The World's Most Difficult Sudoku Only Play If You're an Expert with 200+ Very Hard Puzzles, Paperback/Puzzle Therapist

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Contributor(s):Author: Puzzle Therapist Why should you spend time completing Sudoku? Because of the benefits, of course When you play, you stimulate your mind to think both logically and creatively. Eventually, you don't just improve your number skills but your entire thinking process too. When you're older, playing Sudoku helps keep the brain sharp and active. Begin the Sudoku habit today.