18 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Duijker, Bert | Stuemer, Paul | 0-1 | E69 | Round 4: Duijker, Bert - Stuemer, Paul | 2026-08-21 |
| Duijker, Bert | Janssens, Manu | 1/2-1/2 | A88 | 20. RLP-Senioren-Open | 2023-09-13 |
| Duijker, Bert | Schulze Forsthoevel, Manfred | 1/2-1/2 | A04 | 20. RLP-Senioren-Open | 2023-09-11 |
| Duijker, Bert | Siebenhaar, Erich | 0-1 | E63 | 20. RLP-Senioren-Open | 2023-09-09 |
| Duijker, Bert | Riesenbeck, Juergen | 1/2-1/2 | D74 | 20. RLP-Senioren-Open | 2023-09-07 |
| Duijker, Bert | Okrajek, Alexander | 0-1 | E60 | Round 1: Duijker, Bert - Okrajek, Alexander | |
| Duijker, Bert | Larem, Ewald | 0-1 | E06 | Round 4: Duijker, Bert - Larem, Ewald | |
| Duijker, Bert | Bohnstorff, Michael | 0-1 | D15 | Round 5: Duijker, Bert - Bohnstorff, Michael | |
| Duijker, Bert | Schaefer, Bernd | 1/2-1/2 | A15 | Round 7: Duijker, Bert - Schaefer, Bernd | |
| Duijker, Bert | Schwab, Wolfgang | 1-0 | A30 | Round 9: Duijker, Bert - Schwab, Wolfgang |