SudokuHard

Hard Sudoku — Puzzle 190

1342
39
473
24
73
6475
518
471
175

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.

715683492
832459761
469271538
971365284
254897613
386124975
523916847
647538129
198742356