| Apr 3, 2026 | Meuser | ½–½ | Foerthmann | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Sicilian Defense: Old Sicilian | |
| Apr 2, 2026 | Foerthmann | ½–½ | Baklan | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Zukertort Opening: Quiet System | |
| Apr 1, 2026 | Kowalczik | ½–½ | Foerthmann | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Caro-Kann Defense: Accelerated Panov Attack | |
| Apr 1, 2026 | Foerthmann | * | Janulis | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Mar 31, 2026 | Margaryan | 0–1 | Foerthmann | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Queen's Gambit Declined | |
| Mar 30, 2026 | Foerthmann | ½–½ | Lueders Vega | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Réti Opening: Advance Variation | |
| Mar 30, 2026 | Debus | 0–1 | Foerthmann | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | English Opening: Symmetrical Variation | |
| Mar 29, 2026 | Foerthmann | 0–1 | Nguyen | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | Semi-Slav Defense: Normal Variation | |
| Mar 28, 2026 | Bundan | 1–0 | Foerthmann | Landesjugendeinzelmeisterschaft in Niedersachsen U14 | King's Indian Defense: Fianchetto Variation, Yugoslav Variation | |
| Oct 25, 2025 | Foerthmann | 0–1 | Krneta | Runde 7: Foerthmann, Jasper - Krneta, Slavko | English Opening: Symmetrical Variation, Fianchetto Variation | |
| Oct 25, 2025 | Foerthmann | 1–0 | Schmorr | Runde 6: Foerthmann, Jasper - Schmorr, Daniel | Queen's Pawn Game: London System | |
| Oct 25, 2025 | Rudolph | 1–0 | Foerthmann | Runde 5: Rudolph, Max - Foerthmann, Jasper | Sicilian Defense: Snyder Variation | |
| Oct 24, 2025 | Meschke | 1–0 | Foerthmann | Runde 4: Meschke, Oliver - Foerthmann, Jasper | Lion Defense: Anti-Philidor, Lion's Cave | |
| Oct 24, 2025 | Foerthmann | 1–0 | Klaus Schulz | Runde 3: Foerthmann, Jasper - Klaus Schulz | English Opening: Agincourt Defense | |
| Oct 23, 2025 | Julian Schrieber | 0–1 | Foerthmann | Runde 2: Julian Schrieber - Foerthmann, Jasper | Rapport-Jobava System | |
| Oct 23, 2025 | Foerthmann | 0–1 | Ulrich Schmidt | Runde 1: Foerthmann, Jasper - Ulrich Schmidt | English Opening: Caro-Kann Defensive System | |
| — | Foerthmann | 1–0 | Hoffmann | Round 1: Foerthmann, Jasper - Hoffmann, Edgar | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| — | Foerthmann | 1–0 | Kampe | Round 3: Foerthmann, Jasper - Kampe, Leon | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| — | Foerthmann | ½–½ | Lehner | Round 5: Foerthmann, Jasper - Lehner, Hendrik Elias | English Opening: Anglo-Indian Defense, Hedgehog System | |
| — | Foerthmann | ½–½ | Oita-Dragota | Round 7: Foerthmann, Jasper - Oita-Dragota, Alexandru-Teodor | English Opening: King's English Variation | |
| — | Stopp | 1–0 | Foerthmann | Round 2: Stopp, Bruno - Foerthmann, Jasper | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| — | Osmers | 1–0 | Foerthmann | Round 4: Osmers, Julian - Foerthmann, Jasper | Sicilian Defense: Alapin Variation | |
| — | Glaschak | 0–1 | Foerthmann | Round 6: Glaschak, Joachim - Foerthmann, Jasper | Indian Defense | |
