Logic puzzle Sudoku
Pure logic — no guessing required for well-formed puzzles with unique solutions.
About this Sudoku page
Our generator aims for uniquely solvable grids at each difficulty tier.
FAQ
Everything you need to enjoy Sudoku with calm, focused play.
How do I play Sudoku online?+
Fill each row, column, and 3×3 box with digits 1 to 9 exactly once. Tap or click a cell, then choose a number from the keypad.
Is an account required to play Sudoku?+
No. You can start immediately in your browser without creating an account.