Jacoby 2NT
Opener response
1♠-2N; ??
3X
Shortness.
3♠
Extra without shortness
3N
Min without shortness
4X
5-5 in two suit (?) range
After interrupted
Interrupted by double
1♥-2♠; (Dbl)
P
Default bid
Rbl
first round control in ♠ suit, Ace or void.
2N
♠ shortness
3♣
♣ shortness
3♦
♦ shortness
3♥
17~21, no shortness