Sudoku #h339

Sudoku game, level: Hard #339. This Sudoku have 27 given numbers (clues)..
Structure: 1 (2 pcs.), 4 (2 pcs.), 6 (2 pcs.), 2 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 3 (4 pcs.), 5 (4 pcs.), 9 (4 pcs.), ∑27.


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