SudokuHard

Hard Sudoku — Puzzle 104

3487
523
7568
3728
2
48
539
17
361

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.

364189275
981572463
752463981
693724518
278315694
145896327
527631849
419258736
836947152