Undo

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10 December, 2018

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### Leaderboard

john doe | 53s | |

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andy2018 | 1188s |

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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.