6 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Kooijmans, Jermo | Mazajchik, Tim | 0-1 | A13 | Round 5: Kooijmans, Jermo - Mazajchik, Tim | 2026-06-28 |
| Kooijmans, Jermo | Kools, Thomas | 1/2-1/2 | A14 | HSG Open 2026 A | 2026-06-21 |
| Kooijmans, Jermo | Grooten, Herman | 0-1 | A30 | HSG Open 2026 A | 2026-06-21 |
| Kooijmans, Jermo | Van de Griendt, Jan Willem | 1/2-1/2 | A34 | Round 6: Kooijmans, Jermo - Van de Griendt, Jan Willem | 2026-05-17 |
| Kooijmans, Jermo | Cardon, Helmut | 1-0 | A13 | Round 5: Kooijmans, Jermo - Cardon, Helmut | 2025-12-13 |