SudokuHard

Hard Sudoku — Puzzle 30

8145
1798
56
4792
15
2
9134
38
521

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.

279814563
416357298
583962417
864739125
127645839
935128746
791286354
348591672
652473981