Sudoku #m854

Sudoku game, level: Medium #854. This Sudoku have 27 given numbers (clues)..
Structure: 4 (2 pcs.), 5 (2 pcs.), 7 (2 pcs.), 8 (2 pcs.), 1 (3 pcs.), 6 (3 pcs.), 9 (3 pcs.), 3 (4 pcs.), 2 (6 pcs.), ∑27.


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