| 7 ago 2026 | Jessel, Stephen 2364 | Arun, Nitish 2175 | 1-0 | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | The 105th Irish Championship 2026 | Championship | 43 | Ver |
| 6 ago 2026 | Arun, Nitish 2175 | Melaugh, Shane 2157 | ½-½ | A91 Defensa Holandesa: Classical Variation | The 105th Irish Championship 2026 | Championship | 60 | Ver |
| 5 ago 2026 | Hushpit, Lukian 2088 | Arun, Nitish 2175 | ½-½ | C90 Apertura Española (Ruy López): Closed | The 105th Irish Championship 2026 | Championship | 56 | Ver |
| 3 ago 2026 | Ivanov, Andrey A. 2085 | Arun, Nitish 2175 | ½-½ | D38 Gambito de Dama rehusado: Westphalian Variation | The 105th Irish Championship 2026 | Championship | 21 | Ver |
| 2 ago 2026 | Arun, Nitish 2177 | Hughes, Padraig 2016 | ½-½ | D41 Gambito de Dama rehusado: Semi-Tarrasch Defense, Exchange Variation | The 105th Irish Championship 2026 | Championship | 54 | Ver |
| 26 jun 2026 | Ten Dam, Bram 2344 | Arun, Nitish 2177 | 1-0 | C26 Apertura Vienesa: Mieses Variation | FIDE World Youth Chess Championships 2026 | O14 | 28 | Ver |
| 25 jun 2026 | Jayasooriya, Ruvin Sandharu 2032 | Arun, Nitish 2177 | 0-1 | E06 Apertura Catalana: Closed | FIDE World Youth Chess Championships 2026 | O14 | 53 | Ver |
| 23 jun 2026 | Ritzerveld, Noah 2323 | Arun, Nitish 2177 | 1-0 | C72 Apertura Española (Ruy López): Morphy Defense, Modern Steinitz Defense | FIDE World Youth Chess Championships 2026 | O14 | 30 | Ver |
| 20 jun 2026 | Badole Shaunak 2249 | Arun, Nitish 2177 | ½-½ | A01 Ataque Nimzo-Larsen: Modern Variation | FIDE World Youth Chess Championships 2026 | O14 | 42 | Ver |
| 19 jun 2026 | Arun, Nitish 2177 | Abdsattar, Alisher 2429 | ½-½ | D37 Gambito de Dama rehusado: Three Knights Variation | FIDE World Youth Chess Championships 2026 | O14 | 29 | Ver |
| 18 jun 2026 | Hallmundarson, Birkir 2007 | Arun, Nitish 2177 | 0-1 | D38 Gambito de Dama rehusado: Westphalian Variation | FIDE World Youth Chess Championships 2026 | O14 | 94 | Ver |
| 16 jun 2026 | Ejsymont, Eryk 2009 | Arun, Nitish 2177 | ½-½ | C70 Apertura Española (Ruy López): Morphy Defense, Cozio Defense | FIDE World Youth Chess Championships 2026 | O14 | 31 | Ver |
| 26 abr 2026 | O`cuilleanain, Oisin 2177 | Arun, Nitish 2227 | 1-0 | E15 Defensa India de Dama: Fianchetto Variation, Nimzowitsch Variation | Irish National Club Championship 2026 | 56 | Ver |
| 26 abr 2026 | Arun, Nitish 2227 | Bartczak, Korneliusz 2106 | 1-0 | E32 Defensa Nimzoindia: Classical Variation | Irish National Club Championship 2026 | 42 | Ver |
| 2 abr 2026 | Arun, Nitish 2226 | Vetokhin, Savva 2559 | 0-1 | E39 Defensa Nimzoindia: Classical Variation, Berlin Variation, Pirc Variation | X Open Semana Santa 2026 - Grupo A | 51 | Ver |
| 20 dic 2025 | Rogulj, Branko 2246 | Arun, Nitish 2163 | 0-1 | B50 Defensa Siciliana: Delayed Alapin Variation, with d6 | Crikvenica open | 23 | Ver |
| 19 dic 2025 | Arun, Nitish 2163 | Novak, Ratko 2020 | 1-0 | D06 Gambito de Dama rehusado: Austrian Defense | Crikvenica open | 58 | Ver |
| 18 dic 2025 | Nitin, S. 2341 | Arun, Nitish 2163 | 1-0 | B76 Defensa Siciliana: Dragon Variation, Yugoslav Attack, Panov Variation | Crikvenica open | 32 | Ver |
| 17 dic 2025 | Arun, Nitish 2163 | Sundac, Ivano 2292 | ½-½ | D45 Defensa Semieslava: Normal Variation | Crikvenica open | 20 | Ver |
| 16 dic 2025 | Grgurevic, Benjamin 2008 | Arun, Nitish 2163 | 0-1 | B66 Defensa Siciliana: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | Crikvenica open | 85 | Ver |