Flannery
An opening of 2D to show 5 hearts, 4 spades and 11-15 hcp.
Responses are:
2H/2S to play
2NT asks for a description of the minor suits -
After 2 NT to describe minors:
3 of the minor (some people have the bid show a singleton)
3H 2-2 with 11-13 hcp
3S 2-2 with 14-15 hcp
3NT 2-2 with an honor in each minor
4min 4 of the minor (some would have this show a void)
3 of the minor asks partner to bid 3NT with a "fit" (Ax or Kx or Qxx) otherwise partner bids:
3H with minimum,
3S with maximum
3H/3S inviting game
3NT to play
4C/D transfers back to partner (C - Hearts, D - Spades)
4H/S to play
Some people use 2H instead of 2D as Flannery.
Reverse Flannery shows 5 spades, 4 hearts and 11-15. Responses are similar.