Sudoku hard online
Looking to play hard sudoku free, so here it is!
You can play online sudoku hard, save your game in progress or print the game puzzle.
A lot of options available to you as zoom, automatic backup, undo last move...
A sudoku hard is a puzzle which can be solved with more sophisticated methods.
For more difficult sudoku there are the expert level and evil level!
1sudoku.com - n° 310316 - Hard