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Bridge Conventions (List)
After opponents' open 1NT, overcaller bids as follows:
Dbl = hearts and spades
2C = clubs and spades
2D= diamonds and spades
2H or 2S = shows that suit
2NT = shows both minors
3C = clubs and hearts
3D = diamonds and hearts
Roth-Stone Astro
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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