Forcing 1NT
Unpassed 1♠-1NT is forcing to accommodate strong invitations, especially 6+♥, which is one step away from 4♥.
| 1♠-1NT | Usually 7–11, 0–3♠ |
|---|---|
| 2♣ | 11–17, 2+♣ |
| 2♦ | 11–17, 4+♦ |
| 2♥ | 11–15, 4+♥ |
| 2♠ | 11–14, 6+♠ |
| 2NT! | 15–17, 6=♠, ≤ ♠AJ9 |
| 3♣♦♥ | 15–17, 5+# |
| 3♠ | 15–17, 6+♠, AJT+ or 7+♠ |
| 3NT! | Gambling, 7+♠ AKQ, no outside A/K |
If you wish to invite with 4=♥, you are on the wrong path. You should have opened Ekren 2♣ instead.
The threshold of suit quality is based on Binky Points:
Holding NT Suit KQJxxx 0.20 0.14 AT9xxx 0.13 0.14 KQJ9xx 0.21 0.19 AJxxxx 0.32 0.23 KQJTxx 0.29 0.26 KQJT9x 0.29 0.29 AJ9xxx 0.44 0.29 AJTxxx 0.57 0.40 AJT9xx 0.63 0.45 AQxxxx 0.76 0.52 AQ9xxx 0.86 0.57 AQTxxx 0.99 0.65—
holdings.new.txt, Binky Points computed by Thomas Andrews in 2008
Precision 2NT
The invitational 2NT from Precision shows 6 cards in the bid major. However, I had a hard time finding its continuations. Therefore, I came up with the following responses to find better games, especially 4♥.
| 1♠-1NT 2NT- | 15–17, 6=♠ |
|---|---|
| 3♣! | PUP |
| 3♦! | FG, 6+♦ or 5–6♥ |
| 3♥ | FG, 6+♥ |
| 1♠-1NT 2NT-3♣ | PUP |
|---|---|
| 3♦-P | S/O, 6+♦ |
| 3♦-3♥ | S/O, 6+♥ |
| 3♦-3♠+ | FG, 6+♣ |