About Chess

Rules

The rules of chess are published by FIDE (Fédération Internationale des Échecs), chess's international governing body, in its Handbook. Rules published by national governing bodies, or by unaffiliated chess organizations, commercial publishers, etc., may differ. FIDE's rules were most recently revised in 2018.

Setup

Initial position, first (bottom) row: rook, knight, bishop, queen, king, bishop, knight, and rook; second row: pawns

By convention, chess game piece are divided into white and black sets. Each set consists of 16 pieces: one king, one queen, two rooks, two bishops, two knights, and eight pawns. The pieces are set out as shown in the diagram and photo. The players of the sets are referred to as White and Black, respectively.

The game is played on a square board of eight columns (called files, denoted a to h from left to right according to White's perspective) and eight rows (called ranks, denoted 1 to 8 from bottom to top according to White's perspective). The 64 squares alternate in color and are referred to as light and dark squares. The chessboard is placed with a light square at the right-hand corner nearest to each player. Thus, each queen starts on a square of its own color (the white queen on a light square; the black queen on a dark square).

Movement

In competitive games, the colors are allocated by the organizers; in informal games, the colors are usually decided randomly, for example by a coin toss, or by one player concealing a white pawn in one hand and a black pawn in the other, and having the opponent choose. White moves first, after which players alternate turns, moving one piece per turn (except for castling, when two pieces are moved). A piece is moved to either an unoccupied square or one occupied by an opponent's piece, which is captured and removed from play. With the sole exception of en passant, all pieces capture by moving to the square that the opponent's piece occupies.

Moving is compulsory; it is illegal to skip a turn, even when having to move is detrimental. A player may not make any move that would put or leave the player's own king in check. If the player to move has no legal move, the game is over; the result is either checkmate (a loss for the player with no legal move) if the king is in check, or statement (a draw) if the king is not.

If players wish to adjust a piece on the board, they must first say J'adoube (I adjust) or the equivalent. Apart from that, if a piece is touched it must be moved or captured if possible (the 'touch and move' rule). Similarly if a move is finished, it must not be taken back.

Each piece has its own way of moving. In the diagrams, the dots mark the squares to which the piece can move if there are no intervening piece(s) of either color (except the knight, which leaps over any intervening pieces).