Hard Sudoku
Fewer givens and trickier chains — you'll be leaning on your pencil marks.
hard00:00
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Press New game for another hard grid
Every hard puzzle here is generated with a guaranteed unique solution — there’s always exactly one right answer, so you never have to guess. Tap New game for a fresh one, or use Hint to see the next logical step explained. Want to solve a puzzle from a newspaper? Try the solver.