Sudoku #x305

Sudoku game, level: Expert #305. This Sudoku have 26 given numbers (clues)..
Structure: 1 (1 pcs.), 3 (2 pcs.), 4 (2 pcs.), 5 (3 pcs.), 6 (3 pcs.), 7 (3 pcs.), 2 (4 pcs.), 8 (4 pcs.), 9 (4 pcs.), ∑26.


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