| Jul 25, 2025 | Guillaume | ½–½ | Cordes | Biel Chess Festival 2025 WT 2 | Sicilian Defense: French Variation, Normal | |
| Jul 24, 2025 | Cordes | ½–½ | Moser | Biel Chess Festival 2025 WT 2 | Slav Defense: Exchange Variation | |
| Jul 23, 2025 | Cordes | ½–½ | Gottofrey | Biel Chess Festival 2025 WT 2 | Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation | |
| Jul 22, 2025 | Paricharak | 1–0 | Cordes | Biel Chess Festival 2025 WT 2 | Zukertort Opening: Sicilian Invitation | |
| Jul 21, 2025 | Bik | 1–0 | Cordes | Biel Chess Festival 2025 WT 2 | Hungarian Opening: Slav Formation | |
| Jul 13, 2025 | Cordes | ½–½ | Dobierzin | Round 7: Cordes, Lothar - Dobierzin, Olaf | King's Indian Defense: Orthodox Variation | |
| Jul 12, 2025 | Lehr | 1–0 | Cordes | Round 6: Lehr, Thomas - Cordes, Lothar | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jul 11, 2025 | Cordes | ½–½ | McAndrew | Round 5: Cordes, Lothar - McAndrew, Robert | Pseudo Queen's Indian Defense | |
| Jul 10, 2025 | Waltenberger | ½–½ | Cordes | Round 4: Waltenberger, Udo - Cordes, Lothar | English Opening: Symmetrical Variation, Mecking Variation | |
| Jul 9, 2025 | Cordes | ½–½ | Krueger | Round 3: Cordes, Lothar - Krueger, Wolfgang | King's Indian Defense: Orthodox Variation | |
| Jul 8, 2025 | Kolthoff | 0–1 | Cordes | Round 2: Kolthoff, Siegmund - Cordes, Lothar | English Opening: Symmetrical Variation, Full Symmetry Line | |
| Jul 7, 2024 | Kolthoff | 1–0 | Cordes | Round 7: Kolthoff, Siegmund - Cordes, Lothar | Catalan Opening | |
| Jul 6, 2024 | Cordes | ½–½ | Klettke | Round 6: Cordes, Lothar - Klettke, Wolfgang | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jul 5, 2024 | Ruether | ½–½ | Cordes | Round 5: Ruether, Rudolf - Cordes, Lothar | Queen's Indian Defense: Euwe Variation | |
| Jul 4, 2024 | Cordes | 1–0 | Onasch | Round 4: Cordes, Lothar - Onasch, Gunnar | Queen's Gambit Declined: Tartakower Defense | |
| Jul 3, 2024 | Barten | 0–1 | Cordes | Round 3: Barten, Ralf - Cordes, Lothar | Slav Defense: Three Knights Variation | |
| Jul 1, 2024 | Krueger | ½–½ | Cordes | Round 1: Krueger, Erich - Cordes, Lothar | Petrov's Defense: Three Knights Game | |
| Jul 19, 2023 | Liu | 1–0 | Cordes | Biel International Chess Festival - Amateur Tournament | Queen's Indian Defense | |
