| Competition nameSGK Kerst 2025 |
| Group 1 - Gert Kalkhoven |
| Site | Start date | 23-12-2025 | |
| City | End date | 23-12-2025 | |
| Country | Netherlands | Pairing system | Swiss |
| Organization | Schaakgroep Koedijk | Arbiters |
| Gert Kalkhoven | |
| ID | |
| Rating | 0 |
| Categories | |
| Nr. | White | Black | Result |
| 1 | Han van Os | Gert Kalkhoven | 0−1 |
| 2 | Jan van Dam | Gert Kalkhoven | 0−1 |
| 3 | Gert Kalkhoven | Paul Roomer | 0−1 |
| 4 | Albert Erkamp | Gert Kalkhoven | 0−1 |
| 5 | Gert Kalkhoven | André Buter | ½−½ |
| 6 | Gert Kalkhoven | Jaap Baalbergen | 0−1 |
| 7 | Jan Piersma | Gert Kalkhoven | 1−0 |
| 8 | Gert Kalkhoven | Koos Hoogland | 1−0 |
| 9 | Arno Vrins | Gert Kalkhoven | 0−1 |