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18 October, 2018
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So you can save your progress and
get into the leaderboard.
Rules
The objective is to fill a 9×9 grid with digits so that
each column, each row, and each of the nine 3×3 subgrids that
compose the grid contains all of the digits from 1 to 9.
If you are having trouble, consider reading
5 steps to solve a Sudoku Puzzle.