SudokuHard

Hard Sudoku — Puzzle 195

8637
68
94
139
641
742
3192
53
821

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.

286154379
473269185
951387624
138625497
642971853
597438216
315896742
724513968
869742531