History of Crossclimb

The word ladder, a classic genre

The principle that drives Crossclimb is nothing new. The word ladder is a classic letter-puzzle genre: you start from one word and transform it into another by changing a single letter at each step, with every intermediate word having to stay a valid word. This simple mechanic, one letter at a time, has occupied word lovers for generations, on paper as much as in puzzle collections.

The most famous attribution goes to Lewis Carroll, who popularized this game under the name "Doublets", published in the magazine Vanity Fair in 1879. The idea was already exactly that of Crossclimb: linking two words with a chain of steps, each changing only one letter. Since then, the genre has never really disappeared; it has circulated through puzzle columns, puzzle books and the imagination of crossword lovers, without ever changing in nature.

What makes this genre durable is how little it demands: no equipment is needed, only words and a single rule, change one letter without ever breaking the word. The difficulty arises on its own, because each step opens only a limited number of reachable words, and finding the right path between two words can take as much logic as vocabulary. It is this same balance, unchanged for decades, that Crossclimb picks up today, simply dressed for a screen.

What makes Crossclimb specific

Crossclimb does not simply reuse the word ladder: it adds two ideas that make it a full puzzle of its own. The first is the use of clues. Instead of giving you the words, the game has you guess them one by one from definitions, as in a crossword. You therefore do not build the ladder from known words, but must first recover the words themselves, which adds a layer of vocabulary to the pure logic of the letters.

The second idea is the ladder's double movement. Once the middle words are found, you have to put them back in the right order so each rung differs from the next by only one letter, then guess the two end words from a final clue. This structure, find, order, then close, turns an old letter pastime into a small complete puzzle, where vocabulary and arrangement matter equally. That is what sets Crossclimb apart from a plain word grid or a traditional word ladder.

The daily-puzzle wave

If the word ladder is old, its daily, shareable form is recent. The turning point came from Wordle, created by Josh Wardle, which became a global phenomenon in 2021 and was then acquired by the New York Times in 2022. Its format was disarmingly simple: a single puzzle per day, the same for everyone, easy to share once solved. That success drew a multitude of daily spinoffs across the web, each one taking an already familiar game mechanic and dressing it up as a daily ritual.

The word ladder was a natural candidate for this wave: compact, immediately understandable, and satisfying to solve in a few minutes. All it lacked was a daily wrapper and a platform to spread it at scale. That is precisely what LinkedIn gave it.

LinkedIn Crossclimb (2024)

In 2024, LinkedIn adds Crossclimb to its suite of daily mini-games. The professional network takes the word ladder, enriches it with clues to find each word and a final clue for the ends, and publishes one puzzle a day, the same for everyone. The daily rhythm and the sharing of results quickly make it a small professional ritual, played between two tasks or compared between colleagues.

But, as with the other games in the same suite, the format stays deliberately spare: a single puzzle per day, with no archive or extra round, inside the LinkedIn app. Lewis Carroll's old game thus enjoys renewed interest, but in a form limited to a single daily ladder.

Web versions, with no daily limit

The success of LinkedIn Crossclimb calls for web versions like ours. The idea is not to replace LinkedIn's daily puzzle, but to extend it: unlimited ladders, a daily challenge with a replayable archive, a tougher weekly challenge, and a bank of 120 hand-built puzzles per language, all free, with no account, in French and English. The old principle of the word ladder, having passed from nineteenth-century puzzle collections to digital platforms, is now played at will in a browser.

What these web versions add is therefore not a new rule, but volume and memory: where a daily puzzle fades the next day, an archive keeps it indefinitely, and where a single ladder per day limits practice, unlimited games let you improve at your own pace. For those who still prefer the ritual of a single puzzle a day, the daily challenge reproduces that constraint deliberately, while keeping its archive available.

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