| Mar 22, 2026 | Onopriienko | 0–1 | Nagly | IV Dolnoslaska Liga Juniorow 2026 | Queen's Indian Defense: Miles Variation | |
| Mar 22, 2026 | Onopriienko | ½–½ | Pienio | IV Dolnoslaska Liga Juniorow 2026 | Indian Defense: Anti-Nimzo-Indian | |
| Mar 21, 2026 | Onopriienko | 0–1 | Przygodzka | IV Dolnoslaska Liga Juniorow 2026 | Dutch Defense: Hopton Attack | |
| Mar 21, 2026 | Szymczak | 0–1 | Onopriienko | IV Dolnoslaska Liga Juniorow 2026 | Caro-Kann Defense | |
| Mar 21, 2026 | Onopriienko | 1–0 | Trendel | IV Dolnoslaska Liga Juniorow 2026 | Slav Defense: Quiet Variation, Schallopp Defense | |
| Oct 4, 2025 | Swiderski | 1–0 | Onopriienko | MP-rapid25 | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| — | Onopriienko | 0–1 | Witczak | Memorial Adolfa Anderssena 2025 | King's Indian Defense: Normal Variation, King's Knight Variation | |
| — | Onopriienko | 1–0 | Sikora | Memorial Adolfa Anderssena 2025 | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| — | Onopriienko | 0–1 | Solecki | Memorial Adolfa Anderssena 2025 | Benoni Defense: Old Benoni | |
| — | Onopriienko | 0–1 | Zarczuk | Memorial Adolfa Anderssena 2025 | Queen's Pawn Game: London System | |
| — | Onopriienko | 0–1 | Milczarek | Memorial Adolfa Anderssena 2025 | Queen's Gambit Declined: Harrwitz Attack | |
| — | Onopriienko | 0–1 | Stachniak | Round 1: Onopriienko, Mariia - Stachniak, Stanislaw | ? | |
| — | Onopriienko | 1–0 | Karas | Round 3: Onopriienko, Mariia - Karas, Kacper | Zukertort Opening: Sicilian Invitation | |
| — | Onopriienko | 0–1 | Belau | Round 6: Onopriienko, Mariia - Belau, Tomasz | ? | |
| — | Onopriienko | 0–1 | Marek Gorny | Round 8: Onopriienko, Mariia - Marek Gorny | ? | |
| — | Onopriienko | 0–1 | Szczurek | D10 | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| — | Onopriienko | ½–½ | Karcz | D10 | Slav Defense: Three Knights Variation | |
| — | Onopriienko | 1–0 | Rozek | D10 | Grünfeld Defense: Three Knights Variation, Hungarian Attack | |
| — | Onopriienko | 1–0 | Czerwinska | D10b | Queen's Pawn Game: Zukertort Variation | |
| — | Onopriienko | 1–0 | Pienio | D10b | Indian Defense: Anti-Nimzo-Indian | |
| — | Onopriienko | 1–0 | Pawlowska | D10b | Queen's Pawn Game: Chigorin Variation | |
| — | Onopriienko | 0–1 | Grzeszczyk | D10b | Queen's Gambit Declined: Three Knights Variation | |
| — | Onopriienko | 1–0 | Switalska | D10b | Queen's Gambit Declined: Semi-Tarrasch Defense | |
| — | Onopriienko | 1–0 | Plocharczyk | D10b | King's Indian Defense: Normal Variation, King's Knight Variation | |
| — | Kowalski | 1–0 | Onopriienko | Memorial Adolfa Anderssena 2025 | Caro-Kann Defense: Two Knights Attack | |
| — | Kostic | 1–0 | Onopriienko | Memorial Adolfa Anderssena 2025 | Pirc Defense: Austrian Attack | |
| — | Huchla | ½–½ | Onopriienko | Memorial Adolfa Anderssena 2025 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| — | Jacek Gorny | 1–0 | Onopriienko | Round 2: Jacek Gorny - Onopriienko, Mariia | Zukertort Opening: Sicilian Invitation | |
| — | Semp | 1–0 | Onopriienko | Round 5: Semp, Szymon - Onopriienko, Mariia | ? | |
| — | Hermans | 0–1 | Onopriienko | Round 7: Hermans, Jan - Onopriienko, Mariia | ? | |
| — | Lebek | 1–0 | Onopriienko | Round 9: Lebek, Janusz - Onopriienko, Mariia | ? | |
| — | Oledzka | ½–½ | Onopriienko | D10 | Caro-Kann Defense: Exchange Variation | |
| — | Cyboran | 0–1 | Onopriienko | D10 | Caro-Kann Defense: Exchange Variation | |
| — | Przewlocka | ½–½ | Onopriienko | D10 | Caro-Kann Defense: Advance Variation | |
| — | Bos | 1–0 | Onopriienko | D10b | Caro-Kann Defense: Advance Variation, Short Variation | |
| — | Szczurek | 0–1 | Onopriienko | D10b | Caro-Kann Defense: Exchange Variation | |
| — | Karcz | 1–0 | Onopriienko | D10b | Caro-Kann Defense: Classical Variation | |
| — | Zelazny | 0–1 | Onopriienko | D10b | Caro-Kann Defense: Hillbilly Attack | |
| — | Taradajko | 1–0 | Onopriienko | D10b | King's Indian Defense: Fianchetto Variation, Yugoslav System | |
| — | Przewlocka | 1–0 | Onopriienko | D10b | Caro-Kann Defense: Advance Variation, Short Variation | |