RKC in , starting in 4

Bidding diagrams
4    Asking for aces, agreeing
 4  1 or 4 aces
 4  0 or 3 aces
 4NT  2 aces, no Q
  5 To play
  5NT Showing all aces and Q
   6Nathing extra
   7To play
  6 To play
 5  2 aces, Q