This four-player chess variant is played on a square 14 14 board that excludes the four central squares. Each player controls a set of sixteen standard chess pieces, and additionally nine fairy pieces (of seven distinct types). The game can be played in partnership (two opposing teams of two) or all-versus-all. Each player's eight pawns are divided into two groups of four: one group moves forward along files, the other along ranks. For the remainder of the pieces, movement and capture work as per usual. There is no castling in Quatrochess. When a player is checkmated or stalemated, his king is immediately removed from the game and his remaining men become the property of the player delivering the mate or stalemate (all-versus-all game), or of his teammate (partnership game). The last surviving player (or team) is the winner.

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