Reading the Opponents' Signals: What Their Carding Tells You

Every time a defender plays a card, that card carries information. Sometimes intentionally (a signal to partner), sometimes unintentionally (declarer can draw inferences from the choice). As declarer, you have access to the same information the defenders are sharing with each other. You just have to pay attention.

Most intermediate players focus on their own play as declarer and ignore the defenders’ cards except to note who follows suit and who doesn’t. That’s like reading a book and skipping every other chapter. The defenders’ carding tells a story, and reading it can transform your results.

The Three Main Signal Types

Defenders communicate through three primary signals. Most partnerships in ACBL-land play standard signals, though some play upside-down (which reverses the meanings). Always check the opponents’ convention card.

Attitude (Like or Dislike)

When partner leads a suit, the first discard or follow-up card shows attitude. A high card says “I like this suit, continue.” A low card says “I don’t like this suit, try something else.”

As declarer, this tells you whether the defense wants to continue the suit they led. If West leads the heart king and East plays the 2, East doesn’t want hearts continued. That might mean East has no more hearts, or East has the king and doesn’t want to set up your queen, or East thinks there’s a better suit to attack.

You don’t know the exact reason, but you know the message. Factor it into your plan.

Count (How Many)

When declarer leads a suit, defenders give count. A high-low sequence (playing the 7 then the 3) shows an even number of cards. A low-high sequence (3 then 7) shows an odd number.

This is gold for declarer. If you lead the ace of a suit and West plays the 7, then you lead the king and West plays the 3, West started with an even number (high-low = even). If dummy has four cards and you have three, that’s seven. West had an even number, so either two or four. If four, East had two. If two, East had four.

Combine that with other information (the bidding, the play so far) and you can often pinpoint the exact distribution.

Suit Preference

When the signal can’t logically be attitude or count, it’s suit preference. A high card suggests the higher-ranking of the two remaining suits. A low card suggests the lower-ranking.

Suit preference signals typically appear in ruff situations. If West leads a suit for East to ruff, West’s choice of card (high or low) tells East which suit to return after ruffing.

As declarer, suit preference signals reveal where the defenders’ entries and values are. If West leads a conspicuously high card for East to ruff, West is announcing entries in the higher-ranking side suit.

Watching the Small Cards

The most overlooked skill in reading signals is tracking the exact spot cards. When West follows to a suit with the 8, then later plays the 3, that’s a high-low. It shows something. But if you weren’t watching, you just see “two small cards from West” and learn nothing.

Train yourself to watch which card each defender plays on each trick. Not just whether they follow, but which card they choose. A good defender doesn’t play cards randomly. Every card carries meaning.

This is easier said than done at the table. The pace of play, the need to plan your own cards, and the mental load of counting all compete for your attention. Start by tracking one defender’s cards in one key suit. As that becomes habitual, expand to tracking both defenders in multiple suits.

When Signals Lie

Good defenders sometimes false-card to mislead declarer. If declarer is known to watch signals, a savvy defender might give a false count signal or play an encouraging card in a suit they don’t actually want continued.

How do you handle false signals? Context. A defender who false-cards the opening lead return is taking a risk that their partner misreads the signal too. Most defenders don’t false-card when it might confuse partner more than declarer. In competitive play, expect false cards from strong opponents and take signals from weak opponents at face value.

Also consider whether the signal makes sense given the rest of the hand. If East plays a count signal showing four hearts, but you can see 11 hearts between your hand, dummy, and West’s lead, East can’t have four. The signal is either wrong or you miscounted. Double-check.

Using Signals in Practice

Hand 1: You’re in 3NT. West leads the ♠6. You play low from dummy, East plays the ♠Q, you win the ♠A.

You lead a diamond to dummy. West follows with the ♦2. East follows with the ♦8.

East’s ♦8 is likely a count signal (high card suggests an even number of diamonds). If East has two diamonds, you know the diamond distribution and can plan accordingly.

West’s ♦2 is also count: low card from an odd number. If West has five diamonds, you’d better not duck a diamond or West will run the suit.

Hand 2: You’re in 4 Hearts. West leads the ♣K. East plays the ♣9.

East’s ♣9 is attitude: a high card, encouraging clubs. This tells you East likes clubs. Maybe East has the ♣Q or ♣J and wants West to continue. Or maybe East wants a club ruff.

Either way, you know the club suit is dangerous for you. Plan your trump timing to cut off communication between the defenders in clubs.

The Ethical Note

Reading the opponents’ legitimate signals is fair game. That’s information conveyed through the cards themselves, which is part of the game.

What’s not fair game is reading the tempo or manner of the signal. If East hesitates for three seconds before playing the encouraging ♣9, you shouldn’t draw conclusions from the hesitation. Only the card itself is authorized information.

At the club level, this ethical line sometimes blurs. At tournaments, directors enforce it. Focus on the cards, not the cadence of play.

Building the Skill

Reading signals is a habit, not a talent. It develops through repetition.

After every session, pick two or three hands where you had a guess. Look at the hand record. Check what the defenders played. Could you have read their signals to find the right line?

Over weeks and months of doing this, you’ll start reading signals in real time. The defenders are telling you their hand. Listen.