| Jun 20, 2026 | Theodorou | 0–1 | Xu | Round 10: Theodorou, Nikolas - Xu, Xiangyu | East Indian Defense | |
| Jun 20, 2026 | Nie | 0–1 | Theodorou | Round 9: Nie, Xinyang - Theodorou, Nikolas | King's Indian Defense: Fianchetto Variation | |
| Jun 20, 2026 | Theodorou | 1–0 | Bottazzi | Round 8: Theodorou, Nikolas - Bottazzi, Ulysse | East Indian Defense | |
| Jun 20, 2026 | Andreikin | 0–1 | Theodorou | Round 7: Andreikin, Dmitry - Theodorou, Nikolas | Zukertort Opening | |
| Jun 20, 2026 | Theodorou | 1–0 | Chen | Round 6: Theodorou, Nikolas - Chen, Jonathan | Semi-Slav Defense | |
| Jun 20, 2026 | Gao | 0–1 | Theodorou | Round 5: Gao, Rui - Theodorou, Nikolas | Scandinavian Defense: Gubinsky-Melts Defense | |
| Jun 20, 2026 | Theodorou | ½–½ | Anand | Round 4: Theodorou, Nikolas - Anand, Viswanathan | ? | |
| Jun 20, 2026 | Theodorou | 1–0 | Peng | Round 3: Theodorou, Nikolas - Peng, Hongchi | East Indian Defense | |
| Jun 19, 2026 | Ivanchuk | 1–0 | Theodorou | Round 12: Ivanchuk, Vasyl - Theodorou, Nikolas | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Jun 19, 2026 | Liu | 1–0 | Theodorou | Round 11: Liu, Yan - Theodorou, Nikolas | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Jun 19, 2026 | Theodorou | ½–½ | Batsuren | Round 10: Theodorou, Nikolas - Batsuren, Dambasuren | Queen's Gambit Declined: Ragozin Defense | |
| Jun 18, 2026 | Sindarov | 1–0 | Theodorou | Round 8: Sindarov, Javokhir - Theodorou, Nikolas | Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | |
| Jun 18, 2026 | Artemiev | ½–½ | Theodorou | Round 7: Artemiev, Vladislav - Theodorou, Nikolas | English Opening: Agincourt Defense, Bogoljubow Defense | |
| Jun 18, 2026 | Theodorou | 1–0 | Chigaev | Round 6: Theodorou, Nikolas - Chigaev, Maksim | Caro-Kann Defense: Breyer Variation | |
| Jun 18, 2026 | Andreikin | 1–0 | Theodorou | Round 5: Andreikin, Dmitry - Theodorou, Nikolas | Old Indian Defense: Two Knights Variation | |
| Jun 17, 2026 | Theodorou | 1–0 | Ding | Round 4: Theodorou, Nikolas - Ding, Liren | Queen's Gambit Declined: Ragozin Defense | |
| Jun 17, 2026 | Erigaisi Arjun | ½–½ | Theodorou | Round 3: Erigaisi Arjun - Theodorou, Nikolas | English Opening: Agincourt Defense | |
| Jun 17, 2026 | Theodorou | 0–1 | Niemann | Round 2: Theodorou, Nikolas - Niemann, Hans Moke | Queen's Indian Defense: Kasparov-Petrosian Variation | |
| Jun 17, 2026 | Theodorou | ½–½ | Shimanov | Round 1: Theodorou, Nikolas - Shimanov, Aleksandr | Italian Game: Classical Variation, Giuoco Pianissimo, with a6 | |
| Jun 15, 2026 | Erigaisi Arjun | 1–0 | Theodorou | Round 9: Erigaisi Arjun - Theodorou, Nikolas | Petrov's Defense: Classical Attack, Mason-Showalter Variation | |
| Jun 14, 2026 | Theodorou | 1–0 | Abdusattorov | Round 8: Theodorou, Nikolas - Abdusattorov, Nodirbek | Bogo-Indian Defense: Retreat Variation | |
| Jun 13, 2026 | Vidit | 1–0 | Theodorou | Round 7: Vidit, Santosh Gujrathi - Theodorou, Nikolas | Queen's Pawn Game: Zukertort Variation | |
