STRONG 2♣ OPENING

2/1 system reserve 2♣ opening for strong hands that obey the follow conditions:
- need 21+ hcp (high cards points);
- limited in 3 losers when the minor is the long suit;
- limited in 4 losers when the major is the long suits.
There many hands that are not qualified or recommended to be an opening in 2♣, like:
♠AKQJxxxxxx ♥x ♦x ♣x (3 losers) or
♠AKQ7 ♥AKQ7 ♦K763 ♣9 (21 hcp) or
♠AKQ ♥AKQ ♦Q63 ♣Q932 (22 hcp) or
♠7 ♥J7 ♦AKQJ3 ♣AKQJ9 (21 hcp).
- 2♣ opening may not necessarily be a GF if Responder bids 2♥, because this is an artificial response that denies Aces, Kings and 2 Queens and shows less than 5 hcp. Thus, after 2♥, maximum negative, the bidding can be stop at 2NT or in a suit at level 3, in situations where Responder's hand are very poor like: ♠954 ♥7x ♦J742 ♣9743 and Opener's hand are:
 ♠AKQ ♥AKx ♦AKx ♣43 / ♠AK ♥AQJ63 ♦KQ2 ♣A43 / ♠K3 ♥AQ6 ♦K3 ♣AKQJ10  

Note1: there are unbalanced hands with 21-22 hcp that are no eligible for 2♣ opening because they have more than 4 losers and are not semi-balanced hands qualified to be opened in 2NT.

For analyze 2♣ convention let’s separate 3 types of hands:
1- balanced hands distribution: 4333 or 4432 or 5332 with 22-29 hcp;
2- unbalanced hands with 21+ hcp having singleton or void, including some semi balanced hands having 5422 or 6322 distribution;
3- strong 3 suits in 4441 distribution with 22-27 hcp.

1) Balanced hands - Opener's second bid
After a bidding with no interference 
Opener   Responder
   2♣        2♦ <= waiting and GF (game forcing)
    ? => Opener's second bid shows the ranges:
  2NT => 22-23 hcp,
  3NT => 24-25 hcp,
    3♥ => 26-27 hcp - artificial bid - nothing with ♥
  4NT => 28-29 hcp

Opener   Responder
   2♣        2♥ <= maximum negative
    ? => Opener's second bid shows the ranges:
  2NT => 22-23 hcp,
  3NT => 24-29 hcp,
 
Note2: The balanced hands with 26-27 hcp or 28-29 hcp after 2♥ response should be bided as sign-off in 3NT (you don’t need to show exactly the range in hcp you have).

After Opener bids a balanced suit hand the captain (the player that defines the final contract) is the Responder and after 3NT he may ask for major in 4♣ Stayman or making transfer in 4♦=>4♥ or 4♥=>4♠ or 4♠=>5♣ or 5♣=>5♦.
In unbalanced hands generally it is the strong hand that defines the final contract, but a collaboration bidding is always necessary as maximum possible. So, when a player self-considers well known to take the final decision, he should finish the bidding. 

2) Unbalanced hands - Opener's second bid
Opener Responder 
 2♣        2♦ <= waiting and GF
  ?  => Opener bids unbalanced hands:
 2♥ => 5♥+ cards 
 2♠ => 5♠+ cards
 3♣ => ♣6+ cards mostly
 3♦ => ♦6+ cards mostly 
Note3: If partnership play Stayman in 2NT then Opener with 5332 may bid his 5-card major after 2♦, but if partnership play Puppet or Muppet (recommended) Opener with 22-23 must bid 2NT to clarify better his hand.

3) 3 suits 4441 22-27 hcp
Opener Responder 
 2♣        2♦ waiting and GF
  ?
 3♠ <= 4441 singleton Clubs
4♣ <= 4441 singleton Diamonds
4♦ <= 4441 singleton Hearts
 4♥ <= 4441 singleton Spades
If the singleton suit is an Ace then the hand should be bid as 3NT.
 After Opener jump the captain is the Responder and 4NT by Responder is to play.
A bid in the Opener’s singleton suit ask for controls (A=2 K=1) in 4 steps:
step1 = up to 6 controls
step2 = 7 controls
step3 = 8 controls
step4 = 9 controls (maximum controls possible)
A singleton K or singleton Q should be count as no value card.
A second bid in Opener’s singleton suit ask for the number of Queens in 3 steps:
step1 = up to 2 Queens
step2 = 3 Queens
step3 = 4 Queens
In these sequences any suit bid by Responder is sign-off.

