What did R.H.M. stand for? I have a number of old chess books published by R.H.M. Press. I am curious as to whether "R.H.M." are the initials of something or someone, and if so, what?

As I understand it, R.H.M. Press was the brainchild of Sidney Fried, and Burt Hochberg was the chief editor of many of the books.  Unfortunately, neither of them is still alive.  I found a short article by Hochberg in the Summer 2000 issue of Publishing Research Quarterly entitled "An imperfect visionary," which gives some interesting historical information about R.H.M. Press, but no hint of what R.H.M. might stand for, if anything.

None of the possibilities listed by The Free Dictionary looks plausible to me.
Well, let's take Random House off the table right away, as RHM Press was a division of RHM Associates of Delaware, Inc. which lists Sydney Fried as Publisher. The California Secretary of State system lists an RHM Publishing as a "Doing Business As" name for RHM Associates.

Unfortunately, No list of officers.

There's a blurb in the beginning of San Antonio 1972 (the first book RHM published) that talks a little bit about the venture, but no details. Since the most likely RHM Associates of Delaware I can find is an investment firm, I lean towards the idea the RHM name came from the folks that supplied the money to start it.