34 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Hackner, Oskar Anton | Dzwierzynski, Bartosz | 1-0 | E06 | II Liga 2026 | 2026-09-06 |
| Hackner, Oskar Anton | Mikula, Michal | 1-0 | A62 | II Liga 2026 | 2026-09-02 |
| Hackner, Oskar Anton | Ugorek, Kacper | 1/2-1/2 | A36 | II Liga 2026 | 2026-08-31 |
| Hackner, Oskar Anton | Steczek, Marcin | 1-0 | A15 | DRU?YNOWE MISTRZOSTWA POLSKI II LIGA 2026 - Mecze 12-23 | 2026-08-29 |
| Hackner, Oskar Anton | Sabuk, Piotr | 1/2-1/2 | E00 | II liga 2026 | 2026-08-23 |
| Hackner, Oskar Anton | Betkowski, Andrzej | 1/2-1/2 | B06 | new tournament description | 2026-04-19 |
| Hackner, Oskar Anton | Zysko, Jan | 1-0 | A15 | new tournament description | 2026-04-17 |
| Hackner, Oskar Anton | Gabka, Pawel | 1-0 | D11 | new tournament description | 2026-04-14 |
| Hackner, Oskar Anton | Baran, Franciszek | 1-0 | D36 | new tournament description | 2026-04-13 |
| Hackner, Oskar Anton | Krajewicz, Pawel | 1/2-1/2 | E09 | new tournament description | 2026-04-11 |
| Hackner, Oskar Anton | Markiewicz, Jerzy | 1-0 | E05 | 2 liga 2025 2 | 2025-09-06 |
| Hackner, Oskar Anton | Krzewski, Dariusz | 1-0 | D11 | 2liga_2025_3 | 2025-09-03 |
| Hackner, Oskar Anton | Kutowski, Marcel | 1-0 | A25 | 2 liga 2025 2 | 2025-09-01 |
| Hackner, Oskar Anton | Boryna, Szymon | 1-0 | A20 | Rubinstein Chess Festival 2025 - OPEN A | |
| Hackner, Oskar Anton | Przybylski, Jan | 0-1 | D34 | Rubinstein Chess Festival 2025 - OPEN A | |
| Hackner, Oskar Anton | Standowicz, Mateusz | 0-1 | E67 | Rubinstein Chess Festival 2025 - OPEN A | |
| Hackner, Oskar Anton | Domanski, Wiktor | 1-0 | D11 | Rubinstein Chess Festival 2025 - OPEN A | |
| Hackner, Oskar Anton | Wandor, Adam | 1-0 | D11 | Rubinstein Chess Festival 2025 - OPEN A |