SudokuHard

Hard Sudoku — Puzzle 208

7
1568
12
2697
7326
85
86
97214
39

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.

263198547
149572368
758346129
326915874
971483256
485267931
834759612
597621483
612834795