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
Principle of fast arrival Principle of fast arrival In the game of contract bridge, the principle of fast arrival (also known as the principle of slow arrival) is a bidding treatment widely used in game forcing auctions whereby: Historically, constructive bidding was based on the idea that the stronger a responding hand, the higher a bid, or jump, was made. In modern bidding styles, a slower progression of bids was deemed a more scientific method of investigating for the best contract. The principle of fast arrival was a logical product of this newer style and inverted previous meanings on the premise that since jumps