In algebraic notation, each file is assigned a letter, and each rank is assigned a number. Each square is designated by the letter and number from it's rank and file. a1 is the square in the bottom left corner for the white player. | In algebraic notation, each file is assigned a letter, and each rank is assigned a number. Each square is designated by the letter and number from it's rank and file. a1 is the square in the bottom left corner for the white player. |