Sudoku #m847

Sudoku game, level: Medium #847. This Sudoku have 23 given numbers (clues)..
Structure: 4 (1 pcs.), 6 (2 pcs.), 2 (2 pcs.), 9 (2 pcs.), 8 (3 pcs.), 7 (3 pcs.), 1 (3 pcs.), 3 (3 pcs.), 5 (4 pcs.), ∑23.


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