Partner opens 2NT (20-22) and I have five hearts and 11 HCP. If I bid 2♦ and partner responds 2H, my 4NT is a quantitative slam try,so how do I cater for the possibility that partner might be minimum, so 6NT is not on, but if partner has four hearts a 6H slam might well be on. If I bid 3H or 4H partner might pass. with 6 hearts I could bid 5C (super Gerber) to ask for aces, but is there any reasonably straightforward way of finding out if an 8 card heart fit exists AND then, depending on the answer, explore either the NO Trump or heart slam.