Sudoku #m634

Sudoku game, level: Medium #634. This Sudoku have 23 given numbers (clues)..
Structure: 1 (2 pcs.), 2 (2 pcs.), 4 (2 pcs.), 5 (2 pcs.), 3 (3 pcs.), 6 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), ∑23.


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