This programs helps you solve existing KaKuRo puzzles as well as create new ones. KaKuRo (or Cross Sums) is a puzzle that is solved much like a crossword puzzle, using digits instead of letters. Where an entry in a regular crossword may form a word, the digits in a Cross Sums entry add up to a sum. The sums, or clues, are embedded in a shaded square of the puzzle. The top right number is the across sum while the bottom right number is a down sum. Only the digits 1 through 9 are used and no digit may appear more than once in any sum. The object of the puzzle is to insert a digit from 1 to 9 inclusive into each non-shaded cell such that the sum of the numbers in each entry matches the sum associated with it and that no digit is duplicated in any entry. This version is the first release on CNET Download.com.