The challenge of the contemporary world is linked to the search for new forms of entertainment that make sense and are fun at the same time that ensure the learning of something. Games become an option to try to accomplish this challenge in a world where the mobile phone plays an increasingly important role. In this sense, this book is dedicated to investigate and analyze the sudoku game, checking the types of reasoning that appear during such a game, as well as its relationship with the so necessary logical reasoning, we will also bring notions of mathematical knowledge that can be learned through the use of the game.