code: def valid_solution_hashtable(board):
      for i in range(len(board)):
          dict_row = defaultdict(int)
          dict_col = defaultdict(int)
          for j in range(len(board[0])):
              value_row = board[i][j]
              value_col = board[j][i]
              if not value_row or value_col == 0:
                  return False
              if value_row in dict_row:
                  return False
              else:
                  dict_row[value_row] += 1
  
              if value_col in dict_col:
                  return False
              else:
                  dict_col[value_col] += 1
  
      for i in range(3):
          for j in range(3):
              grid_add = 0
              for k in range(3):
                  for l in range(3):
                      grid_add += board[i * 3 + k][j * 3 + l]
              if grid_add != 45:
                  return False
      return True
  
label_desc: Use image node_id 1 for calling a global function with example usage: valid_solution_hashtable(board) and returns: True, False, False, False, False