7 Qxd7 22. Rg1 Nf5 23. Bg5 Bxg5 24. Rxg5 Qe7 25. Rgh5 f6 26. Kd1 Qe8 27. Rh8+ Kf7 28. Bh5+ g6 29. Rxf8+ Qxf8 30. Bg4 Nd6 31. Rh7+ Ke8 32. Bxe6 Ra8 33. Qxg6+ Kd8 34. Rd7+ Kc8 35. Rf7+ 1-0

[Event "Harburg-chH 13th"]
[Site "Hamburg"]
[Date "2018.08.05"]
[Round "4"]
[White "Detjen, Mattes"]
[Black "Eickmeier, Bernd"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1184"]
[BlackElo "1201"]
[PlyCount "148"]
[EventDate "2018.08.03"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nge7 5. Nc3 g6 6. Bc4 Bg7 7. Nf3 d6 8. 0-0 a6 9. Bg5 b5 10. Bd5 f6 11. Be3 Rb8 12. Nd4 Nxd4 13. Bxd4 c6 14. Bb3 c5 15. Be3 c4 16. Qd2 cxb3 17. axb3 0-0 18. Bh6 g5 19. Bxg7 Kxg7 20. f4 h6 21. fxg5 hxg5 22. Rf2 Rb6 23. Raf1 Ng6 24. Nd5 Rb7 25. Nxf6 Qb6 26. Nd5 Qd8 27. Qd4+ Ne5 28. Rxf8 Qa5 29. Qe3 Rf7 30. Qxg5+ Kxf8 31. Qh6+ Ke8 32. Qh8+ Kd7 33. Nf6+ Kc7 34. Ne8+ Kc6 35. h4 Bd7 36. Rxf7 Nxf7 37. Qf6 Bxe8 38. Qe7 Qd8 39. Qf8 Kd7 40. h5 Qh4 41. g4 Qxg4+ 42. Kf1 Qxh5 43. Qg7 Qd1+ 44. Kf2 Qxc2+ 45. Kf3 Qxb3+ 46. Kf4 Kc6 47. Qf8 Qe6 48. Qg7 a5 49. Qc3+ Kb6 50. Qd4+ Ka6 51. Qd3 Ne5 52. Qc2 Qc4 53. Qd2 Nd3+ 54. Kg4 Qxe4+ 55. Kh3 Bd7+ 56. Kg3 Qe1+ 57. Qxe1 Nxe1 58. Kf2 Nd3+ 59. Ke2 Nxb2 60. Kd2 Nc4+ 61. Kc2 a4 62. Kb1 b4 63. Kc1 d5 64. Kc2 d4 65. Kd3 Kb5 66. Kc2 a3 67. Kd1 a2 68. Ke2 a1Q 69. Kf3 Qf1+ 70. Kg3 Ne3 71. Kh4 Bc6 72. Kg5 Be4 73. Kh5 Qg1 74. Kh6 Qg6# 0-1

[Event "Harburg-chH 13th"]
[Site "Hamburg"]
[Date "2018.08.05"]
[Round "5"]
[White "Oellrich, Emma"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1139"]
[BlackElo "1184"]
[PlyCount "99"]
[EventDate "2018.08.03"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. d4 d5 2. Bf4 e6 3. e3 Nf6 4. c3 Be7 5. Nd2 0-0 6. Ngf3 b6 7. Bd3 Bb7 8. 0-0 Nbd7 9. Qc2 c5 10. Ne5 Rc8 11. Bb5 Nxe5 12. dxe5 Ne4 13. Rad1 Ng5 14. h4 Ne4 15. Nxe4 Bxh4 16. Nd6 Rc7 17. Nxb7 Rxb7 18. e4 c4 19. Bxc4 Rd7 20. Bb5 Rc7 21. exd5 exd5 22. e6 Re7 23. exf7+ Rexf7 24. Be3 Rf5 25. Bd3 Rh5 26. Qe2 Qe8 27. Bb5 Qe5 28. f4 Qf5 29. Qd3 Rd8 30. Qxf5 Rxf5 31. c4 Rh5 32. Bc6 Rd6 33. cxd5 Rdh6 34. f5 Bg3 35. Bxh6 Rxh6 36. Rf3 Bd6 37. Re1 Bc5+ 38. Kf1 Rh1+ 39. Ke2 Rh2 40. Kd1 Rxg2 41. Re2 Rg1+ 42. Re1 Rg2 43. Kc1 Bb4 44. Rd1 Bd6 45. f6 gxf6 46. Rxf6 Be5 47. Re6 Bxb2+ 48. Kb1 Ba3 49. d6 Rb2+ 50. Ka1 1-0

