| Winter 2425 |
| Groep B - Jan Piersma |
| Site | Start date | 27-8-2024 | |
| City | End date | 4-2-2025 | |
| Country | Pairing system | Round Robin | |
| Organization | Arbiters |
| Jan Piersma | |
| ID | |
| Rating | 1740 |
| Categories | |
| Nr. | White | Black | Result |
| 1 | Jan Piersma | Mieke Clausen | ½−½ |
| 2 | Jan Piersma | John Fokke | ½−½ |
| 3 | Reg Roodzant | Jan Piersma | ½−½ |
| 4 | Jan Piersma | Wim Voet | ..... |
| 5 | Hans de Jong | Jan Piersma | ..... |
| 6 | Jan Piersma | Jan van Dam | ..... |
| 7 | Sietse Spoelstra | Jan Piersma | 0−1 |
| 8 | Jan Piersma | Jaap Baalbergen | 1−0 |
| 9 | Eddy de Wit | Jan Piersma | ½−½ |
| 10 | Jan Piersma | Han de Jonge | ..... |
| 11 | Harry Koldijk | Jan Piersma | ..... |