SudokuHard

Hard Sudoku — Puzzle 57

123
682
243
18
8
61837
79
942
5973

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.

719526834
634798521
825431976
392674158
478152369
561983247
183267495
947315682
256849713