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In contract bridge, the Rule of 11 is applied when the opening lead is the fourth best from the defender's suit. [1] By subtracting the rank of the card led from 11, the partner of the opening leader can determine how many cards higher than the card led are held by declarer, dummy and himself; by deduction of those in dummy and in his own hand, he can determine the number in declarer's hand.
Duplicate bridge is a variation of contract bridge where the same set of bridge deals (i.e., the distribution of the 52 cards among the four hands) are played by different competitors, and scoring is based on relative performance. In this way, every hand, whether strong or weak, is played in competition with others playing identical cards, and ...
The first Laws of Duplicate Contract Bridge were published in 1928. [1] They were revised in 1933, 1935, 1943, 1949, 1963, 1975, 1987, 1997, 2007 and 2017. [2] The Laws are effective worldwide for all duplicate bridge tournaments sponsored by WBF, zonal, national and subordinate organizations (which includes most bridge clubs).
In contract bridge, various bidding systems have been devised to enable partners to describe their hands so that they may reach the optimum contract.Key to this process is that players evaluate and re-evaluate the trick-taking potential of their hands as the auction proceeds and additional information about partner's hand and the opponent's hands becomes available.
A hand pattern denotes the distribution of the thirteen cards in a hand over the four suits. In total 39 hand patterns are possible, but only 13 of them have an a priori probability exceeding 1%. The most likely pattern is the 4-4-3-2 pattern consisting of two four-card suits, a three-card suit and a doubleton. Note that the hand pattern leaves ...
long suit (four cards or more) leads: from a sequence of honours lead the highest, thus from KQJx lead the K; from a suit containing an internal sequence lead the top of that sequence, thus from KJ109 lead the J; from a suit headed by an honour, defender generally leads the fourth best card, allowing partner to employ the Rule of 11
In rubber bridge only, a bonus is awarded for any one hand holding four or five of the honors, i.e. an ace, king, queen, jack or ten. 100 points are awarded for any one hand holding any four of the five trump suit honors, and; 150 points are awarded for any one hand holding all five trump suit honors, or all four aces in a notrump contract.
Length in each unbid suit - preferably four cards, at minimum three Some partnerships play that the double of a major promises four or more cards in the other major; High card point (HCP) strength of at least a minimal opening bid - 11 or more HCP More high-card strength is required when opponents have bid on higher levels (e.g. preempted).