Sudoku with pencil notes
Mark candidates with notes mode, then commit digits when you are sure.
About this Sudoku page
Toggle notes to pencil-mark candidates in empty cells — essential for harder puzzles.
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.