A bit about lenght of games.
Here are all completed games from years 2018-2021 (start date) divided by days of duration.
The big orange dot represent all the games that ended within 24 hours.
Every other dot is for other integer values (2 days, 3 days and so on…).
As a correspondence player I feel quite diminished. 
There’s one game that lasted 10 … negative days!
Here is the longest game: 2060 days!
I have issues finding the shortest games, since there are plenty of games that lasted… zero seconds!
I’m talking about completed, scored games. I fear there must be some kind of bug somewhere.
Here are few examples: