Puzzles Killer Sudoku

Killer Sudoku (also known as Sums Sudoku, Sums Number Place, Sumdoku, Sumoku, Addoku, Samunamupure, Kikagaku Nampure)

Killer Sudoku is a logic-based number puzzle that blends classic Sudoku with arithmetic. The grid looks like standard Sudoku, but is divided into dotted “cages,” each showing a required sum. Digits 1–9 must not repeat in any row, column, block, or cage while also matching the cage totals. Players use both elimination and sum-combination reasoning, making the puzzle more strategic and rewarding than regular Sudoku. The variety of alternative names reflects its international popularity, especially the Japanese term “Samunamupure,” derived from “sum number place.” Killer Sudoku is ideal for solvers who enjoy deeper logic challenges and mental arithmetic.

Enjoy free Killer Sudoku puzzles online — solve sum-based logic challenges anytime and boost your brainpower!