How to read the examples
Every pair of adjacent words has the same length and differs in exactly one letter position. A move is one change, so a route containing four displayed words has three moves. The examples become progressively longer, but they use the same basic rule.
Easy example: CAT → DOG
CAT → COT → DOT → DOG takes three moves.
- Change A to O: CAT becomes COT.
- Change C to D: COT becomes DOT.
- Change T to G: DOT becomes DOG.
This is a useful beginner example because every rung is familiar and each move makes part of the target visible.
Medium example: HEAD → TAIL
HEAD → HEAL → TEAL → TELL → TALL → TAIL takes five moves.
- HEAD → HEAL changes D to L.
- HEAL → TEAL changes H to T.
- TEAL → TELL changes A to L.
- TELL → TALL changes E to A.
- TALL → TAIL changes the third L to I.
The route temporarily moves through TELL, which does not look much closer to TAIL. That bridge creates TALL, allowing the final move. A useful intermediate word does not always resemble the target immediately.
Hard example: FISH → BIRD
One valid route is FISH → DISH → DASH → BASH → BATH → BATS → BITS → BIDS → BINS → BIND → BIRD. It takes ten moves.
The first half changes FISH into a flexible group of B-words. The sequence then uses BITS, BIDS, BINS and BIND to change the final two positions one at a time before reaching BIRD. Checking the route in pairs makes the long chain easier to verify.
How to improve a completed route
- Check legality. Compare every pair and confirm that exactly one position changed.
- Remove loops. If the route returns to a word it has already used, cut out the repeated section.
- Look for shortcuts. Compare words two steps apart; sometimes a different bridge can replace several moves.
- Compare alternatives. A solver may find a shorter route, but a longer valid route is still a successful ladder.
Try another ladder
Learn a repeatable approach in How to Solve Word Ladders, practise with the 4-letter puzzles and 5-letter puzzles, or check a route with the Word Ladder Solver.