Opponents Have Opened The Bidding - Take Out And Other Doubles

(1) Responses to a Take Out Double

simple bid of a suit = up to 10 pts.

1NT = 7-10. But occasionally may have a good 6 pts and an awkward hand.

2NT = 11-12.

With a choice tend to respond in a suit rather than NT's.

To respond in a minor doesn't deny a passed over Major suit, especially if the opponent's suit is in between the minor and major suits. eg. after (1H) : X : (P) : ? may decide to bid 2 of a minor then compete with 2S over the opponent's expected 2H with 4-4.

Jumpshift response = 9-11 pts and reasonable 4cM but if in a minor will always have a goodish 5c suit and 10-11 pts.(NF).

Double jumpshift response to 3-level = intermediate, a point stronger than (point 2 above) with a good 5c suit. (NF).
eg. after (1D) : X : (P) : ?  bid 3H on:  Jxx
                                          KQT9x
                                          Axx
                                          Jx.

Cue by responder = forcing to agreement, responder guarantees another bid. Thus there is no need for doubler to jump unnecessarily.
eg.  (1D) : X  : (P) : 2D     		KJxx
     (P)  : 2H : (P) : 3H = NF eg.  	QTxx
					xx
					Axx.
Continuations:

Immediate 2NT by either player is GF.

Return cue by doubler is a slam try with control of cue suit, typically 4441 hand.

Jumpshift by doubler shows strong single suited hand, too strong to overcall originally.

Jumpshift by cue-bidder shows strong single suiter, slam interest but NO control of the cue suit.

Jump cue by responder = strong single-suiter, slam interest with control of the cue suit.

(2) Further Competition after a Take Out Double

(1m) : X : (1M) :

X = penalty suggestion, 4c or &H weakish 5c suit in M.

2m = normal cue, as for (1)(d).Ignore 1M.

2M = natural, good 5c suit in M as for (1)(c).

(1C) : X : (1D) :

2C = natural over short C, o/w cue.

2D = normal cue.

X = responsive.

(b) If opponents bid 2 suits, NT guarantees a stopper in the 1st bid suit but not the second. As doubler may be a little short of an opening bid if he has good shape, ranges are: 1NT = 8-11. 2NT = 12-13.

(3) Rebids by Take Out Doubler after a Simple Response

Rebid in a M shows considerable extra strength, although not a 100% forcing. But if responder has replied 1NT, showing definite values, a rebid in a M is effectively a GF.

Rebid in a minor shows a good hand, but doesn't guarantee as much as a rebid in a M. Doubler could possibly have:
-        and after (1S) : X : (P) : 1NT
QTxx               (P)  : ?              bid 2D.
KQTxx
KJxx.
Jump rebid = GF single suiter.

Cue-bid = general GF, not a genuine single suiter.

If the doubler, through competition, is forced to make a non-jump rebid in a M at the three level then the auction is GF.

Cheapest NT = 19-21. Continuations as if rebid 1NT or 2NT in a competitive auction.

(4) When 2NT is also available as Takeout

Partner hasn't shown any values. (If partner shows values then 2NT is natural).

2NT rather than double shows extra length in the bid suit and/or four cards in the lower ranking outstanding suit. If an unbid suit can be bid below 2NT then 2NT alway show extra length in bid suit.

egs.  (1D) : 2C  : (2D) : P
      (P)  : 2NT = extra clubs and preference for H's (lower unbid)

(1D) : P : (1S) : P (2S) : P : (P) : 2NT = longer C's than H's. X = hearts at least as long as C's.

(1S) : 2C : (2S) : P (P) : 2NT = with 5c C's and 4c D's shape 2-2-4-5. ie: maybe not a 6th club.

Summary:
2NT = extra length and emphasis on lower unbid suit.
X = normal takeout, when 2NT is available shows at least equal length in unbid suits.

Same principles apply if auction at one-level and 1NT overcall can't be natural (passed hand).

(5) Other Doubles - When Opponents have opened the Bidding

(1H) : P : (1NT) : X = takeout double of 1H.

(1S) : P : (P) : X (2S) : X = penalty. 2NT = takeout.

(1H) : P : (P) : X (2H) : X = penalty. 2NT = minors.

(1NT) : P : (2C/D/H) : X = would have penalty doubled 1NT.

(1H) : P : (P) : X (2D) : X = penalty.

(1H) : 2C : (2D) : X = takeout, spades with club tolerance. 2H = cue raise. 3D = GF. With only one unbid suit the higher cue is a general GF.

(6) Opponent's Pre-empt

When opener competes over a pre-empt he assumes you have a useful 7-8 count.
After 3 of a minor - natural bidding and continuations.

X = takeout. bid = minimum opening hand 6c suit. 3NT = to play.

After 3 Major - responsive 3NT after a takeout double. (3M) : X : (P) : 3S = 0-8. 3NT = Responsive. 4m = 0-8, 5c minor. Game = 8+, 5c+ suit. 4NT = to play.

eg. with AJxx after (3H) : X : (P) : ? xx bid 3NT and continue with 4S over 4m Axx to show exactly 4cS and game going values. Qxxx

After 4C/D/H - double is takeout. Response of 4NT after (4H) : X asks doubler to pick a minor.

After 4S - double is takeout but doubler must be prepared or responder to pass on balanced hands. 4NT after (4S) : X says pick a suit. An immediate 4NT over 4S is "unconditional" takeout.

Doubling A Splinter Bid

1st Priority = suggesting a save. Otherwise (if profitable save unlikely) says lead lower unbid suit or unbid suit if only one.


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