A killer sudoku calculator is an online tool that can help you solve killer sudoku puzzles. Killer sudoku puzzles are a variant of sudoku that include an additional constraint: the sum of the numbers in each cage must equal the number in the top-left corner of the cage.
Killer sudoku calculators can be a valuable tool for solving these puzzles, as they can help you to quickly identify the possible values for each cell and to eliminate impossible values. There are a number of different killer sudoku calculators available online, and each one has its own unique features and benefits.