设计一个棋盘，使用者可以在网上自由下棋。棋盘包括黑白子，下棋时，现有黑子或白子出，每次只能出一个棋子，还有，相邻两次出奇的颜色不一样。-Design a board, the user can play chess online free. Board, including black and white children, playing chess, the current sunspot or albino out, you can only a pawn, and, the color