Sudoku #h143

Sudoku game, level: Hard #143. This Sudoku have 25 given numbers (clues)..
Structure: 5 (0 pcs.), 6 (2 pcs.), 7 (3 pcs.), 9 (3 pcs.), 8 (3 pcs.), 1 (3 pcs.), 2 (3 pcs.), 3 (4 pcs.), 4 (4 pcs.), ∑25.


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