Definition:Chess/Chessboard

Definition
A chessboard is an array (usually square) of alternating dark and light squares (conventionally referred to as black and white, even though they may well not be those actual colours).

This may be referred to as an $m \times n$ chessboard, where:
 * $m$ is the number of ranks
 * $n$ is the number of files.

For the conventional chessboard, as depicted above, $m = n = 8$.