Forcing 1NT
Unpassed 1♠-1NT is forcing to accommodate strong invitations, especially 6+♥, which is one step away from 4♥.
| 1♠-1NT | Usually 7–11, 0–3♠ |
|---|---|
| 2♣ | 11–17, 2+♣ |
| 2♦ | 11–17, 4+♦ |
| 2♥ | 11–15, 4+♥ |
| 2♠ | 11–14, 6+♠ |
| 2NT! | 15–17, non-SOL 6=♠ |
| 3♣♦♥ | 15–17, 5+# |
| 3♠ | 15–17, 6+♠, S-SOL or 7+♠ |
| 3NT! | Gambling, 7+♠ AKQ, no outside A/K |
If you wish to invite with 4=♥, you are on the wrong path. You should have opened Ekren 2♣ instead.