In my opinion, which I appreciate may not be shared by all, the sweet spot for growth is when playing players about 200 rating points above your own. Still gives you about 25% of points, so it's not a demoralising beating, and also the moves (positional or tactical) are mostly still within your understanding.
My thinking was maybe to organise some sort of Scheveningen: a 5-6 junior vs 5-6 adults over 2 or 3 days. This would allow to get 2100+ adults (maybe 2200+ even) and give the children 5-6 challenging games. A bit like norm Scheveningen, but for a level or two below that.
Also might create some junior team spirit and positive reinforcement loops.
Thing is, how would you go organising such a tournament? As I see it, the issues are:
- not many adults enjoy playing juniors, especially if they can lose rating
- probably means I would need to offer free entry to the adults to entice them to play only juniors over a week-end? Or maybe a prize to the adult team depending on how many points they got?
- balance the books with only 5-12 paying participants.
- how to even advertise for such an event? I think I can reach some of the top juniors or some age groups, and others through the ECF, but how would you find adults willing to play such an event (and ideally pay for it). Also, the pool of 2200 (or even 2000) players playing OtB isn't that big (e.g. only 400 players between 2100 and 2200).
- if Fide rated, adds the complexity of ECF membership needing to be gold or above
Maybe ask an experienced organisers who may have willing players on his distribution list and could organise it for a fee (but how much would it cost?)