How do tournaments originate?

The list is added to on a regular basis but by whom?

I would like to start a tournament for the Döry Defence. A banded tournament ...

Russ starts the RHP tournaments. Though I think you are more likely to get a specific thematic tournament via the clubs e.g. MUTI, tournaments on demand or start one yourself. If you want a gambit then Gambit Fantasy - I am happy to receive requests.

If you are just keen to play, then you can set up an open invite using the 'play with opening'.