| Country | Chess tournament name | Start | End |
|---|---|---|---|
 |
♔ Rotterdam FIDE Congress 17-19 October 2025- Open @ Klooster Oude Noorden | 2025-10-17 | 2025-10-19 |
|
♔ Rotterdam FIDE Congress 17-19 October 2025- Major Under 1900 @ Klooster Oude Noorden | 2025-10-17 | 2025-10-19 |
|
♔ Rotterdam FIDE Congress 17-19 October 2025- Minor Under 1650 @ Klooster Oude Noorden | 2025-10-17 | 2025-10-19 |
|
NBSB Pupillendag | ||
|
NK Snelschaken 2025 | 2025-09-13 | 2025-09-13 |