Cyberyeti, on 2018-May-18, 14:21, said:
The concept is from Tim Bourke (and known as a Bourke relay I think), but we home hashed it a bit, I think the original idea was to use the lowest new suit as a relay so 2♠ would be the relay, but we just use the next suit up regardless.
I looked it up and yes, the original idea was to use the cheapest available new suit as relay.
There isn't much agreement about whether the relay should force to game or for one round or to 4m.
What would the various replies (up to and including your 3NT) mean in your version?