| Bid | Description | Related Conventions |
|---|---|---|
1 |
2+ clubs, 12-21 points | Limit Raises |
1 |
4+ diamonds, 12-21 points | Limit Raises |
1 |
5+ hearts, 12-21 points | Limit Raises | Jacoby 2NT | Jordan 2NT |
1 |
5+ spades, 12-21 points | Limit Raises | Jacoby 2NT | Jordan 2NT |
| 1NT | Balanced, 15-17 HCP, no single tone | Gerber | Jacoby Transfers | Stayman |
2 |
22+ HCP or 8+ tricks | — |
2 / / |
6-card suit, 6-9 HCP, with honors | RONF |
| 2NT | Balanced, 18-20 HCP | Gerber | Jacoby Transfers | Stayman |
3![]() |
6-card suit, 6-9 HCP | — |
3 / / |
? | — |
| 3NT | Balanced, 25-27 HCP | Jacoby Transfers | Stayman |
4 / |
8-card suit, 5-11 HCP | — |
4 / |
7+ card suit, 7 tricks not vulnerable or 8 tricks vulnerable | — |
Limit Raises are used after partner opens the bidding with 1-of-a-suit. A jump raise (e.g.
->3
->3
)
Back in the old, old days, this sequence showed a strong game-forcing hand. Over time, players gradually realized that this approach was too uncommon and impractical. Hence the birth of the limit raise.
There is expert debate about 3-card limit raises opposite a
/


In his 1970 book "Win at Bridge with Jacoby Modern", Oswald Jacoby listed a couple caveats for bidding 2NT:
Jacoby 2NT is intended for 5-card major systems that employ limit raises for game invitations. Thus, it fills the need for a game-forcing raise with unlimited strength. The convention doesn't come up often, but is precious in its role.
In ACBL games, Jacoby 2NT is alertable.