Not 6x6

What is the Not 6x6 rule?

Not 6x6 is a variant sudoku rule: this puzzle uses a digit set other than 1–6 (e.g. 5x5, 7x7, 9x9, or a non-standard digit range).

In every puzzle here the setter’s own rules text is shown beside the board, so the exact wording for the puzzle you are solving is always one glance away. All normal sudoku rules apply unless the setter says otherwise.