"Razor's Edge", a 3v3 medium sized map with a more-or-less central choke point. I really enjoyed that match because of the choke point (forced my AI buddies not to go run off and get themselves blown up!) and the battles it lead to over the central planets.
So my question is; Is there any similar map out there?
You prolly hit upon the best chokehold map, altho "Razor's Edge" is very small (only 3 planets per player).
"Fulcrum" is also a 3v3 with two central choke points. A bit bigger. But can also sneak thru the pirate base.
"Entanglement" is a fun unique map (of 'rings') with lots of potential choke points.
"Backstab" & "Foreign Invasion" are also 3v3s with some good chokes.
"Grindstone" is a tight 4v4 with a couple potential chokes.
"Gateway" in unique with a single choke (gateway) to another large empty system.
A couple of the new maps in Diplomacy are linear and have great chokes.
To get a quick preview of a map, just start the game/map, and hit surrrender, then keep playing and you can instantly see the entire layout.