| Jun 24, 2026 | Khan | 0–1 | Mouskos | Round 5: Khan, Omar - Mouskos, Mia | French Defense: Exchange Variation | |
| Jun 24, 2026 | Johal | 1–0 | Mouskos | Round 4: Johal, Aseece Joraver - Mouskos, Mia | French Defense: Horwitz Attack, Papa-Ticulat Gambit | |
| Jun 23, 2026 | Rothwell | ½–½ | Mouskos | 2026 English Schools Chess Championships Final | French Defense: Advance Variation, Euwe Variation | |
| Jun 23, 2026 | Mouskos | 1–0 | Shehroze Labeeb | 2026 English Schools Chess Championships Final | Scotch Game: Lolli Variation | |
| Jun 23, 2026 | Mouskos | ½–½ | Li | Round 1: Mouskos, Mia - Li, Ethan | Sicilian Defense: Old Sicilian | |
| Mar 7, 2026 | Mouskos | 1–0 | Keen | 2026 SPTW Athena Finals - Under 16 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Mar 7, 2026 | Arora | 0–1 | Mouskos | 2026 SPTW Athena Finals - Under 16 | ? | |
| Mar 7, 2026 | Mouskos | 1–0 | McCarthy | 2026 SPTW Athena Finals - Under 16 | Scandinavian Defense: Marshall Variation | |
| Mar 7, 2026 | Dicen | 1–0 | Mouskos | 2026 SPTW Athena Finals - Under 16 | Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line | |
| Mar 4, 2026 | Kishore Kumar | ½–½ | Mouskos | 2026 SPTW Athena Finals - Under 16 | Queen's Pawn Game: London System | |
| Oct 19, 2025 | Hariharan | 1–0 | Mouskos | Round 11: Hariharan, Shambavi - Mouskos, Mia | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Oct 19, 2025 | Mouskos | 0–1 | Yu | Round 10: Mouskos, Mia - Yu, Rock | Alekhine Defense | |
| Oct 19, 2025 | Dicen | 1–0 | Mouskos | Round 8: Dicen, Elis Denele - Mouskos, Mia | Catalan Opening: Closed, Main Line | |
| Oct 19, 2025 | Mouskos | 0–1 | Freeman | Round 7: Mouskos, Mia - Freeman, Luke | Sicilian Defense: Hyperaccelerated Dragon | |
| Oct 18, 2025 | Zhu | 1–0 | Mouskos | Round 6: Zhu, Pengxiao - Mouskos, Mia | Queen's Gambit Declined: Exchange Variation | |
| Oct 18, 2025 | Mouskos | 0–1 | Lebedev | Round 5: Mouskos, Mia - Lebedev, Lion | Scotch Game: Classical Variation | |
| Oct 18, 2025 | Sefton | ½–½ | Mouskos | Round 4: Sefton, Adam - Mouskos, Mia | French Defense: Rubinstein Variation, Blackburne Defense | |
| Oct 18, 2025 | Mouskos | 0–1 | Sisupalan | Round 3: Mouskos, Mia - Sisupalan, Beni | Scotch Game: Classical Variation | |
| Oct 18, 2025 | Lukhi | 1–0 | Mouskos | Round 2: Lukhi, Neev - Mouskos, Mia | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Oct 18, 2025 | Mouskos | 0–1 | Wang | Round 1: Mouskos, Mia - Wang, Luoke | Sicilian Defense: Old Sicilian | |
| Oct 17, 2025 | Mouskos | 1–0 | Van Neerven | Round 9: Mouskos, Mia - Van Neerven, Yvon | ? | |
| Jul 31, 2025 | Swiatkowski | 1–0 | Mouskos | Round 9: Swiatkowski, Dominik - Mouskos, Mia | King's Indian Attack: Sicilian Variation | |
| Jul 31, 2025 | Mouskos | 0–1 | Ramzan | Round 8: Mouskos, Mia - Ramzan, Timur | Caro-Kann Defense: Two Knights Attack | |
| Jul 31, 2025 | Mouskos | 0–1 | Cheung | Round 7: Mouskos, Mia - Cheung, Tsz Kin | Caro-Kann Defense: Two Knights Attack | |
| Jul 31, 2025 | Rajaguru | 0–1 | Mouskos | Round 6: Rajaguru, Diyenka Kithumi - Mouskos, Mia | French Defense: Advance Variation, Euwe Variation | |
| Jul 31, 2025 | Mouskos | 1–0 | Spirling | Round 5: Mouskos, Mia - Spirling, Florence | French Defense: Advance Variation, Euwe Variation | |
| Jul 31, 2025 | Puig-Souto | 1–0 | Mouskos | Round 4: Puig-Souto, Luca - Mouskos, Mia | French Defense: Advance Variation, Euwe Variation | |
| Jul 31, 2025 | Clarke | 1–0 | Mouskos | Round 2: Clarke, John - Mouskos, Mia | Zukertort Opening: Queen's Gambit Invitation | |
