40 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Jahn, Gustav | Zander, Vincent | 1/2-1/2 | E00 | DEM U14 2026 | 2026-05-29 |
| Jahn, Gustav | Fischermann, Simon | 1/2-1/2 | C88 | DEM U14 2026 | 2026-05-27 |
| Jahn, Gustav | Schulz, Robin | 1-0 | B10 | DEM U14 2026 | 2026-05-26 |
| Jahn, Gustav | Prashanthakumar, Arnesh | 1-0 | E08 | DEM U14 2026 | 2026-05-24 |
| Jahn, Gustav | Zhao, Yunsheng | 1-0 | C78 | DVM U14 2025 | 2025-12-30 |
| Jahn, Gustav | Ensslen, Jakob | 1-0 | E06 | DVM U14 2025 | 2025-12-28 |
| Jahn, Gustav | Zhang, Onno | 0-1 | B90 | DVM U14 2025 | 2025-12-28 |
| Jahn, Gustav | Meitzner, Johan Eduard | 1-0 | B48 | DVM U14 2025 | 2025-12-27 |
| Jahn, Gustav | Schroeder, Hannes Artur | 0-1 | C54 | DEM U14 2025 | 2025-06-14 |
| Jahn, Gustav | Vakeel, Eshwar | 1-0 | B10 | DEM U14 2025 | 2025-06-12 |
| Jahn, Gustav | Fritzsche, David | 0-1 | B15 | DEM U14 2025 | 2025-06-11 |
| Jahn, Gustav | Stephanblome, Felix | 0-1 | C54 | DEM U14 2025 | 2025-06-09 |
| Jahn, Gustav | Nemitz, Alfred | 0-1 | C54 | DEM U14 2025 | 2025-06-06 |
| Jahn, Gustav | Vu Hoang Bach | 1-0 | A05 | DVM U12 2024 | 2024-12-29 |
| Jahn, Gustav | Tu, Audrey | 0-1 | C54 | DVM U12 2024 | 2024-12-28 |
| Jahn, Gustav | Sriram, Aumkar | 1-0 | B30 | DVM U12 2024 | 2024-12-27 |
| Jahn, Gustav | Vartanian, Roman | 0-1 | B38 | DEM U12 2024 | 2024-05-25 |
| Jahn, Gustav | Schmidt, Jossip | 1-0 | B76 | DEM U12 2024 | 2024-05-23 |
| Jahn, Gustav | Wettstein, Levin | 0-1 | C54 | DEM U12 2024 | 2024-05-22 |
| Jahn, Gustav | Prashanthakumar, Arnesh | 1-0 | C54 | DEM U12 2024 | 2024-05-19 |