We're still tweaking game mechanics, but the general way it works right now is like this:

- If you checkin and your borough already owns that neighborhood your checkin adds a defender to the neighborhood.

- If you checkin and your borough doesn't own that neighborhood, your checkin counts as an attack.

-For an attack we do a dice roll, and based on that dice roll you take out X number of defenders. If your checkin takes out all the defense then your borough now owns that neighborhood and you become a defender.

As the user base increases we'll definitely be tweaking things, but the element of chance is huge to us. It's what keeps things interesting.