An opening of 2 diamonds shows
(a) 7-9 5/5 with a major (b) 8-10 7-card minor max xx major
Response
2H to play there or spades
3 of a suit game try
2NT enquiry .. 3C/D= nat, 3H/S=5/5+minor ,3NT= H+S
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.