Sudoku #x499

Sudoku game, level: Expert #499. This Sudoku have 29 given numbers (clues)..
Structure: 4 (2 pcs.), 8 (2 pcs.), 9 (2 pcs.), 6 (2 pcs.), 5 (3 pcs.), 1 (4 pcs.), 7 (4 pcs.), 2 (5 pcs.), 3 (5 pcs.), ∑29.


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