| Apr 9, 2026 | Katsoulis | 0–1 | Bartzos | Round 1: Katsoulis, Nikolaos - Bartzos, Iasonas | Scotch Game: Malaniuk Variation | |
| Nov 30, 2025 | Xynidis | 0–1 | Katsoulis | Round 6: Xynidis, Maximos - Katsoulis, Nikolaos | King's Indian Defense: Sämisch Variation, Yates Defense | |
| Nov 29, 2025 | Katsoulis | 0–1 | Kotovos | Round 5: Katsoulis, Nikolaos - Kotovos, Konstantinos | Scotch Game: Schmidt Variation | |
| Nov 29, 2025 | Katsoulis | 0–1 | Fragkakis | Round 4: Katsoulis, Nikolaos - Fragkakis, Georgios | Sicilian Defense: O'Kelly Variation, Normal System | |
| Nov 28, 2025 | Psomas | ½–½ | Katsoulis | Round 3: Psomas, Konstantinos - Katsoulis, Nikolaos | Sicilian Defense: Closed | |
| Nov 28, 2025 | Katsoulis | 0–1 | Kalonomos | Round 2: Katsoulis, Nikolaos - Kalonomos, Ioannis | Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line | |
| Nov 27, 2025 | Arampatzis | ½–½ | Katsoulis | Round 1: Arampatzis, Athanasios - Katsoulis, Nikolaos | Sicilian Defense: Old Sicilian | |
| Jul 7, 2025 | Katsoulis | 0–1 | Kalogeropoulos | Round 2: Katsoulis, Nikolaos - Kalogeropoulos, Konstantinos | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Jun 28, 2024 | Katsoulis | 1–0 | Gkrekidis | Round 9: Katsoulis, Nikolaos - Gkrekidis, Konstantinos | Italian Game: Two Knights Defense, Max Lange Attack | |
| Jun 27, 2024 | Katsoulis | * | Vasileiou | Round 8: Katsoulis, Nikolaos - Vasileiou, Konstantinos D | ? | |
| Jun 26, 2024 | Tsigkogiannis | * | Katsoulis | Round 7: Tsigkogiannis, Panagiotis - Katsoulis, Nikolaos | ? | |
| Jun 25, 2024 | Katsoulis | * | Koutsioumpos | Round 6: Katsoulis, Nikolaos - Koutsioumpos, Grigorios | ? | |
| Jun 25, 2024 | Rompanos | * | Katsoulis | Round 5: Rompanos, Alexandros - Katsoulis, Nikolaos | ? | |
| Jun 24, 2024 | Katsoulis | * | Ilias | Round 4: Katsoulis, Nikolaos - Ilias, Christos | ? | |
| Jun 23, 2024 | Kakagiannis | * | Katsoulis | Round 3: Kakagiannis, Stylianos - Katsoulis, Nikolaos | ? | |
| Jun 23, 2024 | Katsoulis | * | Xynidis | Round 2: Katsoulis, Nikolaos - Xynidis, Maximos | ? | |
