SudokuHard

Hard Sudoku — Puzzle 281

56174
492
6
7865
83
413
7
695
3421

How to play

Fill every row, every column and every 3 by 3 box with the numbers 1 to 9, using each number once.

This puzzle has 26 given numbers and exactly one solution, so it can always be finished by reasoning alone.

395261784
416798532
728534691
237846159
589172463
641359827
952617348
164983275
873425916