SudokuHard

Hard Sudoku — Puzzle 229

29
564
9735
31
7624
3865
1579
231

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.

763145289
852639741
491872365
529368417
176254938
384791652
947583126
615427893
238916574