3 NT Opening and its anwers

The auction so far

3 nt	11-17 Solid 4 Major opening	4	Transfer to your suit relay (I have to play it to protect Kings or other vorks)
4	I have but have to protect 2 suits (Kxx and Qx or so)	???

3 nt Printversion

No answers are found / defined. If the basic distribution is known you can ask for exact distribution with Symmetric relay principles. After that the next relay asks for Keycards and the relay after that for the exact controls in specific suit