Sudoku #x864

Sudoku game, level: Expert #864. This Sudoku have 27 given numbers (clues)..
Structure: 1 (1 pcs.), 8 (1 pcs.), 2 (2 pcs.), 5 (2 pcs.), 7 (3 pcs.), 3 (4 pcs.), 4 (4 pcs.), 6 (5 pcs.), 9 (5 pcs.), ∑27.


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