Conversation so far:
Where did he grow up?
Chicago, Illinois.
Did he have any siblings?
Joan Fischer.
What did he do as a child?
CANNOTANSWER.
Did he go to school?
At the time of her son's birth, Regina was "homeless" and shuttled to different jobs and schools around the country to support her family.

Question: What struggles did he go through growing up?
Self-contained rewrite: What struggles did Bobby Fischer go through in his childhood?