Jacoby 2NT (Two No-Trump)
Jacoby 2NT is an artificial, game-forcing response to partner's 1M opening bid (e.g. 1
: 2NT). 2NT shows at least 4-card support with 13+ points, and asks opener to describe his/her hand in an effort to probe for slam.
The Jacoby 2NT convention is meant to be used in a 5-card major bidding system that also uses limit raises to show game-invitational strength with major suit support.
Opener's Rebids
Opener's 3-level rebids are:- 3
: Singleton or void in clubs
- 3
: Singleton or void in diamonds
- 3-Major: A rebid of opener's suit shows 17+ points and interest in slam. Asks responder to describe his hand further.
- 3NT: Good 13-15 points, balanced, no singleton/void
Opener's 4-level rebids are:
- 4: 5+ clubs.
- 4: 5+ diamonds
- 4-Major: A 4-level rebid of opener's suit shows a minimum hand (11-14 points) and is a signoff bid. After 1 : 2NT, a 4
rebid by opener shows 5+ hearts.
Responder's Rebids
- After any 3-level rebid by opener, responder can bid any suit (besides the agreed trump suit) to show a first-round control (i.e. an ace or void).
- After ANY rebid by opener, 4NT is Blackwood (or Roman Key Card Blackwood).
Example
| Opener | Responder | ||||
 AK843 | QJ52 | ||||
 A932 | KQ5 | ||||
 J | A862 | ||||
 T98 | Q53 | ||||
Opener 1 (1)3 (3)4 (5)Pass (7) |
Responder 2NT (2) 4 (4)4 (6) |
- 1 shows 12+ points and 5+ spades
- 2NT shows 12+ points and 4+ spades
- 3 shows a diamond singleton or void
- 4 shows first-round diamond control
- 4 shows first-round heart control
- 4 shows a willingness to stop in game, and implies the club suit as a concern. With a club ace or void, responder would have bid 4 instead of 4.
- Pass shows that opener does not have anything extra to show, and is satisified with game.