SudokuHard

Hard Sudoku — Puzzle 53

89
183
4835
2813
67
68
1649
639
17

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.

365187924
921645837
478923165
254819673
186374592
793562418
812756349
637498251
549231786