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
Bidding (cards) deal - listen - announce - reply) or in succession as in Schafkopf. If a player overbids this usually has negative consequences, often involving the loss of the game. However, overbidding in Bridge may be used as a tactical manoeuvre in order to prevent the opponents playing a high value game. Bidding (cards) Bidding is the process in many card games, such as Skat, Pinochle, Binokel, Bridge, Solo Whist, Préférence, L’Hombre, Bauernschnapsen and most types of Tarock, whereby players vie to be able to specify the type of contract, the trump cards and/or to be able to pick up a