Sudoku #m617

Sudoku game, level: Medium #617. This Sudoku have 27 given numbers (clues)..
Structure: 2 (1 pcs.), 6 (2 pcs.), 4 (2 pcs.), 7 (3 pcs.), 5 (3 pcs.), 9 (4 pcs.), 8 (4 pcs.), 3 (4 pcs.), 1 (4 pcs.), ∑27.


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