This is a sudoku solver using the backtracking algorithm. It includes a graphical GUI as well as a text based version.
Install pygame by running 'pip install pygame' in your command line.
Run GUI.py to play sudoku.
Click a box and hit the number on your keybaord to pencil in a number. To confirm that value press the ENTER key on that box. To delete a pencil in you can click DEL. Finally to solve the board press SPACE, sit back and watch the algorithm run.