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2. List of bidding systems - Wikipedia

   en.wikipedia.org/wiki/List_of_bidding_systems

   This is a list of bidding systems used in contract bridge. [1] [2] Systems listed have either had an historical impact on the development of bidding in the game or have been or are currently being used at the national or international levels of competition. Bidding systems are characterized as belonging to one of two broadly defined categories:

3. Wikipedia : WikiProject Contract bridge/Manual of Style ...

   en.wikipedia.org/wiki/Wikipedia:WikiProject...

   Opener: Overcaller: Responder: Response: Meaning and Subsequent Bidding: 1NT: 2 in a suit: 2 in a higher ranking suit: natural and non-forcing: 2NT: a relay bid forcing the opener to bid 3 ♣; after that: – 3 in suit of lower rank than overcalled – natural, to play – 3 in suit of higher rank than overcalled – natural, invitational – 3 in the overcalled suit – a cuebid, artificial ...

4. Bidding system - Wikipedia

   en.wikipedia.org/wiki/Bidding_system

   A bidding system in contract bridge is the set of agreements and understandings assigned to calls and sequences of calls used by a partnership, and includes a full description of the meaning of each treatment and convention. The purpose of bidding is for each partnership to ascertain which contract, whether made or defeated and whether bid by ...

5. Contract bridge probabilities - Wikipedia

   en.wikipedia.org/wiki/Contract_bridge_probabilities

   This table [1] represents the different ways that two to eight particular cards may be distributed, or may lie or split, between two unknown 13-card hands (before the bidding and play, or a priori). The table also shows the number of combinations of particular cards that match any numerical split and the probabilities for each combination.

6. Bidding box - Wikipedia

   en.wikipedia.org/wiki/Bidding_box

   Bidding box for contract bridge. A bidding box is a device used for bidding in bridge, usually in duplicate bridge competitions. Made in various configurations and sizes, it is typically a plastic box with two holding slots, each containing a set of bidding cards: one with 35 cards with symbols of bids, and the other with cards for other calls (pass, double, etc.).

7. Optimum contract and par contract - Wikipedia

   en.wikipedia.org/wiki/Optimum_contract_and_par...

   Where there is competitive bidding (i.e. both sides are bidding) the extra dimension of sacrificial bidding is added, and the theoretical optimum contract can be overtaken by the par contract. The par contract on a deal is that contract that results from optimal bidding by both sides and that neither side could improve by further bidding. It ...