List the few digit combinations that can make a small cage sum.
English
Numbers inside gentle cages
Play Killer Sudoku
online for free.
Play Killer Sudoku online
Difficulty
6 × 6 cages
Filled22Errors0
Cage totals are shown in each cage's first cell.
Game introduction
What is Killer Sudoku?
Killer Sudoku adds outlined cages to familiar Sudoku logic. Digits cannot repeat in any row, column, box or cage, and the digits inside each cage must add to its small target number.
The compact 6×6 format uses digits 1 through 6 and 2×3 boxes. Each new puzzle changes the solution, cage layout and starting clues while preserving a valid completed grid.
- Category
- Numbers
- Difficulty
- Easy–Hard
- Typical game
- 6–16 min
How to play
How to play Killer Sudoku
- Fill each cell with a digit from 1 to 6.
- Use every digit once in each row, column and 2×3 box.
- Make the cells in every outlined cage add to its target.
- Switch difficulty or choose New puzzle for a different generated grid.
A little help
Killer Sudoku tips
Use row and column restrictions to decide which cage cell gets each digit.
A one-cell cage gives its value immediately.
Check boxes that contain several nearly complete cages first.
Good to know
Killer Sudoku Frequently asked questions
Is Killer Sudoku free to play online?
Yes. You can play the full Killer Sudoku game free in your browser with no account, subscription or download.
How is Killer Sudoku different from classic Sudoku?
Killer Sudoku keeps the row, column and box rules, then adds cages whose digits must reach a target sum without repeating.
Do I need arithmetic skills?
Only simple addition is needed. Most progress comes from combining small cage sums with normal Sudoku elimination.
Can I play Killer Sudoku on a phone or tablet?
Yes. The game is designed for touch screens as well as mouse controls, with keyboard controls included where they suit the puzzle.