| Jan 5, 2026 | Yi | 0–1 | Klages | Runde 7: Yi, Sirius - Klages, Justus | Sicilian Defense: French Variation | |
| Jan 4, 2026 | Klages | 1–0 | Lambrecht | Runde 6: Klages, Justus - Lambrecht, Harald | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jan 4, 2026 | Klages | 1–0 | Boehm | Runde 5: Klages, Justus - Boehm, Viviane-Justine | French Defense: Advance Variation, Main Line | |
| Jan 3, 2026 | Feldkaemper | 1–0 | Klages | Runde 4: Feldkaemper, Andreas - Klages, Justus | Queen's Gambit Declined: Barmen Variation | |
| Jan 3, 2026 | Kuipers | 1–0 | Klages | Runde 3: Kuipers, Hartmut, Dr. - Klages, Justus | Queen's Gambit Declined: Manhattan Variation | |
| Jan 2, 2026 | Klages | 1–0 | Monir Issa | Runde 2: Klages, Justus - Monir Issa | Scotch Game: Malaniuk Variation | |
| Jan 2, 2026 | Leppin | 1–0 | Klages | Runde 1: Leppin, Mattis - Klages, Justus | Queen's Pawn Game: Accelerated London System | |
| Dec 30, 2025 | Klages | 0–1 | Tolle | DVM U12 2025 | French Defense: Exchange Variation | |
| Dec 29, 2025 | Tadic | 1–0 | Klages | DVM U12 2025 | Sicilian Defense: Taimanov Variation | |
| Dec 29, 2025 | Hoang Xuan | 1–0 | Klages | DVM U12 2025 | Sicilian Defense: Taimanov Variation | |
| Dec 28, 2025 | Klages | 0–1 | Pranit Gupta | DVM U12 2025 | Scotch Game: Schmidt Variation | |
| Dec 28, 2025 | Mayer | 1–0 | Klages | DVM U12 2025 | Queen's Pawn Game: London System | |
| Dec 27, 2025 | Klages | 0–1 | Kandora | DVM U12 2025 | Scotch Game: Classical Variation | |
| Dec 27, 2025 | Gerhardt | 1–0 | Klages | DVM U12 2025 | Sicilian Defense: Alapin Variation | |
| Nov 1, 2025 | Klages | 0–1 | Noennig | Runde 7: Klages, Justus - Noennig, Nina | Scotch Game: Schmidt Variation | |
| Nov 1, 2025 | Freese | 1–0 | Klages | Runde 6: Freese, Hermann - Klages, Justus | Queen's Pawn Game: Chigorin Variation | |
| Nov 1, 2025 | Klages | 1–0 | Hornig | Runde 5: Klages, Justus - Hornig, Tom | Sicilian Defense: Old Sicilian | |
| Oct 31, 2025 | Klawun-Schulze | 1–0 | Klages | Runde 4: Klawun-Schulze, Stefanie - Klages, Justus | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Oct 31, 2025 | Klages | 0–1 | Bischop | Runde 3: Klages, Justus - Bischop, Dirk | French Defense: Advance Variation, Paulsen Attack | |
| Oct 30, 2025 | Ebeling | 1–0 | Klages | Runde 2: Ebeling, Hans-Juergen - Klages, Justus | French Defense: Franco-Sicilian Defense | |
| Jan 5, 2025 | Lambrecht | 0–1 | Klages | Round 7: Lambrecht, Harald - Klages, Justus | Zukertort Opening: Sicilian Invitation | |
| Jan 4, 2025 | Klages | 1–0 | Ueltzen | Round 6: Klages, Justus - Ueltzen, Horst | Scandinavian Defense | |
| Jan 4, 2025 | Claudia Rottmann | 0–1 | Klages | Round 5: Claudia Rottmann - Klages, Justus | Sicilian Defense: French Variation | |
| Jan 3, 2025 | Klages | 0–1 | Feldkaemper | Round 4: Klages, Justus - Feldkaemper, Andreas | Italian Game: Paris Defense | |
| Jan 3, 2025 | Wilting | 1–0 | Klages | Round 3: Wilting, Oskar - Klages, Justus | Rapport-Jobava System | |
| Jan 2, 2025 | Klages | 1–0 | Viviane-Justine Boehm | Round 2: Klages, Justus - Viviane-Justine Boehm | Pirc Defense | |
| Jan 2, 2025 | Cramer | 1–0 | Klages | Round 1: Cramer, Timon - Klages, Justus | Sicilian Defense: Alapin Variation | |
| Dec 28, 2024 | Klages | 0–1 | Pohlmann | DVM U10 2024 | French Defense: Advance Variation | |
| Dec 27, 2024 | Mätz | 0–1 | Klages | DVM U10 2024 | Sicilian Defense: French Variation | |
| Nov 17, 2024 | Klages | 0–1 | Rexhausen | Round 4: Klages, Justus - Rexhausen, Mika | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Nov 17, 2024 | Cierpka | 0–1 | Klages | Round 5: Cierpka, Daniel - Klages, Justus | Queen's Pawn Game | |
| Nov 16, 2024 | Klages | 0–1 | Sammann | Round 3: Klages, Justus - Sammann, Anton | Sicilian Defense: Smith-Morra Gambit Declined, Center Formation | |
| Nov 16, 2024 | Timo Felis | 1–0 | Klages | Round 2: Timo Felis - Klages, Justus | Sicilian Defense: Kan Variation, Knight Variation | |
| Nov 15, 2024 | Klages | 1–0 | Wilting | Round 1: Klages, Justus - Wilting, Oskar | Sicilian Defense: Alapin Variation, Sherzer Variation | |
| Jan 5, 2023 | Schwenker | * | Klages | Lower Saxony Championship | C | ? | |