Sudoku #x727

Sudoku game, level: Expert #727. This Sudoku have 25 given numbers (clues)..
Structure: 3 (2 pcs.), 4 (2 pcs.), 9 (2 pcs.), 2 (3 pcs.), 5 (3 pcs.), 6 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 1 (4 pcs.), ∑25.


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