I didn't know that name, though all the others (Hort, Gheorghiu, Parma etc) are very familiar. He has 46 games on Chessgames (this is the loss to Scotland's Derek Thomson) but nothing for the 1960s after the World Junior. The comments do tell us that Tim Krabb'e was trying to trace him (see 48) twenty years ago in connection with Kuindzhi's 1970 refutation of Mitrofanov's 1967 study.
Doug observes that he can't be found on the Russian-language Wikipedia pages but does also say:
and he suggestsHis name crops up in Soviet publications, mainly as an annotator. He played in the Moscow Championship final a couple of times in the '70s, so he was at least resident there for a while. He also played in a number of USSR Armed Forces Team championships over quite a wide period
Still, we know both of those two as strong grandmasters, and I was (and am) intrigued that a player of that standard, in the Soviet Union at that time, should apparently drop out of sight as far as over the board chess is concerned, and be so obscure to us now. So I wondered - is anything more known about Kuindzhi? Did he stop playing in the decade after the World Junior?it could be that he was a career army officer (like, e.g. Dorfman or Tukmakov)..