Slam-seeking conventions Slam-seeking conventions Slam-seeking conventions are codified artificial bids used in the card game contract bridge. Bidding and making a small slam (12 tricks) or grand slam (13 tricks) yields high bonuses ranging from 500 to 1500 points. However, the risk is also high as failure to fulfill the slam contract also means failure to score the bonus points for a game (300-500). Conventions have been devised to maximise the opportunity for success whilst minimising the risk of failure. Contract bridge bidding systems are mainly "natural" (most bids have an obvious meaning) or "artificial" (many bids have a meaning unrelated to
American Contract Bridge League American Contract Bridge League The American Contract Bridge League (ACBL) is the governing body for contract bridge in the United States, Mexico, Bermuda and Canada and is a member of the World Bridge Federation, the international bridge governing body. It is the largest such organization in North America having the stated mission ""to promote, grow and sustain the game of bridge and serve the bridge-related interests of our Members."" Its major activities are: , it had more than 165,000 members. A not-for-profit organization, the ACBL was founded on December 23, 1937 in New York City and later moved its company