SudokuHard

Hard Sudoku — Puzzle 56

564371
7265
48
72
865
6
417
93
916

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.

568493721
723816594
149257386
917384652
284675139
635921847
451739268
876542913
392168475