Killer Sudoku — Quick rules
Goal of the game
Fill the grid with the digits 1–9. As in standard Sudoku, each digit appears once in every row, column and 3×3 box. On top of that, the digits in each cage must add up exactly to the target shown. Every DIGIGMA puzzle has a logical solution, so you never need to guess.
Rules
- Standard Sudoku rules still apply: 1–9 appear once in every row, column and 3×3 box.
- The digits in each cage must add up exactly to the number shown.
- A digit cannot repeat within the same cage.
For example, a two-cell cage totalling 8 cannot be 4 + 4: both digits in a cage must be different.