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=====Development after 2Diamonds=====
  
Here is where the opening of 1N with 4441 and a singleton A or K comes into play. We never have a singleton A or K when we open 2\D. Why is this important? Because it helps the responder evaluate his hand.  

The 2\D opening shows 2 kinds of hands: 

  * 11 - 16 HCP 4441 or 5440 where the short suit is a minor and the five-card suit (if any) is a minor
  * 11 - 16 HCP 4441 where the singleton is a major
  * <del>12+ - 16 HCP 4441 where the short suit is a major  </del> 

The responses are: 

  * 2\H - relay 
  * 2\s - sign-off
  * 2N - Asks for the short suit to be bid
  * <del>2N game force (artificial) </del>
  * 3-suit - force unless the opener's singleton (then it is a sign-off)  

**Opener's rebids after 2\D - 2\S**

The opener passes unless he is short in \ss; in that case, he bids 2N.


**Opener's rebids after 2\D - 2N** 

Opener bids his short suit. Responder now sets the trump suit. 

**Opener's rebids after 2\D - 3 suit**
  

Opener bids his short suit with a fit; passes with a singleton or void. 

**Development after 2\D - 2\H (relay)**

|2\S shows a singleton major |||
| |2N asks which major is short ||
| | |3\C Short \H Now 3\H gets two step answer showing strength --- //[[John@Kinn.Org|John Kinn]] 2021/04/07 11:21// With maximum strength, zoom into control showing rebid. |
| | |3\d Short \s and a minimum| 
| | |3\H Short \S and a maximum| 
| |3\c/3\d signoff|| 
| |3\H/3\S not defined ||
| |3N to play ||
|2N shows short \C |||
| |3\C Asks size. Step 1 & 2 = min, Step 3 & 4 = max. Steps 2 & 4 show a void ||
| |3\D/3\H signoff ||
| |3\S mildly encouraging (didn't bid 2\S first) ||
|3\C shows short \D|||
| |3\D Asks size. Step 1 & 2 = min, Step 3 &4 = max. Steps 2 & 4 show a void||
| |3\H Signoff ||
| |3\S mildly encouraging (didn't bid 2\S first)  ||

**Further development of 3 suited hands** 

After the opener has shown shape and size, the only forcing bids by the responder are bids in the short suit:  

The first "cue" bid gets controls by steps 

  * step 1 = 3 controls  
  * step 2 = 4 controls  
  * step 3 = 5 controls  
  * step 4 = 6 controls  
  * step 5 = 7 controls  
  * step 6 = 8 controls  

The second "cue" bid gets queens by steps like Blackwood (singleton Q does not count) 

  * step 1 = 0 queens  
  * step 2 = 1 queen  
  * step 3 = 2 queens  
  * step 4 = 3 queens  

The third "cue" bid is to play.
   
<html><a name=d-enemy></a></html>
**Competitive auctions after 2\D**
  
The enemy overcalls 2\D directly 

  * They double  
    * Pass = poor hand with Diamond tolerance  
    * Redouble = good hand with Diamond tolerance
      * Over either the pass or the redouble, the opener is expected to rescue himself by bidding 2\H if his short suit is \D. 
    * Other calls retain their meaning
  * Overcalls of 3\c or 3\d
    * Double = conditional penalty i.e. opener passes unless that is his short suit
    * 3 major is forcing. As a response opener 
      * bids next step (3\s over 3\h, 3N over 3\s) w/ no fit
      * raises with a fit and no extras
      * All other bids show fit, extras, and shows short suit (3N over 3\h shows \s shortness)
    * 3N = to play
  * Overcalls of 2\h or 2\s
    * Double = conditional penalty i.e. opener passes unless that is his short suit
    * 2N asks for the short suit
  * Overcall of 2N.  Double is for penalty, other calls are not defined
  

The enemy overcalls the 2\H or 2N relay 

  * They double
    * Re-double = penalty  
    * Pass is undefined  
    * Other calls retain meaning 
  * 3 minor
    * Double is penalty
      * After this a new suit by the responder is forcing (raise with a fit, next step with shortness) 
    * Suit - 5 cards, void in enemy's suit
    * Pass = 4441 singleton in enemy's suit
      
 Over other calls, just do the best you can