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Sudoku
Fill every row, column, and 3×3 box with the digits 1–9.
Easy
Medium
Hard
5
3
8
2
7
1
5
4
5
3
1
7
6
3
2
8
6
5
9
4
3
9
7
Notes OFF
Undo
1
7
2
7
3
5
4
7
5
5
6
7
7
6
8
7
9
7
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