| Jul 4, 2025 | Kratimenou | 0–1 | Kosma | Round 7: Kratimenou, Georgia - Kosma, Maria | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jul 3, 2025 | Kosma | ½–½ | Tsakona | Round 6: Kosma, Maria - Tsakona, Maria | Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation | |
| Jul 3, 2025 | Apostolakaki | ½–½ | Kosma | Round 4: Apostolakaki, Evangelia - Kosma, Maria | Rapport-Jobava System | |
| Jul 3, 2025 | Christodoulou | 0–1 | Kosma | Round 3: Christodoulou, Georgia - Kosma, Maria | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Jul 3, 2025 | Haralabidou | ½–½ | Kosma | Round 2: Haralabidou, Maria - Kosma, Maria | Nimzo-Indian Defense: Rubinstein System | |
| Jul 3, 2025 | Dalla | ½–½ | Kosma | Round 1: Dalla, Maria Myrsini - Kosma, Maria | Sicilian Defense: Prins Variation | |
| Jul 3, 2025 | Kosma | 1–0 | Platsaki | Round 5: Kosma, Maria - Platsaki, Evgenia Valeria | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Apr 11, 2025 | Kosma | ½–½ | Bania | Round 11: Kosma, Maria - Bania, Eleni | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Apr 10, 2025 | Acarbay | 1–0 | Kosma | Round 10: Acarbay, Algi - Kosma, Maria | Sicilian Defense: Closed, Traditional | |
| Apr 9, 2025 | Kosma | ½–½ | Hariharan | Round 9: Kosma, Maria - Hariharan, Shambavi | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Apr 8, 2025 | Bhatia | 1–0 | Kosma | Round 8: Bhatia, Kanishka - Kosma, Maria | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Apr 7, 2025 | Kosma | 0–1 | Ter-Avetisjana | Round 7: Kosma, Maria - Ter-Avetisjana, Agnesa Stepania | Caro-Kann Defense: Two Knights Attack, Mindeno Variation | |
| Apr 5, 2025 | Dicen | ½–½ | Kosma | Round 6: Dicen, Elis Denele - Kosma, Maria | Catalan Opening: Closed | |
| Apr 4, 2025 | Kosma | 0–1 | Terbe | Round 5: Kosma, Maria - Terbe, Zsuzsanna | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Apr 3, 2025 | Zimina | 1–0 | Kosma | Round 4: Zimina, Olga - Kosma, Maria | Catalan Opening: Open Defense, Classical Line | |
| Apr 2, 2025 | Kosma | 1–0 | Bochnickova | Round 3: Kosma, Maria - Bochnickova, Simona | Ruy Lopez: Open | |
| Apr 1, 2025 | Tsolakidou | 1–0 | Kosma | Round 2: Tsolakidou, Stavroula - Kosma, Maria | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Mar 31, 2025 | Kosma | 1–0 | Khurtsilava | Round 1: Kosma, Maria - Khurtsilava, Inga | Sicilian Defense: Katalimov Variation | |
| Sep 3, 2024 | Mylonakis | 1–0 | Kosma | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Nimzo-Indian Defense: Kmoch Variation | |
| Sep 2, 2024 | Kosma | ½–½ | Ntounis | 31ο OPEN ΣΚΑΚΙΣΤΙΚΟ ΤΟΥΡΝΟΥΑ ΝΙΚΑΙΑΣ \"ΤΙΜΗ ΣΤΗΝ ΕΘΝΙΚΗ ΑΝΤΙΣΤΑΣΗ\" A GROUP | Ruy Lopez: Open, Classical Defense | |
| Jul 10, 2024 | Tzempelikou | ½–½ | Kosma | Greek League 2024 | Queen's Pawn Game: London System | |
| Jul 9, 2024 | Kosma | 1–0 | Kaka | Greek League 2024 | Scandinavian Defense: Main Line, Mieses Variation | |
| Jul 8, 2024 | Athanasiou | ½–½ | Kosma | Greek League 2024 | Queen's Gambit Declined: Queen's Knight Variation | |
| Jul 7, 2024 | Kosma | 1–0 | Apostolakaki | Greek League 2024 | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Jul 6, 2024 | Dereka | 0–1 | Kosma | Greek League 2024 | Tarrasch Defense: Two Knights Variation | |
| Jul 5, 2024 | Kosma | 1–0 | Tzavara | Greek League 2024 | Sicilian Defense: French Variation, Normal | |
| Jul 4, 2024 | Karavitaki | 1–0 | Kosma | Greek League 2024 | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| May 13, 2024 | Kosma | 1–0 | Anemogianni | Round 7: Kosma, Maria - Anemogianni, Savvina | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 12, 2024 | Alexandri | ½–½ | Kosma | Round 6: Alexandri, Vasiliki - Kosma, Maria | Nimzo-Indian Defense: Classical Variation | |
| May 11, 2024 | Kosma | 1–0 | Tzima | Round 5: Kosma, Maria - Tzima, Despoina Anna | Ruy Lopez: Morphy Defense, Cozio Defense | |
| May 10, 2024 | Kalamoukou | 1–0 | Kosma | Round 4: Kalamoukou, Giolanta - Kosma, Maria | Tarrasch Defense: Two Knights Variation | |
| May 9, 2024 | Kosma | 1–0 | Dereka | Round 3: Kosma, Maria - Dereka, Konstantina | French Defense: Advance Variation, Main Line | |
| May 8, 2024 | Giakoustidou | 0–1 | Kosma | Round 2: Giakoustidou, Evgenia - Kosma, Maria | Sicilian Defense: Najdorf Variation | |
| May 7, 2024 | Kosma | ½–½ | Maniati | Round 1: Kosma, Maria - Maniati, Konstantina | Sicilian Defense: Taimanov Variation | |
| Nov 24, 2023 | Ismayil | 0–1 | Kosma | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Nov 23, 2023 | Kosma | 0–1 | Maton | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Nov 22, 2023 | Shubhi | 1–0 | Kosma | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Queen's Pawn Game: Colle System | |
| Nov 21, 2023 | Kosma | 1–0 | Rice | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Sicilian Defense: Dragon Variation, Yugoslav Attack | |
| Nov 20, 2023 | Cymbron | 0–1 | Kosma | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Sicilian Defense: Moscow Variation | |
| Nov 18, 2023 | Kosma | 0–1 | Momyn | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | French Defense: Advance Variation, Main Line | |
| Nov 17, 2023 | Peglau | * | Kosma | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | English Opening: Agincourt Defense | |
| Nov 16, 2023 | Kosma | 1–0 | Di Fabio | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Caro-Kann Defense: Exchange Variation | |
| Nov 15, 2023 | Vukovic | ½–½ | Kosma | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Queen's Pawn Game: London System | |
| Nov 14, 2023 | Kosma | 0–1 | Kheerthi | FIDEWORLDYOUTHCHESSCHAMPIONSHIP Girl 16 | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Aug 15, 2022 | Chatzipanagiotou | * | Kosma | National Greek Team Championship | ? | |
| — | Kosma | 1–0 | Terzidi | National Greek Team Championship | Ruy Lopez: Morphy Defense, Caro Variation | |
| — | Kosma | 0–1 | Koutsouraki | National Greek Team Championship | Ruy Lopez: Berlin Defense | |
