Looking ahead, he saw a woman playing by herself. He walked over, explained his confusion, and asked if she knew where he was.
— I’m on the 7th hole, and you are one hole behind me, so you must be on the 6th hole.

He thanked her and went back to his game.
On the back nine, the same thing happened. He found her again and asked the same question.
— I’m on the 14th hole, and you are one hole behind me, so you must be on the 13th hole.
Once again, he thanked her and finished his round.