[Event "Harburg-chH 13th"]
[Site "Hamburg"]
[Date "2018.08.04"]
[Round "3"]
[White "Ahlers, Quentin"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1203"]
[BlackElo "1184"]
[PlyCount "95"]
[EventDate "2018.08.03"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. Nc3 Nf6 3. exd5 Nxd5 4. Bc4 c6 5. d4 Bf5 6. Qf3 e6 7. Nxd5 cxd5 8. Bb5+ Nc6 9. Qc3 Qb6 10. a4 Bb4 11. Qxb4 Bxc2 12. a5 Qc7 13. Qc5 Be4 14. f3 Bf5 15. a6 Rc8 16. axb7 Qxb7 17. Ba6 Qb8 18. Bxc8 Qxc8 19. Ne2 Qd7 20. Nf4 Qc7 21. 0-0 e5 22. Nxd5 Qd7 23. Qb5 exd4 24. Re1+ Be6 25. Nf4 0-0 26. Nxe6 fxe6 27. Re5 Qd6 28. Rc5 Ne7 29. Ra6 Qd8 30. Bg5 h6 31. Bh4 Rf4 32. g3 Rf8 33. Rxa7 Rf7 34. Qb7 Kf8 35. Ra8 Nc8 36. Qxf7+ Kxf7 37. Bxd8 Ne7 38. Rc7 d3 39. Rxe7+ Kg6 40. Ra6 d2 41. Raxe6+ Kh7 42. Rd7 h5 43. Ree7 d1Q+ 44. Rxd1 h4 45. Rdd7 h3 46. Rxg7+ Kh8 47. Rge7 Kg8 48. Re8# 1-0

[Event "Harburg-chH 13th"]
[Site "Hamburg"]
[Date "2018.08.04"]
[Round "2"]
[White "Detjen, Mattes"]
[Black "Niemann, Marcel"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1184"]
[BlackElo "1152"]
[PlyCount "72"]
[EventDate "2018.08.03"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nge7 5. Nc3 g6 6. Bc4 Bg7 7. Qf3 0-0 8. Bg5 Nxd4 9. Qd3 Ndc6 10. Qd2 Na5 11. Bb3 Nxb3 12. cxb3 d6 13. Bh6 Be6 14. 0-0 Nc6 15. f4 Bd7 16. f5 f6 17. fxg6 hxg6 18. Nd5 Ne7 19. Nc3 g5 20. Bxg7 Kxg7 21. Ne2 Ng6 22. Ng3 Rh8 23. Nf5+ Bxf5 24. exf5 Ne5 25. Qd5 c6 26. Qd2 d5 27. Rac1 Qb6+ 28. Kh1 Qc7 29. Rc3 Nc4 30. g3 Nxd2 31. Re1 Ne4 32. Rce3 Nxg3+ 33. Kg2 Nxf5 34. Rh3 Rxh3 35. Kxh3 Rh8+ 36. Kg4 Qf4# 0-1

[Event "Harburg-chH 13th"]
[Site "Hamburg"]
[Date "2018.08.03"]
[Round "1"]
[White "Nuernberg, Rainer"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1180"]
[BlackElo "1184"]
[PlyCount "65"]
[EventDate "2018.08.03"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "EXT 2019"]
[Source "ChessBase"]
[SourceDate "2018.10.10"]
[SourceVersion "1"]
[SourceVersionDate "2018.10.10"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 Nxd5 4. Nxd5 Qxd5 5. Nf3 Nc6 6. d4 Bg4 7. Be2 0-0-0 8. Be3 e6 9. c4 Qa5+ 10. Bd2 Bb4 11. h3 Bxf3 12. Bxf3 Rxd4 13. 0-0 Rxd2 14. Qc1 Qe5 15. a3 Bd6 16. g3 Rd4 17. Bxc6 Rh4 18. Bg2 Rd8 19. f4 Qd4+ 20. Kh2 Rh6 21. Rd1 Qf2 22. b4 Rf6 23. Rf1 Qd4 24. c5 Be7 25. Qc2 Rg6 26. Rad1 Qe3 27. Rf3 Rxd1 28. Qxd1 Qe4 29. Qa4 Kd8 30. Rf1 Qd3 31. Rd1 Rxg3 32. Rxd3+ Rxd3 33. Qxa7 1-0

