sudoku-time killer,brain trainer

+++++Gameplay+++++
This is a game with classic soduku puzzles. The controls and hints are original and greatly improved. Touch a blank cell and fill with a candidate number. Multiple candidates can easily be added to a blank cell. A candidate can be easily removed from a blank cell.

+++++Challenge+++++
There are 4 levels of difficulties, each of which has 1000 puzzles. It takes about half an hour to solve each evil puzzles.

+++++Why you should play this+++++
+ Finely tuned controls
+ No ads
+ No restrictions
+ Small in size
+ You only need this if you are a fan of sudoku puzzles.

Have a nice time!