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 (No Trump), when it does not conflict with other conventions used by that partnership (e.g., a 5NT Blackwood bid), is forcing to slam in the suit last bid, unless the trump suit has already been agreed on earlier in the auction. The partner of the 5NT bidder bids as follows:
*6 of the agreed trump suit if holding one of the top three trump honors (e.g., the ace)
*7 of the agreed trump suit if holding two of the top three trump honors (e.g., the king and queen)

For example, if a partnership is using the Grand Slam Force and one member bids 1♥ and his or her partner bids 5NT, it is implied that hearts are the desired trump suit. The original bidder will sign off with 6♥ with one of the top three heart honors, and bid 7♥ with two of the top three heart honors.

As with all bidding systems, the Grand Slam Force has its limitations, not the least of which is that the chances of employing it directly over an opening one-bid are extremely rare and 5NT must be understood to be the GSF in other situations. Also, numerous variations on this convention have been developed.


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • Grand Slam bomb — Infobox Weapon name = Grand Slam caption = A Grand Slam bomb being handled origin = United Kingdom type = Conventional (gravity) bomb is ranged = is bladed = is explosive = Yes is artillery = is vehicle = is missile = is UK = Yes service = 1945… …   Wikipedia

  • Grand slam (baseball) — In the sport of baseball, a grand slam (or just slam for short) is a home run hit with all the bases occupied by baserunners, thereby scoring 4 runs the most possible on a single play. According to The Dickson Baseball Dictionary , the term… …   Wikipedia

  • Grand Slam (Bombe) — Die Grand Slam ist mit über zehn Tonnen Gewicht bis heute die schwerste in einem Krieg eingesetzte Fliegerbombe. Die mit konventionellem Sprengstoff befüllte Sprengbombe wurde Ende 1944 entwickelt und im Zweiten Weltkrieg von den britischen… …   Deutsch Wikipedia

  • Chris Evert's Grand Slam history — Main article: Chris Evert Evert won 18 Grand Slam Tournaments in her career. Chris Evert won eighteen grand slam tournaments for her career (two Australian Open s, seven French Open s, three Wimbledon Championships , and six US Opens), and played …   Wikipedia

  • Exercise Grand Slam — Part of Cold War (1947–1953) Mediterranean Sea Type …   Wikipedia

  • Operation Grand Slam — For other uses, see Operation Grand Slam (disambiguation).   Indo Pakistani War of 1965 …   Wikipedia

  • 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… …   Wikipedia

  • slam — slam1 [slam] vt. slammed, slamming [prob. < Scand, as in Norw dial. slamra, slemma] 1. to shut or allow to shut with force and noise [to slam a door] 2. to hit, throw, or put in place or action with force and noise [to slam a baseball over the …   English World dictionary

  • slam — slam1 [ slæm ] verb ** 1. ) transitive to shut a door or lid with great force so that it makes a loud noise, often because you are angry: He ran from the room, slamming the door behind him. slam the door shut: She slammed the door shut in his… …   Usage of the words and phrases in modern English

  • slam — I UK [slæm] / US verb Word forms slam : present tense I/you/we/they slam he/she/it slams present participle slamming past tense slammed past participle slammed ** 1) [transitive] to shut a door or a lid with great force so that it makes a loud… …   English dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”