Sudoku #m633

Sudoku game, level: Medium #633. This Sudoku have 23 given numbers (clues)..
Structure: 3 (1 pcs.), 7 (2 pcs.), 6 (2 pcs.), 2 (2 pcs.), 9 (3 pcs.), 5 (3 pcs.), 1 (3 pcs.), 4 (3 pcs.), 8 (4 pcs.), ∑23.


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