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The 2NT response is often defined as forcing to game, for example in Biedermeijer and AcolPlus. In particular, with a strong hand with a good suit of its own or with support for partner's opened suit, responder must bid 2NT first, as there is no other way to establish a force. The Muiderberg opener can respond in several ways to the 2NT answer:
When an opponent opens the bidding with 1 ♥ or 1 ♠, the immediate overcall of 2NT shows at least 5–5 in the minor suits (that is, at least five clubs and at least five diamonds). If the right hand opponent (RHO) of the partner of the 2NT bid passes, that partner is expected to bid the minor suit that he prefers at the three-level.
2NT is natural and invitational (showing about 18 HCP) three of a new suit (jump shift) is natural, normally agreed to be game-forcing, and shows about 19 points or more; When opener does not have a six-card original suit nor a four-card lower-ranking second suit, she will have to bid a short suit. Normally, she bids her three-card minor.
(With the opposition opening 1NT it is unlikely you would want to go beyond 3NT if the Cappelletti suit is a minor). In this scenario, a Cappelletti bid from Intervener of, for example, overcall 2 ♥ shows Advancer that partner has 9-14 HCP in a hearts suit and also another undisclosed 4 card minor suit.
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.
In most strong club systems, the opening bid of 2 ♣ is natural and promises a hand with long clubs (for example, in both Precision and Blue club, it shows 11-15 high card points and either a 6-card club suit or at least a 5-card club suit and a 4-card major suit). As such, it makes overcalls more difficult, since they have to be made at the ...
The weak two bid is a common treatment used in the game of contract bridge, where an opening bid of two diamonds, hearts or spades signifies a weak hand, typically containing a long suit. [1] It may be deployed within any system structure that offers a forcing artificial opening to handle hands of (eg) 20+ points, or an expectation of 8 or more ...
It is a natural bid, used to show a hand that is too strong to open at the one level. Commonly used in the early days of bridge, most expert players converted after World War II to the now more common weak two bid [2] retaining only 2 ♣ as a strong opening suit-bid and changing its meaning to artificial and forcing holding any suit. This was ...