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Moscito Byte

GENERAL METHOD: Moscito byte (major-oriented strong club)

General description and suggested defences

TWO OVER ONE: Artificial, or natural nonforcing, depending on sequence

VERY LIGHT: Openings (1st/2nd only)

FORCING OPENING: 1C

NOTRUMP OPENING BIDS

STRENGTH OF NOTRUMP REBIDS

MAJOR OPENINGS

MINOR OPENINGS

OTHER OPENINGS

OTHER CONVENTIONAL CALLS:

NOTRUMP OVERCALLS

SIMPLE OVERCALL

JUMP OVERCALL: weak

OPENING PREEMPTS: light

DIRECT CUEBIDS

DEFENSE VS. NOTRUMP

OVER OPPONENT'S T/O DBL

VS. OPENING PREEMPTS

SLAM CONVENTIONS: Gerber, RKCB (D0P1)

General Description of Moscito and Best Defenses

System design: Moscito was designed around the idea of getting into and out of the auction quickly, primarily in a major.

The opening bid structure reflects this:
15+ open 1C; all other openings are generally 8-14
both majors open 1S
hearts only open 1H
spades only open 1D
no major, balanced, open 1N (11-14)
no major, unbalanced, open longer minor naturally at 2 level

The basic idea is to determine quickly whether or not game values exist. If so, you explore for game or slam carefully. If not, you find a 7+ card major suit fit and sign off as quickly as possible.

The system is designed to maximize the pressure on the opponents.

Suggested defense: In making the following suggestions, I have tried to cater to the fact that implementing new bidding systems is difficult, and have therefore tried to make suggestions that will allow people to leverage their existing understanding to the maximum extent possible.

Opening bid Suggested defense:

1C treat as strong club
1D X = weak t/o X of 1S, 1S = stronger t/o X of 1S. Other calls unchanged
1H unchanged; probably make t/o X more aggressively than previously
1S unchanged, although you might want to make t/o X guarantee both minors
1N treat as weak NT
2C treat as precision 2C opener, or as weak two
2D treat as weak 2

More sophisticated defenses are certainly possible, especially to 1D.  But remember that this is not a FERT system: 1D isn't a random catchall. It is a very specific hand -- 8-14 HCP, spades without hearts. Its frequency as such is much lower than the 1D bid in a FERT system.

Other defensive remarks: The most important thing is to beef up competitive bidding generally. Playing against Moscito will result in far fewer uncontested auctions than when playing against Standard American.

Later bidding: Many of responder's initial actions are artificial. In most cases, the artificial bids are only made with strong hands, although there are some exceptions (e.g., 1D-1H is a general waiting bid). I would suggest:

1. If responder's action is natural, treat it normally.
2. If responder's action is artificial, pretend that it didn't happen. Double is t/o of opener's known suit, other calls natural.

Again, this is not the best defense possible, but has the advantage of relative simplicity.

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