4) 3 suits 4441 22-27 hcp
Opener Responder 
 2♣        2♥ (max negative)
  ?
3♥ <= 4441 singleton Spades
3♠ <= 4441 singleton Hearts
4♣ <= 4441 singleton Diamonds
4♦ <= 4441 singleton Clubs
 Responder may pass – not GF because Responder’s hand may have long suit in the Opener’s singleton suit and this is a misfit hand.

===========================

Opener's second bid after 2♥ response allow Responder to pass in 2♠, 2NT, 3♣ or 3♦ or 3♥. Thus, after a 2♥ response Opener having 9 tricks in No Trump, or 10 tricks in a major suit, or 11 tricks in a minor suit, must jump directly to game to avoid a possible pass from Responder that has nothing to bid with 4333 or 4432 distribution hand and up to 2 hcp. But if Opener has 3 suits in distribution 4441 he must explain that to Responder take decision.

Important: after a 2♦ undefined response or 2♥ maximum negative response, Responder priority is to support Opener suit or bid a suit only with 5+ cards, otherwise Responder must bid No Trump up the line to show 4432 or 4333 or 4441. 

An opener having two long suits (6-5 hands) should have his opening in level 1 even with 3 losers avoiding a big problem to show both suits after response in 2♥ - that allow Responder to pass in a part score level or if opponents interfere in level 3 or even in level 4 with a preemptive bid and Responder double to show a negative hand. 

Opener Responder
  2♣        2♦     <= the waiting bid is GF with an undefined hand that must have 5+ HCP or unless a King or an Ace. So, with xxx Kxx xxxx xxx or Axx xxx xxx xxxx or Qxx xxx Q10xxx xx those hands with less than 5 hcp are eligible to be bided as 2♦.
In fact the 2♦-response bid exclude a possible 5+ cards major suit with 2 top honors or a weak hand with 6/7 cards and only an Ace or King.

Note4: Is well known in bridge that a King is 1 control, and an Ace is 2 controls, so we say that a hand without any control is candidate to be a response in 2♥ after 2♣ opening mainly if it is a 4333 hand.

Opener's second bid with balanced hands
Opener Responder
 2♣         2♦
  ?
a) 2NT = 22-23 hcp, in this case Responder need use the same convention that partnership uses when the Opening is in 2NT. Normally:
3♣ asking for major;
3♦ transfer to 3♥;
3♥ transfer to 3♠;
3♠ Stayman for minor and Opener should bid 3NT without a minor suit;
4♣ Gerber (asking for aces: 4♦=4, 4♥=1, 4♠=2, 4NT=3) is a reserve bid for special cases  when Responder has zero Aces but good cards sequences in a minor suit like:
  ♠x ♥x ♦KJxx ♣KJ87xxx or ♠Kx ♥x ♦Qxx ♣K1098xxx
and needs 3 Aces in Opener's hand to try slam.
After the Opener response for a Gerber asking for aces the following all bids by Responder are sign-off: 4NT, 5♣ or 5♦ and any slam bided.
The follow bids are transfers after 2NT:
4♦ transfer to 4♥ showing a very weak hand  5/6 cards no good to slam;
4♥ transfer to 4♠ showing a very weak hand  5/6 cards no good to slam;
4♠ transfer to 5♣ showing a weak hand - only one Ace or King possible;
5♣ transfer to 5♦ showing a weak hand - only one Ace or King possible.
After a transfer for major Responder bidding 4NT is RKB0314 in the major bided by Opener.

b) 3NT = 24-25 HCP, Responder bids: pass, 4♣ Stayman and if Opener denies major then 4NT is sign-off, 4♦/4♥ transfers to majors, 4♠ transfer to 5♣, 4NT Blackwood for Aces, 5♣ transfer to 5♦;

c) 3♥ = 26-27 HCP, Responder bids: 3♠ relay to 3NT (possible sign-off), 4♣ Stayman, 4♦/4♥ are transfers to majors, 4♠ transfer to 5♣, 4NT Blackwood for Aces, 5♣ transfer to 5♦;  

d) 3♠ = 4441 with singleton in Hearts 22-27 HCP and Responder become the captain.

Note5: When Responder is asking for a major in 4♣ (Stayman), it is possible that Responder has both majors or a 5431 distributional hand and he is trying a better contract in suit avoiding to play in No Trump with a singleton.
So, if Opener bids 4♦ = no major, then Responder biddings his 5card-major is sign-off.
With just one long major Responder makes transfer.  Example:
Opener                       Responder
   2♣                             2♥ => bust ♠98543 ♥10654 ♦843 ♣3  
  3NT <= 25-26 HCP   4♣ <= asking for major (5431)
   ?..........................    ?
   4♦ <= no major      then 4♠/4♥ is sign-off with 5 cards
   4♥ <= 4♥ cards       pass <= also have 4♥ cards
   4♠ <= 4♠ cards       pass <= also have 4♠+ cards 
   4NT <= solid minor suit with a total of 10 tricks - sign-off   

Note6: After 2♣ response 2♥, when Opener's second bid is 3NT (24-25 hcp), if Responder's hand is to play in Clubs (or in Diamonds) and not in no trump (no entry), a transfer bid is necessary and is bided in 4♠ transfer to 5♣ or 5♣ transfer to 5♦,
example:
.....Opener:  ♠AK9 ♥AJ8 ♦AQ75 ♣AK
Responder:  ♠98 ♥5 ♦8432 ♣1076543   
Opener  Responder
   2♣        2♥ <= max negative
  3NT      4♠ <= transfer to 5♣
   5♣       pass

POSITIVE RESPONSES - Responder's first bid
After strong 2♣ open, a positive response traditionally shows 3+ controls (A and K or 3K), but in modern bidding it is more important systematize a positive response with a good suit having 2 top honors (AK/AQ/KQ) and 5+ cards for a major suit or 6+ cards for a minor suit, examples:
Opener  Responder
  2♣         ?
      2♠ => ♠KQJ1087 ♥Jx ♦Q10xx ♣x or  ♠AQ1087 ♥Jx ♦K9xxx ♣x
      2nt=> ♠Q7 ♥AQJxxx ♦xxx ♣xx or ♠87 ♥KQJxxx ♦Qxxx ♣x
      3♣ => ♠K7 ♥Jxx ♦xx ♣AQ109xx or ♠7 ♥Q10x ♦xx ♣KQ10xxxx
      3♦ => ♠87 ♥Qxx ♦AKQxx ♣xx or ♠1087 ♥Jx ♦KQJ9xxx ♣x

Note7: After 2♣ opening the positive response for Hearts is made in 2NT, and it allows the transfer for the strong hand when Opener has 3♥+ cards.

Special Weak Responses After 2♣ Open - Responder's first bid
A weak long suit up to 5 hcp with 6/7 cards could be clarified in the bidding with a jump response. So, for a major suit with 6 cards the jump is to level 3 and with 7 cards is to level 4, but the requirement is the suit must have a top honor with K or A, of course never both together and the long suit cannot include the Queen (AQ or KQ because then is a positive hand), and nothing more. For a minor suit the jump is only at level 4 with 7 cards. Examples: 
Opener  Responder
  2♣       ?
          3♥=> ♥KJxxxx or ♥A109xxx just A or K and 6 cards:
             ♠xx ♥KJ10xxx ♦xxx ♣Jx or ♠xx ♥A109xxx ♦xx ♣xxx  
          -----------------------------
          3♠=> ♠KJxxxx or ♠A9xxxx just A or K and 6 cards:
              ♠KJ10xxx ♥x ♦xxx ♣Jx or ♠A109xxx ♥xxx ♦xx ♣xx
          -----------------------------
          4♥=> ♥KJxxxxx or ♥A98xxxx just A or K and 7 cards:
              ♠xx ♥KJ9xxxx ♦xx ♣Jx or ♠xx ♥A10xxxxx ♦x ♣Jxx  
          -----------------------------
          4♠=> ♠KJ9xxxx or ♠A1098xxx just A or K and 7 cards:
              ♠AJ10xxxx ♥xx ♦xx ♣Jx or ♠K109xxxx ♥xxx ♦x ♣Jx
          -----------------------------
          4♣=> ♣KJ98xxx or ♣A109xxxx just A or K and 7 cards:
              ♠xx ♥x ♦xx ♣KJxxxxx or ♠xx ♥xxx ♦x ♣A109xxxx    
          -----------------------------
          4♦=> ♦KJxxxxx or ♦A1098xxx just A or K and 7 cards:
              ♠x ♥xx ♦AJ87xxx ♣Jxx or ♠xx ♥xxx ♦KJ10xxxx ♣Jx
  
