Sudoku #x612

Sudoku game, level: Expert #612. This Sudoku have 27 given numbers (clues)..
Structure: 7 (0 pcs.), 1 (1 pcs.), 4 (3 pcs.), 8 (3 pcs.), 2 (3 pcs.), 5 (4 pcs.), 6 (4 pcs.), 3 (4 pcs.), 9 (5 pcs.), ∑27.


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6
3
8
5
1
6
9
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5
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8
4
5
3
9
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9
6
8
9
4
9
3
5
6
3
4
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