Lesson 7 of 14
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507 – Quantitative 4NT for Bidding Slam

507

Slam Using Quantitative Bids

In bridge there are two types of slams – small and grand. A small slam is bidding for 12 tricks whereas with a grand slam you contract to win all 13 tricks. Slam bidding falls into two groups: notrump slams and trump (or suit) slams.

Requirements for Notrump Small Slams

Typically, the two main ingredients to bid all the way up to 6NT are
  • A balanced hand facing a balanced hand
  • 33 high card points (HCP) between the two hands

Bidding Notrump Grand Slams

These are also true for grand slam except, you need 37+ points for grand slam. and if you have..
  • A balanced hand facing partners balanced hand
  • 37+ high card points (HCP) between the two hands
  • Controls in every suit

Wouldn’t you like to see a hand in which you have the power to make a small slam in Notrumps? 


North

West

East

South

In NoTrumps a control or stopper is:

An honor card/s in a suit (usually the Ace or King & Queen) which is certain to prevent the opponents from running a suit in a notrump contract.

NoTrump Slam Bidding

When your partner has bid NoTrump you can signal to your partner 5 different options. Do you want to invite to them to bid game, sign off yourself in game, invite partner to bid slam, force partner to bid slam or sign off yourself in slam. See table below.


Table of Quantitative No-Trump Bids and their meaning

Your Bid

What your bid means

2 NT  Inviting Partner to Bid Game 
3 NT  You signing off in Game
4 NT  Inviting Partner to Bid Slam
5 NT  Forcing Partner to Bid Slam (they choose small or grand slam)
6 NT  You signing off in Slam


Responses

The Acol Bidding System

*If you live in the UK, Ireland, Australia or New Zealand Acol is the most widespread system Acol has the following characteristics:
  • It is a natural system: most opening bids, responses and rebids are made with at least 4 cards in the suit bid, and most no trump bids are made with balanced hands.
  • It is a four-card major system: only four-card suits are required to open 1 or 1, unlike Standard American and many other systems where five-card suits are typically required.
  • It makes extensive use of limit bids: limit bids describe the hand so closely, in terms of high card points (HCP) and shape, that the one who makes the limit bid is expected to pass on the next round, unless partner makes a forcing bid.
  • Understanding and correct use of limit bids and forcing bids is fundamental to applying the system: all no trump bids below the level of 4NT are limit bids, as are all suit bids that merely repeat a suit already bid by the partnership; changes of suit may be forcing or not depending on the approach bids.
  • The level of the 1NT opening bid influences other bids: the normal choice is between a “weak no trump” (12–14 HCP) and a “strong no trump” (15–17 HCP).
  • All 1 of a suit opening bids then promise at least 4 cards in the bid suit
  • Notrump follow-up conventions include Stayman, Jacoby transfers Blackwood and Gerber Convention.