SudokuHard

Hard Sudoku — Puzzle 284

6
9548
539
91
8132
376
58
69
86714

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.

249786351
371925468
658314729
925867134
486139572
137452986
712548693
564293817
893671245