| Jul 19, 2026 | Delion | 1–0 | Schaefer | Round 6: Delion, Helge - Schaefer, Gion | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jul 19, 2026 | Schaefer | 0–1 | Dietiker | Round 3: Schaefer, Gion - Dietiker, Manuel | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jul 19, 2026 | Schaefer | 0–1 | Fernandes Barbosa Dos Santos | Round 1: Schaefer, Gion - Fernandes Barbosa Dos Santos, Gabriel | Sicilian Defense: Dragon Variation, Classical Variation | |
| Jul 11, 2026 | Alrefae | 1–0 | Schaefer | Round 6: Alrefae, Ahmad - Schaefer, Gion | ? | |
| Jul 11, 2026 | Schaefer | 0–1 | Tcheau | Round 5: Schaefer, Gion - Tcheau, Alain | ? | |
| Jul 11, 2026 | Hardt | 0–1 | Schaefer | Round 4: Hardt, Winfried - Schaefer, Gion | ? | |
| Jul 11, 2026 | Schaefer | 0–1 | Musaelyan | Round 3: Schaefer, Gion - Musaelyan, Arshavir | ? | |
| Jul 11, 2026 | Rohde | 0–1 | Schaefer | Round 2: Rohde, Bernhard - Schaefer, Gion | ? | |
| Jul 11, 2026 | Schaefer | 0–1 | Bieri | Round 1: Schaefer, Gion - Bieri, Hanspeter | ? | |
| Jul 24, 2025 | Zimmermann | 0–1 | Schaefer | Biel Chess Festival 2025 | Sicilian Defense | |
| Jul 23, 2025 | Schaefer | 1–0 | Harte | Biel Chess Festival 2025 | Queen's Gambit Declined: Queen's Knight Variation | |
| Jul 22, 2025 | Egli | 0–1 | Schaefer | Biel Chess Festival 2025 | ? | |
| Jul 21, 2025 | Schaefer | 0–1 | Muehlemann | Biel Chess Festival 2025 | Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation | |
| Jul 18, 2025 | Runge | 1–0 | Schaefer | Biel Chess Festival 2025 | Zukertort Opening: Nimzo-Larsen Variation | |
| Jul 17, 2025 | Schaefer | 0–1 | Trzcinska | Biel Chess Festival 2025 | Queen's Pawn Game | |
| Jul 16, 2025 | Hasini Kamabathula | 1–0 | Schaefer | Biel Chess Festival 2025 | Sicilian Defense: Four Knights Variation | |
| Jul 15, 2025 | Schaefer | 1–0 | Jakob | Biel Chess Festival 2025 | King's Indian Defense: Normal Variation, Rare Defenses | |
| Jul 13, 2025 | Buerki | 1–0 | Schaefer | Biel Chess Festival 2025 Rapid | Indian Defense: Anti-Nimzo-Indian | |
| Jul 13, 2025 | Schaefer | 0–1 | Aryan Goyal | Biel Chess Festival 2025 Rapid | Italian Game: Scotch Gambit, Walbrodt-Baird Gambit | |
| Jul 13, 2025 | Schaefer | 0–1 | Wuerth | Biel Chess Festival 2025 Rapid | Sicilian Defense: Kan Variation, Knight Variation | |
| Jul 13, 2025 | Pinchetti | 1–0 | Schaefer | Round 1: Pinchetti, Andrea - Schaefer, Gion | Bird Opening: Dutch Variation | |
| Jul 12, 2025 | Schwarz | 1–0 | Schaefer | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Schaefer | 1–0 | Mani | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Portmann | 1–0 | Schaefer | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Dalay | 0–1 | Schaefer | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Schaefer | 0–1 | Rusconi | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Jordan | 0–1 | Schaefer | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 12, 2025 | Schaefer | 0–1 | Quilter | Biel Chess Festival 2025 Swiss CHampionship 960 | ? | |
| Jul 26, 2024 | Schaefer | 0–1 | Stoecklin | Biel Chess Festival WT2 | Sicilian Defense | |
| Jul 25, 2024 | Schaefer | 0–1 | Gottofrey | Biel Chess Festival WT2 | French Defense: Classical Variation, Tartakower Variation | |
| Jul 24, 2024 | Delaquis | 1–0 | Schaefer | Biel Chess Festival WT2 | Sicilian Defense: Alapin Variation | |
| Jul 23, 2024 | Schaefer | 0–1 | Illijin | Biel Chess Festival WT2 | English Opening: Anglo-Indian Defense, Hedgehog System | |
| Jul 22, 2024 | Javet | 1–0 | Schaefer | Biel Chess Festival WT2 | Sicilian Defense: French Variation | |
| Jul 21, 2024 | Schaefer | 0–1 | Degtiarev | Biel Chess Festival BTZ | Italian Game: Scotch Gambit, Walbrodt-Baird Gambit | |
| Jul 21, 2024 | Schaefer | 0–1 | Vemparala | Biel Chess Festival BTZ | Italian Game: Scotch Gambit, Walbrodt-Baird Gambit | |
| Jul 21, 2024 | Schaefer | 0–1 | Bucher | Biel Chess Festival BTZ | Sicilian Defense | |
| Jul 21, 2024 | Fejzullahu | 1–0 | Schaefer | Biel Chess Festival BTZ | Nimzo-Indian Defense: Three Knights Variation | |
| Jul 14, 2024 | Schaefer | 0–1 | Materia | Biel Chess Festival RAP | Queen's Gambit Declined: Normal Defense | |
| Jul 14, 2024 | Bilguun | 1–0 | Schaefer | Biel Chess Festival RAP | Sicilian Defense: Closed | |
| Jul 14, 2024 | Settegrana | ½–½ | Schaefer | Biel Chess Festival RAP | Sicilian Defense: Mengarini Variation | |
| Jul 13, 2024 | Schaefer | 0–1 | Gloeckler | Biel Chess Festival 960 | ? | |
| Jul 13, 2024 | Schaefer | 0–1 | Olarte | Biel Chess Festival 960 | ? | |
| Jul 13, 2024 | Schaefer | 0–1 | Keymer | Biel Chess Festival 960 | ? | |
| Jul 13, 2024 | Claude | 0–1 | Schaefer | Biel Chess Festival 960 | ? | |
| Jul 13, 2024 | Musaelyan | 1–0 | Schaefer | Biel Chess Festival 960 | ? | |