SudokuHard

Hard Sudoku — Puzzle 276

648
839
713
21
65349
4358
96
6523

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.

395624871
817359642
426781935
782195364
653478129
941263587
234916758
579832416
168547293