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In contract bridge, card reading (or counting the hand) is the process of inferring which remaining cards are held by each opponent. The reading is based on information gained in the bidding and the play to previous tricks. [ 1 ]
card reading, also known as counting the hand; dummy reversal; endplay; coups; squeezes; suit combinations play; safety play; applying the principle of restricted choice; applying the theory of vacant places; applying percentages and probabilities
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 ...
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:
An EHAA two-bid shows six to twelve high card points, and a five card or longer suit.There are no restrictions on suit quality (xxxxx and AKQJxxxx both qualify). EHAA bidders use a "get in quick, get out quick" style, which permits interference or an opening bid in nearly every auction, protected by fairly strict requirements on further bids by the partnership.
In a more modern form, known as Roman Key Card Blackwood (RKCB), the 4NT bid asks partner to disclose the number of key cards held where the five key cards are the four aces and the king of trumps. Responses are stepwise: 5 ♣ for 0 or 3 key cards, 5 ♦ for 1 or 4, 5 ♥ for 2 without the trump queen, 5 ♠ for 2 with the trump queen.
The bridge pattern can also be thought of as two layers of abstraction. When there is only one fixed implementation, this pattern is known as the Pimpl idiom in the C++ world. The bridge pattern is often confused with the adapter pattern, and is often implemented using the object adapter pattern; e.g., in the Java code below.
The principle of restricted choice is a guideline used in card games such as contract bridge to intuit hidden information. It may be stated as "The play of a card which may have been selected as a choice of equal plays increases the chance that the player started with a holding in which his choice was restricted."