For sudoku fans looking for a new puzzle to delight and challenge them, Will Shortz, the crossword editor of The New York Times and America’s puzzlemaster, presents kakuro. If you’ve never tried these deceptively simple-looking puzzles, get set: Millions of puzzlers around the globe are already hooked! The object is quite simple: Place a single digit from 1 to 9 in each white square of a crossword-like grid. A clue number, shown in a shaded square, represents the sum of the digits to be placed in the white squares to the right of it (for an Across answer) or beneath it (for a Down answer). No digit is repeated within an answer. Like sudoku, kakuro is a crossword puzzle using numbers. The only skills needed to solve a kakuro puzzle are addition and subtraction (no other math), and a good sense of logic. So pick up your pencil and get ready to see if you can kakuro!