Inverted Minor Raises

Partner opens 1♦. You hold:

♠765 ♥K84 ♦AQ952 ♣Q6

You have 10 HCP and five-card diamond support. In standard methods, you’d jump to 3♦ (limit raise). But that uses up bidding space and doesn’t leave room to investigate notrump or slam.

Inverted Minors flips the traditional structure:

• Single raise (1♦-2♦) = Strong (10+ HCP), forcing
• Jump raise (1♦-3♦) = Weak (0-6 HCP), preemptive

The “inversion” gives you room to explore with strong hands while jumping immediately when weak to obstruct the opponents.

What Are Inverted Minors?

After a 1♣ or 1♦ opening by partner, raises work oppositely from standard:

Both raises deny a four-card major (you’d bid the major first with 4).

Why It Exists

Standard minor raises have problems:

With ♠765 ♥K84 ♦AQ952 ♣Q6 after partner opens 1♦:

• Jump to 3♦? Uses space, hard to find 3NT or slam
• Bid 2NT? Wrong shape (you have five diamonds)
• Bid 1♥? Wrong - you don’t have four hearts

Inverted Minors solve this:

Partner: 1♦
You: 2♦ (10+ HCP, 5+ diamonds, forcing)

Now partner can bid naturally, showing stoppers for 3NT or cuebids for slam. You have room to investigate.

Requirements for the Single Raise

To bid 2♣ over 1♣ (or 2♦ over 1♦):

Example strong raise: ♠765 ♥K84 ♦AQ952 ♣Q6 (10 HCP, 5 diamonds, no major)

Requirements for the Jump Raise

To bid 3♣ over 1♣ (or 3♦ over 1♦):

Example weak raise: ♠765 ♥84 ♦J97652 ♣85 (3 HCP, 6 diamonds)

The jump takes away bidding space from opponents, making it harder for them to find their major-suit fit.

Opener’s Rebids After the Strong Raise

After 1♣-2♣ or 1♦-2♦, opener describes their hand:

Rebid 2NT = Balanced Stopper-Showing Hand

Shows balanced hand with appropriate strength for notrump:

• 15-17 HCP if playing weak NT (12-14)
• 12-14 HCP if playing strong NT (15-17)
• All unbid suits stopped

Example:

1♦ - 2♦
2NT = 15-17 balanced, majors stopped

Opener: ♠AJ5 ♥K82 ♦KQJ4 ♣Q103 (16 HCP balanced)

Rebid 2 of a Major = Stopper-Showing

Shows a stopper in that major, asks about the other major. Forcing.

Example:

1♦ - 2♦
2♥ = Heart stopper, asking about spades

Opener: ♠85 ♥KQ5 ♦AKJ84 ♣Q103 (heart stopper, no spade stopper)

Rebid 3♣ (after 1♦-2♦) = Natural

Shows 4+ clubs, unbalanced hand, typically no major stoppers (else would bid NT or show a stopper).

Example:

1♦ - 2♦
3♣ = Natural, 4+ clubs, unbalanced

Opener: ♠85 ♥72 ♦AKJ84 ♣AQ105 (4-4 minors, no major stoppers)

Rebid 3 of the Minor = Minimum

Shows 11-13 HCP, minimum opener, invites responder to bid 3NT or pass.

Example:

1♦ - 2♦
3♦ = Minimum (11-13), typically 5+ diamonds

Opener: ♠K5 ♥Q82 ♦AQJ842 ♣73 (11 HCP, long diamonds)

Jump Rebids = Extra Strength or Shape

• 3♥/3♠ = Natural, 5+ card suit, not forcing
• 3NT = 18-19 HCP, balanced, stoppers
• 4♣/4♦ = Minorwood (asking for key cards in agreed minor)
• 4♥/4♠ = Splinter (singleton/void, slam interest)

Example Hands

Example 1: Finding 3NT

Opener: ♠AJ5 ♥KQ3 ♦KQJ84 ♣103
Responder: ♠K62 ♥84 ♦A10952 ♣AQ6

Opener   Responder
1♦       2♦ (10+ HCP, 5+ diamonds)
2NT      3NT
Pass

Hand validation:

• Opener: 3+3+5+2 = 13 cards ✓ | HCP: 5+5+6+0 = 16 ✓
• Responder: 3+2+5+3 = 13 cards ✓ | HCP: 3+0+5+5 = 13 ✓
• Combined: 29 HCP, nine-card diamond fit

Opener’s 2NT shows 15-17 balanced with stoppers. Responder, with 13 HCP and good controls, bids 3NT. Nine tricks cold with the long diamonds.

Without inverted minors, jumping to 3♦ would make finding 3NT much harder.

Example 2: Stop-Showing to 3NT

Opener: ♠K5 ♥AQ5 ♦AKJ84 ♣Q103
Responder: ♠A82 ♥942 ♦Q10952 ♣A6

Opener   Responder
1♦       2♦
2♥       2♠ (spade stopper)
3NT      Pass

Hand validation:

• Opener: 2+3+5+3 = 13 cards ✓ | HCP: 3+5+7+1 = 16 ✓
• Responder: 3+3+5+2 = 13 cards ✓ | HCP: 4+0+3+4 = 11 ✓
• Combined: 27 HCP, stoppers in all suits

Opener shows heart stopper with 2♥. Responder bids 2♠ (spade stopper). Opener, knowing all suits stopped and 27+ HCP, bids 3NT. Making.

The stop-showing bids below game let both players confirm all suits covered before committing to 3NT.

