Strong club system

Strong club system

In the game of contract bridge, a strong club system is a set of conventions that uses an opening bid of 1Clubs as an artificial, forcing opening that promises a strong hand. Compare this with Standard American, which uses the opening of 2Clubs for a similar purpose.

Generally, because of the lower level, the strong 1Clubs opening can be assigned a minimum strength much lower than would be advisable for standard 2Clubs opening. Commonly, the strong 1Clubs will promise 16 or more high card points. All other bids would therefore be limited to a maximum of 15 high card points. Different authorities vary on the minimum for a strong 2Clubs opening, but a typical figure is 22 high card points.

There are two generally acknowledged strengths of the strong club systems: (1) accuracy in uncontested slam-strength auctions, because the bidding starts at such a low level when opener has a fairly strong hand. (2) the fact that all other opening bids have their strength capped by the strong club means more accurate judgment and scope for tactical operation both in constructive and competitive bidding. The generally acknowledged weakness of such systems is the fact that the opponents can aggressively overcall the 1Clubs bid to deprive the stronger opponents of their bidding room, and that the loss of the 1Clubs opening bid often causes strain on other opening bids, most often 1Diams and 2Clubs.

The original strong club system was the Vanderbilt Club, invented in the 1920s by Harold Vanderbilt. For many years, the most popular strong club systems were the Schenken Club in the US and the Neapolitan and Blue Team Club systems in Europe. Both are four-card major systems. The former is patterned closely after the standard American bidding of the time and the latter is characterized by canape (bidding the second-longer suit) in many situations.

Precision Club is another example of a strong club system. It uses five-card majors (opening 1Hearts or 1Spades promises five) which makes them very powerful at the cost of opening 40% of hands with 1Diams.

To utilize fully the space vacated by the strong club opening, many strong club systems, such as Moscito, use what is known as relay bidding, where one hand only is described. Many other strong club systems have also been devised.


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