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♣ | 4+♣ or BAL 12–14 |
| 2♦ | 4+♦ |
| 2♥ | 11–15, 4+♥ |
| 2♠ | 11–14, 6+♠ |
| 2NT | 15–16, 5=♠, 2–3♥, 2–4♦, 2–4♣ |
| 3♣♦♥ | 15–16, 5+# |
| 3♠ | 15–17, 6+♠ |
If you wish to invite with 4=♥, you are on the wrong path. You should have opened Ekren 2♣ instead.