void control_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (e.OriginalSource is Canvas || e.OriginalSource is Line)
            {
                Chessman chessman =ReadyMoveChessman;
                if (chessman != null)
                {
                    Point fixPoint = FixPoint(e.GetPosition(null));
                    if (FindChessman(fixPoint) == null)//这里是新增加的一行判断语句
                    {
                        Action.MoveTo(chessman, fixPoint);
                    }
                   
                }
            }
        }

//这个是炮原有的if语句
if (x1 == x2 && (yCount == 0 && !exits) || (yCount == 1 && exits)
 || y1 == y2 && (xCount == 0 && !exits) || (xCount == 1 && exits))

//现修正括号为：
if (x1 == x2 && ((yCount == 0 && !exits) || (yCount == 1 && exits))
 || y1 == y2 && ((xCount == 0 && !exits) || (xCount == 1 && exits)))

 /// <summary>
        /// 移动规则
        /// </summary>
        /// <param name="move">棋子</param>
        /// <param name="eat">移动的位置的数组</param>
        /// <returns></returns>
        public bool IsCanMove(Chessman chessman, Point moveTo)
        {
            //...省略N行...            
            if (x2 >= 0 && x2 < 9 && y2 >= 0 && y2 < 10 && !(x1 == x2 && y1 == y2))//在棋盘之内,非原步。
            {
                Chessman man = Action.Parent.FindChessman(moveTo);
                if (man != null && chessman.Color == man.Color)//增加棋子存在和颜色判断
                {
                    return false;
                }
                ChessType chessType = GetChessTypeByName(chessman.Name);
                switch (chessType)
                {
                  //...省略N行...            
                    case ChessType.Jiang:
                        //将军面对面
                        if (man != null && GetChessTypeByName(man.Name) == ChessType.Jiang)
                        {
                            OutCount(chessman.MovePoint, moveTo, out xCount, out yCount);
                            return x1 == x2 && yCount == 0;
                        }
                       //...省略N行...                            }
            }
            return false;
        }