SudokuHard

Hard Sudoku — Puzzle 252

873426
1
843
8
734691
15
79
82
173

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.

958734126
347162859
216859743
629581374
573426918
184397562
795248631
832615497
461973285