Technical Flaws of 5-Card Major Systems – Part 4

Ron Sutton • July 13, 2026

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July 13, 2026

Improving Modern Majors

After three years of real-world testing with Modern American Majors, roughly 75% of 1-Major openings were entirely straightforward and perfectly handled by the system. We saw excellent, immediate results at the lower end of the matrix by consistently stopping in 1NT rather than getting stranded in a mismatched 5-2 major suit fit. At the high end, our results matched 2/1, but we excelled on the 11–12 HCP hands because we could consistently stop at the 2-level where 2/1 players frequently climbed too high.

However, occasionally we would hold an 11–12 HCP hand with a 5- or 6-card heart suit, or a 13+ HCP hand with five clubs, and we found ourselves settling for average results. An 11–12 HCP hand with 6 hearts was forced to bid 2♣, often steering the contract into 2NT or 3NT when 4♥ was the safer, higher-scoring spot. Standard American won those specific battles, except when burdened by ambiguous 10 HCP hands.

To excel across all hand types, we introduced a couple of advanced tools: Two-Ranges 2♥ and Extensile 2♣.

Assigning the 2♥ Bid “Two-Ranges”

So far we have argued against two-range bids because our core philosophy relies on extracting the most accurate data on the very first bid. However, the 2♥ response over 1♠ has always been a special case; it represents the other major. Here we use two-ranges to our advantage but it takes us two bids. 2♥ is now a dual-range bid showing an invitational-or-better (11+ HCP) hand with 5+ hearts. This approach creates an elegant hybrid of Standard American and 2/1. The bidding method provides opener detailed information on where to play the contract:

Range 1 (Invitational): 11–12 HCP and 5–6 hearts.
Range 2 (Game Force): 13+ HCP and 6+ hearts.

It may or may not have 3-card spade support. Because it defines the heart suit while leaving spade length up in the air, it is forcing for one round and cannot be passed.

ALERT: Shows 5+ hearts, 11+ points, forcing for one round.

We discovered that when responder holds game-forcing values and 6 or more hearts, initiating the auction with 2♥ is vastly superior to using the artificial 2♦ bid.

With Two Ranges 2♥, the subsequent rebids clearly pinpoint both length and strength:

Showing Range 1: 1♠ – 2♥ – [Opener Rebid] – 3♥ directly communicates: “I have 11–12 HCP and a 6-card heart suit.”
Showing Range 2: 1♠ – 2♥ – [Opener Rebid] – 3NT directly communicates: “I have 13+ HCP, a game force, and 6+ hearts.” This preserves space for opener to pass with a flat minimum or correct to 4♥ with a fit, while keeping slam exploration alive.

How do you bid a game-forcing hand with exactly 5 hearts? You route it through the artificial 2♦ bid.

Improving the Extensile 2♣ Bid

We refer to this response as Extensile 2♣—meaning it is capable of being extended or reaching across multiple hand types to streamline our bidding structure. Having cleaned up our low-range bidding by making 1NT strictly non-forcing (6–9 HCP), we can expand our artificial 2♣ bid to handle a broader array of intermediate and strong responses. Instead of over-burdening 1NT, we use 2♣ as a multi-meaning, stretchable tool.

We assign the 2♣ response to four specific hand archetypes:

The Limit Raise Hand: 11–12 points with support for opener’s major.
The Invitational Balanced Hand: 11–12 HCP without support.
The Distributional Escape Hand: A weaker hand (8–10 HCP) with a long 6-card minor suit that wants to avoid playing in no-trump. This hand will have no support for the opening bid.
The Strong Minor Hand: A game-forcing hand (13+ HCP) featuring a quality 5+ card club suit, lacking 3-card support for the major. (Routing this specific hand through 2♣ preserves much more space than using the artificial 2♦ game force). We love to show 5-card suits.

Following the 2♦ relay, responder’s rebids clarify their specific archetype: raising opener shows the Limit Raise, 2NT shows the Balanced Invitational, etc.

ALERT: Artificial, forcing for one round. Typically shows 11+ points, or a weak hand with a 6-card minor.

The Opener’s Relay Response

When responder bids Extensile 2♣, it requests that the opener rebid 2♦ as a standard relay. This allows the responder to precisely define their hand type on the next round. It is not a forced system command; the opener can bypass the 2♦ relay to show more information about the majors or specific hand shapes or points.

We sacrifice very little by re-purposing 2♣. Consider how many standard conventions already overwrite the natural meaning of 2 clubs—Stayman, Drury, New Minor Forcing, and Checkback Stayman all utilize this exact slot.

What do we gain using Extensile 2♣?

Auctions can safely stop in 1NT when a misfit is discovered.
A narrow, highly disciplined intermediate point range.
The ability to easily show limit-raise hands at a lower level.
Effortless accuracy when looking for a fit in the other major.
It completely replaces Drury, operating seamlessly from any seat.
Opener can position a two-suited hand with total confidence, knowing responder’s exact values.
Significantly cleaner competitive auctions when responder holds a 6-card minor.
It deters opponents from entering or balancing in the auction far better than a standard 1NT response.

What do we give up playing Extensile 2♣?

In 2/1, a 2♣ response over a major is game-forcing and shows a natural club suit. Our Extensile version still includes this exact hand type; it simply takes an extra step to define it. In Standard American, a 2♣ response shows 10+ HCP and a natural club suit, which can theoretically be passed by the opener. We forfeit this incredibly rare 1M – 2♣ – Pass sequence, a loss that real-world duplicate play proves is of no consequence.

Starting with Modern Majors

When introducing Modern American Majors to new partners, we recommend two approaches based on their experience level and preference:

The Fast Track: For established 2/1 players, simply tell them: “Replace your 11–12 HCP forcing 1NT bids with an artificial 2♣ bid, and make 1NT strictly non-forcing. If you play Standard American, adopt 2♦ as your sole game-force command.” It is simple, highly effective, and completely un-intimidating.
The Complete Framework: Introduce Extensile 2♣ and Two Ranges 2♥ right from day one for experienced tournament partnerships looking to maximize their competitive scores.

If you feel the Complete framework is too much to take on at first, simply stick to basic Modern American Majors. You can easily integrate the secondary ranges and specialized rebids later. Even in its basic form, this framework provides a significant structural upgrade over standard 5-card major systems.