Stayman in Doubt.

Applies after the sequence 1NT 2♣ 2 or 1NT 2♣ 2♠.

A bid of 3 agrees the suit or ♠ and asks opener to bid 4/4♠ if his hand contains a worthless doubleton else bid 3NT.                                                                           

1NT 

2♣ 

2 

 3

 

3NT

 

 

 

 no worthless doubleton.

 

1NT 

 

2♣

 

2 

 

3

 

 4

 

 

 

 contains a worthless doubleton.