| Nov 23, 2025 | Klug | 1–0 | Osthus | Round 9: Klug, Thomas Sebastian - Osthus, Jannis | Caro-Kann Defense: Classical Variation | |
| Nov 23, 2025 | Osthus | 0–1 | Ferchel | Round 8: Osthus, Jannis - Ferchel, Leo | Queen's Pawn Game: Torre Attack | |
| Nov 23, 2025 | Fung | 1–0 | Osthus | Round 7: Fung, Oliver Yat-Sing - Osthus, Jannis | Slav Defense: Modern Line | |
| Nov 23, 2025 | Osthus | 0–1 | Gundogdu | Round 6: Osthus, Jannis - Gundogdu, Cem | Polish Opening: King's Indian Variation | |
| Nov 23, 2025 | Pidkuyko | 1–0 | Osthus | Round 5: Pidkuyko, Anna - Osthus, Jannis | Caro-Kann Defense | |
| Nov 23, 2025 | Osthus | 0–1 | Tupac Yupanqui Herrera | Round 4: Osthus, Jannis - Tupac Yupanqui Herrera, Daniel | Sicilian Defense: French Variation | |
| Nov 23, 2025 | Ucar | 1–0 | Osthus | Round 3: Ucar, Eren - Osthus, Jannis | English Opening: King's English Variation | |
| Nov 23, 2025 | Osthus | 1–0 | Tsopanopoulos | Round 2: Osthus, Jannis - Tsopanopoulos, Michael | Polish Opening | |
| Nov 23, 2025 | Cwiek | 1–0 | Osthus | Round 1: Cwiek, Ryszard - Osthus, Jannis | Zukertort Opening | |
| Nov 22, 2025 | Osthus | 0–1 | Kropp | Round 9: Osthus, Jannis - Kropp, Kevin | Zukertort Opening: Nimzo-Larsen Variation | |
| Nov 22, 2025 | Montag | 1–0 | Osthus | Round 8: Montag, Jan - Osthus, Jannis | Old Indian Defense | |
| Nov 22, 2025 | Osthus | 0–1 | Napiontek | Round 7: Osthus, Jannis - Napiontek, Moritz | Zukertort Opening: Dutch Variation | |
| Nov 22, 2025 | Abed | 1–0 | Osthus | Round 6: Abed, Rashid - Osthus, Jannis | Lion Defense: Anti-Philidor, Lion's Cave | |
| Nov 22, 2025 | Osthus | 1–0 | Aheen Rahman | Round 5: Osthus, Jannis - Aheen Rahman | Nimzo-Larsen Attack: Classical Variation | |
| Nov 22, 2025 | Rocklage | 1–0 | Osthus | Round 4: Rocklage, Jeromin - Osthus, Jannis | English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation | |
| Nov 22, 2025 | Osthus | 1–0 | Li | Round 3: Osthus, Jannis - Li, Ding | Nimzo-Larsen Attack: Classical Variation | |
| Nov 22, 2025 | Trunce | 1–0 | Osthus | Round 2: Trunce, Eimantas - Osthus, Jannis | Pirc Defense | |
| Nov 22, 2025 | Osthus | 0–1 | Brunner | Round 1: Osthus, Jannis - Brunner, Tobias | Nimzo-Larsen Attack: Classical Variation | |
