Sudoku #h122

Sudoku game, level: Hard #122. This Sudoku have 25 given numbers (clues)..
Structure: 4 (1 pcs.), 5 (2 pcs.), 9 (2 pcs.), 1 (3 pcs.), 2 (3 pcs.), 3 (3 pcs.), 6 (3 pcs.), 8 (3 pcs.), 7 (5 pcs.), ∑25.


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