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・ Grand Slam (golf)
・ Grand Slam (horse)
・ Grand Slam (NASCAR)
・ Grand Slam (PBA)
・ Grand Slam (real tennis)
・ Grand Slam (rugby union)
・ Grand Slam (shinty)
・ Grand Slam (Spiderbait album)
・ Grand Slam (tennis)
・ Grand Slam (The Isley Brothers album)
・ Grand Slam (TV series)
・ Grand Slam (U.S. game show)
・ Grand Slam Championship
・ Grand Slam Chess Association
・ Grand Slam Cup
Grand slam force
・ Grand Slam of Curling
・ Grand Slam of Darts
・ Grand Slam of Eventing
・ Grand Slam of Golf
・ Grand Slam of Grass
・ Grand Slam of Show Jumping
・ Grand Slam of Ultrarunning
・ Grand Slam Opera
・ Grand Slam Paris
・ Grand Slam Prize in harness racing
・ Grand Slam Single
・ Grand Slam Tennis
・ Grand Slam Tennis 2
・ Grand Slam Tokyo


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Grand slam force : ウィキペディア英語版
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 (notrump), 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 his or her partner bids 5NT, it is implied that hearts are the desired trump suit. The original bidder will sign off in 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.
==See also==

* Blackwood convention
* Norman four notrump
* Quantitative notrump bids
* Slam-seeking conventions
* Cue bid

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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