Chess piece given time. Except for castling and the knight's move, no piece may jump over another piece . The variety of designs available is broad, from small cosmetic changes to highly abstract representations, to themed designs such as those that emulate the drawings from the works of Lewis Carroll, or modern treatments such as "Star Trek" or "The Simpsons". Themed designs are generally intended for display purposes rather than actual play . Some works of art are designs of chess sets, such as the modernist chess set by chess enthusiast and dadaist Man Ray, that is on display in the Museum
The Morals of Chess chess to life and writes that foresight, circumspection and caution can be learnt from the game. After describing the effects chess can have on one's perception of life he describes a set of moral rules that a chess player should hold, including to not cheat and not disturb the opponent. Franklin suggests that the opponent be told about mistakes he makes, for example if he would lose a piece. The essay is one of the first texts about chess that was published in the United States; it appeared in the first chess-related book that was published in Russia in 1791.