A checkerboard (American English) or chequerboard (British English; see spelling differences) is a board of checkered pattern on which checkers (also known as English draughts) is played. Most commonly, it consists of 64 squares (8×8) of alternating dark and light color, typically green and buff (official tournaments), black and red (consumer commercial), or black and white (printed diagrams). An 8×8 checkerboard is used to play many other games, including chess, whereby it is known as a chessboard. Other rectangular square-tiled boards are also often called checkerboards.

## Games and puzzles using checkerboards

Martin Gardner featured puzzles based on checkerboards in his November 1962 Mathematical Games column in Scientific American. A square checkerboard with an alternating pattern is used for games including:

The following games require an 8×8 board and are sometimes played on a chessboard.

## Mathematical description

Given a grid with $m$ rows and $n$ columns, a function $f(m,n)$ ,

$\displaystyle {f(m,n)}={\begin{cases}{\text{black))&{\text{if))\ m\equiv n{\pmod {2))\,,\\{\text{white))&{\text{if))\ m\not \equiv n{\pmod {2))\\\end{cases))$ or, alternatively,

$\displaystyle {f(m,n)}={\begin{cases}{\text{black))&{\text{if))\ m+n{\text{ is even)),\\{\text{white))&{\text{if))\ m+n{\text{ is odd))\\\end{cases))$ The element $(m,n)=(0,0)$ is black and represents the lower left corner of the board.