Sudoku #x340

Sudoku game, level: Expert #340. This Sudoku have 28 given numbers (clues)..
Structure: 4 (1 pcs.), 1 (2 pcs.), 6 (2 pcs.), 7 (2 pcs.), 9 (2 pcs.), 2 (4 pcs.), 3 (5 pcs.), 5 (5 pcs.), 8 (5 pcs.), ∑28.


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