Rules During The Development of The Bidding After Response 2♦/2♥

Rule#1: When Opener's second bid shows a unbalanced hand 2♠/2♥/3♣/3♦ If Responder first bid was 2♦ then Responder's second bid raise is more strong than a jump support, but if Responder first bid was 2♥ then it is the opposite, because the GF is dubious, and the jump shows the maximum of the negative 2♥ with some good distributional hand to game.

Opener Responder
  2♣      2♦
   ?        ?
  2♠      3♠ => slam ?
  2♠      4♠ => very weak 3♠ 
  2♥      3♥ => slam ?
  2♥      4♥ => very weak 3♥
  3♣      4♣ => slam ?
  3♣      5♣ => weak 3/4♣
  3♦      4♦ => slam ?
  3♦      5♦ => weak 3/4♦

Opener Responder
  2♣       2♥
   ?         ?
  2♠      3♠ => very weak
  2♠      4♠ => max of negative
  3♥   pass=> very weak no fit
  3♥      4♥ => max of negative
  3♣    pass=> very weak no fit
  3♣      4♣ => max of negative
  3♦    pass=> very weak no fit
  4♦      4♦ => max of negative


Rule#2: After the Opener second bid in 2♥ or 2♠ Responder should bid other suit only with 5+ cards. So, with a 4432 hand he should bid 2NT having up to 7 hcp and 3NT with 8-10 hcp and may have singleton in the Opener suit:
Opener Responder      Opener Responder
 2♣         2♦                     2♣        2♦
 2♥         2♠                     2♥        2NT
when responder has:   When Responder has: 
♠J9872 ♥Jx ♦Q7x ♣K9x   ♠J987 ♥Jx ♦Q9x ♣Kx
 

Opener Responder       Opener Responder
 2♣         2♦                     2♣        2♦
 2♥         3♣                     2♥        3♦
When Responder has:  when responder has:
 ♠7 ♥Jx ♦K9xx ♣Q98xxx   ♠J982 ♥x ♦QJ9876 ♣A9

Opener Responder       Opener Responder
 2♣         2♥                      2♣        2♥
 2♠         pass                   3♣        3♠
When Responder has:  When Responder has:
 ♠87 ♥Jxx ♦J9x ♣8xxx      ♠Q98764 ♥Jx ♦98x ♣xx

Opener Responder       Opener Responder
 2♣         2♥                      2♣        2♥
 3♦         pass                   3♥        pass
when responder has:   When Responder has: 
♠J982 ♥xxx ♦76 ♣J9xx   ♠J97x ♥xx ♦9xx ♣8xxx

Opener Responder      Opener Responder
 2♣         2♥                     2♣        2♦
 2♠         3♣                     3♦        3NT
When Responder has:  when responder has:
 ♠7 ♥Jxx ♦8xx ♣Q98xx     ♠Q982 ♥Kx ♦76 ♣A9763

Opener Responder       Opener Responder
  2♣         2♦                     2♣        2♥
  3♦         4NT                   3♣        5♣
When Responder has:  When Responder has: 
♠K7 ♥Kxx ♦Qx ♣AJxxx     ♠J9872 ♥x ♦xx ♣J8765

Opener Responder       Opener Responder
  2♣        2♦                     2♣        2♦
  3♦        3♠                     2♥        2NT
when responder has:   When Responder has: 
♠J9872 ♥x ♦76 ♣A9xxx   ♠Q97x ♥x ♦KJxx ♣Q98x

 

Opener Responder
  2♣        2♦
  2♠        2NT
When Responder has:
 ♠7 ♥KJxx ♦QJ9x ♣98xx

 

Rule#3: When the strong 2♣ Opener hand is 64XX with a 6 cards minor and 4 cards major, Opener bids first his 6 cards minor in level 3 and after he bids his 4 cards major at level 4 and Responder with 3 cards in the major and 2 cards in the minor must choose the minor.
Example:
.....Opener = ♠Axx ♥AKJ9 ♦AKQxxx ♣-
Responder = ♠Q107x ♥xxx ♦xx ♣A109x
Opener Responder
   2♣        2♦
   3♦       3NT  <= no 5 cards major
   4♥        5♦ < prefer 8 cards fit
  pass   <= Opener knows Responder has only 2♦.  
 
