| Dec 7, 2024 | Kosmidis | 0–1 | Bernadskiy | Round 1: Kosmidis, Ioannis - Bernadskiy, Vitaliy | King's Indian Attack: Symmetrical Defense | |
| Aug 15, 2022 | Kosmidis | * | Zalahoras | National Greek Team Championship | ? | |
| Aug 8, 2022 | Kosmidis | 0–1 | Triantafilidis | Thessaloniki Open | A | Sicilian Defense: French Variation | |
| Aug 7, 2022 | Amiridou | 0–1 | Kosmidis | Thessaloniki Open | A | Ruy Lopez: Schliemann Defense, Schönemann Attack | |
| Aug 3, 2022 | Kosmidis | 0–1 | Theoharidis | Thessaloniki Open | A | Dutch Defense: Semi-Leningrad Variation | |
| Aug 8, 2021 | Kosmidis | 1–0 | Nteligiorgis | 30th OPEN Chess International Tournament | Queen's Pawn Game | |
| Aug 7, 2021 | Stoimenidis | * | Kosmidis | 30th OPEN Chess International Tournament | ? | |
| Aug 6, 2021 | Kosmidis | * | Zaronikas | 30th OPEN Chess International Tournament | ? | |
| Aug 5, 2021 | Vardakas | * | Kosmidis | 30th OPEN Chess International Tournament | ? | |
| Aug 4, 2021 | Kosmidis | 0–1 | Alexakis | 30th OPEN Chess International Tournament | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Aug 3, 2021 | Loukopoulos | 0–1 | Kosmidis | 30th OPEN Chess International Tournament | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Aug 2, 2021 | Kosmidis | * | Nikolaev | 30th OPEN Chess International Tournament | ? | |
| Aug 2, 2021 | Nikolov | 1–0 | Kosmidis | 30th OPEN Chess International Tournament | Bogo-Indian Defense: Grünfeld Variation | |
| Aug 1, 2021 | Kosmidis | * | Vasiliadis | 30th OPEN Chess International Tournament | ? | |
| — | Kosmidis | 1–0 | Kazantzidis | National Greek Team Championship | Bogo-Indian Defense: Retreat Variation | |
| — | Kosmidis | 1–0 | Anagnostopoulos | ΠΑΝΕΛΛΗΝΙΟ ΠΡΩΤΑΘΛΗΜΑ BLITZ 2025 | Grünfeld Defense: Exchange Variation, Nadanian Attack | |
| — | Kosmidis | 1–0 | Stratigos | ΠΑΝΕΛΛΗΝΙΟ ΠΡΩΤΑΘΛΗΜΑ BLITZ 2025 | King's Indian Defense: Averbakh Variation, Geller Defense | |
| — | Kosmidis | 0–1 | Stoimenidis | ΠΑΝΕΛΛΗΝΙΟ ΠΡΩΤΑΘΛΗΜΑ BLITZ 2025 | Catalan Opening: Open Defense | |
| — | Kosmidis | 0–1 | Kourkoulos-Arditis | ΠΑΝΕΛΛΗΝΙΟ ΑΤΟΜΙΚΟ ΠΡΩΤΑΘΛΗΜΑ RAPID | King's Indian Attack | |
| — | Kosmidis | ½–½ | Koutras | ΠΑΝΕΛΛΗΝΙΟ ΑΤΟΜΙΚΟ ΠΡΩΤΑΘΛΗΜΑ RAPID | King's Indian Attack: Symmetrical Defense | |
| — | Alexiadis | 0–1 | Kosmidis | National Greek Team Championship | Grünfeld Defense: Exchange Variation | |
| — | Palaiologou | ½–½ | Kosmidis | ΠΑΝΕΛΛΗΝΙΟ ΠΡΩΤΑΘΛΗΜΑ BLITZ 2025 | Scotch Game: Scotch Gambit, Advance Variation | |
| — | Halkias | 1–0 | Kosmidis | ΠΑΝΕΛΛΗΝΙΟ ΠΡΩΤΑΘΛΗΜΑ BLITZ 2025 | English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld | |
| — | Papageorgiou | 0–1 | Kosmidis | ΠΑΝΕΛΛΗΝΙΟ ΑΤΟΜΙΚΟ ΠΡΩΤΑΘΛΗΜΑ RAPID 2025 | Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation | |
