Sudoku #x844

Sudoku game, level: Expert #844. This Sudoku have 28 given numbers (clues)..
Structure: 4 (0 pcs.), 2 (1 pcs.), 6 (1 pcs.), 7 (3 pcs.), 3 (4 pcs.), 9 (4 pcs.), 1 (5 pcs.), 5 (5 pcs.), 8 (5 pcs.), ∑28.


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