Partner opens an unfavourable weak two in ♥, RHO passes and you pick up:
Scoring: MP
4♥ may be best for 620, or 3NT going with overtricks, but that may fail on ♠ leads. If partner has the ♥A (not too unlikely) slam has a chance and this of course outscores both 4♥ and 3NT if it makes.
To leave opponents in the dark you just bid 6♣.
Scoring: MP
LHO leads ♠A and switches to a trump.
If any intermediates want to solve this hand, go ahead. If you are an expert, don't write the solution please.

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