Non-forcing 1NT
Responder bids 1♠ with any 4+♠, and the transfer raise takes the 3-card limit raise out of 1NT. Thus, 1NT denies most major fits. Opener passes 1NT with any balanced minimum, just as over 1♠ - 1NT. A balanced medium still has to bid 2♣ on a doubleton, and 2♦ can be 4531.
| 1♥ - 1NT - | |
|---|---|
| 2♣ | (11–16, 4+♣) or BAL 13–14 |
| 2♦ | (11–16, 4+♦) or (13–14, 4531) |
| 2♥ | 11–14, 6+♥ |
| 2♠ | 15–16, 4+♠ |
| 2NT! | 15–16, 6=♥, ≤ ♥AJ9 |
| 3♣♦ | 15–16, 5+# |
| 3♥ | 15–16, ((6+♥, AJT+) or 7+♥) |
| 3♠ | 15–16, 4+♠, 6+♥ |
| 3NT! | Gambling, 7+♥ AKQ, no outside A/K |
Just like 1♠ - 1NT, the threshold of suit quality is based on Binky Points.
Impossible spades
Spades that responder rebids must be artificial because 1NT already denies spades. Over 2♣ the impossible 2♠ is the traditional invitational club raise: opener signs off in 2NT or 3♣ or bids game.
| 1♥ - 1NT - 2♣ - | |
|---|---|
| 2♦ | NF, 5+♦ |
| 2♥ | NF, 2–3♥ |
| 2♠! | INV, 4+♣ |
| 2NT | NAT INV |
| 3♣ | NF, 5+♣ |
| 3♦ | INV, 6+♦ |
Over 2♦♥ there are two or more invitations to carry, so 2♠ becomes a puppet to 2NT. The following 3-bid is then the invitational version of the same call, while the direct 3-bid is to play.
| 1♥ - 1NT - 2♦ - | |
|---|---|
| 2♥ | NF, 1–3♥ |
| 2♠! | ART INV, PUP |
| 2NT | NAT INV |
| 3♣ | NF, 6+♣ |
| 3♦ | NF, 4+♦ |
| 1♥ - 1NT - 2♦ - 2♠! - 2NT - | |
|---|---|
| 3♣ | INV, 6+♣ |
| 3♦ | INV, 4+♦ |
Over 2♥ opener has shown 6+♥, so the direct minor bids are signoffs out of the misfit. The puppet carries the limit raise and invitations in either minor. The direct 3♥ is the weaker raise with 3 trumps.
| 1♥ - 1NT - 2♥ - | |
|---|---|
| 2♠! | ART INV, PUP |
| 2NT | NAT INV |
| 3♣♦ | S/O, 6+# |
| 3♥ | NF, 3+♥ |
| 1♥ - 1NT - 2♥ - 2♠! - 2NT - | |
|---|---|
| 3♣♦ | INV, 6+# |
| 3♥ | INV, 2+♥ |