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SJTO.4CA
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1995-08-28
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STRONG JUMP TAKEOUT RESPONSE
The strong jump takeout, a single jump in a new suit over partner's
one level opening bid, is not used in competition. When the
opponents overcall, the weak jump takeout (see chapter WEAK JUMP
TAKEOUT RESPONSE in the book "Weak Bidding," or (if playing
negative doubles) the semi-strong jump takeout (see chapter SEMI-
STRONG JUMP TAKEOUT RESPONSE in the book "Conventional Doubles")
applies. Over a takeout double, a jump takeout is not quite
forcing, showing a strong suit in a fairly good hand (see chapter
BIDDING OVER A DOUBLE).
Opener Responder
1D 2H/2S/3C
Responder's strong jump takeout says, "I know we have a game. We
might well have a slam. I am afraid that if I do not jump on this
round I won't be able to describe my hand accurately on later
rounds." The requirements are:
-- With four card trump support for partner's suit, 3-1/2 defensive
tricks ("honor count") are sufficient, provided that a decent suit
is available for the jump (headed by KQ or better).
-- With good three card support for partner, a stronger hand or
stronger jump suit is needed. Usually four defensive tricks are
enough.
-- Without trump support for partner, a very good long jump suit
or an extremely strong hand (4-1/2 defensive tricks) is required.
The reason for the emphasis on defensive tricks instead of HCP is
that we are more interested in aces and kings for this bid, rather
than queens and jacks. With a long strong suit that can play
opposite a singleton, 3-1/2 defensive tricks are enough if controls
look good.
It is not necessary to jump on the first round just because you
have a strong hand. The main question is whether the hand can best
be described by an immediate jump or a more roundabout approach.
Some hands can never be described accurately if an immediate jump
is not made. You hold S-AKQ543 H-9 D-A32 C-J76 and partner opens
1C. If you do not bid 2S now, later bidding may be guesswork. With
a singleton ace of hearts and three little diamonds, however, just
bid 1S. A borderline jump should not have two or more fast losers
in an unbid suit.
With a hand such as S-K10874 H-A7 D-AKQ43 C-5, just respond 1S. You
can jump in diamonds on the next round, and no rebid by partner
will give you a problem. Besides, the spades are too weak for a
strong jump takeout. Other considerations:
-- Controls. If in doubt whether to jump or not, don't jump with
two or more fast losers in an unbid suit.
-- Hand description. With a three-suited hand containing four card
trump support and too much for a splinter bid, responder will often
defer the jump to the second round (especially if the first suit
to be bid is not very strong):
Opener Responder
1H 1S
2C 3D
3NT 4H
Responder has S-K1084 H-A932 D-AKQ4 C-5. He bids this way to
emphasize diamond quality. If the spades and diamonds were
reversed, he would jump immediately:
Opener Responder
1H 2S
2NT 3D
3NT 4H
Both sequences, in which responder bids three suits including a
jump, promise a singleton or void in the fourth suit. See a further
discussion of related sequences in chapter SPLINTER REBIDS BY
RESPONDER and chapter NON-JUMP SPLINTERS in the book "Marvin's
Conventions and Treatments."
Remember, however, that some jump reverses by a two-over-one
responder are splinter bids, not natural:
Opener Responder
1D 2C
2D 3H/3S - splinter bids
You can't use this sequence to emphasize the quality of a major
suit. See chapter SPLINTER REBIDS BY RESPONDER.
These are jump takeouts to 3H in response to a 1S opening:
SQ43 H-AKQ10874 D-A8 C-6
SA5 H-AKQ87 D-K6 C-K432
With S-10 H-A105 D-KQ73 C-AQ743 respond 3C to 1H, but just 2C to
1S. A jump takeout bidder should have some idea of where the hand
can play before she makes the jump.