2NT Stenberg (Citronclub)
by Trond Kildal


This version in from the Swedish system Super Lemon Club, later Citronclub, and we have done some adjustment later: 

2NT shows trump support and 10+. An advantage with this is that 1maj-2maj shows 6-9 and an even hand , 1maj-3maj shows 6-9 and not balanced. If you play mini-splinter, 1maj-3maj would deny a single or void . This bid is very pre-emptive, specially after 1S - 3S.

After 1H / 1S - 2 NT:
        - 3 K: Asking for points.. 
                - 3 D: 10-12. 
                        - 3 in the opening suit from the opener is to play.
                        - 3 in the other major asks for a singleton - and 3NT denies that.
                        - 4 in a new suit is cue-bid.
                - 3 H: 13-15. 
                        - Relay asking for singleton - and 3NT denies that.
                        - 4 in a new suit is cue-bid.
                - 3 S: 16-18. 
                        - 3 NT ask for a singleton .
                        - 4 in a new suit is cue-bid.
                - 3 NT: 19+. 
                        - 4 in a new suit asks for a cue-bid.
                - 4 in a new suit: Void and 10-12.
        - 3 in a new suit: Asking for controls. 3 in the opening suit is control asking in club. If the opener has passes 3 in the opening suit is to play., 3C is control asking in club. Further on 3 in a new suit: 
                1 step: no cotrol
                2 steps: second, and so on.
        - 4 in a new suit:: Void, minimum. New suit from the 2NT bidder is cue-bid.
More: 1 H - 2 NT - 4 H shows void in spade.