I write "generic" Natural language processing for a living.

Also "nintendo" is a particular domain. When you only have a "language" of 8 directions, A, and B, and only time to deal with in response to a screen that side scrolls in only one direction the programming is easy.

A chess engine has more potential decisions for a bishop than this has for a given move. And unlike the the NES, the chess engine has to adjust for changes in the behavior. Given the same input the NES would make the same choices. You can macro through most the games.