Is there an old thread for this already?
There was a moment before the OTL Battle of the Dogger Bank in WWI when the German fleet commander had his ships set up to draw in and then trap the British battlecruiser and fast battleship units. If the Germans had stuck to their plan it would on paper have worked perfectly, sandwiching the fast elements of the British battle fleet between two dozen German battleships.
Let's say the German Admiral doesn't lose his nerve and this fight occurs as he had hoped.
Outnumbered 2:1 and out-armored ship for ship as well, the British squadrons get destroyed.
The Grand Fleet arrives belatedly.
Does an inconclusive Jutland style battle ensue?
Do the Germans retreat as they've taken some losses in the earlier part of the battle and they're now outnumbered?
What happens after the battle?
How does losing most of their fastest big-gun ships effect Britain's ability to contain the High Seas Fleet?
If you're Germany, what do you do next?