| May 5, 2025 | Mihalik | 0–1 | Verbytski | Round 11: Mihalik, Agoston - Verbytski, Oleg | Sicilian Defense: Closed, Traditional | |
| May 4, 2025 | Mihalik | ½–½ | Hughes | Round 10: Mihalik, Agoston - Hughes, Roy | Scandinavian Defense: Gubinsky-Melts Defense | |
| May 3, 2025 | Gallana | 1–0 | Mihalik | Round 9: Gallana, Marco - Mihalik, Agoston | English Opening: Agincourt Defense, Wimpy System | |
| Apr 6, 2025 | Udovenko | 1–0 | Mihalik | Round 8: Udovenko, Daniel - Mihalik, Agoston | Queen's Gambit Declined: Cambridge Springs Defense | |
| Apr 5, 2025 | Mihalik | 0–1 | Valdepenas Octavio | Round 7: Mihalik, Agoston - Valdepenas Octavio, Javier | Scotch Game: Potter Variation | |
| Mar 2, 2025 | Mihalik | ½–½ | Yoon | Round 11: Mihalik, Agoston - Yoon, Jacob D | French Defense: Tarrasch Variation, Morozevich Variation | |
| Feb 16, 2025 | Shek | 0–1 | Mihalik | Round 6: Shek, Daniel - Mihalik, Agoston | English Opening: Four Knights System, Nimzowitsch Variation | |
| Mar 2, 2025 | Mihalik | 1–0 | Lapidus | Round 7: Mihalik, Agoston - Lapidus, Alexey M. | Sicilian Defense: French Variation | |
| Mar 2, 2025 | Mihalik | 0–1 | Boswell | Round 9: Mihalik, Agoston - Boswell, Jacob Connor | Sicilian Defense: Hyperaccelerated Dragon | |
| Mar 2, 2025 | Cheng | 0–1 | Mihalik | Round 8: Cheng, Louis - Mihalik, Agoston | Sicilian Defense: Closed | |
| Mar 2, 2025 | Hughes | 0–1 | Mihalik | Round 10: Hughes, Roy - Mihalik, Agoston | Queen's Pawn Game: London System | |
| Mar 1, 2025 | Mihalik | 1–0 | Sriram | Round 1: Mihalik, Agoston - Sriram, Gautam | Scandinavian Defense: Main Line | |
| Mar 1, 2025 | Mihalik | 0–1 | Gormally | Round 3: Mihalik, Agoston - Gormally, Daniel W | Sicilian Defense: Moscow Variation | |
| Mar 1, 2025 | Mihalik | ½–½ | White | Round 5: Mihalik, Agoston - White, Stuart A | Sicilian Defense: Moscow Variation, Main Line | |
| Mar 1, 2025 | Fairhurst | 0–1 | Mihalik | Round 2: Fairhurst, Frederick - Mihalik, Agoston | Sicilian Defense: French Variation | |
| Mar 1, 2025 | Sagues | 0–1 | Mihalik | Round 4: Sagues, Vincent - Mihalik, Agoston | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Mar 1, 2025 | Sarakauskas | 1–0 | Mihalik | Round 6: Sarakauskas, Gediminas - Mihalik, Agoston | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jan 26, 2025 | Mason | ½–½ | Mihalik | Round 4: Mason, Donald J - Mihalik, Agoston | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jan 25, 2025 | Mihalik | 1–0 | Saunders | Round 3: Mihalik, Agoston - Saunders, Aron | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Feb 24, 2024 | Mihalik | ½–½ | Asgarova | Round 9: Mihalik, Agoston - Asgarova, Turan | Sicilian Defense: French Variation | |
| Feb 23, 2024 | Wheatley | 0–1 | Mihalik | Round 8: Wheatley, Wilfred - Mihalik, Agoston | Sicilian Defense: Delayed Alapin Variation | |
| Feb 23, 2024 | Mihalik | ½–½ | Lazarus | Round 7: Mihalik, Agoston - Lazarus, Simon E | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Feb 22, 2024 | Evans | ½–½ | Mihalik | Round 6: Evans, Ruben - Mihalik, Agoston | Queen's Gambit Declined: Cambridge Springs Defense | |
| Jul 30, 2023 | Trisha Kanyamarala | 1–0 | Agoston Mihalik | British Chess Championships 2023: Championship | Nimzo-Indian Defense: Romanishin Variation | |
| Jul 28, 2023 | Mihalik | 1–0 | Shaw | British Chess Championships 2023: Championship | French Defense: Tarrasch Variation, Open System, Euwe-Keres Line | |
