Diamonds 1♠
Responses follow Moscito 2007 §2.1.4. Point ranges are copied from its 9–14 openings. Pass-or-correct bids cater for opener’s possible clubs.
| 1♠ - | |
|---|---|
| 1NT! | 11+ |
| 2♣! | 5+♠, 4+♥ |
| 2♦! | TRF, 5+♥ |
| 2♥! | TRF, 5+♠ |
| 2♠! | TRF, 5+♣ |
| 2NT! | LIM, ♦ support |
| 3♣! | P/C |
| 3♦ | 6–9, 3–4♦ |
| 3♥♠! | SPL |
| 4♣! | SPL |
Over 1NT opener bids 2♣♦♥♠ naturally, and responder’s next step is a relay. Over 2♣ responder’s 2NT is a good 3-card heart raise. Over 2♠ opener’s 2NT shows short clubs. Over 2NT opener’s new suit shows shortage.
| 1♠ - 2♦! - | |
|---|---|
| 2♥ | 0–2♥ |
| 2NT! | good raise, 3+♥ |
| 3♥ | WK raise, 3+♥ |
| 1♠ - 2♦! - 2♥ - | |
|---|---|
| 2♠ | 5+♥, 4=♠ |
| 2NT! | G/T |
| 3♣! | P/C |
| 1♠ - 2♦! - 2♥ - 2NT! - | |
|---|---|
| 3♣♦ | MIN, # |
| 3♥♠ | MAX, ♣/♦ |
Over 2♥ opener rebids the same way with spades as the suit.