| Jun 12, 2026 | Theodorou | 0–1 | Mamedyarov | Round 6: Theodorou, Nikolas - Mamedyarov, Shakhriyar | Queen's Gambit Accepted: Central Variation, Greco Variation | |
| Jun 11, 2026 | Carlsen | 1–0 | Theodorou | Round 2: Carlsen, Magnus - Theodorou, Nikolas | Vienna Game: Mieses Variation | |
| Jun 11, 2026 | Theodorou | 1–0 | Wang | Round 9: Theodorou, Nikolas - Wang, Yanbin | Queen's Gambit Declined: Ragozin Defense | |
| Jun 11, 2026 | Yakubboev | ½–½ | Theodorou | Round 5: Yakubboev, Nodirbek - Theodorou, Nikolas | Queen's Gambit Accepted: Central Variation, Modern Defense | |
| Jun 10, 2026 | Theodorou | 0–1 | Vokhidov | Round 4: Theodorou, Nikolas - Vokhidov, Shamsiddin | Queen's Gambit Declined: Three Knights Variation | |
| Jun 9, 2026 | Theodorou | ½–½ | Nepomniachtchi | Round 3: Theodorou, Nikolas - Nepomniachtchi, Ian | Queen's Gambit Declined: Three Knights Variation | |
| Jun 8, 2026 | Madaminov | 1–0 | Theodorou | Round 2: Madaminov, Mukhiddin - Theodorou, Nikolas | Petrov's Defense: Modern Attack, Center Attack | |
| Jun 7, 2026 | Theodorou | 1–0 | Niemann | Round 1: Theodorou, Nikolas - Niemann, Hans Moke | Semi-Slav Defense: Stoltz Variation, Shabalov Attack | |
| May 10, 2026 | Bykov | 0–1 | Theodorou | Hungarian Superleague 2025/26 | ? | |
| May 9, 2026 | Grigoriants | ½–½ | Theodorou | Hungarian Superleague 2025/26 | Indian Defense: Przepiorka Variation | |
| Mar 25, 2026 | Indjic | 1–0 | Theodorou | 2026 Chesscom Open Play In 4 | King's Indian Defense: Normal Variation, Rare Defenses | |
| Mar 25, 2026 | Grandelius | 0–1 | Theodorou | 2026 Chesscom Open Play In 4 | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| Mar 25, 2026 | Theodorou | 0–1 | So | 2026 Chesscom Open Play In 4 | Semi-Slav Defense | |
| Mar 25, 2026 | Makhnev | 0–1 | Theodorou | 2026 Chesscom Open Play In 4 | King's Indian Defense: Normal Variation | |
| Mar 25, 2026 | Theodorou | 0–1 | Murzin | 2026 Chesscom Open Play In 4 | Catalan Opening: Closed | |
| Mar 25, 2026 | Tsydypov | 0–1 | Theodorou | 2026 Chesscom Open Play In 4 | Four Knights Game: Spanish Variation, Rubinstein Variation | |
| Mar 25, 2026 | Theodorou | 1–0 | Grebnev | 2026 Chesscom Open Play In 4 | Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack | |
| Mar 23, 2026 | Seemann | 1–0 | Theodorou | 2026 Chesscom Open Play In 3 | Owen Defense | |
| Mar 23, 2026 | Theodorou | 0–1 | Caruana | 2026 Chesscom Open Play In 3 | Semi-Slav Defense | |
| Mar 23, 2026 | Maksimovic | ½–½ | Theodorou | 2026 Chesscom Open Play In 3 | English Defense | |
| Mar 23, 2026 | Theodorou | 1–0 | Terry | 2026 Chesscom Open Play In 3 | Queen's Gambit Accepted: Classical Defense, Russian Gambit | |
| Mar 23, 2026 | Dubov | 1–0 | Theodorou | 2026 Chesscom Open Play In 3 | Owen Defense | |
| Mar 23, 2026 | Theodorou | 1–0 | Mahdavi | 2026 Chesscom Open Play In 3 | Catalan Opening: Closed | |
