From the above Call graph we can see that time increased significantly for a harder Sudoku puzzle and , the time increased significantly. Moreover, it can also be seen that almost 50% of the time is consumed by the checkRow function, 18.8% by checkColumn and finally 12% by the checkSquare function. Thousands Thousand of call calls were made for to these 3 functions and , if we parallelize them parallelizing these functions then the efficiency of the program will increase can be increased significantly. Therefore this is an ideal project for parallelizing.