SudokuHard

Hard Sudoku — Puzzle 215

2
6351
39
35164
75
2457
873
49
217

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.

178924563
962835471
345176982
893517624
754268319
621349857
486792135
517483296
239651748