| 9 ago 2026 | Nicholas, Koichi B 2114 | Shearsby, Jude 2293 | 0-1 | B90 Sicilian Defense: Scheveningen Variation, English Attack, with f3 | 2026 British Chess Championships: Championship | 24 | Ver |
| 8 ago 2026 | Pigott, John C 2255 | Nicholas, Koichi B 2114 | ½-½ | C54 Italian Game: Classical Variation, Giuoco Pianissimo | 2026 British Chess Championships: Championship | 43 | Ver |
| 7 ago 2026 | Nicholas, Koichi B 2114 | Terler, Bohdan 2035 | 1-0 | B36 Sicilian Defense: Accelerated Dragon, Maróczy Bind | 2026 British Chess Championships: Championship | 55 | Ver |
| 5 ago 2026 | Nicholas, Koichi B 2114 | Mirzoeva, Elmira 2261 | 0-1 | B18 Caro-Kann Defense: Classical Variation | 2026 British Chess Championships: Championship | 59 | Ver |
| 4 ago 2026 | Cheng, Louis 2008 | Nicholas, Koichi B 2114 | 0-1 | C54 Italian Game: Classical Variation, Giuoco Pianissimo | 2026 British Chess Championships: Championship | 32 | Ver |
| 3 ago 2026 | Thomas, James 2005 | Nicholas, Koichi B 2114 | 1-0 | A07 King's Indian Attack: Double Fianchetto | 2026 British Chess Championships: Championship | 40 | Ver |
| 2 ago 2026 | Nicholas, Koichi B 2114 | Kanyamarala, Trisha 2178 | ½-½ | B46 Sicilian Defense: Taimanov Variation | 2026 British Chess Championships: Championship | 43 | Ver |
| 1 ago 2026 | Nicholas, Koichi B 2114 | Yao, Lan 2308 | 0-1 | B90 Sicilian Defense: Najdorf Variation | 2026 British Chess Championships: Championship | 42 | Ver |
| 4 may 2026 | Nicholas, Koichi B 2116 | Kilambi, Venkata Ananth Akshay 2050 | 1-0 | B10 Caro-Kann Defense: Two Knights Attack | 4NCL Division 2 2025-2026 | 46 | Ver |
| 2 abr 2026 | Sibashvili, Giorgi 2405 | Nicholas, Koichi B 2090 | 1-0 | D20 Queen's Gambit Accepted: Central Variation, Greco Variation | Grenke Chess Festival 2026 Open | 32 | Ver |
| 22 mar 2026 | Nicholas, Koichi B 2091 | Swanson, Stephen 2137 | 0-1 | B06 Modern Defense: Standard Defense | 4NCL Division 2 2025-2026 | 44 | Ver |
| 7 feb 2026 | Nicholas, Koichi B 2078 | Terler, Bohdan 2096 | 1-0 | B10 Caro-Kann Defense: Endgame Variation | 4NCL Division 2 2025-2026 | 59 | Ver |
| 11 ene 2026 | Nicholas, Koichi B 2095 | Rawlinson, Aidan M 2070 | ½-½ | B12 Caro-Kann Defense: Advance Variation | 4NCL Division 2 2025-2026 | 27 | Ver |
| 7 dic 2025 | Aghayev, Miragha 2424 | Nicholas, Koichi B 2011 | 1-0 | C47 Four Knights Game: Gunsberg Variation | 2025 London Chess Classic | Super Rapidplay | 49 | Ver |
| 6 dic 2025 | Royal, Shreyas 2393 | Nicholas, Koichi B 2011 | 1-0 | A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation | 2025 London Chess Classic | Super Rapidplay | 39 | Ver |
| 6 dic 2025 | Nicholas, Koichi B 2011 | Iniyan, Pa 2450 | 0-1 | B90 Sicilian Defense: Scheveningen Variation, English Attack, with f3 | 2025 London Chess Classic | Super Rapidplay | 25 | Ver |
| 2 nov 2025 | Varnam, Liam D 2131 | Nicholas, Koichi B 2100 | 1-0 | C88 Ruy Lopez: Closed, Anti-Marshall | 4NCL Division 2 2025-2026 | 37 | Ver |