public void Draw( int x, int y, Board board)
{
Graphics g=board.Grap ;
int w =board.Width/20;
int x0,y0,r;
x0= x*w-w/2;
y0= y*w-w/2;
r=w/2+w/2;
Brush b = new SolidBrush(color);
g.FillEllipse(b,x0,y0,r,r);
}
private void Form1_Load(object sender, System.EventArgs e)
{
if (this.panel1.Width>this.panel1.Height)
this.panel1.Width=this.panel1.Height;
else
this.panel1.Height=this.panel1.Width;
Graphics g = this.panel1.CreateGraphics();
b = new Board(g);
b.Width=this.panel1.Width ;
b.Draw();
}