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| Bridge Terms |
 Convention Card
A bridge convention is a system of calls made during the auction phase of a contract bridge game which conveys a coded meaning about the players' card holdings. The calls may be "natural" (that is, show a feature of the named denomination,[1] such as the length of a suit) or "artificial" (show a feature unrelated to the named denomination).
Conventions to be played must be agreed by partners before play begins and must be disclosed to their opponents, either in advance by the use of convention cards or by alerts, announcements, and answers to questions about one's partner's bids once bidding has begun. Generally, this disclosure also must include negative implications of choosing the bid over another alternative. Failure to reveal fully the existence and meaning of a convention generally constitutes an illegal communication of information between partners.
Psyche
Psychic bid (also psyche, pronounced to rhyme with like) is a bid in contract bridge, grossly misstating the power and/or suit lengths of one's hand, used deliberately to confuse the opponents. Normally, the psychic bid is done with a weak hand overstating the overall strength, length and strength in a particular suit, or both.
Per rules of the game, a psychic bid should mislead not only the opponents, but also the partner. So, a partnership utilising occasional psychic bids has to be cautious in ensuring full disclosure—not only of their formally agreed bidding system—but also of their habits. If within a certain partnership and under certain circumstances a misleading bid has been made more often, it is no longer considered a true psychic bid, but rather a partnership's habit. The partnership needs to disclose this information to the opponents.
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