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Quantitative notrump bids information


In natural bidding systems most notrump (NT) bids are made with balanced hands and within a narrowly defined high card point (HCP) range. In these systems, such as Acol and Standard American, NT bids are limit bids and therefore are not forcing. Bearing in mind the need to bid only to the optimum contract and no higher, bids above game are made only in specific circumstances, one of which is to alert partner to the fact that a slam may be possible and inviting partner to take part in the decision-making process.

  • Before looking at the detail, it is necessary to understand that bridge theory and practice suggest that the HCP method of hand evaluation, together with common sense concerning balance and cover in all suits, is the best for deciding the level of NT contracts, thus:
    • 25+ HCP is sufficient for a game 3NT
    • 33+ HCP should yield 12 tricks
    • 37+ HCP will probably produce a grand slam
  • Assuming a weak NT bidding system, for example Acol, this is how quantitative bids work:
    • An opening bid of 1NT shows 12, 13 or 14 HCP.
      • If responder has 21 HCP, then a small slam looks certain (21 + 12 opener's minimum = 33) and should be bid.
      • If responder has 18 HCP or less, then even a small slam is not possible (18 + 14 opener's maximum = no more than 32)
      • If responder has 19 or 20 HCP, then a small slam is a possibility but more information is needed about opener's hand before it should be bid. This is where a quantitative bid should be made. A bid of 4NT "invites" opener to:
        • bid 6NT with a maximum holding of 14 HCP (19 + 14 = 33 which is sufficient)
        • pass with a minimum 12 HCP (20+ 12 = only 32)
        • with partnership agreement, bid 5NT holding 13 HCP - asking partner to bid 6NT with 20 HCP and to pass holding 19 HCP.
    • An opening bid of 2NT shows 20, 21 or 22 HCP.
      • If responder has 13 HCP, then a small slam looks certain (13 + 20 opener's minimum = 33) and should be bid
      • If responder has 11 or 12 HCP, then a small slam is a possibility but more information is needed about opener's hand before it should be bid. This is where a quantitative bid should be made. A bid of 4NT "invites" opener to:
        • bid 6NT with a maximum holding of 22 HCP (11 + 22 = 33 which is sufficient)
        • pass with a minimum 20 HCP (11+ 20 = only 31)
        • with partnership agreement, bid 5NT holding 21 HCP - asking partner to bid 6NT with 12 HCP and to pass holding 11 HCP.
    • When responder is even stronger and is considering whether a small or grand slam is better (and only these two options), then the initiating bid is 5NT (not 4NT)
  • Similar bids can be made using a strong no trump bidding system, for example Standard American, by adjusting the HCP count accordingly

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Quantitative notrump bids

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and that a 2♣ bid can be used for all strong hands, leaving other two-level opening bids for other purposes (for example, weak two bids). The strength...

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of a bid is not generally very useful, it is profitable to agree that it means something somewhat opposite. That is, while natural notrump bids show a...

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situations: by responder after an opponent's overcall of a one notrump (1NT) opening bid in order to compete further in the auction without necessarily...

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suit transfers (bids of 2♠ and either 2NT or 3♣ over 1NT respectively require the 1NT bidder to bid 3♣ and 3♦) and Texas transfers (bids of 4♦ and 4♥ respectively...

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alternative is to use the forcing notrump. A third possibility (and the one recommended when the convention was introduced) is to bid 2♣, then rebid three of the...

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Romex system

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meanings attributed to certain bids, such as the dynamic one notrump and the Mexican two diamonds. The dynamic one notrump opening indicates either: a balanced...

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Cue bid

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Splinter bid

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conventions including the Baron Three Clubs, the Baron Notrump Overcall, the Baron Two Notrump Response and the Baron Two Spades and Three Spades. The...

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Takeout double

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bid 3NT Typically doubles of notrump bids are for penalty, the exception is when opponents make a "dustbin" notrump bid: In this case, responder is not...

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Psychic bid

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Cappelletti convention

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to compete or interfere in the auction when an opponent has opened one notrump (1NT). Usually attributed to Michael Cappelletti and his longtime partner...

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Meckwell convention

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convention. Meckwell is a method for defending against an opposing strong one notrump (1NT) opening by intervening in the direct and passout seats. It features...

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Texas transfer

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Preempt

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their own, or fail to find any. A preemptive bid often has the aim of a save, where a partnership bids a contract knowing it cannot be made, but assumes...

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Landy convention

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one notrump (1NT) opening. Landy is a 2♣ overcall of the opponents' 1NT opening to show at least four cards in each of the major suits; all other bids are...

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Gambling 3NT

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minimum. The bid has the dual objectives of preempting the opponents' bidding should they hold the majors and trying for a game in notrump on the gamble...

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Negative double

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Forcing notrump

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