Bid shows a specific distribution that can't be opened 1♣ or 1♦
These distributions are 4=4=1=4, 4=4=0=5, 4-3=1=5
11-15 HCP
2♥ - Request Sign-off in ♥
- If hearts for opener has only 3 hearts then they will bid 2♠, pinning the distribution as 4=3=1=5
- Responder can correct again or pass including 3♥ if they have a lot
- This avoids a 3-3 fit
2♠ - Sign-off in ♠
2NT - Need More Information
- 3♣ - shows 3=4=1=5, could be min/max partner will raise 3lvl bid with max
- 3♦ - shows 4=3=1=5, could be min/max partner will raise 3lvl bid with max
- 3♥ - min values 4-4
- 3♠ - max values 4-4
3NT - 15 points with 4-4-0-5 distribution
- 4♣/4♦ RKC can be used after opener provides shape
ALERT
3♣ - Sign-off in ♣
3♦ - Invitational with long, good diamond suit (12-13 HCP)
3♥/♠ - mixed raise 5+ trumps 7-9 HCP
3NT - Sign off with good diamond stoppers and transportation