Sudoku #x311

Sudoku game, level: Expert #311. This Sudoku have 26 given numbers (clues)..
Structure: 6 (1 pcs.), 3 (2 pcs.), 9 (2 pcs.), 8 (3 pcs.), 5 (3 pcs.), 2 (3 pcs.), 4 (4 pcs.), 7 (4 pcs.), 1 (4 pcs.), ∑26.


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5
2
7
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9
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8
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7
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