ORIGINAL: Chernobyl
Haha my first thought was how did a dreadnought get past the blockade? I have found some of my opponents set up a gigantic Adriatic blockade immediately and some don't at all. Some even try to push into that sea with their navy for whatever reason.
Had to be opening move with cruise and he tucked it in to a bay on the Greek coast or Taranto Bay. I always put a sub there at the mouth of the Adriatic, even though it's a 5 strength, and try to at least contest the convoy route into Montenegro soon after. The other two subs I try to reinforce at a French Port then send them up into the Adriatic in silent mode to 'check on'
the AH fleet, and keep that surveillance up.
This time I didn't because this opponent made really unorthodox moves like bringing the whole of the IGN out into the Atlantic to do a suicide battle during the first 3 to 4 turns including his subs. As a result, I pulled a bunch of naval assets out of the Med and just left a scratch force to do an overwatch, hoping the Italians would get in the war by April 1915. These suicide attacks were also going on on the land, and the game was over by autumn of 1915 with his defeat.
I was using this ambush of my transport as an example, but that game I didn't particularly enjoy because essentially there was no rhyme or reason to what this opponent did at all.