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Word ladder

Lewis Carroll's doublet in Vanity Fair, March 1897 changing the word "head" to "tail" in five steps, one letter at a time

Word ladder (also known as Doublets,[1] word-links, change-the-word puzzles, paragrams, laddergrams,[2] or word golf) is a word game invented by Lewis Carroll. A word ladder puzzle begins with two words, and to solve the puzzle one must find a chain of other words to link the two, in which two adjacent words (that is, words in successive steps) differ by one letter.[3]

  1. ^ Cite error: The named reference Oxford was invoked but never defined (see the help page).
  2. ^ "Laddergrams". Laddergrams. Retrieved 2016-03-05.
  3. ^ Deanna Haunsperger, Stephen Kennedy (July 31, 2006). The Edge of the Universe: Celebrating Ten Years of Math Horizons. Mathematical Association of America. p. 22. ISBN 0-88385-555-0.

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