Sudoku

How to play

Fill the grid so that every row, every column and every 3×3 box contains the numbers 1 to 9 exactly once. The shaded numbers are given and can't be changed. Tap a cell, then a number; switch on Notes to pencil in candidates instead.

Shortcuts

• Arrow keys move, 1–9 place a number, Shift + number writes a note.
• N toggles notes, Z undoes, Y redoes, H asks for a hint.
• Your progress saves after every move — close the tab and come back any time.