Retrieve a Sudoku Game
positive integer < 30, how many days ago? or NULL for the most recently published game.
http://www.sudoku.org.uk/DailySudoku.asp and retrieves
the sudoku game from
day days ago. Based on a function from a
related sudoku package,
sudoku::fetchSudokuUK with minor changes.
The published sudoku game as a sudoku object.
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