This opening indicates one of four hands: With game invitational values or better, responder reacts to such a rebid with a 2 ♣ checkback convention to ask opener to further describe his hand. Higher-level responses indicate control count.Ī consequence of the use of the dynamic notrump is that the 1NT rebid by opener becomes wide-range (typically 12-16 hcp). The most common responses to the dynamic one notrump opening are: an unbalanced hand just short of a 2 ♣ opening.a balanced or unbalanced hands in the range of 19-21 high card points (HCP) and six controls, or.The dynamic one notrump opening indicates either: Key features of Romex are the multiple meanings attributed to certain bids, such as the dynamic one notrump and the Mexican two diamonds. The Romex system is a contract bridge bidding system designed by Mexican bridge expert George Rosenkranz.
