F Sudoku Trivia

Most people think Sudoku is some kind of ancient Japanese game, but it's not. Although similar puzzles can be traced to 19th-century French magazines, most experts credit retired American architect Howard Garns with the invention of modern Sudoku. Number Place, as it was known at the time, was first published in the United States in 1979 by Dell Magazines.

Android Sudoku (see Figure 3.1, on the next page) will also offer a few hints to take some of the grunt work out of puzzle solving. At one extreme, it could just solve the puzzle for you, but that wouldn't be any fun, would it? So, we have to balance the hints against the challenge and not make it too easy.

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