SudokuHard

Hard Sudoku — Puzzle 194

4251
74
695
57
145
3792
923
41
843

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.

938425167
257168493
146937852
589712634
612384579
374596218
495271386
823659741
761843925