A double by advancer, after overcall has bid, and after responder has raised opener's suit, is responsive, and shows the unbid suits. It is used ONLY after opponents have found a suit fit. Otherwise, the second double is for penalty.
S: KQJx H: AJTx D: x C: K9xx S: Axxx H: Qxxx D: xx C: JTx W N E S 1C X 2C X 3C 4H P/O
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.
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Bridge Conventions (List)
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