Sudoku #x171

Sudoku game, level: Expert #171. This Sudoku have 25 given numbers (clues)..
Structure: 9 (1 pcs.), 6 (2 pcs.), 4 (2 pcs.), 7 (3 pcs.), 5 (3 pcs.), 2 (3 pcs.), 3 (3 pcs.), 1 (3 pcs.), 8 (5 pcs.), ∑25.


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7
3
9
8
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8
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6
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8
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7
8
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5
7
4
8
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