Grand slam force Grand slam force The Grand Slam Force is a bidding convention in contract bridge that was developed by Ely Culbertson in 1936. It is intended to be used in cases where the combined hands of a partnership are so strong that a slam (winning at least 12 tricks) is a near-certainty and a grand slam (winning all 13 tricks) is a possibility. It allows one partner to gain information on the quality of trumps in the other partner's hand. When this convention is in force, a bid of 5NT (five notrump), when it does not conflict with other conventions used
American Contract Bridge League players review and expand upon their knowledge of the game. The ACBL consists of 25 Districts. Each District elects a District Director (DD) who serves a three-year term on the ACBL Board of Directors. Clicking on the district number brings up the web site for that District. Clicking on the Report brings up the District Director report. 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