In my search for Jiu-Jitsu knowledge I've come across many different types of Guards, some known and some not so known. So, in an effort to help educate the new white belt or whomever, I'm listing below the names & types of Guards I've come across. Please feel free to look up these Guards to learn more about them, give your 2cents worth, & post any Guard you may know of that I have not listed. Thanks
1. Closed Guard
Basic Closed Guard
High Guard
Leghook Guard
Shawn Williams Guard
Rubber Guard
2. Half Guard
Basic Half Guard
Deep Half Guard
Lockdown Half Guard
Quarter Guard
93 Guard
Z Guard
Half Butterfly Guard
Instep Guard
Sitting Half Guard
3. Open Guard
Basic Open Guard
Turtle Guard
Octopus Guard
X Guard
Butterfly Guard
Spider Guard
Grasshopper Guard
Cross Guard
De La Riva Guard
Reverse De La Riva Guard
50/50 Guard
Tornado Guard
Upside Down Guard
Sitting Open Guard
"Pull Guard": putting your opponent into one of your Guards (Closed, Half, or Open).
"Passing Guard": escaping your opponents Guard (Closed, Half, or Open) to a control position.

1. Closed Guard
Basic Closed Guard
High Guard
Leghook Guard
Shawn Williams Guard
Rubber Guard
2. Half Guard
Basic Half Guard
Deep Half Guard
Lockdown Half Guard
Quarter Guard
93 Guard
Z Guard
Half Butterfly Guard
Instep Guard
Sitting Half Guard
3. Open Guard
Basic Open Guard
Turtle Guard
Octopus Guard
X Guard
Butterfly Guard
Spider Guard
Grasshopper Guard
Cross Guard
De La Riva Guard
Reverse De La Riva Guard
50/50 Guard
Tornado Guard
Upside Down Guard
Sitting Open Guard
"Pull Guard": putting your opponent into one of your Guards (Closed, Half, or Open).
"Passing Guard": escaping your opponents Guard (Closed, Half, or Open) to a control position.