SudokuHard

Hard Sudoku — Puzzle 265

8247
378
5264
916
731
3651
13
587

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.

738194652
915826473
426537189
153268794
289471536
647359218
362785941
874912365
591643827