The real deal. From Nikoli, the Japanese company that helped launch the Sudoku craze and gave the game its name, this calendar provides fanatics the challenge they crave with a daily puzzle in full color. And new this year, test your Sudoku mettle once a month with a Visual Sudoku puzzle, in which the numbers have been replaced by symbols or images. Starting off easy each weekend, the puzzles increase in difficulty over the course of the week-- puzzles handcrafted, literally, by masters who anticipate your every move. Can you stay one step ahead?