18 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Biernacki, Mark | Pogorelskiy, Boris | 1-0 | A21 | Open Letnà Praha 2026 | 2026-08-12 |
| Biernacki, Mark | Schletter, Felix | 0-1 | D37 | Open Letnà Praha 2026 | 2026-08-09 |
| Biernacki, Mark | Jun, Rudolf | 1-0 | E62 | Open Letnà Praha 2026 | 2026-08-07 |
| Mark Biernacki | Kostya Kavutskiy | 0-1 | E66 | Round 1: Mark Biernacki - Kostya Kavutskiy | 2023-01-14 |
| Mark Biernacki | Donald Johnson | 0-1 | A37 | Round 4: Mark Biernacki - Donald Johnson | 2021-07-18 |