扩展应用是利用程序中已有的组件，实现新的功能，比如八皇后和迷宫求解。
Extension applications are already in use program components, to finish new features, such as the eight queens and maze solving.
将八皇后和迷宫求解两个经典问题成功应用到中国象棋程序中，充分体现了中国象棋程序的可扩展性。
Eight queens and maze solving bring the classic problem into the application of Chinese chess program; this fully reflects the scalability of the Chinese chess program.
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