In the play Oedipus the King by Sophocles, how can Oedipus himself be the answer

Question:("What walks on four legs in the morning, two legs in the afternoon, and three legs at night?")
and please tell me a good analysis on the play

Best Answer - Chosen by Asker: ("What walks on four legs in the morning, two legs in the afternoon, and three legs at night?")
and please tell me a good analysis on the play

Oedipus was not the answer to the Riddle of the Sphinx. Oedipus was the answer to the mystery of why Thebes was being plagued by such ill fortune. Oedipus resolved to get to the bottom of the mystery no matter what the cost.
A seer revealed to Oedipus that, despite all efforts to prevent it, an old prophecy had come true when Oedipus killed a man (who turned out to be his father) and married the man's widow (his mother). Oedipus, mad with shame and regret, put out his own eyes and at the end of the play leaves Thebes to wander the world in misery.

Well, the answer to the riddle is "man" (crawls as a baby on 4 legs, walks on two legs as an adult, uses a cane as an old man so it's 3 legs) and Oedipus is a man...

I don't really get what you are asking.