Sudoku row and column feedback
Visual feedback when you complete a full row, column, or 3×3 block correctly.
About this Sudoku page
Completing a unit triggers a short highlight animation so progress feels tangible.
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.