Sudoku #x344

Sudoku game, level: Expert #344. This Sudoku have 28 given numbers (clues)..
Structure: 8 (2 pcs.), 5 (2 pcs.), 2 (3 pcs.), 7 (3 pcs.), 6 (3 pcs.), 4 (3 pcs.), 9 (4 pcs.), 1 (4 pcs.), 3 (4 pcs.), ∑28.


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