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.07"]
[Round "7"]
[White "Detjen, Mattes"]
[Black "Shirjang, Amir"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "974"]
[PlyCount "67"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 c5 2. c3 Nc6 3. d4 b6 4. Nf3 f6 5. d5 Ne5 6. Bf4 d6 7. Bb5+ Bd7 8. Bxd7+ Qxd7 9. 0-0 Nxf3+ 10. Qxf3 e5 11. dxe6 Qxe6 12. Bg3 Rd8 13. Nd2 d5 14. exd5 Rxd5 15. Rfe1 Re5 16. Bxe5 fxe5 17. Qa8+ Kf7 18. Qxa7+ Be7 19. b3 Nf6 20. Nc4 Nd7 21. Rad1 Rd8 22. Re2 Ke8 23. Qa4 Kf8 24. Red2 Kg8 25. Rxd7 Rf8 26. Qa7 Qf7 27. f3 Qg6 28. Rxe7 Rxf3 29. Qb8+ Rf8 30. Qxe5 Qg4 31. Ne3 Qg6 32. Rd6 Qb1+ 33. Nd1 Qxa2 34. Qxg7# 1-0

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.06"]
[Round "5"]
[White "Detjen, Mattes"]
[Black "Gawollek, Hans"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "974"]
[BlackElo "1246"]
[PlyCount "66"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Nxd4 h6 5. Nc3 Nf6 6. Bf4 Bd7 7. a4 Nc6 8. Be2 Be7 9. 0-0 0-0 10. Bc4 Ne5 11. Bb3 a6 12. Nf3 Bg4 13. Bxe5 Bxf3 14. Qxf3 dxe5 15. Rad1 Bd6 16. Rfe1 Qe7 17. Qg3 Kh8 18. Nd5 Nxd5 19. Bxd5 c6 20. Bc4 Rad8 21. Qg4 Bc5 22. Rf1 Qf6 23. Rd3 Rxd3 24. cxd3 Bd4 25. b3 b5 26. axb5 axb5 27. Bxb5 cxb5 28. Kh1 Qb6 29. f3 Qc6 30. f4 exf4 31. Rxf4 Qc1+ 32. Qd1 Qxd1+ 33. Rf1 Qxf1# 0-1

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.06"]
[Round "6"]
[White "Fink, Anton"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1293"]
[BlackElo "974"]
[PlyCount "57"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 h6 6. Be3 Bb6 7. Qd2 d6 8. h3 Be6 9. Bb3 Qd7 10. 0-0 0-0-0 11. Bxb6 axb6 12. Rfe1 d5 13. exd5 Nxd5 14. Nxd5 Bxd5 15. Nxe5 Nxe5 16. Rxe5 Bc6 17. a4 Qd6 18. Ree1 Qg6 19. g3 Qh5 20. Kh2 Bd7 21. g4 Qg6 22. Qf4 f6 23. a5 bxa5 24. Rxa5 Be8 25. Be6+ Kb8 26. Rea1 b6 27. Ra8+ Kb7 28. Qf3+ Bc6 29. R1a7# 1-0

