Meaning: The pieces are moved across the board according to the outcome of the dice roll.
Choice of Words: The word "pieces" refers to the markers or objects used to represent players or teams in a game. "Move" means to change position or location. "Across" means from one side to the other. "Board" is the surface on which a game is played. "Based" means determined or dependent on something else. "Roll" refers to the outcome of throwing dice.