Sudoku #h14

Sudoku game, level: Hard #14. This Sudoku have 25 given numbers (clues)..
Structure: 1 (1 pcs.), 5 (1 pcs.), 2 (3 pcs.), 4 (3 pcs.), 6 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), 3 (4 pcs.), 7 (4 pcs.), ∑25.


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