Word Labyrinth

The History of Lewis Carroll's Doublets

Every word ladder you have ever played, including the five in today's Word Labyrinth, descends from a puzzle Lewis Carroll made up on Christmas Day 1877 for two girls who were bored. Here is what I'm sure of about it, and where I'm not sure I say so.

Christmas Day, 1877

Carroll told the story himself in the preface to the 1879 book. Two young ladies, "smarting under that sorest scourge of feminine humanity, the having 'nothing to do'", asked him for riddles. He had none to hand, so he invented something else. By the usual account the two were Julia and Ethel Arnold, daughters of Thomas Arnold the younger; Julia later married Leonard Huxley and became Aldous Huxley's mother, which is a strange footnote for a Christmas parlour game.

He called the puzzle Doublets. Two words of the same length, the doublets. Turn one into the other by changing a single letter at a time, every word along the way a real one. The example he gave in that preface is the one every history still quotes:

HEAD → HEAL → TEAL → TELL → TALL → TAIL

Five steps, and TEAL (the duck) is still the rung that catches people 150 years later.

The Vanity Fair column

The game travelled through Carroll's circle for a year before it went public. The weekly magazine Vanity Fair ran the first Doublets column on 29 March 1879, and the puzzles kept coming week after week for well over a year. Readers posted in their chains, the magazine printed results, and the shortest chains scored best. It was a competition before it was a pastime.

Macmillan collected the puzzles the same year as Doublets: A Word-Puzzle, with the preface that tells the Christmas story and sets out the rules. The arguments started immediately, of course. Is TEAL a word? Is SHEW? Later printings carried a glossary of the words he would allow, which I take as the first recorded instance of the dictionary row that every word-ladder game has had since, ours included.

The rules, as he wrote them

  1. The two given words (the doublets) are joined by a chain of other words (the links).
  2. Each link differs from the word before it by one letter only.
  3. Only a change in place counts. Nothing is added, removed or rearranged.

That's the whole game. Word Labyrinth bends rule three in the daily ladder, where a step may also add a letter, and keeps it strictly in the Pure Swap weekly challenge, which is Carroll's game to the letter.

Puzzles he set

Carroll liked to phrase a doublet as a small instruction: drive PIG into STY, raise FOUR to FIVE, make WHEAT into BREAD, turn APE into MAN. I'm confident those pairs are his. The solutions below are mine, checked against our own word list, so don't quote them as his.

PIG → STY (5 steps)

PIG → WIG → WAG → WAY → SAY → STY

Three-letter words are generous: PIG has eighteen neighbours in our list and you can wander. The end is the constraint. Every neighbour of STY is an S_Y word (SAY, SHY, SKY, SLY, SOY, SPY), so the real puzzle is reaching one of those.

FOUR → FIVE (7 steps)

FOUR → FOUL → FOIL → FAIL → FALL → FILL → FILE → FIVE

Seven with plain words. The F never moves; everything else does, twice.

APE → MAN (5 steps)

APE → APT → OPT → OAT → MAT → MAN

Darwin's Origin of Species was twenty years old in 1879 and still an argument at dinner tables. A clergyman printing a puzzle that turns APE into MAN one letter at a time knew exactly what he was doing.

WHEAT → BREAD (6 steps)

WHEAT → CHEAT → CLEAT → BLEAT → BLEAK → BREAK → BREAD

CLEAT and BLEAT are the kind of words Victorian readers knew better than we do.

Two classics I can't pin on him

FLOUR → BREAD and BLACK → WHITE are the two chains most often called "Carroll's". I haven't seen the original pages, so I'll call them classics and leave it there.

FLOUR → FLOOR → FLOOD → BLOOD → BROOD → BROAD → BREAD

Six steps, and the double-O bridge from FLOOR to BROOD is as neat as the puzzle gets.

BLACK → SLACK → SLICK → SLICE → SPICE → SPINE → SHINE → WHINE → WHITE

Eight with words you'd say out loud. The old seven-step route runs through CHINE, an animal's backbone, which is the sort of word that made the glossary necessary.

The mathematician

Dodgson lectured in mathematics at Christ Church, Oxford, and the puzzles were not a sideline from that so much as the same habit in a different coat. He went on to publish The Game of Logic (1886) and Symbolic Logic (1896), both of which try to make formal reasoning into something you can play at a table. Doublets is the same instinct applied to spelling: a rule small enough to state in one breath, with more depth under it than the rule suggests.

What it was called afterwards

The name Doublets didn't survive him. Newspaper puzzle pages called it a word ladder, a word chain, sometimes just "Carroll's puzzle". Nabokov called it word golf in Pale Fire (1962), where a character boasts of doing HATE to LOVE in three (it needs LAVE, and you can judge whether that's fair). The rules never changed; only the name did.

Then Wordle happened in 2022, everyone wanted one small word puzzle a day, and the ladder came back with it. Weaver is one four-letter ladder a day. Word Labyrinth is our version: five puzzles of three to six letters, each graded against the shortest possible path, with streaks, a leaderboard and an Expert mode that serves nothing under eight steps. Dressed up, but underneath it's still the game from 1877.

Why it lasted

The rule takes ten seconds to learn and the first puzzle a minute to solve. After that the difficulty is all in the words, and English has an inexhaustible supply of pairs that look close and aren't. Carroll's own HEAD → TAIL is the whole argument in one line: you can see the start and the end, you know it's possible, and the one word you need is a duck.

Sources and further reading

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