41 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Marciniak, Leonard | Sanz Wawer, Daniel | 1/2-1/2 | A14 | II Liga 2026 | 2026-09-05 |
| Marciniak, Leonard | Butkiewicz, Jan | 0-1 | B30 | II Liga 2026 | 2026-09-04 |
| Marciniak, Leonard | Litner, Igor | 1-0 | B30 | II Liga 2026 | 2026-09-01 |
| Marciniak, Leonard | Kowalski, Witold | 1/2-1/2 | A14 | II Liga 2026 | 2026-08-30 |
| Marciniak, Leonard | Gbyl, Andrzej | 0-1 | A31 | Krakow B | 2024-06-26 |
| Marciniak, Leonard | Redzisz, Michal | 0-1 | B10 | IMP Mezczyzn do lat 20 | 2023-10-30 |
| Marciniak, Leonard | Haladaj, Adam | 1-0 | A31 | IMP Mezczyzn do lat 20 | 2023-10-28 |
| Marciniak, Leonard | Labedz, Dawid | 1-0 | A80 | IMP Mezczyzn do lat 20 | 2023-10-26 |
| Marciniak, Leonard | Zalega, Maciej | 0-1 | E60 | IMP Mezczyzn do lat 20 | 2023-10-25 |
| Marciniak, Leonard | Adams, Michael | 0-1 | E04 | European Rapid Chess Championship 2022 | 2022-12-17 |
| Marciniak, Leonard | Licznerski, Lukasz | 0-1 | D97 | Katowice | 2022-12-16 |
| Marciniak, Leonard | Stefaniuk, Zbigniew | 1-0 | C69 | IMP20b | 2021-12-12 |
| Marciniak, Leonard | Bojczewski, Mateusz | 1-0 | B10 | IMP20b | 2021-12-11 |
| Marciniak, Leonard | Paprocki, Antoni | 1/2-1/2 | B22 | U20 Polish Youth Championship | 2021-12-08 |
| Marciniak, Leonard | Jedrusik, Adam | 1/2-1/2 | B11 | IMP20b | 2021-12-06 |
| Marciniak, Leonard | Topola, Rafal | 0-1 | B10 | Polish Championship Qualifier | 2021-10-30 |
| Marciniak, Leonard | Bogusz, Alan | 1/2-1/2 | B51 | Polish Championship Qualifier | 2021-10-27 |
| Marciniak, Leonard | Krawczyk, Flawian | 0-1 | B51 | Polish Championship Qualifier | 2021-10-26 |
| Marciniak, Leonard | Dalkowski, Rafal | 0-1 | B11 | Polish Championship Qualifier | 2021-10-24 |