Natural 1♥
The major suit openings show 11–16 points and 5+ cards. They can be light in late seats. I separate 1♥♠ into two chapters due to subtle differences in their continuations.
As 1♠ is natural, transfers only serve the heart raise.
| 1♥ - | |
|---|---|
| 1♠ | F, 4+♠ |
| 1NT | NAT NF, 0–3♠, 0–3♥ |
| 2♣! | (R), FG, 0–3♥, 0–3♠ |
| 2♦! | TRF, CONST+ 3+♥ |
| 2♥ | PRE, 3+♥ |
| 2♠! | PRE, 6+♠ |
| 2NT! | LIM+, 4+♥ |
| 3♣♦! | INV+, 5+#, 4+♥ |
| 3♥ | PRE, 4+♥ |
| 3♠! | SPL, 0–1♠, 4+♥ |
| 3NT! | COG, 33(43) |
| 4♣♦! | SPL, 0–1#, 4+♥ |
By passed hand
A passed hand cannot force to game, so 2♣ becomes Drury. Other responses are unchanged.
A light opener holds 3+♠ and passes 1♠ or 1NT, so opener’s rebids over them still show 11+ points.
| P - 1♥ - | |
|---|---|
| 2♣! | LIM, 3+♥ |