Solving Together Without Competing

It is possible to spend an hour with someone over a jigsaw puzzle and say almost nothing.

A hand reaches for a dark blue piece. Another hand turns one with a suspiciously straight edge. Someone murmurs, “That’s probably sky.” Ten minutes later the same piece is discovered to be water. Nobody is offended.

This is a peculiar kind of togetherness. There is a task, but no boss. There is progress, but no need to keep score. Conversation can appear and disappear without either person having to rescue it. If one of you goes to make tea, the other can keep looking for the missing corner of a red roof.

Puzzles are often described as solitary things: one mind against one problem. Yet some of their most durable settings are social. A crossword lies between two breakfast plates. A riddle is asked aloud. A family leaves a jigsaw on a table for three days and people drift in and out of it. Two friends stare at the same logic problem until one says, “Wait. What if that word doesn’t mean what we think it means?”

The pleasure is not quite competition and not quite teamwork in the usual office sense.

The puzzle gives the room a third thing to pay attention to.

A conversation that does not have to face you

Ordinary conversation can be demanding in a surprisingly literal way. You look at the other person. They look at you. Silences become visible. A pause can feel as though it needs filling simply because there is nowhere else for attention to go.

Put a puzzle on the table and the geometry changes.

Now both people can look at the same object. A clue, a cluster of pieces or an unfinished grid can carry some of the attention that would otherwise sit entirely on the conversation. You are still together, but you are not required to perform togetherness every second.

Psychologists who study collaboration often use the idea of common ground: the information that people know, and know that they know together. Herbert Clark and Susan Brennan argued that coordinated activity depends on building and updating this shared understanding as people act.

A puzzle makes common ground unusually tangible.

“This blue bit” is not an abstract topic. It is right there.

“The clue we thought was about a bird” has a square waiting for it.

“That piece you tried before” can be picked up and tried again.

A 2024 systematic review of dialogue studies involving matching tasks describes how conversational partners gradually adapt what they say to information they share. References can become shorter and more efficient because both people have built a history around the same objects.

Anyone who has solved with the same person for a while will recognise the less academic version.

At first: “The piece with a little white line and some green in the upper-left corner.”

Twenty minutes later: “The weird green one.”

No glossary was signed. The phrase simply became enough.

The puzzle remembers for both of you

Many cooperative activities require somebody to keep the plan in their head. Puzzles often put the plan outside the head.

A jigsaw does this beautifully. Every correct piece changes the shared object. Completed patches become landmarks. Rejected pieces return to the loose population. The edge announces itself as a boundary. Nobody needs to give a status update because the status is on the table.

A crossword has a similar quality. One person may know the obscure river; the other sees that the crossing letter makes it impossible. The grid is a public memory of what the pair currently believes.

This matters because collaboration is not merely two people thinking at the same time. They have to coordinate what they notice, what they know and what they are trying next. Research on joint action treats that coordination as its own problem: people predict one another, share information and adjust their actions around a common goal.

A physical puzzle is a remarkably low-tech coordination device.

You can point instead of explain.

You can place a piece provisionally instead of making a speech.

You can erase a letter.

You can leave a cluster unfinished and let somebody else recognise it later.

The object carries some of the burden.

This may be one reason shared puzzles can feel companionable without becoming intense. The activity offers enough structure to hold two people together, but usually not so much structure that every move has to be negotiated.

The table is keeping minutes. Nobody else has to.

Expertise can be useful without becoming rank

Competitive games are very good at discovering who is better at a particular thing.

Cooperative puzzles can do something more interesting with unequal skill: they can turn it into division of attention rather than hierarchy.

One solver may be excellent at anagrams and hopeless at general knowledge. Another may notice visual symmetry instantly but miss wordplay. A child may see the bright yellow piece an adult has scanned past six times. Someone who has never done a cryptic crossword may take a clue’s surface meaning so literally that they accidentally expose the misdirection.

In a shared puzzle, different forms of competence can overlap.

That does not make the interaction automatically generous. A fast solver can still dominate a crossword, filling every answer before anyone else has time to think. A jigsaw can acquire a small dictator who insists on sorting all pieces by colour according to a private system known only to the regime.

But the puzzle itself does not require that outcome.

When the goal is shared, a strong solver can hold back without throwing the game. They can offer a partial observation instead of the answer: “I think this clue is doing something with the word turn.” They can move a promising piece nearer without placing it. They can ask what the other person sees.

That is very close to the art of a good hint. The aim is not to prove that you know; it is to leave enough of the discovery intact for somebody else to make it.

The distinction matters because the Aha moment is oddly delicate. If I tell you the answer, I can transfer the information. I cannot transfer the exact pleasure of seeing it yourself.

Solving together works best when knowledge moves without flattening that moment.

Shared attention is work, but gentle work

Cooperation can sound like an effortless social virtue. In practice it involves constant tiny negotiations.

What are we looking at?

Did you notice what I noticed?

Are we still trying the same idea?

Do you understand what I mean by “that bit”?

Researchers studying children’s cooperative play have found that successful coordination depends heavily on getting and maintaining one another’s attention. In one set of experiments, making bids for attention easier increased the amount of cooperative play. Studies of remote collaborative problem solving similarly show that shared attention is not one simple state; people move through different levels of monitoring, mutual awareness and genuinely shared focus.

A puzzle supplies many natural attention bids.

