Here's a relatively simple and even scenario from PQ-17...I'm sort of practicing for when the Norway 1940 expansion comes out. Here we see that Trinidad (T) and Prinz Eugen (E) are both trying to get to where they can get repairs. No convoys are involved. Historically the Germans won and sank HMS Trinidad and got the Prinz Eugen back for repairs. It could have been tricky since the USS Washington was in Iceland and other battleships and carriers were on hand as well. So we will see via the crudest possible solitaire (increased randomness in location and recon) allows for a more dramatic set of events: