The opps' double modifies the bids of the responder.
The responder can freely pass with a weak hand and a 2-level suit shift is weak It shows less than 10HCP.
- Support bids show a fit and less than 10HCP
- Redouble and 2NT Truscott enable you to bid handss with more than 10HCP
- 1NT is a natural bid, with 6-10HCP
- A suit change is round forcing at level 1 et non forcing at level 2
Responder's support bids after a 1 level opening major bid
- simple support with a 3 card fit and 5-7HCP
- A jump with a 4 card fit and more than 7HCP
With more than 10HCP, make the bidding sequence forcing :
With a fit
- of 3 cards in the opening major : XX
- of 4 cards in a major opening (and 5 for a minor) : 2NT Truscott
- of 44 cards in a major opening and a nice 5 carder : Jump fit in that suit ('Meet me' jump fit)
Without a fit
- Suit change at level1, round forcing
- With a balanced hand and stoppers in all other suits 3 NT
- Without any other possible bid : lRedouble
With less than 11HCP and no fit
- Suit shift at the 2 level ; faibles et non forcing. In general they show a nice 6 carder
- 1NT with no biddable major and no fit : This weak bid ne does not guarrantee stoppers in the suits called for by the opps' double.
Reminder : A suit shift at the 1 level does not deny 11+HCP and is round forcing