A board game is a game in which counters or pieces are placed, removed, or moved on a premarked surface or "board" according to a set of rules. Games may be based on pure strategy, chance or a mixture of the two and usually have a goal which a player aims to achieve. Early board games represented a battle between two armies and most current board games are still based on beating opposing players in terms of counters, winning position or accrual of points (often expressed as in-game currency).