SudokuHard

Hard Sudoku — Puzzle 50

5247
869
86
453
9364
85
86
74
9162

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.

569243718
348517629
172896345
621458973
857932164
493761852
286375491
734129586
915684237