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.05"]
[Round "3"]
[White "Detjen, Mattes"]
[Black "Heiseke, Gerhard"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "974"]
[BlackElo "1196"]
[PlyCount "85"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Bg4 4. Nf3 Qxd5 5. Nc3 Bxf3 6. Nxd5 Bxd5 7. Bg5 Nbd7 8. Bxf6 Nxf6 9. Bb5+ c6 10. Ba4 Bxg2 11. Rg1 Bh3 12. Qf3 Bd7 13. 0-0-0 e6 14. Rge1 Be7 15. d5 Nxd5 16. Qg3 0-0 17. Rg1 Bf6 18. Bb3 a5 19. Rd3 a4 20. Bxd5 cxd5 21. Rf3 Bd4 22. c3 Rfc8 23. Kd1 Bxc3 24. bxc3 g6 25. Qd6 Rd8 26. Qe7 Be8 27. Qxb7 Rab8 28. Qc7 Rdc8 29. Qg3 Rb1+ 30. Kd2 Rb2+ 31. Kd3 Bb5+ 32. Kd4 Re2 33. Re3 Rd2+ 34. Ke5 Rxa2 35. Qf4 Rb2 36. Qh6 Rxf2 37. Rgg3 Rf5+ 38. Kd6 Rh5 39. Qf4 Rf5 40. Qh4 Rh5 41. Qxh5 Rc6+ 42. Ke7 Kg7 43. Qe5+ 1-0

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.05"]
[Round "4"]
[White "Humpe, Luca Julien"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C86"]
[WhiteElo "1329"]
[BlackElo "974"]
[PlyCount "45"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 Be7 6. c3 b5 7. Bb3 Na5 8. Bc2 c5 9. 0-0 d6 10. Rd1 0-0 11. d4 cxd4 12. cxd4 Bb7 13. dxe5 Ng4 14. h3 Nh6 15. Bf4 Nc4 16. b3 Nb6 17. Nc3 b4 18. Nd5 Bxd5 19. exd5 dxe5 20. Bxh6 gxh6 21. Qxe5 Bf6 22. Qf5 Bxa1 23. Qxh7# 1-0

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.04"]
[Round "1"]
[White "Detjen, Mattes"]
[Black "Santos, Felipe"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "974"]
[BlackElo "1316"]
[PlyCount "64"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 c6 5. Bc4 Nf6 6. Nf3 Bg4 7. h3 Bh5 8. g4 Bg6 9. Bd2 Qc7 10. Ne5 Nbd7 11. Nxg6 hxg6 12. Qe2 e6 13. 0-0-0 b5 14. Bb3 a5 15. a3 b4 16. axb4 axb4 17. Na2 Be7 18. Bxb4 Bxb4 19. Nxb4 Ra1+ 20. Kd2 Qf4+ 21. Ke1 Rxd1+ 22. Qxd1 Ne4 23. Nd3 Qf6 24. Qa1 0-0 25. h4 c5 26. g5 Qf3 27. Rf1 cxd4 28. Qa4 Ndc5 29. Qxd4 Nxb3 30. cxb3 Ra8 31. Ne5 Ra1+ 32. Qd1 Rxd1# 0-1

[Event "Niedersachsen-ch op C"]
[Site "Verden"]
[Date "2018.01.04"]
[Round "2"]
[White "Hornstein, Leonhard Orell"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1190"]
[BlackElo "974"]
[PlyCount "36"]
[EventDate "2018.01.04"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]

1. d4 d5 2. e3 e6 3. f4 Nf6 4. Nd2 Be7 5. c3 0-0 6. Bd3 b6 7. Ngf3 Bb7 8. Ne5 Nbd7 9. 0-0 c5 10. Qf3 Rc8 11. b3 Qc7 12. Bb2 c4 13. bxc4 dxc4 14. Ndxc4 Bxf3 15. Rxf3 Nxe5 16. fxe5 Ng4 17. Raf1 f6 18. exf6 Qxh2# 0-1

[Event "Harburg-chI 12th"]
[Site "Hamburg"]
[Date "2017.08.06"]
[Round "4"]
[White "Detjen, Mattes"]
[Black "Rennkamp, David"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "890"]
[BlackElo "1012"]
[PlyCount "82"]
[EventDate "2017.08.06"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 d6 5. Nc3 Bg4 6. h3 Bh5 7. g4 Bg6 8. Bd2 Nf6 9. Bg5 0-0 10. Nd5 h6 11. Nxf6+ gxf6 12. Be3 Bxe3 13. fxe3 h5 14. Rg1 Kh7 15. Qe2 Kh6 16. gxh5 Bxh5 17. Qg2 Rg8 18. Qf2 Qd7 19. 0-0-0 Qxh3 20. Rxg8 Rxg8 21. Rf1 Rg2 22. Qe1 Bxf3 23. Rh1 Rh2 24. Rxh2 Qxh2 25. Bxf7 Qh1 26. Qxh1+ Bxh1 27. Kd2 Kg7 28. Bd5 Kg6 29. a3 a5 30. c3 Kg5 31. b4 axb4 32. axb4 f5 33. b5 Nd8 34. Ke2 f4 35. exf4+ exf4 36. Kf2 Kg4 37. Ke2 Kg3 38. Bb3 f3+ 39. Kf1 Bg2+ 40. Ke1 f2+ 41. Ke2 f1Q+ 0-1

