Sudoku #h707

Sudoku game, level: Hard #707. This Sudoku have 26 given numbers (clues)..
Structure: 3 (1 pcs.), 4 (2 pcs.), 5 (3 pcs.), 6 (3 pcs.), 7 (3 pcs.), 8 (3 pcs.), 9 (3 pcs.), 1 (4 pcs.), 2 (4 pcs.), ∑26.


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