- "There's some Sudoku books, although I think... No, they're all solved."
- ―Bill Lee
Sudoku was a puzzle-based activity from Earth.
Lt. Colonel John Sheppard had some sudoku books in his living quarters. (SGA: "The Return, Part 1")
The quarters in the former Midway space station also had sudoku books, but they were all solved. (SGA: "Midway")
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