public boolean NoBlack()
  {
    for(int row = 0; row < 8; row++)
    {
      for(int col = 0; col < 8; col++)
      {
        if(b.GetPiece(row, col) == 1 || b.GetPiece(row, col) == 3)
        {
          return false;
        }
      }
    }
    return true;
  }