Sudoku #x654

Sudoku game, level: Expert #654. This Sudoku have 28 given numbers (clues)..
Structure: 9 (0 pcs.), 7 (1 pcs.), 8 (3 pcs.), 3 (3 pcs.), 6 (3 pcs.), 5 (4 pcs.), 1 (4 pcs.), 2 (5 pcs.), 4 (5 pcs.), ∑28.


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