Killer Sudoku

Fill the 9×9 grid using standard Sudoku rules and the small sum shown in each dashed cage. The cages add another layer of logic to every placement.

Sudoku
Difficulty Killer
Mistakes
0/3
Time
00:00

How Killer Sudoku cages work

  1. Every row, column and 3×3 box contains 1 through 9 exactly once.
  2. Digits in a cage add to its displayed target. Do not repeat a digit inside a cage.
  3. Use the sum to narrow candidates before placing a number. The digits of a complete row, column or box total 45.

For example, a two-cell cage summing to 3 can only contain 1 and 2. Its order depends on the crossing rows, columns and boxes.

Killer Sudoku cage combinations

These examples use distinct digits; their order within the cage can vary.

Cage sizeSumPossible digits
2 cells31 + 2
2 cells41 + 3
2 cells167 + 9
2 cells178 + 9
3 cells61 + 2 + 3
3 cells71 + 2 + 4
3 cells236 + 8 + 9
3 cells247 + 8 + 9