SudokuHard

Hard Sudoku — Puzzle 55

34
453
52968
4652
597
3
1694
69
85

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.

289356471
167849253
354172968
436785129
528961347
971423685
815694732
692537814
743218596