| 29 ago 2026 | Dias, Ivo Rodrigues 2080 | Olsen, William Alexander 2318 | 0-1 | B41 Defensa Siciliana: Kan Variation | Maia Chess Open 2026 | Masters | 52 | Ver |
| 28 ago 2026 | Olsen, William Alexander 2318 | Bluhm, Sonja Maria 2200 | 1-0 | A06 Apertura Zukertort | Maia Chess Open 2026 | Masters | 41 | Ver |
| 27 ago 2026 | Engelsen, Teodor Tenfjord 2178 | Olsen, William Alexander 2318 | ½-½ | A13 Apertura Inglesa: Agincourt Defense | Maia Chess Open 2026 | Masters | 63 | Ver |
| 26 ago 2026 | Olsen, William Alexander 2318 | Romero Pallares, Daniel 2296 | 0-1 | B12 Defensa Caro-Kann: Advance Variation | Maia Chess Open 2026 | Masters | 47 | Ver |
| 25 ago 2026 | Fernandes, Ricardo Paulos 2138 | Olsen, William Alexander 2318 | 0-1 | B32 Defensa Siciliana: Kalashnikov Variation | Maia Chess Open 2026 | Masters | 56 | Ver |
| 24 ago 2026 | Olsen, William Alexander 2318 | Gkoumas, Georgios 2438 | ½-½ | D30 Gambito de Dama rehusado: Traditional Variation | Maia Chess Open 2026 | Masters | 54 | Ver |
| 23 ago 2026 | Fidalgo, Andre Neves 2149 | Olsen, William Alexander 2318 | 0-1 | A27 Apertura Inglesa: King's English Variation, Three Knights System | Maia Chess Open 2026 | Masters | 42 | Ver |
| 22 ago 2026 | Olsen, William Alexander 2318 | Gonzalez Perez, Jose Ramon 2134 | ½-½ | D41 Gambito de Dama rehusado: Semi-Tarrasch Defense, Exchange Variation | Maia Chess Open 2026 | Masters | 26 | Ver |
| 22 ago 2026 | Reis, Pedro Rafael Melo 2073 | Olsen, William Alexander 2318 | 0-1 | B41 Defensa Siciliana: Kan Variation, Maróczy Bind, Réti Variation | Maia Chess Open 2026 | Masters | 60 | Ver |
| 7 jul 2026 | Engelsen, Teodor Tenfjord 2227 | Olsen, William Alexander 2215 | 0-1 | A07 Ataque Indio de Rey | Junior A | 52 | Ver |
| 6 jul 2026 | Olsen, William Alexander 2215 | Gjersvik, Aksel Elias 2072 | 1-0 | E81 Defensa India de Rey: Sämisch Variation, Normal Defense | Junior A | 57 | Ver |
| 28 jun 2026 | Sian, Shadi 2268 | Olsen, William Alexander 2215 | 1-0 | D32 Gambito de Dama rehusado: Tarrasch Defense | Junior A | 40 | Ver |
| 28 jun 2026 | Olsen, William Alexander 2215 | Myny, Sigur H 2026 | 1-0 | A20 Apertura Inglesa: King's English Variation | Junior A | 20 | Ver |
| 28 jun 2026 | Skaar, Ben Samuel Groth 2134 | Olsen, William Alexander 2215 | ½-½ | A45 Ataque Trompowsky | Junior A | 34 | Ver |
| 28 jun 2026 | Olsen, William Alexander 2215 | Khoo-Thwe, Louis 2268 | 1-0 | D43 Defensa Semieslava: Moscow Variation | Junior A | 39 | Ver |
| 28 jun 2026 | Olsen, William Alexander 2215 | Oksendal, Martin 2240 | ½-½ | C01 Defensa Francesa: Exchange Variation | Junior A | 5 | Ver |
| 26 jun 2026 | Olsen, William Alexander 2149 | Liu, Jason 2252 | ½-½ | E40 Defensa Nimzoindia: Rubinstein System | FIDE World Youth Chess Championships 2026 | O18 | 27 | Ver |
| 24 jun 2026 | Olsen, William Alexander 2149 | Khoo-Thwe, Louis 2271 | ½-½ | B27 Defensa Siciliana: Hyperaccelerated Dragon | FIDE World Youth Chess Championships 2026 | O18 | 47 | Ver |
| 23 jun 2026 | Olsen, William Alexander 2149 | Navarro Martinez, Victor 2298 | 0-1 | D35 Gambito de Dama rehusado: Exchange Variation, Positional Variation | World Youth Chess Championship 2026 U18 Open | 64 | Ver |
| 22 jun 2026 | Kurbanbaev, Zalkar 2019 | Olsen, William Alexander 2149 | 0-1 | C60 Apertura Española (Ruy López): Fianchetto Defense | FIDE World Youth Chess Championships 2026 | O18 | 65 | Ver |