SudokuHard

Hard Sudoku — Puzzle 219

7318
175
6489
41
927
562
9
7435
26

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.

579431286
281796543
364825179
638254791
942173658
715968324
456387912
197642835
823519467