| May 25, 2026 | Koukas | * | Gerlach | Round 7: Koukas, Anastasios - Gerlach, Felix | ? | |
| May 25, 2026 | Butzen | * | Koukas | Round 6: Butzen, Robin - Koukas, Anastasios | ? | |
| May 24, 2026 | Koukas | * | Stinis | Round 5: Koukas, Anastasios - Stinis, Steven | ? | |
| May 24, 2026 | Van der Hagen | * | Koukas | Round 4: Van der Hagen, Loek - Koukas, Anastasios | ? | |
| May 23, 2026 | Koukas | * | Koehler | Round 3: Koukas, Anastasios - Koehler, Ronald | ? | |
| May 23, 2026 | Verheyen | 1–0 | Koukas | Round 2: Verheyen, Olivier - Koukas, Anastasios | Petrov's Defense: Three Knights Game | |
| May 22, 2026 | Koukas | * | Van Doren | Round 1: Koukas, Anastasios - Van Doren, Bas | ? | |
| May 17, 2026 | De Rover | 0–1 | Koukas | Round 7: De Rover, Yong Hoon - Koukas, Anastasios | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 17, 2026 | Wierenga | 0–1 | Koukas | Round 6: Wierenga, Jael - Koukas, Anastasios | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| May 15, 2026 | Bruggink | ½–½ | Koukas | Round 4: Bruggink, Tycho - Koukas, Anastasios | King's Indian Attack | |
| May 15, 2026 | Koukas | 0–1 | Mostertman | Round 3: Koukas, Anastasios - Mostertman, Milan | French Defense: Exchange Variation | |
| May 14, 2026 | Almefalani | 0–1 | Koukas | Round 2: Almefalani, Abdulhay - Koukas, Anastasios | Sicilian Defense: Grand Prix Attack | |
| Oct 26, 2025 | Vlug | * | Koukas | Amsterdam Chess Open 2025 | Sicilian Defense: Alapin Variation | |
| Oct 26, 2025 | Koukas | 1–0 | Krishnasing | Amsterdam Chess Open 2025 | Queen's Gambit Accepted: Old Variation | |
| Aug 17, 2022 | Tsekmes | 1–0 | Koukas | National Greek Team Championship | Scotch Game: Potter Variation | |
| Aug 16, 2022 | Koukas | 0–1 | Georgiev | National Greek Team Championship | Sicilian Defense: Delayed Alapin Variation | |
| Aug 15, 2022 | Trifonas | 0–1 | Koukas | National Greek Team Championship | Indian Defense | |
| Aug 13, 2022 | Mourogiannis | ½–½ | Koukas | National Greek Team Championship | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Aug 12, 2022 | Spyropoulos | 1–0 | Koukas | National Greek Team Championship | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| — | Koukas | 1–0 | Vagiakos | National Greek Team Championship | Sicilian Defense: Alapin Variation | |
| — | Koukas | 1–0 | Babalikis | National Greek Team Championship | Sicilian Defense: Alapin Variation, Barmen Defense | |
