Kakuro puzzles resemble crosswords which use numbers instead of words. The aim of the game is to fill all the blank squares in the grid with only the numbers 1-9 so that the numbers you enter add up to the corresponding clues. When the grid is filled, the puzzle is complete.
Kakuro is easier than it looks and doesn't really involve a lot of maths, it's more about logical deduction and reasoning. It's a lot of fun too - if you like Sudoku then you'll probably like Kakuro too!
It is very important to note that a proper Kakuro puzzle has only 1 unique solution, and it will always have a logical way of reaching it, there should be no guesswork needed.
Kakuro.com features a completely free online Kakuro game where you can play unlimited puzzles as well as Sudoku, "Killer" Sudoku, Sudoku-X and more!