Young Problemist

Source: Shachmat, March 1964 (Vol. 2 no. 8), p/ 16

The following problem is not particularly good, admits the editor (Hillel Aloni) of Shachmat's problems & studies section. But -- he adds -- it has a saving grace. The composer, Ron Eisenstein, was... seven years old!

Shachmat adds, on the next page, a letter (written by his father in Ron's name) that he started learning chess in Kiryat Ono at the age of six and a half, with the instructor Itzchak Aloni; won a prize as a solver in Davar's chess column, and continues to solve problems in the newspapers. 

Edward Winter, in C. N. 2184 (also in King, Commoners, and Knaves p. 234) gives a younger problemist -- Elliot Franklin Eichholz, age five (source: American Chess Bulletin, May-June 1917, p. 132), also -- unsurprisingly -- a simple mate in two.

Do the readers know of any other very young composers?

(Highlight below for the solution)

1. Kh6