Description

The aim of the puzzle is to enter a digit from 1 to 9 in each cell of a 9×9 grid made up of 3×3 sub grids, starting with various digits given in some cells. Each row, column, and subgrid must contain only one instance of each digit.

Instructions

1.Fill in the grid so that every row, every column, and every 3×3 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).