System
The partner of the Muiderberg opener can take the following actions:
- pass (with tolerance for the opened suit)
- bid 3♣ (a pass-or-correct bid)
- bid 3♦ to invite for game in the major suit
- bid 2♠ (over 2♥) as a contract improvement (opener is allowed to raise with a suitable hand)
- bid 3♥/♠ (opener's suit) as a preemptive raise
- bid 3♠/♥ (other major) which is non-forcing but invitational
- ask for the minor suit using a 2NT relay bid with a strong hand.
The 2NT response is often defined as forcing to game, for example in Biedermeijer and AcolPlus. In particular, with a strong hand with an own 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:
- bid 3♣ with a minimum and clubs / with a four clubs
- bid 3♦ with a minimum and diamonds / with a four diamonds
- bid 3♥ with a maximum and clubs / with a five or more clubs
- bid 3♠ with a maximum and diamonds / with a five or more diamonds
- bid 3NT with 4-4 in both minors
- bid 4♣/♦ with a 6+ cards in the bid suit
Both approaches are equally popular.
In competition, 3♣ is natural (opener is expected to pass) while 2NT asks for opener's minor suit and is not necessarily strong. Further, 4♣/♦ are defined as fit-bids in competition.
Read more about this topic: Muiderberg Convention
Famous quotes containing the word system:
“Books are for the most part willfully and hastily written, as parts of a system to supply a want real or imagined.”
—Henry David Thoreau (1817–1862)
“Authority is the spiritual dimension of power because it depends upon faith in a system of meaning that decrees the necessity of the hierarchical order and so provides for the unity of imperative control.”
—Shoshana Zuboff (b. 1951)
“While the system of holding people in hostage is as old as the oldest war, a fresher note is introduced when a tyrannic state is at war with its own subjects and may hold any citizen in hostage with no law to restrain it.”
—Vladimir Nabokov (1899–1977)