6 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Mathijssen, Koen | Sven Bruls | 1-0 | B90 | Round 8: Mathijssen, Koen - Sven Bruls | 2026-08-04 |
| Mathijssen, Koen | Vogels, Mathijs | 0-1 | C01 | Round 6: Mathijssen, Koen - Vogels, Mathijs | 2026-08-03 |
| Mathijssen, Koen | Winter, Sven | 0-1 | B06 | Round 4: Mathijssen, Koen - Winter, Sven | 2026-08-01 |