How to Play Word Ladder

The rules are simple but the puzzles can get surprisingly tricky:

• You're given a Start Word and a Target Word of equal length.
• Each turn, change exactly one letter of the current word to create a new word.
• Every word in your chain must be a valid dictionary word.
• You cannot change two letters at once, and you cannot rearrange letters.
• The goal is to reach the Target Word in as few steps as possible.
• Fewer steps = a higher score and better rank!

Word Ladder Rules Explained

One Letter Change Per Step

Each rung of the ladder can only change one letter from the previous word. You may change any one letter to any other letter, as long as the resulting word is a valid English word. For example: CAT → COT → COG → DOG. Each step changes exactly one letter.

Every Intermediate Word Must Be Valid

You cannot use proper nouns, abbreviations, or invented words. Every rung on your ladder must be a legitimate dictionary entry. This constraint is what makes finding short paths genuinely challenging.

Finding the Shortest Path

While you can technically take any number of steps to reach the target, the real challenge is finding the shortest valid ladder. Computer analysis determines the theoretical minimum path length, which sets the benchmark for the puzzle's "perfect" score.

The History of Word Ladder

Lewis Carroll (Charles Lutwidge Dodgson) invented Word Ladders — which he called "Doublets" — in December 1877 as a Christmas gift for his young nieces. The puzzle first appeared in the magazine Vanity Fair in 1879 and quickly became a national craze in Victorian England. Carroll published collections of Doublets puzzles, and the format has remained a staple of word puzzle books and newspapers ever since. With the rise of online word games following Wordle's viral success, Word Ladder has been rediscovered by a new generation of puzzle enthusiasts.

Word Ladder Example

Here's a classic example: transforming CAT into DOG in four steps:

Word Ladder Strategy Tips

Work Toward High-Frequency Letters

Letters like E, A, R, S, T, and N appear in the most English words. When stuck, try changing a letter to one of these common letters — it maximizes your chances of finding a valid next word.

Think in Both Directions

Instead of only thinking forward from the start word, also think backward from the target word. Meeting in the middle often reveals shorter paths that aren't visible when approaching from only one end.

Change the Most Different Letter First

If your start and target words share some letters but differ in others, try changing the most "difficult" letter first — the one that connects to the fewest valid words — to get past that bottleneck early.

Try Other Word Mechanics Games

Loved Word Ladder? Try Semantle for meaning-based word connections, challenge yourself with Anagramle's letter rearrangements, or explore vocabulary with Spelling Bee!

Frequently Asked Questions