Sudoku #x276

Sudoku game, level: Expert #276. This Sudoku have 22 given numbers (clues)..
Structure: 1 (1 pcs.), 6 (1 pcs.), 8 (2 pcs.), 9 (3 pcs.), 7 (3 pcs.), 5 (3 pcs.), 2 (3 pcs.), 3 (3 pcs.), 4 (3 pcs.), ∑22.


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