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  2. 2/1 game forcing - Wikipedia

    en.wikipedia.org/wiki/2/1_game_forcing

    1 ♠ – 22 ♠ – 2NT. Forcing to game, with balanced hand and a good club suit. 1 ♠ – 22 ♦ – 3 ♣ Forcing, unless the partnership has agreed that this is an exception to the "2/1 rule." 1 ♦ – 2 ♣ Forcing for one round only (as in Standard American), except in the variant of 2/1 where this sequence is game forcing as ...

  3. 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 ...

  4. 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:

  5. Polish Club - Wikipedia

    en.wikipedia.org/wiki/Polish_Club

    Two types of Splinter bids 1 ♥ - 3♠ = any shortage, 9–12 HCP (then 3NT asks shortage) 1♠ - 3NT = any shortage, 9–12 HCP (then 4♣ asks shortage) 1 ♥ - 3NT = spade shortage, 12–16 HCP 1 ♥ /1♠ - 4♣, 4 ♦, 4 ♥ (after 1♠) = bid shortage, 12–16 HCP Drury-fit by a passed hand 2 of the bid major is the weakest rebid. Jump ...

  6. XYZ convention - Wikipedia

    en.wikipedia.org/wiki/XYZ_convention

    For example, on the sequence 1 ♣-1 ♠ (with or without opponent's interfering);1NT-2 ♣;2 ♦,2 ♥ will show an invitational hand with minimum five spades and four hearts, 2 ♠ an invitational hand with minimum five spades (in which case one does not have four hearts) or possibly six spades with or without four hearts. 2NT will show a balanced invitational hand, 3 ♣ typically an ...

  7. Forcing bid - Wikipedia

    en.wikipedia.org/wiki/Forcing_bid

    In the card game contract bridge, a forcing bid is any call that obliges the partner to bid over an intermediate opposing pass. Owing to the partnership's bidding system or a bridge convention, partner must "keep the bidding open", [1] i.e. not pass, thereby preventing his left-hand opponent from ending the auction with a pass and enabling the "forcing bidder" to bid further.

  8. Slam-seeking conventions - Wikipedia

    en.wikipedia.org/wiki/Slam-seeking_conventions

    Slam-seeking conventions are codified artificial bids used in the card game contract bridge. Bidding and making a small slam (12 tricks) or grand slam (13 tricks) yields high bonuses ranging from 500 to 1500 points. However, the risk is also high as failure to fulfill the slam contract also means failure to score the bonus points for a game ...

  9. Strong club system - Wikipedia

    en.wikipedia.org/wiki/Strong_club_system

    The Strong Club System is a set of bidding conventions and agreements used in the game of contract bridge and is based upon an opening bid of 1 ♣ as being an artificial forcing bid promising a strong hand. [1] The strong 1 ♣ opening is assigned a minimum strength promising 16 or more high card points. All other bids would therefore be ...