Hard Sudoku

Today's board starts with Hard selected. Check the date on the game and use the difficulty control whenever you want another level.

Make room for a deliberate solve

Choose Hard when you want to spend time investigating a grid. Keep a record of the deduction behind each candidate removal so you can retrace it if you meet a contradiction.

The stuck guide provides a review routine. If you pause midway, use the focus guide to leave a useful restart note.

Prefer to solve on paper?

Open Hard printable Sudoku for automatic downloads in A4 or US Letter. Check the pack's date coverage before comparing it with today's board: the weekly pack covers a previous week.

Choose your next session

Easy · Medium · Expert · Master

The difficulty guide explains the available levels. For questions about your pace, read how solving times vary. You do not need to beat a time limit to try another level.