22 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kosiorek, Marek | Lach, Aleksandra | 1-0 | B27 | Open-1 | 2025-06-02 |
| Kosiorek, Marek | Raszka, Janusz | 1-0 | C13 | Open-1 | 2025-06-02 |
| Kosiorek, Marek | Wolak, Maciej | 1-0 | B50 | Open-1 | 2025-05-31 |
| Kosiorek, Marek | Bachor, Tomasz | 1-0 | B50 | Open-1 | 2025-05-31 |
| Kosiorek, Marek | Siedlinski, Piotr | 1-0 | B40 | Open-1 | 2025-05-31 |
| Kosiorek, Marek | Musial, Igor | 1-0 | B50 | Open-1 | 2025-05-31 |
| Kosiorek, Marek | Zakrzewski, Marek | 1/2-1/2 | B31 | 1liga2 | 2024-09-21 |
| Kosiorek, Marek | Mika, Tomasz | 0-1 | B12 | 1liga2 | 2024-09-19 |
| Kosiorek, Marek | Borgula, Rafal | 1/2-1/2 | B28 | 1liga2 | 2024-09-17 |
| Kosiorek, Marek | Paszewski, Mateusz | 0-1 | B50 | 1liga2 | 2024-09-15 |
| Kosiorek, Marek | Levitan, Caleb Levi | 1/2-1/2 | A13 | open-a | 2022-07-29 |