What is a square or oblong piece of thin wood or other material used for some special purpose, as, a molding board; a board or surface painted or arranged for a game; as, a chessboard; a backgammon board called?

board — A square or oblong piece of thin wood or other material used for some special purpose, as, a molding board; a board or surface painted or arranged for a game; as, a chessboard; a backgammon board. (Webster's 1913.)

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