| The auction
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| | win at least 50% of the available tricks
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| The auction determines the declaring side
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| | in the pack (50% x 13 tricks = 6.5
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| and the final contract, which consists of
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| | tricks) if allowed to play the named
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| the denomination and level (number of
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| | contract.
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| tricks). Only one of partners of the
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| | A player wishing to bid must make a bid
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| declaring side, referred to as declarer,
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| | that is higher than the preceding bid. A
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| will play the hand, while the other will
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| | bid is higher if it specifies any
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| become the dummy (i.e. doing nothing). In
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| | denomination on a higher level, or a
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| addition, if the final contract is
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| | higher-ranked denomination on the same
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| doubled (by the opponents) or redoubled
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| | level. The denominations are ranked, from
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| (by the contracting partnership) the
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| | lowest to highest, as clubs , diamonds ,
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| scoring of the hand is increased, whether
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| | hearts , spades , and no trump (NT).
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| the contract is made or defeated.
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| | Thus, after a bid of 3, bids of 2 or 3
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| During the auction, each player makes a
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| | are not allowable, but 3or 4 are. Thus, 1
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| call at his turn, which must be one of
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| | is the lowest possible bid, followed by 1
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| the following:
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| | etc, while 7NT is the highest possible
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| Bid (stating a level and a denomination)
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| | bid. It should be noted that the primary
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| Double (when the last call other than
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| | purpose of the early bids is to
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| pass was a bid by an opponent)
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| | communicate between partners rather than
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| Redouble (when the last call other than
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| | to determine the final contract.
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| pass was a double by an opponent)
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| | A double can be made only after the
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| Pass (when unwilling to make one of the
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| | opponents have made a bid. At its
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| three preceding calls, i.e. "abstain")
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| | simplest, this states that the player is
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| (Note: although technically incorrect,
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| | so confident that the opponents cannot
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| the word "bid" is also often used
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| | make their bid during play that the
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| informally in place of "call")
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| | player is willing to double their score
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| The auction starts with the dealer and
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| | if they do and the penalty if they do
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| proceeds clockwise with each player,
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| | not. However, in modern bridge, the
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| having first evaluated their hands,
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| | double is often used in conventional
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| making a call in order. The auction ends
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| | sense, to ask partner to bid or to pass
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| when 3 successive passes occur after a
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| | information to partner. A "redouble" is a
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| bid, double or redouble (or if all 4
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| | bid which can be made only following an
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| players pass in the first round).
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| | opponents' "double"; it increases the
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| A bid specifies how many tricks the
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| | points scored yet further. In practice
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| bidder believes that the partnership can
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| | the redouble can also be used
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| take using both their hands, and with
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| | systemically for other purposes. Double
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| which strain as trump. Any bid starts
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| | and redouble are in effect only until the
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| with the assumption that the bidder can
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| | next bid, i.e. any subsequent bid
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| make at least six tricks, called book,
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| | invalidates them.
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| plus the stated number of additional
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| | Once the auction ends, the last bid
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| tricks. So the bid includes a level (from
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| | (together with any double or redouble
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| one to seven, representing how many
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| | that followed it) becomes the contract,
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| tricks beyond six the bidder proposes to
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| | and the level of this bid determines the
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| make) and a denomination (also called
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| | number of tricks required to achieve the
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| strain), which is either a suit or "no
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| | contract and its denomination determines
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| trump". For instance, "3 hearts" asserts
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| | what suit, if any, will be trumps. The
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| that his partnership can take nine tricks
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| | pair that did not win the contract is
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| (book plus three) with hearts as the
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| | called the defense. The pair that made
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| trump suit. There are 35 possible bids,
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| | the last bid is divided further: the
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| which include all combinations of 5
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| | player who first made a bid in the
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| denominations and 7 levels (7-13 tricks).
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| | denomination of the final contract
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| Thus to bid, a player is effectively
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| | becomes the declarer and their partner
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| stating they expect their partnership to
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| | becomes the dummy
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