Maintain Your Brain Kakuro looks like a Crossword puzzle, but solves like a Sudoku puzzle using the numbers 1-9 instead of letters. Clues given are the sum of numbers in a grid going Across or Down.Sound easy? Wait until you try to solve one of my Masochist level puzzles.If you find Sudoku easy to solve, then you'll love the challenge these 99 Kakuro puzzles provide and their ability to Maintain Your Brain.More than a dozen different grid shapes, and puzzles progress from easy at the beginning to Masochist at the end. Happy Puzzling, Ted.