| Jul 26, 2023 | Mihalik | 0–1 | Bates | British Chess Championships 2023: Championship | Sicilian Defense: Moscow Variation, Main Line | |
| Jul 25, 2023 | Dignam | 0–1 | Mihalik | British Chess Championships 2023: Championship | Sicilian Defense: French Variation | |
| Jul 24, 2023 | Mihalik | 0–1 | Han | British Chess Championships 2023: Championship | Sicilian Defense: French Variation | |
| Jul 23, 2023 | Hebden | ½–½ | Mihalik | British Chess Championships 2023: Championship | Queen's Gambit Declined: Cambridge Springs Defense | |
| Jul 22, 2023 | Mihalik | ½–½ | Pert | British Chess Championships 2023: Championship | Caro-Kann Defense: Advance Variation | |
| Feb 19, 2023 | Patel | ½–½ | Mihalik | Cambridge International Open | Zukertort Opening | |
| Feb 18, 2023 | Mihalik | 0–1 | Czopor | Cambridge International Open | Sicilian Defense: French Variation | |
| Feb 18, 2023 | Ibn Saifullah | ½–½ | Mihalik | Cambridge International Open | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| Feb 17, 2023 | Mihalik | 1–0 | Pert | Cambridge International Open | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Feb 17, 2023 | Clarke | 1–0 | Mihalik | Cambridge International Open | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Feb 16, 2023 | Mihalik | 1–0 | Gardiner | Cambridge International Open | French Defense: Tarrasch Variation, Morozevich Variation | |
| Feb 16, 2023 | Fernandez | 1–0 | Mihalik | Cambridge International Open | Rapport-Jobava System | |
| Feb 15, 2023 | Mihalik | 1–0 | Lenton | Cambridge International Open | Philidor Defense: Lion Variation | |
| Feb 15, 2023 | Chan | 0–1 | Mihalik | Cambridge International Open | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jun 26, 2022 | Mihalik | 0–1 | Arora | 4NCL Main League 1-2 | Italian Game: Classical Variation, Greco Gambit | |
| Jun 25, 2022 | Eggleston | ½–½ | Mihalik | 4NCL Main League 1-2 | Sicilian Defense: Paulsen-Basman Defense | |
| May 2, 2022 | Mihalik | 0–1 | Harvey | 4NCL Main League 1-2 | Caro-Kann Defense: Advance Variation, Short Variation | |
| May 1, 2022 | Mihalik | 0–1 | Sowray | 4NCL Main League 1-2 | Sicilian Defense: Moscow Variation | |
| Apr 30, 2022 | Zeidler | ½–½ | Mihalik | 4NCL Main League 1-2 | Sicilian Defense: Closed | |
| Jun 14, 2021 | Lyell | ½–½ | Mihalik | First Saturday June | IM | Sicilian Defense: Delayed Alapin Variation | |
| Jun 12, 2021 | Mihalik | 0–1 | Turzo | First Saturday June | IM | Caro-Kann Defense: Advance Variation | |
| Jun 11, 2021 | Papadiamandis | ½–½ | Mihalik | First Saturday June | IM | Sicilian Defense: Kan Variation, Knight Variation | |
| Jun 9, 2021 | Mihalik | * | Ilincic | First Saturday June | IM | ? | |
| Jun 8, 2021 | O`Donnell | 1–0 | Mihalik | First Saturday June | IM | Sicilian Defense: Paulsen-Basman Defense | |
| Jun 7, 2021 | Mihalik | ½–½ | Fule | First Saturday June | IM | Scotch Game: Mieses Variation | |
| Jun 6, 2021 | Szeberenyi | 0–1 | Mihalik | First Saturday June | IM | Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation | |
| Jun 5, 2021 | Mihalik | 0–1 | Geher | First Saturday June | IM | Sicilian Defense: French Variation | |
| — | Khoury | ½–½ | Mihalik | British Chess Championships 2023: Championship | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |