SudokuHard

Hard Sudoku — Puzzle 28

934
4173
951
56312
47
9
4362
29
81

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.

159863427
684127935
327954681
576398142
931245876
248716359
493672518
765481293
812539764