| 15 ago 2026 | Gersemann, Karl 2103 | Udelnov, Valentin 2159 | 1-0 | C82 Apertura Española (Ruy López): Open, St. Petersburg Variation | 22. Lichtenberger Sommer 2026 | 38 | Ver |
| 12 ago 2026 | Udelnov, Valentin 2159 | Hesse, Henrik 2326 | ½-½ | B06 Defensa Moderna | 22. Lichtenberger Sommer 2026 | 78 | Ver |
| 10 ago 2026 | Udelnov, Valentin 2159 | Amelang, Thomas 2037 | 1-0 | B09 Defensa Pirc: Austrian Attack | 22. Lichtenberger Sommer 2026 | 60 | Ver |
| 7 ago 2026 | Schmidek, Emil 2429 | Udelnov, Valentin 2159 | ½-½ | A65 Defensa Benoni: King's Pawn Line | 22. Lichtenberger Sommer 2026 | 52 | Ver |
| 23 jul 2026 | Udelnov, Valentin 2269 | Al Ibrahim, Abdulrahman 2016 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Botvinnik-Carls Defense | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 37 | Ver |
| 21 jul 2026 | Udelnov, Valentin 2269 | Iafelice, Vincenzo 2086 | 0-1 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 60 | Ver |
| 20 jul 2026 | Udelnov, Valentin 2269 | Xu, Chang(CQ) 2125 | 0-1 | B53 Defensa Siciliana: Chekhover Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 40 | Ver |
| 18 jul 2026 | Stefan, Iulia-Cristiana 2053 | Udelnov, Valentin 2269 | 0-1 | E62 Defensa India de Rey: Fianchetto Variation, Carlsbad Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 56 | Ver |
| 17 jul 2026 | Kunz, Andre 2116 | Udelnov, Valentin 2269 | ½-½ | C26 Apertura Vienesa: Mieses Variation | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 43 | Ver |
| 16 jul 2026 | Udelnov, Valentin 2269 | Morrison, Joseph 2048 | 1-0 | B12 Defensa Caro-Kann: Advance Variation, Botvinnik-Carls Defense | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 47 | Ver |
| 15 jul 2026 | Ragavan, Samarth Rajesh 2106 | Udelnov, Valentin 2269 | 1-0 | A80 Defensa Holandesa: Hopton Attack | 59th Biel International Chess Festival 2026 | Open | Masters (MTO) | 44 | 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 |
| 25 may 2026 | Udelnov, Valentin 2140 | Kunin, Vitaly 2507 | 0-1 | B38 Defensa Siciliana: Accelerated Dragon, Maróczy Bind | Runde 7: Udelnov, Valentin - Kunin, Vitaly | 69 | Ver |
| 24 may 2026 | Udelnov, Valentin 2140 | Kanyamarala, Tarun 2418 | 1-0 | B45 Defensa Siciliana: Taimanov Variation | Runde 4: Udelnov, Valentin - Kanyamarala, Tarun | 30 | Ver |
| 22 may 2026 | Narayanan S L 2569 | Udelnov, Valentin 2140 | 1-0 | E47 Defensa Nimzoindia: Normal Variation | Runde 6: Narayanan S L - Udelnov, Valentin | 27 | Ver |
| 16 abr 2026 | Udelnov, Valentin 2186 | Fiedorek, Michal 2323 | 0-1 | B62 Defensa Siciliana: Richter-Rauzer Variation | EIIC 2026 | 51 | Ver |
| 15 abr 2026 | Gagic, Milan A 2337 | Udelnov, Valentin 2186 | ½-½ | C72 Apertura Española (Ruy López): Morphy Defense, Modern Steinitz Defense | EIIC 2026 | 36 | Ver |
| 13 abr 2026 | Hulka, Valentyn 2372 | Udelnov, Valentin 2186 | 1-0 | E10 Defensa India: Anti-Nimzo-Indian | EIIC 2026 | 67 | Ver |
| 7 abr 2026 | Udelnov, Valentin 2186 | Royal, Shreyas 2515 | 0-1 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | EICC 2026 | 58 | Ver |
| 30 dic 2025 | Beyer, Lorenz 2159 | Udelnov, Valentin 2233 | ½-½ | C50 Apertura Italiana: Giuoco Pianissimo, Normal | DVM U20 2025 | 51 | Ver |