Place the difficulty to choose the issue number three.
The difficulty is "easy", "normal", "hard" can choose from three,
From beginner to advanced can enjoy.
Each difficulty level, and offers 30 questions.
- Number Place -
number place and Sudoku, also known as
Vertically, horizontally, the game is to fill up to avoid duplicate numbers 1-9 on the mass of 3 × 3.
The rules are simple, profound puzzle game.