This week's challenge was to create an engine that solves even the hardest Sudoku puzzle.
####To use: Create a new grid with the 81 numbers as an argument with blank cells as 0.
For example:
grid = Grid.new(015003002000100906270068430490002017501040380003905000900081040860070025037204600)Use .solve to solve the puzzle For example:
grid.solve