Killer Sudoku

The sum of the digits in each dotted cage must equal to the number at the top left corner of the cage. Digits cannot repeat in a cage.

Killer is another exciting variant. The board has dotted lined polygons — called “cages”. The top left corner of each cage has a number. Killer rules below the image.

Killer

Killer rules:

  1. The number at the top left of each cage is the sum of all the digits in the cage.
  2. A digit can only appear once in each cage.
  3. Only rule 2 applies for cages without sum.

The image above is an example of a Killer puzzle.

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