“Extended” Passes are simply passes that have evolved/branched out from the original concepts of Coach Mouse Davis. A couple of them, such as 14/15 (Hank) and Georgia are under Base Passes simply because they have become just that. There are quite a few but none of them are more important that learning the core foundation Mouse designed. When you study closely, you can begin to see how some of these concepts branched off and/or how similar they begin to look and feel to other concepts.
Extended Pass Plays: