~2/1: What Does 1D-2D Mean?

1. An “Inverted Minors” denying a 4-card major, showing 10+ HCP, and initiating a try for game in 3NT or a slam in diamonds.

2. A part score in NT or diamonds is the “fall back” contract if a better contract appears unfeasible.

3. Opener is expected to bid major suit stoppers up-the-line. To bypass a major suit denies a stopper in that suit.

4. If opener denies a stopper in either major, responder shows a club stopper and a half-stopper in the bypassed major by bidding 3C.

5. With stoppers in both majors, opener is expected to bid 3NT with 14+ HCP.