Sudoku - Free Classic Puzzles

If you are the big fan of puzzle games, then you should not miss Sudoku.
Sudoku - Classic Puzzles have four difficulty levels: easy , medium , hard, and expert! Choose any level you like!

FEATRURES：
★Single-Solution
★Minimalist graphics
★Notes and Hints
★Free to play
★No time limited

??Challenge your brain anywhere, anytime!