![]() ![]() In contrast, this book concentrates on how to solve sudoku puzzles. Most of these start with a few pages of explanation and hints for solution, and then present a large collection of puzzles to be solved. This book differs from other sudoku books. This is not an arithmetical puzzle, but rather a logic one, requiring only logical thinking, perseverance and patience. In spite of the appearance of numbers in these puzzles, no knowledge of maths is required. Given a 9 x 9 grid divided into nine 3 x 3 mini-grids (boxes) and with some numbers already placed in it, fill in the rest of the grid in such a way that no number appears twice in the same row, column or box. Much of the reason for its popularity stems from the fact that the basic rules are so very simple. Like the Rubik cube a generation earlier, it has succeeded in catching the imagination of young and old alike, and is used in schools to teach logical thinking. Like other puzzles based on a square grid (such as crosswords and chess problems), a sudoku puzzle can be easy, or it can be a challenge to test the most committed of puzzlers.
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