“Look at this.”

“Does this fit?”

“Read number seven.”

“What if these two go together?”

They are small sentences, but they do important social work. They invite another person into the same patch of the problem.

The invitation is also easy to decline. “No, I’m still on this corner” is not a rejection of the person. It is merely a different square.

That separation between social attention and personal evaluation is easy to underestimate. A puzzle gives you something to disagree about that is not each other.

The piece either fits or it does not.

The crossing letter either works or it does not.

The constraint can absorb the argument.

For a little while, the problem gets to be the difficult one in the room.

The best shared puzzles allow parallel thinking

Some puzzles are naturally more companionable than others.

A jigsaw has enormous parallelism. Four people can work on four regions without taking turns. One sorts edges, one assembles lettering, one hunts for faces, one quietly does something mysterious with all the pieces everyone else had given up on.

Crosswords can also split well. Clues are independent enough for two solvers to roam, while crossing letters constantly reunite their work.

Riddles are different. Their classic shape is asymmetric: one person knows and one person guesses. That is part of their social energy. As the oldest written riddles remind us, the preserved text is only half the event. Someone had to ask; somebody else had to be puzzled.

Other formats resist shared solving because every action belongs to one player at a time. A small phone screen can turn cooperation into shoulder-surfing. A timer can make a thoughtful partner feel slow. Individual scores can quietly transform “Did we get it?” into “Who contributed more?”

None of those features is inherently bad. Competition can be joyful, and turn-taking can be elegant. But they produce a different social object.

If the aim is easy cooperation, a few qualities help: a state everyone can see, enough room for multiple people to notice different things, cheap ways to try and undo, and no need to identify which person deserves each fragment of progress.

Those are also marks of fair puzzle design. The information is available. The rules stay put. Failed ideas can teach rather than punish.

The difference is that fairness now has a social dimension. The puzzle must make room not only for thinking, but for two people to think at different speeds.

A shared solution is not the sum of two private ones

There is a tempting way to describe collaborative solving: Person A contributes half the answer, Person B contributes the other half, therefore together they are twice as effective.

Real solving is messier and much more interesting.

One person’s wrong idea can make the other notice the right feature. A half-formed sentence can give someone else the missing association. An apparently useless cluster of jigsaw pieces can become meaningful when a second person rotates it. The contribution is not always a piece of information. Sometimes it is a change in what the other person is able to see.

Research on common ground gets at this. People in dialogue do not merely exchange finished packets of knowledge; they adapt references, gestures and explanations around what has already happened between them. Meaning is partly built in the interaction.

This is why the sentence “We solved it” can be accurate even when neither person could say who solved which part.

The ownership has blurred.

There is a lovely social version of the Aha moment in this. Someone begins: “Oh—”

The other person sees it before the sentence finishes.

Both hands move toward the same square.

Then comes the short, ridiculous pleasure of two people being right at once.

No scoreboard improves it.

Silence is allowed to count

The most attractive thing about a shared puzzle may be what it does not demand.

It does not require a deep conversation.

It does not require constant eye contact.

It does not require everyone to be equally witty, informed or energetic that evening.

You can talk about work for twenty minutes, then stop. You can complain about the picture having far too much blue. You can sit quietly while the rain does whatever rain does against the window. The puzzle keeps the encounter from feeling abandoned.

This should not be inflated into a medical claim. A jigsaw is not therapy because two people enjoy doing one together, and there is no need to sell ordinary companionship as a cognitive intervention.

Its value can remain ordinary.

There are not many activities in which silence, conversation, concentration and mild incompetence can coexist so comfortably.

A good shared puzzle creates a small temporary world with a clear problem and unusually loose social rules. Participate intensely or drift. Find three pieces or fifty. Leave for tea. Come back. The work waits without keeping score.

That courtesy resembles something we value in solitary play too: a good puzzle should let you leave.

Perhaps it should let another person join without making them audition first.

The finished crossword will not record who supplied 17 Across. The jigsaw picture does not preserve the border between your pieces and mine.

By the end, all the evidence of individual ownership has disappeared into the solution.

That may be the nicest thing about solving together.

For a while, nobody has to be the most interesting thing in the room. The puzzle can do that job.

Sources and further reading

• Herbert H. Clark and Susan E. Brennan, “Grounding in Communication”, in Perspectives on Socially Shared Cognition (1991), on common ground and the coordination required for collective action.
• Vincent Bovet, Dominique Knutsen and Marion Fossard, “Direct and indirect linguistic measures of common ground in dialogue studies involving a matching task: A systematic review”, Psychonomic Bulletin & Review (2024).
• Nicola Yuill et al., “How getting noticed helps getting on: successful attention capture doubles children’s cooperative play”, Frontiers in Psychology (2014), on attention bids, joint attention and cooperative play.
• Gudrun Knoblich et al. and colleagues, “Joint Action: Mental Representations, Shared Information and General Mechanisms for Coordinating with Others”, Frontiers in Psychology (2017), a review of mechanisms involved in coordinating shared action.
• Hanna Järvelä et al., “Joint attention behaviour in remote collaborative problem solving”, Research and Practice in Technology Enhanced Learning (2021), on different levels of joint attention during dyadic problem solving.
• Jigsaw puzzle photograph, Björn Larsson (Scouten) via Wikimedia Commons, licensed under CC BY-SA 3.0.