SudokuVariants

Killer

Killer sudoku adds killer cages to sudoku grid. Each cage has a number which tells us sum of the digits in the cage. Digits within a cage cannot repeat.

Killer

In the image above we can conclude that digit outside the box in cage with sum 22 is 1 because we can sum all digits in the three cages and they add to 46, and sum of all cells in a box must be 45 (1+2+3+4+5+6+7+8+9).

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Variants