Competing at the 1-level
This part shares similarities with the 1♣ opening. There are also differences since 1♦ shows a long suit that allows further preempts.
Like 1♣-(X), natural 1NT is not very useful after a double. Transfer to clubs instead. Unlike 1♣-(X), there is no space for Transfer Walsh here.
| 1♦-(X)- | - |
|---|---|
| XX | NF BAL G/T, 10+ |
| 1M | F, 6+, 4+# |
| 1NT! | TRF, 6+, 5+♣ |
| 2♣! | CONST+, 8+, 3+♦ |
| 2♦ | PRE, 0–7, 3+♦ |
| 2M | PRE, 0–7, 6+# |
| 2NT! | TRF, PRE 7+♣ or FG 6+♣ |
| 3♣! | INV+ TRF, 4+♦ |
| 3♦ | PRE, 0–7, 4+♦ |
| 3M!, 4♣! | SPL, 0–1#, 4+♦ |
When RHO bids a major suit, natural notrump from Polish Club 2005 right-sides the contract. Spades below 3NT are transfer cuebids.
| 1♦-(1M)- | - |
|---|---|
| 1NT | BAL INV, 9–11 |
| 2♣ | INV+, 10+, 5+♣ |
| 2♦ | NF, 6–10, 3+♦ |
| 2♠! | TRF, PRE 7+♣ or FG 6+♣ |
| 2NT | FG with stopper |
| 3♣! | CONST, 7–9, 4+♦ |
| 3♦ | PRE, 4–6, 4+♦ |
| 3♠! | Gambling, SOL 7+♣ without stopper |
| 3NT! | Gambling, SOL 7+♣ with stopper |
| 4oM | To play |
| 4M! | S/T, ask for CTRL |
Transfer Walsh only applies to 1♦-(1♥), the only 1-level red suit.
| 1♦-(1♥)- | - |
|---|---|
| X! | TRF, 6+, 4+♠ |
| 1♠! | TRF to 1NT, 6+ |
| 2♥! | TRF, PRE or INV+, 6+♠ |
| 3♥! | TRF, PRE 7+♠ or FG 6+♠ |
Hearts to 1♦-(1♠) are natural.
| 1♦-(1♠)- | - |
|---|---|
| X! | TRF, 6+, 4+♥ |
| 2♥ | NF, 6–11, 5+♥ |
| 3♥ | FG, 6+♥ |