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Sudoku

Place digits 1–9 so every row, column, and box is unique.

  • Puzzle
  • Solo
  • Tap or keyboard
How to play
  1. Fill the 9×9 grid so every row, column and 3×3 box contains each digit from 1 to 9 exactly once.
  2. The given digits are fixed and cannot be changed.
  3. Use notes to pencil in candidate digits for a cell.
  4. The puzzle is complete when every cell holds the correct digit.

Controls

  • Tap or click a cell, then type a digit or use the on-screen number pad. Backspace or Delete clears it.
  • Arrow keys move between cells.
  • N toggles notes mode; Shift+digit or Alt+digit writes a single note.
  • H asks for a hint, P or Space pauses, Escape closes overlays.
  • Ctrl/⌘+Z undoes, Ctrl/⌘+Y redoes, Ctrl/⌘+N starts a new puzzle.

Tips

  • Look for a digit that fits only one cell in a row, column or box.
  • Hints are staged: the first press points at a region, later presses reveal more.