18 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kozlowicz, Leonard | Kurczewski, Borys | 0-1 | B28 | II DMP Juniorow | 2025-06-23 |
| Kozlowicz, Leonard | Woskowiak, Maksymilian | 1-0 | C44 | MWJ | 2025-06-15 |
| Kozlowicz, Leonard | Slotala, Jan | 0-1 | C44 | MWJ | 2025-06-14 |
| Kozlowicz, Leonard | Szlendak, Wojciech | 0-1 | B30 | MWJ | 2025-06-13 |
| Kozlowicz, Leonard | Andralojc, Mieszko | 1/2-1/2 | E24 | MWJ | 2025-06-12 |
| Kozlowicz, Leonard | Dobrzycki, Adam | 1-0 | C44 | MWJ | 2025-06-11 |
| Kozlowicz, Leonard | Czajkowski, Radoslaw | 1-0 | A00 | MP Dzieci do lat 8 | 2023-05-07 |
| Kozlowicz, Leonard | Sternik, Filip | 0-1 | C48 | MP Dzieci do lat 8 | 2023-05-06 |
| Kozlowicz, Leonard | Ponikowski, Witold | 0-1 | C13 | MP Dzieci do lat 8 | 2023-05-05 |
| Kozlowicz, Leonard | Bekala, Franciszek | 0-1 | B20 | MP Dzieci do lat 8 | 2023-05-03 |