SudokuHard

Hard Sudoku — Puzzle 293

47
918
29
81
6579
97
7698
16394
21

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.

218394675
794165823
536782914
857249361
341657289
629813547
472536198
163978452
985421736