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3NOVRMAJ.4CA
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1995-09-09
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THE 3NT RESPONSE TO A MAJOR OPENING
Opener Responder
1H/1S 3NT
The requirements are:
-- Qxxx or better in opener's suit
-- A balanced hand, no singleton or void
-- Game-going strength, 13-15 points including distribution
Opener can try for slam by bidding a singleton or void:
Opener Responder
1S 3NT
4C/4D/4H - singleton or void, slam try
Responder accepts the slam try with a good fit (i.e., no secondary
strength in opener's short suit), signs off in game with a bad fit,
bids a new suit when in doubt.
When opener's suit is hearts, there is no way to show spade
shortness without going past game:
Opener Responder
1H 3NT
4C/4D/4S - singleton or void, slam try
If responder is too strong for the 3NT bid, he can use the Omnibus
2NT response (see chapter OMNIBUS in the book "Marvin's Conventions
and Treatments").
This artificial raise applies over a double, but not over an
opposing overcall unless 3NT is a double jump (i.e., over 1S):
South West North
1H 1S 3NT - strong heart raise
4H - preemptive heart raise
2NT - Omnibus
In all other overcalling situations, a jump to 3NT is natural,
showing 16-18 HCP when negative doubles apply, 13-15 HCP when they
do not apply. When negative doubles apply, the way to show 13-15
HCP is to double and then bid 3NT. A strong major raise is shown
in one of two ways, depending on the overcall:
1) When the (preemptive) double jump raise to game is available,
a cue bid shows a strong raise to game:
South West North
1S 2C 3C - strong spade raise
3S - limit raise
4S - preemptive raise
North's 3C bid tends to deny first or second round control of
clubs, with which she can splinter.
2) When the double jump raise is not available, a (single) jump
raise to game is strong:
South West North
1S 3C 4S - strong spade raise
4C - normal cue bid
With a preemptive sort of raise to 4S, responder should just bid
3S. Even though this is not forcing, it is unlikely to be passed
when there is so much strength outstanding. Either opener or an
opponent will no doubt bid again. Bidding 3S and then 4S will
sound to the opponents like you're stretching, which may cause
them to make a wrong decision (although the opponents should be
alerted to this possibility). Of course you do not stand for a
penalty double by opener after this sort of "limit raise."
When an overcall comes at the one level, a simple cue bid is the
standard slam-interest hand with first round control of the
opposing suit. A jump cue bid is a splinter bid in support of
opener's suit, with a probable singleton:
South West North
1H 1S 2S - normal cue bid
3S - splinter bid
For appropriate action over conventional overcalls, see chapter
DEFENSE AGAINST TWO-SUITED CONVENTIONS in the book "Marvin's
Conventions and Treatments." Also see chapter BIDDING OVER A
DOUBLE in this book.