 In the 20th century, several magicians published books containing examples of fold-and-cut problems, including Will Blyth, Harry Houdini, and Gerald Loe (1955).Inspired by Loe, Martin Gardner wrote about the fold-and-cut problems in "Scientific American" in 1960.Examples mentioned by Gardner include separating the red squares from the black squares of a checkerboard with one cut, and "an old paper-cutting stunt, of unknown origin" in which one cut splits a piece of paper into both a Latin cross and a set of smaller pieces that can be rearranged to spell the word "hell".