Hone your skills by solving a grid a day with this 2024 box calendar of sudoku puzzles ranging from easy to hard, created by puzzle master Frank Longo. The rules are simple: fill in the empty squares so that every digit from 1 to 9 appears once (and only once) in every row, column, and 3 × 3 box. Answers are given on the back of the tear-off pages. On Mondays, ease into your day with easy "White Belt" puzzles; the level of difficulty slowly increases as the week goes on, leading up to tricky "Black Belt" sudoku on the weekend, when you've got extra time to take on the challenge. Features of this puzzle calendar include: Day and date reference on every page, with combined weekend pages, major and national holidays in the US, Canada, and UK, answers on the back of each tear-off page, difficulty rating for each puzzle, recyclable cardboard backing with built-in folding stand for desk or tabletop display.