24 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Siwek, Leon | Wcislo, Piotr | 1-0 | C55 | II DMP Juniorow 2026 | 2026-05-29 |
| Siwek, Leon | Lisek, Adam | 1-0 | C56 | II DMP Juniorow 2026 | 2026-05-26 |
| Siwek, Leon | Kowalski, Maciej | 1-0 | B13 | II DMP Juniorow 2026 | 2026-05-22 |
| Siwek, Leon | Wajda, Krzysztof | 1/2-1/2 | B00 | II DMP Juniorow 2026 | 2026-05-20 |
| Siwek, Leon | Gorecki, Michal | 1/2-1/2 | B23 | MWJ | 2025-06-14 |
| Siwek, Leon | Mikula, Mateusz | 1-0 | B12 | MWJ | 2025-06-13 |
| Siwek, Leon | Mrozik, Igor | 1/2-1/2 | B50 | MWJ | 2025-06-12 |
| Siwek, Leon | Felis, Maksymilian | 1/2-1/2 | B13 | MWJ | 2025-06-11 |
| Siwek, Leon | Adamski, Ksawery | 0-1 | E73 | xd | 2024-06-03 |
| Siwek, Leon | Nowak, Feliks | 0-1 | B75 | xd | 2024-05-31 |
| Siwek, Leon | Przybylski, Bartosz | 0-1 | B90 | Festiwal Poznanski | 2023-08-24 |
| Siwek, Leon | Sprzeczka, Emilia | 0-1 | B73 | open a | |
| Siwek, Leon | Glatty, Zbigniew | 0-1 | C56 | open a |