2 Diamonds Opening and its anwers

The auction so far

2	7-10 6+ card or (non crap preempts)	3	GF singlesuit (bid your suit at 4 lever without fit or cue or 4 without cue)
???

2 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