Negative 1♦
Relay structure from Viking Precision 2007 nest very strong hands into 1♣ - 1♦ - 1♥. This treatment rescues the 2NT opening from the notrump ladder and frees 2NT up for preemptive uses.
| 1♣ - 1♦ - | |
|---|---|
| 1♥! | ART F, 19+ |
| 1♠ | 16–19, UNBAL 4+♠ |
| 1NT | 16–18, BAL |
| 2♣♦♥ | 16–19, UNBAL 5+# |
| 2♠! | 16–19, 4+♥, 6+♦♣ |
| 2NT! | 16–19, 5♥(440) |
| 3♣♦! | 16–19, 5+#, 5+♥ |
| 3♥! | 16–19, 6+♥, 4+♠ |
| 3♠ | 16–19, 7+♠ |
| 1♣ - 1♦ - 2♠ - | |
|---|---|
| 2NT! | Ask for the minor suit |
| 3♣! | P/C |
| 3♦! | INV+, 4+♥ |
Strong 1♥
| 1♣ - 1♦ - 1♥ - | |
|---|---|
| 1♠! | DBL NEG, 0–4 |
| 1NT | BAL FG, 2–4♠, 2–4♥, 2–5♦, 2–5♣ |
| 2♣♦ | UNBAL FG, 5+# |
| 2♥♠ | FG, 5–6# |
| 2NT! | FG, (4441) |
| 3♣! | FG, 5+♦, 5+♣ |
| 3♦! | FG, 5+♠, 5+♥ |
| 3♥♠ | FG, 7+# |
| 1♣ - 1♦ - 1♥ - 1♠ - | |
|---|---|
| 1NT | BAL 19–21 |
| 2♣! | 20–23, 2+♣ |
| 2♦ | 20–23, (5+♦ or 4♦(441)) |
| 2♥♠ | 20–23, 5+# |
| 2NT | NAT FG |
| 1♣ - 1♦ - 1♥ - 1NT - | |
|---|---|
| 2♣! | STAY |