Sudoku #m712

Sudoku game, level: Medium #712. This Sudoku have 23 given numbers (clues)..
Structure: 2 (1 pcs.), 6 (1 pcs.), 4 (2 pcs.), 3 (2 pcs.), 7 (3 pcs.), 1 (3 pcs.), 9 (3 pcs.), 5 (4 pcs.), 8 (4 pcs.), ∑23.


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