| Apr 2, 2026 | Brandlmaier | 0–1 | Guba | Round 7: Brandlmaier, Felix - Guba, Viktor | Italian Game: Paris Defense | |
| Apr 1, 2026 | Guba | ½–½ | Geroe | Round 6: Guba, Viktor - Geroe, Leonhard | Sicilian Defense: Accelerated Dragon, Modern Variation | |
| Mar 31, 2026 | Haselsberger | * | Guba | Round 5: Haselsberger, Armin - Guba, Viktor | ? | |
| Mar 31, 2026 | Guba | * | Broederbauer | Round 4: Guba, Viktor - Broederbauer, Alexander | ? | |
| Mar 30, 2026 | Boesch | * | Guba | Round 3: Boesch, Fynn - Guba, Viktor | ? | |
| Mar 29, 2026 | Guba | 0–1 | Maier | Round 2: Guba, Viktor - Maier, Tobias | Ruy Lopez: Morphy Defense, Anderssen Variation | |
| Mar 18, 2026 | Leitgeb | ½–½ | Guba | Round 1: Leitgeb, Julian - Guba, Viktor | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Jan 3, 2026 | Kostecka | 1–0 | Guba | Round 7: Kostecka, Marika - Guba, Viktor | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Dec 31, 2025 | Guba | ½–½ | Ashwath Narayanan P | Round 4: Guba, Viktor - Ashwath Narayanan P | Sicilian Defense: Alapin Variation | |
| Dec 31, 2025 | Arndt | 1–0 | Guba | Round 5: Arndt, Uwe - Guba, Viktor | King's Indian Defense: Semi-Averbakh System | |
| Jun 21, 2025 | Guba | 1–0 | Thoeny | Round 11: Guba, Viktor - Thoeny, Hermann | Philidor Defense: Exchange Variation | |
| Jun 21, 2025 | Vrban | 1–0 | Guba | Round 10: Vrban, Damir - Guba, Viktor | King's Gambit Declined: Falkbeer Countergambit, Milner-Barry Variation | |
| Jun 21, 2025 | Guba | 1–0 | Hatzl | Round 9: Guba, Viktor - Hatzl, Johannes | Scandinavian Defense: Gubinsky-Melts Defense | |
| Jun 21, 2025 | Antoniou | 0–1 | Guba | Round 8: Antoniou, Christos - Guba, Viktor | English Opening: King's English Variation | |
| Jun 21, 2025 | Guba | 1–0 | Leonov | Round 7: Guba, Viktor - Leonov, Leonid | Four Knights Game: Gunsberg Variation | |
| Jun 21, 2025 | Guba | 0–1 | Ataiants | Round 6: Guba, Viktor - Ataiants, Igor | Three Knights Opening | |
| Jun 21, 2025 | Gerold | 1–0 | Guba | Round 5: Gerold, Alexander - Guba, Viktor | Italian Game: Two Knights Defense, Fritz Variation | |
| Jun 21, 2025 | Guba | 1–0 | Zhbanova | Round 4: Guba, Viktor - Zhbanova, Angelina | Sicilian Defense: Alapin Variation | |
| Jun 21, 2025 | Neuschmied | 1–0 | Guba | Round 3: Neuschmied, Siegfried - Guba, Viktor | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Jun 21, 2025 | Staudacher | 0–1 | Guba | Round 2: Staudacher, Karl-Heinz - Guba, Viktor | Bishop's Opening: Vienna Hybrid, Hromádka Variation | |
| Jun 21, 2025 | Guba | 0–1 | Dragnev | Round 1: Guba, Viktor - Dragnev, Valentin | Philidor Defense: Exchange Variation | |
| Apr 15, 2025 | Guba | 0–1 | Chen | Round 5: Guba, Viktor - Chen, Chicheng Leon | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Apr 15, 2025 | Fuertler | 0–1 | Guba | Round 4: Fuertler, Oliver - Guba, Viktor | Trompowsky Attack: Classical Defense, Big Center Variation | |
| Apr 14, 2025 | Guba | 0–1 | Prober | Round 3: Guba, Viktor - Prober, Raphael | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Apr 13, 2025 | Nicolussi | ½–½ | Guba | Round 2: Nicolussi, Hieronymus - Guba, Viktor | Scotch Game: Mieses Variation | |
| Jun 1, 2024 | Guba | 1–0 | Froewis | Round 11: Guba, Viktor - Froewis, Annika | Four Knights Game: Gunsberg Variation | |
| Jun 1, 2024 | Kummer | 0–1 | Guba | Round 10: Kummer, Helmut - Guba, Viktor | King's Indian Defense: Averbakh Variation, Modern Defense | |
| Jun 1, 2024 | Guba | 0–1 | Schranzhofer | Round 9: Guba, Viktor - Schranzhofer, Marco | Caro-Kann Defense: Apocalypse Attack | |
| Jun 1, 2024 | Gschiel | 1–0 | Guba | Round 8: Gschiel, Alexander - Guba, Viktor | King's Indian Defense: Petrosian Variation | |
| Jun 1, 2024 | Guba | 1–0 | Erhard | Round 7: Guba, Viktor - Erhard, Jakob | Caro-Kann Defense: Apocalypse Attack | |
| Jun 1, 2024 | Guba | 0–1 | Vrban | Round 6: Guba, Viktor - Vrban, Damir | Latvian Gambit Accepted: Main Line | |
| Jun 1, 2024 | Wohlfahrt | 1–0 | Guba | Round 5: Wohlfahrt, Herbert - Guba, Viktor | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Jun 1, 2024 | Guba | 1–0 | Mira | Round 4: Guba, Viktor - Mira, Helene | Czech Defense | |
| Jun 1, 2024 | Keferboeck | 0–1 | Guba | Round 3: Keferboeck, Jewgeni - Guba, Viktor | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Jun 1, 2024 | Kienboeck | 1–0 | Guba | Round 1: Kienboeck, Benjamin - Guba, Viktor | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Mar 28, 2024 | Guba | 0–1 | Gruenwald | Round 7: Guba, Viktor - Gruenwald, Simon | Owen Defense | |
| Mar 27, 2024 | Standhartinger | ½–½ | Guba | Round 6: Standhartinger, Joachim - Guba, Viktor | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Mar 26, 2024 | Wu | 1–0 | Guba | Round 5: Wu, Chenshan - Guba, Viktor | Indian Defense: Budapest Defense, Rubinstein Variation | |
| Mar 26, 2024 | Guba | 1–0 | Schramml | Round 4: Guba, Viktor - Schramml, Fabian | Sicilian Defense: Delayed Alapin Variation | |
| Oct 27, 2021 | Guba | * | Haselsberger | BU12 | Caro-Kann Defense: Panov Attack | |
| Oct 26, 2021 | Feiertag | * | Guba | BU12 | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Oct 25, 2021 | Guba | 0–1 | Englisch | BU12 | Sicilian Defense: Sozin Attack, Flank Variation | |
| Oct 25, 2021 | Baurecht | 0–1 | Guba | U12 Austrian Youth Championship | Sicilian Defense: Taimanov Variation | |
