SudokuHard

Hard Sudoku — Puzzle 156

72
5618
49
4517
1423
63
879
3624
6

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.

718539426
592614783
346287591
423851679
179426358
865973214
681745932
937162845
254398167