| 31 ago 2026 | Magkalakis, Stefanos 2347 | Theodoridis, Charalampos 2109 | ½-½ | C49 Apertura de los Cuatro Caballos: Spanish Variation, Nimzowitsch Variation | 19th Kalamaria International 2026 | Group A | 87 | Ver |
| 30 ago 2026 | Theodoridis, Charalampos 2109 | Kazakos, Markos 2304 | ½-½ | D44 Defensa Semieslava: Botvinnik Variation | 19th Kalamaria International 2026 | Group A | 20 | Ver |
| 8 jul 2026 | Gkavardinas, Antonios 2304 | Theodoridis, Charalampos 2132 | 1-0 | C50 Apertura Italiana: Giuoco Pianissimo | 53rd Greek Team Championship 2026 | 45 | Ver |
| 6 jul 2026 | Theodoridis, Charalampos 2132 | Anagnostopoulos, Panagiotis 2058 | 1-0 | D94 Defensa Grünfeld: Three Knights Variation, Burille Variation | 53rd Greek Team Championship 2026 | 44 | Ver |
| 25 jun 2026 | Nunez Gregoire, Daniel 2353 | Theodoridis, Charalampos 2132 | ½-½ | D37 Gambito de Dama rehusado: Three Knights Variation | FIDE World Youth Chess Championships 2026 | O16 | 24 | Ver |
| 20 jun 2026 | Talgatov, Nazar 2365 | Theodoridis, Charalampos 2132 | 1-0 | C70 Apertura Española (Ruy López): Morphy Defense, Cozio Defense | FIDE World Youth Chess Championships 2026 | O16 | 97 | Ver |
| 19 jun 2026 | Theodoridis, Charalampos 2132 | Basha, Lir 2003 | ½-½ | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | FIDE World Youth Chess Championships 2026 | O16 | 49 | Ver |
| 18 jun 2026 | Zhauynbay Aldiyar 2318 | Theodoridis, Charalampos 2132 | 1-0 | C72 Apertura Española (Ruy López): Morphy Defense, Modern Steinitz Defense | FIDE World Youth Chess Championships 2026 | O16 | 113 | Ver |
| 16 jun 2026 | Korchynskyi, Mykola 2432 | Theodoridis, Charalampos 2132 | 1-0 | E44 Defensa Nimzoindia: St. Petersburg Variation, American Variation | FIDE World Youth Chess Championships 2026 | O16 | 58 | Ver |
| 20 abr 2026 | Theodoridis, Charalampos 2074 | Mantazis, Georgios Rafail 2114 | ½-½ | A41 Defensa Rata: English Rat | Greek Youth U16 Individual Championship Finals 2026 | Open U16 | 33 | Ver |
| 20 abr 2026 | Theodoridis, Charalampos 2074 | Palaiologou, Apostolos 2085 | ½-½ | E14 Defensa India de Dama: Spassky System | Greek Youth U16 Individual Championship Finals 2026 | Open U16 | 64 | Ver |
| 17 abr 2026 | Tselepis, Ioannis 2062 | Theodoridis, Charalampos 2074 | ½-½ | C45 Apertura Escocesa: Romanishin Variation | Greek Youth U16 Individual Championship Finals 2026 | Open U16 | 34 | Ver |
| 9 abr 2026 | Katsanis, Vasileios Dim 2369 | Theodoridis, Charalampos 2074 | 1-0 | E35 Defensa Nimzoindia: Classical Variation, Noa Variation | Greek Youth U16 Individual Championship Finals 2026 | Open U16 | 76 | Ver |
| 18 feb 2026 | Theodoridis, Charalampos 2100 | Ioannidis, Evgenios 2469 | 0-1 | E44 Defensa Nimzoindia: St. Petersburg Variation, American Variation | 9th Vardaris Open 2026 | 27 | Ver |
| 30 nov 2025 | Theodoridis, Charalampos 2108 | Ntounias, Ioannis 2089 | ½-½ | A28 Apertura Inglesa: Four Knights System, Nimzowitsch Variation | 17th Greek Youth Team Championship 2025 | 69 | Ver |
| 29 nov 2025 | Katsanis, Vasileios Dim 2336 | Theodoridis, Charalampos 2108 | 1-0 | E73 Defensa India de Rey: Semi-Averbakh System | 17th Greek Youth Team Championship 2025 | 23 | Ver |
| 28 nov 2025 | Theodoridis, Charalampos 2108 | Balafoutas, Alexandros 2009 | 1-0 | E73 Defensa India de Rey: Normal Variation, Standard Development | 17th Greek Youth Team Championship 2025 | 27 | Ver |
| 25 nov 2025 | Kazantzoglou, Stefanos 2212 | Theodoridis, Charalampos 2108 | 1-0 | A07 Ataque Indio de Rey | 17th Greek Youth Team Championship 2025 | 37 | Ver |
| 29 oct 2025 | kiladze, Luka 2370 | Theodoridis, Charalampos 2082 | 1-0 | A46 Defensa India: London System | European Youth Chess Championship 2025 | U16 | 63 | Ver |