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The Strong Club System is a set of bidding conventions and agreements used in the game of contract bridge and is based upon an opening bid of 1 ♣ as being an artificial forcing bid promising a strong hand. [1] The strong 1 ♣ opening is assigned a minimum strength promising 16 or more high card points. All other bids would therefore be ...
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.
The more modern trend is to lower the threshold of ten cards to nine cards and consider 5-4 distributions also two suiters. The six possible combinations are given the names " major suits " (spades and hearts), " minor suits " (diamonds and clubs), " black suits " (spades and clubs), " red suits " (hearts and diamonds), " pointed suits ...
The Baron Three Clubs is an alternative to the responder using Stayman over a 2NT opening bid. The responder will have five points or more and an unbalanced hand. The responder bids 3 ♣, which asks opener to bid his four-card suits in ascending order. If clubs are the only four-card suit, the opener bids 3NT.
In the sequence 1 ♥ – (1 ♠) – 2 ♠, the cue bid of 2 ♠ denotes a 5-4-4-0 or 4-4-4-1 hand with a singleton or void in spades, as well as 8+ high card points.. At higher level auctions, such as 1 ♠ – (2 ♥) – 3 ♥, partnerships may by agreement allow slightly off-shape hands, including 5-4-3-1 shapes with only 3 card support for opener's suit.
In the 5-3 case, the two remaining established cards (assuming the opponents cards are 3-2 or 2-3) can also bring tricks in no trumps, if there is an entry to the hand which owns these cards. Immediate discovering of 5-4 fits is possible on one way with five-card majors, and on two ways with four-card majors.
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Suppose East is known to have 7 spades from the bidding and after seeing dummy you deduce West to hold 2 spades; then if your two lines of play are to hope either for diamonds 5-3 or clubs 4-2, the a priori probabilities are 47% and 48% respectively but (,,,) % and (,,,) % so now the club line is significantly better than the diamond line.
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