Niemeijer.
 
wanneer?
 
2♣ - 2♦ - 2NT - ??
2♦ - 2♥♠ - 2NT - ??
 
wat?
 
3♣   = puppet Stayman
  3♦ = 4krt hoog
    3♥ = 4krt ♠
3♠ = 4krt ♥
3SA = to play
4♣  minor suit ask
 
  3♥♠ = 5krt
   
  3NT = geen 4+ krt hoog
    4♣  minor suit ask
    4♦ = echt
4♥♠ = controle (♣)
       
3♦♥ = transfer ♥♠
  3♥♠ = 2 krt.
    4♣   minor suit ask
      4♦ = echt
4♥♠ = controle (♣)
       
  3SA = 5krt andere major
4 nieuwe kleur = controle + missende controle
4♥♠ = fit + alle controles
       
3♠  = transfer ♣
    3NT  afwijzend (geen tophonneur ♣)
4♣ = tophonneur ♣
4♦♥♠ = controle
4NT = Blackwood (♣)
       
3NT  = 5♠ + 4♥, NF
       
4♣  =  transfer ♦
  4♦ = afwijzend
overig = controle, tophonneur ♦
4NT = blackwood (♦)
       
4♦♥ = transfer