[Event "Harburg-chI 12th"]
[Site "Hamburg"]
[Date "2017.08.06"]
[Round "5"]
[White "Lohmann, Tristan"]
[Black "Detjen, Mattes"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "1010"]
[BlackElo "890"]
[PlyCount "85"]
[EventDate "2017.08.06"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 Nf6 5. Nc3 d6 6. Bg5 h6 7. Bh4 g5 8. Bg3 Be6 9. Bb3 Qd7 10. Qd2 0-0-0 11. 0-0-0 Bg4 12. Qe2 Nd4 13. Ba4 Nc6 14. h3 Bxf3 15. Qxf3 Nh7 16. Nd5 Nd4 17. Bxd7+ Rxd7 18. Qg4 Kd8 19. c3 Nc6 20. Qe2 Ne7 21. Nxe7 Rxe7 22. f3 Rhe8 23. Bf2 Bxf2 24. Qxf2 b6 25. d4 exd4 26. Rxd4 Nf6 27. h4 g4 28. fxg4 Nxg4 29. Qf4 Nf6 30. Qxh6 Nxe4 31. Qf4 Nc5 32. Qg3 Ne4 33. Qg7 Nc5 34. Rdd1 Ne6 35. Qg3 Nc5 36. Rde1 Rxe1+ 37. Rxe1 Rxe1+ 38. Qxe1 Nd3+ 39. Kd2 Nxe1 40. Kxe1 Ke7 41. Kf2 Kf6 42. Kf3 c5 43. h5 1/2-1/2

[Event "Harburg-chI 12th"]
[Site "Hamburg"]
[Date "2017.08.05"]
[Round "3"]
[White "Detjen, Mattes"]
[Black "Lohmann, Rene Alexander"]
[Result "1/2-1/2"]
[ECO "B02"]
[WhiteElo "890"]
[BlackElo "940"]
[PlyCount "66"]
[EventDate "2017.08.06"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. Nc3 c6 4. dxc6 Nxc6 5. Bc4 Bg4 6. Nf3 e5 7. d3 Bb4 8. Bd2 0-0 9. h3 Bf5 10. Qe2 Re8 11. 0-0-0 Nd4 12. Qf1 Nxf3 13. gxf3 Bd7 14. Bg5 Be7 15. Rg1 Rc8 16. Bh6 g6 17. Qg2 a6 18. Rde1 b5 19. Bb3 Qc7 20. Qh2 Bd6 21. Qg2 Be6 22. Qg5 Nh5 23. Qxh5 Bxb3 24. axb3 b4 25. Qh4 Re6 26. Rg4 bxc3 27. Rc4 cxb2+ 28. Kxb2 Qd7 29. Rxc8+ Qxc8 30. d4 Be7 31. Qg4 Bf6 32. d5 e4+ 33. Kc1 Re8 1/2-1/2

[Event "Harburg-chI 12th"]
[Site "Hamburg"]
[Date "2017.08.05"]
[Round "2"]
[White "Niemann, Marcel"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C68"]
[WhiteElo "1119"]
[BlackElo "890"]
[PlyCount "63"]
[EventDate "2017.08.06"]
[EventType "tourn"]
[EventRounds "5"]
[EventCountry "GER"]
[SourceTitle "CBM 180 Extra"]
[Source "ChessBase"]
[SourceDate "2017.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2017.10.06"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 f6 6. Nc3 Bg4 7. h3 Bh5 8. d3 Bc5 9. Re1 Qd7 10. Be3 Bb6 11. Bxb6 cxb6 12. Re3 Ne7 13. Ne2 0-0 14. c3 Rad8 15. Qb3+ Kh8 16. Qxb6 Rb8 17. d4 exd4 18. Qxd4 Qe8 19. Qb4 Qd8 20. Ned4 Bf7 21. Ree1 Qd7 22. Rad1 Qc7 23. c4 c5 24. Qa4 cxd4 25. Rxd4 Be8 26. Qa3 Bf7 27. b3 Ra8 28. Red1 b5 29. Rd7 Qb8 30. Qxe7 bxc4 31. bxc4 Bxc4 32. Qxg7# 1-0

