I use ETM victory method over 1NT, which works wonders on this hand.
The method includes, 2
♦ as a transfer to 2
♥ with three kind of hands:
- Those hands with five hearts like any normal jacoby.
- Any balanced game try with or without four plus hearts (but not four spades)
- A hand with four (or five) hearts and long minor (weak or strong)
So here I would bid 2
♦. Over 2
♦, partner with less than 4
♥ will bid 2
♥. I will then bid 2
♠ which is either a "range check" game try or shows clubs (partner bids 2NT or 3
♣ depending upon his stregth). I will signoff in 3
♣. If partner shows 4+
♥ over 2
♦, we will be in at least 3
♥ and in all likelyhood, 4
♥ if he shows any signs of life (he can show minimum or max with his non-2
♥ rebids).
For more on this method, see....
http://www.bridgematters.com/onent.htm
BTW, I have a full FD file on these methods over 1NT.
You are South and partner opens 1NT (15-17) in 4th position, opposition amazingly silent