Sudoku #x665

Sudoku game, level: Expert #665. This Sudoku have 28 given numbers (clues)..
Structure: 1 (2 pcs.), 6 (2 pcs.), 7 (2 pcs.), 2 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), 4 (4 pcs.), 5 (4 pcs.), 3 (5 pcs.), ∑28.


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