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.08"]
[Round "7"]
[White "Nagel, Philipp"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1086"]
[BlackElo "810"]
[PlyCount "31"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. d4 d5 2. Nc3 c5 3. Nf3 Nf6 4. e3 e6 5. Bb5+ Bd7 6. Qe2 Bd6 7. b3 cxd4 8. exd4 Bxb5 9. Nxb5 0-0 10. 0-0 Ne4 11. Ne5 Qf6 12. Nxd6 Qh6 13. Bxh6 gxh6 14. Qg4+ Kh8 15. Ndxf7+ Rxf7 16. Nxf7# 1-0

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.07"]
[Round "6"]
[White "Detjen, Mattes"]
[Black "Aden, Keno"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "810"]
[PlyCount "54"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 g6 4. Ng5 h6 5. Nxf7 Qf6 6. Nxh8 Bc5 7. 0-0 d6 8. Bxg8 Be6 9. Bxe6 Qxe6 10. Qf3 0-0-0 11. Nf7 Rf8 12. d3 Rxf7 13. Qh3 Rf6 14. Qxh6 Bxf2+ 15. Rxf2 Rxf2 16. Kxf2 Qf6+ 17. Kg1 Nd4 18. Bg5 Qe6 19. Qf8+ Kd7 20. Qd8+ Kc6 21. a4 Qd7 22. b4 Ne6 23. b5+ Kb6 24. Qxd7 Nxg5 25. a5+ Kc5 26. Qxc7+ Kd4 27. Kf2 Nxe4+ 1-0

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.07"]
[Round "5"]
[White "Reimer, Philip"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1110"]
[BlackElo "810"]
[PlyCount "95"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nc3 Bc5 4. Bc4 Nc6 5. d3 d6 6. h3 h6 7. Be3 0-0 8. Bxc5 dxc5 9. Qd2 Qe7 10. g4 Be6 11. Bb3 Bxb3 12. axb3 Nd4 13. Nxd4 cxd4 14. Ne2 h5 15. gxh5 Nxh5 16. Rg1 Nf4 17. Nxf4 exf4 18. Qxf4 Qd6 19. Qg4 Qg6 20. 0-0-0 Qxg4 21. Rxg4 f5 22. exf5 Rxf5 23. Rxd4 Rxf2 24. Rd2 Rf1+ 25. Rd1 Raf8 26. Re4 Rxd1+ 27. Kxd1 Rf1+ 28. Kd2 Rh1 29. Re3 Rh2+ 30. Kc3 c5 31. Re7 b5 32. b4 cxb4+ 33. Kxb4 Rxc2 34. Kxb5 Rxb2+ 35. Kc4 Rh2 36. Rxa7 Rxh3 37. d4 g5 38. d5 Rh6 39. Kc5 g4 40. d6 Rh3 41. d7 Rd3 42. Ra8+ Kg7 43. d8Q Rxd8 44. Rxd8 g3 45. Rd2 Kf6 46. Rg2 Ke5 47. Rxg3 Ke4 48. Rg5 1-0

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.06"]
[Round "4"]
[White "Detjen, Mattes"]
[Black "Toepsch, Arne"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "810"]
[BlackElo "1086"]
[PlyCount "62"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Ng5 Qxg5 5. d4 Qxg2 6. Rf1 Qxe4+ 7. Be3 Nxd4 8. Nc3 Qxc2 9. Qxc2 Nxc2+ 10. Ke2 Bxe3 11. fxe3 Nxa1 12. Bxf7+ Kd8 13. Bh5 Nf6 14. Rxa1 Nxh5 15. Nd5 d6 16. Rf1 Be6 17. Nb4 Ke7 18. e4 Rhf8 19. Rg1 Nf4+ 20. Kf3 Nh3+ 21. Kg2 Nxg1 22. Kxg1 Rf4 23. Nd3 Rxe4 24. Nf2 Re1+ 25. Kg2 Bd5+ 26. Kg3 Rg1+ 27. Kh4 Rf8 28. Ng4 Rf4 29. a3 Rfxg4+ 30. Kh3 Be6 31. b4 Rxb4# 0-1

