What is Sudoku? Sudoku is a fun Latin Square derivative puzzle in which each row, column, and 3x3 sub-square contains the numbers 1-9 without repeating. You can find a much more detailed and exhaustive explanation on Wikipedia
Where did it start? Well, according to the previous link, it actually started in 1979 by an American named Howard Garns. However, it didn't become popular until 1986 in Japan and not until 2005 internationally. It's now a fixture in many daily newspapers including the NYTimes and my local paper the Palo Alto Daily.
How do I play? Each row, column, and 3x3 sub-square can contain the numbers 1 thru 9 onc. The goal of the game is to complete all the empty squares by logically deducing the missing numbers. Note: the key is to LOGICALLY arrive at the missing numbers and not simply guess at them. There are various strategies you can employ to this end. Read the Sudoku Strategy Guide to find out more.
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