The term suit opening is used to describe a one-level natural opening in a suit, i.e. natural 1♣, 1♦, 1♥, 1♠ openings. As there are many different treatments afterwards, here lists some of the common ones.
Responses to Major suit opening Edit
|fit:||8-card fit||single raise 2♥♠||limit raise 3♥♠||game, 1/1, or 2/1|
|9-card fit||2NT or splinter|
|10-card fit||game (preemptive)|
|non-fit:|| new suit|
| Weak jump shift|
|1NT||2/1 (non-jump 2♣, 2♦, or 2♥)|
Responses to Minor suit opening Edit
| new suit|
|jump shift||1/1 (1♦/♥/♠)|
|1NT||2/1 (1♦-2♣, denies majors)|
|4-card support||single raise 3♣♦||limit raise 2♣♦|
There are several different treatments to responding to suit openings.
Common treatments and conventions Edit
Somewhat common treatments and conventions Edit
Other notable treatments and conventions Edit
Fit Responses to 1 of a Major Edit
Partner has promised 13-22 points and a 5-card major.
- With 3+ card support and 6-10 points, bid 2 of the major (constructive raise).
- With 3+ card support and 11-12 points, bid 3 of the major (limit raise).
- With exactly 3 card support and 13+ points, bid game in the major or show a new suit.
- With 4+ card support, 13+ points, and a singleton, bid a double jump shift in the singleton suit. This bid is alertable.
- With 4+ card support, 13+ points, and a balanced hand, bid 2NT. This bid is alertable.
Fit Responses to 1 of a Minor Edit
Partner has promised 13-22 points and at least a 3-card suit. However, opener typically (93% of the time) has at least a 4-card suit, so only 4 cards are required to raise. However, with a 4-card major suit, it is typically better to sow the major instead.
- With 4+ card support and 6-10, points, bid 3 of the minor (inverted jump raise). This bid is alertable.
- With 4+ card support and 11+, points, bid 2 of the minor (inverted single raise). This bid is alertable.
New Suit Responses Edit
New suit responses are identical regardless of the opening suit.
- With 6+ points (unlimited) and a 4-card suit, bid a new suit at 1-level.
- With 11+ points (unlimited) and a 4-card suit, bid a new suit at the 2-level (non-jump!).
- With 2-4 points and a 6-card suit, bid a jump shift. This bid is alertable.
- See other jump shift conventions.
Notrump responses Edit
- With 6-10 points and no eligible raise or new suit to bid, bid 1NT.
- The original meaning of 2NT response was 13-15 HCPs and a balanced hand, and was game forcing. But nowadays, many play it as invitational.
- The original meaning of 3NT response was 16-18 HCPs, but with 2NT assigned to a different meaning, the range played nowadays is commonly much wider, as a sign off.