28 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Detjen, Mattes | Miller, Elias | 0-1 | C02 | DEM U14 2022 | 2022-06-11 |
| Detjen, Mattes | Vihan, Shourya | 0-1 | B22 | DEM U14 2022 | 2022-06-09 |
| Detjen, Mattes | Uhlmann, Tim | 0-1 | C45 | DEM U14 2022 | 2022-06-07 |
| Detjen, Mattes | Bräutigam, Alexander | * | B22 | DEM U14 2022 | 2022-06-05 |
| Detjen, Mattes | Meusel, Theodor | 0-1 | C02 | DVM U12 2021 | 2022-03-27 |
| Detjen, Mattes | Schäfle, Moritz | 1/2-1/2 | B13 | DVM U12 2021 | 2022-03-26 |
| Detjen, Mattes | Mündörfer, Sebastian | 1-0 | B27 | DEM U12 2021 | 2021-08-28 |
| Detjen, Mattes | Ehses, Julius | 1-0 | C42 | DEM U12 2021 | 2021-08-27 |
| Detjen, Mattes | Rückel, Felix | 1-0 | C45 | DEM U12 2021 | 2021-08-26 |
| Detjen, Mattes | Jumah, Shayan | 1/2-1/2 | C02 | DEM U12 2021 | 2021-08-24 |
| Detjen, Mattes | Schuricht, Emil Frederick | 0-1 | B13 | DEM U12 2021 | 2021-08-23 |
| Mattes Detjen | Benedikt Schreiber | 0-1 | B22 | U12 - Runde 7: Mattes Detjen - Benedikt Schreiber | 2021-08-08 |
| Mattes Detjen | Henrik Puchas | 0-1 | C45 | U12 - Runde 5: Mattes Detjen - Henrik Puchas | 2021-08-07 |
| Mattes Detjen | Linus Apel | 0-1 | C45 | U12 - Runde 1: Mattes Detjen - Linus Apel | 2021-08-05 |