The following introductory video, which contains a sample problem and solution, explains how KenKen puzzles work.

**Rules of KenKen**

Use the numbers 1 to *n* to fill an *n* × *n* grid — for instance, use the numbers 1, 2, 3 and 4 to fill a 4 × 4 grid — according to the following rules:

- Every row and column must contain each number exactly once.
- The numbers in each heavily outlined set of squares, called a
*cage*, must combine (in any order) to produce the target number using the mathematical operation indicated. - A number may be repeated within a cage, as long as it is not in the same row or column.

The solution to the puzzle will be unique.

**Puzzles on This Page**

This page is updated with four new puzzles daily. Each puzzle has different characteristics.

| | A 4 × 4 grid, using only addition. |

| | A 4 × 4 grid, using only addition and subtraction. |

| | A 4 × 4 grid, using addition, subtraction, multiplication and division. |

| | A 6 × 6 grid, using addition, subtraction, multiplication and division |

Select one of these types under "Today's Puzzles." Solutions to the previous day's puzzles appear under "Yesterday's Solutions."