Universal Kakuro by Number Puzzles, Inc.
Available for print / Web / mobile
Kakuro is a cross between traditional crosswords and Sudoku. The idea behind Kakuro is very simple. Just like Sudoku, you must fit the numbers 1 to 9 into a grid of squares so that no number is repeated within a defined area. And just like a crossword, there's a grid of filled blocks and clues to solve.
Kakuro puzzles are best solved using logic. Some of the same logic can be used as in Sudoku, but you also need a bit of math because with Kakuro there is a second constraint: Not only must the numbers not repeat within a clue run, they also must add up to given totals -- these totals replace traditional word clues found in a crossword.
The clues and answer sequences run both horizontal and vertical in each 14x14 grid. And, like many daily puzzles, the difficulty increases throughout the week.
Number Puzzles, Inc.
Meet the Cast of Universal Kakuro
Print Sample | Online Sample