Example 3: Weak Jump Preempt

Opener: ♠AQ5 ♥KJ3 ♦KQ84 ♣Q103
Responder: ♠82 ♥742 ♦J109752 ♣85

Opener   Responder
1♦       3♦ (weak, 0-6 HCP, 6+ diamonds)
Pass

Hand validation:

• Opener: 3+3+4+3 = 13 cards ✓ | HCP: 5+4+4+1 = 14 ✓
• Responder: 2+3+6+2 = 13 cards ✓ | HCP: 0+0+1+0 = 1 ✓
• Combined: 15 HCP, ten-card fit

Responder’s 3♦ shows weak hand with long diamonds. Opener, balanced minimum, passes. If opponents had a spade or heart fit, the jump to 3♦ made it harder for them to find it.

This is the “inverted” part: the jump is weak, not strong.

Example 4: Slam Try

Opener: ♠A5 ♥K3 ♦AKJ842 ♣AQ5
Responder: ♠K62 ♥A84 ♦Q10953 ♣K6

Opener   Responder
1♦       2♦
2♥       2♠
4NT (Key Card) 5♦ (1 or 4 key cards)
6♦       Pass

Hand validation:

• Opener: 2+2+6+3 = 13 cards ✓ | HCP: 4+3+7+5 = 19 ✓
• Responder: 3+3+5+2 = 13 cards ✓ | HCP: 4+4+3+3 = 14 ✓
• Combined: 33 HCP, excellent controls

Opener shows heart stopper, responder shows spade stopper. Opener, with 19 HCP and six diamonds, uses 4NT (Minorwood) to ask for key cards. Responder shows one (the ♦Q), and opener bids 6♦. Easy slam.

Inverted minors left room below game to exchange information and check controls.

After Interference

If opponents overcall after your 1♣ or 1♦ opening, inverted minors are typically off. Use different methods:

Standard after interference:

• Single raise (1♦-[1♠]-2♦) = Weak, 6-9 HCP, competitive
• Jump raise (1♦-[1♠]-3♦) = Weak preemptive, 0-5 HCP
• Cuebid (1♦-[1♠]-2♠) = Limit raise or better, 10+ HCP
• Double = Negative double (shows the unbid suits)
• 2NT = Jordan 2NT (limit raise, 10-12 HCP)

Partnership agreement needed on whether inverted minors stay on after interference. Most turn them off.

The 7-9 HCP Gap

Notice that:

• Strong raise = 10+ HCP
• Weak raise = 0-6 HCP

What about 7-9 HCP?

Use judgment:

• Upgrade to 2m if you have a good 9 HCP, good suit quality, or aces
• Downgrade to 3m if you have a bad 7 HCP, poor suit, all queens-jacks
• Bid 1NT if balanced without five-card support

Most partnerships accept the gap and make a judgment call.

Advantages

Inverted Minors give you:

1. Room to explore for 3NT without jumping past 2NT
2. Stop-showing sequences to confirm all suits stopped
3. Slam investigation space with strong hands
4. Preemptive value when weak (jumping to 3m obstructs opponents)
5. Immediate signal about hand strength (single raise = strong)

Disadvantages

Potential problems:

1. After weak NT (12-14), 3m can be too high when both hands minimum
2. Opponents get information from your stop-showing bids (helps their defense)
3. Some partnerships forget whether inverted minors are on after interference
4. The 7-9 HCP gap requires judgment

Most players consider the advantages worth the trade-offs.

Common Mistakes

Mistake 1: Raising with a Four-Card Major

Wrong: ♠AJ54 ♥K3 ♦Q10952 ♣86
Partner opens 1♦, you bid 2♦.

Why it’s wrong: Inverted minor raises deny a four-card major. Bid 1♠ first, then support diamonds later.

Mistake 2: Forgetting It’s Forcing

Wrong auction:

1♦   2♦
Pass (opener thinking "partner has 10-12, we're high enough")

Why it’s wrong: The single raise is forcing. Opener must bid. Even with a minimum, bid 3♦ or show a feature.

Mistake 3: Jumping with a Decent Hand

Wrong: ♠76 ♥K84 ♦QJ9652 ♣Q6 (9 HCP)
Partner opens 1♦, you jump to 3♦ thinking it’s invitational.

Why it’s wrong: 3♦ shows 0-6 HCP, very weak. With 9 HCP, bid 2♦ (upgrade) or 1NT (if you’re conservative).

Partnership Agreements to Discuss

1. Through what level? Most play inverted minors only after 1♣ and 1♦ openings, not after 2♣/2♦.
2. On after interference? Most turn them off; some keep them on.
3. What shows stoppers? Agree on whether 2M shows a stopper or asks about a stopper.
4. Criss-cross? Some play 1♣-2♦ or 1♦-3♣ as limit raise in opener’s minor.
5. 4-card or 5-card support? Some allow the strong raise with only four cards in diamonds.

Write your agreements on your convention card.

Who Should Play Inverted Minors?

Good fit for:

• Partnerships playing weak notrump (12-14)
• Players who frequently compete in minor suits
• Pairs comfortable with forcing auctions below game

Not ideal for:

• Beginners (adds complexity)
• Casual partnerships (easy to forget)
• Players uncomfortable with forcing bids

If you play strong notrump (15-17), inverted minors work fine but aren’t as essential (since 1NT handles many balanced 15-17 hands).

Practice This Convention with Brian

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The Bottom Line

Inverted Minors flip traditional minor raises:

Single raise = strong (10+ HCP, 5+ support, forcing)
Jump raise = weak (0-6 HCP, 5+ support, preemptive)

This gives you room to investigate 3NT and slam with strong hands, while jumping immediately to obstruct opponents when weak.

The trade: More bidding space when strong. A 7-9 HCP gap that requires judgment.

When partner opens 1♣ or 1♦ and you have five-card support:

• 10+ HCP → raise to 2 (forcing)
• 0-6 HCP → jump to 3 (preemptive)
• 7-9 HCP → use judgment (upgrade or downgrade)

That’s Inverted Minors.