Variant playground

Killer Sudoku

Killer Sudoku combines classic regions with arithmetic cages. Use the cage totals to narrow candidates before placing digits.

Related Sudoku variants

These pages cover related formats and alternate names for this puzzle type.

Sum Sudoku Sum Sudoku uses Killer Sudoku cage totals to narrow candidates before filling the classic Sudoku grid. Sudoku X Sudoku X adds both long diagonals as extra regions, so every digit must appear once on each diagonal as well as in every row, column, and box. Mini Sudoku Mini Sudoku keeps the same logic in a compact grid, making it useful for fast practice or newer players. Sudoku Variants Browse Sudoku X, Killer Sudoku, Mini Sudoku, Samurai Sudoku, and related formats.