Easy Sudoku

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

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

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

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

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