An opening shows
(a) 5-9 HCP
(b) 5/5 in a major and a minor
Response
Suit=pass with a fit or
bid cheapest suit.
2NT=relay ..
Opener's rebids
3C=clubs/hearts
3D=diamonds/spades
3H=hearts/diamonds
3S=spades/clubs
A bidding convention is an agreement between two players on a different meaning of a bid in the card game bridge. These agreements are made so that partners can more quickly determine which contract, with both their cards, they can win together. Often, conventions are forged together into one, which is then called a bidding system.