The Cortland County Clerk's Office issues and receives all applications and amendments for pistol permits. In Cortland County, Judge William F. Ames and Judge Julie A. Campbell are the licensing officers of handguns and licensing is completely within their discretion.
In 1998 Hikaru Nakamura (born Dec 9, 1987) bacame America's youngest master at 10 years, 79 days. In 2001 he became America's youngest International Master at age 13. The first list of grandmasters appeared in 1950, published by FIDE. There were 27 chess players nominated as the first grandmasters.
It's completely impossible to actually teach her chess at this age though. So the answer to the question can only be it depends entirely on the child. Whenever the kid becomes interested in learning chess is the best age. (that said, if they taught the rules of chess at school right now, she'd probably soak them up.