Rule#4: After 2♣ opening the positive response in a suit are 2♠, 2NT (means ♥ suit), 3♣ and 3♦. A major suit can be bid positive with 5+ cards and a minor suit needs 6+ cards (or very good 5-cards), and all need 2 top honors (AK/AQ/KQ), this is fundamental.
Opener Responder
 2♣        3♣ => ♠xx ♥xx ♦xx ♣AKQJx;
 2♣        2♠ => ♠AKQ10 ♥xx ♦10xx ♣J9xx
 2♣        3♦ => ♠xx ♥x ♦KQ987xxx ♣xx
 2♣       2NT => ♠xx ♥AQ10732 ♦K87 ♣xx

Rule#5: After 2♣ opening the waiting response bid in 2♦ is a undefined hand that promises 5+ hcp or K or A but denies many types of hands like positive 2 top honors in a suit, weak 6/7 cards ahead  by A or K and the maximum negative hand. So, Opener with that information add to others information bring by the bidding where we postulate that a Responder's second bid in suit only having 5+ cards allow Opener had a good picture of Responder's hand to take decision for final contract.

Rule#6: After interference in 2♣, at any level by opponents then:
1- Double by Responder shows a negative hand: no Ace no King;
2- Responder bidding any suit shows a positive hand with 2 tops honors;
3- Responder passing means a waiting bidding;
4- Responder cuebid in opponent suit shows singleton positive 4441 or 5431
5- Responder bidding 2NT or 3NT means a balanced positive hand 8-10 hcp with stopper.
Opener  Opponent  Responder
   2♣         2♠      double => ♠xx ♥xxx ♦xxx ♣Q9xx;
   2♣         4♥      double => ♠xxx ♥xx ♦Kxx ♣J9xx;
   2♣         3♥        pass  =>  ♠Kxxx ♥x ♦Kxx ♣J9xx;
   2♣         3♥        pass  =>  ♠Axxx ♥x ♦Kxx ♣QJ9xx;
   2♣         3♥         4♦     => ♠Qxx ♥x ♦KQ108xx ♣J9x;
   2♣         3♥         4♥     => ♠Kxxx ♥x ♦Kxxx ♣QJ9x;
   2♣         3♥        3NT    => ♠Jxx ♥K1084 ♦Kx ♣QJ9x;
   2♣         2♠        2NT    => ♠AQx ♥xx ♦Jxxx ♣Q9xx;
  
Sequences after second bid of Opener in 2♥:
Opener Responder
  2♣        2♦
  2♥         ?
Responder bids:
2♠ - 5♠+ cards and denies support in Opener suit;
2NT - balanced hand and denies 3♥ cards;
3♣ - 5♣+ cards and denies support in Opener's suit;
3♦ - 5♦+ cards and denies support in Opener's suit;
3♥ - 3♥+ cards and is more strong than a 4♥ bid;
3♠/4♣/4♦ are splinters showing singleton or void in the suit bided and support of 4 cards in Opener's suit;
3NT - singleton in Opener suit and stoppers in all others suit 7-10 hcp;
4♥ - weak and with 4♥ cards (denies singleton or void)
4NT- strong hand asking for keycard RKB0314 in ♥ .

Sequences after second bid of Opener in 2♠:
Opener  Responder
  2♣        2♦
  2♠         ?
Responder bids:
2NT - balanced hand and denies 3 cards in Opener's suit;
3♣ - 5♣+ cards but not 2 top honors;
3♦ - 5♦+ cards but no 2 top honors;
3♥ - 5♥+ cards but not 2 top honors;
3NT - singleton in Opener suit and stoppers in all others suit 7-10 hcp;
4♣/4♦/4♥ are splinters and shows support of 4♠ cards;
4♠ - weak and 4♠ cards (denies singleton or void);
4NT- strong hand asking for keycards RKB1430 for ♠.

