He was an expert in medicine, physics, algebra, geometry, astronomy, philosophy, law, metaphysics and metascience.
He has a book titled Jame'ol Madarek fy sharhe mokhtasare nafee in 14 volumes written in Arabic.
Ayatollah Khomeini referred to Jame'ol Madarek for his Fatwa, and chess was considered sound (Halal) to play after more than 1,000 years among Shiat Muslims.
There are other books claimed to be written by Ayatollah Haj Seyyed Ahmad Khansari; however, these were published after his death against his will.
After Ayatollah Boroujerdi's death, many Muslims of Iran and other countries referred to him and selected him as their religious leader.