| Jul 31, 2025 | Mouskos | 0–1 | Pranav Mathur | Round 1: Mouskos, Mia - Pranav Mathur | French Defense: Exchange Variation | |
| Jun 26, 2025 | Mouskos | 1–0 | Toby Varney | Round 6: Mouskos, Mia - Toby Varney | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Jun 26, 2025 | Mouskos | 0–1 | Bethan Colligan | Round 5: Mouskos, Mia - Bethan Colligan | Scotch Game | |
| Jun 25, 2025 | Tatenda Midzi | 0–1 | Mouskos | Round 4: Tatenda Midzi - Mouskos, Mia | French Defense: Advance Variation, Steinitz Variation | |
| Jun 25, 2025 | Aditya Prasad | 1–0 | Mouskos | Round 3: Aditya Prasad - Mouskos, Mia | French Defense: Exchange Variation | |
| Jun 25, 2025 | Mouskos | ½–½ | Gushchin | Round 2: Mouskos, Mia - Gushchin, Arseniy | Scotch Game | |
| Jun 25, 2025 | Mouskos | ½–½ | Chadwick | Round 1: Mouskos, Mia - Chadwick, Thomas | French Defense: Exchange Variation | |
| Oct 11, 2024 | Mouskos | 0–1 | Shearsby | Round 11: Mouskos, Mia - Shearsby, Jude | Nimzowitsch Defense: Scandinavian Variation, Exchange Variation | |
| Jul 27, 2024 | Mouskos | 0–1 | Chu | Round 9: Mouskos, Mia - Chu, Edward | Pirc Defense: Classical Variation | |
| Jul 27, 2024 | Henry Makin | 0–1 | Mouskos | Round 8: Henry Makin - Mouskos, Mia | Queen's Gambit Declined | |
| Jul 27, 2024 | Mouskos | 0–1 | Luthia | Round 7: Mouskos, Mia - Luthia, Indra Jatin | Scotch Game: Classical Variation | |
| Jul 26, 2024 | Vihaan Mathur | 1–0 | Mouskos | Round 6: Vihaan Mathur - Mouskos, Mia | Queen's Pawn Game: London System | |
| Jul 26, 2024 | Mouskos | 0–1 | Catabay | Round 5: Mouskos, Mia - Catabay, Mae Katelyn Rose | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jul 26, 2024 | Pandya | 0–1 | Mouskos | Round 4: Pandya, Dhairya - Mouskos, Mia | French Defense: Exchange Variation | |
| Jul 26, 2024 | Mouskos | ½–½ | Xu | Round 3: Mouskos, Mia - Xu, Jiarui | Scotch Game | |
| Jul 26, 2024 | Karmin Kaul | 0–1 | Mouskos | Round 2: Karmin Kaul - Mouskos, Mia | French Defense: Advance Variation, Nimzowitsch System | |
| Jul 26, 2024 | Mouskos | 0–1 | Sisupalan | Round 1: Mouskos, Mia - Sisupalan, Beni | Scotch Game: Classical Variation | |
| Mar 3, 2024 | Grigoryan | 1–0 | Mouskos | British Rapidplay Championship 2024 | Queen's Pawn Game: Veresov Attack, Classical Defense | |
| Mar 3, 2024 | Mouskos | 1–0 | Fairhurst | British Rapidplay - lower boards | Caro-Kann Defense: Two Knights Attack | |
| Mar 3, 2024 | Mouskos | ½–½ | Graham | British Rapidplay - lower boards | Petrov's Defense: Classical Attack, Chigorin Variation | |
| Mar 3, 2024 | Mehta | 0–1 | Mouskos | British Rapidplay - lower boards | Queen's Pawn Game: Accelerated London System | |
| Mar 3, 2024 | Mouskos | 0–1 | Barton | British Rapidplay - lower boards | Sicilian Defense: Old Sicilian | |
| Mar 2, 2024 | Smith | 1–0 | Mouskos | British Rapidplay Championship 2024 | French Defense: Tarrasch Variation, Open System | |
| Mar 2, 2024 | Mouskos | 1–0 | Caraway | British Rapidplay - lower boards | Scotch Game: Classical Variation | |
| Mar 2, 2024 | Kumar | 1–0 | Mouskos | British Rapidplay Championship 2024 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Mar 2, 2024 | Mouskos | 1–0 | Ashcroft | British Rapidplay - lower boards | Scotch Game | |
| Mar 2, 2024 | Caraway | 1–0 | Mouskos | British Rapidplay Championship 2024 | Saragossa Opening | |
| Mar 2, 2024 | Mouskos | 0–1 | Sivanandan | British Rapidplay Championship 2024 | Caro-Kann Defense: Two Knights Attack | |
