| Apr 20, 2026 | Olszowski | * | Wesolowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense: French Variation, Open | |
| Apr 19, 2026 | Plesiuk | ½–½ | Olszowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Dutch Defense: Rubinstein Variation | |
| Apr 18, 2026 | Olszowski | 0–1 | Kawula | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | French Defense: Winawer Variation, Delayed Exchange Variation | |
| Apr 17, 2026 | Siewert | 1–0 | Olszowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense: Closed | |
| Apr 17, 2026 | Olszowski | 1–0 | Stadnicki | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense: Taimanov Variation, Szén Variation | |
| Apr 16, 2026 | Pawlak | 0–1 | Olszowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense | |
| Apr 15, 2026 | Olszowski | 0–1 | Gasik | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Alekhine Defense: Modern Variation, Alburt Variation | |
| Apr 15, 2026 | Ocytko | ½–½ | Olszowski | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Apr 14, 2026 | Olszowski | 1–0 | Chromicz | Indywidualne Mistrzostwa Polski Seniorow 2026 - grupa 65+ | Philidor Defense: Exchange Variation | |
| Feb 9, 2025 | Hadrian | 0–1 | Olszowski | Open B | Rapport-Jobava System | |
| Feb 8, 2025 | Gola | 1–0 | Olszowski | Open B | Alekhine Defense: Scandinavian Variation | |
| Feb 7, 2025 | Olszowski | ½–½ | Osada | Open B | Dutch Defense: Hopton Attack | |
| Feb 6, 2025 | Olszowski | ½–½ | Linek | Open B | Queen's Pawn Game: Colle System, Anti-Colle | |
| Feb 6, 2025 | Klama | 0–1 | Olszowski | Open B | Sicilian Defense: Open | |
| Feb 5, 2025 | Domoradzki | 1–0 | Olszowski | B | Sicilian Defense: Grand Prix Attack | |
| Feb 4, 2025 | Olszowski | ½–½ | Makarec | B | Indian Defense: London System | |
| Feb 4, 2025 | Olszowski | ½–½ | Owczarek | B | Sicilian Defense: French Variation, Westerinen Attack | |
| Feb 3, 2025 | Huchwajda | 0–1 | Olszowski | B | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jul 13, 2022 | Olszowski | 1–0 | Chubar | ESCC 65+ Lublin 2022 | Queen's Pawn Game: Modern Defense | |
| Jul 12, 2022 | Hewson | 1–0 | Olszowski | ESCC 65+ Lublin 2022 | Semi-Slav Defense: Accelerated Meran Variation | |
| Jul 11, 2022 | Olszowski | 0–1 | Chapman | ESCC 65+ Lublin 2022 | Queen's Pawn Game | |
| Jul 10, 2022 | Gasik | 0–1 | Olszowski | ESCC 65+ Lublin 2022 | Caro-Kann Defense: Accelerated Panov Attack, Open Variation | |
| Jul 9, 2022 | Borowik | 0–1 | Olszowski | ESCC 65+ Lublin 2022 | Sicilian Defense: Modern Variations | |
| Jul 8, 2022 | Olszowski | ½–½ | Scowen | ESCC 65+ Lublin 2022 | Zukertort Opening: Queen's Gambit Invitation | |
| Jul 7, 2022 | Neumann | 1–0 | Olszowski | ESCC 65+ Lublin 2022 | English Opening: Great Snake Variation | |
| Jul 5, 2022 | Olszowski | 0–1 | Wagner-Michel | ESCC 65+ Lublin 2022 | Queen's Pawn Game: Accelerated London System | |
| — | Olszowski | * | Rotkiewicz | rubinsteinE | ? | |
| — | Olszowski | 1–0 | Kawula | rubinsteinE | French Defense: Schlechter Variation | |
| — | Czepczynski | 1–0 | Olszowski | rubinsteinE | English Opening: Symmetrical Variation, Rubinstein Variation | |
| — | Bernat | 1–0 | Olszowski | rubinsteinE | Benoni Defense: Czech Benoni Defense | |
