Sudoku #m335

Sudoku game, level: Medium #335. This Sudoku have 23 given numbers (clues)..
Structure: 2 (1 pcs.), 1 (2 pcs.), 7 (2 pcs.), 3 (3 pcs.), 4 (3 pcs.), 5 (3 pcs.), 6 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), ∑23.


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7
5
4
7
2
8
9
1
8
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4
6
8
9
5
6
1
3
5
3
9
4
6
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