def chessBoard(tr,tc,dr,dc,size):
 global tile
 global board
 if (size==1):
  return 0
 tile+=1
 t=tile
 s=size//2
 #the upper left corner
 if (dr<tr+s and dc<tc+s):
  chessBoard(tr,tc,dr,dc,s)
 else:
  board[tr+s-1,tc+s-1]=t
  chessBoard(tr,tc,tr+s-1,tc+s-1,s)
 #the upper right corner
 if (dr<tr+s and dc>=tc+s):
  chessBoard(tr,tc+s,dr,dc,s)
 else:
  board[tr+s-1,tc+s]=t
  chessBoard(tr,tc+s,tr+s-1,tc+s,s)
 #the lower left corner
 if (dr>=tr+s and dc<tc+s):
  chessBoard(tr+s,tc,dr,dc,s)
 else:
  board[tr+s,tc+s-1]=t
  chessBoard(tr+s,tc,tr+s,tc+s-1,s)
 #the lower right corner
 if (dr>=tr+s and dc>=tc+s):
  chessBoard(tr+s,tc+s,dr,dc,s)
 else:
  board[tr+s,tc+s]=t
  chessBoard(tr+s,tc+s,tr+s,tc+s,s)

def drawboard(canvas1,board,colors,startx=50,starty=50,cellwidth=50):
 width=2*startx+len(board)*cellwidth
 height=2*starty+len(board)*cellwidth
 canvas1.config(width=width,height=height)#布置画布
 for i in range(len(board)):
  for j in range(len(board)):
   index=board[i][j]
   if index== 0:    
    color='white'#特殊方格显示为白色
   else:
    color=colors[6*index]#为了间隔开颜色
   cellx=startx+i*50
  celly=starty+j*50  
  canvas1.create_rectangle(cellx,celly,cellx+cellwidth,celly+cellwidth,fill=color,outline="black")#画方格
 canvas1.update()