TLDR
Bergen Raises are a structured response to partner’s major-suit opening using 3♣ and 3♦ to show four-card support. 3♣ shows a constructive raise (7-9 dummy points), 3♦ shows a limit raise (10-12), and 3 of the major shows a preemptive raise (0-6). The system clarifies length and strength in one bid.
In this post, you’ll find the full structure, opener’s rebids, the Law of Total Tricks logic, common mistakes, and a practice hand.
Partner opens 1♠ and you hold ♠ K 8 6 3 ♥ Q 7 4 ♦ 10 5 2 ♣ K 9 2. Seven high-card points, four-card spade support, a very ordinary hand. In a standard system, you would raise to 2♠. But the 2♠ raise covers a wide range (6-10 HCP, three or four trumps), and partner cannot tell whether you have a three-card-support minimum or a four-card-support maximum. With a ninth trump, the partnership might belong in 3♠ or even 4♠. With only eight, 2♠ is enough.
Bergen Raises, invented by Marty Bergen, solve this by devoting specific bids to four-card support across three different strength ranges. They compress the information into a single call so partner knows length and strength immediately. Combined with the Law of Total Tricks, they let the partnership bid to the right level without exchange of precise counts.
Why the convention exists
The Law of Total Tricks says a partnership can safely compete to the level of their total trumps. Eight trumps mean the two-level, nine trumps the three-level, ten trumps the four-level. The problem is that the standard major-suit raise structure hides trump length. A 2♠ raise could be three or four cards. A 3♠ raise is a limit raise but again does not specify length.
Bergen Raises pull the four-card support hands out into 3♣ (constructive), 3♦ (limit), and 3 of the major (preemptive). A direct 2♠ is now reserved for three-card support, making the length unambiguous. The jump to game (4♠) is preemptive with five-card support. The partnership always knows exactly how many trumps they hold.
The basic structure
After 1♠ (or 1♥), responder’s bids break down as follows:
| Responder’s bid | Trump length | Strength | Meaning |
|---|---|---|---|
| 2 of major | 3 | 6-10 HCP | Constructive raise, 3-card support |
| 3♣ | 4+ | 7-9 HCP | Constructive raise with 4-card support |
| 3♦ | 4+ | 10-12 HCP | Limit raise with 4-card support |
| 3 of major | 4 | 0-6 HCP | Preemptive raise |
| 4 of major | 5+ | 0-9 HCP | Preemptive, “advance save” |
| 2NT (Jacoby) | 4+ | 13+ HCP | Game-forcing major raise (separate convention) |
The structure leaves 2♠ (or 2♥) as a three-card-support-only bid. If you have four-card support, one of the Bergen bids is always correct. If you have three-card support, the simple raise is the only choice.
Opener’s rebid after 3♣
After partner’s 3♣ constructive raise, opener can bid:
| Opener’s rebid | Meaning |
|---|---|
| 3 of the major | Minimum opening, no game interest |
| 3♦ | Game try, asking for more |
| 3 of other major | Game try, asking for help in this suit |
| 3NT | Choice of games: 3NT or 4 of the major |
| 4 of the major | Game, no slam interest |
The 3♦ game-try asks responder to bid game with an accepting hand. With the minimum 7 HCP, responder signs off. With 8-9 HCP and good shape, responder bids game. The structure lets a 13-point opener explore game opposite a 7-9 responder without committing.
Opener’s rebid after 3♦
After partner’s 3♦ limit raise, opener can bid:
| Opener’s rebid | Meaning |
|---|---|
| 3 of the major | Minimum opening, reject the invite |
| 4 of the major | Accept the invite, play in game |
| New suit at 3-level | Slam try, cue-bid showing control |
| 4NT | Blackwood or RKC, agreeing trumps |
Limit raises invite game, so opener’s decision is just accept or reject. With extra values or shape, opener accepts. With a bare minimum, opener passes 3 of the major.
The preemptive raise
A direct 3♠ (or 3♥) over partner’s 1 of the major is preemptive, showing four-card support and 0-6 HCP. The purpose is to shut the opponents out of the auction when partner may not have a full opener and you have a good trump holding. Do not bid 3 of the major with 7-9 HCP, that is 3♣ territory.
The 4 of the major jump is an “advance save” preempt with five-card support. It commits the partnership to game, knowing that even a sacrifice may be cheaper than letting the opponents find their spot.
Bergen Raises with interference
When the opponents overcall or double partner’s 1 of the major, Bergen Raises are typically off. The structure relies on 3♣ and 3♦ being free bids, and interference complicates the meaning of both. Partnerships usually play that:
- Over a double, Bergen Raises are off. Use 2 of the major (mixed raise), 3 of the major (preemptive), redouble (values), or Jordan 2NT (limit raise with four-card support).
- Over an overcall, Bergen Raises are off. Use cue-bid of overcaller’s suit as limit raise, jump cue as game-forcing raise, and 2 or 3 of the major as natural preemptive.
