2NT = game force 15-19
3♣ = slam interest 6+ suit
3♦,3♥, 3♠, 4♦, 4♠= Ist or 2nd round control
4NT = key card
5♦= 1
so counting 12 tricks
btw you would only initiate cue bidding with at least ♣Kx
Playing 15-17 no trump, how would you bid this?
Would you resort to the "derided in some quarters" Minorwood?
Thats how I think the bidding should have gone in Acol. Alas, after partner's 3♣bid, I woodenly bid 3NT which partner passed.