SudokuHard

Hard Sudoku — Puzzle 124

571
36154
9765
89
468
5
21
5472
93

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.

524873169
386159247
197264538
873621495
469735812
215498376
652317984
938546721
741982653