| 23 jul 2026 | Arndt, Uwe 2005 | Angst, Oliver 2121 | 1-0 | D10 Defensa Eslava: Exchange Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 62 | Ver |
| 21 jul 2026 | Arndt, Uwe 2005 | Fogo Esquivel, Levi Kalani Alexander 2125 | ½-½ | E05 Apertura Catalana: Open Defense, Classical Line | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 74 | Ver |
| 16 jul 2026 | Arndt, Uwe 2005 | Dauth, Benjamin 2247 | ½-½ | A41 Apertura de Peón de Dama: Rossolimo Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 7 | Ver |
| 14 jul 2026 | Udelnov, Valentin 2269 | Arndt, Uwe 2005 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Short Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 32 | Ver |
| 13 jul 2026 | Balabayeva, Xeniya 2302 | Arndt, Uwe 2005 | 1-0 | D43 Defensa Semieslava | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 32 | Ver |