Chess aesthetics or beauty in chess is generally appreciated by both players and composers. This is evident, for example, in brilliancy prizes awarded to some games in certain tournaments and also in the world of chess composition. There are many books published featuring chess problems or puzzles that emphasize its aesthetic aspect. One of the earliest is from the 9th century AD. Aesthetics in chess can be both a source of pleasure for humans and also instruction, as compositions or games featuring it typically illustrate original ideas or new instantiations of old ones. A good chess problem composer, however, is not necessarily a good player.