ADVANCED VARIANT · KILLER
Killer Sudoku Online
Killer Sudoku combines classic row, column and 3×3-box logic with arithmetic cages. Every cell belongs to one connected cage, cage digits cannot repeat, and their values must total the displayed sum.
Killer Sudoku rules
Use digits 1 through 9 once in every row, column and classic box. Inside each gold cage, digits are distinct and add to the small target number.
How to begin
Start with small cages and extreme totals. A two-cell cage totaling 3 must contain 1 and 2, while a two-cell cage totaling 17 must contain 8 and 9.
Uniqueness is proved
The generator validates cage coverage, connectedness, target sums and the final solution, then runs the cage-aware solver until exactly one solution is proved.
Saved and offline ready
Hints, undo, redo, the timer and the active Killer grid save on your device. The root-scoped offline worker caches the game after first load.