A growing number of people are showing that they’re “hip to be square,” thanks to a simple-seeming-yet, at times, deceptively difficult-number puzzle that’s quickly becoming one of America’s national pastimes.
Sudoku is a number-based brain teaser that requires no math skills-just a bit of logic and deduction. Although variations have been introduced in recent years, sudoku is most frequently a 9×9 grid, filled with a few “starter” numbers.
The goal is to fill in the empty cells, one number in each, so that each column, row and 3×3 region contains the numbers 1 through 9 exactly once. Each number in the solution therefore occurs only once in each of three “directions,” hence the puzzle’s name, from the Japanese words su (“number”) and doku (“single”).
Originally called simply Number Place, the first sudoku was created by Howard Garnes, a freelance puzzle constructor, in 1979. Decades later, it’s still wildly popular, with millions of people gearing up for the challenge each day.
Sudoku is even moving beyond puzzle books and newspapers, now appearing on...
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