| Oct 13, 2024 | Mouskos | 0–1 | Zhu | Round 7: Mouskos, Mia - Zhu, Pengxiao | Scotch Game: Classical Variation | |
| Oct 13, 2024 | Mouskos | 0–1 | He | Round 9: Mouskos, Mia - He, Tom Junde | Scotch Game: Schmidt Variation | |
| Oct 13, 2024 | Khoury | 1–0 | Mouskos | Round 8: Khoury, Theo - Mouskos, Mia | French Defense: Rubinstein Variation, Capablanca Line | |
| Oct 13, 2024 | Lapidus | 1–0 | Mouskos | Round 10: Lapidus, Alexey M. - Mouskos, Mia | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Oct 12, 2024 | Mouskos | 0–1 | Badacsonyi | Round 1: Mouskos, Mia - Badacsonyi, Stanley | French Defense: Exchange Variation | |
| Oct 12, 2024 | Mouskos | 1–0 | Hariharan | Round 3: Mouskos, Mia - Hariharan, Shambavi | Scotch Game: Classical Variation | |
| Oct 12, 2024 | Mouskos | 0–1 | Mitraka | Round 5: Mouskos, Mia - Mitraka, Chrysoula-Paraskevi | Caro-Kann Defense: Two Knights Attack | |
| Oct 12, 2024 | Dicen | 1–0 | Mouskos | Round 2: Dicen, Elis Denele - Mouskos, Mia | Queen's Gambit Declined | |
| Oct 12, 2024 | Cancedda-Dupuis | 1–0 | Mouskos | Round 4: Cancedda-Dupuis, Livio - Mouskos, Mia | French Defense: Steiner Variation | |
| Oct 12, 2024 | Balmond | ½–½ | Mouskos | Round 6: Balmond, Tom - Mouskos, Mia | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Oct 15, 2023 | Mouskos | 0–1 | Soulier | 2023 UK Chess Challenge Terafinal Under 12 | Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit | |
| Oct 15, 2023 | Mouskos | 0–1 | He | 2023 UK Chess Challenge Terafinal Under 12 | Sicilian Defense: Old Sicilian | |
| Oct 15, 2023 | Mouskos | 0–1 | Luk | 2023 UK Chess Challenge Terafinal Under 12 | Caro-Kann Defense: Two Knights Attack | |
| Oct 15, 2023 | Mittal | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | English Opening: Agincourt Defense, Wimpy System | |
| Oct 15, 2023 | Yu | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | Zukertort Opening: The Potato | |
| Oct 14, 2023 | Mouskos | 0–1 | Dicen | 2023 UK Chess Challenge Terafinal Under 12 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Oct 14, 2023 | Mouskos | 0–1 | Zhu | 2023 UK Chess Challenge Terafinal Under 12 | Scotch Game: Classical Variation | |
| Oct 14, 2023 | Dewangan | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| Oct 14, 2023 | Hariharan | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | Queen's Gambit Declined | |
| Oct 14, 2023 | Kumar | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | French Defense: Winawer Variation, Poisoned Pawn Variation, Paoli Variation | |
| Oct 14, 2023 | Bhatia | 1–0 | Mouskos | 2023 UK Chess Challenge Terafinal Under 12 | French Defense: Two Knights Variation | |
| Nov 13, 2021 | Mouskos | 0–1 | Mykhnenko | British Junior Rapidplay: Girls Under 12 | Scotch Game: Schmidt Variation | |
| Nov 13, 2021 | Oh | 1–0 | Mouskos | British Junior Rapidplay: Girls Under 12 | French Defense: Winawer Variation | |
| — | Mouskos | 0–1 | Greenland | Round 2: Mouskos, Mia - Greenland, Jake | Scotch Game: Classical Variation | |
| — | Barbier-Ramaiah | 1–0 | Mouskos | British Junior Rapidplay: Girls Under 12 | French Defense: Two Knights Variation | |
| — | Groot Wassink | 1–0 | Mouskos | British Junior Rapidplay: Girls Under 12 | French Defense: Winawer Variation, Advance Variation | |
| — | Cheung | 1–0 | Mouskos | Round 1: Cheung, Tsz Kin - Mouskos, Mia | Rapport-Jobava System | |
| — | Ramzan | 1–0 | Mouskos | Round 3: Ramzan, Timur - Mouskos, Mia | French Defense: Exchange Variation | |