Bridge Convention Cards Explained: What That Sheet of Paper Really Means

Before your first duplicate game, the director may ask for your convention card. You hand over a sheet of paper that summarizes what you and your partner have agreed to bid, notrumps, majors, minors, competitive tools, signals.

If you’ve never seen one before, it looks like a form that someone designed specifically to confuse. Abbreviations everywhere. Boxes within boxes. Lines for things you’ve never heard of.

Here’s what it’s actually for, what the sections mean, and how to fill one out as a beginner.

What a Convention Card Is (And Why It Exists)

Bridge is unusual among card games because the opponents are allowed to know what your bids mean. They can’t see your cards, but they can ask what a bid signifies, and you’re required to tell them accurately.

A convention card is a written record of your agreements. When an opponent asks “what does that bid mean?”, you hand them your card, or your partner reads from it and explains.

This serves two purposes. For your opponents, it’s transparency. They get the same information you and your partner share. For you and your partner, it’s a reference that prevents misunderstandings. Nothing is worse than bidding a convention your partner doesn’t know you play.

The ACBL (American Contract Bridge League) produces the standard convention card used in North American club and tournament play. It’s two-sided, printed on cardstock, available for free at most clubs and online at acbl.org.

See our complete list of bridge conventions for more on this and other popular conventions.

The Major Sections

General Approach

At the top of the card, you indicate the overall system you play: Standard American, 2/1 Game Forcing, Precision, Acol, or something else. Most North American players default to Standard American Yellow Card (SAYC), it’s what beginners are usually taught first and what most clubs expect you to play unless you announce otherwise.

Notrump Opening Bids

This is the most-read section of the card. Opponents want to know whether your 1NT is 15-17 (standard), 12-14 (weak), 14-16, or something else. They also want to know what Stayman means in your system, whether you play Jacoby Transfers, and what 2♠ or 2NT shows as responses.

A standard entry here:

1NT: 15-17
2♣: Stayman
2♦/2♥: Jacoby transfers (2♦ shows hearts, 2♥ shows spades)

Major Suit Openings

How many cards does your 1♥ or 1♠ opening promise? Standard American requires five. Some systems (Acol, for example) open four-card majors. Opponents need to know.

Also in this section: what does a raise mean? A direct raise to 2♠ over 1♠ — is that 6-9 points? A limit raise? What about 3♠? Does it show a weak preemptive raise or a limit raise? These distinctions affect how opponents defend.

Minor Suit Openings

1♣ and 1♦ in Standard American don’t necessarily show length. They can be prepared bids on three-card suits when the hand doesn’t fit anything else. The card shows whether 1♣ is natural or may be short, and what 1♦ promises.

Two-Level Openings

What does 2♣ mean? In Standard American, it’s the artificial strong opening — 22+ points or any game-forcing hand. What do 2♦, 2♥, and 2♠ show? If you play weak two-bids (a preemptive hand with a six-card suit and 5-10 points), those go here. If you play Multi-2♦ or some other convention, it gets listed.

Competitive Bidding

This section covers what you do when the opponents interfere. Do you play negative doubles? (Most Standard American players do.) What does a cue bid of the opponent’s suit show, a limit raise equivalent? Do you play Michaels cuebids? Unusual 2NT?

Leads and Signals

On the back of most convention cards is a section for defensive methods. What do you lead from a suit? Top of a sequence? Fourth-best against notrump? What signals do you play, standard attitude (high encourages) or upside-down? Do you show count naturally (high-low from even) or reverse?

Alerts and Announcements

Some bids require you to alert the opponents when your partner makes them. An alert means: “this bid has a non-natural meaning, and opponents may ask.”

The ACBL divides these into Alerts (for most conventions) and Announcements (for certain routine conventions where the meaning is spelled out directly).

Announcements are spoken directly: when partner opens 1NT, you say “15 to 17” without waiting to be asked. When partner bids 2♣ Stayman, you say “Stayman.” When partner transfers with 2♦, you say “transfer.”

