Sudoku #m228

Sudoku game, level: Medium #228. This Sudoku have 27 given numbers (clues)..
Structure: 9 (2 pcs.), 8 (2 pcs.), 1 (3 pcs.), 3 (3 pcs.), 4 (3 pcs.), 5 (3 pcs.), 7 (3 pcs.), 2 (4 pcs.), 6 (4 pcs.), ∑27.


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