Sequences after second bid of Opener in 3♣:
Opener Responder
  2♣        2♦
  3♣         ?
Responder bids:
3♦ - 5♦+ cards and denies 3♣ cards;
3♥ - 5♥+ cards and may have 3♣ cards;
3♠ - 5♠+ cards and may have 3♣ cards;
3NT - balanced hand and denies 3♣ cards;
4♣ - 3♣+ cards in Opener suit;
4♦/4♥/4♠ are splinter and support of 4♣ cards;
4NT- strong hand asking for keycards RKB1430 for ♣.
5♣ - 4♣+ cards in Opener suit – denies Aces - weak;

Sequence after second bid of Opener in 3♦:
Opener Responder
  2♣        2♦
  3♦         ?
Responder bids:
3♥ - 5♥+ cards and may have 3♦ cards;
3♠ - 5♠+ cards and may have 3♦cards;
3NT - balanced hand and denies 3♦ cards;
4♣ - 5♣+ cards and denies 3♦ cards;
4♦ – 3♦+ cards good hand;
4♥/4♠/5♣ are splinter and support of 4♦ cards;
4NT- strong hand asking for keycards RKB1430 for ♦.
5♦ – 4♦+ cards weak hand -denies Aces;
 

TEST YOUR STRONG OPENING BID:

1) ♠KQ2 ♥AK63 ♦AQ76 ♣K7 => 2NT

2) ♠AKQJ32 ♥AK98 ♦AK4 ♣- => 2♣
After Responder's 2♥ Opener's second bid is 4♠
After Responder's 2♦ Opener's second bid is 2♠
...............................   Opener's third bid is 3♥

3) ♠A ♥A98 ♦AKQJ63 ♣A54 => 2♣
After Responder 2♥ Opener's second bid is 3NT
After Responder 2♦ Opener's second bid is 3♦
 Then: If Responder bids 3♠ Opener should bid 3NT
 If Responder bids 3♥ (5-cards) Opener should not bid 5♥ Josephine asking to bid 6♥ with 2 top honors because we know Responder don’t have 2 top honors after bid 2♦ and not 2♥.

4) ♠AKJ3 ♥Q ♦Q9753 ♣AKQ => 1♦  
strong hand 21 hcp but not for 2♣ or 2NT
If Responder bid 1♥ then reverse in 2♠ 
If Responder bids 1♠ you bid 3♥ splinter
waiting for 4♦ to try slam.

5) ♠AKJ3 ♥Q ♦Q975 ♣AKQJ => 1♣ 
strong hand 22 hcp but not for 2♣
If Responder bids 1♥ then reverse in 2♠
If Responder bids 1♠ then splinter in 3♥

6) ♠AK986 ♥AK542 ♦A75 ♣-  => 1♠ 
because if opponent bid 4♣ you have 4♥
After Responder 1NT then jump GF to 3♥
After Responder 2♣ you can bid only 2♥
waiting for a possible 3♣ or 3♦ to rebid 4♥

7) ♠A6 ♥- ♦AK9875 ♣KQJ97  => 1♦                                              
because if opponent bid 4♥ you have 5♣
After 1♥/1♠ then 5-5 / 6-5 jump GF to 3♣ 

8) ♠AK1084 ♥A2 ♦KJ5 ♣AK4   => 2♣
After 2♦ bid 2NT to show balanced 22-23 hcp
After 2♥ bid 2♠ sign-off in principle

9) ♠A6 ♥- ♦AK987  ♣KQJ975 => 1♣
if opponent bid 4♥ you bid 4NT = 5♦/6♣
After 1♥/1♠ then bid reverse 2♦
and after other bid you show your 6/5 with 3♦

10) ♠AK84 ♥A2 ♦AKQ53 ♣K4   => 2♣
After 2♦/2♥ bid 2NT

11) ♠AK ♥AK84 ♦AKQ53 ♣54   => 2♣
After 2♦/2♥ bid 3♦
and if Responder bid 3NT then pass

12) ♠AK ♥5 ♦AKQ3 ♣AK10842   => 2♣
After 2♦/2♥ bid 3♣
and if Responder bid 3NT bid 4♦

