[ghostbrainalpha]

There is also a Ruby Warrior project if someone want to do this in Ruby.

https://github.com/ryanb/ruby-warrior

[aeorgnoieang]

At the bottom of the project's README:

> This project was born as a port of ruby-warrior. Credits for the original idea go to Ryan Bates.

I was sure of it based on how (almost exactly) similar this was.

[guessmyname]

Indeed! This is how I learned Ruby several years ago, fun project.