Easy Sudoku

7 5 2 1 4 9 8
4 3 6 8 2 9 1
9 1 8 7 5 4 2
2 6 5 9 3 8 1 7 4
3 8 7 4 6 1 5 9
1 4 2 5 7 8 3
1 5 9 3 2
2 3 7 4 6
7 9 1 8 2 3 4
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Medium Sudoku

3 5 1 2 7 9 6
9 1 8
9 1 2 5
1 4 3 6 2 9
2 4 9 3 5 1
5 6 1 2 8 7 4
2 7 4 1 5 8 3
1 7 9 4 6 2
4 5 2 6 9 1 7
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Hard Sudoku

5 9 3 7 1
8 3 2 7
1 5 8 3 2
9 2 1 7 5 6
8 1 2 5
1 2
2 8 9 6 7 3 5
4 8 2 7 1
1 9 5 2 8 6
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Very Hard Sudoku

1 2 9 6 7 3
8 6 1 9
3 8 2
2 9 1 6
6 9 4 3 2
3 2 6 9
8 3 6
2 6 5
1 3 4
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Insane Sudoku

9 5
4 8
4 2
7 1 4
4 9
2 1 4 7 6 3 9
1 3 6 8 9 4 7
9
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