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REBBYOPR.4CA
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1995-09-09
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REBIDS BY OPENER
See SPLINTER REBIDS BY OPENER for a discussion of splinter rebids.
After a One-Over-One Suit Response
Opener Responder
1C 1H
A 1NT rebid by opener shows 13-15 HCP, balanced hand (a singleton
honor in responder's suit is sometimes acceptable).
A hand that has opened a three-card suit with a minimum hand that
cannot raise the one-over-one response must rebid 1NT. After
opening 1C with S-AQ87 H-983 D-J76 C-AQ9 opener rebids 1NT after
a 1D or 1H response. A 1S rebid could result in a non-forcing 3C
jump preference by responder, which opener would have to pass.
Rebidding 1NT avoids this embarrassing situation, because a 3C
rebid by responder is forcing after a 1NT rebid (see chapter
CHECKBACK STAYMAN BY RESPONDER in the book "Marvin's Conventions
and Treatments").
Should you raise partner or rebid 1NT when holding adequate trump
support for his suit? With a weak 4-3-3-3 hand the 1NT rebid is
preferable. With 15 HCP, however, the raise should be given if the
suit is a major, since a raise is more forward-going than a 1NT
rebid. Partner might give up on game over 1NT, but try for game
after a raise. Always prefer a 1NT rebid when the response is 1D.
Raise partner's heart response or rebid 1S? With adequate trump
support for hearts and a near-minimum the raise is usually
preferable. One reason is that a jump preference would have to be
passed, even with heart support:
Opener Responder
1C 1H
1S 3C
A 3H bid by opener at this point is an acceptance of the game try,
forcing, since the 3C raise is only invitational. It's better to
raise a 1H response with S-AJ76 H-K83 D-54 C-AJ54. If opener does
bid 1S over 1H with a minimum and three hearts, as he would with
S-AJ76 H-983 D-54 C-AK54, then he must pass a jump preference of
3C and hope that clubs is a better spot than hearts.
A simple rebid in a new suit is non-forcing:
Opener Responder
1D 1H
1S/2C - not forcing
A reverse is forcing if responder's suit is five cards or longer.
It requires a good hand (at least 16 HCP), of course, since
responder must go to the three level if she prefers the first suit,
but it does not promise another bid if responder makes a discourag-
ing or merely invitational rebid. See REBIDS BY RESPONDER for a
discussion of bidding sequences after a reverse.
A jump rebid of 2NT shows 19-20 HCP, but a good suit counts for a
point or two. It is not forcing, and Stoplight (described in the
book "Marvin's Conventions and Treatments) applies. Responder
passes only with a hand she is ashamed of, one that is not suitable
for Stoplight if that convention is being used.
A jump rebid of 3NT shows too much for a 2NT rebid, either in
playing strength or HCP. It denies adequate trump support for
responder's suit, because we open 2NT with 21 HCP and something in
every suit.
Jump raises and jump rebids in the same suit are invitational, not
forcing. Again, responder usually bids again if not ashamed of the
original response, especially after a jump raise.
Jumps in a new suit are forcing to game.
See also THE DOUBLE JUMP REBID IN A MINOR.
After a 1NT Response
Opener Responder
1 any 1NT
-- Except for reverses, a 2S, 2H, or 2D rebid is weak.
-- Reverses by opener are strong but not forcing.
-- With an invitational hand, opener raises to 2NT or bids 2C
(See chapter CHECKBACK STAYMAN in the book "Marvin's Conventions
and Treatments") and then invites.
-- All jump rebids by opener are forcing to game.
-- Gerber is not used (4C is a splinter rebid after a 1NT re-
sponse).
After a Single Raise
Opener Responder
1C 2C
1S 2S
Opener's bid of a new suit is forcing after a raise, but a rebid
of 2NT is not forcing. Responder can pass 2NT with only three-card
trump support for a major, a balanced hand, and a minimum. She may
pass 2NT with four-card support for a minor and a minimum if her
hand is suited to a notrump contract. When opener rebids 2NT a new
suit by responder is not forcing, weak, with a long suit. When
opener rebids in a new suit, responder's new suit bid is forcing
and may only show a stopper for notrump.
A 1-2-3 sequence is invitational in a major, preemptive in a minor.
For actions when opener's RHO bids over the raise, see chapter
ACTION DOUBLES in the book "Conventional Doubles."
After a 2NT Response
Opener Responder
1 any 2NT
See chapter OMNIBUS in the book "Marvin's Conventions and Treat-
ments," or if responder is a passed hand, RESPONSES BY A PASSED
HAND in this book and chapter STOPLIGHT in "Marvin's Conventins and
Treatments."
