Contested 1♦
These tables come from Strawberry Polish Club with the constructive 6+ free bids. Over other interference, bid as in standard 2/1.
Over (1♥)
| 1♦ (1♥) | |
|---|---|
| X! | TRF, 6+, 4+♠ |
| 1♠! | TRF to 1NT, 8+, 0–3♠ |
| 1NT | NAT, 8–10 |
| 2♣ | F, 10+, 5+♣ |
| 2♦ | NF, 5–9, 4+♦ |
| 2♥! | TRF, 6+♠ |
| 2♠! | INV+, 10+, 4+♦ |
| 2NT | NAT INV, 10–11 |
| 3♣ | PRE, 7+♣ |
| 3♦ | PRE, 0–6, 4+♦ |
| 3♥! | TRF, (PRE, 7+♠) or (FG, 6+♠) |
Over (1♠)
| 1♦ (1♠) | |
|---|---|
| X! | NEG, 6+, 4–5♥ or BAL FG |
| 1NT | NAT, 8–10 |
| 2♣ | F, 10+, 5+♣ |
| 2♦! | TRF, 10+, 5+♥ |
| 2♥ | NF, 5–9, usually 6+♥ |
| 2♠! | CONST+, 8+, 4+♦ |
| 2NT | NAT INV, 10–11 |
| 3♣♥ | PRE, 7+# |
| 3♦ | PRE, 0–7, 4+♦ |