About the game
The number puzzle everybody knows: nine rows, nine columns, nine boxes, and each holds 1 to 9 once. Four difficulties from a relaxed warm-up to expert puzzles that need real technique, a new puzzle of the day for everyone, notes, undo and hints that explain themselves.
Rules
Fill the grid so that every row, every column and every 3×3 box holds each number from 1 to 9 exactly once.
Every puzzle has exactly one solution, so it can always be found by reasoning, without guessing. A number that breaks a rule turns red.
How to play
- Tap a cell, then a number below the board (or type it).
- Every row, column and 3×3 box holds 1 to 9 once.
- Not sure? Switch on notes and pencil in the options.
- Languages
- EN · DE
- Works on
- Phone, tablet, computer
- Players
- Just you