No beautiful appearance, just SUDOKU. Have fun! Use HINT carefully,and finish the game as soon as possible, and take the 1st place of High Score ! How to get a high score? hard>med>easy, shape>character>number,less time>more time.
How to play
Arrow Keys - select tile Left Mouse Key - select tile Number Keys - fill selected tile Del Key - clear selected tile Shift Key - switch Pen and Pencil