A crossword puzzle is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases crossing each other horizontally and vertically according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to separate entries. The first white square in each entry is typically numbered to correspond to its clue. Crosswords commonly appear in newspapers and magazines, and there are many variants of crosswords popular around the world, including cryptic crosswords and many language-specific variants
. The first modern crossword puzzle was published on December 21, 1913, in the New York World’s Sunday supplement, Fun