This is one of the annoying but necessary parts of the convention. Bergen-raise partnerships need a parallel set of competitive-raise agreements because the base structure does not extend to contested auctions.
Common mistakes
1. Using the 2 of major raise with four-card support
The entire point of Bergen Raises is that 2 of the major shows three-card support. If you raise to 2♠ with four spades, partner will underbid at the three-level when the partnership has nine trumps. Drill the rule: four-card support always goes through a Bergen bid, never the simple raise.
2. Mixing Bergen Raises with Jacoby 2NT
Most Bergen-raise partnerships also play Jacoby 2NT for four-card support with game values (13+ HCP). This leaves 3♣ for 7-9 and 3♦ for 10-12, with 2NT for 13+. If you play Jacoby 2NT, remember that 3♦ is limit raise territory, not game-forcing.
3. Forgetting Bergen is off in competition
Partner opens 1♠, the opponent overcalls 2♥, and you bid 3♦ thinking it is Bergen. It is not. Over a two-level overcall, 3♦ is a free bid showing diamond length and values, not a limit raise. The limit raise over interference goes through the cue-bid of 3♥.
4. Preempting at the wrong vulnerability
A preemptive 3 of the major can be risky when vulnerable opposite non-vulnerable opponents, because the downside of going set two or three times doubled is greater than the upside of shutting them out. Check your vulnerability before making a preemptive four-card raise to the three-level.
5. Assuming opener always has four-card support
Most partnerships open 1♠ with a five-card suit. If opener has only five spades and responder has four, the partnership has nine trumps. But if opener has five and responder three (standard 2♠ raise), the fit is only eight. Partnerships playing Bergen have more confidence in the trump count because the length is always disclosed.
A practice hand walked through
Partner deals and opens 1♠. You hold:
You hold:
♠ K 9 8 4
♥ A 7 3
♦ Q 6 5
♣ J 9 2
Auction so far: Partner (Opp) You
1♠ Pass ?
Ten high-card points, four-card spade support. This is a classic limit raise with four trumps. In the Bergen structure, the right bid is 3♦. It tells partner exactly: 10-12 HCP, four-card support, inviting game.
Partner now decides:
- With a bare 12-13 HCP minimum: bid 3♠ (reject). You pass.
- With 14-16 HCP: bid 4♠ (accept). Game is cold.
- With 17+ or shape: explore slam with cue-bids or 4NT.
Without Bergen, you would bid 3♠ (direct limit raise) and leave partner guessing about length. With Bergen, partner knows the partnership has nine trumps and can apply the Law of Total Tricks to the decision.
Putting this on your card
Bergen Raises are a package deal. You need Jacoby 2NT for the game-forcing major raise, and you need a defined set of competitive-raise agreements for interference. Make sure all three are on your convention card before introducing Bergen. Half-implemented, the structure fails.
Once you have the three systems lined up, practise with weak-notrump and strong-notrump opening ranges separately. The information that flows is substantial, and partnerships that use Bergen for a year find their matchpoint scores in contested major-suit auctions noticeably higher.
Frequently asked questions
What are Bergen Raises?
Bergen Raises are a set of responses to a one-of-a-major opening that use jumps to 3♣ and 3♦ to show four-card support in specific strength ranges. 3♣ shows 7-9 HCP constructive, 3♦ shows 10-12 HCP limit raise. The structure distinguishes three- and four-card support clearly and lets the partnership find the right level faster.
Why do I show four-card support separately?
Because trump length determines the safe level of the auction. The Law of Total Tricks says a partnership can compete to the level of their total trumps. With nine trumps (opener’s five, responder’s four), the three-level is safe. With eight, only the two-level. Bergen Raises disclose trump length so partner can apply the Law correctly.
Is 3 of the major preemptive in Bergen?
Yes. In Bergen Raises, a direct 3 of the major is a preemptive raise showing four-card support and 0-6 HCP. The purpose is to shut out the opponents while partner may be minimum. This is different from standard systems where 3 of the major would be a limit raise.
Does Bergen apply over a minor-suit opening?
No. Bergen Raises are a major-suit response structure. Minor-suit openings have different raise structures (Inverted Minors or Standard). Bergen only kicks in after 1♠ or 1♥.
What if partner overcalls my Bergen raise?
If opponents pass your Bergen raise and the auction continues normally, opener’s rebids keep their Bergen meaning. If opponents overcall over Bergen, the auction becomes competitive and partnership agreements take over. Most pairs treat opener’s rebid of 3 of the major after Bergen interference as still the minimum signal.
Should I play Bergen Raises or Standard?
Bergen Raises are most useful when you and your partner already play Jacoby 2NT for the strong four-card support raise. If you play a simpler system, Bergen adds complexity without clear benefit. For a new partnership, groove Jacoby 2NT first, then consider adding Bergen as an upgrade.