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What do files and ranks mean on a chessboard?
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chess
Position of chess pieces at the beginning of a game. The pieces are placed on the two ranks closest to the player. In the closest rank, pieces are arranged from left to right: rook, knight, bishop, queen, king, bishop, knight, and rook. In front of that rank, each square has a pawn.
On a chessboard, the 64 squares are organized into a grid defined by files and ranks:
- Files: These are the eight vertical rows of squares. In algebraic notation, they are labeled with the letters a through h, starting from the left side of the player controlling the white pieces.12
- Ranks: These are the eight horizontal rows of squares. They are numbered 1 through 8, starting from the rank closest to the player with the white pieces.12
Together, these coordinates allow each square to be uniquely identified by a letter and a number, such as a1 or e4. Additionally, the board is divided into the queenside (files a through d) and the kingside (files e through h).2