KenKen is a puzzle game that is very similar to sudoku. However, instead of 9 3x3 boxes in one big box, there is just one big square, of varying possible dimensions. The dimensions of the box are determined by the highest possible number in the box (a high number of six would lead to a 6x6 box). Once you have the box you simply follow all the rules in sudoku, except it's just one big box (no number in the same row or column as another number of same value). After that, it gets different. Instead of just filling in the rows and columns there are little boxes of varying shapes with a number and a mathematical operation in the corner. The goal is to arrange the numbers inside to equal the final number using the mathematical operation. You can put the numbers in whatever order you like, just as long as you get the final product (if it has a minus, a 5 and 1 is the same as a 1 and a 5). So, your goal is to fill in the big square like a sudoku square, but to also satisfy the little boxes. The below puzzle is an example of a KenKen puzzle, with the answer being the bottom link in the sources box. For more info go to http://www.kenken.com.