Free online Sudoku with no ads and no sign-up. Four difficulty levels from easy to expert, a new daily puzzle every day, pencil notes, hints, undo and error checking. Every puzzle has exactly one solution. Your game saves automatically, so you can pick it up later on your phone or desktop, and every solve counts toward the leaderboard.
How to play
Tap a cell, then tap a number. Keyboard: arrow keys move, 1-9 fill a cell, Backspace or 0 clears it, N toggles pencil notes, H gives a hint, U undoes.
New in v1.0
First release: four difficulty levels, a daily puzzle, pencil notes, hints, undo, auto-save and leaderboards for puzzles solved and fastest hard solve.
