| Apr 20, 2026 | Stadnicki | * | Stepien | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Queen's Gambit Declined: Normal Defense | |
| Apr 19, 2026 | Stadnicki | 1–0 | Twarogiel | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Semi-Slav Defense: Marshall Gambit | |
| Apr 18, 2026 | Litwin | 0–1 | Stadnicki | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Polish Opening | |
| Apr 17, 2026 | Stadnicki | 1–0 | Miller | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Indian Defense: Anti-Nimzo-Indian | |
| Apr 17, 2026 | Olszowski | 1–0 | Stadnicki | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense: Taimanov Variation, Szén Variation | |
| Apr 16, 2026 | Stadnicki | ½–½ | Rajtar | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Queen's Gambit Declined | |
| Apr 15, 2026 | Stepien | 0–1 | Stadnicki | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Nimzo-Larsen Attack: Modern Variation | |
| Apr 15, 2026 | Stadnicki | 0–1 | Sokolowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Wade Defense | |
| Apr 14, 2026 | Twardy | 0–1 | Stadnicki | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Scotch Game: Schmidt Variation | |
| Jul 7, 2025 | Stadnicki | 0–1 | Krajewicz | XXI Baltic Pearl Chess Festival Group C | Benoni Defense: Classical Variation, Czerniak Defense | |
| Jul 4, 2025 | Szczesniak | 1–0 | Stadnicki | XXI Baltic Pearl Chess Festival Group C | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| Jul 3, 2025 | Stadnicki | ½–½ | Betkowski | XXI Baltic Pearl Chess Festival Group C | Modern Defense: Two Knights Variation, Suttles Variation | |
| Jul 2, 2025 | Shilov | 0–1 | Stadnicki | XXI Baltic Pearl Chess Festival Group C | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Jul 20, 2023 | Stadnicki | 0–1 | Bugajski | European Senior Team Chess Championship 2023 65+ | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Jul 19, 2023 | Wagner-Michel | 0–1 | Stadnicki | European Senior Team Chess Championship 2023 65+ | Bishop's Opening: Vienna Hybrid | |
| Jul 18, 2023 | Higgie | 1–0 | Stadnicki | European Senior Team Chess Championship 2023 65+ | Queen's Gambit Declined | |
| Jul 17, 2023 | Stadnicki | 1–0 | Tucker | European Senior Team Chess Championship 2023 65+ | Benoni Defense: Benoni-Indian Defense | |
| Jul 16, 2023 | Wood | 0–1 | Stadnicki | European Senior Team Chess Championship 2023 65+ | Center Game: Paulsen Attack Variation | |
| Jul 15, 2023 | Stadnicki | 0–1 | Roos | European Senior Team Chess Championship 2023 65+ | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Jul 14, 2023 | Stadnicki | 1–0 | Sobocanec | European Senior Team Chess Championship 2023 65+ | Semi-Slav Defense: Main Line | |
| Jul 13, 2023 | Olesen | 1–0 | Stadnicki | European Senior Team Chess Championship 2023 65+ | Bishop's Opening: Berlin Defense | |
| Jul 12, 2023 | Schutz | 1–0 | Stadnicki | European Senior Team Chess Championship 2023 65+ | Ruy Lopez: Berlin Defense, Kaufmann Variation | |
| Jun 18, 2023 | Pietrzak | 0–1 | Stadnicki | Mistrzostwa Polski Seniorow 2023 | Italian Game: Giuoco Pianissimo, Normal | |
| Jun 14, 2023 | Stadnicki | 0–1 | Leszner | Mistrzostwa Polski Seniorow 2023 | Queen's Pawn Game: Zukertort Variation | |
| Jun 12, 2023 | Czyz | 1–0 | Stadnicki | Mistrzostwa Polski Seniorow 2023 | Queen's Gambit Declined: Capablanca Variation | |
| — | Stadnicki | 0–1 | Sokolowski | rubinsteinE | Nimzo-Indian Defense: Normal Variation | |
| — | Stadnicki | 0–1 | Osiecki | rubinsteinE | King's Indian Defense: Orthodox Variation, Positional Defense | |
| — | Stadnicki | ½–½ | Gorecki | rubinsteinE | Queen's Gambit Declined: Ragozin Defense | |
| — | Stadnicki | 1–0 | Nowak | rubinsteinE | Queen's Gambit Accepted: Classical Defense, Rubinstein Variation | |
| — | Stadnicki | 1–0 | Chubar | rubinsteinE | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted | |
| — | Pawlak | * | Stadnicki | rubinsteinE | ? | |
| — | Chmielewski | ½–½ | Stadnicki | rubinsteinE | Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | |
| — | Kuc | 0–1 | Stadnicki | rubinsteinE | Sicilian Defense: Delayed Alapin Variation, with e6 | |
