The Ultimate Sum Sudoku Challenge
🚧 Coming Soon! Our interactive Killer Sudoku game is currently in development. In the meantime, learn the rules and strategies below to master this challenging variant.
Practice advanced solving techniques with our most challenging puzzles
Killer Sudoku combines the logic of traditional Sudoku with the arithmetic challenge of Kakuro. Also known as "Sum Sudoku" or "Addoku," this variant adds an extra layer of complexity that makes it one of the most popular Sudoku variations worldwide.
In Killer Sudoku, groups of cells called "cages" are outlined and must sum to a specific number. You must fill the grid following standard Sudoku rules while ensuring each cage adds up to its target sum, with no repeated digits within the same cage.
Yes, Killer Sudoku is generally more challenging because you must satisfy both the standard Sudoku rules and the arithmetic constraints of the cages.
Basic addition skills are helpful, but most solving relies on logical deduction rather than complex calculations. Learning common combinations is more important than math speed.
No, each cage must contain unique digits. This is one of the fundamental rules that makes Killer Sudoku challenging and interesting.
Start with the smallest cages and look for unique combinations. Practice with easier puzzles to learn common number patterns before tackling harder challenges.
