This was one of the computer games from 1976 BASIC computer games that some of us worked on ports of for the Coding Horror: Basic Computer Games repo. I recall there were a number of errors in the original and thus a few in the ports, python being one. I ended up writing about the deduction logic for solving mastermind because it seemed non-intuitive.

https://github.com/coding-horror/basic-computer-games/blob/m...