| 22 ago 2026 | Emms, John M 2385 | Onslow, Alfie 2010 | 1-0 | B13 Caro-Kann Defense: Exchange Variation | 2026 Mind Sports Olympiad London Rapid - Open | 37 | Ver |
| 22 ago 2026 | Onslow, Alfie 2010 | Bodiroga, Predrag 2272 | ½-½ | B12 Caro-Kann Defense: Advance Variation, Tal Variation | 2026 Mind Sports Olympiad London Rapid - Open | 41 | Ver |
| 22 ago 2026 | Onslow, Alfie 2010 | Houska, Jovanka 2281 | 0-1 | B12 Caro-Kann Defense: Advance Variation, Tal Variation | 2026 Mind Sports Olympiad London Rapid - Open | 43 | Ver |
| 22 ago 2026 | Harvey, Marcus R 2450 | Onslow, Alfie 2010 | 0-1 | A06 Nimzo-Larsen Attack: Classical Variation | 2026 Mind Sports Olympiad London Rapid - Open | 41 | Ver |
| 20 ago 2026 | Kumar, Sanjit S 2074 | Onslow, Alfie 2199 | 0-1 | E46 Nimzo-Indian Defense: Reshevsky Variation | Kingston Invitational Swiss 2026 | 26 | Ver |
| 19 ago 2026 | Onslow, Alfie 2199 | Healey, Michael W 2112 | 1-0 | B40 Sicilian Defense: French Variation | Kingston Invitational Swiss 2026 | 26 | Ver |
| 19 ago 2026 | Onslow, Alfie 2199 | Walker, Samuel A 2075 | ½-½ | B22 Sicilian Defense: Alapin Variation, Barmen Defense | 5th Kingston Invitational | 49 | Ver |
| 9 ago 2026 | Onslow, Alfie 2199 | Pereslavtsev, Alexandr 2117 | 0-1 | B22 Sicilian Defense: Alapin Variation | 2026 British Chess Championships: Major Open | 45 | Ver |
| 7 ago 2026 | Onslow, Alfie 2199 | Compton, Alistair 2026 | 1-0 | C12 French Defense: McCutcheon Variation, Lasker Variation | 2026 British Chess Championships: Major Open | 31 | Ver |
| 5 ago 2026 | Onslow, Alfie 2199 | Patton, Zachary 2000 | 1-0 | B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | 2026 British Chess Championships: Major Open | 21 | Ver |
| 17 jul 2026 | Lebedev, Lion 2160 | Onslow, Alfie 2199 | 1-0 | D02 Queen's Pawn Game: Symmetrical Variation | 2026 British Chess Championships: Major Open | 46 | Ver |
| 4 jul 2026 | Onslow, Alfie 2199 | Price, Gwilym 2186 | ½-½ | B40 Sicilian Defense: French Variation | Open: Onslow, Alfie - Price, Gwilym | 76 | Ver |
| 4 may 2026 | Onslow, Alfie 2181 | Shafi, Declan 2165 | ½-½ | C55 Italian Game: Two Knights Defense, Modern Bishop's Opening | 4NCL Division 2 2025-2026 | 64 | Ver |
| 3 may 2026 | Rughani, Mahin 2087 | Onslow, Alfie 2181 | 0-1 | E10 Indian Defense: Anti-Nimzo-Indian | 4NCL Division 2 2025-2026 | 45 | Ver |
| 2 may 2026 | Rich, Aaron 2011 | Onslow, Alfie 2181 | 0-1 | E46 Nimzo-Indian Defense: Reshevsky Variation | 4NCL Division 2 2025-2026 | 35 | Ver |
| 7 abr 2026 | Onslow, Alfie 2195 | Illescas Cordoba, Miguel 2597 | 0-1 | C54 Italian Game: Classical Variation, Giuoco Pianissimo | V Open Chess Menorca 2026 | Open A | 56 | Ver |
| 22 mar 2026 | Bullen, Alex 2093 | Onslow, Alfie 2176 | 0-1 | A06 Zukertort Opening | 4NCL Division 2 2025-2026 | 45 | Ver |
| 21 mar 2026 | Onslow, Alfie 2176 | Cooksey, Paul S 2215 | ½-½ | B12 Caro-Kann Defense: Advance Variation, Short Variation | 4NCL Division 2 2025-2026 | 54 | Ver |
| 14 mar 2026 | Onslow, Alfie 2176 | Hill, Alistair 2119 | 1-0 | C11 French Defense: Steinitz Variation, Boleslavsky Variation | Pall Mall FIDE Congress 13th-15th March 2026 - Open | 50 | Ver |
| 13 mar 2026 | Onslow, Alfie 2176 | Makkar, Rajat 2418 | 0-1 | C55 Italian Game: Two Knights Defense, Modern Bishop's Opening | Pall Mall FIDE Congress 13th-15th March 2026 - Open | 51 | Ver |
