Sudoku #m666

Sudoku game, level: Medium #666. This Sudoku have 24 given numbers (clues)..
Structure: 3 (1 pcs.), 2 (2 pcs.), 5 (2 pcs.), 7 (2 pcs.), 6 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), 1 (4 pcs.), 4 (4 pcs.), ∑24.


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