Possibility to lock number
Sudoku is a logic game. The object is to fill a 9x9 grid with digits so that each column, row, and 3×3 sub-grid that compose the grid contains all of the digits from 1 to 9.
- game generates "unlimited" amouth of grids
- select one of 4 difficulties (Very easy, Easy, Advanced, Extreme)
- select one of 8 levels of help (from "Without help" through "Automatically generate possible numbers" to "Automatically solve easy steps"
