SudokuHard

Hard Sudoku — Puzzle 236

91
9185
873
1675
1
2548
2961
59
63

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.

572493168
934168527
186752493
419286375
368517249
257934816
745329681
821675934
693841752