Three-player chess is a variant of the traditional game of chess that is played on a board divided into four quadrants. Each player controls a standard set of chess pieces in their own quadrant and can only move their pieces within their own quadrant. The game is won when a player captures the opponent's king. Because the board is divided into four quadrants, the game is more complex and requires more strategic thinking than standard chess. Each player has access only to their own quadrant, with the other quadrants being off-limits. This makes it more difficult to protect the king and creates additional challenges for players.