If not playing Omnibus, opener makes the rebid that best describes
his hand. Any three-level suit bid is forcing, but a jump to game
in the same suit is not invitational. If responder is a passed hand
opener's rebid of his suit is a sign-off, but a new suit is
forcing.
After a Strong Jump Takeout Response
Opener Responder
1C 2D/2H/2S
Opener usually raises immediately with J10x or better in respon-
der's suit. Don't raise immediately with three small, even with a
singleton or void outside. Bid something else instead, then raise
strongly. Such a delayed raise, even a jump, tends to deny the
trump holding required for an immediate raise, which means that it
is usually based on small cards. If the immediate single raise
would be a game bid, however, you can bid something else before
raising--even with good trump support:
Opener Responder
1S 3H
4C 4S
5H/6H
Responder realizes that opener could have better than xxx in
hearts, since opener obviously had too much strength for a raise
to 4H, which could end the auction.
Opener should avoid rebidding in a new suit that lacks the ace or
king. With a singleton in responder's suit and a very weak opening,
a notrump bid may be preferred when there is no good suit rebid to
make. A 3NT rebid after a three-level jump says, "Bad hand!" Avoid
this bid if you have anything extra, because it is not forcing.
See RESPONSES BY A PASSED HAND for rebids following a jump takeout
by a passed hand.
After a Two-Over-One Response
Opener Responder
1S 2C/2D/2H
A 2NT rebid shows extra values, about 15-16 HCP.
A 3NT rebid shows too much for a 2NT rebid.
A jump rebid in the same suit is highly invitational.
Reverses are forcing, but do not promise another bid in all
circumstances. See REBIDS BY RESPONDER for a full discussion of
reverse bid sequences.
A jump reverse is a splinter bid, as is a double jump in a new suit
or a single jump to four of a new minor. See SPLINTER REBIDS BY
OPENER.
A new suit at the three level is forcing, and promises another bid
even if responder merely rebids his suit:
Opener Responder
1S 2D
3C 3D - forcing
A raise of partner's minor response is not forcing. It does show
extra values, but two of the top three honors or four-card support
counts as "extra values" in a pinch.
Opener Responder
1S 2C
3C
Opener has S-KJ543 H-42 D-K32 C-AQ2. If the response had been 2D,
he would have rebid just 2S with this minimum hand. See chapter
MARVELOUS TWO DIAMONDS in the book "Marvin's Conventions and
Treatments" for a partial solution to this problem.
Opener Responder
1S 2D
3D
Opener is usually strong, but could have a minimum 4-3-4-2 hand:
S-AK76 H-A63 D-J952 C-82.
Opener Responder
1H 2D
3D
Opener will often have to make this bid with a minimum hand and 4-4
in the red suits. Responder should tend to bid conservatively until
opener confirms a good hand.
Opener Responder
1D 2C
3C
Opener will usually have extra values. With 4-4 in the minors and
a minimum opening, he might have opened with 1C to avoid this
situation. He could, however, have 5-4 in the two suits (or very
good three-card club support) and a minimum hand.
The raise of a 2H response to 3H does not imply extra values, with
which opener should bid 4H. This is one case where a jump raise may
not be all that strong.
If responder is a passed hand, then a raise of any two-over-one
response definitely shows extra values, without which opener could
just pass.
A jump raise of a minor suit response is forcing to game:
Opener Responder
1S 2C
4C
If responder bids 4NT after this raise, he just wants to play
there; he is not asking for aces. He might have a hand such as
S3 H-J1098 D-QJ97 C-AQ97, a little too good for a 1NT response.
After a Business Double
South West North
1S 2C/2D/2H Dbl
See BUSINESS DOUBLES OF OVERCALLS.
After a Negative Double
See chapters NEGATIVE DOUBLES OF SIMPLE OVERCALLS, NEGATIVE DOUBLES
OF JUMP OVERCALLS, and NEGATIVE DOUBLES OF HIGHER OVERCALLS in the
book "Conventional Doubles."
After a Pass
When opener's partner passes an overcall, opener should not reopen
with a double unless he is prepared for any action responder might
take, including a pass.
We do not automatically reopen, but it is very unusual to sell out
to a one-level overcall, especially at match point scoring. The key
is to look at the length in the opposing suit. With four cards, it
becomes very unlikely that partner has passed much of a hand, so
a sellout becomes more attractive.
Opposite a passing partner, it is unwise to make a free bid without
extra values when partner has another chance to act:
South West North East
1S 2C Pass 2D
2S
Bidding 2S with a minimum hand and five spades is very dangerous,
although one might bid 2S with six good spades and nothing extra
when not vulnerable. Bidding 2H with a 5-5 hand is almost automa-
tic at match point scoring, however, even with a minimum.