Bid | Meaning |
---|---|
2![]() | 5 hearts and an unspecified minor. |
2![]() | 5 spades and an unspecified minor. |
At unfavorable vulnerability, the minor should be 5+ cards.
Muiderberg is used in conjunction with the
The convention is also known as Lucas Two Bids (albeit with slight differences) or Dutch Two Bids.
Partner's responses are all non-forcing with the exception of an artificial 2NT or
Response | Meaning |
---|---|
Pass | Natural. |
2![]() | In response to a 2![]() |
2NT | 15+ points, artificial and asking for opener's minor. Please see full description in the next section. |
3![]() | Support for either minor and asks opener to pass or correct. Denies support for opener's major. |
3![]() | Artificial, showing 3+ card support with game-invitational strength. Opener is expected to sign off at 3-level with a weak hand, or bid game with a maximum. |
3![]() ![]() | A single raise shows 3+ card support and is non-forcing. See RONF. |
3NT | Natural, signoff. |
4![]() ![]() | Natural, signoff. A jump raise may be weak or strong, the same as with a conventional weak two bid. |
Responder's 2NT is strong and artificial, representing a variety of possible hands. It asks opener to show his minor suit.
Responder may be genuinely interested in identifying the correct minor suit strain. Or he may have game or slam aspirations in the major suit, and simply wants to know more about opener's hand.
After hearing 2NT, opener may bid as follows:
Rebid | Meaning |
---|---|
3![]() | Natural with minimum strength. |
3![]() | Natural with minimum strength. |
3![]() | Clubs with maximum strength. Forcing. |
3![]() | Diamonds with maximum strength. Forcing. |
Opener | Responder | |||||
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Opener 2 ![]() Pass |
Responder 3 ![]() |
Opener | Responder | |||||
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Opener 2 ![]() 4 ![]() |
Responder 3 ![]() Pass |
Opener | Responder | |||||
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Opener 2 ![]() 3 ![]() Pass |
Responder 2NT (1) 3NT (3) |
Muiderberg was named by its Dutch inventors Onno Janssens and Willem Boegem for their hometown.
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