SudokuHard

Hard Sudoku — Puzzle 274

483
274
7965
21
5413
65
18
129
298

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.

649152783
523876941
781943652
432687195
875419236
916235874
397561428
158724369
264398517