Positive 1M
The positive responses 1♣ - 1♥♠ show 7+ points and 4+ cards. They are as natural as in a natural bidding system. We also use conventions from 2/1, a ubiquitous 5-card major system.
Odwrotka 1♣ - 1M - 2♦ is a fit reverse showing a game-forcing 3+ card support. The jump reverse of the other major shows a game-forcing minor two suiter to alleviate the burden on 2NT.
| 1♣ - 1♥ - | |
|---|---|
| 1♠ | F, 4+♠ |
| 1NT | BAL 12–14, 2–3♠, 2–3♥ |
| 2♣ | UNBAL, 11–17, 5+♣, 0–3♠, 0–3♥ |
| 2♦! | FG, 3+♥ |
| 2♥ | MIN, 11–14, 4=♥ |
| 2♠! | FG, 5+♦, 5+♣ |
| 2NT | FG, 2–3♠, 1–2♥, 3–5♦, 3–5♣ |
| 3♣ | FG, 6+♣ |
| 3♦ | FG, 6+♦ |
| 3♥ | INV, 15–17, 4+♥ |
| 3♠! | SPL, 0–1♠, 4+♥ |
| 3NT | SOL 7+♣, partial stops in ♠ and ♦ |
| 4♣! | SPL, 0–1♣, 4+♥ |
| 4♦! | SPL, 0–1♦, 4+♥ |
| 1♣ - 1♠ - | |
|---|---|
| 1NT | BAL 12–14, 2–3♠, 2–3♥ |
| 2♣ | UNBAL, 11–17, 5+♣, 0–3♠, 0–3♥ |
| 2♦! | FG, 3+♠ |
| 2♥ | FG, 5+♥ |
| 2♠! | MIN, 11–14, 4=♠ |
| 2NT | FG, 0–2♠, 2–4♥, 2–5♦, 2–5♣ |
| 3♣ | FG, 6+♣ |
| 3♦ | FG, 6+♦ |
| 3♥! | FG, 5+♦, 5+♣ |
| 3♠ | INV, 15–17, 4+♠ |
| 3NT | SOL 7+♣, partial stops in ♥ and ♦ |
| 4♣! | SPL, 0–1♣, 4+♠ |
| 4♦! | SPL, 0–1♦, 4+♠ |
| 4♥! | SPL, 0–1♥, 4+♠ |