International Sudoku Day — 9 September

Attention all puzzle fanatics and math lovers! The World Puzzle Federation established International Sudoku Day on September 9, a day with tremendous symbolism for followers of the game. Sudoku, which means “single number” in Japanese, is a logic-based number puzzle in which the objective is to fill a 9×9 grid so that each column, row and 3×3 sub-grid contains all the digits from 1 to 9. 

Although Sudoku is immensely popular, it is a fairly new game. Historically, number puzzles have been around since the 19th century, but Sudoku as we know it, didn’t appear until the 1980s in Japan. The game was unknown in the West until 2004 when Sudoku became a regular feature in newspapers.  There’s  even an annual competition. It seems we just can’t get enough of it!

When?
5 months from now
9 September
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