This is popular in some circles , but whenever 2NT is bid without a jump there is no general agreement this should show a fit. In the old days experts observed we have not enough ways of raising partner. Nowadays some partnerships have no way of bidding a suit but too many ways of showing a fit. For me cue-bidding opponent's suit is good enough to show a limit raise or better, when 2NT is not available as a jump bid. One idea I first learned in Poland is to use 2NT and higher bids as transfers in these scenarios where RHO has overcalled at the two level. If opener accepts the transfer it is not forcing. A sort of generalized Rubensohl. The scenario is slightly different when there was a jump overcall and when (like here) the overcall was in a lower ranking suit. This last scenario gives you 2 cuebids to show different other handtypes. You can directly overcall in overcaller's suit and you can now transfer into overcaller suit. For example after 1S-(2H) Double: Negativ (could be a balanced hand interested in notrumps) 2S: normal raise 2NT: club suit 3C: diamond suit 3H: spade invite or better 3D: anything else you like to describe (e.g asking for help in overcaller's suit) Rainer Herrmann *** Dbl: could be converted for penalties, thus promising >= A+K. *** 2NT,3C,3D: could be help suit raise *** 2NT: could be arbitrary strong IFF certain rebids are chosen. Eg. big 1-suiter, 2-suiter, bal w/o stop, big bal w stop Some bid reserved for a big hand, not a raise, to be shown next. I suggest "lowest" transfer may rebid to show very strong/near slammy not fitting.