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  2. 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 ...

  3. Blue Club - Wikipedia

    en.wikipedia.org/wiki/Blue_club

    Blue Club gave significant advances in finding safe slams, which other systems of that time could miss. Non Blue Club players consider the system to be complicated and artificial but practitioners will point out that it is relatively natural, for instance, other than the artificial one club opening, all one-level opening bids promise at least four cards in the suit, whereas in many other ...

  4. Precision Club - Wikipedia

    en.wikipedia.org/wiki/Precision_Club

    Other popular Precision variations on opening bids are using a strong 1NT (14–16 is most common), using 2 ♣ to show only a 6+ club suit and expanding the possible hand patterns for the 2 ♦ bid to include the usual 4414 and 440–5 as well as 431–5 and 341–5,1 ♦ bid promises at least 2 diamonds.

  5. Fourth suit forcing - Wikipedia

    en.wikipedia.org/wiki/Fourth_suit_forcing

    Fourth suit forcing (also referred to as fourth suit artificial; [1] abbreviated as FSF or 4SF) is a contract bridge convention that allows responder to create, at his second turn to bid, a forcing auction. A bid by responder in the fourth suit, the only remaining unbid suit, is artificial indicating that responder has no appropriate alternate ...

  6. Bidding system - Wikipedia

    en.wikipedia.org/wiki/Bidding_system

    A bid of 1 ♥ or 1 ♠ shows at least 4 or 5 cards in the major suit, and 1 ♣ or 1 ♦ shows at least 3 or 4 cards in the minor suit. The complete hand usually contains about (11)12-20(22) high card points. As between two major suits or between two minor suits, the bidder opens in the longer suit; with equal lengths, the higher ranking suit ...

  7. Law of total tricks - Wikipedia

    en.wikipedia.org/wiki/Law_of_total_tricks

    If the N-S diamonds were divided 4-2 instead of 5-1, with clubs consequently divided 3-3, the available total tricks would be only 8 for N-S + 8 for E-W = 16 If, on the other hand, the E-W spades were divided 3-1 instead of 2-2 (with appropriate minor-suit rearrangement), they could make 2 ♥ , while N-S could still make 4 ♠ , giving 18 ...

  8. Baron convention - Wikipedia

    en.wikipedia.org/wiki/Baron_convention

    Opener responds 2NT with a minimum or at the three-level in his lowest four-card suit with a maximum. Responder may have one of two ranges: 11-12 points (looking for game in notrump) or 17-20 points (looking for slam in notrump or a minor suit). Similarly after a 2NT opening, 3 ♠ asks opener whether he is minimum or maximum, looking for a slam.

  9. Woolsey convention - Wikipedia

    en.wikipedia.org/wiki/Woolsey_convention

    3-1=4-5 distributional hands in the balancing seat regularly double, even with no 4-card major suit. Strong hands, with 19 high card points plus, start with a double and then rebid 2 Notrump (or double) to try to expose a psychic bid. Good 4-4=4-1 distributional hands with a stiff minor suit can start with 2 ♣.