2♦ = weak with 5+M and 5+ in another suit (may be both Majors).
What do you do?
Responses:
Pass = long ♦ or suspicion that opener has ♦
2♥ = 2+♥ P/C (if you rebid 3♥ next, you show your own suit)
2♠ = 3+♠ P/C (if you rebid 3♠ next, you show your own suit)
2NT = GF relay
3♣ = nat NF
3♦ = INV, either tolerance for both Majors or 3-suited with a short M
3♥ = both Majors or 3-suited short ♠, PRE
3♠ = 3-suited short ♥, PRE
3NT = to play
4♣ = transfer your best M
4♦ = bid your best M
4M = to play
2♦ = weak with 5+M and 5+ in another suit (may be both Majors). What do you do? Responses:
Pass = long ♦ or suspicion that opener has ♦
2♥ = 2+♥ P/C (if you rebid 3♥ next, you show your own suit)
2♠ = 3+♠ P/C (if you rebid 3♠ next, you show your own suit)
2NT = GF relay
3♣ = nat NF
3♦ = INV, either tolerance for both Majors or 3-suited with a short M
3♥ = both Majors or 3-suited short ♠, PRE
3♠ = 3-suited short ♥, PRE
3NT = to play
4♣ = transfer your best M
4♦ = bid your best M
4M = to play