15 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Den Boer, Lennard | Kasprzak, Lukasz | 0-1 | B22 | Wro - A | 2022-08-06 |
| Den Boer, Lennard | Demski, Michal | 1-0 | C55 | Wro - A | 2022-08-01 |
| Den Boer, Lennard | Kowalczyk, Wojciech | 1-0 | B22 | Wro - A | 2022-07-31 |
| Den Boer, Lennard | Grossmann, Ryszard | 1-0 | B14 | anderssen2021 | 2021-07-31 |
| Den Boer, Lennard | Dowgird, Filip | 1/2-1/2 | B07 | anderssen2021 | 2021-07-31 |
| Den Boer, Lennard | Zerebiec, Maurycy | 1-0 | C02 | anderssen2021 | 2021-07-31 |