Competing at the 2-level
Major-oriented transfer system competes well with (1NT).
| 1♦-(1NT)- | - |
|---|---|
| X | PEN, nearly BAL INV+ |
| 2♣! | TRF, 3+♦ |
| 2♦! | TRF, 5+♥ |
| 2♥! | TRF, 5+♠ |
| 2♠! | TRF, 5+♣ |
| 2NT! | TRF, PRE 7+♣ or FG 6+♣ |
| 3♣! | TRF, PRE 7+♦ or FG 6+♦ |
| 3♦! | TRF, PRE 7+♥ or FG 6+♥ |
| 3♥! | TRF, PRE 7+♠ or FG 6+♠ |
| 3♠! | Gambling, SOL 7+ suit with no stopper outside |
| 3NT! | Gambling, SOL 7+ suit with one stopper outside |
As clubs are directly under diamonds, bidding after 1♦-(2♣) is pretty natural.
| 1♦-(2♣)- | - |
|---|---|
| X! | T/O, INV+ |
| 2♦ | CONST, 3+♦ |
| 2M | NF, 5+# |
| 2NT | NAT INV |
| 3♣! | INV+, 4+♦ |
| 3♦ | PRE, 4+♦ |
| 3M | FG, usually 6+# |
Competition with 1♦-(2M) models after Rubinsohl. The forcing raise 3♣ and the preemptive raise 3♦ weaponize the diamond fit. The Strawberry adjunct applies here just like 1♣-(2M).
| 1♦-(2M)- | - |
|---|---|
| X! | OPT, INV+ |
| 2♠ | NF, 5+♠ |
| 2NT! | TRF, 5+♣ |
| 3♣! | INV+, 3+♦ |
| 3♦ | PRE, 4+♦ |
| 3♥! | FG, 5=oM |
| 3♥-3♠! | Ask for stopper |
| 3♠! | FG, 6+oM |