Competing at the 1-level
Notrump becomes cuebid after a double. We still need fit-showing jumps, so Truscott 2NT fits well.
| 1♥ (X) | |
|---|---|
| XX | NF BAL G/T, 10+ |
| 1♠ | Usually 5+♠ |
| 1NT! | TRF, 5+♣ |
| 2♣! | TRF, 5+♦ |
| 2♦! | TRF, 8+, 3+♥ |
| 2♥ | PRE, 0–7, 3+♥ |
| 2♠! | LIM+, 3=♥, 6+♠♦♣ |
| 2NT! | LIM+, 4+♥ |
| 3♣♦! | CONST+, 5+#, 4+♥ |
| 3♥ | COMP, 7–9, 4+♥ |
Bo-Yin Yang found that 1♥ (1♠) is highly similar to 1♥ (X) and introduced the following bidding structure to BTU in 1999.
| 1♥ (1♠) | |
|---|---|
| X | T/O, maybe BAL |
| 1NT! | TRF, 5+♣ |
| 2♣! | TRF, 5+♦ |
| 2♦! | TRF, 9–11, 3+♥ |
| 2♥ | PRE, 4–8, 3+♥ |
| 2♠! | FG, 3=♥ |
| 2NT! | LIM+, 4+♥ |
| 3♣♦! | CONST+, 5+#, 4+♥ |
| 3♥ | COMP, 7–9, 4+♥ |
| 3♠! | S/T, 3+♥ w/o ♠ CTRL |
| 3NT! | COG, 3+♥ w/ ♠ A/K |
| 4♣! | FRAG, 3+♥, 0–1♠ |
| 4♦! | STR PRE, 4+♥ |
| 4♥ | PRE, UNBAL 4+♥ |