Description: The aim of the puzzle is to enter a digit from 1 to 9 in each cell of a 9x9 grid made up of 3x3 sub grids, starting with various digits given in some cells. Each row, column, and sub-grid must contain only one instance of each digit.
Instructions: 1.Fill in the grid so that every row, every column, and every 3x3 box contains the digits 1 through 9 without repetition.
2. You will be given a random puzzle and there is one and only one solution.
3. The time you consume in solving puzzle will be your score(lowest is best).
