SudokuHard

Hard Sudoku — Puzzle 206

2
71
9214
5287
437
93
7514
1649
78

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.

175249836
438671259
962853174
651924387
243187965
789365421
897512643
516438792
324796518