Alerts are signaled by a red ALERT card from the bidding box (or by saying “alert” at tables without boxes). The opponents can then ask what the bid means.

You don’t alert your own bids, your partner does. And you don’t explain your own bids; partner explains them. This structure exists because you shouldn’t know more about the meaning of your bid than your opponents do at the moment you made it.

If you play only standard conventions, the alert rules are mostly straightforward. As you add more complicated tools to your system, the alert requirements become more specific. The ACBL publishes detailed guidance on what requires an alert.

Filling Out a Convention Card as a Beginner

For your first card, keep it simple. Here’s a starting point:

General approach: Standard American

Notrump: 1NT = 15-17. Stayman, Jacoby Transfers. That’s it.

Majors: 5-card majors. Simple raises are 6-9. Limit raises are 10-11. Jump to game is to play.

Minors: 1♣ may be short (2+ cards). 1♦ may be short (3+ cards).

Two-level: 2♣ is strong (22+). 2♦, 2♥, 2♠ are weak twos with 6-card suits.

Competitive: Negative doubles through 4♦ (if you’ve agreed to this). Otherwise leave it blank.

Leads and signals: Fourth-best leads against notrump, standard attitude signals.

A card this simple is perfectly fine for beginner and intermediate club play. The director will help if there are questions. Most experienced opponents know that beginners play straightforward systems and are patient about it.

Why It Matters

The convention card matters to your opponents, yes. But it matters more to you.

Sitting down with a card you’ve both filled out forces a conversation. “What do we play after a 1♣ opening if they overcall 1♥?” You might discover you’ve been making different assumptions for months. The card surfaces disagreements before they surface at the table.

At tournament level, the consequences of undisclosed agreements are serious. Playing a convention your partner didn’t know you were playing, and not alerting it, is a procedural violation. Opponents are supposed to have access to your actual agreements.

But even at a casual club game, having the card discussion is worth it. It makes your system crisper. It closes gaps. It reduces the “I thought you knew that” moments.

When to Get a More Complicated Card

Most partnerships add conventions one at a time. You learn Stayman, you add Jacoby Transfers, someone teaches you negative doubles, you add a few competitive tools.

Each addition goes on the card before you start playing it at the table, not after. The standard rule: if you’ve agreed to play something, it’s on the card. If it’s not on the card, you don’t play it.

The reverse is also true. Just because a convention is on the card doesn’t mean you have to use it on any given hand. The card discloses; it doesn’t obligate. But if partner bids something the card says you play, you’d better recognize it.

Common Questions About Convention Cards

Do I need a convention card to play at a club?

Most clubs don’t strictly require one for beginner games. Some require them for any duplicate game. Ask the director when you call ahead. Even if it’s not required, having one is good practice.

What if my partner and I disagree about what a bid means?

This is exactly the conversation the card is there to start. If you can’t agree, default to whatever the standard system says and note it. You can play it differently once you’ve actually discussed it and reached an agreement.

Can I look at the card during the game?

Yes. Both you and your partner can look at your own cards. The opponents can ask to see yours at any time.

What if an opponent asks about a bid and I don’t know what it means?

Say so. “I don’t know” is a legal and acceptable answer. You cannot mislead opponents about your agreements. If you genuinely don’t know what partner’s bid means, say you don’t know. The director can be called if the situation requires a ruling.

What’s on the back of the card?

Mostly defensive methods: leads, signals, discards. Some cards also include sections for slam conventions, competitive bidding details, and other specific agreements. The front covers the main bidding structure; the back covers what happens once a contract is set.

The convention card is one of the stranger features of duplicate bridge for newcomers. It can seem bureaucratic until you understand what’s actually going on: two-way transparency, protecting opponents and partners simultaneously.

Once your bidding system feels consistent, once you and partner reach the same contracts regularly, the card becomes a point of pride rather than a headache. You know what you play, partner knows what you play, and the opponents are fully informed.

Building that consistent system takes work. Brian helps by walking through bidding situations hand by hand, explaining what each bid conveys, and identifying where your auction went off course. The more hands you practice, the more your card fills in naturally.

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