 Modern open source libraries exist that attempt to efficiently generate legal arrangements from a given set of answers.In the late 1990s, the transition began from mostly hand-created arrangements to computer-assisted, which creators generally say has allowed authors to produce more interesting and creative puzzles, reducing crosswordese.Modern software includes large databases of clues and answers, allowing the computer to randomly select words for the puzzle, potentially with guidance from the user as to the theme or a specific set of words to pick with greater probability.