SudokuHard

Hard Sudoku — Puzzle 145

6349
97
726
34
1587
81
318
927
817

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.

263145879
518697243
974328165
687513924
145269387
329874516
732451698
456982731
891736452