"Did You Add Your if Statement With the “Game Over” Message?" Error


after adding the If statement, i get this error message

Did you add your if statement with the “Game Over” message?

and this is my code

for turn in range(4):
 # print "Turn", turn + 1
  guess_row = int(raw_input("Guess Row: "))
  guess_col = int(raw_input("Guess Col: "))

  if guess_row == ship_row and guess_col == ship_col:
    print "Congratulations! You sank my battleship!"   
    if guess_row not in range(5) or \
      guess_col not in range(5):
      print "Oops, that's not even in the ocean."
    elif board[guess_row][guess_col] == "X":
      print( "You guessed that one already." )
      print "You missed my battleship!"
      board[guess_row][guess_col] = "X"
    if turn == 3:
      print "Game over"

Where should I add this game over condition?

the string printed needs to be an exact match