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Bridge Conventions (List)After opener has bid 1 of a major, responder bids
4C = game-forcing values, 4 card support, and 2 of the 3 top trump honors
4D = game-forcing values, 4 card support support, and fewer than 2 of the top 3 trump honors.
Inverted Trump Swiss Raises
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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