4 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Koelmans, Jan Willem | Zecha, Oscar | 0-1 | E46 | Round 3: Koelmans, Jan Willem - Zecha, Oscar | 2025-12-23 |
| Koelmans, Jan Willem | Nobbe, Lars | 1/2-1/2 | E81 | Round 1: Koelmans, Jan Willem - Nobbe, Lars | 2024-05-12 |
| Koelmans, Jan Willem | Elferink, Leon | 1/2-1/2 | D04 | Round 3: Koelmans, Jan Willem - Elferink, Leon | 2024-05-12 |