The History of Word Ladder: Lewis Carroll's 1877 Word Game

Lewis Carroll invented word ladders because he was bored and had two restless girls to keep occupied. It was Christmas 1877, he was visiting friends in the English countryside, and the children needed entertaining. He sketched out a word puzzle that he called Doublets and showed it to them. They liked it enough that he wrote it up properly and sent it to Vanity Fair magazine a few weeks later.

The first Doublets column appeared on 29 March 1879. The puzzle was simple to explain: take two words of the same length, then change one letter at a time to turn one into the other, with every intermediate step being a real word. Carroll included worked examples and encouraged readers to submit solutions. The response was immediate.

What Carroll actually called it

Carroll used the word "Doublets" originally, then changed it to "Word Links" for a while, then back to Doublets. The puzzle went through several names in those early years. "Word Ladder" came later, used by other publications and puzzle editors who ran their own versions of the same game. By the early twentieth century, Word Ladder had become the most common name, at least in Britain and America.

Carroll also used the term "word golf" in some of his private notes, which is still a name some puzzle communities use today. The idea being that you want to complete the course (the ladder) in as few strokes (steps) as possible.

Carroll's own favourite puzzles

Carroll published solutions and bonus challenges alongside the original column. He was particularly proud of the puzzle that turned WHEAT into BREAD, which he solved in six steps. He also liked FISH into BIRD (five steps) and ARMY into NAVY (four steps, which he thought was elegantly tight).

Some of his puzzles gave readers a harder time than he expected. A column he thought was easy stumped most of his readership for weeks. He was amused by this, and it made him think more carefully about what made a puzzle fair versus cruel.

How the game spread

Vanity Fair ran Doublets for about four years. By the time Carroll stopped contributing the column, the game had already been copied by dozens of other publications. American newspapers picked it up in the early 1880s and adapted it for their own puzzle pages. The game required no equipment beyond a pencil and some vocabulary, which made it ideal for print.

By the 1900s, word ladder variants appeared in puzzle books, school curricula, and brain training manuals. The game was used by some teachers as a vocabulary exercise because it forced students to think systematically about letter patterns rather than just memorising words.

The computer science connection

In the twentieth century, word ladders became a serious object of study in computer science. The problem of finding the shortest path between two words in a word ladder is a classic example of a graph search problem, and it appeared in textbooks and programming courses as a way to teach algorithms. Donald Knuth, one of the most influential computer scientists of the twentieth century, analysed word ladders extensively in his writings.

Knuth even calculated that the five-letter words in a standard English dictionary form a network where most words can reach most other words in a reasonably small number of steps, something that holds because English five-letter words tend to share a lot of letter combinations.

Word ladders in the digital age

The puzzle moved online gradually through the 1990s and 2000s. Early word game websites hosted word ladder generators and solvers. When the daily puzzle format exploded in popularity following the success of Wordle in 2021, word ladders got a second wave of attention. Several daily ladder games launched, each with slightly different rules and scoring systems.

The appeal has not changed much from Carroll's original version. You still need the same thing: a decent vocabulary, patience to think through options systematically, and the willingness to backtrack when a path is not working. One hundred and forty-six years later, the puzzle he sketched for two bored children at Christmas is still genuinely fun.

What Carroll would probably think of daily digital word ladders

Hard to say, obviously. But Carroll was a mathematician who cared about rigour, a writer who cared about language, and a puzzle designer who cared about fairness. He would probably approve of the daily format because it creates a shared experience, something he was interested in with the Vanity Fair column. He might have some opinions about scoring systems. He always had opinions about things like that.