Sudoku

Everybody knows Sudoku, fill the grid and have fun.

Fill every row, column and region with different numbers from 1 to 9 without any conflict.
Too easy for you, make it harder with 5 different difficulty levels.
Each Sudoku is generated so there is no possibility to have two same to solve.

★ All the sudokus are generated -> All Sudokus are different.
★ 5 Different Levels from Super-Easy to Evil
★ Auto highlighted numbers for intelligent hint
★ Use pencil marks
★ Easy to use