Dejarik or holographic chess or holochess is a fictional board game appearing in the Star Wars space opera franchise that uses holographic figures as pieces. The game has been roughly described as that universe's equivalent of terrestrial chess since it is played on a board with a chequered pattern, each piece has a specific way of moving and attacking, and if it lands on a spot occupied by an opponent, it destroys the other piece. As of 2021, no single, official rule set for the game has been released, and instead, a number of different rule sets (mostly designed by fans) for the game co-exist. Even the number of figures used in the game is unclear (although the best known variant uses eight).