Contract bridge, or simply bridge, is a trick-taking game using a standard 52-card deck. It is played by four players in two competing partnerships, with partners sitting opposite each other around a table. Millions of people play bridge worldwide in clubs, tournaments, online and with friends at home, making it one of the world's most popular card games, particularly among seniors. The World Bridge Federation is the governing body for international competitive bridge.
The game consists of several deals each progressing through four phases: dealing the cards, the auction (also referred to as bidding), playing the hand, and scoring the results. Dealing the cards and scoring the results are procedural activities while the auction and playing the hand are the two actively competitive phases of the game.