Sudoku #m163

Sudoku game, level: Medium #163. This Sudoku have 23 given numbers (clues)..
Structure: 2 (0 pcs.), 8 (1 pcs.), 7 (2 pcs.), 6 (2 pcs.), 5 (3 pcs.), 3 (3 pcs.), 4 (3 pcs.), 1 (4 pcs.), 9 (5 pcs.), ∑23.


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