Flannery

This is an opening bid of 2D to show five hearts and four spades in a hand of about 11-15 high-card points. Responder may then sign off in two of a major, jump to three of a major to invite game, or bid 2NT as a forcing enquiry. Over 2NT, opener rebids:

3C or 3D shows three cards in that suit
3H shows a minimum hand with 2-2 in the minors
3S shows a maximum hand with 2-2 in the minors
3NT shows a maximum hand with 2-2 in the minors and an honor in each minor
4C or 4D shows four cards in that suit