Sudoku #x688

Sudoku game, level: Expert #688. This Sudoku have 25 given numbers (clues)..
Structure: 1 (0 pcs.), 8 (1 pcs.), 4 (2 pcs.), 6 (2 pcs.), 2 (3 pcs.), 5 (4 pcs.), 7 (4 pcs.), 9 (4 pcs.), 3 (5 pcs.), ∑25.


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