The history of the crossword puzzle

The crossword is over a century old, and its shape — the black-and-white grid, the numbered clue list, the interlocking answers — was mostly settled within its first couple of decades.

A diamond in the Sunday paper

The commonly credited starting point is a puzzle published by journalist Arthur Wynne in the New York World's Sunday supplement in December 1913. Wynne's puzzle was diamond-shaped rather than square, had no black squares, and was called a "word-cross" — a name that was reportedly swapped to "cross-word" in a later issue, likely due to a typesetting error, and the new name stuck.

From novelty to newspaper staple

The puzzle proved popular enough that other newspapers began running their own versions through the late 1910s and into the 1920s. The format solidified during this period: puzzles became square or rectangular, black squares were introduced to separate words cleanly, and numbering conventions for "across" and "down" clues emerged so solvers could navigate the grid consistently.

The 1924 boom

Crossword puzzles became a full cultural phenomenon in 1924, when the publishing house that would become Simon & Schuster released a dedicated book of crossword puzzles. It sold well beyond expectations and helped launch the company, while crossword-themed songs, fashion, and even crossword-printed napkins appeared as the format became a genuine fad in the United States.

The New York Times joins — reluctantly, then completely

For years, The New York Times treated crosswords as an unserious distraction unworthy of a serious newspaper. That changed during World War II, when the paper's editors reportedly concluded that puzzles offered a welcome, calming diversion during difficult news cycles. The Times launched its own crossword in 1942 and would go on to make it one of the most recognized puzzles in the world, known today for a difficulty curve that increases through the week from an easy Monday to a challenging Saturday.

The cryptic crossword develops its own tradition

In Britain, the crossword evolved along a different track. Rather than straightforward definitional clues, British newspapers developed the cryptic crossword, where each clue encodes the answer through wordplay — anagrams, hidden words, double meanings, and charades of smaller word parts — in addition to a more conventional definition. Cryptic-style crosswords remain the dominant form in UK newspapers and have their own devoted solving culture, distinct from the American style.

Crosswords go digital

Later in the 20th century and into the 21st, crosswords moved from print to software, then to the web and mobile apps, with instant answer-checking, timers, and shareable daily stats. Digital formats also made crossword construction more collaborative and iterative, with constructors testing grids using word-list software long before a puzzle reaches print or publication online.

Why the format has lasted

Part of the crossword's staying power is structural: the interlocking grid means every answer helps confirm its neighbors, which creates a satisfying feedback loop that few other word puzzles replicate. That same structure is why letter-pattern tools remain useful today — once a few crossing letters are confirmed, a lot of the guesswork disappears, and a pattern solver can close the gap between "almost got it" and a filled-in grid.