Randomly generated KenKen puzzles, from a gentle 3 × 3 to a tough 9 × 9. Choose the size, the difficulty and the operations, and every puzzle is checked to have exactly one solution.
Fill every row and every column with the numbers 1 to N, each exactly once. On a 6 × 6 board that is 1 to 6.
The bold outlines are cages. The numbers in a cage must make the target in its corner using the operation shown.
Subtraction and division cages always have two cells, and the order does not matter. A one-cell cage just gives you its number.
A number can repeat inside a cage, as long as it is not in the same row or column twice. Every puzzle has exactly one solution.