It is a Python program that can recursively solve 9x9 Sudoku problems.
A text file with a 9x9 Sudoku board. Each line of the file is a row of the board, with spaces in between each cell. Empty cells should be denoted with an underscore (_). Example inputs/testcases are given within the repository.
It prints the given text file/puzzle board, and then prints it's solved version directly below. If it cannot solve the given puzzle, it lets the user know.