Chess is played by two players on a chess board measuring eight-by-eight squares. The 64 squares alternate between light and dark colours - traditionally, black and white. When properly set up, a white square should be the rightmost square along the edge closest to each player.
Each square of the chessboard is identified by a unique coordinate pair—a letter and a number—from White's point of view. The vertical columns of squares, called files, are labeled a through h from White's left (the queenside) to right (the kingside). The horizontal rows of squares, called ranks, are numbered 1 to 8 starting from White's side of the board.