SudokuHard

Hard Sudoku — Puzzle 11

638
47
69
91524
418
479
574
94321

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.

516492738
479853612
832761594
391526487
724189356
685347129
257914863
948635271
163278945