[Sam390250]

Well perhaps the communication thing and the tunnels is refering to alliance robots being on separate sides of the field

Such as Team A & B being an alliance and Team C & D being an aliance

it would be set up where Team A & D can see Team B & C's robots...and Team B & C can see team A & D's....

this would be difficult to set up though, and would need a small barrier or else there would be little room to do anything on the other side...