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The American Contract Bridge League (ACBL) is the largest bridge organization in North America. It...

The American Contract Bridge League (ACBL) is the largest bridge organization in North America. It promotes the game of bridge in the United States, Mexico, Bermuda, and Canada, and is a member of the World Bridge Federation. ACBL games and tournaments use the duplicate bridge method of scoring, where the luck of getting a series of good hands doesn't necessarily mean a better score. The ACBL, a not-for-profit organization, was founded in 1937 in New York and later moved its company headquarters to Greenwich, Conn. ACBL moved from Greenwich, Conn. to Memphis in 1971. It has a full-time staff of 75 employees in the headquarters, plus about 170 tournament directors throughout the country. As of 2009 it had more than 160,000 members. Members receive the Bridge Bulletin magazine, but for many of them, the most significant role of the ACBL is its sanctioning of club games and tournaments to award masterpoints. If an event has the ACBL sanction, then the highest-finishing players are awarded specified numbers of masterpoints, which can be recorded with the ACBL. Most players value the increase in their masterpoint total as a measure of their success at the game. Unlike the Elo rating