| Mar 23, 2026 | Vaibhav | 0–1 | Theodorou | 2026 Chesscom Open Play In 3 | Owen Defense | |
| Mar 23, 2026 | Theodorou | 1–0 | Steinberg | 2026 Chesscom Open Play In 3 | Slav Defense: Geller Gambit | |
| Mar 23, 2026 | Tsydypov | ½–½ | Theodorou | 2026 Chesscom Open Play In 3 | Owen Defense | |
| Mar 18, 2026 | Theodorou | ½–½ | Artemiev | 2026 Chesscom Open Play In 2 | Catalan Opening: Closed | |
| Mar 18, 2026 | Andreikin | ½–½ | Theodorou | 2026 Chesscom Open Play In 2 | English Defense | |
| Mar 18, 2026 | Samunenkov | 0–1 | Theodorou | 2026 Chesscom Open Play In 2 | Owen Defense | |
| Mar 18, 2026 | Theodorou | 1–0 | Movahed | 2026 Chesscom Open Play In 2 | Queen's Pawn Game: Symmetrical Variation | |
| Mar 18, 2026 | Indjic | 1–0 | Theodorou | 2026 Chesscom Open Play In 2 | English Defense | |
| Mar 18, 2026 | Theodorou | 1–0 | Gordievsky | 2026 Chesscom Open Play In 2 | Dutch Defense: Hopton Attack | |
| Mar 18, 2026 | Grandelius | 0–1 | Theodorou | 2026 Chesscom Open Play In 2 | English Defense | |
| Mar 18, 2026 | Theodorou | 1–0 | Steinberg | 2026 Chesscom Open Play In 2 | Bogo-Indian Defense: Retreat Variation | |
| Mar 18, 2026 | Bachmann | 1–0 | Theodorou | 2026 Chesscom Open Play In 2 | Owen Defense | |
| Mar 16, 2026 | Theodorou | ½–½ | Maghsoodloo | 2026 Chesscom Open Play In 1 | Catalan Opening: Closed | |
| Mar 16, 2026 | Vokhidov | ½–½ | Theodorou | 2026 Chesscom Open Play In 1 | Owen Defense | |
| Mar 16, 2026 | Theodorou | 0–1 | Bortnyk | 2026 Chesscom Open Play In 1 | Indian Defense: Wade-Tartakower Defense | |
| Mar 16, 2026 | So | ½–½ | Theodorou | 2026 Chesscom Open Play In 1 | Owen Defense | |
| Mar 16, 2026 | Theodorou | 1–0 | Terry | 2026 Chesscom Open Play In 1 | Kangaroo Defense | |
| Mar 16, 2026 | Theodorou | ½–½ | Vogel | 2026 Chesscom Open Play In 1 | Queen's Gambit Accepted: Classical Defense, Russian Gambit | |
| Mar 16, 2026 | Nepomniachtchi | ½–½ | Theodorou | 2026 Chesscom Open Play In 1 | Owen Defense | |
| Mar 16, 2026 | Ohanyan | 0–1 | Theodorou | 2026 Chesscom Open Play In 1 | English Defense | |
| Mar 16, 2026 | Theodorou | 1–0 | Samunenkov | 2026 Chesscom Open Play In 1 | Semi-Slav Defense | |
| Feb 8, 2026 | Theodorou | 0–1 | Eljanov | 1. BL Pauli | Catalan Opening: Open Defense, Classical Line | |
| Feb 7, 2026 | Bluebaum | ½–½ | Theodorou | 1. BL Pauli | King's Indian Defense: Normal Variation, Rare Defenses | |
| Jan 11, 2026 | Volokitin | 1–0 | Theodorou | Schachbundesliga Saison 2025/2026 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Jan 10, 2026 | Theodorou | 0–1 | Duda | Schachbundesliga Saison 2025/2026 | Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan | |
| Dec 30, 2025 | Theodorou | 0–1 | Daneshvar | World Blitz 2025 Open | Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation | |
| Dec 30, 2025 | Henriquez Villagra | 0–1 | Theodorou | World Blitz 2025 Open | Owen Defense | |
