Every row
Place each number from 1 to 9 once in each horizontal row. No repeats.
Sudoku
Classic 9 × 9A little focus. A little discovery. Your next aha moment.
Getting your puzzle ready…
A FEW SIMPLE RULES
A little logic goes a long way.
Fill the grid with the numbers 1 to 9. The numbers already on the board are your starting clues — they stay right where they are.
Every column
The same goes from top to bottom: each column needs one of every number.
Every little box
Each of the nine outlined 3 × 3 boxes also needs the numbers 1 to 9.
A good place to start: look for a row, column, or box that’s almost full. Check what’s missing, then use the crossing rows and columns to narrow it down.
Playing with a keyboard
Use the arrow keys to move between squares and 1–9 to enter a number. Delete, Backspace, or 0 clears a square. N toggles notes; Ctrl+Z or Cmd+Z undoes your last move. Tab moves between the board and game controls.