Sudoku #h791

Sudoku game, level: Hard #791. This Sudoku have 27 given numbers (clues)..
Structure: 2 (2 pcs.), 3 (2 pcs.), 5 (2 pcs.), 6 (2 pcs.), 9 (2 pcs.), 4 (3 pcs.), 8 (4 pcs.), 1 (5 pcs.), 7 (5 pcs.), ∑27.


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