Natural 1♥
The major suit openings show 11–17 points and 5+ cards. I separate them into two chapters due to subtle differences in their continuations.
Responses to 1♥ are similar to natural 2/1 along with mixed fit-showing jumps. The 2♠ response shows a 3-card limit raise and a 6-card side suit.
| 1♥- | 11–17, 5+♥ |
|---|---|
| 1♠ | F, 4+♠ |
| 1NT | NF, usually 7–11, 0–3♠, 0–3♥ |
| 2♣♦ | NAT FG |
| 2♥ | CONST, 3+♥ |
| 2♠! | LIM, 3=♥, 6+♠♦♣ |
| 2NT! | FG, 4+♥ |
| 3♣♦! | CONST+, 5+#, 4+♥ |
| 3♥ | LIM, 4+♥ |
| 3♠! | SPL, 0–1♠, 4+♥ |
| 3NT! | COG, 12–15, 33(43) |
| 4♣♦! | SPL, 0–1#, 4+♥ |
| 4♥! | PRE, UNBAL 4+♥ |
1♥-2♠
The heavy-tailed limit raise promises 3-card support and a 6-card side suit. This agreement is especially useful for spades. Choice between 4♥♠ arises from 63(xx) but not 54(xx).
| 1♥-2♠ | LIM, 3=♥, 6+X |
|---|---|
| 2NT! | Invite 6+♠ |
| 3♣ | Invite 6+♣ |
| 3♦ | Invite 6+♦ |
| 3♥ | S/O |
P-1♥
P-1♥ reduces to a fairly natural system. We can keep using Stenberg 2NT because it assigns minimum hands to 3♣.
| P-1♥- | 11–17, 5+♥ |
|---|---|
| 2♣♦ | INV, 5+# |
| 2NT! | INV, 4+♥ |
| 3♥! | CONST, 4+♥ |