| Dec 30, 2025 | Theodorou | 0–1 | Santos Latasa | World Blitz 2025 Open | Bogo-Indian Defense: Retreat Variation | |
| Dec 30, 2025 | Lobanov | ½–½ | Theodorou | World Blitz 2025 Open | English Defense | |
| Dec 30, 2025 | Mendonca | ½–½ | Theodorou | World Blitz 2025 Open | Zukertort Opening: Quiet System | |
| Dec 29, 2025 | Theodorou | ½–½ | Nogerbek | World Blitz 2025 Open | Catalan Opening: Closed | |
| Dec 29, 2025 | Khubukshanov | 0–1 | Theodorou | World Blitz 2025 Open | Owen Defense | |
| Dec 29, 2025 | Theodorou | ½–½ | Hong | World Blitz 2025 Open | Catalan Opening: Closed | |
| Dec 29, 2025 | Gokerkan | ½–½ | Theodorou | World Blitz 2025 Open | Owen Defense | |
| Dec 29, 2025 | Theodorou | 0–1 | Duda | World Blitz 2025 Open | Catalan Opening: Open Defense | |
| Dec 29, 2025 | Galaviz Medina | 0–1 | Theodorou | World Blitz 2025 Open | English Defense | |
| Dec 29, 2025 | Theodorou | ½–½ | Klukin | World Blitz 2025 Open | Catalan Opening: Open Defense | |
| Dec 29, 2025 | Raja Rithvik R | ½–½ | Theodorou | World Blitz 2025 Open | Zukertort Opening | |
| Dec 29, 2025 | Praggnanandhaa R | 1–0 | Theodorou | World Blitz 2025 Open | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 29, 2025 | Theodorou | 1–0 | Mamedov | World Blitz 2025 Open | Pseudo Queen's Indian Defense | |
| Dec 29, 2025 | Theodorou | 0–1 | Bortnyk | World Blitz 2025 Open | Pseudo Queen's Indian Defense | |
| Dec 29, 2025 | Suleimen | 0–1 | Theodorou | World Blitz 2025 Open | Sicilian Defense: Kalashnikov Variation | |
| Dec 28, 2025 | Theodorou | 1–0 | Harshavardhan G B | World Blitz 2025 Open | Bogo-Indian Defense: Grünfeld Variation | |
| Dec 28, 2025 | Theodorou | ½–½ | Zverev | WRBC 2025 Rapid Open | Queen's Pawn Game: Symmetrical Variation | |
| Dec 28, 2025 | Pranav Anand | ½–½ | Theodorou | WRBC 2025 Rapid Open | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 28, 2025 | Theodorou | ½–½ | Ahmad | WRBC 2025 Rapid Open | Catalan Opening: Open Defense | |
| Dec 28, 2025 | Amar | ½–½ | Theodorou | WRBC 2025 Rapid Open | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 27, 2025 | Theodorou | 1–0 | Begmuratov | WRBC 2025 Rapid Open | Bogo-Indian Defense: Retreat Variation | |
| Dec 27, 2025 | Raja Harshit | ½–½ | Theodorou | WRBC 2025 Rapid Open | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 27, 2025 | Theodorou | ½–½ | Rapport | WRBC 2025 Rapid Open | Horwitz Defense | |
| Dec 27, 2025 | Tsaruk | 0–1 | Theodorou | WRBC 2025 Rapid Open | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Dec 26, 2025 | Theodorou | 0–1 | Erdogmus | WRBC 2025 Rapid Open | Zukertort Opening | |
| Dec 26, 2025 | Sindarov | 1–0 | Theodorou | WRBC 2025 Rapid Open | Sicilian Defense: O'Kelly Variation, Réti System | |
| Dec 26, 2025 | Theodorou | ½–½ | Nepomniachtchi | WRBC 2025 Rapid Open | King's Indian Attack | |
| Dec 26, 2025 | Theodorou | 1–0 | Mamedov | WRBC 2025 Rapid Open | Queen's Gambit Declined | |