SudokuHard

Hard Sudoku — Puzzle 200

1956
79
28
8529
563
124
78
94
5397

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.

179256348
358794126
264318957
637485219
845129763
912637584
426573891
791862435
583941672