Practise sudoku #4 - Position Sums
Position Sums has become a favorite type for Richard to write. The possibilities for entries in this type seem endless.
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Online Puzzle and Sudoku Competitions
This is the competition page of the Dutch puzzle association WCPN.
In 2026, the Dutch Puzzle and Sudoku Championships will take place once again, organized by WCPN and ORTEC. The championships consist of two parts:
- The online qualifications will be held from Friday March 6th 2026 (12.00 pm CET) until Tuesday March 10th 2026 (11.59 pm CET)
- Live Championships: Saturday, 18 April 2026, at ORTEC in Zoetermeer