Negative Slam Doubles

• Bridge Conventions (List)

The double of opponents' slam bid, after doubler's side ahs bid and rasied a suit preemptively, suggests a sacrifice. The double shows zero defensive tricks.
Partner MUST sacrifice UNLESS able to defeat the contract.

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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