A 'future expert' has asked me about bidding this hand. At the table a confident 4NT (keycard in hearts) was bid and recognised as such, although they had not considered what to do over a one keycard response!
What do you think 4NT should be in this auction?
And if, like many future experts, a jump to 4NT is known to be keycard in the last named suit, what would bid?
Finally, if 4NT is known to be quantitative, what would you bid if the ♣Q was the ♥Q (and you would now like to bid keycard)?
Thanks
Paul

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1♠ 2♦
2♥ 3♣!
3♥ ?