13) ♠AK84 ♥AK ♦54 ♣AK753   => 1♣
After a red suit reverse in 2♠
After 1♠ bid 4♠
After 1NT bid 3NT

14) ♠AK ♥AK84 ♦Q4 ♣AKQ53   => 2♣
After 2♦/2♥ bid 3NT

15) ♠AK ♥A4 ♦AK84 ♣AKQ53   => 2♣
After 2♦ bid 3♥ (=26-27 hcp)
After 2♥ bid 3NT

16) ♠A2 ♥AK54 ♦AKQ853 ♣3   => 2♣
After 2♦/2♥ bid 3♦
and if Responder bids 3NT bid 4♥

17) ♠AQ ♥4 ♦KQJ102 ♣AKQJ3  => 2♣
if interference is 4♥ bid 4NT showing both minors
If Responder bids 2♥ (denying A or K) 4NT show minors
After 2♦ second bid is 3♦ and third bid is 4♣
18) ♠AK10 ♥AK ♦63 ♣AKJ1065 => 2♣ 
After response 2♦/2♥ opener bid 3♣

19) ♠AQ ♥AK54 ♦6   ♣AKJ1065 => 2♣
After response 2♦/2♥ Opener bids 3♣
In third Opener bids 4♥

20) ♠AQ ♥AQ865 ♦AK8764 ♣- => 1♦
Second bid 2♥ and third bid 3♥

21) ♠A3 ♥2 ♦AKJ1063 ♣AK76   => 1♦
After response in a major bid 3♦
and third bid 4♣

22) ♠AK75 ♥AK4 ♦AQJ ♣KJ4  => 2♣
After 2♦/2♥ second bid 3ST

23) ♠AK75 ♥AK4 ♦AQJ ♣AK3  => 2♣
After 2♦ second bid 4NT (= 28-29 hcp)
After 2♥ second bid 3NT

24) ♠AKQx ♥AK4 ♦Ax ♣AK4   => 2♣
After 2♦ second bid 3♥ (=26-27 hcp)
After 2♥ second bid 3NT

25) ♠AKQ7654 ♥K6 ♦7 ♣AKQJ   => 2♣
After 2♦ bid 2♠ and third bid 4♣
After 2♥ bid 4♠

26) ♠KQJ106 ♥K6 ♦7 ♣AKQ985 => 1♣    
second bid 2♠ and third bid 3♠

Examples for 3 strong suits:
27) Opener: ♠AKQx ♥AJ94 ♦x ♣AKJ4
Responder: ♠87 ♥K104 ♦A86 ♣Q10952 
Opener Responder
  2♣        2♦  <= waiting and GF
  4♣ <= 3 suits and singleton Diamonds
  ………  4♦ <= ask for controls
 4NT <= step3 = 8 controls so missing a King
               that is with Responder!
  ………  5♦ <= ask for Queens
  5♥ <= zero or 1 Queen
  ………   7♣
   pass
Analyses by Responder: Opener hand may have 30 hcp – we do not count hcp in the singleton suit – we know that Opener has 3 Aces and 2 Kings that means 18 hcp and remain possible 3 J and 2 Q because we have one Q. He answers that he has zero or one Q, Opener minimum hand is 22 hcp if he has only 3 Jacks then he has 21 hcp and so can’t have zero Q. Conclusion Opener has at least one Q. The possible Queen are Q♥ and Q♠, because the Q♣ it is with Responder. So, the third Hearts loser may discarded in the Q♠ and if his Queen is the Q♥ then more easy to make 13 tricks.
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 28) Opener: ♠AKQx ♥4 ♦AJ54x ♣AKJ4
Responder: ♠87 ♥J1098742 ♦86 ♣52
Opener Responder
  2♣        2♥ <= maximum negative
  4♦ <= 3 suits and singleton Hearts
  ……….  4♥ <= to play can’t be asking for controls
  pass   
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 29) Opener: ♠KQJx ♥AKQ4 ♦AKJ5 ♣4
Responder: ♠87 ♥98742 ♦864 ♣532
Opener Responder
  2♣        2♥ <= maximum negative
  3♠ <= 3 suits and singleton Clubs
  ……….  4♥ <= to play 
  pass   
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