| Sep 13, 2025 | Betsakos | 0–1 | Kalogridis | Round 7: Betsakos, Konstantinos - Kalogridis, Antonios | Dutch Defense: Hopton Attack | |
| Sep 13, 2025 | Stankovic | 1–0 | Betsakos | Round 2: Stankovic, Milos - Betsakos, Konstantinos | Trompowsky Attack | |
| Mar 3, 2025 | Trimitzios | ½–½ | Betsakos | Round 7: Trimitzios, Petros - Betsakos, Konstantinos | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Feb 27, 2025 | Akin | 1–0 | Betsakos | Round 1: Akin, Mehmet Efe - Betsakos, Konstantinos | Zukertort Opening: Sicilian Invitation | |
| Aug 13, 2024 | Tsakona | ½–½ | Betsakos | Round 9: Tsakona, Maria - Betsakos, Konstantinos | Catalan Opening: Closed, Botvinnik Variation | |
| Aug 7, 2024 | Mastrovasilis | 1–0 | Betsakos | Round 3: Mastrovasilis, Athanasios - Betsakos, Konstantinos | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Aug 8, 2021 | Betsakos | * | Theoharidis | 30th OPEN Chess International Tournament | ? | |
| Aug 7, 2021 | Papadopoulos | 1–0 | Betsakos | 30th OPEN Chess International Tournament | English Opening: Anglo-Indian Defense, Romanishin Variation | |
| Aug 6, 2021 | Betsakos | * | Makridis | 30th OPEN Chess International Tournament | ? | |
| Aug 5, 2021 | Sirigos | * | Betsakos | 30th OPEN Chess International Tournament | ? | |
| Aug 4, 2021 | Betsakos | ½–½ | Klimentov | 30th OPEN Chess International Tournament | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| Aug 3, 2021 | Mixakis | * | Betsakos | 30th OPEN Chess International Tournament | ? | |
| Aug 2, 2021 | Betsakos | * | Levitan | 30th OPEN Chess International Tournament | ? | |
| Aug 2, 2021 | Spyropoulos | 1–0 | Betsakos | 30th OPEN Chess International Tournament | Caro-Kann Defense: Advance Variation, Short Variation | |
| Aug 1, 2021 | Betsakos | * | Kostov | 30th OPEN Chess International Tournament | ? | |
| — | Betsakos | 0–1 | Poon | Round 1: Betsakos, Konstantinos - Poon, Pak Yu | Rapport-Jobava System | |
| — | Betsakos | 1–0 | Petridis | Round 2: Betsakos, Konstantinos - Petridis, Dimitrios Panagiotis | Catalan Opening: Open Defense, Classical Line | |
| — | Betsakos | 0–1 | Papageorgiou | Round 5: Betsakos, Konstantinos - Papageorgiou, Ioannis | Queen's Pawn Game: London System | |
| — | Ouzounis | 0–1 | Betsakos | Round 3: Ouzounis, Konstantinos Kyr - Betsakos, Konstantinos | Bogo-Indian Defense: Grünfeld Variation | |
| — | Skodras | 1–0 | Betsakos | Round 4: Skodras, Marios Konstantinos - Betsakos, Konstantinos | Zukertort Opening: Nimzo-Larsen Variation | |
