In this play, we didn't get far enough to find out if the German player had any tunnels. When you lose the OBA, almost every move is a down 2 shot and my opponent's avg. DR was a 6.65. It was deadlyRO 6 really depends a lot on the OBA.
Did the Germans use tunnels craftily?
Why would you forfeit a fortified building location in order to obtain a tunnel? 3 locations (L38 cellar, L38 G floor, & Q39) automatically scream for a fortified location in order to stop any sewer movement infiltration. The others I suspect would be optimally placed to stop a direct assault on S38 (along with the wire). You can't go around the buildings to come in from behind if your opponent placed a MG on his flanks as again you are running through -2 shots. It's a tough nut to crack.