Daily Sudoku
Today’s puzzle — 2026-08-01. Pencil marks, mistake checking, and hints that explain the logic. Free, no sign-up, works offline once loaded.
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How to play
Fill the grid so every row, every column, and every 3×3 box contains the digits 1 to 9 exactly once. Click a cell and type a number, or use the on-screen pad. Turn on Notes to pencil in candidates, tap Check to flag mistakes, and Hint to reveal the next logical step and why it works.
Hints that teach, not just tell
The hint button doesn’t just fill a cell — it names the technique. A “naked single” is a cell where only one digit can go; a “hidden single” is a digit that fits only one cell in its row, column, or box. Learning to spot those two is most of what makes Sudoku click. Stuck on a puzzle you found elsewhere? Paste it into the Sudoku solver.