Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9. The regions bordered with a dotted line are called "cages". The sum of all numbers in a cage has to be equal to the small number in its bottom left corner. No number may appear twice in a cage.
Killer Sudoku #1 - easy
Killer Sudoku #2 - easy
Killer Sudoku #3 - medium
Killer Sudoku #4 - medium
Killer Sudoku #5 - hard
Killer Sudoku #6 - hard
Killer Sudoku #7 - evil
Killer Sudoku #8- evil
Variants — Special Killer Sudokus
These Killer Sudokus have irregular and/or additional coloured regions.
Meaningful sizes vary between 6x6 and 16x16. Some puzzles do not have block regions like this 7x7 Killer Sudoku below.