Puppet

There are four sequences that lead to 2NT, that then automatically invoke Puppet continuations.. These are:

1. 2NT opening bid showing a balanced 21-22
2. 2♦ opening and 2NT rebid showing a balanced 19-20
3. 2♣ opening and a 2NT rebid following a negative 2♦ response shows 23+ invitational
4. 2♣ opening and a 3NT rebid following  a negative 2♦ response shows 25+-usually to  play  
5. 2♣-2H|S|N   These are control showing responses - See 2♣ opening. These do not lead to Puppet sequences.
   
6. 2NT jump response to a T-O Double - Puppet is useful in this case
   

All Puppet responses to 2NT are transfers except 3♣ which is a stayman like inquiry for both 5 & 4  card majors.
Primary objective is that the 2NT bidder always plays the final contract. To achieve this responder always makes transfers:

3♣ Inquiry:  preferable requirement is 3+ cards in each major. However 2 cards to a top honour is acceptable. Responses are:

3♦!         No 5 card major but holding at least one 4 card major (possibly both). [Note some variants use 4♣ to show both majors this is both unnecessary and potentially dangerous as it takes bidding beyond 3NT.]

3♥|♠      Natural. Shows the 5 card major bid

3NT       No  Major  so  NT bidder is  3-3 or 3-2 in the majors

After a 3♦ reply 3♣ bidder now bids as follows:

3♥!             Shows  a 4  card 'Spade' suit
3♠!              Shows  a 4 card 'Heart' suit
3NT            No 4 card major
4♣!             BOTH Majors

Now for the transfers, there are no jumps or other deviations! Remember every response is a transfer! Aim is to sort out the final denomination whether 3N, Major or minor! The schema is as follows:

• 3♦         Transfer to Hearts   Shows a 5+ card Heart suit. 2NT bidder rebids 3♥

• 3♥         Transfer to Spades  Shows a 5+ card Spade suit. 2NT bidder rebids 3♠
• 3♠          Transfer to 3NT. 2NT bidder must rebid 3NT. Maybe partner has Diamonds on his mind then:
  
• 4♣          A re-transfer to 4♦
• 3NT        A Transfer to 4♣  NOT to play!
  
• 4♣           Transfer  to 4♥ To play
  
• 4♦           Transfer to 4♠ To play
  
• 4NT         Quantitative (shows combined 30 HCP)
  

You may come across additional bids (extensions), however the Author finds them unnecessary.
Continuations may proceed to game OR directly 4NT ERKCB OR cue-bidding. Following any cue-bids TURBO 4NT always
operates NOT ERKCB.