Killer Sudoku Solver

Enter the numbered cages of a 9×9 Killer Sudoku puzzle and solve it automatically. Standard Sudoku rules apply, and digits inside a cage must add to its target without repeating.

Puzzle grid

Select squares to make a cage, then enter its total using the nearby controls. For printed digits, switch to Given numbers.

0 of 81 cells in cages0 cages
Load the example or start creating cages.

Import / export cages

For quicker entry, paste each cage on its own line. Format: 10: A1 A2 A3 (rows A–I, columns 1–9).

Enter cages or digits

Tap adjacent squares, enter the sum, and save. Tap an existing cage to change or remove it.

No cells selected

Tap a square, then choose its printed number (if any). You can also type 1–9 on a keyboard; use 0 or Delete to erase.

Reference image

Optional: keep a screenshot of your puzzle alongside the editor while copying cages and sums.

User uploaded puzzle reference

The screenshot is a visual reference; this version does not automatically read cage lines or numbers from images.

How to solve

  1. Load the sample or create cages across all 81 squares.
  2. Enter the total shown in the top-left of each cage.
  3. If your puzzle has additional given digits, enter those too.
  4. Click Solve puzzle and reveal the completed grid.

The solver checks cage sums, distinct cage digits and Sudoku row, column and 3×3 box rules. Extremely underconstrained puzzles may have more than one solution or require more time.