Hello is a bridge convention used for intervention over an opponent's 1NT opening. It allows for all one- and two-suited hands to be shown, and - for one suited hands - retains the ability to transfer.
The name of the convention is derived from the names two of its inventors, Jerry Helms and Bill Lohmann. Jerry Helms had previously co-developed "Helms", similar to the Cappelletti convention and saw this as an improvement to that convention. [1] Helms considered that using 2♣ to show a major used up no bidding space and therefore lost the preemptive value typically attached to bidding major suits. [2]
It features the following calls:
By design, in many cases, the advancer will become declarer, thus placing the strong 1NT hand on opening lead.