Catena is a word game about finding meaningful connections between seemingly distant ideas.
A game starts with two words. Your task is to connect them with a chain of nouns, using only two kinds of links: context and analogy.
A good Catena is not simply valid. It is short, clear, specific, and elegant. Every word should earn its place.
For example:
mirror → crack → branch → tree → forest
The chain works because each step is strong, and one of the links uses analogy: the branching pattern of a crack resembles a branch.
That combination of association, analogy, compression, and judgment is what makes Catena interesting.
Where Catena came from
I began using the game around 1989, long before there was any software for it.
The name Catena comes from the Latin word for chain and was inspired by Descartes’ idea of the catena mundi — “the chain of the world” connecting all things and all sciences.
The image felt appropriate. In Catena, one idea leads to another, not arbitrarily, but through a sequence of meaningful relations.
Over the years, I kept refining the rules, testing different forms of play, running contests, and using Catena in creative-thinking and personal-development work.
By the early 2010s, the game already had a fairly developed ruleset: context links, analogy links, limits on analytical shortcuts, bonuses for wordplay, and harder variants such as analogy-only play.
What was missing was a practical way to judge the quality of chains consistently.
That changed with AI.
Why AI matters
Catena has always been easy to explain and difficult to judge well.
A human player can often feel immediately that one chain is better than another, but turning that intuition into a consistent scoring system is harder.
The difficulty is that Catena is not just about whether two words can somehow be connected.
A good judge has to distinguish between:
- a strong link and a merely defensible one,
- a valid context and an accidental co-occurrence,
- an analogy and an analytical explanation,
- a useful bridge and a generic semantic shortcut,
- a clever use of polysemy and an arbitrary play on words.
AI makes it possible to evaluate these distinctions quickly enough for normal play.
That does not make the game “an AI game.” The creative work remains with the player. AI acts mainly as judge, opponent, explainer, and training partner.
What makes Catena different
Many word-chain games rely on spelling, letter changes, rhyme, or fixed lexical rules.
Catena works differently.
The game is built around meaning.
Two words may be linked because they belong to the same characteristic situation:
station → train
or because they share a structural, functional, or symbolic similarity:
snail → galaxy
The challenge is to move between ideas without falling back on easy shortcuts.
For example, analytical links such as:
tree → plant → organism
are logically correct, but they make the game trivial.
Likewise, very generic bridges such as:
bathroom → water → river
can connect too many things too easily.
Catena is designed to reward more specific and interesting paths.
More than a game
Catena can be played competitively, but that is only one use.
Over the years, I have used it for:
- creative thinking,
- idea generation,
- language learning,
- training associative flexibility,
- developing analogical thinking,
- group exercises,
- contests,
- and self-development.
One method that grew out of the game was Catena Mapping: using chains of associations and analogies to move deliberately outside the obvious conceptual field of a problem and generate new directions for creative work.
The same basic mechanism can support very different forms of play.
Different ways to play
The standard game uses:
7 chains
with a maximum of:
7 words per chain
and allows:
context + analogy links
But Catena can use different rulesets.
A short-chain mode emphasizes compression.
An analogy-only mode becomes much harder and shifts the game toward structural and metaphorical thinking.
A contest may reward speed, elegance, or total score across several chains.
A creative-work mode may remove the competitive element entirely and use Catena simply as a tool for exploring ideas.
The rules stay the same. The purpose can change.
Why the rules are strict
The restrictions in Catena are not arbitrary.
They exist to stop the game from collapsing into easy universal shortcuts.
If categories, causal explanations, generic abstractions, or weak bridges were freely allowed, almost any two words could be connected mechanically.
That would make chains longer, easier, and less interesting.
The rules force the player to look for connections that are more direct, vivid, and surprising.
In that sense, Catena is a game of creative constraint.
The limitations are what make the possibilities interesting.
The idea
Catena is simple enough to learn in a few minutes, but difficult enough to keep revealing new levels of play.
At its core, the game asks one question:
What is the strongest next connection?
Sometimes the answer is obvious.
Sometimes it takes several minutes.
Sometimes a chain suddenly collapses from seven words to three, and the shorter version feels almost inevitable once you see it.
That moment is the game.