W-----------N-----------E-----------S
P------------P(1)--------P-----------1♣(2)
p------------1♥(3)------P-----------2N(4)
P------------3♣(5)------P-----------3♦(6)
P------------3N(7)-------P-----------?
(1) You play 10-12 mini-NT open when white
(2) precision 16HCP+(can be less with distribution)
(3) natural positive, 4+ ♥, 8+ HCP
(4) artificial, 4+ ♥ support and unspecified singlton/void.
(5) ask
(6) ♣ short
(7) Serious 3NT, showing further interest.
If with the following additional agreement in the context:
Over 3♦, North may:
1. bid 3♥ showing 5+ hearts
2. bid 3♠ showing A/K in spades
3. bid 4♣ showing all values are outside clubs
What do you bid if you were South?