Alchemist Camp C10: Threatened by rooks, bishops and knights Case insensitive column in Phoenix

Finishing out tic-tac-toe game and giving it a CLI

https://youtu.be/Mrdgd-Hmz-w

We finish our tic-tac-toe game, make a command line user interface for it and debug it.. This entails extensive use of comprehensions, filters and higher-order functions.