How to play
Sudoku
Place 1–9 once in every row, column, and box.
Use the given digits to narrow every square until the grid has one consistent answer.
Play online
Read, reason, then move
How to play
- Place the digits 1–9 exactly once in every row.
- Place the digits 1–9 exactly once in every column and every 3×3 box.
- Given digits cannot change; optional notes can hold uncertain candidates.
- Conflicts appear immediately, but every entry remains undoable.
Choose a fresh board