Contract bridge

Psychic bid (also psych) is a bid in contract bridge, grossly misstating the power and/or suit lengths of one's hand, used deliberately to confuse the opponents.

Caddy

A non-playing person designated to move boards between tables during a tournament.

Call

Any bid, pass, double, or redouble in the bidding stage.

Chicago

A form of bridge in which a rubber is completed every four deals, and the vulnerability is different in each of those deals. The scoring and sequence of dealer and vulnerability used in duplicate bridge are derived from those used in Chicago bridge. Chicago is said to have been devised by commuters who played bridge on daily train journeys, where the time available for play was limited by the length of the trip.

CHO

Centre Hand Opponent; a slang term for the partner.

The Law of Total Tricks pertains to the card game of contract bridge, and is used to help determine how high to bid in a competitive auction. It is not really a law (because counterexamples are easy to find) but it describes a relationship that seems to exist somewhat regularly. Written by Jean-René Vernes for french players in the fifties as a rule of thumb, it was first described in English in a 1969 magazine article.

In contract bridge, coup is a generic name for various techniques in play, denoting a specific pattern in the lie and the play of cards.

There are various types of coup which can be effected.

Pure Coups

There are many coups where the opponents can do little about:

Bath coup

2/1 game forcing (Two-over-one game forcing) is a bidding system in modern contract bridge, where a non-jump two-level response to a one-level opening bid commits a partnership to at least the game level. It is based on Standard American bidding and has largely superseded it; the principal difference is that a full opening bid is required for a response at the two level to an opening bid of one of a major. Thus, the response of 1NT to 1♥ or 1♠ opening is forcing or semi-forcing.

Squeeze play (or simply squeeze) is a play in contract bridge that often occurs late in the game and involves the play of a card (often, but not necessarily, a winner) which forces an opponent to discard a vital card from his hand, thus giving up a trick (or two in some cases). The discarded card can be either a winner or any card that solidifies defender's defensive position.

Although the squeeze was already discovered and described in whist, its use was best described and perfected in contract bridge.

The squeeze operates on the principle that, in a n-card ending with n-1 combined winners, the two hands can have one potential trick (threat card) each, but there's no room in single defender's hand to cover both of those. In order for a squeeze to work, the victim might not hold any "idle" cards, but all his cards must be "busy", covering some sort of menace.