Double Club System

Auctions starting 1NT, 2C

This is 5-card Stayman, but responder may have used this bid only as a means to invite game. Responder asks opener to bid a 5-card major, if one is held, otherwise to bid 2. Responder can ask for a 4-card major on the next round, if necessary.

Continuations

2
Denies a 5-card major. Opener may have one or both 4-card majors, and when responder has game values he can continue the enquiry with 3C to find out. When responder has game values and a 5-card major of his own, he can continue by making a transfer bid at the three level. When responder has only invitational values, he must make a natural bid at the two level.
2/
Shows a 5-card major. Denies 4 cards in the other major, since opener should not bid 1NT when 5-4 in the majors.

No other responses are allowed.

Author: Chris Burton
Gravesend Bridge Club