The official utterly addictive number-placing puzzle
Give your brain a workout with these all new Difficult-level
puzzles. Their addictive power will not only entertain--Su Doku
puzzles engage your mind, improve your concentration, and help you
stay mentally fit. There's no excuse for slow thinking and flabby
wits when you can train your brain!
Beware of pale imitations. These are the original and official
Su Doku puzzles by Wayne Gould--"New York Post"'s Su Doku puzzle
master and one of "Time" magazine's Most Influential People.
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