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.06"]
[Round "3"]
[White "Regel, Erik"]
[Black "Detjen, Mattes"]
[Result "0-1"]
[ECO "C55"]
[BlackElo "810"]
[PlyCount "80"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bc4 Bc5 5. h3 h6 6. 0-0 d6 7. d4 exd4 8. Re1 dxc3 9. bxc3 0-0 10. Bb5 Qe8 11. e5 dxe5 12. Bxc6 bxc6 13. Nxe5 Qe6 14. Nxc6 Qf5 15. Ne7+ Bxe7 16. Rxe7 Qc5 17. Re1 Qc6 18. Qf3 Qxf3 19. gxf3 Bxh3 20. Re7 Rac8 21. Kh2 Rfe8 22. Rd7 Nxd7 23. Kxh3 Re2 24. Kg2 Rxc2 25. Be3 Rxc3 26. Bd2 Rd3 27. Be3 Ne5 28. a4 Rcd8 29. Re1 Rd1 30. Kf1 Rxe1+ 31. Kxe1 Nxf3+ 32. Ke2 Ne5 33. Bf4 Rd5 34. Ke3 c5 35. Ke4 Rd8 36. Kxe5 c4 37. a5 c3 38. a6 c2 39. f3 Rc8 40. Bc1 h5 0-1

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.05"]
[Round "2"]
[White "Detjen, Mattes"]
[Black "Alhamid, Mohamad"]
[Result "0-1"]
[ECO "C42"]
[WhiteElo "810"]
[BlackElo "1108"]
[PlyCount "56"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 Qe7 4. d4 d6 5. Nf3 Nxe4 6. Bd3 Nc3+ 7. Qe2 Nxe2 8. Bxe2 Bg4 9. Be3 Nc6 10. h3 Nxd4 11. Bxd4 c5 12. Bc3 Bxf3 13. gxf3 a6 14. Rg1 b5 15. Bxg7 Bxg7 16. Rxg7 Qf6 17. Rg4 Qxb2 18. Nc3 Qxc3+ 19. Kf1 Qxa1+ 20. Kg2 Qxa2 21. Re4+ Kd7 22. c3 Rae8 23. Rxe8 Rxe8 24. Bd3 Rg8+ 25. Kf1 Qa1+ 26. Ke2 Rg1 27. Ke3 Qxc3 28. Ke4 Qe5# 0-1

[Event "Niedersachsen-ch op-D"]
[Site "Verden"]
[Date "2017.01.05"]
[Round "1"]
[White "Schieble, Johannes"]
[Black "Detjen, Mattes"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1197"]
[BlackElo "810"]
[PlyCount "75"]
[EventDate "2017.01.05"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "CBM 187 Extra"]
[Source "ChessBase"]
[SourceDate "2018.11.04"]
[SourceVersion "1"]
[SourceVersionDate "2018.11.04"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 Ng4 6. 0-0 Nxf2 7. Rxf2 Bxf2+ 8. Kxf2 0-0 9. Bg5 Qe8 10. Nh4 h6 11. Be3 d6 12. Ng6 Bg4 13. Qxg4 Qc8 14. Qxc8 Raxc8 15. Nxf8 Kxf8 16. Rf1 a6 17. Ke2 f6 18. Bd5 Nb4 19. Kd2 Nxa2 20. Nxa2 c6 21. Bc4 b5 22. Be6 Re8 23. Bd7 Rd8 24. Bxc6 Rc8 25. Bb7 Rb8 26. Bxa6 Kf7 27. Nb4 Ke6 28. Nc6 Ra8 29. Bxb5 Rc8 30. Rb1 Kd7 31. Na7+ Kc7 32. Nxc8 Kxc8 33. b4 Kd8 34. Bc6 Kc7 35. b5 Kb8 36. b6 g6 37. Ra1 Kc8 38. Ra8# 1-0

