| Apr 17, 2026 | Gkountroumpis | 1–0 | Tsarouchas | Round 5: Gkountroumpis, Ioannis - Tsarouchas, Athanasios | Ruy Lopez: Open, Motzko Attack | |
| Apr 16, 2026 | Fragkakis | 1–0 | Gkountroumpis | Round 4: Fragkakis, Georgios - Gkountroumpis, Ioannis | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 9, 2026 | Gkountroumpis | 0–1 | Bartzos | Round 7: Gkountroumpis, Ioannis - Bartzos, Iasonas | Ruy Lopez: Berlin Defense, l'Hermet Variation | |
| Nov 30, 2025 | Kotovos | 1–0 | Gkountroumpis | Round 6: Kotovos, Konstantinos - Gkountroumpis, Ioannis | Catalan Opening: Closed | |
| Nov 29, 2025 | Ressou | 0–1 | Gkountroumpis | Round 5: Ressou, Afroditi - Gkountroumpis, Ioannis | English Opening: Agincourt Defense | |
| Nov 29, 2025 | Gkountroumpis | 1–0 | Pappas | Round 4: Gkountroumpis, Ioannis - Pappas, Ilias | French Defense: Tarrasch Variation, Open System, Main Line | |
| Nov 28, 2025 | Kasmeridis | 1–0 | Gkountroumpis | Round 3: Kasmeridis, Orfeas - Gkountroumpis, Ioannis | French Defense: Rubinstein Variation, Blackburne Defense | |
| Nov 28, 2025 | Gkountroumpis | 1–0 | Pantelis | Round 2: Gkountroumpis, Ioannis - Pantelis, Athanasios Konstantinos | Caro-Kann Defense: Tartakower Variation | |
| Nov 27, 2025 | Drakakis | 0–1 | Gkountroumpis | Round 1: Drakakis, Georgios Th - Gkountroumpis, Ioannis | French Defense: Rubinstein Variation, Blackburne Defense | |
| Jul 12, 2025 | Gkountroumpis | ½–½ | Alexandrakis | Round 9: Gkountroumpis, Ioannis - Alexandrakis, Vasileios Sp | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Jul 8, 2025 | Kotovos | 1–0 | Gkountroumpis | Round 4: Kotovos, Konstantinos - Gkountroumpis, Ioannis | Catalan Opening: Closed | |
| Jun 28, 2024 | Gkountroumpis | * | Vallianos | Round 9: Gkountroumpis, Ioannis - Vallianos, Athanasios | ? | |
| Jun 27, 2024 | Gkountroumpis | * | Xynidis | Round 8: Gkountroumpis, Ioannis - Xynidis, Maximos | ? | |
| Jun 26, 2024 | Kakagiannis | 1–0 | Gkountroumpis | Round 7: Kakagiannis, Stylianos - Gkountroumpis, Ioannis | French Defense: Exchange Variation | |
| Jun 25, 2024 | Gkountroumpis | * | Vasileiou | Round 6: Gkountroumpis, Ioannis - Vasileiou, Konstantinos D | ? | |
| Jun 25, 2024 | Wolters | * | Gkountroumpis | Round 5: Wolters, Maximos - Gkountroumpis, Ioannis | ? | |
| Jun 24, 2024 | Gkountroumpis | * | Koutsioumpos | Round 4: Gkountroumpis, Ioannis - Koutsioumpos, Grigorios | ? | |
| Jun 23, 2024 | Ouzounstefanis | * | Gkountroumpis | Round 3: Ouzounstefanis, Nikolaos - Gkountroumpis, Ioannis | ? | |
| Jun 23, 2024 | Gkountroumpis | * | Palaiochorinos | Round 2: Gkountroumpis, Ioannis - Palaiochorinos, Ioannis | ? | |
