关于一个五子棋的界面

要用一个棋盘类来实现，代码如下：
public class Chessboard
{
//arrchessboard为棋盘情况数组，arrchessboard[i,j]=2表示此处无子，arrchessboard[i,j]=0表示此处为黑子，arrchessboard[i,j]=1表示此处为白子
private int[,] arrchessboard = new int [15,15];
//绘制的对象
private Graphics mg;
//棋子对象
private Stone stone;
//电脑对象
private Computer computer;
//判断当前棋子是黑(true)是白(false)
private bool stoneflag = true;
//判断先手玩家（是电脑(true)还是人(false)，先手下黑棋）
private bool mplayfirstflag = false;
//历史记录堆栈
private Stack mStarckHistory = new Stack();

/// <summary>
/// 历史记录属性
/// </summary>
public Stack StarckHistory
{
get
{
return mStarckHistory;
}
}

/// <summary>
/// 构造函数
/// </summary>
/// <param name="g">绘制的对象</param>
public Chessboard(Graphics g)
{
mg = g;
Initial