After an opponent doubles a 4NT ace enquiry, Redouble shows zero (O) aces, Pass shows one (I) ace and the lowest bid (5♣) shows two aces etc. This method is in popular use in the UK.
BMB turns 6 this June. To celebrate we’re running an anniversary members’ prize draw with a chance to win lots of goodies!
Click here to enter the 6th Anniversary Prize Draw