chequer, n. & v. (also checker)
1 (often in pl.) a pattern of squares often alternately coloured.
2 (in pl.) (usu. as checkers) US the game of draughts.
1 mark with chequers.
2 variegate; break the uniformity of.
3 (as chequered adj.) with varied fortunes (a chequered career).
1 a chessboard.
2 a pattern resembling it.