Sudoku #x140

Sudoku game, level: Expert #140. This Sudoku have 25 given numbers (clues)..
Structure: 8 (2 pcs.), 3 (2 pcs.), 9 (2 pcs.), 7 (3 pcs.), 5 (3 pcs.), 2 (3 pcs.), 4 (3 pcs.), 1 (3 pcs.), 6 (4 pcs.), ∑25.


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