The Romex system is a
contract bridge
Contract bridge, or simply bridge, is a trick-taking card game using a standard 52-card deck. In its basic format, it is played by four players in two competing partnerships, with partners sitting opposite each other around a table. Millions ...
bidding system designed by the Mexican bridge expert
George Rosenkranz
George Rosenkranz (born György Rosenkranz; 20 August 1916 – 23 June 2019) was a pioneering Mexican scientist in the field of steroid chemistry, who used native Mexican plant sources as raw materials. He was born in Hungary, studied in Switzerl ...
.
Key features of Romex are the multiple meanings attributed to certain bids, namely the dynamic one notrump and the Mexican two diamonds.
Dynamic one notrump
The dynamic one notrump opening indicates either:
*a balanced or unbalanced hands in the range of 19-21
high card points (HCP) and six controls, or
*an unbalanced hand just short of a 2 opening.
The most common responses to the dynamic one notrump opening are:
*2 – negative (0-5 HCP)
*2 – 6+ HCP,
game force.
Higher-level responses indicate
control count.
A consequence of the use of the dynamic notrump is that the 1NT rebid by opener becomes wide-range (typically 12-16 hcp). With game invitational values or better, responder reacts to such a rebid with a 2 convention to ask opener to further describe his hand.
Mexican two diamonds
This opening indicates one of four hands:
*a balanced hand with 21-22 points and seven controls
*a balanced hand with 27-28 points and 10 controls
*an unbalanced game-forcing hand with diamonds as the longest suit or
*a three-suited game-force hand.
Other calls
One-level and 2 openings are as per
Standard American
Standard American is a bidding system for the game of bridge widely used in North America and elsewhere. Owing to the popularization of the game by Charles Goren in the 1940s and 1950s, its early versions were sometimes referred to simply as 'G ...
with 3+ minors and 5+ majors and limited by the failure to open one notrump.
Romex employs special asking bids in lieu of cuebidding, and for slam investigation.
References
{{DEFAULTSORT:Romex System
Bridge systems