SudokuHard

Hard Sudoku — Puzzle 298

517
63
925
271
7698
38
9
2946
7312

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.

514396278
678152943
932748615
286473591
157629834
493815726
841267359
329584167
765931482