| Jul 20, 2025 | Mebarek | 0–1 | Clausen | Biel Chess Festival 2025 Blitz | Indian Defense | |
| Jul 20, 2025 | Clausen | 0–1 | Anetov | Biel Chess Festival 2025 Blitz | Italian Game: Two Knights Defense, Perreux Variation | |
| Jul 20, 2025 | Muheim | 1–0 | Clausen | Biel Chess Festival 2025 Blitz | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jul 20, 2025 | Clausen | ½–½ | Lutonins | Biel Chess Festival 2025 Blitz | Scotch Game: Scotch Gambit, Sarratt Variation | |
| Jul 20, 2025 | Jens | 1–0 | Clausen | Biel Chess Festival 2025 Blitz | Scandinavian Defense: Blackburne Gambit | |
| Jul 20, 2025 | Clausen | 1–0 | Phung | Biel Chess Festival 2025 Blitz | Sicilian Defense: Mengarini Variation | |
| Jul 20, 2025 | Hematyar | 0–1 | Clausen | Biel Chess Festival 2025 Blitz | Van Geet Opening | |
| Jul 20, 2025 | Clausen | 1–0 | Schneggenburger | Biel Chess Festival 2025 Blitz | Sicilian Defense: Mengarini Variation | |
| Jul 20, 2025 | Zumbrunn | 1–0 | Clausen | Biel Chess Festival 2025 Blitz | Scandinavian Defense: Blackburne Gambit | |
| Jul 20, 2025 | Clausen | 1–0 | Miranda | Biel Chess Festival 2025 Blitz | Sicilian Defense: Mengarini Variation | |
| Jul 20, 2025 | Aryan Goyal | 1–0 | Clausen | Biel Chess Festival 2025 Blitz | English Opening: Symmetrical Variation | |
| Jul 20, 2025 | Clausen | 1–0 | Karthik | Biel Chess Festival 2025 Blitz | Sicilian Defense: Mengarini Variation | |
| Jul 20, 2025 | Cruciani | 0–1 | Clausen | Biel Chess Festival 2025 Blitz | Benko Gambit Accepted: Modern Variation | |
| Jul 21, 2024 | Clausen | 0–1 | Nesterov | Biel Chess Festival BTZ | Caro-Kann Defense: von Hennig Gambit | |
| Jul 21, 2024 | Clausen | 0–1 | Macovei | Biel Chess Festival BTZ | Caro-Kann Defense: von Hennig Gambit | |
| Jul 21, 2024 | Clausen | 0–1 | Peycheva | Biel Chess Festival BTZ | Caro-Kann Defense: von Hennig Gambit | |
| Jul 21, 2024 | Clausen | 0–1 | Fejzullahu | Biel Chess Festival BTZ | French Defense: Advance Variation, Milner-Barry Gambit, Main Line | |
| Jul 21, 2024 | Clausen | 1–0 | Jordan | Biel Chess Festival BTZ | Caro-Kann Defense: von Hennig Gambit | |
| Jul 21, 2024 | Clausen | ½–½ | Padmini | Biel Chess Festival BTZ | Sicilian Defense: Mengarini Variation | |
| Jul 21, 2024 | Clausen | 0–1 | Haimovich | Biel Chess Festival BTZ | Sicilian Defense: Mengarini Variation | |
| Jul 21, 2024 | Yu | 0–1 | Clausen | Biel Chess Festival BTZ | Scandinavian Defense: Blackburne Gambit | |
| Jul 21, 2024 | Kaletsch | 0–1 | Clausen | Biel Chess Festival BTZ | Indian Defense | |
| Jul 21, 2024 | Nolting | 0–1 | Clausen | Biel Chess Festival BTZ | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jul 21, 2024 | Borisyuk | ½–½ | Clausen | Biel Chess Festival BTZ | Scandinavian Defense: Blackburne-Kloosterboer Gambit | |
| Jul 21, 2024 | Noh | 0–1 | Clausen | Biel Chess Festival BTZ | Caro-Kann Defense: Exchange Variation | |
| Jul 21, 2024 | Kappeler | 1–0 | Clausen | Biel Chess Festival BTZ | Benko Gambit Accepted: Dlugy Variation | |
| Nov 23, 2024 | Clausen | 1–0 | Kirk | Round 7: Clausen, Martin - Kirk, Eden | Sicilian Defense: Mengarini Variation | |
| Nov 23, 2024 | Clausen | 0–1 | Kyrkjebo | Round 9: Clausen, Martin - Kyrkjebo, Hanna B. | Italian Game: Two Knights Defense, Perreux Variation | |
| Nov 23, 2024 | Sigeman | ½–½ | Clausen | Round 5: Sigeman, Johan - Clausen, Martin | English Opening: Symmetrical Variation, Mecking Variation | |
