Responses to 2C opener

Openers responses to 2D

Responders rebids

If responder`s first bid was 2H the only bid he can pass is 2NT. Some play that responder can show a real bust over any suit bid by opener by making the cheapest 3 level bid. Interference If your partner opens 2C and your RHO bids then a pass by you promises a king or an ace and a double denies a king or ace. If your RHO doubles then a redouble by you denies a king or ace and a pass shows a king or an ace.