SudokuHard

Hard Sudoku — Puzzle 207

63
985
81
8179
5498
6
19837
238
71

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.

653971284
941628375
782534196
864312759
375496821
219857643
196285437
527143968
438769512