Sudoku #x315

Sudoku game, level: Expert #315. This Sudoku have 27 given numbers (clues)..
Structure: 2 (2 pcs.), 6 (2 pcs.), 9 (2 pcs.), 1 (3 pcs.), 4 (3 pcs.), 5 (3 pcs.), 3 (4 pcs.), 7 (4 pcs.), 8 (4 pcs.), ∑27.


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