Sudoku #h844

Sudoku game, level: Hard #844. This Sudoku have 25 given numbers (clues)..
Structure: 1 (1 pcs.), 6 (2 pcs.), 5 (2 pcs.), 8 (3 pcs.), 7 (3 pcs.), 4 (3 pcs.), 3 (3 pcs.), 9 (3 pcs.), 2 (5 pcs.), ∑25.


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