The form of chess notation by using a combination of letters and numbers - a to h and 1 to 8 - which denote the 64 squares on a board.
A method for writing moves down by using the names of the pieces and the ranks and files. Replaced older Descriptive Notation (“P-K4" is now "e4") about 1970.
A way of recording a chess game using alphanumeric codes for the squares.